diff --git a/Cronet/apex/Android.bp b/Cronet/apex/Android.bp
index 180dafb..29155cc 100644
--- a/Cronet/apex/Android.bp
+++ b/Cronet/apex/Android.bp
@@ -18,7 +18,7 @@
 
 // CronetApexDefaults uses apex_defaults cronet_apex_defaults specifies. cronet_apex_defaults
 // could be "CronetApexDefaultsEnabled" or "CronetApexDefaultsDisabled" depending on the branch.
-cronet_apex_defaults = "CronetApexDefaultsEnabled"
+cronet_apex_defaults = "CronetApexDefaultsDisabled"
 // This is a placeholder comment to avoid merge conflicts
 // as cronet_apex_defaults may have different values
 // depending on the branch
diff --git a/Tethering/apex/Android.bp b/Tethering/apex/Android.bp
index b26911c..31fd645 100644
--- a/Tethering/apex/Android.bp
+++ b/Tethering/apex/Android.bp
@@ -36,16 +36,16 @@
 // different value depending on the branch.
 java_defaults {
     name: "ConnectivityNextEnableDefaults",
-    enabled: true,
+    enabled: false,
 }
 apex_defaults {
     name: "ConnectivityApexDefaults",
     // Tethering app to include in the AOSP apex. Branches that disable the "next" targets may use
     // a stable tethering app instead, but will generally override the AOSP apex to use updatable
     // package names and keys, so that apex will be unused anyway.
-    apps: ["TetheringNext"], // Replace to "Tethering" if ConnectivityNextEnableDefaults is false.
+    apps: ["Tethering"], // Replace to "Tethering" if ConnectivityNextEnableDefaults is false.
 }
-enable_tethering_next_apex = true
+enable_tethering_next_apex = false
 // This is a placeholder comment to avoid merge conflicts
 // as the above target may have different "enabled" values
 // depending on the branch
@@ -54,7 +54,7 @@
 // enables or disables inclusion of Cronet in the Tethering apex. This is used to disable Cronet
 // on tm-mainline-prod. Note: in order for Cronet APIs to work Cronet must also be enabled
 // by the cronet_java_*_defaults in common/TetheringLib/Android.bp.
-cronet_in_tethering_apex_defaults = "CronetInTetheringApexDefaultsEnabled"
+cronet_in_tethering_apex_defaults = "CronetInTetheringApexDefaultsDisabled"
 // This is a placeholder comment to avoid merge conflicts
 // as cronet_apex_defaults may have different values
 // depending on the branch
diff --git a/Tethering/common/TetheringLib/Android.bp b/Tethering/common/TetheringLib/Android.bp
index cbdf0c0..ba9765c 100644
--- a/Tethering/common/TetheringLib/Android.bp
+++ b/Tethering/common/TetheringLib/Android.bp
@@ -21,8 +21,8 @@
 // specify a java_defaults target that either enables or disables Cronet. This
 // is used to disable Cronet on tm-mainline-prod.
 // Note: they must either both be enabled or disabled.
-cronet_java_defaults = "CronetJavaDefaultsEnabled"
-cronet_java_prejarjar_defaults = "CronetJavaPrejarjarDefaultsEnabled"
+cronet_java_defaults = "CronetJavaDefaultsDisabled"
+cronet_java_prejarjar_defaults = "CronetJavaPrejarjarDefaultsDisabled"
 // This is a placeholder comment to avoid merge conflicts
 // as cronet_defaults may have different values
 // depending on the branch
@@ -30,7 +30,7 @@
 // cronet_java_defaults_enabled_srcs is used to specify the srcs of CronetJavaDefaultsEnabled
 // This is required until the external/cronet is auto-merged to tm-mainline-prod and
 // :cronet_aml_api_sources is available
-cronet_java_defaults_enabled_srcs = [":cronet_aml_api_sources"]
+cronet_java_defaults_enabled_srcs = []
 // This is a placeholder comment to avoid merge conflicts
 // as cronet_defaults may have different values
 // depending on the branch
diff --git a/nearby/README.md b/nearby/README.md
index 6925dc4..8451882 100644
--- a/nearby/README.md
+++ b/nearby/README.md
@@ -29,6 +29,20 @@
 $ aidegen .
 # This will launch Intellij project for Nearby module.
 ```
+Note, the setup above may fail to index classes defined in proto, such
+that all classes defined in proto shows red in IDE and cannot be auto-completed.
+To fix, you can mannually add jar files generated from proto to the class path
+as below.  First, find the jar file of presence proto with
+```sh
+ls $ANDROID_BUILD_TOP/out/soong/.intermediates/packages/modules/Connectivity/nearby/service/proto/presence-lite-protos/android_common/combined/presence-lite-protos.jar
+```
+Then, add the jar in IDE as below.
+1. Menu: File > Project Structure
+2. Select Modules at the left panel and select the Dependencies tab.
+3. Select the + icon and select 1 JARs or Directories option.
+4. Select the JAR file found above, make sure it is checked in the beginning square.
+5. Click the OK button.
+6. Restart the IDE to re-index.
 
 ## Build and Install
 
@@ -40,3 +54,23 @@
     --output /tmp/tethering.apex
 $ adb install -r /tmp/tethering.apex
 ```
+
+## Build and Install from tm-mainline-prod branch
+When build and flash the APEX from tm-mainline-prod, you may see the error below.
+```
+[INSTALL_FAILED_VERSION_DOWNGRADE: Downgrade of APEX package com.google.android.tethering is not allowed. Active version: 990090000 attempted: 339990000])
+```
+This is because the device is flashed with AOSP built from master or other branches, which has
+prebuilt APEX with higher version. We can use root access to replace the prebuilt APEX with the APEX
+built from tm-mainline-prod as below.
+1. adb root && adb remount; adb shell mount -orw,remount /system/apex
+2. cp tethering.next.apex com.google.android.tethering.apex
+3. adb push  com.google.android.tethering.apex  /system/apex/
+4. adb reboot
+After the steps above, the APEX can be reinstalled with adb install -r.
+(More APEX background can be found in https://source.android.com/docs/core/ota/apex#using-an-apex.)
+
+## Build APEX to support multiple platforms
+If you need to flash the APEX to different devices, Pixel 6, Pixel 7, or even devices from OEM, you
+can share the APEX by ```source build/envsetup.sh && lunch aosp_arm64-userdebug```. This can avoid
+ re-compiling for different targets.
diff --git a/nearby/framework/java/android/nearby/DataElement.java b/nearby/framework/java/android/nearby/DataElement.java
index 6fa5fb5..4592c33 100644
--- a/nearby/framework/java/android/nearby/DataElement.java
+++ b/nearby/framework/java/android/nearby/DataElement.java
@@ -16,13 +16,17 @@
 
 package android.nearby;
 
+import android.annotation.IntDef;
 import android.annotation.NonNull;
+import android.annotation.Nullable;
 import android.annotation.SystemApi;
 import android.os.Parcel;
 import android.os.Parcelable;
 
 import com.android.internal.util.Preconditions;
 
+import java.util.Arrays;
+import java.util.Objects;
 
 /**
  * Represents a data element in Nearby Presence.
@@ -35,11 +39,80 @@
     private final int mKey;
     private final byte[] mValue;
 
+    /** @hide */
+    @IntDef({
+            DataType.BLE_SERVICE_DATA,
+            DataType.BLE_ADDRESS,
+            DataType.SALT,
+            DataType.PRIVATE_IDENTITY,
+            DataType.TRUSTED_IDENTITY,
+            DataType.PUBLIC_IDENTITY,
+            DataType.PROVISIONED_IDENTITY,
+            DataType.TX_POWER,
+            DataType.ACTION,
+            DataType.MODEL_ID,
+            DataType.EDDYSTONE_EPHEMERAL_IDENTIFIER,
+            DataType.ACCOUNT_KEY_DATA,
+            DataType.CONNECTION_STATUS,
+            DataType.BATTERY,
+            DataType.SCAN_MODE
+    })
+    public @interface DataType {
+        int BLE_SERVICE_DATA = 100;
+        int BLE_ADDRESS = 101;
+        // This is to indicate if the scan is offload only
+        int SCAN_MODE = 102;
+        int SALT = 0;
+        int PRIVATE_IDENTITY = 1;
+        int TRUSTED_IDENTITY = 2;
+        int PUBLIC_IDENTITY = 3;
+        int PROVISIONED_IDENTITY = 4;
+        int TX_POWER = 5;
+        int ACTION = 6;
+        int MODEL_ID = 7;
+        int EDDYSTONE_EPHEMERAL_IDENTIFIER = 8;
+        int ACCOUNT_KEY_DATA = 9;
+        int CONNECTION_STATUS = 10;
+        int BATTERY = 11;
+    }
+
+    /**
+     * @hide
+     */
+    public static boolean isValidType(int type) {
+        return type == DataType.BLE_SERVICE_DATA
+                || type == DataType.ACCOUNT_KEY_DATA
+                || type == DataType.BLE_ADDRESS
+                || type == DataType.SCAN_MODE
+                || type == DataType.SALT
+                || type == DataType.PRIVATE_IDENTITY
+                || type == DataType.TRUSTED_IDENTITY
+                || type == DataType.PUBLIC_IDENTITY
+                || type == DataType.PROVISIONED_IDENTITY
+                || type == DataType.TX_POWER
+                || type == DataType.ACTION
+                || type == DataType.MODEL_ID
+                || type == DataType.EDDYSTONE_EPHEMERAL_IDENTIFIER
+                || type == DataType.CONNECTION_STATUS
+                || type == DataType.BATTERY;
+    }
+
+    /**
+     * @return {@code true} if this is identity type.
+     * @hide
+     */
+    public boolean isIdentityDataType() {
+        return mKey == DataType.PRIVATE_IDENTITY
+                || mKey == DataType.TRUSTED_IDENTITY
+                || mKey == DataType.PUBLIC_IDENTITY
+                || mKey == DataType.PROVISIONED_IDENTITY;
+    }
+
     /**
      * Constructs a {@link DataElement}.
      */
     public DataElement(int key, @NonNull byte[] value) {
-        Preconditions.checkState(value != null, "value cannot be null");
+        Preconditions.checkArgument(value != null, "value cannot be null");
         mKey = key;
         mValue = value;
     }
@@ -61,6 +134,20 @@
     };
 
     @Override
+    public boolean equals(@Nullable Object obj) {
+        if (obj instanceof DataElement) {
+            return mKey == ((DataElement) obj).mKey
+                    && Arrays.equals(mValue, ((DataElement) obj).mValue);
+        }
+        return false;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(mKey, Arrays.hashCode(mValue));
+    }
+
+    @Override
     public int describeContents() {
         return 0;
     }
diff --git a/nearby/framework/java/android/nearby/NearbyDevice.java b/nearby/framework/java/android/nearby/NearbyDevice.java
index 538940c..e8fcc28 100644
--- a/nearby/framework/java/android/nearby/NearbyDevice.java
+++ b/nearby/framework/java/android/nearby/NearbyDevice.java
@@ -21,11 +21,13 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.SystemApi;
+import android.util.ArraySet;
 
 import com.android.internal.util.Preconditions;
 
 import java.util.List;
 import java.util.Objects;
+import java.util.Set;
 
 /**
  * A class represents a device that can be discovered by multiple mediums.
@@ -123,13 +125,17 @@
 
     @Override
     public boolean equals(Object other) {
-        if (other instanceof NearbyDevice) {
-            NearbyDevice otherDevice = (NearbyDevice) other;
-            return Objects.equals(mName, otherDevice.mName)
-                    && mMediums == otherDevice.mMediums
-                    && mRssi == otherDevice.mRssi;
+        if (!(other instanceof NearbyDevice)) {
+            return false;
         }
-        return false;
+        NearbyDevice otherDevice = (NearbyDevice) other;
+        Set<Integer> mediumSet = new ArraySet<>(mMediums);
+        Set<Integer> otherMediumSet = new ArraySet<>(otherDevice.mMediums);
+        if (!mediumSet.equals(otherMediumSet)) {
+            return false;
+        }
+
+        return Objects.equals(mName, otherDevice.mName) && mRssi == otherDevice.mRssi;
     }
 
     @Override
diff --git a/nearby/framework/java/android/nearby/NearbyDeviceParcelable.java b/nearby/framework/java/android/nearby/NearbyDeviceParcelable.java
index 8f44091..180b662 100644
--- a/nearby/framework/java/android/nearby/NearbyDeviceParcelable.java
+++ b/nearby/framework/java/android/nearby/NearbyDeviceParcelable.java
@@ -76,6 +76,17 @@
                         in.readByteArray(salt);
                         builder.setData(salt);
                     }
+                    if (in.readInt() == 1) {
+                        builder.setPresenceDevice(in.readParcelable(
+                                PresenceDevice.class.getClassLoader(),
+                                PresenceDevice.class));
+                    }
+                    if (in.readInt() == 1) {
+                        int encryptionKeyTagLength = in.readInt();
+                        byte[] keyTag = new byte[encryptionKeyTagLength];
+                        in.readByteArray(keyTag);
+                        builder.setData(keyTag);
+                    }
                     return builder.build();
                 }
 
@@ -96,6 +107,8 @@
     @Nullable private final String mFastPairModelId;
     @Nullable private final byte[] mData;
     @Nullable private final byte[] mSalt;
+    @Nullable private final PresenceDevice mPresenceDevice;
+    @Nullable private final byte[] mEncryptionKeyTag;
 
     private NearbyDeviceParcelable(
             @ScanRequest.ScanType int scanType,
@@ -108,7 +121,9 @@
             @Nullable String fastPairModelId,
             @Nullable String bluetoothAddress,
             @Nullable byte[] data,
-            @Nullable byte[] salt) {
+            @Nullable byte[] salt,
+            @Nullable PresenceDevice presenceDevice,
+            @Nullable byte[] encryptionKeyTag) {
         mScanType = scanType;
         mName = name;
         mMedium = medium;
@@ -120,6 +135,8 @@
         mBluetoothAddress = bluetoothAddress;
         mData = data;
         mSalt = salt;
+        mPresenceDevice = presenceDevice;
+        mEncryptionKeyTag = encryptionKeyTag;
     }
 
     /** No special parcel contents. */
@@ -164,6 +181,15 @@
             dest.writeInt(mSalt.length);
             dest.writeByteArray(mSalt);
         }
+        dest.writeInt(mPresenceDevice == null ? 0 : 1);
+        if (mPresenceDevice != null) {
+            dest.writeParcelable(mPresenceDevice, /* parcelableFlags= */ 0);
+        }
+        dest.writeInt(mEncryptionKeyTag == null ? 0 : 1);
+        if (mEncryptionKeyTag != null) {
+            dest.writeInt(mEncryptionKeyTag.length);
+            dest.writeByteArray(mEncryptionKeyTag);
+        }
     }
 
     /** Returns a string representation of this ScanRequest. */
@@ -210,7 +236,11 @@
                     && (Objects.equals(
                             mFastPairModelId, otherNearbyDeviceParcelable.mFastPairModelId))
                     && (Arrays.equals(mData, otherNearbyDeviceParcelable.mData))
-                    && (Arrays.equals(mSalt, otherNearbyDeviceParcelable.mSalt));
+                    && (Arrays.equals(mSalt, otherNearbyDeviceParcelable.mSalt))
+                    && (Objects.equals(
+                            mPresenceDevice, otherNearbyDeviceParcelable.mPresenceDevice))
+                    && (Arrays.equals(
+                            mEncryptionKeyTag, otherNearbyDeviceParcelable.mEncryptionKeyTag));
         }
         return false;
     }
@@ -227,7 +257,9 @@
                 mBluetoothAddress,
                 mFastPairModelId,
                 Arrays.hashCode(mData),
-                Arrays.hashCode(mSalt));
+                Arrays.hashCode(mSalt),
+                mPresenceDevice,
+                Arrays.hashCode(mEncryptionKeyTag));
     }
 
     /**
@@ -351,6 +383,26 @@
         return mSalt;
     }
 
+    /**
+     * Gets the {@link PresenceDevice} Nearby Presence device. This field is
+     * for Fast Pair client only.
+     */
+    @Nullable
+    public PresenceDevice getPresenceDevice() {
+        return mPresenceDevice;
+    }
+
+    /**
+     * Gets the encryption key tag calculated from advertisement
+     * Returns {@code null} if the data is not encrypted or this is not a Presence device.
+     *
+     * Used in Presence.
+     */
+    @Nullable
+    public byte[] getEncryptionKeyTag() {
+        return mEncryptionKeyTag;
+    }
+
     /** Builder class for {@link NearbyDeviceParcelable}. */
     public static final class Builder {
         @Nullable private String mName;
@@ -364,6 +416,8 @@
         @Nullable private String mBluetoothAddress;
         @Nullable private byte[] mData;
         @Nullable private byte[] mSalt;
+        @Nullable private PresenceDevice mPresenceDevice;
+        @Nullable private byte[] mEncryptionKeyTag;
 
         /**
          * Sets the scan type of the NearbyDeviceParcelable.
@@ -469,7 +523,7 @@
         /**
          * Sets the scanned raw data.
          *
-         * @param data Data the scan. For example, {@link ScanRecord#getServiceData()} if scanned by
+         * @param data raw data scanned, like {@link ScanRecord#getServiceData()} if scanned by
          *             Bluetooth.
          */
         @NonNull
@@ -479,6 +533,17 @@
         }
 
         /**
+         * Sets the encryption key tag calculated from the advertisement.
+         *
+         * @param encryptionKeyTag calculated from identity scanned from the advertisement
+         */
+        @NonNull
+        public Builder setEncryptionKeyTag(@Nullable byte[] encryptionKeyTag) {
+            mEncryptionKeyTag = encryptionKeyTag;
+            return this;
+        }
+
+        /**
          * Sets the slat in the advertisement from the Nearby Presence device.
          *
          * @param salt in the advertisement from the Nearby Presence device.
@@ -489,6 +554,17 @@
             return this;
         }
 
+        /**
+         * Sets the {@link PresenceDevice} if there is any.
+         * The current {@link NearbyDeviceParcelable} can be seen as the wrapper of the
+         * {@link PresenceDevice}.
+         */
+        @Nullable
+        public Builder setPresenceDevice(@Nullable PresenceDevice presenceDevice) {
+            mPresenceDevice = presenceDevice;
+            return this;
+        }
+
         /** Builds a ScanResult. */
         @NonNull
         public NearbyDeviceParcelable build() {
@@ -503,7 +579,9 @@
                     mFastPairModelId,
                     mBluetoothAddress,
                     mData,
-                    mSalt);
+                    mSalt,
+                    mPresenceDevice,
+                    mEncryptionKeyTag);
         }
     }
 }
diff --git a/nearby/framework/java/android/nearby/NearbyManager.java b/nearby/framework/java/android/nearby/NearbyManager.java
index 106c290..6d6b69a 100644
--- a/nearby/framework/java/android/nearby/NearbyManager.java
+++ b/nearby/framework/java/android/nearby/NearbyManager.java
@@ -62,7 +62,7 @@
             ScanStatus.ERROR,
     })
     public @interface ScanStatus {
-        // Default, invalid state.
+        // The undetermined status, some modules may be initializing. Retry is suggested.
         int UNKNOWN = 0;
         // The successful state.
         int SUCCESS = 1;
@@ -103,6 +103,7 @@
         mService = service;
     }
 
+    @Nullable
     private static NearbyDevice toClientNearbyDevice(
             NearbyDeviceParcelable nearbyDeviceParcelable,
             @ScanRequest.ScanType int scanType) {
@@ -118,23 +119,12 @@
         }
 
         if (scanType == ScanRequest.SCAN_TYPE_NEARBY_PRESENCE) {
-            PublicCredential publicCredential = nearbyDeviceParcelable.getPublicCredential();
-            if (publicCredential == null) {
-                return null;
+            PresenceDevice presenceDevice = nearbyDeviceParcelable.getPresenceDevice();
+            if (presenceDevice == null) {
+                Log.e(TAG,
+                        "Cannot find any Presence device in discovered NearbyDeviceParcelable");
             }
-            byte[] salt = nearbyDeviceParcelable.getSalt();
-            if (salt == null) {
-                salt = new byte[0];
-            }
-            return new PresenceDevice.Builder(
-                    // Use the public credential hash as the device Id.
-                    String.valueOf(publicCredential.hashCode()),
-                    salt,
-                    publicCredential.getSecretId(),
-                    publicCredential.getEncryptedMetadata())
-                    .setRssi(nearbyDeviceParcelable.getRssi())
-                    .addMedium(nearbyDeviceParcelable.getMedium())
-                    .build();
+            return presenceDevice;
         }
         return null;
     }
@@ -339,9 +329,9 @@
         public void onDiscovered(NearbyDeviceParcelable nearbyDeviceParcelable)
                 throws RemoteException {
             mExecutor.execute(() -> {
-                if (mScanCallback != null) {
-                    mScanCallback.onDiscovered(
-                            toClientNearbyDevice(nearbyDeviceParcelable, mScanType));
+                NearbyDevice nearbyDevice = toClientNearbyDevice(nearbyDeviceParcelable, mScanType);
+                if (mScanCallback != null && nearbyDevice != null) {
+                    mScanCallback.onDiscovered(nearbyDevice);
                 }
             });
         }
@@ -350,7 +340,8 @@
         public void onUpdated(NearbyDeviceParcelable nearbyDeviceParcelable)
                 throws RemoteException {
             mExecutor.execute(() -> {
-                if (mScanCallback != null) {
+                NearbyDevice nearbyDevice = toClientNearbyDevice(nearbyDeviceParcelable, mScanType);
+                if (mScanCallback != null && nearbyDevice != null) {
                     mScanCallback.onUpdated(
                             toClientNearbyDevice(nearbyDeviceParcelable, mScanType));
                 }
@@ -360,7 +351,8 @@
         @Override
         public void onLost(NearbyDeviceParcelable nearbyDeviceParcelable) throws RemoteException {
             mExecutor.execute(() -> {
-                if (mScanCallback != null) {
+                NearbyDevice nearbyDevice = toClientNearbyDevice(nearbyDeviceParcelable, mScanType);
+                if (mScanCallback != null && nearbyDevice != null) {
                     mScanCallback.onLost(
                             toClientNearbyDevice(nearbyDeviceParcelable, mScanType));
                 }
diff --git a/nearby/framework/java/android/nearby/PresenceDevice.java b/nearby/framework/java/android/nearby/PresenceDevice.java
index cb406e4..7efa5e6 100644
--- a/nearby/framework/java/android/nearby/PresenceDevice.java
+++ b/nearby/framework/java/android/nearby/PresenceDevice.java
@@ -26,6 +26,7 @@
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 import java.util.Objects;
 
@@ -134,6 +135,54 @@
         return mExtendedProperties;
     }
 
+    /**
+     * This can only be hidden because this is the System API,
+     * which cannot be changed in T timeline.
+     *
+     * @hide
+     */
+    @Override
+    public boolean equals(Object other) {
+        if (other instanceof PresenceDevice) {
+            PresenceDevice otherDevice = (PresenceDevice) other;
+            if (super.equals(otherDevice)) {
+                return Arrays.equals(mSalt, otherDevice.mSalt)
+                        && Arrays.equals(mSecretId, otherDevice.mSecretId)
+                        && Arrays.equals(mEncryptedIdentity, otherDevice.mEncryptedIdentity)
+                        && Objects.equals(mDeviceId, otherDevice.mDeviceId)
+                        && mDeviceType == otherDevice.mDeviceType
+                        && Objects.equals(mDeviceImageUrl, otherDevice.mDeviceImageUrl)
+                        && mDiscoveryTimestampMillis == otherDevice.mDiscoveryTimestampMillis
+                        && Objects.equals(mExtendedProperties, otherDevice.mExtendedProperties);
+            }
+        }
+        return false;
+    }
+
+    /**
+     * This can only be hidden because this is the System API,
+     * which cannot be changed in T timeline.
+     *
+     * @hide
+     *
+     * @return The unique hash value of the {@link PresenceDevice}
+     */
+    @Override
+    public int hashCode() {
+        return Objects.hash(
+                getName(),
+                getMediums(),
+                getRssi(),
+                Arrays.hashCode(mSalt),
+                Arrays.hashCode(mSecretId),
+                Arrays.hashCode(mEncryptedIdentity),
+                mDeviceId,
+                mDeviceType,
+                mDeviceImageUrl,
+                mDiscoveryTimestampMillis,
+                mExtendedProperties);
+    }
+
     private PresenceDevice(String deviceName, List<Integer> mMediums, int rssi, String deviceId,
             byte[] salt, byte[] secretId, byte[] encryptedIdentity, int deviceType,
             String deviceImageUrl, long discoveryTimestampMillis,
diff --git a/nearby/framework/java/android/nearby/PresenceScanFilter.java b/nearby/framework/java/android/nearby/PresenceScanFilter.java
index f0c3c06..50e97b4 100644
--- a/nearby/framework/java/android/nearby/PresenceScanFilter.java
+++ b/nearby/framework/java/android/nearby/PresenceScanFilter.java
@@ -71,7 +71,7 @@
         super(ScanRequest.SCAN_TYPE_NEARBY_PRESENCE, rssiThreshold);
         mCredentials = new ArrayList<>(credentials);
         mPresenceActions = new ArrayList<>(presenceActions);
-        mExtendedProperties = extendedProperties;
+        mExtendedProperties = new ArrayList<>(extendedProperties);
     }
 
     private PresenceScanFilter(Parcel in) {
@@ -132,7 +132,7 @@
         }
         dest.writeInt(mExtendedProperties.size());
         if (!mExtendedProperties.isEmpty()) {
-            dest.writeList(mExtendedProperties);
+            dest.writeParcelableList(mExtendedProperties, 0);
         }
     }
 
diff --git a/nearby/framework/java/android/nearby/ScanRequest.java b/nearby/framework/java/android/nearby/ScanRequest.java
index c717ac7..9421820 100644
--- a/nearby/framework/java/android/nearby/ScanRequest.java
+++ b/nearby/framework/java/android/nearby/ScanRequest.java
@@ -62,6 +62,12 @@
      */
     public static final int SCAN_MODE_NO_POWER = -1;
     /**
+     * A special scan mode to indicate that client only wants to use CHRE to scan.
+     *
+     * @hide
+     */
+    public static final int SCAN_MODE_CHRE_ONLY = 3;
+    /**
      * Used to read a ScanRequest from a Parcel.
      */
     @NonNull
diff --git a/nearby/halfsheet/res/values-ky/strings.xml b/nearby/halfsheet/res/values-ky/strings.xml
index 812e0e8..b0dfe20 100644
--- a/nearby/halfsheet/res/values-ky/strings.xml
+++ b/nearby/halfsheet/res/values-ky/strings.xml
@@ -25,5 +25,5 @@
     <string name="paring_action_save" msgid="6259357442067880136">"Сактоо"</string>
     <string name="paring_action_connect" msgid="4801102939608129181">"Туташуу"</string>
     <string name="paring_action_launch" msgid="8940808384126591230">"Жөндөө"</string>
-    <string name="paring_action_settings" msgid="424875657242864302">"Жөндөөлөр"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Параметрлер"</string>
 </resources>
diff --git a/nearby/halfsheet/src/com/android/nearby/halfsheet/HalfSheetActivity.java b/nearby/halfsheet/src/com/android/nearby/halfsheet/HalfSheetActivity.java
index 2a38b8a..07e5776 100644
--- a/nearby/halfsheet/src/com/android/nearby/halfsheet/HalfSheetActivity.java
+++ b/nearby/halfsheet/src/com/android/nearby/halfsheet/HalfSheetActivity.java
@@ -16,6 +16,8 @@
 
 package com.android.nearby.halfsheet;
 
+import static android.Manifest.permission.ACCESS_FINE_LOCATION;
+
 import static com.android.nearby.halfsheet.fragment.DevicePairingFragment.APP_LAUNCH_FRAGMENT_TYPE;
 import static com.android.server.nearby.common.bluetooth.fastpair.FastPairConstants.EXTRA_MODEL_ID;
 import static com.android.server.nearby.common.fastpair.service.UserActionHandlerBase.EXTRA_MAC_ADDRESS;
@@ -226,7 +228,8 @@
                                     EXTRA_HALF_SHEET_IS_RETROACTIVE,
                                     getIntent().getBooleanExtra(EXTRA_HALF_SHEET_IS_RETROACTIVE,
                                             false))
-                            .putExtra(EXTRA_MAC_ADDRESS, mScanFastPairStoreItem.getAddress()));
+                            .putExtra(EXTRA_MAC_ADDRESS, mScanFastPairStoreItem.getAddress()),
+                    ACCESS_FINE_LOCATION);
         }
     }
 
diff --git a/nearby/halfsheet/src/com/android/nearby/halfsheet/utils/BroadcastUtils.java b/nearby/halfsheet/src/com/android/nearby/halfsheet/utils/BroadcastUtils.java
index 467997c..2f1e90a 100644
--- a/nearby/halfsheet/src/com/android/nearby/halfsheet/utils/BroadcastUtils.java
+++ b/nearby/halfsheet/src/com/android/nearby/halfsheet/utils/BroadcastUtils.java
@@ -31,6 +31,13 @@
         context.sendBroadcast(intent);
     }
 
+    /**
+     * Helps send a broadcast with specified receiver permission.
+     */
+    public static void sendBroadcast(Context context, Intent intent, String receiverPermission) {
+        context.sendBroadcast(intent, receiverPermission);
+    }
+
     private BroadcastUtils() {
     }
 }
diff --git a/nearby/service/java/com/android/server/nearby/NearbyService.java b/nearby/service/java/com/android/server/nearby/NearbyService.java
index 5ebf1e5..a1bca19 100644
--- a/nearby/service/java/com/android/server/nearby/NearbyService.java
+++ b/nearby/service/java/com/android/server/nearby/NearbyService.java
@@ -29,6 +29,7 @@
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
+import android.content.pm.PackageManager;
 import android.hardware.location.ContextHubManager;
 import android.nearby.BroadcastRequestParcelable;
 import android.nearby.IBroadcastListener;
@@ -41,8 +42,8 @@
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.server.nearby.common.locator.LocatorContextWrapper;
 import com.android.server.nearby.fastpair.FastPairManager;
-import com.android.server.nearby.injector.ContextHubManagerAdapter;
 import com.android.server.nearby.injector.Injector;
+import com.android.server.nearby.presence.PresenceManager;
 import com.android.server.nearby.provider.BroadcastProviderManager;
 import com.android.server.nearby.provider.DiscoveryProviderManager;
 import com.android.server.nearby.provider.FastPairDataProvider;
@@ -53,10 +54,16 @@
 /** Service implementing nearby functionality. */
 public class NearbyService extends INearbyManager.Stub {
     public static final String TAG = "NearbyService";
+    // Sets to true to start BLE scan from PresenceManager for manual testing.
+    public static final Boolean MANUAL_TEST = false;
+    // Sets to true to support Mainline Test App.
+    // This will disable BLE privilege check and legacy broadcast support check.
+    public static final Boolean SUPPORT_TEST_APP = false;
 
     private final Context mContext;
     private Injector mInjector;
     private final FastPairManager mFastPairManager;
+    private final PresenceManager mPresenceManager;
     private final BroadcastReceiver mBluetoothReceiver =
             new BroadcastReceiver() {
                 @Override
@@ -84,6 +91,7 @@
         mBroadcastProviderManager = new BroadcastProviderManager(context, mInjector);
         final LocatorContextWrapper lcw = new LocatorContextWrapper(context, null);
         mFastPairManager = new FastPairManager(lcw);
+        mPresenceManager = new PresenceManager(lcw);
     }
 
     @VisibleForTesting
@@ -100,10 +108,7 @@
         CallerIdentity identity = CallerIdentity.fromBinder(mContext, packageName, attributionTag);
         DiscoveryPermissions.enforceDiscoveryPermission(mContext, identity);
 
-        if (mProviderManager.registerScanListener(scanRequest, listener, identity)) {
-            return NearbyManager.ScanStatus.SUCCESS;
-        }
-        return NearbyManager.ScanStatus.ERROR;
+        return mProviderManager.registerScanListener(scanRequest, listener, identity);
     }
 
     @Override
@@ -157,16 +162,22 @@
                 FastPairDataProvider.init(mContext);
                 break;
             case PHASE_BOOT_COMPLETED:
+                // mInjector needs to be initialized before mProviderManager.
                 if (mInjector instanceof SystemInjector) {
                     // The nearby service must be functioning after this boot phase.
                     ((SystemInjector) mInjector).initializeBluetoothAdapter();
                     // Initialize ContextManager for CHRE scan.
-                    ((SystemInjector) mInjector).initializeContextHubManagerAdapter();
+                    ((SystemInjector) mInjector).initializeContextHubManager();
                 }
+                mProviderManager.init();
                 mContext.registerReceiver(
                         mBluetoothReceiver,
                         new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED));
                 mFastPairManager.initiate();
+                // Only enable for manual Presence test on device.
+                if (MANUAL_TEST) {
+                    mPresenceManager.initiate();
+                }
                 break;
         }
     }
@@ -178,15 +189,17 @@
      */
     @RequiresPermission(android.Manifest.permission.BLUETOOTH_PRIVILEGED)
     private static void enforceBluetoothPrivilegedPermission(Context context) {
-        context.enforceCallingOrSelfPermission(
-                android.Manifest.permission.BLUETOOTH_PRIVILEGED,
-                "Need BLUETOOTH PRIVILEGED permission");
+        if (!SUPPORT_TEST_APP) {
+            context.enforceCallingOrSelfPermission(
+                    android.Manifest.permission.BLUETOOTH_PRIVILEGED,
+                    "Need BLUETOOTH PRIVILEGED permission");
+        }
     }
 
     private static final class SystemInjector implements Injector {
         private final Context mContext;
         @Nullable private BluetoothAdapter mBluetoothAdapter;
-        @Nullable private ContextHubManagerAdapter mContextHubManagerAdapter;
+        @Nullable private ContextHubManager mContextHubManager;
         @Nullable private AppOpsManager mAppOpsManager;
 
         SystemInjector(Context context) {
@@ -201,8 +214,8 @@
 
         @Override
         @Nullable
-        public ContextHubManagerAdapter getContextHubManagerAdapter() {
-            return mContextHubManagerAdapter;
+        public ContextHubManager getContextHubManager() {
+            return mContextHubManager;
         }
 
         @Override
@@ -222,15 +235,13 @@
             mBluetoothAdapter = manager.getAdapter();
         }
 
-        synchronized void initializeContextHubManagerAdapter() {
-            if (mContextHubManagerAdapter != null) {
+        synchronized void initializeContextHubManager() {
+            if (mContextHubManager != null) {
                 return;
             }
-            ContextHubManager manager = mContext.getSystemService(ContextHubManager.class);
-            if (manager == null) {
-                return;
+            if (mContext.getPackageManager().hasSystemFeature(PackageManager.FEATURE_CONTEXT_HUB)) {
+                mContextHubManager = mContext.getSystemService(ContextHubManager.class);
             }
-            mContextHubManagerAdapter = new ContextHubManagerAdapter(manager);
         }
 
         synchronized void initializeAppOpsManager() {
diff --git a/nearby/service/java/com/android/server/nearby/common/ble/BleFilter.java b/nearby/service/java/com/android/server/nearby/common/ble/BleFilter.java
index 23d5170..dc4e11e 100644
--- a/nearby/service/java/com/android/server/nearby/common/ble/BleFilter.java
+++ b/nearby/service/java/com/android/server/nearby/common/ble/BleFilter.java
@@ -500,16 +500,16 @@
             return false;
         }
         BleFilter other = (BleFilter) obj;
-        return mDeviceName.equals(other.mDeviceName)
-                && mDeviceAddress.equals(other.mDeviceAddress)
+        return equal(mDeviceName, other.mDeviceName)
+                && equal(mDeviceAddress, other.mDeviceAddress)
                 && mManufacturerId == other.mManufacturerId
                 && Arrays.equals(mManufacturerData, other.mManufacturerData)
                 && Arrays.equals(mManufacturerDataMask, other.mManufacturerDataMask)
-                && mServiceDataUuid.equals(other.mServiceDataUuid)
+                && equal(mServiceDataUuid, other.mServiceDataUuid)
                 && Arrays.equals(mServiceData, other.mServiceData)
                 && Arrays.equals(mServiceDataMask, other.mServiceDataMask)
-                && mServiceUuid.equals(other.mServiceUuid)
-                && mServiceUuidMask.equals(other.mServiceUuidMask);
+                && equal(mServiceUuid, other.mServiceUuid)
+                && equal(mServiceUuidMask, other.mServiceUuidMask);
     }
 
     /** Builder class for {@link BleFilter}. */
@@ -743,4 +743,11 @@
         }
         return osFilterBuilder.build();
     }
+
+    /**
+     * equal() method for two possibly-null objects
+     */
+    private static boolean equal(@Nullable Object obj1, @Nullable Object obj2) {
+        return obj1 == obj2 || (obj1 != null && obj1.equals(obj2));
+    }
 }
diff --git a/nearby/service/java/com/android/server/nearby/common/ble/testing/FastPairTestData.java b/nearby/service/java/com/android/server/nearby/common/ble/testing/FastPairTestData.java
index f27899f..b4f46f8 100644
--- a/nearby/service/java/com/android/server/nearby/common/ble/testing/FastPairTestData.java
+++ b/nearby/service/java/com/android/server/nearby/common/ble/testing/FastPairTestData.java
@@ -46,6 +46,12 @@
     /** Model ID in {@link #getFastPairRecord()}. */
     public static final byte[] FAST_PAIR_MODEL_ID = Hex.stringToBytes("AABBCC");
 
+    /** An arbitrary BLE device address. */
+    public static final String DEVICE_ADDRESS = "00:00:00:00:00:01";
+
+    /** Arbitrary RSSI (Received Signal Strength Indicator). */
+    public static final int RSSI = -72;
+
     /** @see #getFastPairRecord() */
     public static byte[] newFastPairRecord(byte header, byte[] modelId) {
         return newFastPairRecord(
@@ -61,6 +67,45 @@
                         Hex.bytesToStringUppercase(serviceData)));
     }
 
+    // This is an example extended inquiry response for a phone with PANU
+    // and Hands-free Audio Gateway
+    public static byte[] eir_1 = {
+            0x06, // Length of this Data
+            0x09, // <<Complete Local Name>>
+            'P',
+            'h',
+            'o',
+            'n',
+            'e',
+            0x05, // Length of this Data
+            0x03, // <<Complete list of 16-bit Service UUIDs>>
+            0x15,
+            0x11, // PANU service class UUID
+            0x1F,
+            0x11, // Hands-free Audio Gateway service class UUID
+            0x01, // Length of this data
+            0x05, // <<Complete list of 32-bit Service UUIDs>>
+            0x11, // Length of this data
+            0x07, // <<Complete list of 128-bit Service UUIDs>>
+            0x01,
+            0x02,
+            0x03,
+            0x04,
+            0x05,
+            0x06,
+            0x07,
+            0x08, // Made up UUID
+            0x11,
+            0x12,
+            0x13,
+            0x14,
+            0x15,
+            0x16,
+            0x17,
+            0x18, //
+            0x00 // End of Data (Not transmitted over the air
+    };
+
     // This is an example of advertising data with AD types
     public static byte[] adv_1 = {
             0x02, // Length of this Data
@@ -138,4 +183,46 @@
             0x00
     };
 
+    // An Eddystone UID frame. go/eddystone for more info
+    public static byte[] eddystone_header_and_uuid = {
+            // BLE Flags
+            (byte) 0x02,
+            (byte) 0x01,
+            (byte) 0x06,
+            // Service UUID
+            (byte) 0x03,
+            (byte) 0x03,
+            (byte) 0xaa,
+            (byte) 0xfe,
+            // Service data header
+            (byte) 0x17,
+            (byte) 0x16,
+            (byte) 0xaa,
+            (byte) 0xfe,
+            // Eddystone frame type
+            (byte) 0x00,
+            // Ranging data
+            (byte) 0xb3,
+            // Eddystone ID namespace
+            (byte) 0x0a,
+            (byte) 0x09,
+            (byte) 0x08,
+            (byte) 0x07,
+            (byte) 0x06,
+            (byte) 0x05,
+            (byte) 0x04,
+            (byte) 0x03,
+            (byte) 0x02,
+            (byte) 0x01,
+            // Eddystone ID instance
+            (byte) 0x16,
+            (byte) 0x15,
+            (byte) 0x14,
+            (byte) 0x13,
+            (byte) 0x12,
+            (byte) 0x11,
+            // RFU
+            (byte) 0x00,
+            (byte) 0x00
+    };
 }
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Bytes.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Bytes.java
index 637cd03..f6e77e6 100644
--- a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Bytes.java
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Bytes.java
@@ -17,6 +17,7 @@
 package com.android.server.nearby.common.bluetooth.fastpair;
 
 import androidx.annotation.Nullable;
+import androidx.annotation.VisibleForTesting;
 
 import java.nio.ByteBuffer;
 import java.nio.ByteOrder;
@@ -51,7 +52,8 @@
             return this.mByteOrder.equals(byteOrder) ? getBytes() : reverse(getBytes());
         }
 
-        private static byte[] reverse(byte[] bytes) {
+        @VisibleForTesting
+        static byte[] reverse(byte[] bytes) {
             byte[] reversedBytes = new byte[bytes.length];
             for (int i = 0; i < bytes.length; i++) {
                 reversedBytes[i] = bytes[bytes.length - i - 1];
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Event.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Event.java
index 0b50dfd..7a0548b 100644
--- a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Event.java
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Event.java
@@ -133,14 +133,11 @@
             Event that = (Event) o;
             return this.mEventCode == that.getEventCode()
                     && this.mTimestamp == that.getTimestamp()
-                    && (this.mProfile == null
-                        ? that.getProfile() == null : this.mProfile.equals(that.getProfile()))
                     && (this.mBluetoothDevice == null
-                        ? that.getBluetoothDevice() == null :
-                            this.mBluetoothDevice.equals(that.getBluetoothDevice()))
-                    && (this.mException == null
-                        ?  that.getException() == null :
-                            this.mException.equals(that.getException()));
+                    ? that.getBluetoothDevice() == null :
+                    this.mBluetoothDevice.equals(that.getBluetoothDevice()))
+                    && (this.mProfile == null
+                    ? that.getProfile() == null : this.mProfile.equals(that.getProfile()));
         }
         return false;
     }
@@ -150,7 +147,6 @@
         return Objects.hash(mEventCode, mTimestamp, mProfile, mBluetoothDevice, mException);
     }
 
-
     /**
      * Builder
      */
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/FastPairDualConnection.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/FastPairDualConnection.java
index 789ef59..60afa31 100644
--- a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/FastPairDualConnection.java
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/FastPairDualConnection.java
@@ -1993,7 +1993,8 @@
         return getLeState(bluetoothAdapter);
     }
 
-    private static int getLeState(android.bluetooth.BluetoothAdapter adapter) {
+    @VisibleForTesting
+    static int getLeState(android.bluetooth.BluetoothAdapter adapter) {
         try {
             return (Integer) Reflect.on(adapter).withMethod("getLeState").get();
         } catch (ReflectionException e) {
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Preferences.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Preferences.java
index bb7b71b..eb5bad5 100644
--- a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Preferences.java
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Preferences.java
@@ -1042,104 +1042,6 @@
      */
     public static Builder builder() {
         return new Preferences.Builder()
-                .setGattOperationTimeoutSeconds(3)
-                .setGattConnectionTimeoutSeconds(15)
-                .setBluetoothToggleTimeoutSeconds(10)
-                .setBluetoothToggleSleepSeconds(2)
-                .setClassicDiscoveryTimeoutSeconds(10)
-                .setNumDiscoverAttempts(3)
-                .setDiscoveryRetrySleepSeconds(1)
-                .setIgnoreDiscoveryError(false)
-                .setSdpTimeoutSeconds(10)
-                .setNumSdpAttempts(3)
-                .setNumCreateBondAttempts(3)
-                .setNumConnectAttempts(1)
-                .setNumWriteAccountKeyAttempts(3)
-                .setToggleBluetoothOnFailure(false)
-                .setBluetoothStateUsesPolling(true)
-                .setBluetoothStatePollingMillis(1000)
-                .setNumAttempts(2)
-                .setEnableBrEdrHandover(false)
-                .setBrHandoverDataCharacteristicId(get16BitUuid(
-                        Constants.TransportDiscoveryService.BrHandoverDataCharacteristic.ID))
-                .setBluetoothSigDataCharacteristicId(get16BitUuid(
-                        Constants.TransportDiscoveryService.BluetoothSigDataCharacteristic.ID))
-                .setFirmwareVersionCharacteristicId(get16BitUuid(FirmwareVersionCharacteristic.ID))
-                .setBrTransportBlockDataDescriptorId(
-                        get16BitUuid(
-                                Constants.TransportDiscoveryService.BluetoothSigDataCharacteristic
-                                        .BrTransportBlockDataDescriptor.ID))
-                .setWaitForUuidsAfterBonding(true)
-                .setReceiveUuidsAndBondedEventBeforeClose(true)
-                .setRemoveBondTimeoutSeconds(5)
-                .setRemoveBondSleepMillis(1000)
-                .setCreateBondTimeoutSeconds(15)
-                .setHidCreateBondTimeoutSeconds(40)
-                .setProxyTimeoutSeconds(2)
-                .setRejectPhonebookAccess(false)
-                .setRejectMessageAccess(false)
-                .setRejectSimAccess(false)
-                .setAcceptPasskey(true)
-                .setSupportedProfileUuids(Constants.getSupportedProfiles())
-                .setWriteAccountKeySleepMillis(2000)
-                .setProviderInitiatesBondingIfSupported(false)
-                .setAttemptDirectConnectionWhenPreviouslyBonded(false)
-                .setAutomaticallyReconnectGattWhenNeeded(false)
-                .setSkipDisconnectingGattBeforeWritingAccountKey(false)
-                .setSkipConnectingProfiles(false)
-                .setIgnoreUuidTimeoutAfterBonded(false)
-                .setSpecifyCreateBondTransportType(false)
-                .setCreateBondTransportType(0 /*BluetoothDevice.TRANSPORT_AUTO*/)
-                .setIncreaseIntentFilterPriority(true)
-                .setEvaluatePerformance(false)
-                .setKeepSameAccountKeyWrite(true)
-                .setEnableNamingCharacteristic(false)
-                .setEnableFirmwareVersionCharacteristic(false)
-                .setIsRetroactivePairing(false)
-                .setNumSdpAttemptsAfterBonded(1)
-                .setSupportHidDevice(false)
-                .setEnablePairingWhileDirectlyConnecting(true)
-                .setAcceptConsentForFastPairOne(true)
-                .setGattConnectRetryTimeoutMillis(0)
-                .setEnable128BitCustomGattCharacteristicsId(true)
-                .setEnableSendExceptionStepToValidator(true)
-                .setEnableAdditionalDataTypeWhenActionOverBle(true)
-                .setCheckBondStateWhenSkipConnectingProfiles(true)
-                .setHandlePasskeyConfirmationByUi(false)
-                .setMoreEventLogForQuality(true)
-                .setRetryGattConnectionAndSecretHandshake(true)
-                .setGattConnectShortTimeoutMs(7000)
-                .setGattConnectLongTimeoutMs(15000)
-                .setGattConnectShortTimeoutRetryMaxSpentTimeMs(10000)
-                .setAddressRotateRetryMaxSpentTimeMs(15000)
-                .setPairingRetryDelayMs(100)
-                .setSecretHandshakeShortTimeoutMs(3000)
-                .setSecretHandshakeLongTimeoutMs(10000)
-                .setSecretHandshakeShortTimeoutRetryMaxSpentTimeMs(5000)
-                .setSecretHandshakeLongTimeoutRetryMaxSpentTimeMs(7000)
-                .setSecretHandshakeRetryAttempts(3)
-                .setSecretHandshakeRetryGattConnectionMaxSpentTimeMs(15000)
-                .setSignalLostRetryMaxSpentTimeMs(15000)
-                .setGattConnectionAndSecretHandshakeNoRetryGattError(ImmutableSet.of())
-                .setRetrySecretHandshakeTimeout(false)
-                .setLogUserManualRetry(true)
-                .setPairFailureCounts(0)
-                .setEnablePairFlowShowUiWithoutProfileConnection(true)
-                .setPairFailureCounts(0)
-                .setLogPairWithCachedModelId(true)
-                .setDirectConnectProfileIfModelIdInCache(false)
-                .setCachedDeviceAddress("")
-                .setPossibleCachedDeviceAddress("")
-                .setSameModelIdPairedDeviceCount(0)
-                .setIsDeviceFinishCheckAddressFromCache(true);
-    }
-
-    /**
-     * Constructs a builder from GmsLog.
-     */
-    // TODO(b/206668142): remove this builder once api is ready.
-    public static Builder builderFromGmsLog() {
-        return new Preferences.Builder()
                 .setGattOperationTimeoutSeconds(10)
                 .setGattConnectionTimeoutSeconds(15)
                 .setBluetoothToggleTimeoutSeconds(10)
@@ -1158,10 +1060,15 @@
                 .setBluetoothStatePollingMillis(1000)
                 .setNumAttempts(2)
                 .setEnableBrEdrHandover(false)
-                .setBrHandoverDataCharacteristicId((short) 11265)
-                .setBluetoothSigDataCharacteristicId((short) 11266)
-                .setFirmwareVersionCharacteristicId((short) 10790)
-                .setBrTransportBlockDataDescriptorId((short) 11267)
+                .setBrHandoverDataCharacteristicId(get16BitUuid(
+                        Constants.TransportDiscoveryService.BrHandoverDataCharacteristic.ID))
+                .setBluetoothSigDataCharacteristicId(get16BitUuid(
+                        Constants.TransportDiscoveryService.BluetoothSigDataCharacteristic.ID))
+                .setFirmwareVersionCharacteristicId(get16BitUuid(FirmwareVersionCharacteristic.ID))
+                .setBrTransportBlockDataDescriptorId(
+                        get16BitUuid(
+                                Constants.TransportDiscoveryService.BluetoothSigDataCharacteristic
+                                        .BrTransportBlockDataDescriptor.ID))
                 .setWaitForUuidsAfterBonding(true)
                 .setReceiveUuidsAndBondedEventBeforeClose(true)
                 .setRemoveBondTimeoutSeconds(5)
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothDevice.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothDevice.java
index 5b45f61..b2002c5 100644
--- a/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothDevice.java
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothDevice.java
@@ -187,12 +187,6 @@
         return mWrappedBluetoothDevice.createInsecureRfcommSocketToServiceRecord(uuid);
     }
 
-    /** See {@link android.bluetooth.BluetoothDevice#setPin(byte[])}. */
-    @TargetApi(19)
-    public boolean setPairingConfirmation(byte[] pin) {
-        return mWrappedBluetoothDevice.setPin(pin);
-    }
-
     /** See {@link android.bluetooth.BluetoothDevice#setPairingConfirmation(boolean)}. */
     public boolean setPairingConfirmation(boolean confirm) {
         return mWrappedBluetoothDevice.setPairingConfirmation(confirm);
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattServer.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattServer.java
index 3f6f361..d4873fd 100644
--- a/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattServer.java
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattServer.java
@@ -51,6 +51,11 @@
         return new BluetoothGattServer(instance);
     }
 
+    /** Unwraps a Bluetooth Gatt server. */
+    public android.bluetooth.BluetoothGattServer unwrap() {
+        return mWrappedInstance;
+    }
+
     /**
      * See {@link android.bluetooth.BluetoothGattServer#connect(
      * android.bluetooth.BluetoothDevice, boolean)}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/BluetoothLeAdvertiser.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/BluetoothLeAdvertiser.java
index 6fe4432..b2c61ab 100644
--- a/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/BluetoothLeAdvertiser.java
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/BluetoothLeAdvertiser.java
@@ -71,4 +71,10 @@
         }
         return new BluetoothLeAdvertiser(bluetoothLeAdvertiser);
     }
+
+    /** Unwraps a Bluetooth LE advertiser. */
+    @Nullable
+    public android.bluetooth.le.BluetoothLeAdvertiser unwrap() {
+        return mWrappedInstance;
+    }
 }
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/BluetoothLeScanner.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/BluetoothLeScanner.java
index 8a13abe..9b3447e 100644
--- a/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/BluetoothLeScanner.java
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/BluetoothLeScanner.java
@@ -77,6 +77,12 @@
         mWrappedBluetoothLeScanner.stopScan(callbackIntent);
     }
 
+    /** Unwraps a Bluetooth LE scanner. */
+    @Nullable
+    public android.bluetooth.le.BluetoothLeScanner unwrap() {
+        return mWrappedBluetoothLeScanner;
+    }
+
     /** Wraps a Bluetooth LE scanner. */
     @Nullable
     public static BluetoothLeScanner wrap(
diff --git a/nearby/service/java/com/android/server/nearby/common/locator/Locator.java b/nearby/service/java/com/android/server/nearby/common/locator/Locator.java
index f8b43a6..2003335 100644
--- a/nearby/service/java/com/android/server/nearby/common/locator/Locator.java
+++ b/nearby/service/java/com/android/server/nearby/common/locator/Locator.java
@@ -110,7 +110,8 @@
         throw new IllegalStateException(errorMessage);
     }
 
-    private String getUnboundErrorMessage(Class<?> type) {
+    @VisibleForTesting
+    String getUnboundErrorMessage(Class<?> type) {
         StringBuilder sb = new StringBuilder();
         sb.append("Unbound type: ").append(type.getName()).append("\n").append(
                 "Searched locators:\n");
diff --git a/nearby/service/java/com/android/server/nearby/fastpair/FastPairAdvHandler.java b/nearby/service/java/com/android/server/nearby/fastpair/FastPairAdvHandler.java
index 2ecce47..d459329 100644
--- a/nearby/service/java/com/android/server/nearby/fastpair/FastPairAdvHandler.java
+++ b/nearby/service/java/com/android/server/nearby/fastpair/FastPairAdvHandler.java
@@ -31,10 +31,7 @@
 import com.android.server.nearby.common.ble.decode.FastPairDecoder;
 import com.android.server.nearby.common.ble.util.RangingUtils;
 import com.android.server.nearby.common.bloomfilter.BloomFilter;
-import com.android.server.nearby.common.bloomfilter.FastPairBloomFilterHasher;
 import com.android.server.nearby.common.locator.Locator;
-import com.android.server.nearby.fastpair.cache.DiscoveryItem;
-import com.android.server.nearby.fastpair.cache.FastPairCacheManager;
 import com.android.server.nearby.fastpair.halfsheet.FastPairHalfSheetManager;
 import com.android.server.nearby.provider.FastPairDataProvider;
 import com.android.server.nearby.util.DataUtils;
@@ -120,7 +117,7 @@
                 Log.e(TAG, "OEM does not construct fast pair data proxy correctly");
             }
         } else {
-            // Start to process bloom filter
+            // Start to process bloom filter. Yet to finish.
             try {
                 List<Account> accountList = mPairDataProvider.loadFastPairEligibleAccounts();
                 byte[] bloomFilterByteArray = FastPairDecoder
@@ -130,73 +127,9 @@
                 if (bloomFilterByteArray == null || bloomFilterByteArray.length == 0) {
                     return;
                 }
-                for (Account account : accountList) {
-                    List<Data.FastPairDeviceWithAccountKey> listDevices =
-                            mPairDataProvider.loadFastPairDeviceWithAccountKey(account);
-                    Data.FastPairDeviceWithAccountKey recognizedDevice =
-                            findRecognizedDevice(listDevices,
-                                    new BloomFilter(bloomFilterByteArray,
-                                            new FastPairBloomFilterHasher()), bloomFilterSalt);
-
-                    if (recognizedDevice != null) {
-                        Log.d(TAG, "find matched device show notification to remind"
-                                + " user to pair");
-                        // Check the distance of the device if the distance is larger than the
-                        // threshold
-                        // do not show half sheet.
-                        if (!isNearby(fastPairDevice.getRssi(),
-                                recognizedDevice.getDiscoveryItem().getTxPower() == 0
-                                        ? fastPairDevice.getTxPower()
-                                        : recognizedDevice.getDiscoveryItem().getTxPower())) {
-                            return;
-                        }
-                        // Check if the device is already paired
-                        List<Cache.StoredFastPairItem> storedFastPairItemList =
-                                Locator.get(mContext, FastPairCacheManager.class)
-                                        .getAllSavedStoredFastPairItem();
-                        Cache.StoredFastPairItem recognizedStoredFastPairItem =
-                                findRecognizedDeviceFromCachedItem(storedFastPairItemList,
-                                        new BloomFilter(bloomFilterByteArray,
-                                                new FastPairBloomFilterHasher()), bloomFilterSalt);
-                        if (recognizedStoredFastPairItem != null) {
-                            // The bloomfilter is recognized in the cache so the device is paired
-                            // before
-                            Log.d(TAG, "bloom filter is recognized in the cache");
-                            continue;
-                        } else {
-                            Log.d(TAG, "bloom filter is recognized not paired before should"
-                                    + "show subsequent pairing notification");
-                            if (mIsFirst) {
-                                mIsFirst = false;
-                                // Get full info from api the initial request will only return
-                                // part of the info due to size limit.
-                                List<Data.FastPairDeviceWithAccountKey> resList =
-                                        mPairDataProvider.loadFastPairDeviceWithAccountKey(account,
-                                                List.of(recognizedDevice.getAccountKey()
-                                                        .toByteArray()));
-                                if (resList != null && resList.size() > 0) {
-                                    //Saved device from footprint does not have ble address so
-                                    // fill ble address with current scan result.
-                                    Cache.StoredDiscoveryItem storedDiscoveryItem =
-                                            resList.get(0).getDiscoveryItem().toBuilder()
-                                                    .setMacAddress(
-                                                            fastPairDevice.getBluetoothAddress())
-                                                    .build();
-                                    Locator.get(mContext, FastPairController.class).pair(
-                                            new DiscoveryItem(mContext, storedDiscoveryItem),
-                                            resList.get(0).getAccountKey().toByteArray(),
-                                            /** companionApp=*/null);
-                                }
-                            }
-                        }
-
-                        return;
-                    }
-                }
             } catch (IllegalStateException e) {
                 Log.e(TAG, "OEM does not construct fast pair data proxy correctly");
             }
-
         }
     }
 
@@ -249,5 +182,4 @@
     boolean isNearby(int rssi, int txPower) {
         return RangingUtils.distanceFromRssiAndTxPower(rssi, txPower) < NEARBY_DISTANCE_THRESHOLD;
     }
-
 }
diff --git a/nearby/service/java/com/android/server/nearby/fastpair/FastPairManager.java b/nearby/service/java/com/android/server/nearby/fastpair/FastPairManager.java
index f368080..e3de4e2 100644
--- a/nearby/service/java/com/android/server/nearby/fastpair/FastPairManager.java
+++ b/nearby/service/java/com/android/server/nearby/fastpair/FastPairManager.java
@@ -242,7 +242,7 @@
 
             String modelId = item.getTriggerId();
             Preferences.Builder prefsBuilder =
-                    Preferences.builderFromGmsLog()
+                    Preferences.builder()
                             .setEnableBrEdrHandover(false)
                             .setIgnoreDiscoveryError(true);
             pairingProgressHandlerBase.onSetupPreferencesBuilder(prefsBuilder);
diff --git a/nearby/service/java/com/android/server/nearby/fastpair/cache/DiscoveryItem.java b/nearby/service/java/com/android/server/nearby/fastpair/cache/DiscoveryItem.java
index 6065f99..5ce4488 100644
--- a/nearby/service/java/com/android/server/nearby/fastpair/cache/DiscoveryItem.java
+++ b/nearby/service/java/com/android/server/nearby/fastpair/cache/DiscoveryItem.java
@@ -28,6 +28,7 @@
 import android.text.TextUtils;
 import android.util.Log;
 
+import com.android.internal.annotations.VisibleForTesting;
 import com.android.server.nearby.common.ble.util.RangingUtils;
 import com.android.server.nearby.common.fastpair.IconUtils;
 import com.android.server.nearby.common.locator.Locator;
@@ -106,15 +107,6 @@
     }
 
     /**
-     * Sets the store discovery item mac address.
-     */
-    public void setMacAddress(String address) {
-        mStoredDiscoveryItem = mStoredDiscoveryItem.toBuilder().setMacAddress(address).build();
-
-        mFastPairCacheManager.saveDiscoveryItem(this);
-    }
-
-    /**
      * Checks if the item is expired. Expired items are those over getItemExpirationMillis() eg. 2
      * minutes
      */
@@ -295,7 +287,8 @@
      * Returns the app name of discovery item.
      */
     @Nullable
-    private String getAppName() {
+    @VisibleForTesting
+    protected String getAppName() {
         return mStoredDiscoveryItem.getAppName();
     }
 
diff --git a/nearby/service/java/com/android/server/nearby/fastpair/cache/FastPairCacheManager.java b/nearby/service/java/com/android/server/nearby/fastpair/cache/FastPairCacheManager.java
index b840091..c6134f5 100644
--- a/nearby/service/java/com/android/server/nearby/fastpair/cache/FastPairCacheManager.java
+++ b/nearby/service/java/com/android/server/nearby/fastpair/cache/FastPairCacheManager.java
@@ -64,16 +64,6 @@
     }
 
     /**
-     * Checks if the entry can be auto deleted from the cache
-     */
-    public boolean isDeletable(Cache.ServerResponseDbItem entry) {
-        if (!entry.getExpirable()) {
-            return false;
-        }
-        return true;
-    }
-
-    /**
      * Save discovery item into database. Discovery item is item that discovered through Ble before
      * pairing success.
      */
diff --git a/nearby/service/java/com/android/server/nearby/fastpair/pairinghandler/PairingProgressHandlerBase.java b/nearby/service/java/com/android/server/nearby/fastpair/pairinghandler/PairingProgressHandlerBase.java
index ccd7e5e..5fb05d5 100644
--- a/nearby/service/java/com/android/server/nearby/fastpair/pairinghandler/PairingProgressHandlerBase.java
+++ b/nearby/service/java/com/android/server/nearby/fastpair/pairinghandler/PairingProgressHandlerBase.java
@@ -24,6 +24,7 @@
 import android.content.Context;
 import android.util.Log;
 
+import com.android.internal.annotations.VisibleForTesting;
 import com.android.server.nearby.common.bluetooth.fastpair.FastPairConnection;
 import com.android.server.nearby.common.bluetooth.fastpair.Preferences;
 import com.android.server.nearby.fastpair.cache.DiscoveryItem;
@@ -184,7 +185,8 @@
                 + maskBluetoothAddress(address));
     }
 
-    private static void optInFootprintsForInitialPairing(
+    @VisibleForTesting
+    static void optInFootprintsForInitialPairing(
             FootprintsDeviceManager footprints,
             DiscoveryItem item,
             byte[] accountKey,
diff --git a/nearby/service/java/com/android/server/nearby/injector/Injector.java b/nearby/service/java/com/android/server/nearby/injector/Injector.java
index 57784a9..3152ee6 100644
--- a/nearby/service/java/com/android/server/nearby/injector/Injector.java
+++ b/nearby/service/java/com/android/server/nearby/injector/Injector.java
@@ -18,6 +18,7 @@
 
 import android.app.AppOpsManager;
 import android.bluetooth.BluetoothAdapter;
+import android.hardware.location.ContextHubManager;
 
 /**
  * Nearby dependency injector. To be used for accessing various Nearby class instances and as a
@@ -29,7 +30,7 @@
     BluetoothAdapter getBluetoothAdapter();
 
     /** Get the ContextHubManagerAdapter for ChreDiscoveryProvider to scan. */
-    ContextHubManagerAdapter getContextHubManagerAdapter();
+    ContextHubManager getContextHubManager();
 
     /** Get the AppOpsManager to control access. */
     AppOpsManager getAppOpsManager();
diff --git a/nearby/service/java/com/android/server/nearby/presence/Advertisement.java b/nearby/service/java/com/android/server/nearby/presence/Advertisement.java
new file mode 100644
index 0000000..d42f6c7
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/presence/Advertisement.java
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.presence;
+
+import android.annotation.Nullable;
+import android.nearby.BroadcastRequest;
+import android.nearby.PresenceCredential;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/** A Nearby Presence advertisement to be advertised. */
+public abstract class Advertisement {
+
+    @BroadcastRequest.BroadcastVersion
+    int mVersion = BroadcastRequest.PRESENCE_VERSION_UNKNOWN;
+    int mLength;
+    @PresenceCredential.IdentityType int mIdentityType;
+    byte[] mIdentity;
+    byte[] mSalt;
+    List<Integer> mActions;
+
+    /** Serialize an {@link Advertisement} object into bytes. */
+    @Nullable
+    public byte[] toBytes() {
+        return new byte[0];
+    }
+
+    /** Returns the length of the advertisement. */
+    public int getLength() {
+        return mLength;
+    }
+
+    /** Returns the version in the advertisement. */
+    @BroadcastRequest.BroadcastVersion
+    public int getVersion() {
+        return mVersion;
+    }
+
+    /** Returns the identity type in the advertisement. */
+    @PresenceCredential.IdentityType
+    public int getIdentityType() {
+        return mIdentityType;
+    }
+
+    /** Returns the identity bytes in the advertisement. */
+    public byte[] getIdentity() {
+        return mIdentity.clone();
+    }
+
+    /** Returns the salt of the advertisement. */
+    public byte[] getSalt() {
+        return mSalt.clone();
+    }
+
+    /** Returns the actions in the advertisement. */
+    public List<Integer> getActions() {
+        return new ArrayList<>(mActions);
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/presence/DataElementHeader.java b/nearby/service/java/com/android/server/nearby/presence/DataElementHeader.java
new file mode 100644
index 0000000..ae4a728
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/presence/DataElementHeader.java
@@ -0,0 +1,266 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.presence;
+
+import android.annotation.Nullable;
+import android.nearby.BroadcastRequest;
+import android.nearby.DataElement;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.internal.util.Preconditions;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
+
+import javax.annotation.Nonnull;
+
+/**
+ * Represents a data element header in Nearby Presence.
+ * Each header has 3 parts: tag, length and style.
+ * Tag: 1 bit (MSB at each byte). 1 for extending, which means there will be more bytes after
+ * the current one for the header.
+ * Length: The total length of a Data Element field. Length is up to 127 and is limited within
+ * the entire first byte in the header. (7 bits, MSB is the tag).
+ * Type: Represents {@link DataElement.DataType}. There is no limit for the type number.
+ *
+ * @hide
+ */
+public class DataElementHeader {
+    // Each Data reserved MSB for tag.
+    static final int TAG_BITMASK = 0b10000000;
+    static final int TAG_OFFSET = 7;
+
+    // If the header is only 1 byte, it has the format: 0b0LLLTTTT. (L for length, T for type.)
+    static final int SINGLE_AVAILABLE_LENGTH_BIT = 3;
+    static final int SINGLE_AVAILABLE_TYPE_BIT = 4;
+    static final int SINGLE_LENGTH_BITMASK = 0b01110000;
+    static final int SINGLE_LENGTH_OFFSET = SINGLE_AVAILABLE_TYPE_BIT;
+    static final int SINGLE_TYPE_BITMASK = 0b00001111;
+
+    // If there are multiple data element headers.
+    // First byte is always the length.
+    static final int MULTIPLE_LENGTH_BYTE = 1;
+    // Each byte reserves MSB for tag.
+    static final int MULTIPLE_BITMASK = 0b01111111;
+
+    @BroadcastRequest.BroadcastVersion
+    private final int mVersion;
+    @DataElement.DataType
+    private final int mDataType;
+    private final int mDataLength;
+
+    DataElementHeader(@BroadcastRequest.BroadcastVersion int version,
+            @DataElement.DataType int dataType, int dataLength) {
+        Preconditions.checkArgument(version == BroadcastRequest.PRESENCE_VERSION_V1,
+                "DataElementHeader is only supported in V1.");
+        Preconditions.checkArgument(dataLength >= 0, "Length should not be negative.");
+        Preconditions.checkArgument(dataLength < (1 << TAG_OFFSET),
+                "Data element should be equal or shorter than 128.");
+
+        this.mVersion = version;
+        this.mDataType = dataType;
+        this.mDataLength = dataLength;
+    }
+
+    /**
+     * The total type of the data element.
+     */
+    @DataElement.DataType
+    public int getDataType() {
+        return mDataType;
+    }
+
+    /**
+     * The total length of a Data Element field.
+     */
+    public int getDataLength() {
+        return mDataLength;
+    }
+
+    /** Serialize a {@link DataElementHeader} object into bytes. */
+    public byte[] toBytes() {
+        Preconditions.checkState(mVersion == BroadcastRequest.PRESENCE_VERSION_V1,
+                "DataElementHeader is only supported in V1.");
+        // Only 1 byte needed for the header
+        if (mDataType < (1 << SINGLE_AVAILABLE_TYPE_BIT)
+                && mDataLength < (1 << SINGLE_AVAILABLE_LENGTH_BIT)) {
+            return new byte[]{createSingleByteHeader(mDataType, mDataLength)};
+        }
+
+        return createMultipleBytesHeader(mDataType, mDataLength);
+    }
+
+    /** Creates a {@link DataElementHeader} object from bytes. */
+    @Nullable
+    public static DataElementHeader fromBytes(@BroadcastRequest.BroadcastVersion int version,
+            @Nonnull byte[] bytes) {
+        Objects.requireNonNull(bytes, "Data parsed in for DataElement should not be null.");
+
+        if (bytes.length == 0) {
+            return null;
+        }
+
+        if (bytes.length == 1) {
+            if (isExtending(bytes[0])) {
+                throw new IllegalArgumentException("The header is not complete.");
+            }
+            return new DataElementHeader(BroadcastRequest.PRESENCE_VERSION_V1,
+                    getTypeSingleByte(bytes[0]), getLengthSingleByte(bytes[0]));
+        }
+
+        // The first byte should be length and there should be at least 1 more byte following to
+        // represent type.
+        // The last header byte's MSB should be 0.
+        if (!isExtending(bytes[0]) || isExtending(bytes[bytes.length - 1])) {
+            throw new IllegalArgumentException("The header format is wrong.");
+        }
+
+        return new DataElementHeader(version,
+                getTypeMultipleBytes(Arrays.copyOfRange(bytes, 1, bytes.length)),
+                getHeaderValue(bytes[0]));
+    }
+
+    /** Creates a header based on type and length.
+     * This is used when the type is <= 16 and length is <= 7. */
+    static byte createSingleByteHeader(int type, int length) {
+        return (byte) (convertTag(/* extend= */ false)
+                | convertLengthSingleByte(length)
+                | convertTypeSingleByte(type));
+    }
+
+    /** Creates a header based on type and length.
+     * This is used when the type is > 16 or length is > 7. */
+    static byte[] createMultipleBytesHeader(int type, int length) {
+        List<Byte> typeIntList = convertTypeMultipleBytes(type);
+        byte[] res = new byte[typeIntList.size() + MULTIPLE_LENGTH_BYTE];
+        int index = 0;
+        res[index++] = convertLengthMultipleBytes(length);
+
+        for (int typeInt : typeIntList) {
+            res[index++] = (byte) typeInt;
+        }
+        return res;
+    }
+
+    /** Constructs a Data Element header with length indicated in byte format.
+     * The most significant bit is the tag, 2- 4 bits are the length, 5 - 8 bits are the type.
+     */
+    @VisibleForTesting
+    static int convertLengthSingleByte(int length) {
+        Preconditions.checkArgument(length >= 0, "Length should not be negative.");
+        Preconditions.checkArgument(length < (1 << SINGLE_AVAILABLE_LENGTH_BIT),
+                "In single Data Element header, length should be shorter than 8.");
+        return (length << SINGLE_LENGTH_OFFSET) & SINGLE_LENGTH_BITMASK;
+    }
+
+    /** Constructs a Data Element header with type indicated in byte format.
+     * The most significant bit is the tag, 2- 4 bits are the length, 5 - 8 bits are the type.
+     */
+    @VisibleForTesting
+    static int convertTypeSingleByte(int type) {
+        Preconditions.checkArgument(type >= 0, "Type should not be negative.");
+        Preconditions.checkArgument(type < (1 << SINGLE_AVAILABLE_TYPE_BIT),
+                "In single Data Element header, type should be smaller than 16.");
+
+        return type & SINGLE_TYPE_BITMASK;
+    }
+
+    /**
+     * Gets the length of Data Element from the header. (When there is only 1 byte of header)
+     */
+    static int getLengthSingleByte(byte header) {
+        Preconditions.checkArgument(!isExtending(header),
+                "Cannot apply this method for the extending header.");
+        return (header & SINGLE_LENGTH_BITMASK) >> SINGLE_LENGTH_OFFSET;
+    }
+
+    /**
+     * Gets the type of Data Element from the header. (When there is only 1 byte of header)
+     */
+    static int getTypeSingleByte(byte header) {
+        Preconditions.checkArgument(!isExtending(header),
+                "Cannot apply this method for the extending header.");
+        return header & SINGLE_TYPE_BITMASK;
+    }
+
+    /** Creates a DE(data element) header based on length.
+     * This is used when header is more than 1 byte. The first byte is always the length.
+     */
+    static byte convertLengthMultipleBytes(int length) {
+        Preconditions.checkArgument(length < (1 << TAG_OFFSET),
+                "Data element should be equal or shorter than 128.");
+        return (byte) (convertTag(/* extend= */ true) | (length & MULTIPLE_BITMASK));
+    }
+
+    /** Creates a DE(data element) header based on type.
+     * This is used when header is more than 1 byte. The first byte is always the length.
+     */
+    @VisibleForTesting
+    static List<Byte> convertTypeMultipleBytes(int type) {
+        List<Byte> typeBytes = new ArrayList<>();
+        while (type > 0) {
+            byte current = (byte) (type & MULTIPLE_BITMASK);
+            type = type >> TAG_OFFSET;
+            typeBytes.add(current);
+        }
+
+        Collections.reverse(typeBytes);
+        int size = typeBytes.size();
+        // The last byte's MSB should be 0.
+        for (int i = 0; i < size - 1; i++) {
+            typeBytes.set(i, (byte) (convertTag(/* extend= */ true) | typeBytes.get(i)));
+        }
+        return typeBytes;
+    }
+
+    /** Creates a DE(data element) header based on type.
+     * This is used when header is more than 1 byte. The first byte is always the length.
+     * Uses Integer when doing bit operation to avoid error.
+     */
+    @VisibleForTesting
+    static int getTypeMultipleBytes(byte[] typeByteArray) {
+        int type = 0;
+        int size = typeByteArray.length;
+        for (int i = 0; i < size; i++) {
+            type = (type << TAG_OFFSET) | getHeaderValue(typeByteArray[i]);
+        }
+        return type;
+    }
+
+    /** Gets the integer value of the 7 bits in the header. (The MSB is tag) */
+    @VisibleForTesting
+    static int getHeaderValue(byte header) {
+        return (header & MULTIPLE_BITMASK);
+    }
+
+    /** Sets the MSB of the header byte. If this is the last byte of headers, MSB is 0.
+     * If there are at least header following, the MSB is 1.
+     */
+    @VisibleForTesting
+    static byte convertTag(boolean extend) {
+        return (byte) (extend ? 0b10000000 : 0b00000000);
+    }
+
+    /** Returns {@code true} if there are at least 1 byte of header after the current one. */
+    @VisibleForTesting
+    static boolean isExtending(byte header) {
+        return (header & TAG_BITMASK) != 0;
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/presence/ExtendedAdvertisement.java b/nearby/service/java/com/android/server/nearby/presence/ExtendedAdvertisement.java
new file mode 100644
index 0000000..34a7514
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/presence/ExtendedAdvertisement.java
@@ -0,0 +1,409 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.presence;
+
+import static com.android.server.nearby.NearbyService.TAG;
+
+import android.annotation.Nullable;
+import android.nearby.BroadcastRequest;
+import android.nearby.DataElement;
+import android.nearby.PresenceBroadcastRequest;
+import android.nearby.PresenceCredential;
+import android.nearby.PublicCredential;
+import android.util.Log;
+
+import com.android.server.nearby.util.encryption.Cryptor;
+import com.android.server.nearby.util.encryption.CryptorImpFake;
+import com.android.server.nearby.util.encryption.CryptorImpIdentityV1;
+import com.android.server.nearby.util.encryption.CryptorImpV1;
+
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * A Nearby Presence advertisement to be advertised on BT5.0 devices.
+ *
+ * <p>Serializable between Java object and bytes formats. Java object is used at the upper scanning
+ * and advertising interface as an abstraction of the actual bytes. Bytes format is used at the
+ * underlying BLE and mDNS stacks, which do necessary slicing and merging based on advertising
+ * capacities.
+ *
+ * The extended advertisement is defined in the format below:
+ * Header (1 byte) | salt (1+2 bytes) | Identity + filter (2+16 bytes)
+ * | repeated DE fields (various bytes)
+ * The header contains:
+ * version (3 bits) | 5 bit reserved for future use (RFU)
+ */
+public class ExtendedAdvertisement extends Advertisement{
+
+    public static final int SALT_DATA_LENGTH = 2;
+
+    static final int HEADER_LENGTH = 1;
+
+    static final int IDENTITY_DATA_LENGTH = 16;
+
+    private final List<DataElement> mDataElements;
+
+    private final byte[] mAuthenticityKey;
+
+    // All Data Elements including salt and identity.
+    // Each list item (byte array) is a Data Element (with its header).
+    private final List<byte[]> mCompleteDataElementsBytes;
+    // Signature generated from data elements.
+    private final byte[] mHmacTag;
+
+    /**
+     * Creates an {@link ExtendedAdvertisement} from a Presence Broadcast Request.
+     * @return {@link ExtendedAdvertisement} object. {@code null} when the request is illegal.
+     */
+    @Nullable
+    public static ExtendedAdvertisement createFromRequest(PresenceBroadcastRequest request) {
+        if (request.getVersion() != BroadcastRequest.PRESENCE_VERSION_V1) {
+            Log.v(TAG, "ExtendedAdvertisement only supports V1 now.");
+            return null;
+        }
+
+        byte[] salt = request.getSalt();
+        if (salt.length != SALT_DATA_LENGTH) {
+            Log.v(TAG, "Salt does not match correct length");
+            return null;
+        }
+
+        byte[] identity = request.getCredential().getMetadataEncryptionKey();
+        byte[] authenticityKey = request.getCredential().getAuthenticityKey();
+        if (identity.length != IDENTITY_DATA_LENGTH) {
+            Log.v(TAG, "Identity does not match correct length");
+            return null;
+        }
+
+        List<Integer> actions = request.getActions();
+        if (actions.isEmpty()) {
+            Log.v(TAG, "ExtendedAdvertisement must contain at least one action");
+            return null;
+        }
+
+        List<DataElement> dataElements = request.getExtendedProperties();
+        return new ExtendedAdvertisement(
+                request.getCredential().getIdentityType(),
+                identity,
+                salt,
+                authenticityKey,
+                actions,
+                dataElements);
+    }
+
+    /** Serialize an {@link ExtendedAdvertisement} object into bytes with {@link DataElement}s */
+    @Nullable
+    public byte[] toBytes() {
+        ByteBuffer buffer = ByteBuffer.allocate(getLength());
+
+        // Header
+        buffer.put(ExtendedAdvertisementUtils.constructHeader(getVersion()));
+
+        // Salt
+        buffer.put(mCompleteDataElementsBytes.get(0));
+
+        // Identity
+        buffer.put(mCompleteDataElementsBytes.get(1));
+
+        List<Byte> rawDataBytes = new ArrayList<>();
+        // Data Elements (Already includes salt and identity)
+        for (int i = 2; i < mCompleteDataElementsBytes.size(); i++) {
+            byte[] dataElementBytes = mCompleteDataElementsBytes.get(i);
+            for (Byte b : dataElementBytes) {
+                rawDataBytes.add(b);
+            }
+        }
+
+        byte[] dataElements = new byte[rawDataBytes.size()];
+        for (int i = 0; i < rawDataBytes.size(); i++) {
+            dataElements[i] = rawDataBytes.get(i);
+        }
+
+        buffer.put(
+                getCryptor(/* encrypt= */ true).encrypt(dataElements, getSalt(), mAuthenticityKey));
+
+        buffer.put(mHmacTag);
+
+        return buffer.array();
+    }
+
+    /** Deserialize from bytes into an {@link ExtendedAdvertisement} object.
+     * {@code null} when there is something when parsing.
+     */
+    @Nullable
+    public static ExtendedAdvertisement fromBytes(byte[] bytes, PublicCredential publicCredential) {
+        @BroadcastRequest.BroadcastVersion
+        int version = ExtendedAdvertisementUtils.getVersion(bytes);
+        if (version != PresenceBroadcastRequest.PRESENCE_VERSION_V1) {
+            Log.v(TAG, "ExtendedAdvertisement is used in V1 only and version is " + version);
+            return null;
+        }
+
+        byte[] authenticityKey = publicCredential.getAuthenticityKey();
+
+        int index = HEADER_LENGTH;
+        // Salt
+        byte[] saltHeaderArray = ExtendedAdvertisementUtils.getDataElementHeader(bytes, index);
+        DataElementHeader saltHeader = DataElementHeader.fromBytes(version, saltHeaderArray);
+        if (saltHeader == null || saltHeader.getDataType() != DataElement.DataType.SALT) {
+            Log.v(TAG, "First data element has to be salt.");
+            return null;
+        }
+        index += saltHeaderArray.length;
+        byte[] salt = new byte[saltHeader.getDataLength()];
+        for (int i = 0; i < saltHeader.getDataLength(); i++) {
+            salt[i] = bytes[index++];
+        }
+
+        // Identity
+        byte[] identityHeaderArray = ExtendedAdvertisementUtils.getDataElementHeader(bytes, index);
+        DataElementHeader identityHeader =
+                DataElementHeader.fromBytes(version, identityHeaderArray);
+        if (identityHeader == null) {
+            Log.v(TAG, "The second element has to be identity.");
+            return null;
+        }
+        index += identityHeaderArray.length;
+        @PresenceCredential.IdentityType int identityType =
+                toPresenceCredentialIdentityType(identityHeader.getDataType());
+        if (identityType == PresenceCredential.IDENTITY_TYPE_UNKNOWN) {
+            Log.v(TAG, "The identity type is unknown.");
+            return null;
+        }
+        byte[] encryptedIdentity = new byte[identityHeader.getDataLength()];
+        for (int i = 0; i < identityHeader.getDataLength(); i++) {
+            encryptedIdentity[i] = bytes[index++];
+        }
+        byte[] identity =
+                CryptorImpIdentityV1
+                        .getInstance().decrypt(encryptedIdentity, salt, authenticityKey);
+
+        Cryptor cryptor = getCryptor(/* encrypt= */ true);
+        byte[] encryptedDataElements =
+                new byte[bytes.length - index - cryptor.getSignatureLength()];
+        // Decrypt other data elements
+        System.arraycopy(bytes, index, encryptedDataElements, 0, encryptedDataElements.length);
+        byte[] decryptedDataElements =
+                cryptor.decrypt(encryptedDataElements, salt, authenticityKey);
+        if (decryptedDataElements == null) {
+            return null;
+        }
+
+        // Verify the computed HMAC tag is equal to HMAC tag in advertisement
+        if (cryptor.getSignatureLength() > 0) {
+            byte[] expectedHmacTag = new byte[cryptor.getSignatureLength()];
+            System.arraycopy(
+                    bytes, bytes.length - cryptor.getSignatureLength(),
+                    expectedHmacTag, 0, cryptor.getSignatureLength());
+            if (!cryptor.verify(decryptedDataElements, authenticityKey, expectedHmacTag)) {
+                Log.e(TAG, "HMAC tags not match.");
+                return null;
+            }
+        }
+
+        int dataElementArrayIndex = 0;
+        // Other Data Elements
+        List<Integer> actions = new ArrayList<>();
+        List<DataElement> dataElements = new ArrayList<>();
+        while (dataElementArrayIndex < decryptedDataElements.length) {
+            byte[] deHeaderArray = ExtendedAdvertisementUtils
+                    .getDataElementHeader(decryptedDataElements, dataElementArrayIndex);
+            DataElementHeader deHeader = DataElementHeader.fromBytes(version, deHeaderArray);
+            dataElementArrayIndex += deHeaderArray.length;
+
+            @DataElement.DataType int type = Objects.requireNonNull(deHeader).getDataType();
+            if (type == DataElement.DataType.ACTION) {
+                if (deHeader.getDataLength() != 1) {
+                    Log.v(TAG, "Action id should only 1 byte.");
+                    return null;
+                }
+                actions.add((int) decryptedDataElements[dataElementArrayIndex++]);
+            } else {
+                if (isSaltOrIdentity(type)) {
+                    Log.v(TAG, "Type " + type + " is duplicated. There should be only one salt"
+                            + " and one identity in the advertisement.");
+                    return null;
+                }
+                byte[] deData = new byte[deHeader.getDataLength()];
+                for (int i = 0; i < deHeader.getDataLength(); i++) {
+                    deData[i] = decryptedDataElements[dataElementArrayIndex++];
+                }
+                dataElements.add(new DataElement(type, deData));
+            }
+        }
+
+        return new ExtendedAdvertisement(identityType, identity, salt, authenticityKey, actions,
+                dataElements);
+    }
+
+    /** Returns the {@link DataElement}s in the advertisement. */
+    public List<DataElement> getDataElements() {
+        return new ArrayList<>(mDataElements);
+    }
+
+    /** Returns the {@link DataElement}s in the advertisement according to the key. */
+    public List<DataElement> getDataElements(@DataElement.DataType int key) {
+        List<DataElement> res = new ArrayList<>();
+        for (DataElement dataElement : mDataElements) {
+            if (key == dataElement.getKey()) {
+                res.add(dataElement);
+            }
+        }
+        return res;
+    }
+
+    @Override
+    public String toString() {
+        return String.format(
+                "ExtendedAdvertisement:"
+                        + "<VERSION: %s, length: %s, dataElementCount: %s, identityType: %s,"
+                        + " identity: %s, salt: %s, actions: %s>",
+                getVersion(),
+                getLength(),
+                getDataElements().size(),
+                getIdentityType(),
+                Arrays.toString(getIdentity()),
+                Arrays.toString(getSalt()),
+                getActions());
+    }
+
+    ExtendedAdvertisement(
+            @PresenceCredential.IdentityType int identityType,
+            byte[] identity,
+            byte[] salt,
+            byte[] authenticityKey,
+            List<Integer> actions,
+            List<DataElement> dataElements) {
+        this.mVersion = BroadcastRequest.PRESENCE_VERSION_V1;
+        this.mIdentityType = identityType;
+        this.mIdentity = identity;
+        this.mSalt = salt;
+        this.mAuthenticityKey = authenticityKey;
+        this.mActions = actions;
+        this.mDataElements = dataElements;
+        this.mCompleteDataElementsBytes = new ArrayList<>();
+
+        int length = HEADER_LENGTH; // header
+
+        // Salt
+        DataElement saltElement = new DataElement(DataElement.DataType.SALT, salt);
+        byte[] saltByteArray = ExtendedAdvertisementUtils.convertDataElementToBytes(saltElement);
+        mCompleteDataElementsBytes.add(saltByteArray);
+        length += saltByteArray.length;
+
+        // Identity
+        byte[] encryptedIdentity =
+                CryptorImpIdentityV1.getInstance().encrypt(identity, salt, authenticityKey);
+        DataElement identityElement = new DataElement(toDataType(identityType), encryptedIdentity);
+        byte[] identityByteArray =
+                ExtendedAdvertisementUtils.convertDataElementToBytes(identityElement);
+        mCompleteDataElementsBytes.add(identityByteArray);
+        length += identityByteArray.length;
+
+        List<Byte> dataElementBytes = new ArrayList<>();
+        // Intents
+        for (int action : mActions) {
+            DataElement actionElement = new DataElement(DataElement.DataType.ACTION,
+                    new byte[] {(byte) action});
+            byte[] intentByteArray =
+                    ExtendedAdvertisementUtils.convertDataElementToBytes(actionElement);
+            mCompleteDataElementsBytes.add(intentByteArray);
+            for (Byte b : intentByteArray) {
+                dataElementBytes.add(b);
+            }
+        }
+
+        // Data Elements (Extended properties)
+        for (DataElement dataElement : mDataElements) {
+            byte[] deByteArray = ExtendedAdvertisementUtils.convertDataElementToBytes(dataElement);
+            mCompleteDataElementsBytes.add(deByteArray);
+            for (Byte b : deByteArray) {
+                dataElementBytes.add(b);
+            }
+        }
+
+        byte[] data = new byte[dataElementBytes.size()];
+        for (int i = 0; i < dataElementBytes.size(); i++) {
+            data[i] = dataElementBytes.get(i);
+        }
+        Cryptor cryptor = getCryptor(/* encrypt= */ true);
+        byte[] encryptedDeBytes = cryptor.encrypt(data, salt, authenticityKey);
+
+        length += encryptedDeBytes.length;
+
+        // Signature
+        byte[] hmacTag = Objects.requireNonNull(cryptor.sign(data, authenticityKey));
+        mHmacTag = hmacTag;
+        length += hmacTag.length;
+
+        this.mLength = length;
+    }
+
+    @PresenceCredential.IdentityType
+    private static int toPresenceCredentialIdentityType(@DataElement.DataType int type) {
+        switch (type) {
+            case DataElement.DataType.PRIVATE_IDENTITY:
+                return PresenceCredential.IDENTITY_TYPE_PRIVATE;
+            case DataElement.DataType.PROVISIONED_IDENTITY:
+                return PresenceCredential.IDENTITY_TYPE_PROVISIONED;
+            case DataElement.DataType.TRUSTED_IDENTITY:
+                return PresenceCredential.IDENTITY_TYPE_TRUSTED;
+            case DataElement.DataType.PUBLIC_IDENTITY:
+            default:
+                return PresenceCredential.IDENTITY_TYPE_UNKNOWN;
+        }
+    }
+
+    @DataElement.DataType
+    private static int toDataType(@PresenceCredential.IdentityType int identityType) {
+        switch (identityType) {
+            case PresenceCredential.IDENTITY_TYPE_PRIVATE:
+                return DataElement.DataType.PRIVATE_IDENTITY;
+            case PresenceCredential.IDENTITY_TYPE_PROVISIONED:
+                return DataElement.DataType.PROVISIONED_IDENTITY;
+            case PresenceCredential.IDENTITY_TYPE_TRUSTED:
+                return DataElement.DataType.TRUSTED_IDENTITY;
+            case PresenceCredential.IDENTITY_TYPE_UNKNOWN:
+            default:
+                return DataElement.DataType.PUBLIC_IDENTITY;
+        }
+    }
+
+    /**
+     * Returns {@code true} if the given {@link DataElement.DataType} is salt, or one of the
+     * identities. Identities should be able to convert to {@link PresenceCredential.IdentityType}s.
+     */
+    private static boolean isSaltOrIdentity(@DataElement.DataType int type) {
+        return type == DataElement.DataType.SALT || type == DataElement.DataType.PRIVATE_IDENTITY
+                || type == DataElement.DataType.TRUSTED_IDENTITY
+                || type == DataElement.DataType.PROVISIONED_IDENTITY
+                || type == DataElement.DataType.PUBLIC_IDENTITY;
+    }
+
+    private static Cryptor getCryptor(boolean encrypt) {
+        if (encrypt) {
+            Log.d(TAG, "get V1 Cryptor");
+            return CryptorImpV1.getInstance();
+        }
+        Log.d(TAG, "get fake Cryptor");
+        return CryptorImpFake.getInstance();
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/presence/ExtendedAdvertisementUtils.java b/nearby/service/java/com/android/server/nearby/presence/ExtendedAdvertisementUtils.java
new file mode 100644
index 0000000..06d0f2b
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/presence/ExtendedAdvertisementUtils.java
@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.presence;
+
+import static com.android.server.nearby.presence.ExtendedAdvertisement.HEADER_LENGTH;
+
+import android.annotation.SuppressLint;
+import android.nearby.BroadcastRequest;
+import android.nearby.DataElement;
+
+import com.android.internal.util.Preconditions;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Provides serialization and deserialization util methods for {@link ExtendedAdvertisement}.
+ */
+public final class ExtendedAdvertisementUtils {
+
+    // Advertisement header related static fields.
+    private static final int VERSION_MASK = 0b11100000;
+    private static final int VERSION_MASK_AFTER_SHIT = 0b00000111;
+    private static final int HEADER_INDEX = 0;
+    private static final int HEADER_VERSION_OFFSET = 5;
+
+    /**
+     * Constructs the header of a {@link ExtendedAdvertisement}.
+     * 3 bit version, and 5 bit reserved for future use (RFU).
+     */
+    public static byte constructHeader(@BroadcastRequest.BroadcastVersion int version) {
+        return (byte) ((version << 5) & VERSION_MASK);
+    }
+
+    /** Returns the {@link BroadcastRequest.BroadcastVersion} from the advertisement
+     * in bytes format. */
+    public static int getVersion(byte[] advertisement) {
+        if (advertisement.length < HEADER_LENGTH) {
+            throw new IllegalArgumentException("Advertisement must contain header");
+        }
+        return ((advertisement[HEADER_INDEX] & VERSION_MASK) >> HEADER_VERSION_OFFSET)
+                & VERSION_MASK_AFTER_SHIT;
+    }
+
+    /** Returns the {@link DataElementHeader} from the advertisement in bytes format. */
+    public static byte[] getDataElementHeader(byte[] advertisement, int startIndex) {
+        Preconditions.checkArgument(startIndex < advertisement.length,
+                "Advertisement has no longer data left.");
+        List<Byte> headerBytes = new ArrayList<>();
+        while (startIndex < advertisement.length) {
+            byte current = advertisement[startIndex];
+            headerBytes.add(current);
+            if (!DataElementHeader.isExtending(current)) {
+                int size = headerBytes.size();
+                byte[] res = new byte[size];
+                for (int i = 0; i < size; i++) {
+                    res[i] = headerBytes.get(i);
+                }
+                return res;
+            }
+            startIndex++;
+        }
+        throw new IllegalArgumentException("There is no end of the DataElement header.");
+    }
+
+    /**
+     * Constructs {@link DataElement}, including header(s) and actual data element data.
+     *
+     * Suppresses warning because {@link DataElement} checks isValidType in constructor.
+     */
+    @SuppressLint("WrongConstant")
+    public static byte[] convertDataElementToBytes(DataElement dataElement) {
+        @DataElement.DataType int type = dataElement.getKey();
+        byte[] data = dataElement.getValue();
+        DataElementHeader header = new DataElementHeader(BroadcastRequest.PRESENCE_VERSION_V1,
+                type, data.length);
+        byte[] headerByteArray = header.toBytes();
+
+        byte[] res = new byte[headerByteArray.length + data.length];
+        System.arraycopy(headerByteArray, 0, res, 0, headerByteArray.length);
+        System.arraycopy(data, 0, res, headerByteArray.length, data.length);
+        return res;
+    }
+
+    private ExtendedAdvertisementUtils() {}
+}
diff --git a/nearby/service/java/com/android/server/nearby/presence/FastAdvertisement.java b/nearby/service/java/com/android/server/nearby/presence/FastAdvertisement.java
index e4df673..ae53ada 100644
--- a/nearby/service/java/com/android/server/nearby/presence/FastAdvertisement.java
+++ b/nearby/service/java/com/android/server/nearby/presence/FastAdvertisement.java
@@ -24,7 +24,6 @@
 import com.android.internal.util.Preconditions;
 
 import java.nio.ByteBuffer;
-import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
@@ -42,7 +41,7 @@
 // The header contains:
 // version (3 bits) | provision_mode_flag (1 bit) | identity_type (3 bits) |
 // extended_advertisement_mode (1 bit)
-public class FastAdvertisement {
+public class FastAdvertisement extends Advertisement {
 
     private static final int FAST_ADVERTISEMENT_MAX_LENGTH = 24;
 
@@ -85,7 +84,8 @@
                 (byte) request.getTxPower());
     }
 
-    /** Serialize an {@link FastAdvertisement} object into bytes. */
+    /** Serialize a {@link FastAdvertisement} object into bytes. */
+    @Override
     public byte[] toBytes() {
         ByteBuffer buffer = ByteBuffer.allocate(getLength());
 
@@ -100,18 +100,8 @@
         return buffer.array();
     }
 
-    private final int mLength;
-
     private final int mLtvFieldCount;
 
-    @PresenceCredential.IdentityType private final int mIdentityType;
-
-    private final byte[] mIdentity;
-
-    private final byte[] mSalt;
-
-    private final List<Integer> mActions;
-
     @Nullable
     private final Byte mTxPower;
 
@@ -121,6 +111,7 @@
             byte[] salt,
             List<Integer> actions,
             @Nullable Byte txPower) {
+        this.mVersion = BroadcastRequest.PRESENCE_VERSION_V0;
         this.mIdentityType = identityType;
         this.mIdentity = identity;
         this.mSalt = salt;
@@ -143,44 +134,12 @@
                 "FastAdvertisement exceeds maximum length");
     }
 
-    /** Returns the version in the advertisement. */
-    @BroadcastRequest.BroadcastVersion
-    public int getVersion() {
-        return BroadcastRequest.PRESENCE_VERSION_V0;
-    }
-
-    /** Returns the identity type in the advertisement. */
-    @PresenceCredential.IdentityType
-    public int getIdentityType() {
-        return mIdentityType;
-    }
-
-    /** Returns the identity bytes in the advertisement. */
-    public byte[] getIdentity() {
-        return mIdentity.clone();
-    }
-
-    /** Returns the salt of the advertisement. */
-    public byte[] getSalt() {
-        return mSalt.clone();
-    }
-
-    /** Returns the actions in the advertisement. */
-    public List<Integer> getActions() {
-        return new ArrayList<>(mActions);
-    }
-
     /** Returns the adjusted TX Power in the advertisement. Null if not available. */
     @Nullable
     public Byte getTxPower() {
         return mTxPower;
     }
 
-    /** Returns the length of the advertisement. */
-    public int getLength() {
-        return mLength;
-    }
-
     /** Returns the count of LTV fields in the advertisement. */
     public int getLtvFieldCount() {
         return mLtvFieldCount;
diff --git a/nearby/service/java/com/android/server/nearby/presence/PresenceDiscoveryResult.java b/nearby/service/java/com/android/server/nearby/presence/PresenceDiscoveryResult.java
index d1c72ae..5a76d96 100644
--- a/nearby/service/java/com/android/server/nearby/presence/PresenceDiscoveryResult.java
+++ b/nearby/service/java/com/android/server/nearby/presence/PresenceDiscoveryResult.java
@@ -16,31 +16,55 @@
 
 package com.android.server.nearby.presence;
 
-import android.nearby.NearbyDevice;
+import static com.android.server.nearby.NearbyService.TAG;
+
+import android.annotation.NonNull;
+import android.nearby.DataElement;
 import android.nearby.NearbyDeviceParcelable;
 import android.nearby.PresenceDevice;
 import android.nearby.PresenceScanFilter;
 import android.nearby.PublicCredential;
+import android.util.ArraySet;
+import android.util.Log;
+
+import com.android.internal.annotations.VisibleForTesting;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
+import java.util.Set;
 
 /** Represents a Presence discovery result. */
 public class PresenceDiscoveryResult {
 
     /** Creates a {@link PresenceDiscoveryResult} from the scan data. */
     public static PresenceDiscoveryResult fromDevice(NearbyDeviceParcelable device) {
+        PresenceDevice presenceDevice = device.getPresenceDevice();
+        if (presenceDevice != null) {
+            return new PresenceDiscoveryResult.Builder()
+                    .setTxPower(device.getTxPower())
+                    .setRssi(device.getRssi())
+                    .setSalt(presenceDevice.getSalt())
+                    .setPublicCredential(device.getPublicCredential())
+                    .addExtendedProperties(presenceDevice.getExtendedProperties())
+                    .setEncryptedIdentityTag(device.getEncryptionKeyTag())
+                    .build();
+        }
         byte[] salt = device.getSalt();
         if (salt == null) {
             salt = new byte[0];
         }
-        return new PresenceDiscoveryResult.Builder()
-                .setTxPower(device.getTxPower())
+
+        PresenceDiscoveryResult.Builder builder = new PresenceDiscoveryResult.Builder();
+        builder.setTxPower(device.getTxPower())
                 .setRssi(device.getRssi())
                 .setSalt(salt)
                 .addPresenceAction(device.getAction())
-                .setPublicCredential(device.getPublicCredential())
-                .build();
+                .setPublicCredential(device.getPublicCredential());
+        if (device.getPresenceDevice() != null) {
+            builder.addExtendedProperties(device.getPresenceDevice().getExtendedProperties());
+        }
+        return builder.build();
     }
 
     private final int mTxPower;
@@ -48,25 +72,35 @@
     private final byte[] mSalt;
     private final List<Integer> mPresenceActions;
     private final PublicCredential mPublicCredential;
+    private final List<DataElement> mExtendedProperties;
+    private final byte[] mEncryptedIdentityTag;
 
     private PresenceDiscoveryResult(
             int txPower,
             int rssi,
             byte[] salt,
             List<Integer> presenceActions,
-            PublicCredential publicCredential) {
+            PublicCredential publicCredential,
+            List<DataElement> extendedProperties,
+            byte[] encryptedIdentityTag) {
         mTxPower = txPower;
         mRssi = rssi;
         mSalt = salt;
         mPresenceActions = presenceActions;
         mPublicCredential = publicCredential;
+        mExtendedProperties = extendedProperties;
+        mEncryptedIdentityTag = encryptedIdentityTag;
     }
 
     /** Returns whether the discovery result matches the scan filter. */
     public boolean matches(PresenceScanFilter scanFilter) {
+        if (accountKeyMatches(scanFilter.getExtendedProperties())) {
+            return true;
+        }
+
         return pathLossMatches(scanFilter.getMaxPathLoss())
                 && actionMatches(scanFilter.getPresenceActions())
-                && credentialMatches(scanFilter.getCredentials());
+                && identityMatches(scanFilter.getCredentials());
     }
 
     private boolean pathLossMatches(int maxPathLoss) {
@@ -80,21 +114,47 @@
         return filterActions.stream().anyMatch(mPresenceActions::contains);
     }
 
-    private boolean credentialMatches(List<PublicCredential> credentials) {
-        return credentials.contains(mPublicCredential);
+    @VisibleForTesting
+    boolean accountKeyMatches(List<DataElement> extendedProperties) {
+        Set<byte[]> accountKeys = new ArraySet<>();
+        for (DataElement requestedDe : mExtendedProperties) {
+            if (requestedDe.getKey() != DataElement.DataType.ACCOUNT_KEY_DATA) {
+                continue;
+            }
+            accountKeys.add(requestedDe.getValue());
+        }
+        for (DataElement scannedDe : extendedProperties) {
+            if (scannedDe.getKey() != DataElement.DataType.ACCOUNT_KEY_DATA) {
+                continue;
+            }
+            // If one account key matches, then returns true.
+            for (byte[] key : accountKeys) {
+                if (Arrays.equals(key, scannedDe.getValue())) {
+                    return true;
+                }
+            }
+        }
+
+        return false;
     }
 
-    /** Converts a presence device from the discovery result. */
-    public PresenceDevice toPresenceDevice() {
-        return new PresenceDevice.Builder(
-                // Use the public credential hash as the device Id.
-                String.valueOf(mPublicCredential.hashCode()),
-                mSalt,
-                mPublicCredential.getSecretId(),
-                mPublicCredential.getEncryptedMetadata())
-                .setRssi(mRssi)
-                .addMedium(NearbyDevice.Medium.BLE)
-                .build();
+    @VisibleForTesting
+    /** Gets presence {@link DataElement}s of the discovery result. */
+    public List<DataElement> getExtendedProperties() {
+        return mExtendedProperties;
+    }
+
+    private boolean identityMatches(List<PublicCredential> publicCredentials) {
+        if (mEncryptedIdentityTag.length == 0) {
+            return true;
+        }
+        for (PublicCredential publicCredential : publicCredentials) {
+            if (Arrays.equals(
+                    mEncryptedIdentityTag, publicCredential.getEncryptedMetadataKeyTag())) {
+                return true;
+            }
+        }
+        return false;
     }
 
     /** Builder for {@link PresenceDiscoveryResult}. */
@@ -105,9 +165,12 @@
 
         private PublicCredential mPublicCredential;
         private final List<Integer> mPresenceActions;
+        private final List<DataElement> mExtendedProperties;
+        private byte[] mEncryptedIdentityTag = new byte[0];
 
         public Builder() {
             mPresenceActions = new ArrayList<>();
+            mExtendedProperties = new ArrayList<>();
         }
 
         /** Sets the calibrated tx power for the discovery result. */
@@ -130,7 +193,18 @@
 
         /** Sets the public credential for the discovery result. */
         public Builder setPublicCredential(PublicCredential publicCredential) {
-            mPublicCredential = publicCredential;
+            if (publicCredential != null) {
+                mPublicCredential = publicCredential;
+            }
+            return this;
+        }
+
+        /** Sets the encrypted identity tag for the discovery result. Usually it is passed from
+         * {@link NearbyDeviceParcelable} and the tag is calculated with authenticity key when
+         * receiving an advertisement.
+         */
+        public Builder setEncryptedIdentityTag(byte[] encryptedIdentityTag) {
+            mEncryptedIdentityTag = encryptedIdentityTag;
             return this;
         }
 
@@ -140,10 +214,34 @@
             return this;
         }
 
+        /** Adds presence {@link DataElement}s of the discovery result. */
+        public Builder addExtendedProperties(DataElement dataElement) {
+            if (dataElement.getKey() == DataElement.DataType.ACTION) {
+                byte[] value = dataElement.getValue();
+                if (value.length == 1) {
+                    addPresenceAction(Byte.toUnsignedInt(value[0]));
+                } else {
+                    Log.e(TAG, "invalid action data element");
+                }
+            } else {
+                mExtendedProperties.add(dataElement);
+            }
+            return this;
+        }
+
+        /** Adds presence {@link DataElement}s of the discovery result. */
+        public Builder addExtendedProperties(@NonNull List<DataElement> dataElements) {
+            for (DataElement dataElement : dataElements) {
+                addExtendedProperties(dataElement);
+            }
+            return this;
+        }
+
         /** Builds a {@link PresenceDiscoveryResult}. */
         public PresenceDiscoveryResult build() {
             return new PresenceDiscoveryResult(
-                    mTxPower, mRssi, mSalt, mPresenceActions, mPublicCredential);
+                    mTxPower, mRssi, mSalt, mPresenceActions,
+                    mPublicCredential, mExtendedProperties, mEncryptedIdentityTag);
         }
     }
 }
diff --git a/nearby/service/java/com/android/server/nearby/presence/PresenceManager.java b/nearby/service/java/com/android/server/nearby/presence/PresenceManager.java
new file mode 100644
index 0000000..8b2db50
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/presence/PresenceManager.java
@@ -0,0 +1,143 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.presence;
+
+import static com.android.server.nearby.NearbyService.TAG;
+
+import android.annotation.Nullable;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.nearby.DataElement;
+import android.nearby.NearbyDevice;
+import android.nearby.NearbyManager;
+import android.nearby.PresenceDevice;
+import android.nearby.PresenceScanFilter;
+import android.nearby.PublicCredential;
+import android.nearby.ScanCallback;
+import android.nearby.ScanRequest;
+import android.util.Log;
+
+import androidx.annotation.NonNull;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.server.nearby.common.locator.Locator;
+import com.android.server.nearby.common.locator.LocatorContextWrapper;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.Locale;
+import java.util.concurrent.Executors;
+
+/** PresenceManager is the class initiated in nearby service to handle presence related work. */
+public class PresenceManager {
+
+    final LocatorContextWrapper mLocatorContextWrapper;
+    final Locator mLocator;
+    private final IntentFilter mIntentFilter;
+
+    @VisibleForTesting
+    final ScanCallback mScanCallback =
+            new ScanCallback() {
+                @Override
+                public void onDiscovered(@NonNull NearbyDevice device) {
+                    Log.i(TAG, "[PresenceManager] discovered Device.");
+                    PresenceDevice presenceDevice = (PresenceDevice) device;
+                    List<DataElement> dataElements = presenceDevice.getExtendedProperties();
+                    for (DataElement dataElement : dataElements) {
+                        Log.i(TAG, "[PresenceManager] Data Element key "
+                                + dataElement.getKey());
+                        Log.i(TAG, "[PresenceManager] Data Element value "
+                                + Arrays.toString(dataElement.getValue()));
+                    }
+                }
+
+                @Override
+                public void onUpdated(@NonNull NearbyDevice device) {}
+
+                @Override
+                public void onLost(@NonNull NearbyDevice device) {}
+            };
+
+    private final BroadcastReceiver mScreenBroadcastReceiver =
+            new BroadcastReceiver() {
+                @Override
+                public void onReceive(Context context, Intent intent) {
+                    NearbyManager manager = getNearbyManager();
+                    if (manager == null) {
+                        Log.e(TAG, "Nearby Manager is null");
+                        return;
+                    }
+                    if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
+                        Log.d(TAG, "PresenceManager Start scan.");
+                        PublicCredential publicCredential =
+                                new PublicCredential.Builder(new byte[]{1}, new byte[]{1},
+                                        new byte[]{1}, new byte[]{1}, new byte[]{1}).build();
+                        PresenceScanFilter presenceScanFilter =
+                                new PresenceScanFilter.Builder()
+                                        .setMaxPathLoss(3)
+                                        .addCredential(publicCredential)
+                                        .addPresenceAction(1)
+                                        .addExtendedProperty(new DataElement(
+                                                DataElement.DataType.ACCOUNT_KEY_DATA,
+                                                new byte[16]))
+                                        .build();
+                        ScanRequest scanRequest =
+                                new ScanRequest.Builder()
+                                        .setScanType(ScanRequest.SCAN_TYPE_NEARBY_PRESENCE)
+                                        .addScanFilter(presenceScanFilter)
+                                        .build();
+                        Log.d(
+                                TAG,
+                                String.format(
+                                        Locale.getDefault(),
+                                        "[PresenceManager] Start Presence scan with request: %s",
+                                        scanRequest.toString()));
+                        manager.startScan(
+                                scanRequest, Executors.newSingleThreadExecutor(), mScanCallback);
+                    } else if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
+                        Log.d(TAG, "PresenceManager Stop scan.");
+                        manager.stopScan(mScanCallback);
+                    }
+                }
+            };
+
+    public PresenceManager(LocatorContextWrapper contextWrapper) {
+        mLocatorContextWrapper = contextWrapper;
+        mLocator = mLocatorContextWrapper.getLocator();
+        mIntentFilter = new IntentFilter();
+    }
+
+    /** Null when the Nearby Service is not available. */
+    @Nullable
+    private NearbyManager getNearbyManager() {
+        return (NearbyManager)
+                mLocatorContextWrapper
+                        .getApplicationContext()
+                        .getSystemService(Context.NEARBY_SERVICE);
+    }
+
+    /** Function called when nearby service start. */
+    public void initiate() {
+        mIntentFilter.addAction(Intent.ACTION_SCREEN_ON);
+        mIntentFilter.addAction(Intent.ACTION_SCREEN_OFF);
+        mLocatorContextWrapper
+                .getContext()
+                .registerReceiver(mScreenBroadcastReceiver, mIntentFilter);
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/provider/BleBroadcastProvider.java b/nearby/service/java/com/android/server/nearby/provider/BleBroadcastProvider.java
index 67392ad..2b9fdb9 100644
--- a/nearby/service/java/com/android/server/nearby/provider/BleBroadcastProvider.java
+++ b/nearby/service/java/com/android/server/nearby/provider/BleBroadcastProvider.java
@@ -16,17 +16,25 @@
 
 package com.android.server.nearby.provider;
 
+import static com.android.server.nearby.NearbyService.TAG;
+import static com.android.server.nearby.presence.PresenceConstants.PRESENCE_UUID;
+
 import android.bluetooth.BluetoothAdapter;
 import android.bluetooth.le.AdvertiseCallback;
 import android.bluetooth.le.AdvertiseData;
 import android.bluetooth.le.AdvertiseSettings;
+import android.bluetooth.le.AdvertisingSet;
+import android.bluetooth.le.AdvertisingSetCallback;
+import android.bluetooth.le.AdvertisingSetParameters;
 import android.bluetooth.le.BluetoothLeAdvertiser;
 import android.nearby.BroadcastCallback;
+import android.nearby.BroadcastRequest;
 import android.os.ParcelUuid;
+import android.util.Log;
 
+import com.android.internal.annotations.VisibleForTesting;
 import com.android.server.nearby.injector.Injector;
 
-import java.util.UUID;
 import java.util.concurrent.Executor;
 
 /**
@@ -46,13 +54,16 @@
 
     private BroadcastListener mBroadcastListener;
     private boolean mIsAdvertising;
-
+    @VisibleForTesting
+    AdvertisingSetCallback mAdvertisingSetCallback;
     BleBroadcastProvider(Injector injector, Executor executor) {
         mInjector = injector;
         mExecutor = executor;
+        mAdvertisingSetCallback = getAdvertisingSetCallback();
     }
 
-    void start(byte[] advertisementPackets, BroadcastListener listener) {
+    void start(@BroadcastRequest.BroadcastVersion int version, byte[] advertisementPackets,
+            BroadcastListener listener) {
         if (mIsAdvertising) {
             stop();
         }
@@ -63,23 +74,36 @@
                     mInjector.getBluetoothAdapter().getBluetoothLeAdvertiser();
             if (bluetoothLeAdvertiser != null) {
                 advertiseStarted = true;
-                AdvertiseSettings settings =
-                        new AdvertiseSettings.Builder()
-                                .setAdvertiseMode(AdvertiseSettings.ADVERTISE_MODE_BALANCED)
-                                .setTxPowerLevel(AdvertiseSettings.ADVERTISE_TX_POWER_MEDIUM)
-                                .setConnectable(true)
-                                .build();
-
-                // TODO(b/230538655) Use empty data until Presence V1 protocol is implemented.
-                ParcelUuid emptyParcelUuid = new ParcelUuid(new UUID(0L, 0L));
-                byte[] emptyAdvertisementPackets = new byte[0];
                 AdvertiseData advertiseData =
                         new AdvertiseData.Builder()
-                                .addServiceData(emptyParcelUuid, emptyAdvertisementPackets).build();
+                                .addServiceData(new ParcelUuid(PRESENCE_UUID),
+                                        advertisementPackets).build();
                 try {
                     mBroadcastListener = listener;
-                    bluetoothLeAdvertiser.startAdvertising(settings, advertiseData, this);
+                    switch (version) {
+                        case BroadcastRequest.PRESENCE_VERSION_V0:
+                            bluetoothLeAdvertiser.startAdvertising(getAdvertiseSettings(),
+                                    advertiseData, this);
+                            break;
+                        case BroadcastRequest.PRESENCE_VERSION_V1:
+                            if (adapter.isLeExtendedAdvertisingSupported()) {
+                                bluetoothLeAdvertiser.startAdvertisingSet(
+                                        getAdvertisingSetParameters(),
+                                        advertiseData,
+                                        null, null, null, mAdvertisingSetCallback);
+                            } else {
+                                Log.w(TAG, "Failed to start advertising set because the chipset"
+                                        + " does not supports LE Extended Advertising feature.");
+                                advertiseStarted = false;
+                            }
+                            break;
+                        default:
+                            Log.w(TAG, "Failed to start advertising set because the advertisement"
+                                    + " is wrong.");
+                            advertiseStarted = false;
+                    }
                 } catch (NullPointerException | IllegalStateException | SecurityException e) {
+                    Log.w(TAG, "Failed to start advertising.", e);
                     advertiseStarted = false;
                 }
             }
@@ -97,6 +121,7 @@
                         mInjector.getBluetoothAdapter().getBluetoothLeAdvertiser();
                 if (bluetoothLeAdvertiser != null) {
                     bluetoothLeAdvertiser.stopAdvertising(this);
+                    bluetoothLeAdvertiser.stopAdvertisingSet(mAdvertisingSetCallback);
                 }
             }
             mBroadcastListener = null;
@@ -120,4 +145,41 @@
             mBroadcastListener.onStatusChanged(BroadcastCallback.STATUS_FAILURE);
         }
     }
+
+    private static AdvertiseSettings getAdvertiseSettings() {
+        return new AdvertiseSettings.Builder()
+                .setAdvertiseMode(AdvertiseSettings.ADVERTISE_MODE_BALANCED)
+                .setTxPowerLevel(AdvertiseSettings.ADVERTISE_TX_POWER_MEDIUM)
+                .setConnectable(true)
+                .build();
+    }
+
+    private static AdvertisingSetParameters getAdvertisingSetParameters() {
+        return new AdvertisingSetParameters.Builder()
+                .setInterval(AdvertisingSetParameters.INTERVAL_MEDIUM)
+                .setTxPowerLevel(AdvertisingSetParameters.TX_POWER_MEDIUM)
+                .setIncludeTxPower(true)
+                .setConnectable(true)
+                .build();
+    }
+
+    private AdvertisingSetCallback getAdvertisingSetCallback() {
+        return new AdvertisingSetCallback() {
+            @Override
+            public void onAdvertisingSetStarted(AdvertisingSet advertisingSet,
+                    int txPower, int status) {
+                if (status == AdvertisingSetCallback.ADVERTISE_SUCCESS) {
+                    if (mBroadcastListener != null) {
+                        mBroadcastListener.onStatusChanged(BroadcastCallback.STATUS_OK);
+                    }
+                    mIsAdvertising = true;
+                } else {
+                    Log.e(TAG, "Starts advertising failed in status " + status);
+                    if (mBroadcastListener != null) {
+                        mBroadcastListener.onStatusChanged(BroadcastCallback.STATUS_FAILURE);
+                    }
+                }
+            }
+        };
+    }
 }
diff --git a/nearby/service/java/com/android/server/nearby/provider/BleDiscoveryProvider.java b/nearby/service/java/com/android/server/nearby/provider/BleDiscoveryProvider.java
index e8aea79..d828ef9 100644
--- a/nearby/service/java/com/android/server/nearby/provider/BleDiscoveryProvider.java
+++ b/nearby/service/java/com/android/server/nearby/provider/BleDiscoveryProvider.java
@@ -27,16 +27,22 @@
 import android.bluetooth.le.ScanResult;
 import android.bluetooth.le.ScanSettings;
 import android.content.Context;
+import android.nearby.DataElement;
 import android.nearby.NearbyDevice;
 import android.nearby.NearbyDeviceParcelable;
+import android.nearby.PresenceDevice;
+import android.nearby.PresenceScanFilter;
+import android.nearby.PublicCredential;
 import android.nearby.ScanRequest;
 import android.os.ParcelUuid;
 import android.util.Log;
 
 import com.android.server.nearby.common.bluetooth.fastpair.Constants;
 import com.android.server.nearby.injector.Injector;
+import com.android.server.nearby.presence.ExtendedAdvertisement;
 import com.android.server.nearby.presence.PresenceConstants;
 import com.android.server.nearby.util.ForegroundThread;
+import com.android.server.nearby.util.encryption.CryptorImpIdentityV1;
 
 import com.google.common.annotations.VisibleForTesting;
 
@@ -57,6 +63,15 @@
     // Don't block the thread as it may be used by other services.
     private static final Executor NEARBY_EXECUTOR = ForegroundThread.getExecutor();
     private final Injector mInjector;
+    private android.bluetooth.le.ScanCallback mScanCallbackLegacy =
+            new android.bluetooth.le.ScanCallback() {
+                @Override
+                public void onScanResult(int callbackType, ScanResult scanResult) {
+                }
+                @Override
+                public void onScanFailed(int errorCode) {
+                }
+            };
     private android.bluetooth.le.ScanCallback mScanCallback =
             new android.bluetooth.le.ScanCallback() {
                 @Override
@@ -81,7 +96,8 @@
                             } else {
                                 byte[] presenceData = serviceDataMap.get(PRESENCE_UUID);
                                 if (presenceData != null) {
-                                    builder.setData(serviceDataMap.get(PRESENCE_UUID));
+                                    setPresenceDevice(presenceData, builder, deviceName,
+                                            scanResult.getRssi());
                                 }
                             }
                         }
@@ -91,7 +107,7 @@
 
                 @Override
                 public void onScanFailed(int errorCode) {
-                    Log.w(TAG, "BLE Scan failed with error code " + errorCode);
+                    Log.w(TAG, "BLE 5.0 Scan failed with error code " + errorCode);
                 }
             };
 
@@ -100,12 +116,39 @@
         mInjector = injector;
     }
 
+    private static PresenceDevice getPresenceDevice(ExtendedAdvertisement advertisement,
+            String deviceName, int rssi) {
+        // TODO(238458326): After implementing encryption, use real data.
+        byte[] secretIdBytes = new byte[0];
+        PresenceDevice.Builder builder =
+                new PresenceDevice.Builder(
+                        String.valueOf(advertisement.hashCode()),
+                        advertisement.getSalt(),
+                        secretIdBytes,
+                        advertisement.getIdentity())
+                        .addMedium(NearbyDevice.Medium.BLE)
+                        .setName(deviceName)
+                        .setRssi(rssi);
+        for (int i : advertisement.getActions()) {
+            builder.addExtendedProperty(new DataElement(DataElement.DataType.ACTION,
+                    new byte[]{(byte) i}));
+        }
+        for (DataElement dataElement : advertisement.getDataElements()) {
+            builder.addExtendedProperty(dataElement);
+        }
+        return builder.build();
+    }
+
     private static List<ScanFilter> getScanFilters() {
         List<ScanFilter> scanFilterList = new ArrayList<>();
         scanFilterList.add(
                 new ScanFilter.Builder()
                         .setServiceData(FAST_PAIR_UUID, new byte[]{0}, new byte[]{0})
                         .build());
+        scanFilterList.add(
+                new ScanFilter.Builder()
+                        .setServiceData(PRESENCE_UUID, new byte[]{0}, new byte[]{0})
+                        .build());
         return scanFilterList;
     }
 
@@ -130,8 +173,9 @@
     @Override
     protected void onStart() {
         if (isBleAvailable()) {
-            Log.d(TAG, "BleDiscoveryProvider started.");
-            startScan(getScanFilters(), getScanSettings(), mScanCallback);
+            Log.d(TAG, "BleDiscoveryProvider started");
+            startScan(getScanFilters(), getScanSettings(/* legacy= */ false), mScanCallback);
+            startScan(getScanFilters(), getScanSettings(/* legacy= */ true), mScanCallbackLegacy);
             return;
         }
         Log.w(TAG, "Cannot start BleDiscoveryProvider because Ble is not available.");
@@ -148,6 +192,10 @@
         }
         Log.v(TAG, "Ble scan stopped.");
         bluetoothLeScanner.stopScan(mScanCallback);
+        bluetoothLeScanner.stopScan(mScanCallbackLegacy);
+        if (mScanFilters != null) {
+            mScanFilters.clear();
+        }
     }
 
     @Override
@@ -179,7 +227,7 @@
         }
     }
 
-    private ScanSettings getScanSettings() {
+    private ScanSettings getScanSettings(boolean legacy) {
         int bleScanMode = ScanSettings.SCAN_MODE_LOW_POWER;
         switch (mController.getProviderScanMode()) {
             case ScanRequest.SCAN_MODE_LOW_LATENCY:
@@ -195,11 +243,37 @@
                 bleScanMode = ScanSettings.SCAN_MODE_OPPORTUNISTIC;
                 break;
         }
-        return new ScanSettings.Builder().setScanMode(bleScanMode).build();
+        return new ScanSettings.Builder().setScanMode(bleScanMode).setLegacy(legacy).build();
     }
 
     @VisibleForTesting
     ScanCallback getScanCallback() {
         return mScanCallback;
     }
+
+    private void setPresenceDevice(byte[] data, NearbyDeviceParcelable.Builder builder,
+            String deviceName, int rssi) {
+        for (android.nearby.ScanFilter scanFilter : mScanFilters) {
+            if (scanFilter instanceof PresenceScanFilter) {
+                // Iterate all possible authenticity key and identity combinations to decrypt
+                // advertisement
+                PresenceScanFilter presenceFilter = (PresenceScanFilter) scanFilter;
+                for (PublicCredential credential : presenceFilter.getCredentials()) {
+                    ExtendedAdvertisement advertisement =
+                            ExtendedAdvertisement.fromBytes(data, credential);
+                    if (advertisement == null) {
+                        continue;
+                    }
+                    if (CryptorImpIdentityV1.getInstance().verify(
+                            advertisement.getIdentity(),
+                            credential.getEncryptedMetadataKeyTag())) {
+                        builder.setPresenceDevice(getPresenceDevice(advertisement, deviceName,
+                                rssi));
+                        builder.setEncryptionKeyTag(credential.getEncryptedMetadataKeyTag());
+                        return;
+                    }
+                }
+            }
+        }
+    }
 }
diff --git a/nearby/service/java/com/android/server/nearby/provider/BroadcastProviderManager.java b/nearby/service/java/com/android/server/nearby/provider/BroadcastProviderManager.java
index 3fffda5..400f936 100644
--- a/nearby/service/java/com/android/server/nearby/provider/BroadcastProviderManager.java
+++ b/nearby/service/java/com/android/server/nearby/provider/BroadcastProviderManager.java
@@ -16,6 +16,9 @@
 
 package com.android.server.nearby.provider;
 
+import static com.android.server.nearby.NearbyService.SUPPORT_TEST_APP;
+
+import android.annotation.Nullable;
 import android.content.Context;
 import android.nearby.BroadcastCallback;
 import android.nearby.BroadcastRequest;
@@ -27,6 +30,8 @@
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.server.nearby.NearbyConfiguration;
 import com.android.server.nearby.injector.Injector;
+import com.android.server.nearby.presence.Advertisement;
+import com.android.server.nearby.presence.ExtendedAdvertisement;
 import com.android.server.nearby.presence.FastAdvertisement;
 import com.android.server.nearby.util.ForegroundThread;
 
@@ -66,10 +71,12 @@
     public void startBroadcast(BroadcastRequest broadcastRequest, IBroadcastListener listener) {
         synchronized (mLock) {
             mExecutor.execute(() -> {
-                NearbyConfiguration configuration = new NearbyConfiguration();
-                if (!configuration.isPresenceBroadcastLegacyEnabled()) {
-                    reportBroadcastStatus(listener, BroadcastCallback.STATUS_FAILURE);
-                    return;
+                if (!SUPPORT_TEST_APP) {
+                    NearbyConfiguration configuration = new NearbyConfiguration();
+                    if (!configuration.isPresenceBroadcastLegacyEnabled()) {
+                        reportBroadcastStatus(listener, BroadcastCallback.STATUS_FAILURE);
+                        return;
+                    }
                 }
                 if (broadcastRequest.getType() != BroadcastRequest.BROADCAST_TYPE_NEARBY_PRESENCE) {
                     reportBroadcastStatus(listener, BroadcastCallback.STATUS_FAILURE);
@@ -77,25 +84,37 @@
                 }
                 PresenceBroadcastRequest presenceBroadcastRequest =
                         (PresenceBroadcastRequest) broadcastRequest;
-                if (presenceBroadcastRequest.getVersion() != BroadcastRequest.PRESENCE_VERSION_V0) {
+                Advertisement advertisement = getAdvertisement(presenceBroadcastRequest);
+                if (advertisement == null) {
+                    Log.e(TAG, "Failed to start broadcast because broadcastRequest is illegal.");
                     reportBroadcastStatus(listener, BroadcastCallback.STATUS_FAILURE);
                     return;
                 }
-                FastAdvertisement fastAdvertisement = FastAdvertisement.createFromRequest(
-                        presenceBroadcastRequest);
-                byte[] advertisementPackets = fastAdvertisement.toBytes();
                 mBroadcastListener = listener;
-                mBleBroadcastProvider.start(advertisementPackets, this);
+                mBleBroadcastProvider.start(presenceBroadcastRequest.getVersion(),
+                        advertisement.toBytes(), this);
             });
         }
     }
 
+    @Nullable
+    private Advertisement getAdvertisement(PresenceBroadcastRequest request) {
+        switch (request.getVersion()) {
+            case BroadcastRequest.PRESENCE_VERSION_V0:
+                return FastAdvertisement.createFromRequest(request);
+            case BroadcastRequest.PRESENCE_VERSION_V1:
+                return ExtendedAdvertisement.createFromRequest(request);
+            default:
+                return null;
+        }
+    }
+
     /**
      * Stops the nearby broadcast.
      */
     public void stopBroadcast(IBroadcastListener listener) {
         synchronized (mLock) {
-            if (!mNearbyConfiguration.isPresenceBroadcastLegacyEnabled()) {
+            if (!SUPPORT_TEST_APP && !mNearbyConfiguration.isPresenceBroadcastLegacyEnabled()) {
                 reportBroadcastStatus(listener, BroadcastCallback.STATUS_FAILURE);
                 return;
             }
diff --git a/nearby/service/java/com/android/server/nearby/provider/ChreCommunication.java b/nearby/service/java/com/android/server/nearby/provider/ChreCommunication.java
index 5077ffe..9d93843 100644
--- a/nearby/service/java/com/android/server/nearby/provider/ChreCommunication.java
+++ b/nearby/service/java/com/android/server/nearby/provider/ChreCommunication.java
@@ -19,15 +19,17 @@
 import static com.android.server.nearby.NearbyService.TAG;
 
 import android.annotation.Nullable;
+import android.content.Context;
 import android.hardware.location.ContextHubClient;
 import android.hardware.location.ContextHubClientCallback;
 import android.hardware.location.ContextHubInfo;
+import android.hardware.location.ContextHubManager;
 import android.hardware.location.ContextHubTransaction;
 import android.hardware.location.NanoAppMessage;
 import android.hardware.location.NanoAppState;
 import android.util.Log;
 
-import com.android.server.nearby.injector.ContextHubManagerAdapter;
+import com.android.internal.annotations.VisibleForTesting;
 import com.android.server.nearby.injector.Injector;
 
 import com.google.common.base.Preconditions;
@@ -63,19 +65,28 @@
     }
 
     private final Injector mInjector;
+    private final Context mContext;
     private final Executor mExecutor;
 
     private boolean mStarted = false;
+    // null when CHRE availability result has not been returned
+    @Nullable private Boolean mChreSupport = null;
     @Nullable private ContextHubCommsCallback mCallback;
     @Nullable private ContextHubClient mContextHubClient;
 
-    public ChreCommunication(Injector injector, Executor executor) {
+    public ChreCommunication(Injector injector, Context context, Executor executor) {
         mInjector = injector;
+        mContext = context;
         mExecutor = executor;
     }
 
-    public boolean available() {
-        return mContextHubClient != null;
+    /**
+     * @return {@code true} if NanoApp is available and {@code null} when CHRE availability result
+     * has not been returned
+     */
+    @Nullable
+    public Boolean available() {
+        return mChreSupport;
     }
 
     /**
@@ -86,12 +97,12 @@
      *     contexthub.
      */
     public synchronized void start(ContextHubCommsCallback callback, Set<Long> nanoAppIds) {
-        ContextHubManagerAdapter manager = mInjector.getContextHubManagerAdapter();
+        ContextHubManager manager = mInjector.getContextHubManager();
         if (manager == null) {
             Log.e(TAG, "ContexHub not available in this device");
             return;
         } else {
-            Log.i(TAG, "Start ChreCommunication");
+            Log.i(TAG, "[ChreCommunication] Start ChreCommunication");
         }
         Preconditions.checkNotNull(callback);
         Preconditions.checkArgument(!nanoAppIds.isEmpty());
@@ -134,6 +145,7 @@
         if (mContextHubClient != null) {
             mContextHubClient.close();
             mContextHubClient = null;
+            mChreSupport = null;
         }
     }
 
@@ -172,7 +184,8 @@
         mCallback.onNanoAppRestart(nanoAppId);
     }
 
-    private static String contextHubTransactionResultToString(int result) {
+    @VisibleForTesting
+    static String contextHubTransactionResultToString(int result) {
         switch (result) {
             case ContextHubTransaction.RESULT_SUCCESS:
                 return "RESULT_SUCCESS";
@@ -207,13 +220,13 @@
         private final ContextHubInfo mQueriedContextHub;
         private final List<ContextHubInfo> mContextHubs;
         private final Set<Long> mNanoAppIds;
-        private final ContextHubManagerAdapter mManager;
+        private final ContextHubManager mManager;
 
         OnQueryCompleteListener(
                 ContextHubInfo queriedContextHub,
                 List<ContextHubInfo> contextHubs,
                 Set<Long> nanoAppIds,
-                ContextHubManagerAdapter manager) {
+                ContextHubManager manager) {
             this.mQueriedContextHub = queriedContextHub;
             this.mContextHubs = contextHubs;
             this.mNanoAppIds = nanoAppIds;
@@ -238,14 +251,14 @@
                                 TAG,
                                 String.format(
                                         "Found valid contexthub: %s", mQueriedContextHub.getId()));
-                        mContextHubClient =
-                                mManager.createClient(
-                                        mQueriedContextHub, ChreCommunication.this, mExecutor);
+                        mContextHubClient = mManager.createClient(mContext, mQueriedContextHub,
+                                mExecutor, ChreCommunication.this);
+                        mChreSupport = true;
                         mCallback.started(true);
                         return;
                     }
                 }
-                Log.e(
+                Log.i(
                         TAG,
                         String.format(
                                 "Didn't find the nanoapp on contexthub: %s",
@@ -263,6 +276,7 @@
             // there isn't a valid context available on this device.
             if (mContextHubs.isEmpty()) {
                 mCallback.started(false);
+                mChreSupport = false;
             }
         }
     }
diff --git a/nearby/service/java/com/android/server/nearby/provider/ChreDiscoveryProvider.java b/nearby/service/java/com/android/server/nearby/provider/ChreDiscoveryProvider.java
index f20c6d8..d0d0de0 100644
--- a/nearby/service/java/com/android/server/nearby/provider/ChreDiscoveryProvider.java
+++ b/nearby/service/java/com/android/server/nearby/provider/ChreDiscoveryProvider.java
@@ -20,10 +20,20 @@
 
 import static com.android.server.nearby.NearbyService.TAG;
 
+import static service.proto.Blefilter.DataElement.ElementType.DE_BATTERY_STATUS;
+import static service.proto.Blefilter.DataElement.ElementType.DE_CONNECTION_STATUS;
+import static service.proto.Blefilter.DataElement.ElementType.DE_FAST_PAIR_ACCOUNT_KEY;
+
+import android.annotation.Nullable;
+import android.content.BroadcastReceiver;
 import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
 import android.hardware.location.NanoAppMessage;
+import android.nearby.DataElement;
 import android.nearby.NearbyDevice;
 import android.nearby.NearbyDeviceParcelable;
+import android.nearby.PresenceDevice;
 import android.nearby.PresenceScanFilter;
 import android.nearby.PublicCredential;
 import android.nearby.ScanFilter;
@@ -31,7 +41,7 @@
 
 import com.android.internal.annotations.VisibleForTesting;
 
-import com.google.protobuf.InvalidProtocolBufferException;
+import com.google.protobuf.ByteString;
 
 import java.util.Collections;
 import java.util.concurrent.Executor;
@@ -47,34 +57,55 @@
     @VisibleForTesting public static final int NANOAPP_MESSAGE_TYPE_FILTER = 3;
     /** @hide */
     @VisibleForTesting public static final int NANOAPP_MESSAGE_TYPE_FILTER_RESULT = 4;
+    /** @hide */
+    @VisibleForTesting public static final int NANOAPP_MESSAGE_TYPE_CONFIG = 5;
 
-    private static final int PRESENCE_UUID = 0xFCF1;
+    private static final int FP_ACCOUNT_KEY_LENGTH = 16;
 
-    private ChreCommunication mChreCommunication;
-    private ChreCallback mChreCallback;
+    private final ChreCommunication mChreCommunication;
+    private final ChreCallback mChreCallback;
     private boolean mChreStarted = false;
     private Blefilter.BleFilters mFilters = null;
-    private int mFilterId;
+    private Context mContext;
+    private final IntentFilter mIntentFilter;
+
+    private final BroadcastReceiver mScreenBroadcastReceiver =
+            new BroadcastReceiver() {
+                @Override
+                public void onReceive(Context context, Intent intent) {
+                    Boolean screenOn = intent.getAction().equals(Intent.ACTION_SCREEN_ON)
+                            || intent.getAction().equals(Intent.ACTION_USER_PRESENT);
+                    Log.d(TAG, String.format(
+                            "[ChreDiscoveryProvider] update nanoapp screen status: %B", screenOn));
+                    sendScreenUpdate(screenOn);
+                }
+            };
 
     public ChreDiscoveryProvider(
             Context context, ChreCommunication chreCommunication, Executor executor) {
         super(context, executor);
+        mContext = context;
         mChreCommunication = chreCommunication;
         mChreCallback = new ChreCallback();
-        mFilterId = 0;
+        mIntentFilter = new IntentFilter();
+    }
+
+    /** Initialize the CHRE discovery provider. */
+    public void init() {
+        mChreCommunication.start(mChreCallback, Collections.singleton(NANOAPP_ID));
     }
 
     @Override
     protected void onStart() {
         Log.d(TAG, "Start CHRE scan");
-        mChreCommunication.start(mChreCallback, Collections.singleton(NANOAPP_ID));
         updateFilters();
     }
 
     @Override
     protected void onStop() {
-        mChreStarted = false;
-        mChreCommunication.stop();
+        Log.d(TAG, "Stop CHRE scan");
+        mScanFilters.clear();
+        updateFilters();
     }
 
     @Override
@@ -83,7 +114,12 @@
         onStart();
     }
 
-    public boolean available() {
+    /**
+     * @return {@code true} if CHRE is available and {@code null} when CHRE availability result
+     * has not been returned
+     */
+    @Nullable
+    public Boolean available() {
         return mChreCommunication.available();
     }
 
@@ -95,22 +131,47 @@
         Blefilter.BleFilters.Builder filtersBuilder = Blefilter.BleFilters.newBuilder();
         for (ScanFilter scanFilter : mScanFilters) {
             PresenceScanFilter presenceScanFilter = (PresenceScanFilter) scanFilter;
-            Blefilter.BleFilter filter =
-                    Blefilter.BleFilter.newBuilder()
-                            .setId(mFilterId)
-                            .setUuid(PRESENCE_UUID)
-                            .setIntent(presenceScanFilter.getPresenceActions().get(0))
-                            .build();
-            filtersBuilder.addFilter(filter);
-            mFilterId++;
+            Blefilter.BleFilter.Builder filterBuilder = Blefilter.BleFilter.newBuilder();
+            for (PublicCredential credential : presenceScanFilter.getCredentials()) {
+                filterBuilder.addCertificate(toProtoPublicCredential(credential));
+            }
+            for (DataElement dataElement : presenceScanFilter.getExtendedProperties()) {
+                if (dataElement.getKey() == DataElement.DataType.ACCOUNT_KEY_DATA) {
+                    filterBuilder.addDataElement(toProtoDataElement(dataElement));
+                }
+            }
+            if (!presenceScanFilter.getPresenceActions().isEmpty()) {
+                filterBuilder.setIntent(presenceScanFilter.getPresenceActions().get(0));
+            }
+            filtersBuilder.addFilter(filterBuilder.build());
         }
-        mFilters = filtersBuilder.build();
         if (mChreStarted) {
-            sendFilters(mFilters);
+            sendFilters(filtersBuilder.build());
             mFilters = null;
         }
     }
 
+    private Blefilter.PublicateCertificate toProtoPublicCredential(PublicCredential credential) {
+        Log.d(TAG, String.format("Returns a PublicCertificate with authenticity key size %d and"
+                + " encrypted metadata key tag size %d", credential.getAuthenticityKey().length,
+                credential.getEncryptedMetadataKeyTag().length));
+        return Blefilter.PublicateCertificate.newBuilder()
+                .setAuthenticityKey(ByteString.copyFrom(credential.getAuthenticityKey()))
+                .setMetadataEncryptionKeyTag(
+                        ByteString.copyFrom(credential.getEncryptedMetadataKeyTag()))
+                .build();
+    }
+
+    private Blefilter.DataElement toProtoDataElement(DataElement dataElement) {
+        return Blefilter.DataElement.newBuilder()
+                        .setKey(
+                                Blefilter.DataElement.ElementType
+                                        .DE_FAST_PAIR_ACCOUNT_KEY)
+                        .setValue(ByteString.copyFrom(dataElement.getValue()))
+                        .setValueLength(FP_ACCOUNT_KEY_LENGTH)
+                        .build();
+    }
+
     private void sendFilters(Blefilter.BleFilters filters) {
         NanoAppMessage message =
                 NanoAppMessage.createMessageToNanoApp(
@@ -120,6 +181,16 @@
         }
     }
 
+    private void sendScreenUpdate(Boolean screenOn) {
+        Blefilter.BleConfig config = Blefilter.BleConfig.newBuilder().setScreenOn(screenOn).build();
+        NanoAppMessage message =
+                NanoAppMessage.createMessageToNanoApp(
+                        NANOAPP_ID, NANOAPP_MESSAGE_TYPE_CONFIG, config.toByteArray());
+        if (!mChreCommunication.sendMessageToNanoApp(message)) {
+            Log.e(TAG, "Failed to send config to CHRE.");
+        }
+    }
+
     private class ChreCallback implements ChreCommunication.ContextHubCommsCallback {
 
         @Override
@@ -127,6 +198,10 @@
             if (success) {
                 synchronized (ChreDiscoveryProvider.this) {
                     Log.i(TAG, "CHRE communication started");
+                    mIntentFilter.addAction(Intent.ACTION_SCREEN_ON);
+                    mIntentFilter.addAction(Intent.ACTION_USER_PRESENT);
+                    mIntentFilter.addAction(Intent.ACTION_SCREEN_OFF);
+                    mContext.registerReceiver(mScreenBroadcastReceiver, mIntentFilter);
                     mChreStarted = true;
                     if (mFilters != null) {
                         sendFilters(mFilters);
@@ -163,15 +238,81 @@
                     Blefilter.BleFilterResults results =
                             Blefilter.BleFilterResults.parseFrom(message.getMessageBody());
                     for (Blefilter.BleFilterResult filterResult : results.getResultList()) {
-                        Blefilter.PublicCredential credential = filterResult.getPublicCredential();
+                        // TODO(b/234653356): There are some duplicate fields set both in
+                        //  PresenceDevice and NearbyDeviceParcelable, cleanup is needed.
+                        byte[] salt = {1};
+                        byte[] secretId = {1};
+                        byte[] authenticityKey = {1};
+                        byte[] publicKey = {1};
+                        byte[] encryptedMetaData = {1};
+                        byte[] encryptedMetaDataTag = {1};
+                        if (filterResult.hasPublicCredential()) {
+                            Blefilter.PublicCredential credential =
+                                    filterResult.getPublicCredential();
+                            secretId = credential.getSecretId().toByteArray();
+                            authenticityKey = credential.getAuthenticityKey().toByteArray();
+                            publicKey = credential.getPublicKey().toByteArray();
+                            encryptedMetaData = credential.getEncryptedMetadata().toByteArray();
+                            encryptedMetaDataTag =
+                                    credential.getEncryptedMetadataTag().toByteArray();
+                        }
+                        PresenceDevice.Builder presenceDeviceBuilder =
+                                new PresenceDevice.Builder(
+                                                String.valueOf(filterResult.hashCode()),
+                                                salt,
+                                                secretId,
+                                                encryptedMetaData)
+                                        .setRssi(filterResult.getRssi())
+                                        .addMedium(NearbyDevice.Medium.BLE);
+                        // Data Elements reported from nanoapp added to Data Elements.
+                        // i.e. Fast Pair account keys, connection status and battery
+                        for (Blefilter.DataElement element : filterResult.getDataElementList()) {
+                            addDataElementsToPresenceDevice(element, presenceDeviceBuilder);
+                        }
+                        // BlE address appended to Data Element.
+                        if (filterResult.hasBluetoothAddress()) {
+                            presenceDeviceBuilder.addExtendedProperty(
+                                    new DataElement(
+                                            DataElement.DataType.BLE_ADDRESS,
+                                            filterResult.getBluetoothAddress().toByteArray()));
+                        }
+                        // BlE TX Power appended to Data Element.
+                        if (filterResult.hasTxPower()) {
+                            presenceDeviceBuilder.addExtendedProperty(
+                                    new DataElement(
+                                            DataElement.DataType.TX_POWER,
+                                            new byte[]{(byte) filterResult.getTxPower()}));
+                        }
+                        // BLE Service data appended to Data Elements.
+                        if (filterResult.hasBleServiceData()) {
+                            // Retrieves the length of the service data from the first byte,
+                            // and then skips the first byte and returns data[1 .. dataLength)
+                            // as the DataElement value.
+                            int dataLength = Byte.toUnsignedInt(
+                                    filterResult.getBleServiceData().byteAt(0));
+                            presenceDeviceBuilder.addExtendedProperty(
+                                    new DataElement(
+                                            DataElement.DataType.BLE_SERVICE_DATA,
+                                            filterResult.getBleServiceData()
+                                                    .substring(1, 1 + dataLength).toByteArray()));
+                        }
+                        // Add action
+                        if (filterResult.hasIntent()) {
+                            presenceDeviceBuilder.addExtendedProperty(
+                                    new DataElement(
+                                            DataElement.DataType.ACTION,
+                                            new byte[]{(byte) filterResult.getIntent()}));
+                        }
+
                         PublicCredential publicCredential =
                                 new PublicCredential.Builder(
-                                                credential.getSecretId().toByteArray(),
-                                                credential.getAuthenticityKey().toByteArray(),
-                                                credential.getPublicKey().toByteArray(),
-                                                credential.getEncryptedMetadata().toByteArray(),
-                                                credential.getEncryptedMetadataTag().toByteArray())
+                                                secretId,
+                                                authenticityKey,
+                                                publicKey,
+                                                encryptedMetaData,
+                                                encryptedMetaDataTag)
                                         .build();
+
                         NearbyDeviceParcelable device =
                                 new NearbyDeviceParcelable.Builder()
                                         .setScanType(SCAN_TYPE_NEARBY_PRESENCE)
@@ -180,15 +321,40 @@
                                         .setRssi(filterResult.getRssi())
                                         .setAction(filterResult.getIntent())
                                         .setPublicCredential(publicCredential)
+                                        .setPresenceDevice(presenceDeviceBuilder.build())
+                                        .setEncryptionKeyTag(encryptedMetaDataTag)
                                         .build();
                         mExecutor.execute(() -> mListener.onNearbyDeviceDiscovered(device));
                     }
-                } catch (InvalidProtocolBufferException e) {
-                    Log.e(
-                            TAG,
-                            String.format("Failed to decode the filter result %s", e.toString()));
+                } catch (Exception e) {
+                    Log.e(TAG, String.format("Failed to decode the filter result %s", e));
                 }
             }
         }
+
+        private void addDataElementsToPresenceDevice(Blefilter.DataElement element,
+                PresenceDevice.Builder presenceDeviceBuilder) {
+            int endIndex = element.hasValueLength() ? element.getValueLength() :
+                    element.getValue().size();
+            switch (element.getKey()) {
+                case DE_FAST_PAIR_ACCOUNT_KEY:
+                    presenceDeviceBuilder.addExtendedProperty(
+                            new DataElement(DataElement.DataType.ACCOUNT_KEY_DATA,
+                                    element.getValue().substring(0, endIndex).toByteArray()));
+                    break;
+                case DE_CONNECTION_STATUS:
+                    presenceDeviceBuilder.addExtendedProperty(
+                            new DataElement(DataElement.DataType.CONNECTION_STATUS,
+                                    element.getValue().substring(0, endIndex).toByteArray()));
+                    break;
+                case DE_BATTERY_STATUS:
+                    presenceDeviceBuilder.addExtendedProperty(
+                            new DataElement(DataElement.DataType.BATTERY,
+                                    element.getValue().substring(0, endIndex).toByteArray()));
+                    break;
+                default:
+                    break;
+            }
+        }
     }
 }
diff --git a/nearby/service/java/com/android/server/nearby/provider/DiscoveryProviderManager.java b/nearby/service/java/com/android/server/nearby/provider/DiscoveryProviderManager.java
index bdeab51..b7574c9 100644
--- a/nearby/service/java/com/android/server/nearby/provider/DiscoveryProviderManager.java
+++ b/nearby/service/java/com/android/server/nearby/provider/DiscoveryProviderManager.java
@@ -23,8 +23,10 @@
 import android.annotation.Nullable;
 import android.app.AppOpsManager;
 import android.content.Context;
+import android.nearby.DataElement;
 import android.nearby.IScanListener;
 import android.nearby.NearbyDeviceParcelable;
+import android.nearby.NearbyManager;
 import android.nearby.PresenceScanFilter;
 import android.nearby.ScanFilter;
 import android.nearby.ScanRequest;
@@ -33,6 +35,7 @@
 import android.util.Log;
 
 import com.android.internal.annotations.GuardedBy;
+import com.android.internal.annotations.VisibleForTesting;
 import com.android.server.nearby.injector.Injector;
 import com.android.server.nearby.metrics.NearbyMetrics;
 import com.android.server.nearby.presence.PresenceDiscoveryResult;
@@ -92,10 +95,9 @@
                                                     scanFilter.getType()
                                                             == SCAN_TYPE_NEARBY_PRESENCE)
                                     .collect(Collectors.toList());
-                    Log.i(
-                            TAG,
-                            String.format("match with filters size: %d", presenceFilters.size()));
                     if (!presenceFilterMatches(nearbyDevice, presenceFilters)) {
+                        Log.d(TAG, "presence filter does not match for "
+                                + "the scanned Presence Device");
                         continue;
                     }
                 }
@@ -119,40 +121,73 @@
         Executor executor = Executors.newSingleThreadExecutor();
         mChreDiscoveryProvider =
                 new ChreDiscoveryProvider(
-                        mContext, new ChreCommunication(injector, executor), executor);
+                        mContext, new ChreCommunication(injector, mContext, executor), executor);
         mScanTypeScanListenerRecordMap = new HashMap<>();
         mInjector = injector;
     }
 
+    @VisibleForTesting
+    DiscoveryProviderManager(Context context, Injector injector,
+            BleDiscoveryProvider bleDiscoveryProvider,
+            ChreDiscoveryProvider chreDiscoveryProvider,
+            Map<IBinder, ScanListenerRecord> scanTypeScanListenerRecordMap) {
+        mContext = context;
+        mInjector = injector;
+        mBleDiscoveryProvider = bleDiscoveryProvider;
+        mChreDiscoveryProvider = chreDiscoveryProvider;
+        mScanTypeScanListenerRecordMap = scanTypeScanListenerRecordMap;
+    }
+
+    /** Called after boot completed. */
+    public void init() {
+        if (mInjector.getContextHubManager() != null) {
+            mChreDiscoveryProvider.init();
+        }
+        mChreDiscoveryProvider.getController().setListener(this);
+    }
+
     /**
      * Registers the listener in the manager and starts scan according to the requested scan mode.
      */
-    public boolean registerScanListener(ScanRequest scanRequest, IScanListener listener,
+    @NearbyManager.ScanStatus
+    public int registerScanListener(ScanRequest scanRequest, IScanListener listener,
             CallerIdentity callerIdentity) {
         synchronized (mLock) {
+            ScanListenerDeathRecipient deathRecipient = (listener != null)
+                    ? new ScanListenerDeathRecipient(listener) : null;
             IBinder listenerBinder = listener.asBinder();
+            if (listenerBinder != null && deathRecipient != null) {
+                try {
+                    listenerBinder.linkToDeath(deathRecipient, 0);
+                } catch (RemoteException e) {
+                    throw new IllegalArgumentException("Can't link to scan listener's death");
+                }
+            }
             if (mScanTypeScanListenerRecordMap.containsKey(listener.asBinder())) {
                 ScanRequest savedScanRequest =
                         mScanTypeScanListenerRecordMap.get(listenerBinder).getScanRequest();
                 if (scanRequest.equals(savedScanRequest)) {
                     Log.d(TAG, "Already registered the scanRequest: " + scanRequest);
-                    return true;
+                    return NearbyManager.ScanStatus.SUCCESS;
                 }
             }
             ScanListenerRecord scanListenerRecord =
-                    new ScanListenerRecord(scanRequest, listener, callerIdentity);
+                    new ScanListenerRecord(scanRequest, listener, callerIdentity, deathRecipient);
             mScanTypeScanListenerRecordMap.put(listenerBinder, scanListenerRecord);
 
-            if (!startProviders(scanRequest)) {
-                return false;
+            Boolean started = startProviders(scanRequest);
+            if (started == null) {
+                return NearbyManager.ScanStatus.UNKNOWN;
             }
-
+            if (!started) {
+                return NearbyManager.ScanStatus.ERROR;
+            }
             NearbyMetrics.logScanStarted(scanListenerRecord.hashCode(), scanRequest);
             if (mScanMode < scanRequest.getScanMode()) {
                 mScanMode = scanRequest.getScanMode();
                 invalidateProviderScanMode();
             }
-            return true;
+            return NearbyManager.ScanStatus.SUCCESS;
         }
     }
 
@@ -172,6 +207,10 @@
 
             ScanListenerRecord removedRecord =
                     mScanTypeScanListenerRecordMap.remove(listenerBinder);
+            ScanListenerDeathRecipient deathRecipient = removedRecord.getDeathRecipient();
+            if (listenerBinder != null && deathRecipient != null) {
+                listenerBinder.unlinkToDeath(removedRecord.getDeathRecipient(), 0);
+            }
             Log.v(TAG, "DiscoveryProviderManager unregistered scan listener.");
             NearbyMetrics.logScanStopped(removedRecord.hashCode(), removedRecord.getScanRequest());
             if (mScanTypeScanListenerRecordMap.isEmpty()) {
@@ -203,34 +242,91 @@
         }
     }
 
-    // Returns false when fail to start all the providers. Returns true if any one of the provider
-    // starts successfully.
-    private boolean startProviders(ScanRequest scanRequest) {
-        if (scanRequest.isBleEnabled()) {
-            if (mChreDiscoveryProvider.available()
-                    && scanRequest.getScanType() == SCAN_TYPE_NEARBY_PRESENCE) {
-                startChreProvider();
-            } else {
-                startBleProvider(scanRequest);
+    /**
+     * @return {@code null} when all providers are initializing
+     * {@code false} when fail to start all the providers
+     * {@code true} when any one of the provider starts successfully
+     */
+    @VisibleForTesting
+    @Nullable
+    Boolean startProviders(ScanRequest scanRequest) {
+        if (!scanRequest.isBleEnabled()) {
+            Log.w(TAG, "failed to start any provider because client disabled BLE");
+            return false;
+        }
+        List<ScanFilter> scanFilters = getPresenceScanFilters();
+        boolean chreOnly = isChreOnly(scanFilters);
+        Boolean chreAvailable = mChreDiscoveryProvider.available();
+        if (chreAvailable == null) {
+            if (chreOnly) {
+                Log.w(TAG, "client wants CHRE only and Nearby service is still querying CHRE"
+                        + " status");
+                return null;
             }
+            startBleProvider(scanFilters);
             return true;
         }
+
+        if (!chreAvailable) {
+            if (chreOnly) {
+                Log.w(TAG, "failed to start any provider because client wants CHRE only and CHRE"
+                        + " is not available");
+                return false;
+            }
+            startBleProvider(scanFilters);
+            return true;
+        }
+
+        if (scanRequest.getScanType() == SCAN_TYPE_NEARBY_PRESENCE) {
+            startChreProvider(scanFilters);
+            return true;
+        }
+
+        startBleProvider(scanFilters);
+        return true;
+    }
+
+    private static boolean isChreOnly(List<ScanFilter> scanFilters) {
+        for (ScanFilter scanFilter : scanFilters) {
+            List<DataElement> dataElements =
+                    ((PresenceScanFilter) scanFilter).getExtendedProperties();
+            for (DataElement dataElement : dataElements) {
+                if (dataElement.getKey() != DataElement.DataType.SCAN_MODE) {
+                    continue;
+                }
+                byte[] scanModeValue = dataElement.getValue();
+                if (scanModeValue == null || scanModeValue.length == 0) {
+                    break;
+                }
+                if (Byte.toUnsignedInt(scanModeValue[0]) == ScanRequest.SCAN_MODE_CHRE_ONLY) {
+                    return true;
+                }
+            }
+
+        }
         return false;
     }
 
-    private void startBleProvider(ScanRequest scanRequest) {
+    private void startBleProvider(List<ScanFilter> scanFilters) {
         if (!mBleDiscoveryProvider.getController().isStarted()) {
             Log.d(TAG, "DiscoveryProviderManager starts Ble scanning.");
-            mBleDiscoveryProvider.getController().start();
             mBleDiscoveryProvider.getController().setListener(this);
-            mBleDiscoveryProvider.getController().setProviderScanMode(scanRequest.getScanMode());
+            mBleDiscoveryProvider.getController().setProviderScanMode(mScanMode);
+            mBleDiscoveryProvider.getController().setProviderScanFilters(scanFilters);
+            mBleDiscoveryProvider.getController().start();
         }
     }
 
-    private void startChreProvider() {
+    @VisibleForTesting
+    void startChreProvider(List<ScanFilter> scanFilters) {
         Log.d(TAG, "DiscoveryProviderManager starts CHRE scanning.");
+        mChreDiscoveryProvider.getController().setProviderScanFilters(scanFilters);
+        mChreDiscoveryProvider.getController().setProviderScanMode(mScanMode);
+        mChreDiscoveryProvider.getController().start();
+    }
+
+    private List<ScanFilter> getPresenceScanFilters() {
         synchronized (mLock) {
-            mChreDiscoveryProvider.getController().setListener(this);
             List<ScanFilter> scanFilters = new ArrayList();
             for (IBinder listenerBinder : mScanTypeScanListenerRecordMap.keySet()) {
                 ScanListenerRecord record = mScanTypeScanListenerRecordMap.get(listenerBinder);
@@ -242,9 +338,7 @@
                                 .collect(Collectors.toList());
                 scanFilters.addAll(presenceFilters);
             }
-            mChreDiscoveryProvider.getController().setProviderScanFilters(scanFilters);
-            mChreDiscoveryProvider.getController().setProviderScanMode(mScanMode);
-            mChreDiscoveryProvider.getController().start();
+            return scanFilters;
         }
     }
 
@@ -261,7 +355,8 @@
         mChreDiscoveryProvider.getController().stop();
     }
 
-    private void invalidateProviderScanMode() {
+    @VisibleForTesting
+    void invalidateProviderScanMode() {
         if (mBleDiscoveryProvider.getController().isStarted()) {
             mBleDiscoveryProvider.getController().setProviderScanMode(mScanMode);
         } else {
@@ -272,7 +367,8 @@
         }
     }
 
-    private static boolean presenceFilterMatches(
+    @VisibleForTesting
+    static boolean presenceFilterMatches(
             NearbyDeviceParcelable device, List<ScanFilter> scanFilters) {
         if (scanFilters.isEmpty()) {
             return true;
@@ -287,7 +383,22 @@
         return false;
     }
 
-    private static class ScanListenerRecord {
+    class ScanListenerDeathRecipient implements IBinder.DeathRecipient {
+        public IScanListener listener;
+
+        ScanListenerDeathRecipient(IScanListener listener) {
+            this.listener = listener;
+        }
+
+        @Override
+        public void binderDied() {
+            Log.d(TAG, "Binder is dead - unregistering scan listener");
+            unregisterScanListener(listener);
+        }
+    }
+
+    @VisibleForTesting
+    static class ScanListenerRecord {
 
         private final ScanRequest mScanRequest;
 
@@ -295,11 +406,14 @@
 
         private final CallerIdentity mCallerIdentity;
 
+        private final ScanListenerDeathRecipient mDeathRecipient;
+
         ScanListenerRecord(ScanRequest scanRequest, IScanListener iScanListener,
-                CallerIdentity callerIdentity) {
+                CallerIdentity callerIdentity, ScanListenerDeathRecipient deathRecipient) {
             mScanListener = iScanListener;
             mScanRequest = scanRequest;
             mCallerIdentity = callerIdentity;
+            mDeathRecipient = deathRecipient;
         }
 
         IScanListener getScanListener() {
@@ -314,6 +428,10 @@
             return mCallerIdentity;
         }
 
+        ScanListenerDeathRecipient getDeathRecipient()  {
+            return mDeathRecipient;
+        }
+
         @Override
         public boolean equals(Object other) {
             if (other instanceof ScanListenerRecord) {
diff --git a/nearby/service/java/com/android/server/nearby/provider/FastPairDataProvider.java b/nearby/service/java/com/android/server/nearby/provider/FastPairDataProvider.java
index 0f99a2f..d925f07 100644
--- a/nearby/service/java/com/android/server/nearby/provider/FastPairDataProvider.java
+++ b/nearby/service/java/com/android/server/nearby/provider/FastPairDataProvider.java
@@ -30,7 +30,7 @@
 
 import androidx.annotation.WorkerThread;
 
-import com.android.server.nearby.common.bloomfilter.BloomFilter;
+import com.android.internal.annotations.VisibleForTesting;
 import com.android.server.nearby.fastpair.footprint.FastPairUploadInfo;
 
 import java.util.ArrayList;
@@ -80,6 +80,11 @@
         }
     }
 
+    @VisibleForTesting
+    void setProxyDataProvider(ProxyFastPairDataProvider proxyFastPairDataProvider) {
+        this.mProxyFastPairDataProvider = proxyFastPairDataProvider;
+    }
+
     /**
      * Loads FastPairAntispoofKeyDeviceMetadata.
      *
@@ -136,14 +141,6 @@
     }
 
     /**
-     * Get recognized device from bloom filter.
-     */
-    public Data.FastPairDeviceWithAccountKey getRecognizedDevice(BloomFilter bloomFilter,
-            byte[] salt) {
-        return Data.FastPairDeviceWithAccountKey.newBuilder().build();
-    }
-
-    /**
      * Loads FastPair device accountKeys for a given account, but not other detailed fields.
      *
      * @throws IllegalStateException If ProxyFastPairDataProvider is not available.
diff --git a/nearby/service/java/com/android/server/nearby/util/DataUtils.java b/nearby/service/java/com/android/server/nearby/util/DataUtils.java
index 8bb83e9..c3bae08 100644
--- a/nearby/service/java/com/android/server/nearby/util/DataUtils.java
+++ b/nearby/service/java/com/android/server/nearby/util/DataUtils.java
@@ -57,11 +57,9 @@
      */
     public static String toString(ScanFastPairStoreItem item) {
         return "ScanFastPairStoreItem=[address:" + item.getAddress()
-                + ", actionUr:" + item.getActionUrl()
+                + ", actionUrl:" + item.getActionUrl()
                 + ", deviceName:" + item.getDeviceName()
-                + ", iconPng:" + item.getIconPng()
                 + ", iconFifeUrl:" + item.getIconFifeUrl()
-                + ", antiSpoofingKeyPair:" + item.getAntiSpoofingPublicKey()
                 + ", fastPairStrings:" + toString(item.getFastPairStrings())
                 + "]";
     }
diff --git a/nearby/service/java/com/android/server/nearby/util/FastPairDecoder.java b/nearby/service/java/com/android/server/nearby/util/FastPairDecoder.java
deleted file mode 100644
index 6021ff6..0000000
--- a/nearby/service/java/com/android/server/nearby/util/FastPairDecoder.java
+++ /dev/null
@@ -1,258 +0,0 @@
-/*
- * Copyright (C) 2022 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.server.nearby.util;
-
-import android.annotation.Nullable;
-import android.bluetooth.le.ScanRecord;
-import android.os.ParcelUuid;
-import android.util.SparseArray;
-
-import com.android.server.nearby.common.ble.BleFilter;
-import com.android.server.nearby.common.ble.BleRecord;
-
-import java.util.Arrays;
-
-/**
- * Parses Fast Pair information out of {@link BleRecord}s.
- *
- * <p>There are 2 different packet formats that are supported, which is used can be determined by
- * packet length:
- *
- * <p>For 3-byte packets, the full packet is the model ID.
- *
- * <p>For all other packets, the first byte is the header, followed by the model ID, followed by
- * zero or more extra fields. Each field has its own header byte followed by the field value. The
- * packet header is formatted as 0bVVVLLLLR (V = version, L = model ID length, R = reserved) and
- * each extra field header is 0bLLLLTTTT (L = field length, T = field type).
- */
-public class FastPairDecoder {
-
-    private static final int FIELD_TYPE_BLOOM_FILTER = 0;
-    private static final int FIELD_TYPE_BLOOM_FILTER_SALT = 1;
-    private static final int FIELD_TYPE_BLOOM_FILTER_NO_NOTIFICATION = 2;
-    private static final int FIELD_TYPE_BATTERY = 3;
-    private static final int FIELD_TYPE_BATTERY_NO_NOTIFICATION = 4;
-    public static final int FIELD_TYPE_CONNECTION_STATE = 5;
-    private static final int FIELD_TYPE_RANDOM_RESOLVABLE_DATA = 6;
-
-
-    /** FE2C is the 16-bit Service UUID. The rest is the base UUID. See BluetoothUuid (hidden). */
-    private static final ParcelUuid FAST_PAIR_SERVICE_PARCEL_UUID =
-            ParcelUuid.fromString("0000FE2C-0000-1000-8000-00805F9B34FB");
-
-    /** The filter you use to scan for Fast Pair BLE advertisements. */
-    public static final BleFilter FILTER =
-            new BleFilter.Builder().setServiceData(FAST_PAIR_SERVICE_PARCEL_UUID,
-                    new byte[0]).build();
-
-    // NOTE: Ensure that all bitmasks are always ints, not bytes so that bitshifting works correctly
-    // without needing worry about signing errors.
-    private static final int HEADER_VERSION_BITMASK = 0b11100000;
-    private static final int HEADER_LENGTH_BITMASK = 0b00011110;
-    private static final int HEADER_VERSION_OFFSET = 5;
-    private static final int HEADER_LENGTH_OFFSET = 1;
-
-    private static final int EXTRA_FIELD_LENGTH_BITMASK = 0b11110000;
-    private static final int EXTRA_FIELD_TYPE_BITMASK = 0b00001111;
-    private static final int EXTRA_FIELD_LENGTH_OFFSET = 4;
-    private static final int EXTRA_FIELD_TYPE_OFFSET = 0;
-
-    private static final int MIN_ID_LENGTH = 3;
-    private static final int MAX_ID_LENGTH = 14;
-    private static final int HEADER_INDEX = 0;
-    private static final int HEADER_LENGTH = 1;
-    private static final int FIELD_HEADER_LENGTH = 1;
-
-    // Not using java.util.IllegalFormatException because it is unchecked.
-    private static class IllegalFormatException extends Exception {
-        private IllegalFormatException(String message) {
-            super(message);
-        }
-    }
-
-    /**
-     * Gets model id data from broadcast
-     */
-    @Nullable
-    public static byte[] getModelId(@Nullable byte[] serviceData) {
-        if (serviceData == null) {
-            return null;
-        }
-
-        if (serviceData.length >= MIN_ID_LENGTH) {
-            if (serviceData.length == MIN_ID_LENGTH) {
-                // If the length == 3, all bytes are the ID. See flag docs for more about
-                // endianness.
-                return serviceData;
-            } else {
-                // Otherwise, the first byte is a header which contains the length of the big-endian
-                // model ID that follows. The model ID will be trimmed if it contains leading zeros.
-                int idIndex = 1;
-                int end = idIndex + getIdLength(serviceData);
-                while (serviceData[idIndex] == 0 && end - idIndex > MIN_ID_LENGTH) {
-                    idIndex++;
-                }
-                return Arrays.copyOfRange(serviceData, idIndex, end);
-            }
-        }
-        return null;
-    }
-
-    /** Gets the FastPair service data array if available, otherwise returns null. */
-    @Nullable
-    public static byte[] getServiceDataArray(BleRecord bleRecord) {
-        return bleRecord.getServiceData(FAST_PAIR_SERVICE_PARCEL_UUID);
-    }
-
-    /** Gets the FastPair service data array if available, otherwise returns null. */
-    @Nullable
-    public static byte[] getServiceDataArray(ScanRecord scanRecord) {
-        return scanRecord.getServiceData(FAST_PAIR_SERVICE_PARCEL_UUID);
-    }
-
-    /** Gets the bloom filter from the extra fields if available, otherwise returns null. */
-    @Nullable
-    public static byte[] getBloomFilter(@Nullable byte[] serviceData) {
-        return getExtraField(serviceData, FIELD_TYPE_BLOOM_FILTER);
-    }
-
-    /** Gets the bloom filter salt from the extra fields if available, otherwise returns null. */
-    @Nullable
-    public static byte[] getBloomFilterSalt(byte[] serviceData) {
-        return getExtraField(serviceData, FIELD_TYPE_BLOOM_FILTER_SALT);
-    }
-
-    /**
-     * Gets the suppress notification with bloom filter from the extra fields if available,
-     * otherwise returns null.
-     */
-    @Nullable
-    public static byte[] getBloomFilterNoNotification(@Nullable byte[] serviceData) {
-        return getExtraField(serviceData, FIELD_TYPE_BLOOM_FILTER_NO_NOTIFICATION);
-    }
-
-    /**
-     * Get random resolvableData
-     */
-    @Nullable
-    public static byte[] getRandomResolvableData(byte[] serviceData) {
-        return getExtraField(serviceData, FIELD_TYPE_RANDOM_RESOLVABLE_DATA);
-    }
-
-    @Nullable
-    private static byte[] getExtraField(@Nullable byte[] serviceData, int fieldId) {
-        if (serviceData == null || serviceData.length < HEADER_INDEX + HEADER_LENGTH) {
-            return null;
-        }
-        try {
-            return getExtraFields(serviceData).get(fieldId);
-        } catch (IllegalFormatException e) {
-            return null;
-        }
-    }
-
-    /** Gets extra field data at the end of the packet, defined by the extra field header. */
-    private static SparseArray<byte[]> getExtraFields(byte[] serviceData)
-            throws IllegalFormatException {
-        SparseArray<byte[]> extraFields = new SparseArray<>();
-        if (getVersion(serviceData) != 0) {
-            return extraFields;
-        }
-        int headerIndex = getFirstExtraFieldHeaderIndex(serviceData);
-        while (headerIndex < serviceData.length) {
-            int length = getExtraFieldLength(serviceData, headerIndex);
-            int index = headerIndex + FIELD_HEADER_LENGTH;
-            int type = getExtraFieldType(serviceData, headerIndex);
-            int end = index + length;
-            if (extraFields.get(type) == null) {
-                if (end <= serviceData.length) {
-                    extraFields.put(type, Arrays.copyOfRange(serviceData, index, end));
-                } else {
-                    throw new IllegalFormatException(
-                            "Invalid length, " + end + " is longer than service data size "
-                                    + serviceData.length);
-                }
-            }
-            headerIndex = end;
-        }
-        return extraFields;
-    }
-
-    /** Checks whether or not a valid ID is included in the service data packet. */
-    public static boolean hasBeaconIdBytes(BleRecord bleRecord) {
-        byte[] serviceData = bleRecord.getServiceData(FAST_PAIR_SERVICE_PARCEL_UUID);
-        return checkModelId(serviceData);
-    }
-
-    /** Check whether byte array is FastPair model id or not. */
-    public static boolean checkModelId(@Nullable byte[] scanResult) {
-        return scanResult != null
-                // The 3-byte format has no header byte (all bytes are the ID).
-                && (scanResult.length == MIN_ID_LENGTH
-                // Header byte exists. We support only format version 0. (A different version
-                // indicates
-                // a breaking change in the format.)
-                || (scanResult.length > MIN_ID_LENGTH
-                && getVersion(scanResult) == 0
-                && isIdLengthValid(scanResult)));
-    }
-
-    /** Checks whether or not bloom filter is included in the service data packet. */
-    public static boolean hasBloomFilter(BleRecord bleRecord) {
-        return (getBloomFilter(getServiceDataArray(bleRecord)) != null
-                || getBloomFilterNoNotification(getServiceDataArray(bleRecord)) != null);
-    }
-
-    /** Checks whether or not bloom filter is included in the service data packet. */
-    public static boolean hasBloomFilter(ScanRecord scanRecord) {
-        return (getBloomFilter(getServiceDataArray(scanRecord)) != null
-                || getBloomFilterNoNotification(getServiceDataArray(scanRecord)) != null);
-    }
-
-    private static int getVersion(byte[] serviceData) {
-        return serviceData.length == MIN_ID_LENGTH
-                ? 0
-                : (serviceData[HEADER_INDEX] & HEADER_VERSION_BITMASK) >> HEADER_VERSION_OFFSET;
-    }
-
-    private static int getIdLength(byte[] serviceData) {
-        return serviceData.length == MIN_ID_LENGTH
-                ? MIN_ID_LENGTH
-                : (serviceData[HEADER_INDEX] & HEADER_LENGTH_BITMASK) >> HEADER_LENGTH_OFFSET;
-    }
-
-    private static int getFirstExtraFieldHeaderIndex(byte[] serviceData) {
-        return HEADER_INDEX + HEADER_LENGTH + getIdLength(serviceData);
-    }
-
-    private static int getExtraFieldLength(byte[] serviceData, int extraFieldIndex) {
-        return (serviceData[extraFieldIndex] & EXTRA_FIELD_LENGTH_BITMASK)
-                >> EXTRA_FIELD_LENGTH_OFFSET;
-    }
-
-    private static int getExtraFieldType(byte[] serviceData, int extraFieldIndex) {
-        return (serviceData[extraFieldIndex] & EXTRA_FIELD_TYPE_BITMASK) >> EXTRA_FIELD_TYPE_OFFSET;
-    }
-
-    private static boolean isIdLengthValid(byte[] serviceData) {
-        int idLength = getIdLength(serviceData);
-        return MIN_ID_LENGTH <= idLength
-                && idLength <= MAX_ID_LENGTH
-                && idLength + HEADER_LENGTH <= serviceData.length;
-    }
-}
-
diff --git a/nearby/service/java/com/android/server/nearby/util/encryption/Cryptor.java b/nearby/service/java/com/android/server/nearby/util/encryption/Cryptor.java
new file mode 100644
index 0000000..3c5132d
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/util/encryption/Cryptor.java
@@ -0,0 +1,149 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.util.encryption;
+
+import static com.android.server.nearby.NearbyService.TAG;
+
+import android.util.Log;
+
+import androidx.annotation.Nullable;
+
+import java.security.InvalidKeyException;
+import java.security.NoSuchAlgorithmException;
+
+import javax.crypto.Mac;
+import javax.crypto.spec.SecretKeySpec;
+
+/** Class for encryption/decryption functionality. */
+public abstract class Cryptor {
+
+    /** AES only supports key sizes of 16, 24 or 32 bytes. */
+    static final int AUTHENTICITY_KEY_BYTE_SIZE = 16;
+
+    private static final String HMAC_SHA256_ALGORITHM = "HmacSHA256";
+
+    /**
+     * Encrypt the provided data blob.
+     *
+     * @param data data blob to be encrypted.
+     * @param salt used for IV
+     * @param secretKeyBytes secrete key accessed from credentials
+     * @return encrypted data, {@code null} if failed to encrypt.
+     */
+    @Nullable
+    public byte[] encrypt(byte[] data, byte[] salt, byte[] secretKeyBytes) {
+        return data;
+    }
+
+    /**
+     * Decrypt the original data blob from the provided byte array.
+     *
+     * @param encryptedData data blob to be decrypted.
+     * @param salt used for IV
+     * @param secretKeyBytes secrete key accessed from credentials
+     * @return decrypted data, {@code null} if failed to decrypt.
+     */
+    @Nullable
+    public byte[] decrypt(byte[] encryptedData, byte[] salt, byte[] secretKeyBytes) {
+        return encryptedData;
+    }
+
+    /**
+     * Generates a digital signature for the data.
+     *
+     * @return signature {@code null} if failed to sign
+     */
+    @Nullable
+    public byte[] sign(byte[] data, byte[] key) {
+        return new byte[0];
+    }
+
+    /**
+     * Verifies the signature generated by data and key, with the original signed data
+     */
+    public boolean verify(byte[] data, byte[] key, byte[] signature) {
+        return true;
+    }
+
+    /**
+     * @return length of the signature generated
+     */
+    public int getSignatureLength() {
+        return 0;
+    }
+
+    /**
+     * A HAMC sha256 based HKDF algorithm to pseudo randomly hash data and salt into a byte array of
+     * given size.
+     */
+    // Based on google3/third_party/tink/java/src/main/java/com/google/crypto/tink/subtle/Hkdf.java
+    @Nullable
+    static byte[] computeHkdf(byte[] ikm, byte[] salt, int size) {
+        Mac mac;
+        try {
+            mac = Mac.getInstance(HMAC_SHA256_ALGORITHM);
+        } catch (NoSuchAlgorithmException e) {
+            Log.w(TAG, "HMAC_SHA256_ALGORITHM is not supported.", e);
+            return null;
+        }
+
+        if (size > 255 * mac.getMacLength()) {
+            Log.w(TAG, "Size too large.");
+            return null;
+        }
+
+        if (salt.length == 0) {
+            Log.w(TAG, "Salt cannot be empty.");
+            return null;
+        }
+
+        try {
+            mac.init(new SecretKeySpec(salt, HMAC_SHA256_ALGORITHM));
+        } catch (InvalidKeyException e) {
+            Log.w(TAG, "Invalid key.", e);
+            return null;
+        }
+
+        byte[] prk = mac.doFinal(ikm);
+        byte[] result = new byte[size];
+        try {
+            mac.init(new SecretKeySpec(prk, HMAC_SHA256_ALGORITHM));
+        } catch (InvalidKeyException e) {
+            Log.w(TAG, "Invalid key.", e);
+            return null;
+        }
+
+        byte[] digest = new byte[0];
+        int ctr = 1;
+        int pos = 0;
+        while (true) {
+            mac.update(digest);
+            mac.update((byte) ctr);
+            digest = mac.doFinal();
+            if (pos + digest.length < size) {
+                System.arraycopy(digest, 0, result, pos, digest.length);
+                pos += digest.length;
+                ctr++;
+            } else {
+                System.arraycopy(digest, 0, result, pos, size - pos);
+                break;
+            }
+        }
+
+        return result;
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/util/encryption/CryptorImpFake.java b/nearby/service/java/com/android/server/nearby/util/encryption/CryptorImpFake.java
new file mode 100644
index 0000000..1c0ec9e
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/util/encryption/CryptorImpFake.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.util.encryption;
+
+import androidx.annotation.Nullable;
+
+/**
+ * A Cryptor that returns the original data without actual encryption
+ */
+public class CryptorImpFake extends Cryptor {
+    // Lazily instantiated when {@link #getInstance()} is called.
+    @Nullable
+    private static CryptorImpFake sCryptor;
+
+    /** Returns an instance of CryptorImpFake. */
+    public static CryptorImpFake getInstance() {
+        if (sCryptor == null) {
+            sCryptor = new CryptorImpFake();
+        }
+        return sCryptor;
+    }
+
+    private CryptorImpFake() {
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/util/encryption/CryptorImpIdentityV1.java b/nearby/service/java/com/android/server/nearby/util/encryption/CryptorImpIdentityV1.java
new file mode 100644
index 0000000..b0e19b4
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/util/encryption/CryptorImpIdentityV1.java
@@ -0,0 +1,208 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.util.encryption;
+
+import static com.android.server.nearby.NearbyService.TAG;
+
+import android.security.keystore.KeyProperties;
+import android.util.Log;
+
+import androidx.annotation.Nullable;
+
+import com.android.internal.annotations.VisibleForTesting;
+
+import java.security.InvalidAlgorithmParameterException;
+import java.security.InvalidKeyException;
+import java.security.NoSuchAlgorithmException;
+import java.util.Arrays;
+
+import javax.crypto.BadPaddingException;
+import javax.crypto.Cipher;
+import javax.crypto.IllegalBlockSizeException;
+import javax.crypto.NoSuchPaddingException;
+import javax.crypto.SecretKey;
+import javax.crypto.spec.IvParameterSpec;
+import javax.crypto.spec.SecretKeySpec;
+
+/**
+ * {@link android.nearby.BroadcastRequest#PRESENCE_VERSION_V1} for identity
+ * encryption and decryption.
+ */
+public class CryptorImpIdentityV1 extends Cryptor {
+
+    // 3 16 byte arrays known by both the encryptor and decryptor.
+    private static final byte[] EK_IV =
+            new byte[] {14, -123, -39, 42, 109, 127, 83, 27, 27, 11, 91, -38, 92, 17, -84, 66};
+    private static final byte[] ESALT_IV =
+            new byte[] {46, 83, -19, 10, -127, -31, -31, 12, 31, 76, 63, -9, 33, -66, 15, -10};
+    private static final byte[] KTAG_IV =
+            {-22, -83, -6, 67, 16, -99, -13, -9, 8, -3, -16, 37, -75, 47, 1, -56};
+
+    /** Length of encryption key required by AES/GCM encryption. */
+    private static final int ENCRYPTION_KEY_SIZE = 32;
+
+    /** Length of salt required by AES/GCM encryption. */
+    private static final int AES_CTR_IV_SIZE = 16;
+
+    /** Length HMAC tag */
+    public static final int HMAC_TAG_SIZE = 8;
+
+    /**
+     * In the form of "algorithm/mode/padding". Must be the same across broadcast and scan devices.
+     */
+    private static final String CIPHER_ALGORITHM = "AES/CTR/NoPadding";
+
+    @VisibleForTesting
+    static final String ENCRYPT_ALGORITHM = KeyProperties.KEY_ALGORITHM_AES;
+
+    // Lazily instantiated when {@link #getInstance()} is called.
+    @Nullable private static CryptorImpIdentityV1 sCryptor;
+
+    /** Returns an instance of CryptorImpIdentityV1. */
+    public static CryptorImpIdentityV1 getInstance() {
+        if (sCryptor == null) {
+            sCryptor = new CryptorImpIdentityV1();
+        }
+        return sCryptor;
+    }
+
+    @Nullable
+    @Override
+    public byte[] encrypt(byte[] data, byte[] salt, byte[] authenticityKey) {
+        if (authenticityKey.length != AUTHENTICITY_KEY_BYTE_SIZE) {
+            Log.w(TAG, "Illegal authenticity key size");
+            return null;
+        }
+
+        // Generates a 32 bytes encryption key from authenticity_key
+        byte[] encryptionKey = Cryptor.computeHkdf(authenticityKey, EK_IV, ENCRYPTION_KEY_SIZE);
+        if (encryptionKey == null) {
+            Log.e(TAG, "Failed to generate encryption key.");
+            return null;
+        }
+
+        // Encrypts the data using the encryption key
+        SecretKey secretKey = new SecretKeySpec(encryptionKey, ENCRYPT_ALGORITHM);
+        Cipher cipher;
+        try {
+            cipher = Cipher.getInstance(CIPHER_ALGORITHM);
+        } catch (NoSuchAlgorithmException | NoSuchPaddingException e) {
+            Log.e(TAG, "Failed to encrypt with secret key.", e);
+            return null;
+        }
+        byte[] esalt = Cryptor.computeHkdf(salt, ESALT_IV, AES_CTR_IV_SIZE);
+        if (esalt == null) {
+            Log.e(TAG, "Failed to generate salt.");
+            return null;
+        }
+        try {
+            cipher.init(Cipher.ENCRYPT_MODE, secretKey, new IvParameterSpec(esalt));
+        } catch (InvalidKeyException | InvalidAlgorithmParameterException e) {
+            Log.e(TAG, "Failed to initialize cipher.", e);
+            return null;
+        }
+        try {
+            return cipher.doFinal(data);
+        } catch (IllegalBlockSizeException | BadPaddingException e) {
+            Log.e(TAG, "Failed to encrypt with secret key.", e);
+            return null;
+        }
+    }
+
+    @Nullable
+    @Override
+    public byte[] decrypt(byte[] encryptedData, byte[] salt, byte[] authenticityKey) {
+        if (authenticityKey.length != AUTHENTICITY_KEY_BYTE_SIZE) {
+            Log.w(TAG, "Illegal authenticity key size");
+            return null;
+        }
+
+        // Generates a 32 bytes encryption key from authenticity_key
+        byte[] encryptionKey = Cryptor.computeHkdf(authenticityKey, EK_IV, ENCRYPTION_KEY_SIZE);
+        if (encryptionKey == null) {
+            Log.e(TAG, "Failed to generate encryption key.");
+            return null;
+        }
+
+        // Decrypts the data using the encryption key
+        SecretKey secretKey = new SecretKeySpec(encryptionKey, ENCRYPT_ALGORITHM);
+        Cipher cipher;
+        try {
+            cipher = Cipher.getInstance(CIPHER_ALGORITHM);
+        } catch (NoSuchAlgorithmException | NoSuchPaddingException e) {
+            Log.e(TAG, "Failed to get cipher instance.", e);
+            return null;
+        }
+        byte[] esalt = Cryptor.computeHkdf(salt, ESALT_IV, AES_CTR_IV_SIZE);
+        if (esalt == null) {
+            return null;
+        }
+        try {
+            cipher.init(Cipher.DECRYPT_MODE, secretKey, new IvParameterSpec(esalt));
+        } catch (InvalidKeyException | InvalidAlgorithmParameterException e) {
+            Log.e(TAG, "Failed to initialize cipher.", e);
+            return null;
+        }
+
+        try {
+            return cipher.doFinal(encryptedData);
+        } catch (IllegalBlockSizeException | BadPaddingException e) {
+            Log.e(TAG, "Failed to decrypt bytes with secret key.", e);
+            return null;
+        }
+    }
+
+    /**
+     * Generates a digital signature for the data.
+     *
+     * @return signature {@code null} if failed to sign
+     */
+    @Nullable
+    @Override
+    public byte[] sign(byte[] data, byte[] salt) {
+        if (data == null) {
+            Log.e(TAG, "Not generate HMAC tag because of invalid data input.");
+            return null;
+        }
+
+        // Generates a 8 bytes HMAC tag
+        return Cryptor.computeHkdf(data, salt, HMAC_TAG_SIZE);
+    }
+
+    /**
+     * Generates a digital signature for the data.
+     * Uses KTAG_IV as salt value.
+     */
+    @Nullable
+    public byte[] sign(byte[] data) {
+        // Generates a 8 bytes HMAC tag
+        return sign(data, KTAG_IV);
+    }
+
+    @Override
+    public boolean verify(byte[] data, byte[] key, byte[] signature) {
+        return Arrays.equals(sign(data, key), signature);
+    }
+
+    /**
+     * Verifies the signature generated by data and key, with the original signed data. Uses
+     * KTAG_IV as salt value.
+     */
+    public boolean verify(byte[] data, byte[] signature) {
+        return verify(data, KTAG_IV, signature);
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/util/encryption/CryptorImpV1.java b/nearby/service/java/com/android/server/nearby/util/encryption/CryptorImpV1.java
new file mode 100644
index 0000000..15073fb
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/util/encryption/CryptorImpV1.java
@@ -0,0 +1,212 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.util.encryption;
+
+import static com.android.server.nearby.NearbyService.TAG;
+
+import android.security.keystore.KeyProperties;
+import android.util.Log;
+
+import androidx.annotation.Nullable;
+
+import com.android.internal.annotations.VisibleForTesting;
+
+import java.security.InvalidAlgorithmParameterException;
+import java.security.InvalidKeyException;
+import java.security.NoSuchAlgorithmException;
+import java.util.Arrays;
+
+import javax.crypto.BadPaddingException;
+import javax.crypto.Cipher;
+import javax.crypto.IllegalBlockSizeException;
+import javax.crypto.NoSuchPaddingException;
+import javax.crypto.SecretKey;
+import javax.crypto.spec.IvParameterSpec;
+import javax.crypto.spec.SecretKeySpec;
+
+/**
+ * {@link android.nearby.BroadcastRequest#PRESENCE_VERSION_V1} for encryption and decryption.
+ */
+public class CryptorImpV1 extends Cryptor {
+
+    /**
+     * In the form of "algorithm/mode/padding". Must be the same across broadcast and scan devices.
+     */
+    private static final String CIPHER_ALGORITHM = "AES/CTR/NoPadding";
+
+    @VisibleForTesting
+    static final String ENCRYPT_ALGORITHM = KeyProperties.KEY_ALGORITHM_AES;
+
+    /** Length of encryption key required by AES/GCM encryption. */
+    private static final int ENCRYPTION_KEY_SIZE = 32;
+
+    /** Length of salt required by AES/GCM encryption. */
+    private static final int AES_CTR_IV_SIZE = 16;
+
+    /** Length HMAC tag */
+    public static final int HMAC_TAG_SIZE = 16;
+
+    // 3 16 byte arrays known by both the encryptor and decryptor.
+    private static final byte[] AK_IV =
+            new byte[] {12, -59, 19, 23, 96, 57, -59, 19, 117, -31, -116, -61, 86, -25, -33, -78};
+    private static final byte[] ASALT_IV =
+            new byte[] {111, 48, -83, -79, -10, -102, -16, 73, 43, 55, 102, -127, 58, -19, -113, 4};
+    private static final byte[] HK_IV =
+            new byte[] {12, -59, 19, 23, 96, 57, -59, 19, 117, -31, -116, -61, 86, -25, -33, -78};
+
+    // Lazily instantiated when {@link #getInstance()} is called.
+    @Nullable private static CryptorImpV1 sCryptor;
+
+    /** Returns an instance of CryptorImpV1. */
+    public static CryptorImpV1 getInstance() {
+        if (sCryptor == null) {
+            sCryptor = new CryptorImpV1();
+        }
+        return sCryptor;
+    }
+
+    private CryptorImpV1() {
+    }
+
+    @Nullable
+    @Override
+    public byte[] encrypt(byte[] data, byte[] salt, byte[] authenticityKey) {
+        if (authenticityKey.length != AUTHENTICITY_KEY_BYTE_SIZE) {
+            Log.w(TAG, "Illegal authenticity key size");
+            return null;
+        }
+
+        // Generates a 32 bytes encryption key from authenticity_key
+        byte[] encryptionKey = Cryptor.computeHkdf(authenticityKey, AK_IV, ENCRYPTION_KEY_SIZE);
+        if (encryptionKey == null) {
+            Log.e(TAG, "Failed to generate encryption key.");
+            return null;
+        }
+
+        // Encrypts the data using the encryption key
+        SecretKey secretKey = new SecretKeySpec(encryptionKey, ENCRYPT_ALGORITHM);
+        Cipher cipher;
+        try {
+            cipher = Cipher.getInstance(CIPHER_ALGORITHM);
+        } catch (NoSuchAlgorithmException | NoSuchPaddingException e) {
+            Log.e(TAG, "Failed to encrypt with secret key.", e);
+            return null;
+        }
+        byte[] asalt = Cryptor.computeHkdf(salt, ASALT_IV, AES_CTR_IV_SIZE);
+        if (asalt == null) {
+            Log.e(TAG, "Failed to generate salt.");
+            return null;
+        }
+        try {
+            cipher.init(Cipher.ENCRYPT_MODE, secretKey, new IvParameterSpec(asalt));
+        } catch (InvalidKeyException | InvalidAlgorithmParameterException e) {
+            Log.e(TAG, "Failed to initialize cipher.", e);
+            return null;
+        }
+        try {
+            return cipher.doFinal(data);
+        } catch (IllegalBlockSizeException | BadPaddingException e) {
+            Log.e(TAG, "Failed to encrypt with secret key.", e);
+            return null;
+        }
+    }
+
+    @Nullable
+    @Override
+    public byte[] decrypt(byte[] encryptedData, byte[] salt, byte[] authenticityKey) {
+        if (authenticityKey.length != AUTHENTICITY_KEY_BYTE_SIZE) {
+            Log.w(TAG, "Illegal authenticity key size");
+            return null;
+        }
+
+        // Generates a 32 bytes encryption key from authenticity_key
+        byte[] encryptionKey = Cryptor.computeHkdf(authenticityKey, AK_IV, ENCRYPTION_KEY_SIZE);
+        if (encryptionKey == null) {
+            Log.e(TAG, "Failed to generate encryption key.");
+            return null;
+        }
+
+        // Decrypts the data using the encryption key
+        SecretKey secretKey = new SecretKeySpec(encryptionKey, ENCRYPT_ALGORITHM);
+        Cipher cipher;
+        try {
+            cipher = Cipher.getInstance(CIPHER_ALGORITHM);
+        } catch (NoSuchAlgorithmException | NoSuchPaddingException e) {
+            Log.e(TAG, "Failed to get cipher instance.", e);
+            return null;
+        }
+        byte[] asalt = Cryptor.computeHkdf(salt, ASALT_IV, AES_CTR_IV_SIZE);
+        if (asalt == null) {
+            return null;
+        }
+        try {
+            cipher.init(Cipher.DECRYPT_MODE, secretKey, new IvParameterSpec(asalt));
+        } catch (InvalidKeyException | InvalidAlgorithmParameterException e) {
+            Log.e(TAG, "Failed to initialize cipher.", e);
+            return null;
+        }
+
+        try {
+            return cipher.doFinal(encryptedData);
+        } catch (IllegalBlockSizeException | BadPaddingException e) {
+            Log.e(TAG, "Failed to decrypt bytes with secret key.", e);
+            return null;
+        }
+    }
+
+    @Override
+    @Nullable
+    public byte[] sign(byte[] data, byte[] key) {
+        return generateHmacTag(data, key);
+    }
+
+    @Override
+    public int getSignatureLength() {
+        return HMAC_TAG_SIZE;
+    }
+
+    @Override
+    public boolean verify(byte[] data, byte[] key, byte[] signature) {
+        return Arrays.equals(sign(data, key), signature);
+    }
+
+    /** Generates a 16 bytes HMAC tag. This is used for decryptor to verify if the computed HMAC tag
+     * is equal to HMAC tag in advertisement to see data integrity. */
+    @Nullable
+    @VisibleForTesting
+    byte[] generateHmacTag(byte[] data, byte[] authenticityKey) {
+        if (data == null || authenticityKey == null) {
+            Log.e(TAG, "Not generate HMAC tag because of invalid data input.");
+            return null;
+        }
+
+        if (authenticityKey.length != AUTHENTICITY_KEY_BYTE_SIZE) {
+            Log.e(TAG, "Illegal authenticity key size");
+            return null;
+        }
+
+        // Generates a 32 bytes HMAC key from authenticity_key
+        byte[] hmacKey = Cryptor.computeHkdf(authenticityKey, HK_IV, AES_CTR_IV_SIZE);
+        if (hmacKey == null) {
+            Log.e(TAG, "Failed to generate HMAC key.");
+            return null;
+        }
+
+        // Generates a 16 bytes HMAC tag from authenticity_key
+        return Cryptor.computeHkdf(data, hmacKey, HMAC_TAG_SIZE);
+    }
+}
diff --git a/nearby/service/proto/src/presence/blefilter.proto b/nearby/service/proto/src/presence/blefilter.proto
index 9f75d34..6e1ba6d 100644
--- a/nearby/service/proto/src/presence/blefilter.proto
+++ b/nearby/service/proto/src/presence/blefilter.proto
@@ -47,6 +47,7 @@
   optional bytes metadata_encryption_key_tag = 2;
 }
 
+// Public credential returned in BleFilterResult.
 message PublicCredential {
   optional bytes secret_id = 1;
   optional bytes authenticity_key = 2;
@@ -55,6 +56,20 @@
   optional bytes encrypted_metadata_tag = 5;
 }
 
+message DataElement {
+  enum ElementType {
+    DE_NONE = 0;
+    DE_FAST_PAIR_ACCOUNT_KEY = 9;
+    DE_CONNECTION_STATUS = 10;
+    DE_BATTERY_STATUS = 11;
+  }
+
+  optional ElementType key = 1;
+  optional bytes value = 2;
+  optional uint32 value_length = 3;
+}
+
+// A single filter used to filter BLE events.
 message BleFilter {
   optional uint32 id = 1;  // Required, unique id of this filter.
   // Maximum delay to notify the client after an event occurs.
@@ -71,7 +86,9 @@
   // the period of latency defined above.
   optional float distance_m = 7;
   // Used to verify the list of trusted devices.
-  repeated PublicateCertificate certficate = 8;
+  repeated PublicateCertificate certificate = 8;
+  // Data Elements for extended properties.
+  repeated DataElement data_element = 9;
 }
 
 message BleFilters {
@@ -80,14 +97,33 @@
 
 // FilterResult is returned to host when a BLE event matches a Filter.
 message BleFilterResult {
+  enum ResultType {
+    RESULT_NONE = 0;
+    RESULT_PRESENCE = 1;
+    RESULT_FAST_PAIR = 2;
+  }
+
   optional uint32 id = 1;  // id of the matched Filter.
-  optional uint32 tx_power = 2;
-  optional uint32 rssi = 3;
+  optional int32 tx_power = 2;
+  optional int32 rssi = 3;
   optional uint32 intent = 4;
   optional bytes bluetooth_address = 5;
   optional PublicCredential public_credential = 6;
+  repeated DataElement data_element = 7;
+  optional bytes ble_service_data = 8;
+  optional ResultType result_type = 9;
 }
 
 message BleFilterResults {
   repeated BleFilterResult result = 1;
 }
+
+message BleConfig {
+  // True to start BLE scan. Otherwise, stop BLE scan.
+  optional bool start_scan = 1;
+  // True when screen is turned on. Otherwise, set to false when screen is
+  // turned off.
+  optional bool screen_on = 2;
+  // Fast Pair cache expires after this time period.
+  optional uint64 fast_pair_cache_expire_time_sec = 3;
+}
diff --git a/nearby/tests/cts/fastpair/src/android/nearby/cts/CredentialElementTest.java b/nearby/tests/cts/fastpair/src/android/nearby/cts/CredentialElementTest.java
index aacb6d8..a2da967 100644
--- a/nearby/tests/cts/fastpair/src/android/nearby/cts/CredentialElementTest.java
+++ b/nearby/tests/cts/fastpair/src/android/nearby/cts/CredentialElementTest.java
@@ -42,7 +42,6 @@
     @SdkSuppress(minSdkVersion = 32, codeName = "T")
     public void testBuilder() {
         CredentialElement element = new CredentialElement(KEY, VALUE);
-
         assertThat(element.getKey()).isEqualTo(KEY);
         assertThat(Arrays.equals(element.getValue(), VALUE)).isTrue();
     }
@@ -58,9 +57,31 @@
         CredentialElement elementFromParcel = element.CREATOR.createFromParcel(
                 parcel);
         parcel.recycle();
-
         assertThat(elementFromParcel.getKey()).isEqualTo(KEY);
         assertThat(Arrays.equals(elementFromParcel.getValue(), VALUE)).isTrue();
     }
 
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void describeContents() {
+        CredentialElement element = new CredentialElement(KEY, VALUE);
+        assertThat(element.describeContents()).isEqualTo(0);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testEqual() {
+        CredentialElement element1 = new CredentialElement(KEY, VALUE);
+        CredentialElement element2 = new CredentialElement(KEY, VALUE);
+        assertThat(element1.equals(element2)).isTrue();
+        assertThat(element1.hashCode()).isEqualTo(element2.hashCode());
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testCreatorNewArray() {
+        CredentialElement [] elements =
+                CredentialElement.CREATOR.newArray(2);
+        assertThat(elements.length).isEqualTo(2);
+    }
 }
diff --git a/nearby/tests/cts/fastpair/src/android/nearby/cts/DataElementTest.java b/nearby/tests/cts/fastpair/src/android/nearby/cts/DataElementTest.java
index 3654d0d..84814ae 100644
--- a/nearby/tests/cts/fastpair/src/android/nearby/cts/DataElementTest.java
+++ b/nearby/tests/cts/fastpair/src/android/nearby/cts/DataElementTest.java
@@ -16,6 +16,13 @@
 
 package android.nearby.cts;
 
+import static android.nearby.DataElement.DataType.PRIVATE_IDENTITY;
+import static android.nearby.DataElement.DataType.PROVISIONED_IDENTITY;
+import static android.nearby.DataElement.DataType.PUBLIC_IDENTITY;
+import static android.nearby.DataElement.DataType.SALT;
+import static android.nearby.DataElement.DataType.TRUSTED_IDENTITY;
+import static android.nearby.DataElement.DataType.TX_POWER;
+
 import static com.google.common.truth.Truth.assertThat;
 
 import android.nearby.DataElement;
@@ -31,7 +38,6 @@
 
 import java.util.Arrays;
 
-
 @RunWith(AndroidJUnit4.class)
 @RequiresApi(Build.VERSION_CODES.TIRAMISU)
 public class DataElementTest {
@@ -63,4 +69,59 @@
         assertThat(elementFromParcel.getKey()).isEqualTo(KEY);
         assertThat(Arrays.equals(elementFromParcel.getValue(), VALUE)).isTrue();
     }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void describeContents() {
+        DataElement dataElement = new DataElement(KEY, VALUE);
+        assertThat(dataElement.describeContents()).isEqualTo(0);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testCreatorNewArray() {
+        DataElement[] elements =
+                DataElement.CREATOR.newArray(2);
+        assertThat(elements.length).isEqualTo(2);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testEquals() {
+        DataElement dataElement = new DataElement(KEY, VALUE);
+        DataElement dataElement2 = new DataElement(KEY, VALUE);
+
+        assertThat(dataElement.equals(dataElement2)).isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testIsIdentity() {
+        DataElement privateIdentity = new DataElement(PRIVATE_IDENTITY, new byte[]{1, 2, 3});
+        DataElement trustedIdentity = new DataElement(TRUSTED_IDENTITY, new byte[]{1, 2, 3});
+        DataElement publicIdentity = new DataElement(PUBLIC_IDENTITY, new byte[]{1, 2, 3});
+        DataElement provisionedIdentity =
+                new DataElement(PROVISIONED_IDENTITY, new byte[]{1, 2, 3});
+
+        DataElement salt = new DataElement(SALT, new byte[]{1, 2, 3});
+        DataElement txPower = new DataElement(TX_POWER, new byte[]{1, 2, 3});
+
+        assertThat(privateIdentity.isIdentityDataType()).isTrue();
+        assertThat(trustedIdentity.isIdentityDataType()).isTrue();
+        assertThat(publicIdentity.isIdentityDataType()).isTrue();
+        assertThat(provisionedIdentity.isIdentityDataType()).isTrue();
+        assertThat(salt.isIdentityDataType()).isFalse();
+        assertThat(txPower.isIdentityDataType()).isFalse();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_notEquals() {
+        DataElement dataElement = new DataElement(KEY, VALUE);
+        DataElement dataElement2 = new DataElement(KEY, new byte[]{1, 2, 1, 1});
+        DataElement dataElement3 = new DataElement(6, VALUE);
+
+        assertThat(dataElement.equals(dataElement2)).isFalse();
+        assertThat(dataElement.equals(dataElement3)).isFalse();
+    }
 }
diff --git a/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyDeviceParcelableTest.java b/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyDeviceParcelableTest.java
index 654b852..2907e56 100644
--- a/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyDeviceParcelableTest.java
+++ b/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyDeviceParcelableTest.java
@@ -22,6 +22,7 @@
 
 import android.nearby.NearbyDevice;
 import android.nearby.NearbyDeviceParcelable;
+import android.nearby.PublicCredential;
 import android.os.Build;
 import android.os.Parcel;
 
@@ -41,8 +42,11 @@
 
     private static final String BLUETOOTH_ADDRESS = "00:11:22:33:FF:EE";
     private static final byte[] SCAN_DATA = new byte[] {1, 2, 3, 4};
+    private static final byte[] SALT = new byte[] {1, 2, 3, 4};
     private static final String FAST_PAIR_MODEL_ID = "1234";
     private static final int RSSI = -60;
+    private static final int TX_POWER = -10;
+    private static final int ACTION = 1;
 
     private NearbyDeviceParcelable.Builder mBuilder;
 
@@ -61,20 +65,36 @@
 
     @Test
     @SdkSuppress(minSdkVersion = 33, codeName = "T")
-    public void test_defaultNullFields() {
+    public void testNullFields() {
+        PublicCredential publicCredential =
+                new PublicCredential.Builder(
+                        new byte[] {1},
+                        new byte[] {2},
+                        new byte[] {3},
+                        new byte[] {4},
+                        new byte[] {5})
+                        .build();
         NearbyDeviceParcelable nearbyDeviceParcelable =
                 new NearbyDeviceParcelable.Builder()
                         .setMedium(NearbyDevice.Medium.BLE)
+                        .setPublicCredential(publicCredential)
+                        .setAction(ACTION)
                         .setRssi(RSSI)
+                        .setScanType(SCAN_TYPE_NEARBY_PRESENCE)
+                        .setTxPower(TX_POWER)
+                        .setSalt(SALT)
                         .build();
 
         assertThat(nearbyDeviceParcelable.getName()).isNull();
         assertThat(nearbyDeviceParcelable.getFastPairModelId()).isNull();
         assertThat(nearbyDeviceParcelable.getBluetoothAddress()).isNull();
         assertThat(nearbyDeviceParcelable.getData()).isNull();
-
         assertThat(nearbyDeviceParcelable.getMedium()).isEqualTo(NearbyDevice.Medium.BLE);
         assertThat(nearbyDeviceParcelable.getRssi()).isEqualTo(RSSI);
+        assertThat(nearbyDeviceParcelable.getAction()).isEqualTo(ACTION);
+        assertThat(nearbyDeviceParcelable.getPublicCredential()).isEqualTo(publicCredential);
+        assertThat(nearbyDeviceParcelable.getSalt()).isEqualTo(SALT);
+        assertThat(nearbyDeviceParcelable.getTxPower()).isEqualTo(TX_POWER);
     }
 
     @Test
@@ -114,7 +134,6 @@
     @SdkSuppress(minSdkVersion = 33, codeName = "T")
     public void testWriteParcel_nullBluetoothAddress() {
         NearbyDeviceParcelable nearbyDeviceParcelable = mBuilder.setBluetoothAddress(null).build();
-
         Parcel parcel = Parcel.obtain();
         nearbyDeviceParcelable.writeToParcel(parcel, 0);
         parcel.setDataPosition(0);
@@ -124,4 +143,36 @@
 
         assertThat(actualNearbyDevice.getBluetoothAddress()).isNull();
     }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 33, codeName = "T")
+    public void describeContents() {
+        NearbyDeviceParcelable nearbyDeviceParcelable = mBuilder.setBluetoothAddress(null).build();
+        assertThat(nearbyDeviceParcelable.describeContents()).isEqualTo(0);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 33, codeName = "T")
+    public void testEqual() {
+        PublicCredential publicCredential =
+                new PublicCredential.Builder(
+                        new byte[] {1},
+                        new byte[] {2},
+                        new byte[] {3},
+                        new byte[] {4},
+                        new byte[] {5})
+                        .build();
+        NearbyDeviceParcelable nearbyDeviceParcelable1 =
+                mBuilder.setPublicCredential(publicCredential).build();
+        NearbyDeviceParcelable nearbyDeviceParcelable2 =
+                mBuilder.setPublicCredential(publicCredential).build();
+        assertThat(nearbyDeviceParcelable1.equals(nearbyDeviceParcelable2)).isTrue();
+    }
+
+    @Test
+    public void testCreatorNewArray() {
+        NearbyDeviceParcelable[] nearbyDeviceParcelables =
+                NearbyDeviceParcelable.CREATOR.newArray(2);
+        assertThat(nearbyDeviceParcelables.length).isEqualTo(2);
+    }
 }
diff --git a/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyDeviceTest.java b/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyDeviceTest.java
index f37800a..8ca5a94 100644
--- a/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyDeviceTest.java
+++ b/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyDeviceTest.java
@@ -16,6 +16,8 @@
 
 package android.nearby.cts;
 
+import static android.nearby.NearbyDevice.Medium.BLE;
+
 import android.annotation.TargetApi;
 import android.nearby.FastPairDevice;
 import android.nearby.NearbyDevice;
@@ -34,13 +36,18 @@
 @RequiresApi(Build.VERSION_CODES.TIRAMISU)
 @TargetApi(Build.VERSION_CODES.TIRAMISU)
 public class NearbyDeviceTest {
+    private static final String NAME = "NearbyDevice";
+    private static final String MODEL_ID = "112233";
+    private static final int TX_POWER = -10;
+    private static final int RSSI = -60;
+    private static final String BLUETOOTH_ADDRESS = "00:11:22:33:FF:EE";
+    private static final byte[] SCAN_DATA = new byte[] {1, 2, 3, 4};
 
     @Test
     @SdkSuppress(minSdkVersion = 32, codeName = "T")
     public void test_isValidMedium() {
         assertThat(NearbyDevice.isValidMedium(1)).isTrue();
         assertThat(NearbyDevice.isValidMedium(2)).isTrue();
-
         assertThat(NearbyDevice.isValidMedium(0)).isFalse();
         assertThat(NearbyDevice.isValidMedium(3)).isFalse();
     }
@@ -49,11 +56,55 @@
     @SdkSuppress(minSdkVersion = 32, codeName = "T")
     public void test_getMedium_fromChild() {
         FastPairDevice fastPairDevice = new FastPairDevice.Builder()
-                .addMedium(NearbyDevice.Medium.BLE)
-                .setRssi(-60)
+                .addMedium(BLE)
+                .setRssi(RSSI)
                 .build();
 
         assertThat(fastPairDevice.getMediums()).contains(1);
-        assertThat(fastPairDevice.getRssi()).isEqualTo(-60);
+        assertThat(fastPairDevice.getRssi()).isEqualTo(RSSI);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testEqual() {
+        FastPairDevice fastPairDevice1 = new FastPairDevice.Builder()
+                .setModelId(MODEL_ID)
+                .setTxPower(TX_POWER)
+                .setBluetoothAddress(BLUETOOTH_ADDRESS)
+                .setData(SCAN_DATA)
+                .setRssi(RSSI)
+                .addMedium(BLE)
+                .setName(NAME)
+                .build();
+        FastPairDevice fastPairDevice2 = new FastPairDevice.Builder()
+                .setModelId(MODEL_ID)
+                .setTxPower(TX_POWER)
+                .setBluetoothAddress(BLUETOOTH_ADDRESS)
+                .setData(SCAN_DATA)
+                .setRssi(RSSI)
+                .addMedium(BLE)
+                .setName(NAME)
+                .build();
+
+        assertThat(fastPairDevice1.equals(fastPairDevice1)).isTrue();
+        assertThat(fastPairDevice1.equals(fastPairDevice2)).isTrue();
+        assertThat(fastPairDevice1.equals(null)).isFalse();
+        assertThat(fastPairDevice1.hashCode()).isEqualTo(fastPairDevice2.hashCode());
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testToString() {
+        FastPairDevice fastPairDevice1 = new FastPairDevice.Builder()
+                .addMedium(BLE)
+                .setRssi(RSSI)
+                .setModelId(MODEL_ID)
+                .setTxPower(TX_POWER)
+                .setBluetoothAddress(BLUETOOTH_ADDRESS)
+                .build();
+
+        assertThat(fastPairDevice1.toString())
+                .isEqualTo("FastPairDevice [medium={BLE} rssi=-60 "
+                        + "txPower=-10 modelId=112233 bluetoothAddress=00:11:22:33:FF:EE]");
     }
 }
diff --git a/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyManagerTest.java b/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyManagerTest.java
index 7696a61..462d05a 100644
--- a/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyManagerTest.java
+++ b/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyManagerTest.java
@@ -158,6 +158,15 @@
         mNearbyManager.stopBroadcast(callback);
     }
 
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void setFastPairScanEnabled() {
+        mNearbyManager.setFastPairScanEnabled(mContext, true);
+        assertThat(mNearbyManager.getFastPairScanEnabled(mContext)).isTrue();
+        mNearbyManager.setFastPairScanEnabled(mContext, false);
+        assertThat(mNearbyManager.getFastPairScanEnabled(mContext)).isFalse();
+    }
+
     private void enableBluetooth() {
         BluetoothManager manager = mContext.getSystemService(BluetoothManager.class);
         BluetoothAdapter bluetoothAdapter = manager.getAdapter();
diff --git a/nearby/tests/cts/fastpair/src/android/nearby/cts/PresenceBroadcastRequestTest.java b/nearby/tests/cts/fastpair/src/android/nearby/cts/PresenceBroadcastRequestTest.java
index eaa5ca1..71be889 100644
--- a/nearby/tests/cts/fastpair/src/android/nearby/cts/PresenceBroadcastRequestTest.java
+++ b/nearby/tests/cts/fastpair/src/android/nearby/cts/PresenceBroadcastRequestTest.java
@@ -114,4 +114,18 @@
         assertThat(parcelRequest.getType()).isEqualTo(BROADCAST_TYPE_NEARBY_PRESENCE);
 
     }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void describeContents() {
+        PresenceBroadcastRequest broadcastRequest = mBuilder.build();
+        assertThat(broadcastRequest.describeContents()).isEqualTo(0);
+    }
+
+    @Test
+    public void testCreatorNewArray() {
+        PresenceBroadcastRequest[] presenceBroadcastRequests =
+                PresenceBroadcastRequest.CREATOR.newArray(2);
+        assertThat(presenceBroadcastRequests.length).isEqualTo(2);
+    }
 }
diff --git a/nearby/tests/cts/fastpair/src/android/nearby/cts/PresenceDeviceTest.java b/nearby/tests/cts/fastpair/src/android/nearby/cts/PresenceDeviceTest.java
index 94f8fe7..ea1de6b 100644
--- a/nearby/tests/cts/fastpair/src/android/nearby/cts/PresenceDeviceTest.java
+++ b/nearby/tests/cts/fastpair/src/android/nearby/cts/PresenceDeviceTest.java
@@ -104,4 +104,24 @@
         assertThat(parcelDevice.getMediums()).containsExactly(MEDIUM);
         assertThat(parcelDevice.getName()).isEqualTo(DEVICE_NAME);
     }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void describeContents() {
+        PresenceDevice device =
+                new PresenceDevice.Builder(DEVICE_ID, SALT, SECRET_ID, ENCRYPTED_IDENTITY)
+                        .addExtendedProperty(new DataElement(KEY, VALUE))
+                        .setRssi(RSSI)
+                        .addMedium(MEDIUM)
+                        .setName(DEVICE_NAME)
+                        .build();
+        assertThat(device.describeContents()).isEqualTo(0);
+    }
+
+    @Test
+    public void testCreatorNewArray() {
+        PresenceDevice[] devices =
+                PresenceDevice.CREATOR.newArray(2);
+        assertThat(devices.length).isEqualTo(2);
+    }
 }
diff --git a/nearby/tests/cts/fastpair/src/android/nearby/cts/PresenceScanFilterTest.java b/nearby/tests/cts/fastpair/src/android/nearby/cts/PresenceScanFilterTest.java
index cecdfd2..77e7dc5 100644
--- a/nearby/tests/cts/fastpair/src/android/nearby/cts/PresenceScanFilterTest.java
+++ b/nearby/tests/cts/fastpair/src/android/nearby/cts/PresenceScanFilterTest.java
@@ -90,5 +90,21 @@
         assertThat(parcelFilter.getType()).isEqualTo(ScanRequest.SCAN_TYPE_NEARBY_PRESENCE);
         assertThat(parcelFilter.getMaxPathLoss()).isEqualTo(RSSI);
         assertThat(parcelFilter.getPresenceActions()).containsExactly(ACTION);
+        assertThat(parcelFilter.getExtendedProperties().get(0).getKey()).isEqualTo(KEY);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void describeContents() {
+        PresenceScanFilter filter = mBuilder.build();
+        assertThat(filter.describeContents()).isEqualTo(0);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testCreatorNewArray() {
+        PresenceScanFilter[] filters =
+                PresenceScanFilter.CREATOR.newArray(2);
+        assertThat(filters.length).isEqualTo(2);
     }
 }
diff --git a/nearby/tests/cts/fastpair/src/android/nearby/cts/PrivateCredentialTest.java b/nearby/tests/cts/fastpair/src/android/nearby/cts/PrivateCredentialTest.java
index f05f65f..fa8c954 100644
--- a/nearby/tests/cts/fastpair/src/android/nearby/cts/PrivateCredentialTest.java
+++ b/nearby/tests/cts/fastpair/src/android/nearby/cts/PrivateCredentialTest.java
@@ -99,4 +99,19 @@
         assertThat(credentialElement.getKey()).isEqualTo(KEY);
         assertThat(Arrays.equals(credentialElement.getValue(), VALUE)).isTrue();
     }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 33, codeName = "T")
+    public void describeContents() {
+        PrivateCredential credential = mBuilder.build();
+        assertThat(credential.describeContents()).isEqualTo(0);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 33, codeName = "T")
+    public void testCreatorNewArray() {
+        PrivateCredential[]  credentials =
+                PrivateCredential.CREATOR.newArray(2);
+        assertThat(credentials.length).isEqualTo(2);
+    }
 }
diff --git a/nearby/tests/cts/fastpair/src/android/nearby/cts/PublicCredentialTest.java b/nearby/tests/cts/fastpair/src/android/nearby/cts/PublicCredentialTest.java
index 11bbacc..774e897 100644
--- a/nearby/tests/cts/fastpair/src/android/nearby/cts/PublicCredentialTest.java
+++ b/nearby/tests/cts/fastpair/src/android/nearby/cts/PublicCredentialTest.java
@@ -135,6 +135,7 @@
                         .setIdentityType(IDENTITY_TYPE_PRIVATE)
                         .build();
         assertThat(credentialOne.equals((Object) credentialTwo)).isTrue();
+        assertThat(credentialOne.equals(null)).isFalse();
     }
 
     @Test
@@ -161,4 +162,19 @@
                         .build();
         assertThat(credentialOne.equals((Object) credentialTwo)).isFalse();
     }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void describeContents() {
+        PublicCredential credential = mBuilder.build();
+        assertThat(credential.describeContents()).isEqualTo(0);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testCreatorNewArray() {
+        PublicCredential[] credentials  =
+        PublicCredential.CREATOR.newArray(2);
+        assertThat(credentials.length).isEqualTo(2);
+    }
 }
diff --git a/nearby/tests/cts/fastpair/src/android/nearby/cts/ScanRequestTest.java b/nearby/tests/cts/fastpair/src/android/nearby/cts/ScanRequestTest.java
index 21f3d28..de4b1c3 100644
--- a/nearby/tests/cts/fastpair/src/android/nearby/cts/ScanRequestTest.java
+++ b/nearby/tests/cts/fastpair/src/android/nearby/cts/ScanRequestTest.java
@@ -171,6 +171,23 @@
         assertThat(request.getScanFilters().get(0).getMaxPathLoss()).isEqualTo(RSSI);
     }
 
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void describeContents() {
+        ScanRequest request = new ScanRequest.Builder()
+                .setScanType(SCAN_TYPE_FAST_PAIR)
+                .build();
+        assertThat(request.describeContents()).isEqualTo(0);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testCreatorNewArray() {
+        ScanRequest[] requests =
+                ScanRequest.CREATOR.newArray(2);
+        assertThat(requests.length).isEqualTo(2);
+    }
+
     private static PresenceScanFilter getPresenceScanFilter() {
         final byte[] secretId = new byte[]{1, 2, 3, 4};
         final byte[] authenticityKey = new byte[]{0, 1, 1, 1};
diff --git a/nearby/tests/unit/AndroidManifest.xml b/nearby/tests/unit/AndroidManifest.xml
index 9f58baf..7dcb263 100644
--- a/nearby/tests/unit/AndroidManifest.xml
+++ b/nearby/tests/unit/AndroidManifest.xml
@@ -23,6 +23,7 @@
     <uses-permission android:name="android.permission.BLUETOOTH" />
     <uses-permission android:name="android.permission.BLUETOOTH_SCAN" />
     <uses-permission android:name="android.permission.BLUETOOTH_ADVERTISE" />
+    <uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
 
     <application android:debuggable="true">
         <uses-library android:name="android.test.runner" />
diff --git a/nearby/tests/unit/src/android/nearby/FastPairAntispoofKeyDeviceMetadataTest.java b/nearby/tests/unit/src/android/nearby/FastPairAntispoofKeyDeviceMetadataTest.java
new file mode 100644
index 0000000..d095529
--- /dev/null
+++ b/nearby/tests/unit/src/android/nearby/FastPairAntispoofKeyDeviceMetadataTest.java
@@ -0,0 +1,177 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+public class FastPairAntispoofKeyDeviceMetadataTest {
+
+    private static final int BLE_TX_POWER  = 5;
+    private static final String CONNECT_SUCCESS_COMPANION_APP_INSTALLED =
+            "CONNECT_SUCCESS_COMPANION_APP_INSTALLED";
+    private static final String CONNECT_SUCCESS_COMPANION_APP_NOT_INSTALLED =
+            "CONNECT_SUCCESS_COMPANION_APP_NOT_INSTALLED";
+    private static final float DELTA = 0.001f;
+    private static final int DEVICE_TYPE = 7;
+    private static final String DOWNLOAD_COMPANION_APP_DESCRIPTION =
+            "DOWNLOAD_COMPANION_APP_DESCRIPTION";
+    private static final String FAIL_CONNECT_GOTO_SETTINGS_DESCRIPTION =
+            "FAIL_CONNECT_GOTO_SETTINGS_DESCRIPTION";
+    private static final byte[] IMAGE = new byte[] {7, 9};
+    private static final String IMAGE_URL = "IMAGE_URL";
+    private static final String INITIAL_NOTIFICATION_DESCRIPTION =
+            "INITIAL_NOTIFICATION_DESCRIPTION";
+    private static final String INITIAL_NOTIFICATION_DESCRIPTION_NO_ACCOUNT =
+            "INITIAL_NOTIFICATION_DESCRIPTION_NO_ACCOUNT";
+    private static final String INITIAL_PAIRING_DESCRIPTION = "INITIAL_PAIRING_DESCRIPTION";
+    private static final String INTENT_URI = "INTENT_URI";
+    private static final String OPEN_COMPANION_APP_DESCRIPTION = "OPEN_COMPANION_APP_DESCRIPTION";
+    private static final String RETRO_ACTIVE_PAIRING_DESCRIPTION =
+            "RETRO_ACTIVE_PAIRING_DESCRIPTION";
+    private static final String SUBSEQUENT_PAIRING_DESCRIPTION = "SUBSEQUENT_PAIRING_DESCRIPTION";
+    private static final float TRIGGER_DISTANCE = 111;
+    private static final String TRUE_WIRELESS_IMAGE_URL_CASE = "TRUE_WIRELESS_IMAGE_URL_CASE";
+    private static final String TRUE_WIRELESS_IMAGE_URL_LEFT_BUD =
+            "TRUE_WIRELESS_IMAGE_URL_LEFT_BUD";
+    private static final String TRUE_WIRELESS_IMAGE_URL_RIGHT_BUD =
+            "TRUE_WIRELESS_IMAGE_URL_RIGHT_BUD";
+    private static final String UNABLE_TO_CONNECT_DESCRIPTION = "UNABLE_TO_CONNECT_DESCRIPTION";
+    private static final String UNABLE_TO_CONNECT_TITLE = "UNABLE_TO_CONNECT_TITLE";
+    private static final String UPDATE_COMPANION_APP_DESCRIPTION =
+            "UPDATE_COMPANION_APP_DESCRIPTION";
+    private static final String WAIT_LAUNCH_COMPANION_APP_DESCRIPTION =
+            "WAIT_LAUNCH_COMPANION_APP_DESCRIPTION";
+    private static final byte[] ANTI_SPOOFING_KEY = new byte[] {4, 5, 6};
+    private static final String NAME = "NAME";
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testSetGetFastPairAntispoofKeyDeviceMetadataNotNull() {
+        FastPairDeviceMetadata fastPairDeviceMetadata = genFastPairDeviceMetadata();
+        FastPairAntispoofKeyDeviceMetadata fastPairAntispoofKeyDeviceMetadata =
+                genFastPairAntispoofKeyDeviceMetadata(ANTI_SPOOFING_KEY, fastPairDeviceMetadata);
+
+        assertThat(fastPairAntispoofKeyDeviceMetadata.getAntispoofPublicKey()).isEqualTo(
+                ANTI_SPOOFING_KEY);
+        ensureFastPairDeviceMetadataAsExpected(
+                fastPairAntispoofKeyDeviceMetadata.getFastPairDeviceMetadata());
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testSetGetFastPairAntispoofKeyDeviceMetadataNull() {
+        FastPairAntispoofKeyDeviceMetadata fastPairAntispoofKeyDeviceMetadata =
+                genFastPairAntispoofKeyDeviceMetadata(null, null);
+        assertThat(fastPairAntispoofKeyDeviceMetadata.getAntispoofPublicKey()).isEqualTo(
+                null);
+        assertThat(fastPairAntispoofKeyDeviceMetadata.getFastPairDeviceMetadata()).isEqualTo(
+                null);
+    }
+
+    /* Verifies DeviceMetadata. */
+    private static void ensureFastPairDeviceMetadataAsExpected(FastPairDeviceMetadata metadata) {
+        assertThat(metadata.getBleTxPower()).isEqualTo(BLE_TX_POWER);
+        assertThat(metadata.getConnectSuccessCompanionAppInstalled())
+                .isEqualTo(CONNECT_SUCCESS_COMPANION_APP_INSTALLED);
+        assertThat(metadata.getConnectSuccessCompanionAppNotInstalled())
+                .isEqualTo(CONNECT_SUCCESS_COMPANION_APP_NOT_INSTALLED);
+        assertThat(metadata.getDeviceType()).isEqualTo(DEVICE_TYPE);
+        assertThat(metadata.getDownloadCompanionAppDescription())
+                .isEqualTo(DOWNLOAD_COMPANION_APP_DESCRIPTION);
+        assertThat(metadata.getFailConnectGoToSettingsDescription())
+                .isEqualTo(FAIL_CONNECT_GOTO_SETTINGS_DESCRIPTION);
+        assertThat(metadata.getImage()).isEqualTo(IMAGE);
+        assertThat(metadata.getImageUrl()).isEqualTo(IMAGE_URL);
+        assertThat(metadata.getInitialNotificationDescription())
+                .isEqualTo(INITIAL_NOTIFICATION_DESCRIPTION);
+        assertThat(metadata.getInitialNotificationDescriptionNoAccount())
+                .isEqualTo(INITIAL_NOTIFICATION_DESCRIPTION_NO_ACCOUNT);
+        assertThat(metadata.getInitialPairingDescription()).isEqualTo(INITIAL_PAIRING_DESCRIPTION);
+        assertThat(metadata.getIntentUri()).isEqualTo(INTENT_URI);
+        assertThat(metadata.getName()).isEqualTo(NAME);
+        assertThat(metadata.getOpenCompanionAppDescription())
+                .isEqualTo(OPEN_COMPANION_APP_DESCRIPTION);
+        assertThat(metadata.getRetroactivePairingDescription())
+                .isEqualTo(RETRO_ACTIVE_PAIRING_DESCRIPTION);
+        assertThat(metadata.getSubsequentPairingDescription())
+                .isEqualTo(SUBSEQUENT_PAIRING_DESCRIPTION);
+        assertThat(metadata.getTriggerDistance()).isWithin(DELTA).of(TRIGGER_DISTANCE);
+        assertThat(metadata.getTrueWirelessImageUrlCase()).isEqualTo(TRUE_WIRELESS_IMAGE_URL_CASE);
+        assertThat(metadata.getTrueWirelessImageUrlLeftBud())
+                .isEqualTo(TRUE_WIRELESS_IMAGE_URL_LEFT_BUD);
+        assertThat(metadata.getTrueWirelessImageUrlRightBud())
+                .isEqualTo(TRUE_WIRELESS_IMAGE_URL_RIGHT_BUD);
+        assertThat(metadata.getUnableToConnectDescription())
+                .isEqualTo(UNABLE_TO_CONNECT_DESCRIPTION);
+        assertThat(metadata.getUnableToConnectTitle()).isEqualTo(UNABLE_TO_CONNECT_TITLE);
+        assertThat(metadata.getUpdateCompanionAppDescription())
+                .isEqualTo(UPDATE_COMPANION_APP_DESCRIPTION);
+        assertThat(metadata.getWaitLaunchCompanionAppDescription())
+                .isEqualTo(WAIT_LAUNCH_COMPANION_APP_DESCRIPTION);
+    }
+
+    /* Generates FastPairAntispoofKeyDeviceMetadata. */
+    private static FastPairAntispoofKeyDeviceMetadata genFastPairAntispoofKeyDeviceMetadata(
+            byte[] antispoofPublicKey, FastPairDeviceMetadata deviceMetadata) {
+        FastPairAntispoofKeyDeviceMetadata.Builder builder =
+                new FastPairAntispoofKeyDeviceMetadata.Builder();
+        builder.setAntispoofPublicKey(antispoofPublicKey);
+        builder.setFastPairDeviceMetadata(deviceMetadata);
+
+        return builder.build();
+    }
+
+    /* Generates FastPairDeviceMetadata. */
+    private static FastPairDeviceMetadata genFastPairDeviceMetadata() {
+        FastPairDeviceMetadata.Builder builder = new FastPairDeviceMetadata.Builder();
+        builder.setBleTxPower(BLE_TX_POWER);
+        builder.setConnectSuccessCompanionAppInstalled(CONNECT_SUCCESS_COMPANION_APP_INSTALLED);
+        builder.setConnectSuccessCompanionAppNotInstalled(
+                CONNECT_SUCCESS_COMPANION_APP_NOT_INSTALLED);
+        builder.setDeviceType(DEVICE_TYPE);
+        builder.setDownloadCompanionAppDescription(DOWNLOAD_COMPANION_APP_DESCRIPTION);
+        builder.setFailConnectGoToSettingsDescription(FAIL_CONNECT_GOTO_SETTINGS_DESCRIPTION);
+        builder.setImage(IMAGE);
+        builder.setImageUrl(IMAGE_URL);
+        builder.setInitialNotificationDescription(INITIAL_NOTIFICATION_DESCRIPTION);
+        builder.setInitialNotificationDescriptionNoAccount(
+                INITIAL_NOTIFICATION_DESCRIPTION_NO_ACCOUNT);
+        builder.setInitialPairingDescription(INITIAL_PAIRING_DESCRIPTION);
+        builder.setIntentUri(INTENT_URI);
+        builder.setName(NAME);
+        builder.setOpenCompanionAppDescription(OPEN_COMPANION_APP_DESCRIPTION);
+        builder.setRetroactivePairingDescription(RETRO_ACTIVE_PAIRING_DESCRIPTION);
+        builder.setSubsequentPairingDescription(SUBSEQUENT_PAIRING_DESCRIPTION);
+        builder.setTriggerDistance(TRIGGER_DISTANCE);
+        builder.setTrueWirelessImageUrlCase(TRUE_WIRELESS_IMAGE_URL_CASE);
+        builder.setTrueWirelessImageUrlLeftBud(TRUE_WIRELESS_IMAGE_URL_LEFT_BUD);
+        builder.setTrueWirelessImageUrlRightBud(TRUE_WIRELESS_IMAGE_URL_RIGHT_BUD);
+        builder.setUnableToConnectDescription(UNABLE_TO_CONNECT_DESCRIPTION);
+        builder.setUnableToConnectTitle(UNABLE_TO_CONNECT_TITLE);
+        builder.setUpdateCompanionAppDescription(UPDATE_COMPANION_APP_DESCRIPTION);
+        builder.setWaitLaunchCompanionAppDescription(WAIT_LAUNCH_COMPANION_APP_DESCRIPTION);
+
+        return builder.build();
+    }
+}
diff --git a/nearby/tests/unit/src/android/nearby/FastPairDataProviderServiceTest.java b/nearby/tests/unit/src/android/nearby/FastPairDataProviderServiceTest.java
new file mode 100644
index 0000000..b3f2442
--- /dev/null
+++ b/nearby/tests/unit/src/android/nearby/FastPairDataProviderServiceTest.java
@@ -0,0 +1,966 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.verify;
+import static org.mockito.MockitoAnnotations.initMocks;
+
+import android.accounts.Account;
+import android.content.Intent;
+import android.nearby.aidl.ByteArrayParcel;
+import android.nearby.aidl.FastPairAccountDevicesMetadataRequestParcel;
+import android.nearby.aidl.FastPairAccountKeyDeviceMetadataParcel;
+import android.nearby.aidl.FastPairAntispoofKeyDeviceMetadataParcel;
+import android.nearby.aidl.FastPairAntispoofKeyDeviceMetadataRequestParcel;
+import android.nearby.aidl.FastPairDeviceMetadataParcel;
+import android.nearby.aidl.FastPairDiscoveryItemParcel;
+import android.nearby.aidl.FastPairEligibleAccountParcel;
+import android.nearby.aidl.FastPairEligibleAccountsRequestParcel;
+import android.nearby.aidl.FastPairManageAccountDeviceRequestParcel;
+import android.nearby.aidl.FastPairManageAccountRequestParcel;
+import android.nearby.aidl.IFastPairAccountDevicesMetadataCallback;
+import android.nearby.aidl.IFastPairAntispoofKeyDeviceMetadataCallback;
+import android.nearby.aidl.IFastPairDataProvider;
+import android.nearby.aidl.IFastPairEligibleAccountsCallback;
+import android.nearby.aidl.IFastPairManageAccountCallback;
+import android.nearby.aidl.IFastPairManageAccountDeviceCallback;
+
+import androidx.annotation.NonNull;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+
+import com.google.common.collect.ImmutableList;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Captor;
+import org.mockito.Mock;
+
+@RunWith(AndroidJUnit4.class)
+public class FastPairDataProviderServiceTest {
+
+    private static final String TAG = "FastPairDataProviderServiceTest";
+
+    private static final int BLE_TX_POWER  = 5;
+    private static final String CONNECT_SUCCESS_COMPANION_APP_INSTALLED =
+            "CONNECT_SUCCESS_COMPANION_APP_INSTALLED";
+    private static final String CONNECT_SUCCESS_COMPANION_APP_NOT_INSTALLED =
+            "CONNECT_SUCCESS_COMPANION_APP_NOT_INSTALLED";
+    private static final float DELTA = 0.001f;
+    private static final int DEVICE_TYPE = 7;
+    private static final String DOWNLOAD_COMPANION_APP_DESCRIPTION =
+            "DOWNLOAD_COMPANION_APP_DESCRIPTION";
+    private static final Account ELIGIBLE_ACCOUNT_1 = new Account("abc@google.com", "type1");
+    private static final boolean ELIGIBLE_ACCOUNT_1_OPT_IN = true;
+    private static final Account ELIGIBLE_ACCOUNT_2 = new Account("def@gmail.com", "type2");
+    private static final boolean ELIGIBLE_ACCOUNT_2_OPT_IN = false;
+    private static final Account MANAGE_ACCOUNT = new Account("ghi@gmail.com", "type3");
+    private static final Account ACCOUNTDEVICES_METADATA_ACCOUNT =
+            new Account("jk@gmail.com", "type4");
+    private static final int NUM_ACCOUNT_DEVICES = 2;
+
+    private static final int ERROR_CODE_BAD_REQUEST =
+            FastPairDataProviderService.ERROR_CODE_BAD_REQUEST;
+    private static final int MANAGE_ACCOUNT_REQUEST_TYPE =
+            FastPairDataProviderService.MANAGE_REQUEST_ADD;
+    private static final String ERROR_STRING = "ERROR_STRING";
+    private static final String FAIL_CONNECT_GOTO_SETTINGS_DESCRIPTION =
+            "FAIL_CONNECT_GOTO_SETTINGS_DESCRIPTION";
+    private static final byte[] IMAGE = new byte[] {7, 9};
+    private static final String IMAGE_URL = "IMAGE_URL";
+    private static final String INITIAL_NOTIFICATION_DESCRIPTION =
+            "INITIAL_NOTIFICATION_DESCRIPTION";
+    private static final String INITIAL_NOTIFICATION_DESCRIPTION_NO_ACCOUNT =
+            "INITIAL_NOTIFICATION_DESCRIPTION_NO_ACCOUNT";
+    private static final String INITIAL_PAIRING_DESCRIPTION = "INITIAL_PAIRING_DESCRIPTION";
+    private static final String INTENT_URI = "INTENT_URI";
+    private static final String OPEN_COMPANION_APP_DESCRIPTION = "OPEN_COMPANION_APP_DESCRIPTION";
+    private static final String RETRO_ACTIVE_PAIRING_DESCRIPTION =
+            "RETRO_ACTIVE_PAIRING_DESCRIPTION";
+    private static final String SUBSEQUENT_PAIRING_DESCRIPTION = "SUBSEQUENT_PAIRING_DESCRIPTION";
+    private static final float TRIGGER_DISTANCE = 111;
+    private static final String TRUE_WIRELESS_IMAGE_URL_CASE = "TRUE_WIRELESS_IMAGE_URL_CASE";
+    private static final String TRUE_WIRELESS_IMAGE_URL_LEFT_BUD =
+            "TRUE_WIRELESS_IMAGE_URL_LEFT_BUD";
+    private static final String TRUE_WIRELESS_IMAGE_URL_RIGHT_BUD =
+            "TRUE_WIRELESS_IMAGE_URL_RIGHT_BUD";
+    private static final String UNABLE_TO_CONNECT_DESCRIPTION = "UNABLE_TO_CONNECT_DESCRIPTION";
+    private static final String UNABLE_TO_CONNECT_TITLE = "UNABLE_TO_CONNECT_TITLE";
+    private static final String UPDATE_COMPANION_APP_DESCRIPTION =
+            "UPDATE_COMPANION_APP_DESCRIPTION";
+    private static final String WAIT_LAUNCH_COMPANION_APP_DESCRIPTION =
+            "WAIT_LAUNCH_COMPANION_APP_DESCRIPTION";
+    private static final byte[] ACCOUNT_KEY = new byte[] {3};
+    private static final byte[] ACCOUNT_KEY_2 = new byte[] {9, 3};
+    private static final byte[] SHA256_ACCOUNT_KEY_PUBLIC_ADDRESS = new byte[] {2, 8};
+    private static final byte[] REQUEST_MODEL_ID = new byte[] {1, 2, 3};
+    private static final byte[] ANTI_SPOOFING_KEY = new byte[] {4, 5, 6};
+    private static final String ACTION_URL = "ACTION_URL";
+    private static final int ACTION_URL_TYPE = 5;
+    private static final String APP_NAME = "APP_NAME";
+    private static final byte[] AUTHENTICATION_PUBLIC_KEY_SEC_P256R1 = new byte[] {5, 7};
+    private static final String DESCRIPTION = "DESCRIPTION";
+    private static final String DEVICE_NAME = "DEVICE_NAME";
+    private static final String DISPLAY_URL = "DISPLAY_URL";
+    private static final long FIRST_OBSERVATION_TIMESTAMP_MILLIS = 8393L;
+    private static final String  ICON_FIFE_URL = "ICON_FIFE_URL";
+    private static final byte[]  ICON_PNG = new byte[]{2, 5};
+    private static final String ID = "ID";
+    private static final long LAST_OBSERVATION_TIMESTAMP_MILLIS = 934234L;
+    private static final String MAC_ADDRESS = "MAC_ADDRESS";
+    private static final String NAME = "NAME";
+    private static final String PACKAGE_NAME = "PACKAGE_NAME";
+    private static final long PENDING_APP_INSTALL_TIMESTAMP_MILLIS = 832393L;
+    private static final int RSSI = 9;
+    private static final int STATE = 63;
+    private static final String TITLE = "TITLE";
+    private static final String TRIGGER_ID = "TRIGGER_ID";
+    private static final int TX_POWER = 62;
+
+    private static final int ELIGIBLE_ACCOUNTS_NUM = 2;
+    private static final ImmutableList<FastPairEligibleAccount> ELIGIBLE_ACCOUNTS =
+            ImmutableList.of(
+                    genHappyPathFastPairEligibleAccount(ELIGIBLE_ACCOUNT_1,
+                            ELIGIBLE_ACCOUNT_1_OPT_IN),
+                    genHappyPathFastPairEligibleAccount(ELIGIBLE_ACCOUNT_2,
+                            ELIGIBLE_ACCOUNT_2_OPT_IN));
+    private static final int ACCOUNTKEY_DEVICE_NUM = 2;
+    private static final ImmutableList<FastPairAccountKeyDeviceMetadata>
+            FAST_PAIR_ACCOUNT_DEVICES_METADATA =
+            ImmutableList.of(
+                    genHappyPathFastPairAccountkeyDeviceMetadata(),
+                    genHappyPathFastPairAccountkeyDeviceMetadata());
+
+    private static final FastPairAntispoofKeyDeviceMetadataRequestParcel
+            FAST_PAIR_ANTI_SPOOF_KEY_DEVICE_METADATA_REQUEST_PARCEL =
+            genFastPairAntispoofKeyDeviceMetadataRequestParcel();
+    private static final FastPairAccountDevicesMetadataRequestParcel
+            FAST_PAIR_ACCOUNT_DEVICES_METADATA_REQUEST_PARCEL =
+            genFastPairAccountDevicesMetadataRequestParcel();
+    private static final FastPairEligibleAccountsRequestParcel
+            FAST_PAIR_ELIGIBLE_ACCOUNTS_REQUEST_PARCEL =
+            genFastPairEligibleAccountsRequestParcel();
+    private static final FastPairManageAccountRequestParcel
+            FAST_PAIR_MANAGE_ACCOUNT_REQUEST_PARCEL =
+            genFastPairManageAccountRequestParcel();
+    private static final FastPairManageAccountDeviceRequestParcel
+            FAST_PAIR_MANAGE_ACCOUNT_DEVICE_REQUEST_PARCEL =
+            genFastPairManageAccountDeviceRequestParcel();
+    private static final FastPairAntispoofKeyDeviceMetadata
+            HAPPY_PATH_FAST_PAIR_ANTI_SPOOF_KEY_DEVICE_METADATA =
+            genHappyPathFastPairAntispoofKeyDeviceMetadata();
+
+    @Captor private ArgumentCaptor<FastPairEligibleAccountParcel[]>
+            mFastPairEligibleAccountParcelsArgumentCaptor;
+    @Captor private ArgumentCaptor<FastPairAccountKeyDeviceMetadataParcel[]>
+            mFastPairAccountKeyDeviceMetadataParcelsArgumentCaptor;
+
+    @Mock private FastPairDataProviderService mMockFastPairDataProviderService;
+    @Mock private IFastPairAntispoofKeyDeviceMetadataCallback.Stub
+            mAntispoofKeyDeviceMetadataCallback;
+    @Mock private IFastPairAccountDevicesMetadataCallback.Stub mAccountDevicesMetadataCallback;
+    @Mock private IFastPairEligibleAccountsCallback.Stub mEligibleAccountsCallback;
+    @Mock private IFastPairManageAccountCallback.Stub mManageAccountCallback;
+    @Mock private IFastPairManageAccountDeviceCallback.Stub mManageAccountDeviceCallback;
+
+    private MyHappyPathProvider mHappyPathFastPairDataProvider;
+    private MyErrorPathProvider mErrorPathFastPairDataProvider;
+
+    @Before
+    public void setUp() throws Exception {
+        initMocks(this);
+
+        mHappyPathFastPairDataProvider =
+                new MyHappyPathProvider(TAG, mMockFastPairDataProviderService);
+        mErrorPathFastPairDataProvider =
+                new MyErrorPathProvider(TAG, mMockFastPairDataProviderService);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testHappyPathLoadFastPairAntispoofKeyDeviceMetadata() throws Exception {
+        // AOSP sends calls to OEM via Parcelable.
+        mHappyPathFastPairDataProvider.asProvider().loadFastPairAntispoofKeyDeviceMetadata(
+                FAST_PAIR_ANTI_SPOOF_KEY_DEVICE_METADATA_REQUEST_PARCEL,
+                mAntispoofKeyDeviceMetadataCallback);
+
+        // OEM receives request and verifies that it is as expected.
+        final ArgumentCaptor<FastPairDataProviderService.FastPairAntispoofKeyDeviceMetadataRequest>
+                fastPairAntispoofKeyDeviceMetadataRequestCaptor =
+                ArgumentCaptor.forClass(
+                        FastPairDataProviderService.FastPairAntispoofKeyDeviceMetadataRequest.class
+                );
+        verify(mMockFastPairDataProviderService).onLoadFastPairAntispoofKeyDeviceMetadata(
+                fastPairAntispoofKeyDeviceMetadataRequestCaptor.capture(),
+                any(FastPairDataProviderService.FastPairAntispoofKeyDeviceMetadataCallback.class));
+        ensureHappyPathAsExpected(fastPairAntispoofKeyDeviceMetadataRequestCaptor.getValue());
+
+        // AOSP receives responses and verifies that it is as expected.
+        final ArgumentCaptor<FastPairAntispoofKeyDeviceMetadataParcel>
+                fastPairAntispoofKeyDeviceMetadataParcelCaptor =
+                ArgumentCaptor.forClass(FastPairAntispoofKeyDeviceMetadataParcel.class);
+        verify(mAntispoofKeyDeviceMetadataCallback).onFastPairAntispoofKeyDeviceMetadataReceived(
+                fastPairAntispoofKeyDeviceMetadataParcelCaptor.capture());
+        ensureHappyPathAsExpected(fastPairAntispoofKeyDeviceMetadataParcelCaptor.getValue());
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testHappyPathLoadFastPairAccountDevicesMetadata() throws Exception {
+        // AOSP sends calls to OEM via Parcelable.
+        mHappyPathFastPairDataProvider.asProvider().loadFastPairAccountDevicesMetadata(
+                FAST_PAIR_ACCOUNT_DEVICES_METADATA_REQUEST_PARCEL,
+                mAccountDevicesMetadataCallback);
+
+        // OEM receives request and verifies that it is as expected.
+        final ArgumentCaptor<FastPairDataProviderService.FastPairAccountDevicesMetadataRequest>
+                fastPairAccountDevicesMetadataRequestCaptor =
+                ArgumentCaptor.forClass(
+                        FastPairDataProviderService.FastPairAccountDevicesMetadataRequest.class);
+        verify(mMockFastPairDataProviderService).onLoadFastPairAccountDevicesMetadata(
+                fastPairAccountDevicesMetadataRequestCaptor.capture(),
+                any(FastPairDataProviderService.FastPairAccountDevicesMetadataCallback.class));
+        ensureHappyPathAsExpected(fastPairAccountDevicesMetadataRequestCaptor.getValue());
+
+        // AOSP receives responses and verifies that it is as expected.
+        verify(mAccountDevicesMetadataCallback).onFastPairAccountDevicesMetadataReceived(
+                mFastPairAccountKeyDeviceMetadataParcelsArgumentCaptor.capture());
+        ensureHappyPathAsExpected(
+                mFastPairAccountKeyDeviceMetadataParcelsArgumentCaptor.getValue());
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testHappyPathLoadFastPairEligibleAccounts() throws Exception {
+        // AOSP sends calls to OEM via Parcelable.
+        mHappyPathFastPairDataProvider.asProvider().loadFastPairEligibleAccounts(
+                FAST_PAIR_ELIGIBLE_ACCOUNTS_REQUEST_PARCEL,
+                mEligibleAccountsCallback);
+
+        // OEM receives request and verifies that it is as expected.
+        final ArgumentCaptor<FastPairDataProviderService.FastPairEligibleAccountsRequest>
+                fastPairEligibleAccountsRequestCaptor =
+                ArgumentCaptor.forClass(
+                        FastPairDataProviderService.FastPairEligibleAccountsRequest.class);
+        verify(mMockFastPairDataProviderService).onLoadFastPairEligibleAccounts(
+                fastPairEligibleAccountsRequestCaptor.capture(),
+                any(FastPairDataProviderService.FastPairEligibleAccountsCallback.class));
+        ensureHappyPathAsExpected(fastPairEligibleAccountsRequestCaptor.getValue());
+
+        // AOSP receives responses and verifies that it is as expected.
+        verify(mEligibleAccountsCallback).onFastPairEligibleAccountsReceived(
+                mFastPairEligibleAccountParcelsArgumentCaptor.capture());
+        ensureHappyPathAsExpected(mFastPairEligibleAccountParcelsArgumentCaptor.getValue());
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testHappyPathManageFastPairAccount() throws Exception {
+        // AOSP sends calls to OEM via Parcelable.
+        mHappyPathFastPairDataProvider.asProvider().manageFastPairAccount(
+                FAST_PAIR_MANAGE_ACCOUNT_REQUEST_PARCEL,
+                mManageAccountCallback);
+
+        // OEM receives request and verifies that it is as expected.
+        final ArgumentCaptor<FastPairDataProviderService.FastPairManageAccountRequest>
+                fastPairManageAccountRequestCaptor =
+                ArgumentCaptor.forClass(
+                        FastPairDataProviderService.FastPairManageAccountRequest.class);
+        verify(mMockFastPairDataProviderService).onManageFastPairAccount(
+                fastPairManageAccountRequestCaptor.capture(),
+                any(FastPairDataProviderService.FastPairManageActionCallback.class));
+        ensureHappyPathAsExpected(fastPairManageAccountRequestCaptor.getValue());
+
+        // AOSP receives SUCCESS response.
+        verify(mManageAccountCallback).onSuccess();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testHappyPathManageFastPairAccountDevice() throws Exception {
+        // AOSP sends calls to OEM via Parcelable.
+        mHappyPathFastPairDataProvider.asProvider().manageFastPairAccountDevice(
+                FAST_PAIR_MANAGE_ACCOUNT_DEVICE_REQUEST_PARCEL,
+                mManageAccountDeviceCallback);
+
+        // OEM receives request and verifies that it is as expected.
+        final ArgumentCaptor<FastPairDataProviderService.FastPairManageAccountDeviceRequest>
+                fastPairManageAccountDeviceRequestCaptor =
+                ArgumentCaptor.forClass(
+                        FastPairDataProviderService.FastPairManageAccountDeviceRequest.class);
+        verify(mMockFastPairDataProviderService).onManageFastPairAccountDevice(
+                fastPairManageAccountDeviceRequestCaptor.capture(),
+                any(FastPairDataProviderService.FastPairManageActionCallback.class));
+        ensureHappyPathAsExpected(fastPairManageAccountDeviceRequestCaptor.getValue());
+
+        // AOSP receives SUCCESS response.
+        verify(mManageAccountDeviceCallback).onSuccess();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testErrorPathLoadFastPairAntispoofKeyDeviceMetadata() throws Exception {
+        mErrorPathFastPairDataProvider.asProvider().loadFastPairAntispoofKeyDeviceMetadata(
+                FAST_PAIR_ANTI_SPOOF_KEY_DEVICE_METADATA_REQUEST_PARCEL,
+                mAntispoofKeyDeviceMetadataCallback);
+        verify(mMockFastPairDataProviderService).onLoadFastPairAntispoofKeyDeviceMetadata(
+                any(FastPairDataProviderService.FastPairAntispoofKeyDeviceMetadataRequest.class),
+                any(FastPairDataProviderService.FastPairAntispoofKeyDeviceMetadataCallback.class));
+        verify(mAntispoofKeyDeviceMetadataCallback).onError(
+                eq(ERROR_CODE_BAD_REQUEST), eq(ERROR_STRING));
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testErrorPathLoadFastPairAccountDevicesMetadata() throws Exception {
+        mErrorPathFastPairDataProvider.asProvider().loadFastPairAccountDevicesMetadata(
+                FAST_PAIR_ACCOUNT_DEVICES_METADATA_REQUEST_PARCEL,
+                mAccountDevicesMetadataCallback);
+        verify(mMockFastPairDataProviderService).onLoadFastPairAccountDevicesMetadata(
+                any(FastPairDataProviderService.FastPairAccountDevicesMetadataRequest.class),
+                any(FastPairDataProviderService.FastPairAccountDevicesMetadataCallback.class));
+        verify(mAccountDevicesMetadataCallback).onError(
+                eq(ERROR_CODE_BAD_REQUEST), eq(ERROR_STRING));
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testErrorPathLoadFastPairEligibleAccounts() throws Exception {
+        mErrorPathFastPairDataProvider.asProvider().loadFastPairEligibleAccounts(
+                FAST_PAIR_ELIGIBLE_ACCOUNTS_REQUEST_PARCEL,
+                mEligibleAccountsCallback);
+        verify(mMockFastPairDataProviderService).onLoadFastPairEligibleAccounts(
+                any(FastPairDataProviderService.FastPairEligibleAccountsRequest.class),
+                any(FastPairDataProviderService.FastPairEligibleAccountsCallback.class));
+        verify(mEligibleAccountsCallback).onError(
+                eq(ERROR_CODE_BAD_REQUEST), eq(ERROR_STRING));
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testErrorPathManageFastPairAccount() throws Exception {
+        mErrorPathFastPairDataProvider.asProvider().manageFastPairAccount(
+                FAST_PAIR_MANAGE_ACCOUNT_REQUEST_PARCEL,
+                mManageAccountCallback);
+        verify(mMockFastPairDataProviderService).onManageFastPairAccount(
+                any(FastPairDataProviderService.FastPairManageAccountRequest.class),
+                any(FastPairDataProviderService.FastPairManageActionCallback.class));
+        verify(mManageAccountCallback).onError(eq(ERROR_CODE_BAD_REQUEST), eq(ERROR_STRING));
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testErrorPathManageFastPairAccountDevice() throws Exception {
+        mErrorPathFastPairDataProvider.asProvider().manageFastPairAccountDevice(
+                FAST_PAIR_MANAGE_ACCOUNT_DEVICE_REQUEST_PARCEL,
+                mManageAccountDeviceCallback);
+        verify(mMockFastPairDataProviderService).onManageFastPairAccountDevice(
+                any(FastPairDataProviderService.FastPairManageAccountDeviceRequest.class),
+                any(FastPairDataProviderService.FastPairManageActionCallback.class));
+        verify(mManageAccountDeviceCallback).onError(eq(ERROR_CODE_BAD_REQUEST), eq(ERROR_STRING));
+    }
+
+    public static class MyHappyPathProvider extends FastPairDataProviderService {
+
+        private final FastPairDataProviderService mMockFastPairDataProviderService;
+
+        public MyHappyPathProvider(@NonNull String tag, FastPairDataProviderService mock) {
+            super(tag);
+            mMockFastPairDataProviderService = mock;
+        }
+
+        public IFastPairDataProvider asProvider() {
+            Intent intent = new Intent();
+            return IFastPairDataProvider.Stub.asInterface(onBind(intent));
+        }
+
+        @Override
+        public void onLoadFastPairAntispoofKeyDeviceMetadata(
+                @NonNull FastPairAntispoofKeyDeviceMetadataRequest request,
+                @NonNull FastPairAntispoofKeyDeviceMetadataCallback callback) {
+            mMockFastPairDataProviderService.onLoadFastPairAntispoofKeyDeviceMetadata(
+                    request, callback);
+            callback.onFastPairAntispoofKeyDeviceMetadataReceived(
+                    HAPPY_PATH_FAST_PAIR_ANTI_SPOOF_KEY_DEVICE_METADATA);
+        }
+
+        @Override
+        public void onLoadFastPairAccountDevicesMetadata(
+                @NonNull FastPairAccountDevicesMetadataRequest request,
+                @NonNull FastPairAccountDevicesMetadataCallback callback) {
+            mMockFastPairDataProviderService.onLoadFastPairAccountDevicesMetadata(
+                    request, callback);
+            callback.onFastPairAccountDevicesMetadataReceived(FAST_PAIR_ACCOUNT_DEVICES_METADATA);
+        }
+
+        @Override
+        public void onLoadFastPairEligibleAccounts(
+                @NonNull FastPairEligibleAccountsRequest request,
+                @NonNull FastPairEligibleAccountsCallback callback) {
+            mMockFastPairDataProviderService.onLoadFastPairEligibleAccounts(
+                    request, callback);
+            callback.onFastPairEligibleAccountsReceived(ELIGIBLE_ACCOUNTS);
+        }
+
+        @Override
+        public void onManageFastPairAccount(
+                @NonNull FastPairManageAccountRequest request,
+                @NonNull FastPairManageActionCallback callback) {
+            mMockFastPairDataProviderService.onManageFastPairAccount(request, callback);
+            callback.onSuccess();
+        }
+
+        @Override
+        public void onManageFastPairAccountDevice(
+                @NonNull FastPairManageAccountDeviceRequest request,
+                @NonNull FastPairManageActionCallback callback) {
+            mMockFastPairDataProviderService.onManageFastPairAccountDevice(request, callback);
+            callback.onSuccess();
+        }
+    }
+
+    public static class MyErrorPathProvider extends FastPairDataProviderService {
+
+        private final FastPairDataProviderService mMockFastPairDataProviderService;
+
+        public MyErrorPathProvider(@NonNull String tag, FastPairDataProviderService mock) {
+            super(tag);
+            mMockFastPairDataProviderService = mock;
+        }
+
+        public IFastPairDataProvider asProvider() {
+            Intent intent = new Intent();
+            return IFastPairDataProvider.Stub.asInterface(onBind(intent));
+        }
+
+        @Override
+        public void onLoadFastPairAntispoofKeyDeviceMetadata(
+                @NonNull FastPairAntispoofKeyDeviceMetadataRequest request,
+                @NonNull FastPairAntispoofKeyDeviceMetadataCallback callback) {
+            mMockFastPairDataProviderService.onLoadFastPairAntispoofKeyDeviceMetadata(
+                    request, callback);
+            callback.onError(ERROR_CODE_BAD_REQUEST, ERROR_STRING);
+        }
+
+        @Override
+        public void onLoadFastPairAccountDevicesMetadata(
+                @NonNull FastPairAccountDevicesMetadataRequest request,
+                @NonNull FastPairAccountDevicesMetadataCallback callback) {
+            mMockFastPairDataProviderService.onLoadFastPairAccountDevicesMetadata(
+                    request, callback);
+            callback.onError(ERROR_CODE_BAD_REQUEST, ERROR_STRING);
+        }
+
+        @Override
+        public void onLoadFastPairEligibleAccounts(
+                @NonNull FastPairEligibleAccountsRequest request,
+                @NonNull FastPairEligibleAccountsCallback callback) {
+            mMockFastPairDataProviderService.onLoadFastPairEligibleAccounts(request, callback);
+            callback.onError(ERROR_CODE_BAD_REQUEST, ERROR_STRING);
+        }
+
+        @Override
+        public void onManageFastPairAccount(
+                @NonNull FastPairManageAccountRequest request,
+                @NonNull FastPairManageActionCallback callback) {
+            mMockFastPairDataProviderService.onManageFastPairAccount(request, callback);
+            callback.onError(ERROR_CODE_BAD_REQUEST, ERROR_STRING);
+        }
+
+        @Override
+        public void onManageFastPairAccountDevice(
+                @NonNull FastPairManageAccountDeviceRequest request,
+                @NonNull FastPairManageActionCallback callback) {
+            mMockFastPairDataProviderService.onManageFastPairAccountDevice(request, callback);
+            callback.onError(ERROR_CODE_BAD_REQUEST, ERROR_STRING);
+        }
+    }
+
+    /* Generates AntispoofKeyDeviceMetadataRequestParcel. */
+    private static FastPairAntispoofKeyDeviceMetadataRequestParcel
+            genFastPairAntispoofKeyDeviceMetadataRequestParcel() {
+        FastPairAntispoofKeyDeviceMetadataRequestParcel requestParcel =
+                new FastPairAntispoofKeyDeviceMetadataRequestParcel();
+        requestParcel.modelId = REQUEST_MODEL_ID;
+
+        return requestParcel;
+    }
+
+    /* Generates AccountDevicesMetadataRequestParcel. */
+    private static FastPairAccountDevicesMetadataRequestParcel
+            genFastPairAccountDevicesMetadataRequestParcel() {
+        FastPairAccountDevicesMetadataRequestParcel requestParcel =
+                new FastPairAccountDevicesMetadataRequestParcel();
+
+        requestParcel.account = ACCOUNTDEVICES_METADATA_ACCOUNT;
+        requestParcel.deviceAccountKeys = new ByteArrayParcel[NUM_ACCOUNT_DEVICES];
+        requestParcel.deviceAccountKeys[0] = new ByteArrayParcel();
+        requestParcel.deviceAccountKeys[1] = new ByteArrayParcel();
+        requestParcel.deviceAccountKeys[0].byteArray = ACCOUNT_KEY;
+        requestParcel.deviceAccountKeys[1].byteArray = ACCOUNT_KEY_2;
+
+        return requestParcel;
+    }
+
+    /* Generates FastPairEligibleAccountsRequestParcel. */
+    private static FastPairEligibleAccountsRequestParcel
+            genFastPairEligibleAccountsRequestParcel() {
+        FastPairEligibleAccountsRequestParcel requestParcel =
+                new FastPairEligibleAccountsRequestParcel();
+        // No fields since FastPairEligibleAccountsRequestParcel is just a place holder now.
+        return requestParcel;
+    }
+
+    /* Generates FastPairManageAccountRequestParcel. */
+    private static FastPairManageAccountRequestParcel
+            genFastPairManageAccountRequestParcel() {
+        FastPairManageAccountRequestParcel requestParcel =
+                new FastPairManageAccountRequestParcel();
+        requestParcel.account = MANAGE_ACCOUNT;
+        requestParcel.requestType = MANAGE_ACCOUNT_REQUEST_TYPE;
+
+        return requestParcel;
+    }
+
+    /* Generates FastPairManageAccountDeviceRequestParcel. */
+    private static FastPairManageAccountDeviceRequestParcel
+            genFastPairManageAccountDeviceRequestParcel() {
+        FastPairManageAccountDeviceRequestParcel requestParcel =
+                new FastPairManageAccountDeviceRequestParcel();
+        requestParcel.account = MANAGE_ACCOUNT;
+        requestParcel.requestType = MANAGE_ACCOUNT_REQUEST_TYPE;
+        requestParcel.accountKeyDeviceMetadata =
+                genHappyPathFastPairAccountkeyDeviceMetadataParcel();
+
+        return requestParcel;
+    }
+
+    /* Generates Happy Path AntispoofKeyDeviceMetadata. */
+    private static FastPairAntispoofKeyDeviceMetadata
+            genHappyPathFastPairAntispoofKeyDeviceMetadata() {
+        FastPairAntispoofKeyDeviceMetadata.Builder builder =
+                new FastPairAntispoofKeyDeviceMetadata.Builder();
+        builder.setAntispoofPublicKey(ANTI_SPOOFING_KEY);
+        builder.setFastPairDeviceMetadata(genHappyPathFastPairDeviceMetadata());
+
+        return builder.build();
+    }
+
+    /* Generates Happy Path FastPairAccountKeyDeviceMetadata. */
+    private static FastPairAccountKeyDeviceMetadata
+            genHappyPathFastPairAccountkeyDeviceMetadata() {
+        FastPairAccountKeyDeviceMetadata.Builder builder =
+                new FastPairAccountKeyDeviceMetadata.Builder();
+        builder.setDeviceAccountKey(ACCOUNT_KEY);
+        builder.setFastPairDeviceMetadata(genHappyPathFastPairDeviceMetadata());
+        builder.setSha256DeviceAccountKeyPublicAddress(SHA256_ACCOUNT_KEY_PUBLIC_ADDRESS);
+        builder.setFastPairDiscoveryItem(genHappyPathFastPairDiscoveryItem());
+
+        return builder.build();
+    }
+
+    /* Generates Happy Path FastPairAccountKeyDeviceMetadataParcel. */
+    private static FastPairAccountKeyDeviceMetadataParcel
+            genHappyPathFastPairAccountkeyDeviceMetadataParcel() {
+        FastPairAccountKeyDeviceMetadataParcel parcel =
+                new FastPairAccountKeyDeviceMetadataParcel();
+        parcel.deviceAccountKey = ACCOUNT_KEY;
+        parcel.metadata = genHappyPathFastPairDeviceMetadataParcel();
+        parcel.sha256DeviceAccountKeyPublicAddress = SHA256_ACCOUNT_KEY_PUBLIC_ADDRESS;
+        parcel.discoveryItem = genHappyPathFastPairDiscoveryItemParcel();
+
+        return parcel;
+    }
+
+    /* Generates Happy Path DiscoveryItem. */
+    private static FastPairDiscoveryItem genHappyPathFastPairDiscoveryItem() {
+        FastPairDiscoveryItem.Builder builder = new FastPairDiscoveryItem.Builder();
+
+        builder.setActionUrl(ACTION_URL);
+        builder.setActionUrlType(ACTION_URL_TYPE);
+        builder.setAppName(APP_NAME);
+        builder.setAuthenticationPublicKeySecp256r1(AUTHENTICATION_PUBLIC_KEY_SEC_P256R1);
+        builder.setDescription(DESCRIPTION);
+        builder.setDeviceName(DEVICE_NAME);
+        builder.setDisplayUrl(DISPLAY_URL);
+        builder.setFirstObservationTimestampMillis(FIRST_OBSERVATION_TIMESTAMP_MILLIS);
+        builder.setIconFfeUrl(ICON_FIFE_URL);
+        builder.setIconPng(ICON_PNG);
+        builder.setId(ID);
+        builder.setLastObservationTimestampMillis(LAST_OBSERVATION_TIMESTAMP_MILLIS);
+        builder.setMacAddress(MAC_ADDRESS);
+        builder.setPackageName(PACKAGE_NAME);
+        builder.setPendingAppInstallTimestampMillis(PENDING_APP_INSTALL_TIMESTAMP_MILLIS);
+        builder.setRssi(RSSI);
+        builder.setState(STATE);
+        builder.setTitle(TITLE);
+        builder.setTriggerId(TRIGGER_ID);
+        builder.setTxPower(TX_POWER);
+
+        return builder.build();
+    }
+
+    /* Generates Happy Path DiscoveryItemParcel. */
+    private static FastPairDiscoveryItemParcel genHappyPathFastPairDiscoveryItemParcel() {
+        FastPairDiscoveryItemParcel parcel = new FastPairDiscoveryItemParcel();
+
+        parcel.actionUrl = ACTION_URL;
+        parcel.actionUrlType = ACTION_URL_TYPE;
+        parcel.appName = APP_NAME;
+        parcel.authenticationPublicKeySecp256r1 = AUTHENTICATION_PUBLIC_KEY_SEC_P256R1;
+        parcel.description = DESCRIPTION;
+        parcel.deviceName = DEVICE_NAME;
+        parcel.displayUrl = DISPLAY_URL;
+        parcel.firstObservationTimestampMillis = FIRST_OBSERVATION_TIMESTAMP_MILLIS;
+        parcel.iconFifeUrl = ICON_FIFE_URL;
+        parcel.iconPng = ICON_PNG;
+        parcel.id = ID;
+        parcel.lastObservationTimestampMillis = LAST_OBSERVATION_TIMESTAMP_MILLIS;
+        parcel.macAddress = MAC_ADDRESS;
+        parcel.packageName = PACKAGE_NAME;
+        parcel.pendingAppInstallTimestampMillis = PENDING_APP_INSTALL_TIMESTAMP_MILLIS;
+        parcel.rssi = RSSI;
+        parcel.state = STATE;
+        parcel.title = TITLE;
+        parcel.triggerId = TRIGGER_ID;
+        parcel.txPower = TX_POWER;
+
+        return parcel;
+    }
+
+    /* Generates Happy Path DeviceMetadata. */
+    private static FastPairDeviceMetadata genHappyPathFastPairDeviceMetadata() {
+        FastPairDeviceMetadata.Builder builder = new FastPairDeviceMetadata.Builder();
+        builder.setBleTxPower(BLE_TX_POWER);
+        builder.setConnectSuccessCompanionAppInstalled(CONNECT_SUCCESS_COMPANION_APP_INSTALLED);
+        builder.setConnectSuccessCompanionAppNotInstalled(
+                CONNECT_SUCCESS_COMPANION_APP_NOT_INSTALLED);
+        builder.setDeviceType(DEVICE_TYPE);
+        builder.setDownloadCompanionAppDescription(DOWNLOAD_COMPANION_APP_DESCRIPTION);
+        builder.setFailConnectGoToSettingsDescription(FAIL_CONNECT_GOTO_SETTINGS_DESCRIPTION);
+        builder.setImage(IMAGE);
+        builder.setImageUrl(IMAGE_URL);
+        builder.setInitialNotificationDescription(INITIAL_NOTIFICATION_DESCRIPTION);
+        builder.setInitialNotificationDescriptionNoAccount(
+                INITIAL_NOTIFICATION_DESCRIPTION_NO_ACCOUNT);
+        builder.setInitialPairingDescription(INITIAL_PAIRING_DESCRIPTION);
+        builder.setIntentUri(INTENT_URI);
+        builder.setName(NAME);
+        builder.setOpenCompanionAppDescription(OPEN_COMPANION_APP_DESCRIPTION);
+        builder.setRetroactivePairingDescription(RETRO_ACTIVE_PAIRING_DESCRIPTION);
+        builder.setSubsequentPairingDescription(SUBSEQUENT_PAIRING_DESCRIPTION);
+        builder.setTriggerDistance(TRIGGER_DISTANCE);
+        builder.setTrueWirelessImageUrlCase(TRUE_WIRELESS_IMAGE_URL_CASE);
+        builder.setTrueWirelessImageUrlLeftBud(TRUE_WIRELESS_IMAGE_URL_LEFT_BUD);
+        builder.setTrueWirelessImageUrlRightBud(TRUE_WIRELESS_IMAGE_URL_RIGHT_BUD);
+        builder.setUnableToConnectDescription(UNABLE_TO_CONNECT_DESCRIPTION);
+        builder.setUnableToConnectTitle(UNABLE_TO_CONNECT_TITLE);
+        builder.setUpdateCompanionAppDescription(UPDATE_COMPANION_APP_DESCRIPTION);
+        builder.setWaitLaunchCompanionAppDescription(WAIT_LAUNCH_COMPANION_APP_DESCRIPTION);
+
+        return builder.build();
+    }
+
+    /* Generates Happy Path DeviceMetadataParcel. */
+    private static FastPairDeviceMetadataParcel genHappyPathFastPairDeviceMetadataParcel() {
+        FastPairDeviceMetadataParcel parcel = new FastPairDeviceMetadataParcel();
+
+        parcel.bleTxPower = BLE_TX_POWER;
+        parcel.connectSuccessCompanionAppInstalled = CONNECT_SUCCESS_COMPANION_APP_INSTALLED;
+        parcel.connectSuccessCompanionAppNotInstalled =
+                CONNECT_SUCCESS_COMPANION_APP_NOT_INSTALLED;
+        parcel.deviceType = DEVICE_TYPE;
+        parcel.downloadCompanionAppDescription = DOWNLOAD_COMPANION_APP_DESCRIPTION;
+        parcel.failConnectGoToSettingsDescription = FAIL_CONNECT_GOTO_SETTINGS_DESCRIPTION;
+        parcel.image = IMAGE;
+        parcel.imageUrl = IMAGE_URL;
+        parcel.initialNotificationDescription = INITIAL_NOTIFICATION_DESCRIPTION;
+        parcel.initialNotificationDescriptionNoAccount =
+                INITIAL_NOTIFICATION_DESCRIPTION_NO_ACCOUNT;
+        parcel.initialPairingDescription = INITIAL_PAIRING_DESCRIPTION;
+        parcel.intentUri = INTENT_URI;
+        parcel.name = NAME;
+        parcel.openCompanionAppDescription = OPEN_COMPANION_APP_DESCRIPTION;
+        parcel.retroactivePairingDescription = RETRO_ACTIVE_PAIRING_DESCRIPTION;
+        parcel.subsequentPairingDescription = SUBSEQUENT_PAIRING_DESCRIPTION;
+        parcel.triggerDistance = TRIGGER_DISTANCE;
+        parcel.trueWirelessImageUrlCase = TRUE_WIRELESS_IMAGE_URL_CASE;
+        parcel.trueWirelessImageUrlLeftBud = TRUE_WIRELESS_IMAGE_URL_LEFT_BUD;
+        parcel.trueWirelessImageUrlRightBud = TRUE_WIRELESS_IMAGE_URL_RIGHT_BUD;
+        parcel.unableToConnectDescription = UNABLE_TO_CONNECT_DESCRIPTION;
+        parcel.unableToConnectTitle = UNABLE_TO_CONNECT_TITLE;
+        parcel.updateCompanionAppDescription = UPDATE_COMPANION_APP_DESCRIPTION;
+        parcel.waitLaunchCompanionAppDescription = WAIT_LAUNCH_COMPANION_APP_DESCRIPTION;
+
+        return parcel;
+    }
+
+    /* Generates Happy Path FastPairEligibleAccount. */
+    private static FastPairEligibleAccount genHappyPathFastPairEligibleAccount(
+            Account account, boolean optIn) {
+        FastPairEligibleAccount.Builder builder = new FastPairEligibleAccount.Builder();
+        builder.setAccount(account);
+        builder.setOptIn(optIn);
+
+        return builder.build();
+    }
+
+    /* Verifies Happy Path AntispoofKeyDeviceMetadataRequest. */
+    private static void ensureHappyPathAsExpected(
+            FastPairDataProviderService.FastPairAntispoofKeyDeviceMetadataRequest request) {
+        assertThat(request.getModelId()).isEqualTo(REQUEST_MODEL_ID);
+    }
+
+    /* Verifies Happy Path AccountDevicesMetadataRequest. */
+    private static void ensureHappyPathAsExpected(
+            FastPairDataProviderService.FastPairAccountDevicesMetadataRequest request) {
+        assertThat(request.getAccount()).isEqualTo(ACCOUNTDEVICES_METADATA_ACCOUNT);
+        assertThat(request.getDeviceAccountKeys().size()).isEqualTo(ACCOUNTKEY_DEVICE_NUM);
+        assertThat(request.getDeviceAccountKeys()).contains(ACCOUNT_KEY);
+        assertThat(request.getDeviceAccountKeys()).contains(ACCOUNT_KEY_2);
+    }
+
+    /* Verifies Happy Path FastPairEligibleAccountsRequest. */
+    @SuppressWarnings("UnusedVariable")
+    private static void ensureHappyPathAsExpected(
+            FastPairDataProviderService.FastPairEligibleAccountsRequest request) {
+        // No fields since FastPairEligibleAccountsRequest is just a place holder now.
+    }
+
+    /* Verifies Happy Path FastPairManageAccountRequest. */
+    private static void ensureHappyPathAsExpected(
+            FastPairDataProviderService.FastPairManageAccountRequest request) {
+        assertThat(request.getAccount()).isEqualTo(MANAGE_ACCOUNT);
+        assertThat(request.getRequestType()).isEqualTo(MANAGE_ACCOUNT_REQUEST_TYPE);
+    }
+
+    /* Verifies Happy Path FastPairManageAccountDeviceRequest. */
+    private static void ensureHappyPathAsExpected(
+            FastPairDataProviderService.FastPairManageAccountDeviceRequest request) {
+        assertThat(request.getAccount()).isEqualTo(MANAGE_ACCOUNT);
+        assertThat(request.getRequestType()).isEqualTo(MANAGE_ACCOUNT_REQUEST_TYPE);
+        ensureHappyPathAsExpected(request.getAccountKeyDeviceMetadata());
+    }
+
+    /* Verifies Happy Path AntispoofKeyDeviceMetadataParcel. */
+    private static void ensureHappyPathAsExpected(
+            FastPairAntispoofKeyDeviceMetadataParcel metadataParcel) {
+        assertThat(metadataParcel).isNotNull();
+        assertThat(metadataParcel.antispoofPublicKey).isEqualTo(ANTI_SPOOFING_KEY);
+        ensureHappyPathAsExpected(metadataParcel.deviceMetadata);
+    }
+
+    /* Verifies Happy Path FastPairAccountKeyDeviceMetadataParcel[]. */
+    private static void ensureHappyPathAsExpected(
+            FastPairAccountKeyDeviceMetadataParcel[] metadataParcels) {
+        assertThat(metadataParcels).isNotNull();
+        assertThat(metadataParcels).hasLength(ACCOUNTKEY_DEVICE_NUM);
+        for (FastPairAccountKeyDeviceMetadataParcel parcel: metadataParcels) {
+            ensureHappyPathAsExpected(parcel);
+        }
+    }
+
+    /* Verifies Happy Path FastPairAccountKeyDeviceMetadataParcel. */
+    private static void ensureHappyPathAsExpected(
+            FastPairAccountKeyDeviceMetadataParcel metadataParcel) {
+        assertThat(metadataParcel).isNotNull();
+        assertThat(metadataParcel.deviceAccountKey).isEqualTo(ACCOUNT_KEY);
+        assertThat(metadataParcel.sha256DeviceAccountKeyPublicAddress)
+                .isEqualTo(SHA256_ACCOUNT_KEY_PUBLIC_ADDRESS);
+        ensureHappyPathAsExpected(metadataParcel.metadata);
+        ensureHappyPathAsExpected(metadataParcel.discoveryItem);
+    }
+
+    /* Verifies Happy Path FastPairAccountKeyDeviceMetadata. */
+    private static void ensureHappyPathAsExpected(
+            FastPairAccountKeyDeviceMetadata metadata) {
+        assertThat(metadata.getDeviceAccountKey()).isEqualTo(ACCOUNT_KEY);
+        assertThat(metadata.getSha256DeviceAccountKeyPublicAddress())
+                .isEqualTo(SHA256_ACCOUNT_KEY_PUBLIC_ADDRESS);
+        ensureHappyPathAsExpected(metadata.getFastPairDeviceMetadata());
+        ensureHappyPathAsExpected(metadata.getFastPairDiscoveryItem());
+    }
+
+    /* Verifies Happy Path DeviceMetadataParcel. */
+    private static void ensureHappyPathAsExpected(FastPairDeviceMetadataParcel metadataParcel) {
+        assertThat(metadataParcel).isNotNull();
+        assertThat(metadataParcel.bleTxPower).isEqualTo(BLE_TX_POWER);
+
+        assertThat(metadataParcel.connectSuccessCompanionAppInstalled).isEqualTo(
+                CONNECT_SUCCESS_COMPANION_APP_INSTALLED);
+        assertThat(metadataParcel.connectSuccessCompanionAppNotInstalled).isEqualTo(
+                CONNECT_SUCCESS_COMPANION_APP_NOT_INSTALLED);
+
+        assertThat(metadataParcel.deviceType).isEqualTo(DEVICE_TYPE);
+        assertThat(metadataParcel.downloadCompanionAppDescription).isEqualTo(
+                DOWNLOAD_COMPANION_APP_DESCRIPTION);
+
+        assertThat(metadataParcel.failConnectGoToSettingsDescription).isEqualTo(
+                FAIL_CONNECT_GOTO_SETTINGS_DESCRIPTION);
+
+        assertThat(metadataParcel.image).isEqualTo(IMAGE);
+        assertThat(metadataParcel.imageUrl).isEqualTo(IMAGE_URL);
+        assertThat(metadataParcel.initialNotificationDescription).isEqualTo(
+                INITIAL_NOTIFICATION_DESCRIPTION);
+        assertThat(metadataParcel.initialNotificationDescriptionNoAccount).isEqualTo(
+                INITIAL_NOTIFICATION_DESCRIPTION_NO_ACCOUNT);
+        assertThat(metadataParcel.initialPairingDescription).isEqualTo(INITIAL_PAIRING_DESCRIPTION);
+        assertThat(metadataParcel.intentUri).isEqualTo(INTENT_URI);
+
+        assertThat(metadataParcel.name).isEqualTo(NAME);
+
+        assertThat(metadataParcel.openCompanionAppDescription).isEqualTo(
+                OPEN_COMPANION_APP_DESCRIPTION);
+
+        assertThat(metadataParcel.retroactivePairingDescription).isEqualTo(
+                RETRO_ACTIVE_PAIRING_DESCRIPTION);
+
+        assertThat(metadataParcel.subsequentPairingDescription).isEqualTo(
+                SUBSEQUENT_PAIRING_DESCRIPTION);
+
+        assertThat(metadataParcel.triggerDistance).isWithin(DELTA).of(TRIGGER_DISTANCE);
+        assertThat(metadataParcel.trueWirelessImageUrlCase).isEqualTo(TRUE_WIRELESS_IMAGE_URL_CASE);
+        assertThat(metadataParcel.trueWirelessImageUrlLeftBud).isEqualTo(
+                TRUE_WIRELESS_IMAGE_URL_LEFT_BUD);
+        assertThat(metadataParcel.trueWirelessImageUrlRightBud).isEqualTo(
+                TRUE_WIRELESS_IMAGE_URL_RIGHT_BUD);
+
+        assertThat(metadataParcel.unableToConnectDescription).isEqualTo(
+                UNABLE_TO_CONNECT_DESCRIPTION);
+        assertThat(metadataParcel.unableToConnectTitle).isEqualTo(UNABLE_TO_CONNECT_TITLE);
+        assertThat(metadataParcel.updateCompanionAppDescription).isEqualTo(
+                UPDATE_COMPANION_APP_DESCRIPTION);
+
+        assertThat(metadataParcel.waitLaunchCompanionAppDescription).isEqualTo(
+                WAIT_LAUNCH_COMPANION_APP_DESCRIPTION);
+    }
+
+    /* Verifies Happy Path DeviceMetadata. */
+    private static void ensureHappyPathAsExpected(FastPairDeviceMetadata metadata) {
+        assertThat(metadata.getBleTxPower()).isEqualTo(BLE_TX_POWER);
+        assertThat(metadata.getConnectSuccessCompanionAppInstalled())
+                .isEqualTo(CONNECT_SUCCESS_COMPANION_APP_INSTALLED);
+        assertThat(metadata.getConnectSuccessCompanionAppNotInstalled())
+                .isEqualTo(CONNECT_SUCCESS_COMPANION_APP_NOT_INSTALLED);
+        assertThat(metadata.getDeviceType()).isEqualTo(DEVICE_TYPE);
+        assertThat(metadata.getDownloadCompanionAppDescription())
+                .isEqualTo(DOWNLOAD_COMPANION_APP_DESCRIPTION);
+        assertThat(metadata.getFailConnectGoToSettingsDescription())
+                .isEqualTo(FAIL_CONNECT_GOTO_SETTINGS_DESCRIPTION);
+        assertThat(metadata.getImage()).isEqualTo(IMAGE);
+        assertThat(metadata.getImageUrl()).isEqualTo(IMAGE_URL);
+        assertThat(metadata.getInitialNotificationDescription())
+                .isEqualTo(INITIAL_NOTIFICATION_DESCRIPTION);
+        assertThat(metadata.getInitialNotificationDescriptionNoAccount())
+                .isEqualTo(INITIAL_NOTIFICATION_DESCRIPTION_NO_ACCOUNT);
+        assertThat(metadata.getInitialPairingDescription()).isEqualTo(INITIAL_PAIRING_DESCRIPTION);
+        assertThat(metadata.getIntentUri()).isEqualTo(INTENT_URI);
+        assertThat(metadata.getName()).isEqualTo(NAME);
+        assertThat(metadata.getOpenCompanionAppDescription())
+                .isEqualTo(OPEN_COMPANION_APP_DESCRIPTION);
+        assertThat(metadata.getRetroactivePairingDescription())
+                .isEqualTo(RETRO_ACTIVE_PAIRING_DESCRIPTION);
+        assertThat(metadata.getSubsequentPairingDescription())
+                .isEqualTo(SUBSEQUENT_PAIRING_DESCRIPTION);
+        assertThat(metadata.getTriggerDistance()).isWithin(DELTA).of(TRIGGER_DISTANCE);
+        assertThat(metadata.getTrueWirelessImageUrlCase()).isEqualTo(TRUE_WIRELESS_IMAGE_URL_CASE);
+        assertThat(metadata.getTrueWirelessImageUrlLeftBud())
+                .isEqualTo(TRUE_WIRELESS_IMAGE_URL_LEFT_BUD);
+        assertThat(metadata.getTrueWirelessImageUrlRightBud())
+                .isEqualTo(TRUE_WIRELESS_IMAGE_URL_RIGHT_BUD);
+        assertThat(metadata.getUnableToConnectDescription())
+                .isEqualTo(UNABLE_TO_CONNECT_DESCRIPTION);
+        assertThat(metadata.getUnableToConnectTitle()).isEqualTo(UNABLE_TO_CONNECT_TITLE);
+        assertThat(metadata.getUpdateCompanionAppDescription())
+                .isEqualTo(UPDATE_COMPANION_APP_DESCRIPTION);
+        assertThat(metadata.getWaitLaunchCompanionAppDescription())
+                .isEqualTo(WAIT_LAUNCH_COMPANION_APP_DESCRIPTION);
+    }
+
+    /* Verifies Happy Path FastPairDiscoveryItemParcel. */
+    private static void ensureHappyPathAsExpected(FastPairDiscoveryItemParcel itemParcel) {
+        assertThat(itemParcel.actionUrl).isEqualTo(ACTION_URL);
+        assertThat(itemParcel.actionUrlType).isEqualTo(ACTION_URL_TYPE);
+        assertThat(itemParcel.appName).isEqualTo(APP_NAME);
+        assertThat(itemParcel.authenticationPublicKeySecp256r1)
+                .isEqualTo(AUTHENTICATION_PUBLIC_KEY_SEC_P256R1);
+        assertThat(itemParcel.description).isEqualTo(DESCRIPTION);
+        assertThat(itemParcel.deviceName).isEqualTo(DEVICE_NAME);
+        assertThat(itemParcel.displayUrl).isEqualTo(DISPLAY_URL);
+        assertThat(itemParcel.firstObservationTimestampMillis)
+                .isEqualTo(FIRST_OBSERVATION_TIMESTAMP_MILLIS);
+        assertThat(itemParcel.iconFifeUrl).isEqualTo(ICON_FIFE_URL);
+        assertThat(itemParcel.iconPng).isEqualTo(ICON_PNG);
+        assertThat(itemParcel.id).isEqualTo(ID);
+        assertThat(itemParcel.lastObservationTimestampMillis)
+                .isEqualTo(LAST_OBSERVATION_TIMESTAMP_MILLIS);
+        assertThat(itemParcel.macAddress).isEqualTo(MAC_ADDRESS);
+        assertThat(itemParcel.packageName).isEqualTo(PACKAGE_NAME);
+        assertThat(itemParcel.pendingAppInstallTimestampMillis)
+                .isEqualTo(PENDING_APP_INSTALL_TIMESTAMP_MILLIS);
+        assertThat(itemParcel.rssi).isEqualTo(RSSI);
+        assertThat(itemParcel.state).isEqualTo(STATE);
+        assertThat(itemParcel.title).isEqualTo(TITLE);
+        assertThat(itemParcel.triggerId).isEqualTo(TRIGGER_ID);
+        assertThat(itemParcel.txPower).isEqualTo(TX_POWER);
+    }
+
+    /* Verifies Happy Path FastPairDiscoveryItem. */
+    private static void ensureHappyPathAsExpected(FastPairDiscoveryItem item) {
+        assertThat(item.getActionUrl()).isEqualTo(ACTION_URL);
+        assertThat(item.getActionUrlType()).isEqualTo(ACTION_URL_TYPE);
+        assertThat(item.getAppName()).isEqualTo(APP_NAME);
+        assertThat(item.getAuthenticationPublicKeySecp256r1())
+                .isEqualTo(AUTHENTICATION_PUBLIC_KEY_SEC_P256R1);
+        assertThat(item.getDescription()).isEqualTo(DESCRIPTION);
+        assertThat(item.getDeviceName()).isEqualTo(DEVICE_NAME);
+        assertThat(item.getDisplayUrl()).isEqualTo(DISPLAY_URL);
+        assertThat(item.getFirstObservationTimestampMillis())
+                .isEqualTo(FIRST_OBSERVATION_TIMESTAMP_MILLIS);
+        assertThat(item.getIconFfeUrl()).isEqualTo(ICON_FIFE_URL);
+        assertThat(item.getIconPng()).isEqualTo(ICON_PNG);
+        assertThat(item.getId()).isEqualTo(ID);
+        assertThat(item.getLastObservationTimestampMillis())
+                .isEqualTo(LAST_OBSERVATION_TIMESTAMP_MILLIS);
+        assertThat(item.getMacAddress()).isEqualTo(MAC_ADDRESS);
+        assertThat(item.getPackageName()).isEqualTo(PACKAGE_NAME);
+        assertThat(item.getPendingAppInstallTimestampMillis())
+                .isEqualTo(PENDING_APP_INSTALL_TIMESTAMP_MILLIS);
+        assertThat(item.getRssi()).isEqualTo(RSSI);
+        assertThat(item.getState()).isEqualTo(STATE);
+        assertThat(item.getTitle()).isEqualTo(TITLE);
+        assertThat(item.getTriggerId()).isEqualTo(TRIGGER_ID);
+        assertThat(item.getTxPower()).isEqualTo(TX_POWER);
+    }
+
+    /* Verifies Happy Path EligibleAccountParcel[]. */
+    private static void ensureHappyPathAsExpected(FastPairEligibleAccountParcel[] accountsParcel) {
+        assertThat(accountsParcel).hasLength(ELIGIBLE_ACCOUNTS_NUM);
+
+        assertThat(accountsParcel[0].account).isEqualTo(ELIGIBLE_ACCOUNT_1);
+        assertThat(accountsParcel[0].optIn).isEqualTo(ELIGIBLE_ACCOUNT_1_OPT_IN);
+
+        assertThat(accountsParcel[1].account).isEqualTo(ELIGIBLE_ACCOUNT_2);
+        assertThat(accountsParcel[1].optIn).isEqualTo(ELIGIBLE_ACCOUNT_2_OPT_IN);
+    }
+}
diff --git a/nearby/tests/unit/src/android/nearby/FastPairDeviceTest.java b/nearby/tests/unit/src/android/nearby/FastPairDeviceTest.java
new file mode 100644
index 0000000..edda3c2
--- /dev/null
+++ b/nearby/tests/unit/src/android/nearby/FastPairDeviceTest.java
@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.os.Parcel;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class FastPairDeviceTest {
+    private static final String NAME = "name";
+    private static final byte[] DATA = new byte[] {0x01, 0x02};
+    private static final String MODEL_ID = "112233";
+    private static final int RSSI = -80;
+    private static final int TX_POWER = -10;
+    private static final String MAC_ADDRESS = "00:11:22:33:44:55";
+    private static List<Integer> sMediums = new ArrayList<Integer>(List.of(1));
+    private static FastPairDevice sDevice;
+
+
+    @Before
+    public void setup() {
+        sDevice = new FastPairDevice(NAME, sMediums, RSSI, TX_POWER, MODEL_ID, MAC_ADDRESS, DATA);
+    }
+
+    @Test
+    public void testParcelable() {
+        Parcel dest = Parcel.obtain();
+        sDevice.writeToParcel(dest, 0);
+        dest.setDataPosition(0);
+        FastPairDevice compareDevice = FastPairDevice.CREATOR.createFromParcel(dest);
+        assertThat(compareDevice.getName()).isEqualTo(NAME);
+        assertThat(compareDevice.getMediums()).isEqualTo(sMediums);
+        assertThat(compareDevice.getRssi()).isEqualTo(RSSI);
+        assertThat(compareDevice.getTxPower()).isEqualTo(TX_POWER);
+        assertThat(compareDevice.getModelId()).isEqualTo(MODEL_ID);
+        assertThat(compareDevice.getBluetoothAddress()).isEqualTo(MAC_ADDRESS);
+        assertThat(compareDevice.getData()).isEqualTo(DATA);
+        assertThat(compareDevice.equals(sDevice)).isTrue();
+        assertThat(compareDevice.hashCode()).isEqualTo(sDevice.hashCode());
+    }
+
+    @Test
+    public void describeContents() {
+        assertThat(sDevice.describeContents()).isEqualTo(0);
+    }
+
+    @Test
+    public void testToString() {
+        assertThat(sDevice.toString()).isEqualTo(
+                "FastPairDevice [name=name, medium={BLE} "
+                        + "rssi=-80 txPower=-10 "
+                        + "modelId=112233 bluetoothAddress=00:11:22:33:44:55]");
+    }
+
+    @Test
+    public void testCreatorNewArray() {
+        FastPairDevice[] fastPairDevices = FastPairDevice.CREATOR.newArray(2);
+        assertThat(fastPairDevices.length).isEqualTo(2);
+    }
+
+    @Test
+    public void testBuilder() {
+        FastPairDevice.Builder builder = new FastPairDevice.Builder();
+        FastPairDevice compareDevice = builder.setName(NAME)
+                .addMedium(1)
+                .setBluetoothAddress(MAC_ADDRESS)
+                .setRssi(RSSI)
+                .setTxPower(TX_POWER)
+                .setData(DATA)
+                .setModelId(MODEL_ID)
+                .build();
+        assertThat(compareDevice.getName()).isEqualTo(NAME);
+        assertThat(compareDevice.getMediums()).isEqualTo(sMediums);
+        assertThat(compareDevice.getRssi()).isEqualTo(RSSI);
+        assertThat(compareDevice.getTxPower()).isEqualTo(TX_POWER);
+        assertThat(compareDevice.getModelId()).isEqualTo(MODEL_ID);
+        assertThat(compareDevice.getBluetoothAddress()).isEqualTo(MAC_ADDRESS);
+        assertThat(compareDevice.getData()).isEqualTo(DATA);
+    }
+}
diff --git a/nearby/tests/unit/src/android/nearby/FastPairEligibleAccountTest.java b/nearby/tests/unit/src/android/nearby/FastPairEligibleAccountTest.java
new file mode 100644
index 0000000..da5a518
--- /dev/null
+++ b/nearby/tests/unit/src/android/nearby/FastPairEligibleAccountTest.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.accounts.Account;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+public class FastPairEligibleAccountTest {
+
+    private static final Account ACCOUNT = new Account("abc@google.com", "type1");
+    private static final Account ACCOUNT_NULL = null;
+
+    private static final boolean OPT_IN_TRUE = true;
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testSetGetFastPairEligibleAccountNotNull() {
+        FastPairEligibleAccount eligibleAccount =
+                genFastPairEligibleAccount(ACCOUNT, OPT_IN_TRUE);
+
+        assertThat(eligibleAccount.getAccount()).isEqualTo(ACCOUNT);
+        assertThat(eligibleAccount.isOptIn()).isEqualTo(OPT_IN_TRUE);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testSetGetFastPairEligibleAccountNull() {
+        FastPairEligibleAccount eligibleAccount =
+                genFastPairEligibleAccount(ACCOUNT_NULL, OPT_IN_TRUE);
+
+        assertThat(eligibleAccount.getAccount()).isEqualTo(ACCOUNT_NULL);
+        assertThat(eligibleAccount.isOptIn()).isEqualTo(OPT_IN_TRUE);
+    }
+
+    /* Generates FastPairEligibleAccount. */
+    private static FastPairEligibleAccount genFastPairEligibleAccount(
+            Account account, boolean optIn) {
+        FastPairEligibleAccount.Builder builder = new FastPairEligibleAccount.Builder();
+        builder.setAccount(account);
+        builder.setOptIn(optIn);
+
+        return builder.build();
+    }
+}
diff --git a/nearby/tests/unit/src/android/nearby/PairStatusMetadataTest.java b/nearby/tests/unit/src/android/nearby/PairStatusMetadataTest.java
new file mode 100644
index 0000000..7bc6519
--- /dev/null
+++ b/nearby/tests/unit/src/android/nearby/PairStatusMetadataTest.java
@@ -0,0 +1,105 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.os.Parcel;
+
+import org.junit.Test;
+
+public class PairStatusMetadataTest {
+    private static final int UNKNOWN = 1000;
+    private static final int SUCCESS = 1001;
+    private static final int FAIL = 1002;
+    private static final int DISMISS = 1003;
+
+    @Test
+    public void statusToString() {
+        assertThat(PairStatusMetadata.statusToString(UNKNOWN)).isEqualTo("UNKNOWN");
+        assertThat(PairStatusMetadata.statusToString(SUCCESS)).isEqualTo("SUCCESS");
+        assertThat(PairStatusMetadata.statusToString(FAIL)).isEqualTo("FAIL");
+        assertThat(PairStatusMetadata.statusToString(DISMISS)).isEqualTo("DISMISS");
+    }
+
+    @Test
+    public void getStatus() {
+        PairStatusMetadata pairStatusMetadata = new PairStatusMetadata(SUCCESS);
+        assertThat(pairStatusMetadata.getStatus()).isEqualTo(1001);
+        pairStatusMetadata = new PairStatusMetadata(FAIL);
+        assertThat(pairStatusMetadata.getStatus()).isEqualTo(1002);
+        pairStatusMetadata = new PairStatusMetadata(DISMISS);
+        assertThat(pairStatusMetadata.getStatus()).isEqualTo(1003);
+        pairStatusMetadata = new PairStatusMetadata(UNKNOWN);
+        assertThat(pairStatusMetadata.getStatus()).isEqualTo(1000);
+    }
+
+    @Test
+    public void testToString() {
+        PairStatusMetadata pairStatusMetadata = new PairStatusMetadata(SUCCESS);
+        assertThat(pairStatusMetadata.toString())
+                .isEqualTo("PairStatusMetadata[ status=SUCCESS]");
+        pairStatusMetadata = new PairStatusMetadata(FAIL);
+        assertThat(pairStatusMetadata.toString())
+                .isEqualTo("PairStatusMetadata[ status=FAIL]");
+        pairStatusMetadata = new PairStatusMetadata(DISMISS);
+        assertThat(pairStatusMetadata.toString())
+                .isEqualTo("PairStatusMetadata[ status=DISMISS]");
+        pairStatusMetadata = new PairStatusMetadata(UNKNOWN);
+        assertThat(pairStatusMetadata.toString())
+                .isEqualTo("PairStatusMetadata[ status=UNKNOWN]");
+    }
+
+    @Test
+    public void testEquals() {
+        PairStatusMetadata pairStatusMetadata = new PairStatusMetadata(SUCCESS);
+        PairStatusMetadata pairStatusMetadata1 = new PairStatusMetadata(SUCCESS);
+        PairStatusMetadata pairStatusMetadata2 = new PairStatusMetadata(UNKNOWN);
+        assertThat(pairStatusMetadata.equals(pairStatusMetadata1)).isTrue();
+        assertThat(pairStatusMetadata.equals(pairStatusMetadata2)).isFalse();
+        assertThat(pairStatusMetadata.hashCode()).isEqualTo(pairStatusMetadata1.hashCode());
+    }
+
+    @Test
+    public void testParcelable() {
+        PairStatusMetadata pairStatusMetadata = new PairStatusMetadata(SUCCESS);
+        Parcel dest = Parcel.obtain();
+        pairStatusMetadata.writeToParcel(dest, 0);
+        dest.setDataPosition(0);
+        PairStatusMetadata comparStatusMetadata =
+                PairStatusMetadata.CREATOR.createFromParcel(dest);
+        assertThat(pairStatusMetadata.equals(comparStatusMetadata)).isTrue();
+    }
+
+    @Test
+    public void testCreatorNewArray() {
+        PairStatusMetadata[] pairStatusMetadatas = PairStatusMetadata.CREATOR.newArray(2);
+        assertThat(pairStatusMetadatas.length).isEqualTo(2);
+    }
+
+    @Test
+    public void describeContents() {
+        PairStatusMetadata pairStatusMetadata = new PairStatusMetadata(SUCCESS);
+        assertThat(pairStatusMetadata.describeContents()).isEqualTo(0);
+    }
+
+    @Test
+    public void  getStability() {
+        PairStatusMetadata pairStatusMetadata = new PairStatusMetadata(SUCCESS);
+        assertThat(pairStatusMetadata.getStability()).isEqualTo(0);
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/ble/BleFilterTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/ble/BleFilterTest.java
index 1d3653b..c4a9729 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/common/ble/BleFilterTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/ble/BleFilterTest.java
@@ -20,7 +20,11 @@
 
 import static org.junit.Assert.fail;
 
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothAssignedNumbers;
 import android.bluetooth.BluetoothDevice;
+import android.bluetooth.le.ScanFilter;
+import android.os.Parcel;
 import android.os.ParcelUuid;
 import android.util.SparseArray;
 
@@ -44,6 +48,83 @@
     public static final ParcelUuid EDDYSTONE_SERVICE_DATA_PARCELUUID =
             ParcelUuid.fromString("0000FEAA-0000-1000-8000-00805F9B34FB");
 
+    private final BleFilter mEddystoneFilter = createEddystoneFilter();
+    private final BleFilter mEddystoneUidFilter = createEddystoneUidFilter();
+    private final BleFilter mEddystoneUrlFilter = createEddystoneUrlFilter();
+    private final BleFilter mEddystoneEidFilter = createEddystoneEidFilter();
+    private final BleFilter mIBeaconWithoutUuidFilter = createIBeaconWithoutUuidFilter();
+    private final BleFilter mIBeaconWithUuidFilter = createIBeaconWithUuidFilter();
+    private final BleFilter mChromecastFilter =
+            new BleFilter.Builder().setServiceUuid(
+                    new ParcelUuid(UUID.fromString("0000FEA0-0000-1000-8000-00805F9B34FB")))
+                    .build();
+    private final BleFilter mEddystoneWithDeviceNameFilter =
+            new BleFilter.Builder()
+                    .setServiceUuid(EDDYSTONE_SERVICE_DATA_PARCELUUID)
+                    .setDeviceName("BERT")
+                    .build();
+    private final BleFilter mEddystoneWithDeviceAddressFilter =
+            new BleFilter.Builder()
+                    .setServiceUuid(EDDYSTONE_SERVICE_DATA_PARCELUUID)
+                    .setDeviceAddress("00:11:22:33:AA:BB")
+                    .build();
+    private final BleFilter mServiceUuidWithMaskFilter1 =
+            new BleFilter.Builder()
+                    .setServiceUuid(
+                            new ParcelUuid(UUID.fromString("0000FEA0-0000-1000-8000-00805F9B34FB")),
+                            new ParcelUuid(UUID.fromString("0000000-0000-000-FFFF-FFFFFFFFFFFF")))
+                    .build();
+    private final BleFilter mServiceUuidWithMaskFilter2 =
+            new BleFilter.Builder()
+                    .setServiceUuid(
+                            new ParcelUuid(UUID.fromString("0000FEA0-0000-1000-8000-00805F9B34FB")),
+                            new ParcelUuid(UUID.fromString("FFFFFFF-FFFF-FFF-FFFF-FFFFFFFFFFFF")))
+                    .build();
+
+    private final BleFilter mSmartSetupFilter =
+            new BleFilter.Builder()
+                    .setManufacturerData(
+                            BluetoothAssignedNumbers.GOOGLE,
+                            new byte[] {0x00, 0x10},
+                            new byte[] {0x00, (byte) 0xFF})
+                    .build();
+    private final BleFilter mWearFilter =
+            new BleFilter.Builder()
+                    .setManufacturerData(
+                            BluetoothAssignedNumbers.GOOGLE,
+                            new byte[] {0x00, 0x00, 0x00},
+                            new byte[] {0x00, 0x00, (byte) 0xFF})
+                    .build();
+    private final BleFilter mFakeSmartSetupSubsetFilter =
+            new BleFilter.Builder()
+                    .setManufacturerData(
+                            BluetoothAssignedNumbers.GOOGLE,
+                            new byte[] {0x00, 0x10, 0x50},
+                            new byte[] {0x00, (byte) 0xFF, (byte) 0xFF})
+                    .build();
+    private final BleFilter mFakeSmartSetupNotSubsetFilter =
+            new BleFilter.Builder()
+                    .setManufacturerData(
+                            BluetoothAssignedNumbers.GOOGLE,
+                            new byte[] {0x00, 0x10, 0x50},
+                            new byte[] {0x00, (byte) 0x00, (byte) 0xFF})
+                    .build();
+
+    private final BleFilter mFakeFilter1 =
+            new BleFilter.Builder()
+                    .setServiceData(
+                            ParcelUuid.fromString("0000110B-0000-1000-8000-00805F9B34FB"),
+                            new byte[] {0x51, 0x64},
+                            new byte[] {0x00, (byte) 0xFF})
+                    .build();
+    private final BleFilter mFakeFilter2 =
+            new BleFilter.Builder()
+                    .setServiceData(
+                            ParcelUuid.fromString("0000110B-0000-1000-8000-00805F9B34FB"),
+                            new byte[] {0x51, 0x64, 0x34},
+                            new byte[] {0x00, (byte) 0xFF, (byte) 0xFF})
+                    .build();
+
     private ParcelUuid mServiceDataUuid;
     private BleSighting mBleSighting;
     private BleFilter.Builder mFilterBuilder;
@@ -229,6 +310,16 @@
     }
 
     @Test
+    public void serviceDataUuidNotInBleRecord() {
+        byte[] bleRecord = FastPairTestData.eir_1;
+        byte[] serviceData = {(byte) 0xe0, (byte) 0x00};
+
+        // Verify Service Data with 2-byte UUID, no data, and NOT in scan record
+        BleFilter filter = mFilterBuilder.setServiceData(mServiceDataUuid, serviceData).build();
+        assertThat(matches(filter, null, 0, bleRecord)).isFalse();
+    }
+
+    @Test
     public void serviceDataMask() {
         byte[] bleRecord = FastPairTestData.sd1;
         BleFilter filter;
@@ -263,6 +354,18 @@
         mFilterBuilder.setServiceData(mServiceDataUuid, serviceData, mask).build();
     }
 
+    @Test
+    public void serviceDataMaskNotInBleRecord() {
+        byte[] bleRecord = FastPairTestData.eir_1;
+        BleFilter filter;
+
+        // Verify matching partial manufacturer with data and mask
+        byte[] serviceData1 = {(byte) 0xe0, (byte) 0x00, (byte) 0x15};
+        byte[] mask1 = {(byte) 0xff, (byte) 0xff, (byte) 0xff};
+        filter = mFilterBuilder.setServiceData(mServiceDataUuid, serviceData1, mask1).build();
+        assertThat(matches(filter, null, 0, bleRecord)).isFalse();
+    }
+
 
     @Test
     public void deviceNameTest() {
@@ -280,12 +383,241 @@
         assertThat(matches(filter, null, 0, bleRecord)).isFalse();
     }
 
+    @Test
+    public void deviceNameNotInBleRecord() {
+        // Verify the name filter does not match
+        byte[] bleRecord = FastPairTestData.eir_1;
+        BleFilter filter = mFilterBuilder.setDeviceName("Pedometer").build();
+        assertThat(matches(filter, null, 0, bleRecord)).isFalse();
+    }
+
+    @Test
+    public void serviceUuid() {
+        byte[] bleRecord = FastPairTestData.eddystone_header_and_uuid;
+        ParcelUuid uuid = ParcelUuid.fromString("0000FEAA-0000-1000-8000-00805F9B34FB");
+
+        BleFilter filter = mFilterBuilder.setServiceUuid(uuid).build();
+        assertMatches(filter, null, 0, bleRecord);
+    }
+
+    @Test
+    public void serviceUuidNoMatch() {
+        // Verify the name filter does not match
+        byte[] bleRecord = FastPairTestData.eddystone_header_and_uuid;
+        ParcelUuid uuid = ParcelUuid.fromString("00001804-0000-1000-8000-000000000000");
+
+        BleFilter filter = mFilterBuilder.setServiceUuid(uuid).build();
+        assertThat(matches(filter, null, 0, bleRecord)).isFalse();
+    }
+
+    @Test
+    public void serviceUuidNotInBleRecord() {
+        // Verify the name filter does not match
+        byte[] bleRecord = FastPairTestData.eir_1;
+        ParcelUuid uuid = ParcelUuid.fromString("00001804-0000-1000-8000-000000000000");
+
+        BleFilter filter = mFilterBuilder.setServiceUuid(uuid).build();
+        assertThat(matches(filter, null, 0, bleRecord)).isFalse();
+    }
+
+    @Test
+    public void serviceUuidMask() {
+        byte[] bleRecord = FastPairTestData.eddystone_header_and_uuid;
+        ParcelUuid uuid = ParcelUuid.fromString("0000FEAA-0000-1000-8000-00805F9B34FB");
+        ParcelUuid mask = ParcelUuid.fromString("00000000-0000-0000-0000-FFFFFFFFFFFF");
+        BleFilter filter = mFilterBuilder.setServiceUuid(uuid, mask).build();
+        assertMatches(filter, null, 0, bleRecord);
+    }
+
+
+    @Test
+    public void macAddress() {
+        byte[] bleRecord = FastPairTestData.eddystone_header_and_uuid;
+        String macAddress = "00:11:22:33:AA:BB";
+        BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
+
+        BluetoothDevice device = adapter.getRemoteDevice(macAddress);
+        BleFilter filter = mFilterBuilder.setDeviceAddress(macAddress).build();
+        assertMatches(filter, device, 0, bleRecord);
+    }
+
+    @Test
+    public void macAddressNoMatch() {
+        byte[] bleRecord = FastPairTestData.eddystone_header_and_uuid;
+        String macAddress = "00:11:22:33:AA:00";
+        BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
+
+        BluetoothDevice device = adapter.getRemoteDevice("00:11:22:33:AA:BB");
+        BleFilter filter = mFilterBuilder.setDeviceAddress(macAddress).build();
+        assertThat(matches(filter, device, 0, bleRecord)).isFalse();
+    }
+
+    @Test
+    public void eddystoneIsSuperset() {
+        // Verify eddystone subtypes pass.
+        assertThat(mEddystoneFilter.isSuperset(mEddystoneFilter)).isTrue();
+        assertThat(mEddystoneUidFilter.isSuperset(mEddystoneUidFilter)).isTrue();
+        assertThat(mEddystoneFilter.isSuperset(mEddystoneUidFilter)).isTrue();
+        assertThat(mEddystoneFilter.isSuperset(mEddystoneEidFilter)).isTrue();
+        assertThat(mEddystoneFilter.isSuperset(mEddystoneUrlFilter)).isTrue();
+
+        // Non-eddystone beacon filters should never be supersets.
+        assertThat(mEddystoneFilter.isSuperset(mIBeaconWithoutUuidFilter)).isFalse();
+        assertThat(mEddystoneFilter.isSuperset(mWearFilter)).isFalse();
+        assertThat(mEddystoneFilter.isSuperset(mSmartSetupFilter)).isFalse();
+        assertThat(mEddystoneFilter.isSuperset(mChromecastFilter)).isFalse();
+        assertThat(mEddystoneFilter.isSuperset(mFakeFilter1)).isFalse();
+        assertThat(mEddystoneFilter.isSuperset(mFakeFilter2)).isFalse();
+
+        assertThat(mEddystoneUidFilter.isSuperset(mWearFilter)).isFalse();
+        assertThat(mEddystoneUidFilter.isSuperset(mSmartSetupFilter)).isFalse();
+        assertThat(mEddystoneUidFilter.isSuperset(mChromecastFilter)).isFalse();
+        assertThat(mEddystoneUidFilter.isSuperset(mFakeFilter1)).isFalse();
+        assertThat(mEddystoneUidFilter.isSuperset(mFakeFilter2)).isFalse();
+    }
+
+    @Test
+    public void iBeaconIsSuperset() {
+        // Verify that an iBeacon filter is a superset of itself and any filters that specify UUIDs.
+        assertThat(mIBeaconWithoutUuidFilter.isSuperset(mIBeaconWithoutUuidFilter)).isTrue();
+        assertThat(mIBeaconWithoutUuidFilter.isSuperset(mIBeaconWithUuidFilter)).isTrue();
+
+        // Non-iBeacon filters should never be supersets.
+        assertThat(mIBeaconWithoutUuidFilter.isSuperset(mEddystoneEidFilter)).isFalse();
+        assertThat(mIBeaconWithoutUuidFilter.isSuperset(mEddystoneUrlFilter)).isFalse();
+        assertThat(mIBeaconWithoutUuidFilter.isSuperset(mEddystoneUidFilter)).isFalse();
+        assertThat(mIBeaconWithoutUuidFilter.isSuperset(mWearFilter)).isFalse();
+        assertThat(mIBeaconWithoutUuidFilter.isSuperset(mSmartSetupFilter)).isFalse();
+        assertThat(mIBeaconWithoutUuidFilter.isSuperset(mChromecastFilter)).isFalse();
+        assertThat(mIBeaconWithoutUuidFilter.isSuperset(mFakeFilter1)).isFalse();
+        assertThat(mIBeaconWithoutUuidFilter.isSuperset(mFakeFilter2)).isFalse();
+    }
+
+    @Test
+    public void mixedFilterIsSuperset() {
+        // Compare service data vs manufacturer data filters to verify we detect supersets
+        // correctly in filters that aren't for iBeacon and Eddystone.
+        assertThat(mWearFilter.isSuperset(mIBeaconWithoutUuidFilter)).isFalse();
+        assertThat(mSmartSetupFilter.isSuperset(mIBeaconWithoutUuidFilter)).isFalse();
+        assertThat(mChromecastFilter.isSuperset(mIBeaconWithoutUuidFilter)).isFalse();
+
+        assertThat(mWearFilter.isSuperset(mEddystoneFilter)).isFalse();
+        assertThat(mSmartSetupFilter.isSuperset(mEddystoneFilter)).isFalse();
+        assertThat(mChromecastFilter.isSuperset(mEddystoneFilter)).isFalse();
+
+        assertThat(mWearFilter.isSuperset(mEddystoneUidFilter)).isFalse();
+        assertThat(mSmartSetupFilter.isSuperset(mEddystoneUidFilter)).isFalse();
+        assertThat(mChromecastFilter.isSuperset(mEddystoneUidFilter)).isFalse();
+
+        assertThat(mWearFilter.isSuperset(mEddystoneEidFilter)).isFalse();
+        assertThat(mSmartSetupFilter.isSuperset(mEddystoneEidFilter)).isFalse();
+        assertThat(mChromecastFilter.isSuperset(mEddystoneEidFilter)).isFalse();
+
+        assertThat(mWearFilter.isSuperset(mEddystoneUrlFilter)).isFalse();
+        assertThat(mSmartSetupFilter.isSuperset(mEddystoneUrlFilter)).isFalse();
+        assertThat(mChromecastFilter.isSuperset(mEddystoneUrlFilter)).isFalse();
+
+        assertThat(mWearFilter.isSuperset(mIBeaconWithUuidFilter)).isFalse();
+        assertThat(mSmartSetupFilter.isSuperset(mIBeaconWithUuidFilter)).isFalse();
+        assertThat(mChromecastFilter.isSuperset(mIBeaconWithUuidFilter)).isFalse();
+
+        assertThat(mWearFilter.isSuperset(mChromecastFilter)).isFalse();
+        assertThat(mSmartSetupFilter.isSuperset(mChromecastFilter)).isFalse();
+        assertThat(mSmartSetupFilter.isSuperset(mWearFilter)).isFalse();
+        assertThat(mChromecastFilter.isSuperset(mWearFilter)).isFalse();
+
+        assertThat(mFakeFilter1.isSuperset(mFakeFilter2)).isTrue();
+        assertThat(mFakeFilter2.isSuperset(mFakeFilter1)).isFalse();
+        assertThat(mSmartSetupFilter.isSuperset(mFakeSmartSetupSubsetFilter)).isTrue();
+        assertThat(mSmartSetupFilter.isSuperset(mFakeSmartSetupNotSubsetFilter)).isFalse();
+
+        assertThat(mEddystoneFilter.isSuperset(mEddystoneWithDeviceNameFilter)).isTrue();
+        assertThat(mEddystoneFilter.isSuperset(mEddystoneWithDeviceAddressFilter)).isTrue();
+        assertThat(mEddystoneWithDeviceAddressFilter.isSuperset(mEddystoneFilter)).isFalse();
+
+        assertThat(mChromecastFilter.isSuperset(mServiceUuidWithMaskFilter1)).isTrue();
+        assertThat(mServiceUuidWithMaskFilter2.isSuperset(mServiceUuidWithMaskFilter1)).isFalse();
+        assertThat(mServiceUuidWithMaskFilter1.isSuperset(mServiceUuidWithMaskFilter2)).isTrue();
+        assertThat(mEddystoneFilter.isSuperset(mServiceUuidWithMaskFilter1)).isFalse();
+    }
+
+    @Test
+    public void toOsFilter_getTheSameFilterParameter() {
+        BleFilter nearbyFilter = createTestFilter();
+        ScanFilter osFilter = nearbyFilter.toOsFilter();
+        assertFilterValuesEqual(nearbyFilter, osFilter);
+    }
+
+    @Test
+    public void describeContents() {
+        BleFilter nearbyFilter = createTestFilter();
+        assertThat(nearbyFilter.describeContents()).isEqualTo(0);
+    }
+
+    @Test
+    public void testHashCode() {
+        BleFilter nearbyFilter = createTestFilter();
+        BleFilter compareFilter = new BleFilter("BERT", "00:11:22:33:AA:BB",
+                new ParcelUuid(UUID.fromString("0000FEA0-0000-1000-8000-00805F9B34FB")),
+                new ParcelUuid(UUID.fromString("FFFFFFF-FFFF-FFF-FFFF-FFFFFFFFFFFF")),
+                ParcelUuid.fromString("0000110B-0000-1000-8000-00805F9B34FB"),
+                new byte[] {0x51, 0x64}, new byte[] {0x00, (byte) 0xFF},
+                BluetoothAssignedNumbers.GOOGLE, new byte[] {0x00, 0x10},
+                new byte[] {0x00, (byte) 0xFF});
+        assertThat(nearbyFilter.hashCode()).isEqualTo(compareFilter.hashCode());
+    }
+
+    @Test
+    public void testToString() {
+        BleFilter nearbyFilter = createTestFilter();
+        assertThat(nearbyFilter.toString()).isEqualTo("BleFilter [deviceName=BERT,"
+                + " deviceAddress=00:11:22:33:AA:BB, uuid=0000fea0-0000-1000-8000-00805f9b34fb,"
+                + " uuidMask=0fffffff-ffff-0fff-ffff-ffffffffffff,"
+                + " serviceDataUuid=0000110b-0000-1000-8000-00805f9b34fb,"
+                + " serviceData=[81, 100], serviceDataMask=[0, -1],"
+                + " manufacturerId=224, manufacturerData=[0, 16], manufacturerDataMask=[0, -1]]");
+    }
+
+    @Test
+    public void testParcel() {
+        BleFilter nearbyFilter = createTestFilter();
+        Parcel parcel = Parcel.obtain();
+        nearbyFilter.writeToParcel(parcel, 0);
+        parcel.setDataPosition(0);
+        BleFilter compareFilter = BleFilter.CREATOR.createFromParcel(
+                parcel);
+        parcel.recycle();
+        assertThat(compareFilter.getDeviceName()).isEqualTo("BERT");
+    }
+
+    @Test
+    public void testCreatorNewArray() {
+        BleFilter[] nearbyFilters  = BleFilter.CREATOR.newArray(2);
+        assertThat(nearbyFilters.length).isEqualTo(2);
+    }
+
     private static boolean matches(
             BleFilter filter, BluetoothDevice device, int rssi, byte[] bleRecord) {
         return filter.matches(new BleSighting(device,
                 bleRecord, rssi, 0 /* timestampNanos */));
     }
 
+    private static void assertFilterValuesEqual(BleFilter nearbyFilter, ScanFilter osFilter) {
+        assertThat(osFilter.getDeviceAddress()).isEqualTo(nearbyFilter.getDeviceAddress());
+        assertThat(osFilter.getDeviceName()).isEqualTo(nearbyFilter.getDeviceName());
+
+        assertThat(osFilter.getManufacturerData()).isEqualTo(nearbyFilter.getManufacturerData());
+        assertThat(osFilter.getManufacturerDataMask())
+                .isEqualTo(nearbyFilter.getManufacturerDataMask());
+        assertThat(osFilter.getManufacturerId()).isEqualTo(nearbyFilter.getManufacturerId());
+
+        assertThat(osFilter.getServiceData()).isEqualTo(nearbyFilter.getServiceData());
+        assertThat(osFilter.getServiceDataMask()).isEqualTo(nearbyFilter.getServiceDataMask());
+        assertThat(osFilter.getServiceDataUuid()).isEqualTo(nearbyFilter.getServiceDataUuid());
+
+        assertThat(osFilter.getServiceUuid()).isEqualTo(nearbyFilter.getServiceUuid());
+        assertThat(osFilter.getServiceUuidMask()).isEqualTo(nearbyFilter.getServiceUuidMask());
+    }
 
     private static void assertMatches(
             BleFilter filter, BluetoothDevice device, int rssi, byte[] bleRecordBytes) {
@@ -325,10 +657,10 @@
 
         // UUID match.
         if (filter.getServiceUuid() != null
-                && !matchesServiceUuids(filter.getServiceUuid(), filter.getServiceUuidMask(),
-                bleRecord.getServiceUuids())) {
-            fail("The filter specifies a service UUID but it doesn't match "
-                    + "what's in the scan record");
+                && !matchesServiceUuids(filter.getServiceUuid(),
+                filter.getServiceUuidMask(), bleRecord.getServiceUuids())) {
+            fail("The filter specifies a service UUID "
+                    + "but it doesn't match what's in the scan record");
         }
 
         // Service data match
@@ -401,6 +733,95 @@
         }
     }
 
+    private static String byteString(Map<ParcelUuid, byte[]> bytesMap) {
+        StringBuilder builder = new StringBuilder();
+        for (Map.Entry<ParcelUuid, byte[]> entry : bytesMap.entrySet()) {
+            builder.append(builder.toString().isEmpty() ? "  " : "\n  ");
+            builder.append(entry.getKey().toString());
+            builder.append(" --> ");
+            builder.append(byteString(entry.getValue()));
+        }
+        return builder.toString();
+    }
+
+    private static String byteString(SparseArray<byte[]> bytesArray) {
+        StringBuilder builder = new StringBuilder();
+        for (int i = 0; i < bytesArray.size(); i++) {
+            builder.append(builder.toString().isEmpty() ? "  " : "\n  ");
+            builder.append(byteString(bytesArray.valueAt(i)));
+        }
+        return builder.toString();
+    }
+
+    private static BleFilter createTestFilter() {
+        BleFilter.Builder builder = new BleFilter.Builder();
+        builder
+                .setServiceUuid(
+                        new ParcelUuid(UUID.fromString("0000FEA0-0000-1000-8000-00805F9B34FB")),
+                        new ParcelUuid(UUID.fromString("FFFFFFF-FFFF-FFF-FFFF-FFFFFFFFFFFF")))
+                .setDeviceAddress("00:11:22:33:AA:BB")
+                .setDeviceName("BERT")
+                .setManufacturerData(
+                        BluetoothAssignedNumbers.GOOGLE,
+                        new byte[] {0x00, 0x10},
+                        new byte[] {0x00, (byte) 0xFF})
+                .setServiceData(
+                        ParcelUuid.fromString("0000110B-0000-1000-8000-00805F9B34FB"),
+                        new byte[] {0x51, 0x64},
+                        new byte[] {0x00, (byte) 0xFF});
+        return builder.build();
+    }
+
+    // ref to beacon.decode.BeaconFilterBuilder.eddystoneFilter()
+    private static BleFilter createEddystoneFilter() {
+        return new BleFilter.Builder().setServiceUuid(EDDYSTONE_SERVICE_DATA_PARCELUUID).build();
+    }
+    // ref to beacon.decode.BeaconFilterBuilder.eddystoneUidFilter()
+    private static BleFilter createEddystoneUidFilter() {
+        return new BleFilter.Builder()
+                .setServiceUuid(EDDYSTONE_SERVICE_DATA_PARCELUUID)
+                .setServiceData(
+                        EDDYSTONE_SERVICE_DATA_PARCELUUID, new byte[] {(short) 0x00},
+                        new byte[] {(byte) 0xf0})
+                .build();
+    }
+
+    // ref to beacon.decode.BeaconFilterBuilder.eddystoneUrlFilter()
+    private static BleFilter createEddystoneUrlFilter() {
+        return new BleFilter.Builder()
+                .setServiceUuid(EDDYSTONE_SERVICE_DATA_PARCELUUID)
+                .setServiceData(
+                        EDDYSTONE_SERVICE_DATA_PARCELUUID,
+                        new byte[] {(short) 0x10}, new byte[] {(byte) 0xf0})
+                .build();
+    }
+
+    // ref to beacon.decode.BeaconFilterBuilder.eddystoneEidFilter()
+    private static BleFilter createEddystoneEidFilter() {
+        return new BleFilter.Builder()
+                .setServiceUuid(EDDYSTONE_SERVICE_DATA_PARCELUUID)
+                .setServiceData(
+                        EDDYSTONE_SERVICE_DATA_PARCELUUID,
+                        new byte[] {(short) 0x30}, new byte[] {(byte) 0xf0})
+                .build();
+    }
+
+    // ref to beacon.decode.BeaconFilterBuilder.iBeaconWithoutUuidFilter()
+    private static BleFilter createIBeaconWithoutUuidFilter() {
+        byte[] data = {(byte) 0x02, (byte) 0x15};
+        byte[] mask = {(byte) 0xff, (byte) 0xff};
+
+        return new BleFilter.Builder().setManufacturerData((short) 0x004C, data, mask).build();
+    }
+
+    // ref to beacon.decode.BeaconFilterBuilder.iBeaconWithUuidFilter()
+    private static BleFilter createIBeaconWithUuidFilter() {
+        byte[] data = getFilterData(ParcelUuid.fromString("0000FEAA-0000-1000-8000-00805F9B34FB"));
+        byte[] mask = getFilterMask(ParcelUuid.fromString("0000FEAA-0000-1000-8000-00805F9B34FB"));
+
+        return new BleFilter.Builder().setManufacturerData((short) 0x004C, data, mask).build();
+    }
+
     // Ref to beacon.decode.AppleBeaconDecoder.getFilterData
     private static byte[] getFilterData(ParcelUuid uuid) {
         byte[] data = new byte[18];
@@ -418,6 +839,20 @@
         return data;
     }
 
+    // Ref to beacon.decode.AppleBeaconDecoder.getFilterMask
+    private static byte[] getFilterMask(ParcelUuid uuid) {
+        byte[] mask = new byte[18];
+        mask[0] = (byte) 0xff;
+        mask[1] = (byte) 0xff;
+        // Check if UUID is needed in data
+        if (uuid != null) {
+            for (int i = 0; i < 16; i++) {
+                mask[i + 2] = (byte) 0xff;
+            }
+        }
+        return mask;
+    }
+
     // Ref to beacon.decode.AppleBeaconDecoder.uuidToByteArray
     private static byte[] uuidToByteArray(ParcelUuid uuid) {
         ByteBuffer bb = ByteBuffer.wrap(new byte[16]);
@@ -453,24 +888,4 @@
         return ((uuid.getMostSignificantBits() & mask.getMostSignificantBits())
                 == (data.getMostSignificantBits() & mask.getMostSignificantBits()));
     }
-
-    private static String byteString(Map<ParcelUuid, byte[]> bytesMap) {
-        StringBuilder builder = new StringBuilder();
-        for (Map.Entry<ParcelUuid, byte[]> entry : bytesMap.entrySet()) {
-            builder.append(builder.toString().isEmpty() ? "  " : "\n  ");
-            builder.append(entry.getKey().toString());
-            builder.append(" --> ");
-            builder.append(byteString(entry.getValue()));
-        }
-        return builder.toString();
-    }
-
-    private static String byteString(SparseArray<byte[]> bytesArray) {
-        StringBuilder builder = new StringBuilder();
-        for (int i = 0; i < bytesArray.size(); i++) {
-            builder.append(builder.toString().isEmpty() ? "  " : "\n  ");
-            builder.append(byteString(bytesArray.valueAt(i)));
-        }
-        return builder.toString();
-    }
 }
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/ble/BleRecordTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/ble/BleRecordTest.java
index 5da98e2..3f9a259 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/common/ble/BleRecordTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/ble/BleRecordTest.java
@@ -34,6 +34,9 @@
 
 import static com.google.common.truth.Truth.assertThat;
 
+import android.os.ParcelUuid;
+import android.util.SparseArray;
+
 import androidx.test.filters.SdkSuppress;
 
 import org.junit.Test;
@@ -238,7 +241,6 @@
         BleRecord record = BleRecord.parseFromBytes(BEACON);
         BleRecord record2 = BleRecord.parseFromBytes(SAME_BEACON);
 
-
         assertThat(record).isEqualTo(record2);
 
         // Different items.
@@ -246,5 +248,48 @@
         assertThat(record).isNotEqualTo(record2);
         assertThat(record.hashCode()).isNotEqualTo(record2.hashCode());
     }
+
+    @Test
+    public void testFields() {
+        BleRecord record = BleRecord.parseFromBytes(BEACON);
+        assertThat(byteString(record.getManufacturerSpecificData()))
+                .isEqualTo("  0215F7826DA64FA24E988024BC5B71E0893E44D02522B3");
+        assertThat(
+                byteString(record.getServiceData(
+                        ParcelUuid.fromString("000000E0-0000-1000-8000-00805F9B34FB"))))
+                .isEqualTo("[null]");
+        assertThat(record.getTxPowerLevel()).isEqualTo(-12);
+        assertThat(record.toString()).isEqualTo(
+                "BleRecord [advertiseFlags=6, serviceUuids=[], "
+                        + "manufacturerSpecificData={76=[2, 21, -9, -126, 109, -90, 79, -94, 78,"
+                        + " -104, -128, 36, -68, 91, 113, -32, -119, 62, 68, -48, 37, 34, -77]},"
+                        + " serviceData={0000d00d-0000-1000-8000-00805f9b34fb"
+                        + "=[116, 109, 77, 107, 50, 54, 100]},"
+                        + " txPowerLevel=-12, deviceName=Kontakt]");
+    }
+
+    private static String byteString(SparseArray<byte[]> bytesArray) {
+        StringBuilder builder = new StringBuilder();
+        for (int i = 0; i < bytesArray.size(); i++) {
+            builder.append(builder.toString().isEmpty() ? "  " : "\n  ");
+            builder.append(byteString(bytesArray.valueAt(i)));
+        }
+        return builder.toString();
+    }
+
+    private static String byteString(byte[] bytes) {
+        if (bytes == null) {
+            return "[null]";
+        } else {
+            final char[] hexArray = "0123456789ABCDEF".toCharArray();
+            char[] hexChars = new char[bytes.length * 2];
+            for (int i = 0; i < bytes.length; i++) {
+                int v = bytes[i] & 0xFF;
+                hexChars[i * 2] = hexArray[v >>> 4];
+                hexChars[i * 2 + 1] = hexArray[v & 0x0F];
+            }
+            return new String(hexChars);
+        }
+    }
 }
 
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/ble/BleSightingTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/ble/BleSightingTest.java
new file mode 100644
index 0000000..d259851
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/ble/BleSightingTest.java
@@ -0,0 +1,155 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.ble;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
+
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothDevice;
+import android.os.Parcel;
+
+import org.junit.Test;
+
+import java.util.concurrent.TimeUnit;
+
+/** Test for Bluetooth LE {@link BleSighting}. */
+public class BleSightingTest {
+    private static final String DEVICE_NAME = "device1";
+    private static final String OTHER_DEVICE_NAME = "device2";
+    private static final long TIME_EPOCH_MILLIS = 123456;
+    private static final long OTHER_TIME_EPOCH_MILLIS = 456789;
+    private static final int RSSI = 1;
+    private static final int OTHER_RSSI = 2;
+
+    private final BluetoothDevice mBluetoothDevice1 =
+            BluetoothAdapter.getDefaultAdapter().getRemoteDevice("00:11:22:33:44:55");
+    private final BluetoothDevice mBluetoothDevice2 =
+            BluetoothAdapter.getDefaultAdapter().getRemoteDevice("AA:BB:CC:DD:EE:FF");
+
+
+    @Test
+    public void testEquals() {
+        BleSighting sighting =
+                buildBleSighting(mBluetoothDevice1, DEVICE_NAME, TIME_EPOCH_MILLIS, RSSI);
+        BleSighting sighting2 =
+                buildBleSighting(mBluetoothDevice1, DEVICE_NAME, TIME_EPOCH_MILLIS, RSSI);
+        assertThat(sighting.equals(sighting2)).isTrue();
+        assertThat(sighting2.equals(sighting)).isTrue();
+        assertThat(sighting.hashCode()).isEqualTo(sighting2.hashCode());
+
+        // Transitive property.
+        BleSighting sighting3 =
+                buildBleSighting(mBluetoothDevice1, DEVICE_NAME, TIME_EPOCH_MILLIS, RSSI);
+        assertThat(sighting2.equals(sighting3)).isTrue();
+        assertThat(sighting.equals(sighting3)).isTrue();
+
+        // Set different values for each field, one at a time.
+        sighting2 = buildBleSighting(mBluetoothDevice2, DEVICE_NAME, TIME_EPOCH_MILLIS, RSSI);
+        assertSightingsNotEquals(sighting, sighting2);
+
+        sighting2 = buildBleSighting(mBluetoothDevice1, OTHER_DEVICE_NAME, TIME_EPOCH_MILLIS, RSSI);
+        assertSightingsNotEquals(sighting, sighting2);
+
+        sighting2 = buildBleSighting(mBluetoothDevice1, DEVICE_NAME, OTHER_TIME_EPOCH_MILLIS, RSSI);
+        assertSightingsNotEquals(sighting, sighting2);
+
+        sighting2 = buildBleSighting(mBluetoothDevice1, DEVICE_NAME, TIME_EPOCH_MILLIS, OTHER_RSSI);
+        assertSightingsNotEquals(sighting, sighting2);
+    }
+
+    @Test
+    public void getNormalizedRSSI_usingNearbyRssiOffset_getCorrectValue() {
+        BleSighting sighting =
+                buildBleSighting(mBluetoothDevice1, DEVICE_NAME, TIME_EPOCH_MILLIS, RSSI);
+
+        int defaultRssiOffset = 3;
+        assertThat(sighting.getNormalizedRSSI()).isEqualTo(RSSI + defaultRssiOffset);
+    }
+
+    @Test
+    public void testFields() {
+        BleSighting sighting =
+                buildBleSighting(mBluetoothDevice1, DEVICE_NAME, TIME_EPOCH_MILLIS, RSSI);
+        assertThat(byteString(sighting.getBleRecordBytes()))
+                .isEqualTo("080964657669636531");
+        assertThat(sighting.getRssi()).isEqualTo(RSSI);
+        assertThat(sighting.getTimestampMillis()).isEqualTo(TIME_EPOCH_MILLIS);
+        assertThat(sighting.getTimestampNanos())
+                .isEqualTo(TimeUnit.MILLISECONDS.toNanos(TIME_EPOCH_MILLIS));
+        assertThat(sighting.toString()).isEqualTo(
+                "BleSighting{device=00:11:22:33:44:55,"
+                        + " bleRecord=BleRecord [advertiseFlags=-1,"
+                        + " serviceUuids=[],"
+                        + " manufacturerSpecificData={}, serviceData={},"
+                        + " txPowerLevel=-2147483648,"
+                        + " deviceName=device1],"
+                        + " rssi=1,"
+                        + " timestampNanos=123456000000}");
+    }
+
+    @Test
+    public void testParcelable() {
+        BleSighting sighting =
+                buildBleSighting(mBluetoothDevice1, DEVICE_NAME, TIME_EPOCH_MILLIS, RSSI);
+        Parcel dest = Parcel.obtain();
+        sighting.writeToParcel(dest, 0);
+        dest.setDataPosition(0);
+        assertThat(sighting.getRssi()).isEqualTo(RSSI);
+    }
+
+    @Test
+    public void testCreatorNewArray() {
+        BleSighting[]  sightings =
+                BleSighting.CREATOR.newArray(2);
+        assertThat(sightings.length).isEqualTo(2);
+    }
+
+    private static String byteString(byte[] bytes) {
+        if (bytes == null) {
+            return "[null]";
+        } else {
+            final char[] hexArray = "0123456789ABCDEF".toCharArray();
+            char[] hexChars = new char[bytes.length * 2];
+            for (int i = 0; i < bytes.length; i++) {
+                int v = bytes[i] & 0xFF;
+                hexChars[i * 2] = hexArray[v >>> 4];
+                hexChars[i * 2 + 1] = hexArray[v & 0x0F];
+            }
+            return new String(hexChars);
+        }
+    }
+
+        /** Builds a BleSighting instance which will correctly match filters by device name. */
+    private static BleSighting buildBleSighting(
+            BluetoothDevice bluetoothDevice, String deviceName, long timeEpochMillis, int rssi) {
+        byte[] nameBytes = deviceName.getBytes(UTF_8);
+        byte[] bleRecordBytes = new byte[nameBytes.length + 2];
+        bleRecordBytes[0] = (byte) (nameBytes.length + 1);
+        bleRecordBytes[1] = 0x09; // Value of private BleRecord.DATA_TYPE_LOCAL_NAME_COMPLETE;
+        System.arraycopy(nameBytes, 0, bleRecordBytes, 2, nameBytes.length);
+
+        return new BleSighting(bluetoothDevice, bleRecordBytes,
+                rssi, TimeUnit.MILLISECONDS.toNanos(timeEpochMillis));
+    }
+
+    private static void assertSightingsNotEquals(BleSighting sighting1, BleSighting sighting2) {
+        assertThat(sighting1.equals(sighting2)).isFalse();
+        assertThat(sighting1.hashCode()).isNotEqualTo(sighting2.hashCode());
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/ble/decode/BeaconDecoderTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/ble/decode/BeaconDecoderTest.java
new file mode 100644
index 0000000..9a9181d
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/ble/decode/BeaconDecoderTest.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.ble.decode;
+
+import static com.android.server.nearby.common.ble.BleRecord.parseFromBytes;
+import static com.android.server.nearby.common.ble.testing.FastPairTestData.getFastPairRecord;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import org.junit.Test;
+
+public class BeaconDecoderTest {
+    private BeaconDecoder mBeaconDecoder = new FastPairDecoder();;
+
+    @Test
+    public void testFields() {
+        assertThat(mBeaconDecoder.getTelemetry(parseFromBytes(getFastPairRecord()))).isNull();
+        assertThat(mBeaconDecoder.getUrl(parseFromBytes(getFastPairRecord()))).isNull();
+        assertThat(mBeaconDecoder.supportsBeaconIdAndTxPower(parseFromBytes(getFastPairRecord())))
+                .isTrue();
+        assertThat(mBeaconDecoder.supportsTxPower()).isTrue();
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/ble/decode/FastPairDecoderTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/ble/decode/FastPairDecoderTest.java
index 1ad04f8..6552699 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/common/ble/decode/FastPairDecoderTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/ble/decode/FastPairDecoderTest.java
@@ -17,15 +17,23 @@
 package com.android.server.nearby.common.ble.decode;
 
 import static com.android.server.nearby.common.ble.BleRecord.parseFromBytes;
+import static com.android.server.nearby.common.ble.testing.FastPairTestData.DEVICE_ADDRESS;
 import static com.android.server.nearby.common.ble.testing.FastPairTestData.FAST_PAIR_MODEL_ID;
+import static com.android.server.nearby.common.ble.testing.FastPairTestData.FAST_PAIR_SHARED_ACCOUNT_KEY_RECORD;
+import static com.android.server.nearby.common.ble.testing.FastPairTestData.RSSI;
 import static com.android.server.nearby.common.ble.testing.FastPairTestData.getFastPairRecord;
 import static com.android.server.nearby.common.ble.testing.FastPairTestData.newFastPairRecord;
 
 import static com.google.common.truth.Truth.assertThat;
 
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothDevice;
+
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 
 import com.android.server.nearby.common.ble.BleRecord;
+import com.android.server.nearby.common.ble.BleSighting;
+import com.android.server.nearby.common.ble.testing.FastPairTestData;
 import com.android.server.nearby.util.Hex;
 
 import com.google.common.primitives.Bytes;
@@ -34,12 +42,13 @@
 import org.junit.runner.RunWith;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
+import java.util.concurrent.TimeUnit;
 
 @RunWith(AndroidJUnit4.class)
 public class FastPairDecoderTest {
     private static final String LONG_MODEL_ID = "1122334455667788";
-    private final FastPairDecoder mDecoder = new FastPairDecoder();
     // Bits 3-6 are model ID length bits = 0b1000 = 8
     private static final byte LONG_MODEL_ID_HEADER = 0b00010000;
     private static final String PADDED_LONG_MODEL_ID = "00001111";
@@ -49,74 +58,239 @@
     private static final byte MODEL_ID_HEADER = 0b00000110;
     private static final String MODEL_ID = "112233";
     private static final byte BLOOM_FILTER_HEADER = 0b01100000;
+    private static final byte BLOOM_FILTER_NO_NOTIFICATION_HEADER = 0b01100010;
     private static final String BLOOM_FILTER = "112233445566";
+    private static final byte LONG_BLOOM_FILTER_HEADER = (byte) 0b10100000;
+    private static final String LONG_BLOOM_FILTER = "00112233445566778899";
     private static final byte BLOOM_FILTER_SALT_HEADER = 0b00010001;
     private static final String BLOOM_FILTER_SALT = "01";
+    private static final byte BATTERY_HEADER = 0b00110011;
+    private static final byte BATTERY_NO_NOTIFICATION_HEADER = 0b00110100;
+    private static final String BATTERY = "01048F";
     private static final byte RANDOM_RESOLVABLE_DATA_HEADER = 0b01000110;
     private static final String RANDOM_RESOLVABLE_DATA = "11223344";
-    private static final byte BLOOM_FILTER_NO_NOTIFICATION_HEADER = 0b01100010;
 
+    private final FastPairDecoder mDecoder = new FastPairDecoder();
+    private final BluetoothDevice mBluetoothDevice =
+            BluetoothAdapter.getDefaultAdapter().getRemoteDevice(DEVICE_ADDRESS);
+
+    @Test
+    public void filter() {
+        assertThat(FastPairDecoder.FILTER.matches(bleSighting(getFastPairRecord()))).isTrue();
+        assertThat(FastPairDecoder.FILTER.matches(bleSighting(FAST_PAIR_SHARED_ACCOUNT_KEY_RECORD)))
+                .isTrue();
+
+        // Any ID is a valid frame.
+        assertThat(FastPairDecoder.FILTER.matches(
+                bleSighting(newFastPairRecord(Hex.stringToBytes("000001"))))).isTrue();
+        assertThat(FastPairDecoder.FILTER.matches(
+                bleSighting(newFastPairRecord(Hex.stringToBytes("098FEC"))))).isTrue();
+        assertThat(FastPairDecoder.FILTER.matches(
+                bleSighting(FastPairTestData.newFastPairRecord(
+                        LONG_MODEL_ID_HEADER, Hex.stringToBytes(LONG_MODEL_ID))))).isTrue();
+    }
 
     @Test
     public void getModelId() {
         assertThat(mDecoder.getBeaconIdBytes(parseFromBytes(getFastPairRecord())))
                 .isEqualTo(FAST_PAIR_MODEL_ID);
-        FastPairServiceData fastPairServiceData1 =
-                new FastPairServiceData(LONG_MODEL_ID_HEADER,
-                        LONG_MODEL_ID);
-        assertThat(
-                mDecoder.getBeaconIdBytes(
-                        newBleRecord(fastPairServiceData1.createServiceData())))
-                .isEqualTo(Hex.stringToBytes(LONG_MODEL_ID));
         FastPairServiceData fastPairServiceData =
-                new FastPairServiceData(PADDED_LONG_MODEL_ID_HEADER,
-                        PADDED_LONG_MODEL_ID);
+                new FastPairServiceData(LONG_MODEL_ID_HEADER, LONG_MODEL_ID);
         assertThat(
                 mDecoder.getBeaconIdBytes(
                         newBleRecord(fastPairServiceData.createServiceData())))
+                .isEqualTo(Hex.stringToBytes(LONG_MODEL_ID));
+
+        FastPairServiceData fastPairServiceData1 =
+                new FastPairServiceData(PADDED_LONG_MODEL_ID_HEADER, PADDED_LONG_MODEL_ID);
+        assertThat(
+                mDecoder.getBeaconIdBytes(
+                        newBleRecord(fastPairServiceData1.createServiceData())))
                 .isEqualTo(Hex.stringToBytes(TRIMMED_LONG_MODEL_ID));
     }
 
     @Test
-    public void getBloomFilter() {
-        FastPairServiceData fastPairServiceData = new FastPairServiceData(MODEL_ID_HEADER,
-                MODEL_ID);
-        fastPairServiceData.mExtraFieldHeaders.add(BLOOM_FILTER_HEADER);
-        fastPairServiceData.mExtraFields.add(BLOOM_FILTER);
-        assertThat(FastPairDecoder.getBloomFilter(fastPairServiceData.createServiceData()))
-                .isEqualTo(Hex.stringToBytes(BLOOM_FILTER));
+    public void getBeaconIdType() {
+        assertThat(mDecoder.getBeaconIdType()).isEqualTo(1);
     }
 
     @Test
-    public void getBloomFilter_smallModelId() {
-        FastPairServiceData fastPairServiceData = new FastPairServiceData(null, MODEL_ID);
-        assertThat(FastPairDecoder.getBloomFilter(fastPairServiceData.createServiceData()))
+    public void getCalibratedBeaconTxPower() {
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData(LONG_MODEL_ID_HEADER, LONG_MODEL_ID);
+        assertThat(
+                mDecoder.getCalibratedBeaconTxPower(
+                        newBleRecord(fastPairServiceData.createServiceData())))
                 .isNull();
     }
 
     @Test
-    public void getBloomFilterSalt_modelIdAndMultipleExtraFields() {
-        FastPairServiceData fastPairServiceData = new FastPairServiceData(MODEL_ID_HEADER,
-                MODEL_ID);
-        fastPairServiceData.mExtraFieldHeaders.add(BLOOM_FILTER_HEADER);
-        fastPairServiceData.mExtraFieldHeaders.add(BLOOM_FILTER_SALT_HEADER);
-        fastPairServiceData.mExtraFields.add(BLOOM_FILTER);
-        fastPairServiceData.mExtraFields.add(BLOOM_FILTER_SALT);
+    public void getServiceDataArray() {
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData(LONG_MODEL_ID_HEADER, LONG_MODEL_ID);
         assertThat(
-                FastPairDecoder.getBloomFilterSalt(fastPairServiceData.createServiceData()))
-                .isEqualTo(Hex.stringToBytes(BLOOM_FILTER_SALT));
+                mDecoder.getServiceDataArray(
+                        newBleRecord(fastPairServiceData.createServiceData())))
+                .isEqualTo(Hex.stringToBytes("101122334455667788"));
     }
 
     @Test
-    public void getRandomResolvableData_whenContainConnectionState() {
-        FastPairServiceData fastPairServiceData = new FastPairServiceData(MODEL_ID_HEADER,
-                MODEL_ID);
-        fastPairServiceData.mExtraFieldHeaders.add(RANDOM_RESOLVABLE_DATA_HEADER);
-        fastPairServiceData.mExtraFields.add(RANDOM_RESOLVABLE_DATA);
+    public void hasBloomFilter() {
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData(LONG_MODEL_ID_HEADER, LONG_MODEL_ID);
         assertThat(
-                FastPairDecoder.getRandomResolvableData(fastPairServiceData
-                                .createServiceData()))
-                .isEqualTo(Hex.stringToBytes(RANDOM_RESOLVABLE_DATA));
+                mDecoder.hasBloomFilter(
+                        newBleRecord(fastPairServiceData.createServiceData())))
+                .isFalse();
+    }
+
+    @Test
+    public void hasModelId_allCases() {
+        // One type of the format is just the 3-byte model ID. This format has no header byte (all 3
+        // service data bytes are the model ID in little endian).
+        assertThat(hasModelId("112233", mDecoder)).isTrue();
+
+        // If the model ID is shorter than 3 bytes, then return null.
+        assertThat(hasModelId("11", mDecoder)).isFalse();
+
+        // If the data is longer than 3 bytes,
+        // byte 0 must be 0bVVVLLLLR (version, ID length, reserved).
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData((byte) 0b00001000, "11223344");
+        assertThat(
+                FastPairDecoder.hasBeaconIdBytes(
+                        newBleRecord(fastPairServiceData.createServiceData()))).isTrue();
+
+        FastPairServiceData fastPairServiceData1 =
+                new FastPairServiceData((byte) 0b00001010, "1122334455");
+        assertThat(
+                FastPairDecoder.hasBeaconIdBytes(
+                        newBleRecord(fastPairServiceData1.createServiceData()))).isTrue();
+
+        // Length bits correct, but version bits != version 0 (only supported version).
+        FastPairServiceData fastPairServiceData2 =
+                new FastPairServiceData((byte) 0b00101000, "11223344");
+        assertThat(
+                FastPairDecoder.hasBeaconIdBytes(
+                        newBleRecord(fastPairServiceData2.createServiceData()))).isFalse();
+
+        // Version bits correct, but length bits incorrect (too big, too small).
+        FastPairServiceData fastPairServiceData3 =
+                new FastPairServiceData((byte) 0b00001010, "11223344");
+        assertThat(
+                FastPairDecoder.hasBeaconIdBytes(
+                        newBleRecord(fastPairServiceData3.createServiceData()))).isFalse();
+
+        FastPairServiceData fastPairServiceData4 =
+                new FastPairServiceData((byte) 0b00000010, "11223344");
+        assertThat(
+                FastPairDecoder.hasBeaconIdBytes(
+                        newBleRecord(fastPairServiceData4.createServiceData()))).isFalse();
+    }
+
+    @Test
+    public void getBatteryLevel() {
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData(MODEL_ID_HEADER, MODEL_ID);
+        fastPairServiceData.mExtraFieldHeaders.add(BATTERY_HEADER);
+        fastPairServiceData.mExtraFields.add(BATTERY);
+        assertThat(
+                FastPairDecoder.getBatteryLevel(fastPairServiceData.createServiceData()))
+                .isEqualTo(Hex.stringToBytes(BATTERY));
+    }
+
+    @Test
+    public void getBatteryLevel_notIncludedInPacket() {
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData(MODEL_ID_HEADER, MODEL_ID);
+        fastPairServiceData.mExtraFieldHeaders.add(BLOOM_FILTER_HEADER);
+        fastPairServiceData.mExtraFields.add(BLOOM_FILTER);
+        assertThat(
+                FastPairDecoder.getBatteryLevel(fastPairServiceData.createServiceData())).isNull();
+    }
+
+    @Test
+    public void getBatteryLevel_noModelId() {
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData((byte) 0b00000000, null);
+        fastPairServiceData.mExtraFieldHeaders.add(BATTERY_HEADER);
+        fastPairServiceData.mExtraFields.add(BATTERY);
+        assertThat(
+                FastPairDecoder.getBatteryLevel(fastPairServiceData.createServiceData()))
+                .isEqualTo(Hex.stringToBytes(BATTERY));
+    }
+
+    @Test
+    public void getBatteryLevel_multipelExtraField() {
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData(MODEL_ID_HEADER, MODEL_ID);
+        fastPairServiceData.mExtraFieldHeaders.add(BATTERY_HEADER);
+        fastPairServiceData.mExtraFields.add(BATTERY);
+        fastPairServiceData.mExtraFieldHeaders.add(BLOOM_FILTER_HEADER);
+        fastPairServiceData.mExtraFields.add(BLOOM_FILTER);
+        assertThat(
+                FastPairDecoder.getBatteryLevel(fastPairServiceData.createServiceData()))
+                .isEqualTo(Hex.stringToBytes(BATTERY));
+    }
+
+    @Test
+    public void getBatteryLevelNoNotification() {
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData(MODEL_ID_HEADER, MODEL_ID);
+        fastPairServiceData.mExtraFieldHeaders.add(BATTERY_NO_NOTIFICATION_HEADER);
+        fastPairServiceData.mExtraFields.add(BATTERY);
+        assertThat(
+                FastPairDecoder.getBatteryLevelNoNotification(
+                        fastPairServiceData.createServiceData()))
+                .isEqualTo(Hex.stringToBytes(BATTERY));
+    }
+
+    @Test
+    public void getBatteryLevelNoNotification_notIncludedInPacket() {
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData(MODEL_ID_HEADER, MODEL_ID);
+        fastPairServiceData.mExtraFieldHeaders.add(BLOOM_FILTER_HEADER);
+        fastPairServiceData.mExtraFields.add(BLOOM_FILTER);
+        assertThat(
+                FastPairDecoder.getBatteryLevelNoNotification(
+                        fastPairServiceData.createServiceData())).isNull();
+    }
+
+    @Test
+    public void getBatteryLevelNoNotification_noModelId() {
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData((byte) 0b00000000, null);
+        fastPairServiceData.mExtraFieldHeaders.add(BATTERY_NO_NOTIFICATION_HEADER);
+        fastPairServiceData.mExtraFields.add(BATTERY);
+        assertThat(
+                FastPairDecoder.getBatteryLevelNoNotification(
+                        fastPairServiceData.createServiceData()))
+                .isEqualTo(Hex.stringToBytes(BATTERY));
+    }
+
+    @Test
+    public void getBatteryLevelNoNotification_multipleExtraField() {
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData(MODEL_ID_HEADER, MODEL_ID);
+        fastPairServiceData.mExtraFieldHeaders.add(BATTERY_NO_NOTIFICATION_HEADER);
+        fastPairServiceData.mExtraFields.add(BATTERY);
+        fastPairServiceData.mExtraFieldHeaders.add(BLOOM_FILTER_HEADER);
+        fastPairServiceData.mExtraFields.add(BLOOM_FILTER);
+        assertThat(
+                FastPairDecoder.getBatteryLevelNoNotification(
+                        fastPairServiceData.createServiceData()))
+                .isEqualTo(Hex.stringToBytes(BATTERY));
+    }
+
+    @Test
+    public void getBloomFilter() {
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData(MODEL_ID_HEADER, MODEL_ID);
+        fastPairServiceData.mExtraFieldHeaders.add(BLOOM_FILTER_HEADER);
+        fastPairServiceData.mExtraFields.add(BLOOM_FILTER);
+        assertThat(
+                FastPairDecoder.getBloomFilter(fastPairServiceData.createServiceData()))
+                .isEqualTo(Hex.stringToBytes(BLOOM_FILTER));
     }
 
     @Test
@@ -125,14 +299,222 @@
                 new FastPairServiceData(MODEL_ID_HEADER, MODEL_ID);
         fastPairServiceData.mExtraFieldHeaders.add(BLOOM_FILTER_NO_NOTIFICATION_HEADER);
         fastPairServiceData.mExtraFields.add(BLOOM_FILTER);
-        assertThat(FastPairDecoder.getBloomFilterNoNotification(fastPairServiceData
-                        .createServiceData())).isEqualTo(Hex.stringToBytes(BLOOM_FILTER));
+        assertThat(
+                FastPairDecoder.getBloomFilterNoNotification(
+                        fastPairServiceData.createServiceData()))
+                .isEqualTo(Hex.stringToBytes(BLOOM_FILTER));
+    }
+
+    @Test
+    public void getBloomFilter_smallModelId() {
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData(null, MODEL_ID);
+        assertThat(
+                FastPairDecoder.getBloomFilter(fastPairServiceData.createServiceData()))
+                .isNull();
+    }
+
+    @Test
+    public void getBloomFilter_headerVersionBitsNotZero() {
+        // Header bits are defined as 0bVVVLLLLR (V=version, L=length, R=reserved), must be zero.
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData((byte) 0b00100000, MODEL_ID);
+        fastPairServiceData.mExtraFieldHeaders.add(BLOOM_FILTER_HEADER);
+        fastPairServiceData.mExtraFields.add(BLOOM_FILTER);
+        assertThat(
+                FastPairDecoder.getBloomFilter(fastPairServiceData.createServiceData()))
+                .isNull();
+    }
+
+    @Test
+    public void getBloomFilter_noExtraFieldBytesIncluded() {
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData(MODEL_ID_HEADER, MODEL_ID);
+        fastPairServiceData.mExtraFieldHeaders.add(null);
+        fastPairServiceData.mExtraFields.add(null);
+        assertThat(
+                FastPairDecoder.getBloomFilter(fastPairServiceData.createServiceData()))
+                .isNull();
+    }
+
+    @Test
+    public void getBloomFilter_extraFieldLengthIsZero() {
+        // The extra field header is formatted as 0bLLLLTTTT (L=length, T=type).
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData(MODEL_ID_HEADER, MODEL_ID);
+        fastPairServiceData.mExtraFieldHeaders.add((byte) 0b00000000);
+        fastPairServiceData.mExtraFields.add(null);
+        assertThat(
+                FastPairDecoder.getBloomFilter(fastPairServiceData.createServiceData()))
+                .hasLength(0);
+    }
+
+    @Test
+    public void getBloomFilter_extraFieldLengthLongerThanPacket() {
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData(MODEL_ID_HEADER, MODEL_ID);
+        fastPairServiceData.mExtraFieldHeaders.add((byte) 0b11110000);
+        fastPairServiceData.mExtraFields.add("1122");
+        assertThat(
+                FastPairDecoder.getBloomFilter(fastPairServiceData.createServiceData()))
+                .isNull();
+    }
+
+    @Test
+    public void getBloomFilter_secondExtraFieldLengthLongerThanPacket() {
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData(MODEL_ID_HEADER, MODEL_ID);
+        fastPairServiceData.mExtraFieldHeaders.add((byte) 0b00100000);
+        fastPairServiceData.mExtraFields.add("1122");
+        fastPairServiceData.mExtraFieldHeaders.add((byte) 0b11110001);
+        fastPairServiceData.mExtraFields.add("3344");
+        assertThat(
+                FastPairDecoder.getBloomFilter(fastPairServiceData.createServiceData())).isNull();
+    }
+
+    @Test
+    public void getBloomFilter_typeIsWrong() {
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData(MODEL_ID_HEADER, MODEL_ID);
+        fastPairServiceData.mExtraFieldHeaders.add((byte) 0b01100001);
+        fastPairServiceData.mExtraFields.add("112233445566");
+        assertThat(
+                FastPairDecoder.getBloomFilter(fastPairServiceData.createServiceData()))
+                .isNull();
+    }
+
+    @Test
+    public void getBloomFilter_noModelId() {
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData((byte) 0b00000000, null);
+        fastPairServiceData.mExtraFieldHeaders.add(BLOOM_FILTER_HEADER);
+        fastPairServiceData.mExtraFields.add(BLOOM_FILTER);
+        assertThat(
+                FastPairDecoder.getBloomFilter(fastPairServiceData.createServiceData()))
+                .isEqualTo(Hex.stringToBytes(BLOOM_FILTER));
+    }
+
+    @Test
+    public void getBloomFilter_noModelIdAndMultipleExtraFields() {
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData((byte) 0b00000000, null);
+        fastPairServiceData.mExtraFieldHeaders.add(BLOOM_FILTER_HEADER);
+        fastPairServiceData.mExtraFields.add(BLOOM_FILTER);
+        fastPairServiceData.mExtraFieldHeaders.add((byte) 0b00010001);
+        fastPairServiceData.mExtraFields.add("00");
+        assertThat(
+                FastPairDecoder.getBloomFilter(fastPairServiceData.createServiceData()))
+                .isEqualTo(Hex.stringToBytes(BLOOM_FILTER));
+    }
+
+    @Test
+    public void getBloomFilter_modelIdAndMultipleExtraFields() {
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData(MODEL_ID_HEADER, MODEL_ID);
+        fastPairServiceData.mExtraFieldHeaders.add(BLOOM_FILTER_HEADER);
+        fastPairServiceData.mExtraFields.add(BLOOM_FILTER);
+        fastPairServiceData.mExtraFieldHeaders.add(BLOOM_FILTER_SALT_HEADER);
+        fastPairServiceData.mExtraFields.add(BLOOM_FILTER_SALT);
+        assertThat(
+                FastPairDecoder.getBloomFilter(fastPairServiceData.createServiceData()))
+                .isEqualTo(Hex.stringToBytes(BLOOM_FILTER));
+    }
+
+    @Test
+    public void getBloomFilterSalt_modelIdAndMultipleExtraFields() {
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData(MODEL_ID_HEADER, MODEL_ID);
+        fastPairServiceData.mExtraFieldHeaders.add(BLOOM_FILTER_HEADER);
+        fastPairServiceData.mExtraFields.add(BLOOM_FILTER);
+        fastPairServiceData.mExtraFieldHeaders.add(BLOOM_FILTER_SALT_HEADER);
+        fastPairServiceData.mExtraFields.add(BLOOM_FILTER_SALT);
+        assertThat(
+                FastPairDecoder.getBloomFilterSalt(fastPairServiceData.createServiceData()))
+                .isEqualTo(Hex.stringToBytes(BLOOM_FILTER_SALT));
+    }
+
+    @Test
+    public void getBloomFilter_modelIdAndMultipleExtraFieldsWithBloomFilterLast() {
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData(MODEL_ID_HEADER, MODEL_ID);
+        fastPairServiceData.mExtraFieldHeaders.add((byte) 0b00010001);
+        fastPairServiceData.mExtraFields.add("1A");
+        fastPairServiceData.mExtraFieldHeaders.add((byte) 0b00100010);
+        fastPairServiceData.mExtraFields.add("2CFE");
+        fastPairServiceData.mExtraFieldHeaders.add(BLOOM_FILTER_HEADER);
+        fastPairServiceData.mExtraFields.add(BLOOM_FILTER);
+        assertThat(
+                FastPairDecoder.getBloomFilter(fastPairServiceData.createServiceData()))
+                .isEqualTo(Hex.stringToBytes(BLOOM_FILTER));
+    }
+
+    @Test
+    public void getBloomFilter_modelIdAndMultipleExtraFieldsWithSameType() {
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData(MODEL_ID_HEADER, MODEL_ID);
+        fastPairServiceData.mExtraFieldHeaders.add(BLOOM_FILTER_HEADER);
+        fastPairServiceData.mExtraFields.add(BLOOM_FILTER);
+        fastPairServiceData.mExtraFieldHeaders.add(BLOOM_FILTER_HEADER);
+        fastPairServiceData.mExtraFields.add("000000000000");
+        assertThat(
+                FastPairDecoder.getBloomFilter(fastPairServiceData.createServiceData()))
+                .isEqualTo(Hex.stringToBytes(BLOOM_FILTER));
+    }
+
+    @Test
+    public void getBloomFilter_longExtraField() {
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData(MODEL_ID_HEADER, MODEL_ID);
+        fastPairServiceData.mExtraFieldHeaders.add(LONG_BLOOM_FILTER_HEADER);
+        fastPairServiceData.mExtraFields.add(LONG_BLOOM_FILTER);
+        fastPairServiceData.mExtraFieldHeaders.add(BLOOM_FILTER_HEADER);
+        fastPairServiceData.mExtraFields.add("000000000000");
+        assertThat(
+                FastPairDecoder.getBloomFilter(
+                        fastPairServiceData.createServiceData()))
+                .isEqualTo(Hex.stringToBytes(LONG_BLOOM_FILTER));
+    }
+
+    @Test
+    public void getRandomResolvableData_whenNoConnectionState() {
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData(MODEL_ID_HEADER, MODEL_ID);
+        assertThat(
+                FastPairDecoder.getRandomResolvableData(
+                        fastPairServiceData.createServiceData()))
+                .isEqualTo(null);
+    }
+
+    @Test
+    public void getRandomResolvableData_whenContainConnectionState() {
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData(MODEL_ID_HEADER, MODEL_ID);
+        fastPairServiceData.mExtraFieldHeaders.add(RANDOM_RESOLVABLE_DATA_HEADER);
+        fastPairServiceData.mExtraFields.add(RANDOM_RESOLVABLE_DATA);
+        assertThat(
+                FastPairDecoder.getRandomResolvableData(
+                        fastPairServiceData.createServiceData()))
+                .isEqualTo(Hex.stringToBytes(RANDOM_RESOLVABLE_DATA));
     }
 
     private static BleRecord newBleRecord(byte[] serviceDataBytes) {
         return parseFromBytes(newFastPairRecord(serviceDataBytes));
     }
-    class FastPairServiceData {
+
+    private static boolean hasModelId(String modelId, FastPairDecoder decoder) {
+        byte[] modelIdBytes = Hex.stringToBytes(modelId);
+        BleRecord bleRecord =
+                parseFromBytes(FastPairTestData.newFastPairRecord((byte) 0, modelIdBytes));
+        return FastPairDecoder.hasBeaconIdBytes(bleRecord)
+                && Arrays.equals(decoder.getBeaconIdBytes(bleRecord), modelIdBytes);
+    }
+
+    private BleSighting bleSighting(byte[] frame) {
+        return new BleSighting(mBluetoothDevice, frame, RSSI,
+                TimeUnit.MILLISECONDS.toNanos(System.currentTimeMillis()));
+    }
+
+    static class FastPairServiceData {
         private Byte mHeader;
         private String mModelId;
         List<Byte> mExtraFieldHeaders = new ArrayList<>();
@@ -164,6 +546,4 @@
             return serviceData;
         }
     }
-
-
 }
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/ble/util/RangingUtilsTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/ble/util/RangingUtilsTest.java
index ebe72b3..29f8d4e 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/common/ble/util/RangingUtilsTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/ble/util/RangingUtilsTest.java
@@ -48,8 +48,10 @@
         // RSSI expected at 1 meter based on the calibrated tx field of -41dBm
         // Using params: distance (m), int calibratedTxPower (dBm),
         int rssi = RangingUtils.rssiFromTargetDistance(1.0, -41);
+        int rssi1 = RangingUtils.rssiFromTargetDistance(0.0, -41);
 
         assertThat(rssi).isEqualTo(-82);
+        assertThat(rssi1).isEqualTo(-41);
     }
 
     @Test
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/ble/util/StringUtilsTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/ble/util/StringUtilsTest.java
new file mode 100644
index 0000000..6b20fdd
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/ble/util/StringUtilsTest.java
@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.ble.util;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.os.ParcelUuid;
+import android.util.SparseArray;
+
+import com.android.server.nearby.common.ble.BleRecord;
+
+import org.junit.Test;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class StringUtilsTest {
+    // iBeacon (Apple) Packet 1
+    private static final byte[] BEACON = {
+            // Flags
+            (byte) 0x02,
+            (byte) 0x01,
+            (byte) 0x06,
+            // Manufacturer-specific data header
+            (byte) 0x1a,
+            (byte) 0xff,
+            (byte) 0x4c,
+            (byte) 0x00,
+            // iBeacon Type
+            (byte) 0x02,
+            // Frame length
+            (byte) 0x15,
+            // iBeacon Proximity UUID
+            (byte) 0xf7,
+            (byte) 0x82,
+            (byte) 0x6d,
+            (byte) 0xa6,
+            (byte) 0x4f,
+            (byte) 0xa2,
+            (byte) 0x4e,
+            (byte) 0x98,
+            (byte) 0x80,
+            (byte) 0x24,
+            (byte) 0xbc,
+            (byte) 0x5b,
+            (byte) 0x71,
+            (byte) 0xe0,
+            (byte) 0x89,
+            (byte) 0x3e,
+            // iBeacon Instance ID (Major/Minor)
+            (byte) 0x44,
+            (byte) 0xd0,
+            (byte) 0x25,
+            (byte) 0x22,
+            // Tx Power
+            (byte) 0xb3,
+            // RSP
+            (byte) 0x08,
+            (byte) 0x09,
+            (byte) 0x4b,
+            (byte) 0x6f,
+            (byte) 0x6e,
+            (byte) 0x74,
+            (byte) 0x61,
+            (byte) 0x6b,
+            (byte) 0x74,
+            (byte) 0x02,
+            (byte) 0x0a,
+            (byte) 0xf4,
+            (byte) 0x0a,
+            (byte) 0x16,
+            (byte) 0x0d,
+            (byte) 0xd0,
+            (byte) 0x74,
+            (byte) 0x6d,
+            (byte) 0x4d,
+            (byte) 0x6b,
+            (byte) 0x32,
+            (byte) 0x36,
+            (byte) 0x64,
+            (byte) 0x00,
+            (byte) 0x00,
+            (byte) 0x00,
+            (byte) 0x00,
+            (byte) 0x00,
+            (byte) 0x00,
+            (byte) 0x00,
+            (byte) 0x00,
+            (byte) 0x00
+    };
+
+    @Test
+    public void testToString() {
+        BleRecord record = BleRecord.parseFromBytes(BEACON);
+        assertThat(StringUtils.toString((SparseArray<byte[]>) null)).isEqualTo("null");
+        assertThat(StringUtils.toString(new SparseArray<byte[]>())).isEqualTo("{}");
+        assertThat(StringUtils
+                .toString((Map<ParcelUuid, byte[]>) null)).isEqualTo("null");
+        assertThat(StringUtils
+                .toString(new HashMap<ParcelUuid, byte[]>())).isEqualTo("{}");
+        assertThat(StringUtils.toString(record.getManufacturerSpecificData()))
+                .isEqualTo("{76=[2, 21, -9, -126, 109, -90, 79, -94, 78, -104, -128,"
+                        + " 36, -68, 91, 113, -32, -119, 62, 68, -48, 37, 34, -77]}");
+        assertThat(StringUtils.toString(record.getServiceData()))
+                .isEqualTo("{0000d00d-0000-1000-8000-00805f9b34fb="
+                        + "[116, 109, 77, 107, 50, 54, 100]}");
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bloomfilter/BloomFilterTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bloomfilter/BloomFilterTest.java
new file mode 100644
index 0000000..30df81f
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bloomfilter/BloomFilterTest.java
@@ -0,0 +1,307 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bloomfilter;
+
+import static com.google.common.io.BaseEncoding.base16;
+import static com.google.common.primitives.Bytes.concat;
+import static com.google.common.truth.Truth.assertThat;
+import static com.google.common.truth.Truth.assertWithMessage;
+
+import org.junit.Test;
+
+import java.util.Arrays;
+
+/**
+ * Unit-tests for the {@link BloomFilter} class.
+ */
+public class BloomFilterTest {
+    private static final int BYTE_ARRAY_LENGTH = 100;
+
+    private final BloomFilter mBloomFilter =
+            new BloomFilter(new byte[BYTE_ARRAY_LENGTH], newHasher());
+
+    public BloomFilter.Hasher newHasher() {
+        return new FastPairBloomFilterHasher();
+    }
+
+    @Test
+    public void emptyFilter_returnsEmptyArray() throws Exception {
+        assertThat(mBloomFilter.asBytes()).isEqualTo(new byte[BYTE_ARRAY_LENGTH]);
+    }
+
+    @Test
+    public void emptyFilter_neverContains() throws Exception {
+        assertThat(mBloomFilter.possiblyContains(element(1))).isFalse();
+        assertThat(mBloomFilter.possiblyContains(element(2))).isFalse();
+        assertThat(mBloomFilter.possiblyContains(element(3))).isFalse();
+    }
+
+    @Test
+    public void add() throws Exception {
+        assertThat(mBloomFilter.possiblyContains(element(1))).isFalse();
+        mBloomFilter.add(element(1));
+        assertThat(mBloomFilter.possiblyContains(element(1))).isTrue();
+    }
+
+    @Test
+    public void add_onlyGivenArgAdded() throws Exception {
+        mBloomFilter.add(element(1));
+        assertThat(mBloomFilter.possiblyContains(element(1))).isTrue();
+        assertThat(mBloomFilter.possiblyContains(element(2))).isFalse();
+        assertThat(mBloomFilter.possiblyContains(element(3))).isFalse();
+    }
+
+    @Test
+    public void add_multipleArgs() throws Exception {
+        mBloomFilter.add(element(1));
+        mBloomFilter.add(element(2));
+        assertThat(mBloomFilter.possiblyContains(element(1))).isTrue();
+        assertThat(mBloomFilter.possiblyContains(element(2))).isTrue();
+        assertThat(mBloomFilter.possiblyContains(element(3))).isFalse();
+    }
+
+    /**
+     * This test was added because of a bug where the BloomFilter doesn't utilize all bits given.
+     * Functionally, the filter still works, but we just have a much higher false positive rate. The
+     * bug was caused by confusing bit length and byte length, which made our BloomFilter only set
+     * bits on the first byteLength (bitLength / 8) bits rather than the whole bitLength bits.
+     *
+     * <p>Here, we're verifying that the bits set are somewhat scattered. So instead of something
+     * like [ 0, 1, 1, 0, 0, 0, 0, ..., 0 ], we should be getting something like
+     * [ 0, 1, 0, 0, 1, 1, 0, 0,0, 1, ..., 1, 0].
+     */
+    @Test
+    public void randomness_noEndBias() throws Exception {
+        // Add one element to our BloomFilter.
+        mBloomFilter.add(element(1));
+
+        // Record the amount of non-zero bytes and the longest streak of zero bytes in the resulting
+        // BloomFilter. This is an approximation of reasonable distribution since we're recording by
+        // bytes instead of bits.
+        int nonZeroCount = 0;
+        int longestZeroStreak = 0;
+        int currentZeroStreak = 0;
+        for (byte b : mBloomFilter.asBytes()) {
+            if (b == 0) {
+                currentZeroStreak++;
+            } else {
+                // Increment the number of non-zero bytes we've seen, update the longest zero
+                // streak, and then reset the current zero streak.
+                nonZeroCount++;
+                longestZeroStreak = Math.max(longestZeroStreak, currentZeroStreak);
+                currentZeroStreak = 0;
+            }
+        }
+        // Update the longest zero streak again for the tail case.
+        longestZeroStreak = Math.max(longestZeroStreak, currentZeroStreak);
+
+        // Since randomness is hard to measure within one unit test, we instead do a valid check.
+        // All non-zero bytes should not be packed into one end of the array.
+        //
+        // In this case, the size of one end is approximated to be:
+        //   BYTE_ARRAY_LENGTH / nonZeroCount.
+        // Therefore, the longest zero streak should be less than:
+        //   BYTE_ARRAY_LENGTH - one end of the array.
+        int longestAcceptableZeroStreak = BYTE_ARRAY_LENGTH - (BYTE_ARRAY_LENGTH / nonZeroCount);
+        assertThat(longestZeroStreak).isAtMost(longestAcceptableZeroStreak);
+    }
+
+    @Test
+    public void randomness_falsePositiveRate() throws Exception {
+        // Create a new BloomFilter with a length of only 10 bytes.
+        BloomFilter bloomFilter = new BloomFilter(new byte[10], newHasher());
+
+        // Add 5 distinct elements to the BloomFilter.
+        for (int i = 0; i < 5; i++) {
+            bloomFilter.add(element(i));
+        }
+
+        // Now test 100 other elements and record the number of false positives.
+        int falsePositives = 0;
+        for (int i = 5; i < 105; i++) {
+            falsePositives += bloomFilter.possiblyContains(element(i)) ? 1 : 0;
+        }
+
+        // We expect the false positive rate to be 3% with 5 elements in a 10 byte filter. Thus,
+        // we give a little leeway and verify that the false positive rate is no more than 5%.
+        assertWithMessage(
+                String.format(
+                        "False positive rate too large. Expected <= 5%%, but got %d%%.",
+                        falsePositives))
+                .that(falsePositives <= 5)
+                .isTrue();
+        System.out.printf("False positive rate: %d%%%n", falsePositives);
+    }
+
+
+    private String element(int index) {
+        return "ELEMENT_" + index;
+    }
+
+    @Test
+    public void specificBitPattern() throws Exception {
+        // Create a new BloomFilter along with a fixed set of elements
+        // and bit patterns to verify with.
+        BloomFilter bloomFilter = new BloomFilter(new byte[6], newHasher());
+        // Combine an account key and mac address.
+        byte[] element =
+                concat(
+                        base16().decode("11223344556677889900AABBCCDDEEFF"),
+                        base16().withSeparator(":", 2).decode("84:68:3E:00:02:11"));
+        byte[] expectedBitPattern = new byte[] {0x50, 0x00, 0x04, 0x15, 0x08, 0x01};
+
+        // Add the fixed elements to the filter.
+        bloomFilter.add(element);
+
+        // Verify that the resulting bytes match the expected one.
+        byte[] bloomFilterBytes = bloomFilter.asBytes();
+        assertWithMessage(
+                "Unexpected bit pattern. Expected %s, but got %s.",
+                base16().encode(expectedBitPattern), base16().encode(bloomFilterBytes))
+                .that(Arrays.equals(expectedBitPattern, bloomFilterBytes))
+                .isTrue();
+
+        // Verify that the expected bit pattern creates a BloomFilter containing all fixed elements.
+        bloomFilter = new BloomFilter(expectedBitPattern, newHasher());
+        assertThat(bloomFilter.possiblyContains(element)).isTrue();
+    }
+
+    // This test case has been on the spec,
+    // https://devsite.googleplex.com/nearby/fast-pair/spec#test_cases.
+    // Explicitly adds it here, and we can easily change the parameters (e.g. account key, ble
+    // address) to clarify test results with partners.
+    @Test
+    public void specificBitPattern_hasOneAccountKey() {
+        BloomFilter bloomFilter1 = new BloomFilter(new byte[4], newHasher());
+        BloomFilter bloomFilter2 = new BloomFilter(new byte[4], newHasher());
+        byte[] accountKey = base16().decode("11223344556677889900AABBCCDDEEFF");
+        byte[] salt1 = base16().decode("C7");
+        byte[] salt2 = base16().decode("C7C8");
+
+        // Add the fixed elements to the filter.
+        bloomFilter1.add(concat(accountKey, salt1));
+        bloomFilter2.add(concat(accountKey, salt2));
+
+        assertThat(bloomFilter1.asBytes()).isEqualTo(base16().decode("0A428810"));
+        assertThat(bloomFilter2.asBytes()).isEqualTo(base16().decode("020C802A"));
+    }
+
+    // Adds this test case to spec. We can easily change the parameters (e.g. account key, ble
+    // address, battery data) to clarify test results with partners.
+    @Test
+    public void specificBitPattern_hasOneAccountKey_withBatteryData() {
+        BloomFilter bloomFilter1 = new BloomFilter(new byte[4], newHasher());
+        BloomFilter bloomFilter2 = new BloomFilter(new byte[4], newHasher());
+        byte[] accountKey = base16().decode("11223344556677889900AABBCCDDEEFF");
+        byte[] salt1 = base16().decode("C7");
+        byte[] salt2 = base16().decode("C7C8");
+        byte[] batteryData = {
+                0b00110011, // length = 3, show UI indication.
+                0b01000000, // Left bud: not charging, battery level = 64.
+                0b01000000, // Right bud: not charging, battery level = 64.
+                0b01000000 // Case: not charging, battery level = 64.
+        };
+
+        // Adds battery data to build bloom filter.
+        bloomFilter1.add(concat(accountKey, salt1, batteryData));
+        bloomFilter2.add(concat(accountKey, salt2, batteryData));
+
+        assertThat(bloomFilter1.asBytes()).isEqualTo(base16().decode("4A00F000"));
+        assertThat(bloomFilter2.asBytes()).isEqualTo(base16().decode("0101460A"));
+    }
+
+    // This test case has been on the spec,
+    // https://devsite.googleplex.com/nearby/fast-pair/spec#test_cases.
+    // Explicitly adds it here, and we can easily change the parameters (e.g. account key, ble
+    // address) to clarify test results with partners.
+    @Test
+    public void specificBitPattern_hasTwoAccountKeys() {
+        BloomFilter bloomFilter1 = new BloomFilter(new byte[5], newHasher());
+        BloomFilter bloomFilter2 = new BloomFilter(new byte[5], newHasher());
+        byte[] accountKey1 = base16().decode("11223344556677889900AABBCCDDEEFF");
+        byte[] accountKey2 = base16().decode("11112222333344445555666677778888");
+        byte[] salt1 = base16().decode("C7");
+        byte[] salt2 = base16().decode("C7C8");
+
+        // Adds the fixed elements to the filter.
+        bloomFilter1.add(concat(accountKey1, salt1));
+        bloomFilter1.add(concat(accountKey2, salt1));
+        bloomFilter2.add(concat(accountKey1, salt2));
+        bloomFilter2.add(concat(accountKey2, salt2));
+
+        assertThat(bloomFilter1.asBytes()).isEqualTo(base16().decode("2FBA064200"));
+        assertThat(bloomFilter2.asBytes()).isEqualTo(base16().decode("844A62208B"));
+    }
+
+    // Adds this test case to spec. We can easily change the parameters (e.g. account keys, ble
+    // address, battery data) to clarify test results with partners.
+    @Test
+    public void specificBitPattern_hasTwoAccountKeys_withBatteryData() {
+        BloomFilter bloomFilter1 = new BloomFilter(new byte[5], newHasher());
+        BloomFilter bloomFilter2 = new BloomFilter(new byte[5], newHasher());
+        byte[] accountKey1 = base16().decode("11223344556677889900AABBCCDDEEFF");
+        byte[] accountKey2 = base16().decode("11112222333344445555666677778888");
+        byte[] salt1 = base16().decode("C7");
+        byte[] salt2 = base16().decode("C7C8");
+        byte[] batteryData = {
+                0b00110011, // length = 3, show UI indication.
+                0b01000000, // Left bud: not charging, battery level = 64.
+                0b01000000, // Right bud: not charging, battery level = 64.
+                0b01000000 // Case: not charging, battery level = 64.
+        };
+
+        // Adds battery data to build bloom filter.
+        bloomFilter1.add(concat(accountKey1, salt1, batteryData));
+        bloomFilter1.add(concat(accountKey2, salt1, batteryData));
+        bloomFilter2.add(concat(accountKey1, salt2, batteryData));
+        bloomFilter2.add(concat(accountKey2, salt2, batteryData));
+
+        assertThat(bloomFilter1.asBytes()).isEqualTo(base16().decode("102256C04D"));
+        assertThat(bloomFilter2.asBytes()).isEqualTo(base16().decode("461524D008"));
+    }
+
+    // Adds this test case to spec. We can easily change the parameters (e.g. account keys, ble
+    // address, battery data and battery remaining time) to clarify test results with partners.
+    @Test
+    public void specificBitPattern_hasTwoAccountKeys_withBatteryLevelAndRemainingTime() {
+        BloomFilter bloomFilter1 = new BloomFilter(new byte[5], newHasher());
+        BloomFilter bloomFilter2 = new BloomFilter(new byte[5], newHasher());
+        byte[] accountKey1 = base16().decode("11223344556677889900AABBCCDDEEFF");
+        byte[] accountKey2 = base16().decode("11112222333344445555666677778888");
+        byte[] salt1 = base16().decode("C7");
+        byte[] salt2 = base16().decode("C7C8");
+        byte[] batteryData = {
+                0b00110011, // length = 3, show UI indication.
+                0b01000000, // Left bud: not charging, battery level = 64.
+                0b01000000, // Right bud: not charging, battery level = 64.
+                0b01000000 // Case: not charging, battery level = 64.
+        };
+        byte[] batteryRemainingTime = {
+                0b00010101, // length = 1, type = 0b0101 (remaining battery time).
+                0x1E, // remaining battery time (in minutes) =  30 minutes.
+        };
+
+        // Adds battery data to build bloom filter.
+        bloomFilter1.add(concat(accountKey1, salt1, batteryData, batteryRemainingTime));
+        bloomFilter1.add(concat(accountKey2, salt1, batteryData, batteryRemainingTime));
+        bloomFilter2.add(concat(accountKey1, salt2, batteryData, batteryRemainingTime));
+        bloomFilter2.add(concat(accountKey2, salt2, batteryData, batteryRemainingTime));
+
+        assertThat(bloomFilter1.asBytes()).isEqualTo(base16().decode("32A086B41A"));
+        assertThat(bloomFilter2.asBytes()).isEqualTo(base16().decode("C2A042043E"));
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bloomfilter/FastPairBloomFilterHasherTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bloomfilter/FastPairBloomFilterHasherTest.java
new file mode 100644
index 0000000..92c3b1a
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bloomfilter/FastPairBloomFilterHasherTest.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bloomfilter;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
+
+import org.junit.Test;
+
+import java.nio.charset.Charset;
+
+public class FastPairBloomFilterHasherTest {
+    private static final Charset CHARSET = UTF_8;
+    private static FastPairBloomFilterHasher sFastPairBloomFilterHasher =
+            new FastPairBloomFilterHasher();
+    @Test
+    public void getHashes() {
+        int[] hashe1 = sFastPairBloomFilterHasher.getHashes(element(1).getBytes(CHARSET));
+        int[] hashe2 = sFastPairBloomFilterHasher.getHashes(element(1).getBytes(CHARSET));
+        int[] hashe3 = sFastPairBloomFilterHasher.getHashes(element(2).getBytes(CHARSET));
+        assertThat(hashe1).isEqualTo(hashe2);
+        assertThat(hashe1).isNotEqualTo(hashe3);
+    }
+
+    private String element(int index) {
+        return "ELEMENT_" + index;
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/AdditionalDataEncoderTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/AdditionalDataEncoderTest.java
index 28d2fca..cf40fc6 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/AdditionalDataEncoderTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/AdditionalDataEncoderTest.java
@@ -63,6 +63,21 @@
 
     @Test
     @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void inputNullSecretKeyToEncode_mustThrowException() {
+        byte[] rawData = base16().decode("00112233445566778899AABBCCDDEEFF");
+
+        GeneralSecurityException exception =
+                assertThrows(
+                        GeneralSecurityException.class,
+                        () -> AdditionalDataEncoder.encodeAdditionalDataPacket(null, rawData));
+
+        assertThat(exception)
+                .hasMessageThat()
+                .contains("Incorrect secret for encoding additional data packet");
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
     public void inputIncorrectKeySizeToEncode_mustThrowException() {
         byte[] secret = new byte[KEY_LENGTH - 1];
         byte[] rawData = base16().decode("00112233445566778899AABBCCDDEEFF");
@@ -79,6 +94,54 @@
 
     @Test
     @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void inputNullAdditionalDataToEncode_mustThrowException()
+            throws GeneralSecurityException {
+        byte[] secret = AesCtrMultipleBlockEncryption.generateKey();
+
+        GeneralSecurityException exception =
+                assertThrows(
+                        GeneralSecurityException.class,
+                        () -> AdditionalDataEncoder.encodeAdditionalDataPacket(secret, null));
+
+        assertThat(exception)
+                .hasMessageThat()
+                .contains("Invalid data for encoding additional data packet");
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void inputInvalidAdditionalDataSizeToEncode_mustThrowException()
+            throws GeneralSecurityException {
+        byte[] secret = AesCtrMultipleBlockEncryption.generateKey();
+        byte[] rawData = base16().decode("");
+        GeneralSecurityException exception =
+                assertThrows(
+                        GeneralSecurityException.class,
+                        () -> AdditionalDataEncoder.encodeAdditionalDataPacket(secret, rawData));
+
+        assertThat(exception)
+                .hasMessageThat()
+                .contains("Invalid data for encoding additional data packet");
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void inputTooLargeAdditionalDataSizeToEncode_mustThrowException()
+            throws GeneralSecurityException {
+        byte[] secret = AesCtrMultipleBlockEncryption.generateKey();
+        byte[] rawData = new byte[MAX_LENGTH_OF_DATA + 1];
+        GeneralSecurityException exception =
+                assertThrows(
+                        GeneralSecurityException.class,
+                        () -> AdditionalDataEncoder.encodeAdditionalDataPacket(secret, rawData));
+
+        assertThat(exception)
+                .hasMessageThat()
+                .contains("Invalid data for encoding additional data packet");
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
     public void inputIncorrectKeySizeToDecode_mustThrowException() {
         byte[] secret = new byte[KEY_LENGTH - 1];
         byte[] packet = base16().decode("01234567890123456789");
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/BluetoothAudioPairerTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/BluetoothAudioPairerTest.java
index 0a56f2f..6871024 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/BluetoothAudioPairerTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/BluetoothAudioPairerTest.java
@@ -84,6 +84,23 @@
     }
 
     @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void getDevice() {
+        Context context = InstrumentationRegistry.getInstrumentation().getTargetContext();
+        try {
+            assertThat(new BluetoothAudioPairer(
+                    context,
+                    BLUETOOTH_DEVICE,
+                    Preferences.builder().build(),
+                    new EventLoggerWrapper(new TestEventLogger()),
+                    null /* KeyBasePairingInfo */,
+                    null /*PasskeyConfirmationHandler */,
+                    new TimingLogger(EVENT_NAME, Preferences.builder().build())).getDevice())
+                    .isEqualTo(BLUETOOTH_DEVICE);
+        } catch (PairingException e) {
+        }
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
     public void testBluetoothAudioPairerUnpairNoCrash() {
         Context context = InstrumentationRegistry.getInstrumentation().getTargetContext();
         try {
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/BluetoothClassicPairerTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/BluetoothClassicPairerTest.java
new file mode 100644
index 0000000..48f4b9b
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/BluetoothClassicPairerTest.java
@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.junit.Assert.assertThrows;
+
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothDevice;
+
+import androidx.test.core.app.ApplicationProvider;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mock;
+
+public class BluetoothClassicPairerTest {
+    @Mock
+    PasskeyConfirmationHandler mPasskeyConfirmationHandler;
+    private static final BluetoothDevice BLUETOOTH_DEVICE = BluetoothAdapter.getDefaultAdapter()
+            .getRemoteDevice("11:22:33:44:55:66");
+    private  BluetoothClassicPairer mBluetoothClassicPairer;
+
+    @Before
+    public void setUp() {
+        mBluetoothClassicPairer = new BluetoothClassicPairer(
+                ApplicationProvider.getApplicationContext(),
+                BLUETOOTH_DEVICE,
+                Preferences.builder().build(),
+                mPasskeyConfirmationHandler);
+    }
+
+    @Test
+    public void pair() throws PairingException {
+        PairingException exception =
+                assertThrows(
+                        PairingException.class,
+                        () -> mBluetoothClassicPairer.pair());
+
+        assertThat(exception)
+                .hasMessageThat()
+                .contains("BluetoothClassicPairer, createBond");
+        assertThat(mBluetoothClassicPairer.isPaired()).isFalse();
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/BytesTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/BytesTest.java
new file mode 100644
index 0000000..9450d60
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/BytesTest.java
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import androidx.test.filters.SdkSuppress;
+
+import junit.framework.TestCase;
+
+import java.nio.ByteOrder;
+import java.util.Arrays;
+
+/**
+ * Unit tests for {@link Bytes}.
+ */
+public class BytesTest extends TestCase {
+
+    private static final Bytes.Value VALUE1 =
+            new Bytes.Value(new byte[]{1, 2}, ByteOrder.BIG_ENDIAN);
+    private static final Bytes.Value VALUE2 =
+            new Bytes.Value(new byte[]{1, 2}, ByteOrder.BIG_ENDIAN);
+    private static final Bytes.Value VALUE3 =
+            new Bytes.Value(new byte[]{1, 3}, ByteOrder.BIG_ENDIAN);
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testEquals_asExpected()  {
+        assertThat(VALUE1.equals(VALUE2)).isTrue();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testNotEquals_asExpected()  {
+        assertThat(VALUE1.equals(VALUE3)).isFalse();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGetBytes_asExpected()  {
+        assertThat(Arrays.equals(VALUE1.getBytes(ByteOrder.BIG_ENDIAN), new byte[]{1, 2})).isTrue();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testToString()  {
+        assertThat(VALUE1.toString()).isEqualTo("0102");
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testReverse()  {
+        assertThat(VALUE1.reverse(new byte[]{1, 2})).isEqualTo(new byte[]{2, 1});
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/ConstantsTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/ConstantsTest.java
index f7ffa24..6684fbc 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/ConstantsTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/ConstantsTest.java
@@ -33,6 +33,8 @@
 import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic;
 import com.android.server.nearby.common.bluetooth.gatt.BluetoothGattConnection;
 
+import com.google.common.collect.ImmutableList;
+
 import junit.framework.TestCase;
 
 import org.mockito.Mock;
@@ -44,6 +46,8 @@
  */
 public class ConstantsTest extends TestCase {
 
+    private static final int PASSKEY = 32689;
+
     @Mock
     private BluetoothGattConnection mMockGattConnection;
 
@@ -78,4 +82,62 @@
         assertThat(KeyBasedPairingCharacteristic.getId(mMockGattConnection))
                 .isEqualTo(OLD_KEY_BASE_PAIRING_CHARACTERISTICS);
     }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_accountKeyCharacteristic_notCrash() throws BluetoothException {
+        Constants.FastPairService.AccountKeyCharacteristic.getId(mMockGattConnection);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_additionalDataCharacteristic_notCrash() throws BluetoothException {
+        Constants.FastPairService.AdditionalDataCharacteristic.getId(mMockGattConnection);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_nameCharacteristic_notCrash() throws BluetoothException {
+        Constants.FastPairService.NameCharacteristic.getId(mMockGattConnection);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_passKeyCharacteristic_encryptDecryptSuccessfully()
+            throws java.security.GeneralSecurityException {
+        byte[] secret = AesEcbSingleBlockEncryption.generateKey();
+
+        Constants.FastPairService.PasskeyCharacteristic.getId(mMockGattConnection);
+        assertThat(
+                Constants.FastPairService.PasskeyCharacteristic.decrypt(
+                        Constants.FastPairService.PasskeyCharacteristic.Type.SEEKER,
+                        secret,
+                        Constants.FastPairService.PasskeyCharacteristic.encrypt(
+                                Constants.FastPairService.PasskeyCharacteristic.Type.SEEKER,
+                                secret,
+                                PASSKEY))
+        ).isEqualTo(PASSKEY);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_beaconActionsCharacteristic_notCrash() throws BluetoothException {
+        Constants.FastPairService.BeaconActionsCharacteristic.getId(mMockGattConnection);
+        for (byte b : ImmutableList.of(
+                (byte) Constants.FastPairService.BeaconActionsCharacteristic.BeaconActionType
+                        .READ_BEACON_PARAMETERS,
+                (byte) Constants.FastPairService.BeaconActionsCharacteristic.BeaconActionType
+                        .READ_PROVISIONING_STATE,
+                (byte) Constants.FastPairService.BeaconActionsCharacteristic.BeaconActionType
+                        .SET_EPHEMERAL_IDENTITY_KEY,
+                (byte) Constants.FastPairService.BeaconActionsCharacteristic.BeaconActionType
+                        .CLEAR_EPHEMERAL_IDENTITY_KEY,
+                (byte) Constants.FastPairService.BeaconActionsCharacteristic.BeaconActionType
+                        .READ_EPHEMERAL_IDENTITY_KEY,
+                (byte) Constants.FastPairService.BeaconActionsCharacteristic.BeaconActionType
+                        .RING,
+                (byte) Constants.FastPairService.BeaconActionsCharacteristic.BeaconActionType
+                        .READ_RINGING_STATE,
+                (byte) Constants.FastPairService.BeaconActionsCharacteristic.BeaconActionType
+                        .UNKNOWN
+        )) {
+            assertThat(Constants.FastPairService.BeaconActionsCharacteristic
+                    .valueOf(b)).isEqualTo(b);
+        }
+    }
 }
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/CreateBondExceptionTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/CreateBondExceptionTest.java
new file mode 100644
index 0000000..052e696
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/CreateBondExceptionTest.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import androidx.test.filters.SdkSuppress;
+
+import com.android.server.nearby.common.bluetooth.BluetoothException;
+import com.android.server.nearby.intdefs.FastPairEventIntDefs;
+
+import junit.framework.TestCase;
+
+/**
+ * Unit tests for {@link CreateBondException}.
+ */
+public class CreateBondExceptionTest extends TestCase {
+
+    private static final String FORMAT = "FORMAT";
+    private static final int REASON = 0;
+    private static final CreateBondException EXCEPTION = new CreateBondException(
+            FastPairEventIntDefs.CreateBondErrorCode.INCORRECT_VARIANT, REASON, FORMAT);
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_getter_asExpected() throws BluetoothException {
+        assertThat(EXCEPTION.getErrorCode()).isEqualTo(
+                FastPairEventIntDefs.CreateBondErrorCode.INCORRECT_VARIANT);
+        assertThat(EXCEPTION.getReason()).isSameInstanceAs(REASON);
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/DeviceIntentReceiverTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/DeviceIntentReceiverTest.java
new file mode 100644
index 0000000..94bf111
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/DeviceIntentReceiverTest.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static org.mockito.MockitoAnnotations.initMocks;
+
+import android.bluetooth.BluetoothDevice;
+import android.content.Context;
+import android.content.Intent;
+
+import androidx.test.filters.SdkSuppress;
+import androidx.test.platform.app.InstrumentationRegistry;
+
+import junit.framework.TestCase;
+
+import org.mockito.Mock;
+
+/**
+ * Unit tests for {@link DeviceIntentReceiver}.
+ */
+public class DeviceIntentReceiverTest extends TestCase {
+    @Mock Preferences mPreferences;
+    @Mock BluetoothDevice mBluetoothDevice;
+
+    private DeviceIntentReceiver mDeviceIntentReceiver;
+    private Intent mIntent;
+
+    @Override
+    protected void setUp() throws Exception {
+        super.setUp();
+        initMocks(this);
+
+        Context context = InstrumentationRegistry.getInstrumentation().getContext();
+        mDeviceIntentReceiver = DeviceIntentReceiver.oneShotReceiver(
+                context, mPreferences, mBluetoothDevice);
+
+        mIntent = new Intent().putExtra(BluetoothDevice.EXTRA_DEVICE, mBluetoothDevice);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_onReceive_notCrash() throws Exception {
+        mDeviceIntentReceiver.onReceive(mIntent);
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/EventTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/EventTest.java
index 28e925f..1b63ad0 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/EventTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/EventTest.java
@@ -58,6 +58,13 @@
                         .setBluetoothDevice(BLUETOOTH_DEVICE)
                         .setProfile(PROFILE)
                         .build();
+        assertThat(event.hasBluetoothDevice()).isTrue();
+        assertThat(event.hasProfile()).isTrue();
+        assertThat(event.isFailure()).isTrue();
+        assertThat(event.toString()).isEqualTo(
+                "Event{eventCode=1120, timestamp=1234, profile=1, "
+                        + "bluetoothDevice=11:22:33:44:55:66, "
+                        + "exception=java.lang.Exception: Test exception}");
 
         Parcel parcel = Parcel.obtain();
         event.writeToParcel(parcel, event.describeContents());
@@ -70,5 +77,8 @@
         assertThat(result.getEventCode()).isEqualTo(event.getEventCode());
         assertThat(result.getBluetoothDevice()).isEqualTo(event.getBluetoothDevice());
         assertThat(result.getProfile()).isEqualTo(event.getProfile());
+        assertThat(result.equals(event)).isTrue();
+
+        assertThat(Event.CREATOR.newArray(10)).isNotEmpty();
     }
 }
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/FastPairDualConnectionTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/FastPairDualConnectionTest.java
index a103a72..63c39b2 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/FastPairDualConnectionTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/FastPairDualConnectionTest.java
@@ -23,9 +23,11 @@
 
 import static com.google.common.truth.Truth.assertThat;
 
+import static org.junit.Assert.assertThrows;
 import static org.mockito.ArgumentMatchers.anyBoolean;
 import static org.mockito.ArgumentMatchers.anyShort;
 import static org.mockito.Mockito.doNothing;
+import static org.mockito.Mockito.when;
 
 import android.bluetooth.BluetoothAdapter;
 import android.bluetooth.BluetoothDevice;
@@ -45,6 +47,7 @@
 
 import junit.framework.TestCase;
 
+import org.junit.Test;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 
@@ -75,6 +78,8 @@
     private TestEventLogger mEventLogger;
     @Mock private TimingLogger mTimingLogger;
     @Mock private BluetoothAudioPairer mBluetoothAudioPairer;
+    @Mock private android.bluetooth.BluetoothAdapter mBluetoothAdapter;
+    @Mock FastPairDualConnection mFastPairDualConnection;
 
     @Override
     public void setUp() throws Exception {
@@ -287,6 +292,23 @@
         }
     }
 
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testReflectionException()
+            throws BluetoothException, ReflectionException, ExecutionException,
+            InterruptedException, PairingException, TimeoutException {
+        when(mFastPairDualConnection.pair())
+                .thenThrow(new ReflectionException(
+                        new NoSuchMethodException("testReflectionException")));
+        ReflectionException exception =
+                assertThrows(
+                        ReflectionException.class,
+                        () -> mFastPairDualConnection.pair());
+        assertThat(exception)
+                .hasMessageThat()
+                .contains("testReflectionException");
+    }
+
     @SdkSuppress(minSdkVersion = 32, codeName = "T")
     public void testHistoryItem() {
         FastPairDualConnection connection = new FastPairDualConnection(
@@ -307,6 +329,11 @@
                 .isFalse();
     }
 
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGetLeState() throws ReflectionException {
+        FastPairDualConnection.getLeState(mBluetoothAdapter);
+    }
+
     static class TestEventLogger implements EventLogger {
 
         private List<Item> mLogs = new ArrayList<>();
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/HandshakeHandlerTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/HandshakeHandlerTest.java
new file mode 100644
index 0000000..e53e60f
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/HandshakeHandlerTest.java
@@ -0,0 +1,524 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.BLUETOOTH_ADDRESS_LENGTH;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.ActionOverBleFlag.ADDITIONAL_DATA_CHARACTERISTIC;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.ActionOverBleFlag.DEVICE_ACTION;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.KeyBasedPairingRequestFlag.PROVIDER_INITIATES_BONDING;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.KeyBasedPairingRequestFlag.REQUEST_DEVICE_NAME;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.KeyBasedPairingRequestFlag.REQUEST_DISCOVERABLE;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.KeyBasedPairingRequestFlag.REQUEST_RETROACTIVE_PAIR;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.Request.ADDITIONAL_DATA_TYPE_INDEX;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.junit.Assert.assertThrows;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyLong;
+import static org.mockito.Mockito.inOrder;
+import static org.mockito.Mockito.when;
+
+import android.platform.test.annotations.Presubmit;
+
+import androidx.annotation.Nullable;
+import androidx.core.util.Consumer;
+import androidx.test.core.app.ApplicationProvider;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+import androidx.test.filters.SmallTest;
+
+import com.android.server.nearby.common.bluetooth.BluetoothException;
+import com.android.server.nearby.common.bluetooth.BluetoothGattException;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.AdditionalDataCharacteristic.AdditionalDataType;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.Request;
+import com.android.server.nearby.common.bluetooth.gatt.BluetoothGattConnection;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.BluetoothAdapter;
+import com.android.server.nearby.common.bluetooth.util.BluetoothOperationExecutor;
+import com.android.server.nearby.intdefs.NearbyEventIntDefs;
+
+import com.google.common.collect.ImmutableSet;
+import com.google.common.io.BaseEncoding;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.InOrder;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import java.security.GeneralSecurityException;
+import java.time.Duration;
+import java.util.Arrays;
+
+/**
+ * Unit tests for {@link HandshakeHandler}.
+ */
+@Presubmit
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class HandshakeHandlerTest {
+
+    public static final byte[] PUBLIC_KEY =
+            BaseEncoding.base64().decode(
+                    "d2JTfvfdS6u7LmGfMOmco3C7ra3lW1k17AOly0LrBydDZURacfTY"
+                            + "IMmo5K1ejfD9e8b6qHsDTNzselhifi10kQ==");
+    private static final String SEEKER_ADDRESS = "A1:A2:A3:A4:A5:A6";
+    private static final String PROVIDER_BLE_ADDRESS = "11:22:33:44:55:66";
+    /**
+     * The random-resolvable private address (RPA) is sometimes used when advertising over BLE, to
+     * hide the static public address (otherwise, the Fast Pair device would b
+     * identifiable/trackable whenever it's BLE advertising).
+     */
+    private static final String RANDOM_PRIVATE_ADDRESS = "BB:BB:BB:BB:BB:1E";
+    private static final byte[] SHARED_SECRET =
+            BaseEncoding.base16().decode("0123456789ABCDEF0123456789ABCDEF");
+
+    @Mock EventLoggerWrapper mEventLoggerWrapper;
+    @Mock BluetoothGattConnection mBluetoothGattConnection;
+    @Mock BluetoothGattConnection.ChangeObserver mChangeObserver;
+    @Mock private Consumer<Integer> mRescueFromError;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void handshakeGattError_noRetryError_failed() throws BluetoothException {
+        HandshakeHandler.KeyBasedPairingRequest keyBasedPairingRequest =
+                new HandshakeHandler.KeyBasedPairingRequest.Builder()
+                        .setVerificationData(BluetoothAddress.decode(PROVIDER_BLE_ADDRESS))
+                        .build();
+        BluetoothGattException exception =
+                new BluetoothGattException("Exception for no retry", 257);
+        when(mChangeObserver.waitForUpdate(anyLong())).thenThrow(exception);
+        GattConnectionManager gattConnectionManager =
+                createGattConnectionManager(Preferences.builder(), () -> {});
+        gattConnectionManager.setGattConnection(mBluetoothGattConnection);
+        when(mBluetoothGattConnection.enableNotification(any(), any()))
+                .thenReturn(mChangeObserver);
+        InOrder inOrder = inOrder(mEventLoggerWrapper);
+
+        assertThrows(
+                BluetoothGattException.class,
+                () ->
+                        getHandshakeHandler(gattConnectionManager, address -> address)
+                                .doHandshakeWithRetryAndSignalLostCheck(
+                                        PUBLIC_KEY,
+                                        keyBasedPairingRequest,
+                                        mRescueFromError));
+
+        inOrder.verify(mEventLoggerWrapper).setCurrentEvent(
+                NearbyEventIntDefs.EventCode.SECRET_HANDSHAKE_GATT_COMMUNICATION);
+        inOrder.verify(mEventLoggerWrapper).logCurrentEventFailed(exception);
+        inOrder.verifyNoMoreInteractions();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void handshakeGattError_retryAndNoCount_throwException() throws BluetoothException {
+        HandshakeHandler.KeyBasedPairingRequest keyBasedPairingRequest =
+                new HandshakeHandler.KeyBasedPairingRequest.Builder()
+                        .setVerificationData(BluetoothAddress.decode(PROVIDER_BLE_ADDRESS))
+                        .build();
+        BluetoothGattException exception = new BluetoothGattException("Exception for retry", 133);
+        when(mChangeObserver.waitForUpdate(anyLong())).thenThrow(exception);
+        GattConnectionManager gattConnectionManager =
+                createGattConnectionManager(Preferences.builder(), () -> {});
+        gattConnectionManager.setGattConnection(mBluetoothGattConnection);
+        when(mBluetoothGattConnection.enableNotification(any(), any()))
+                .thenReturn(mChangeObserver);
+        InOrder inOrder = inOrder(mEventLoggerWrapper);
+
+        HandshakeHandler.HandshakeException handshakeException =
+                assertThrows(
+                        HandshakeHandler.HandshakeException.class,
+                        () -> getHandshakeHandler(gattConnectionManager, address -> address)
+                                .doHandshakeWithRetryAndSignalLostCheck(
+                                        PUBLIC_KEY, keyBasedPairingRequest, mRescueFromError));
+
+        inOrder.verify(mEventLoggerWrapper)
+                .setCurrentEvent(NearbyEventIntDefs.EventCode.SECRET_HANDSHAKE_GATT_COMMUNICATION);
+        inOrder.verify(mEventLoggerWrapper).logCurrentEventFailed(exception);
+        inOrder.verify(mEventLoggerWrapper)
+                .setCurrentEvent(NearbyEventIntDefs.EventCode.SECRET_HANDSHAKE_GATT_COMMUNICATION);
+        inOrder.verify(mEventLoggerWrapper).logCurrentEventFailed(exception);
+        inOrder.verify(mEventLoggerWrapper)
+                .setCurrentEvent(NearbyEventIntDefs.EventCode.SECRET_HANDSHAKE_GATT_COMMUNICATION);
+        inOrder.verify(mEventLoggerWrapper).logCurrentEventFailed(exception);
+        inOrder.verify(mEventLoggerWrapper)
+                .setCurrentEvent(NearbyEventIntDefs.EventCode.SECRET_HANDSHAKE_GATT_COMMUNICATION);
+        inOrder.verify(mEventLoggerWrapper).logCurrentEventFailed(exception);
+        inOrder.verifyNoMoreInteractions();
+        assertThat(handshakeException.getOriginalException()).isEqualTo(exception);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void handshakeGattError_noRetryOnTimeout_throwException() throws BluetoothException {
+        HandshakeHandler.KeyBasedPairingRequest keyBasedPairingRequest =
+                new HandshakeHandler.KeyBasedPairingRequest.Builder()
+                        .setVerificationData(BluetoothAddress.decode(PROVIDER_BLE_ADDRESS))
+                        .build();
+        BluetoothOperationExecutor.BluetoothOperationTimeoutException exception =
+                new BluetoothOperationExecutor.BluetoothOperationTimeoutException("Test timeout");
+        when(mChangeObserver.waitForUpdate(anyLong())).thenThrow(exception);
+        GattConnectionManager gattConnectionManager =
+                createGattConnectionManager(Preferences.builder(), () -> {});
+        gattConnectionManager.setGattConnection(mBluetoothGattConnection);
+        when(mBluetoothGattConnection.enableNotification(any(), any()))
+                .thenReturn(mChangeObserver);
+        InOrder inOrder = inOrder(mEventLoggerWrapper);
+
+        assertThrows(
+                HandshakeHandler.HandshakeException.class,
+                () ->
+                        new HandshakeHandler(
+                                gattConnectionManager,
+                                PROVIDER_BLE_ADDRESS,
+                                Preferences.builder().setRetrySecretHandshakeTimeout(false).build(),
+                                mEventLoggerWrapper,
+                                address -> address)
+                                .doHandshakeWithRetryAndSignalLostCheck(
+                                        PUBLIC_KEY, keyBasedPairingRequest, mRescueFromError));
+
+        inOrder.verify(mEventLoggerWrapper)
+                .setCurrentEvent(NearbyEventIntDefs.EventCode.SECRET_HANDSHAKE_GATT_COMMUNICATION);
+        inOrder.verify(mEventLoggerWrapper).logCurrentEventFailed(exception);
+        inOrder.verifyNoMoreInteractions();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void handshakeGattError_signalLost() throws BluetoothException {
+        HandshakeHandler.KeyBasedPairingRequest keyBasedPairingRequest =
+                new HandshakeHandler.KeyBasedPairingRequest.Builder()
+                        .setVerificationData(BluetoothAddress.decode(PROVIDER_BLE_ADDRESS))
+                        .build();
+        BluetoothGattException exception = new BluetoothGattException("Exception for retry", 133);
+        when(mChangeObserver.waitForUpdate(anyLong())).thenThrow(exception);
+        GattConnectionManager gattConnectionManager =
+                createGattConnectionManager(Preferences.builder(), () -> {});
+        gattConnectionManager.setGattConnection(mBluetoothGattConnection);
+        when(mBluetoothGattConnection.enableNotification(any(), any()))
+                .thenReturn(mChangeObserver);
+        InOrder inOrder = inOrder(mEventLoggerWrapper);
+
+        SignalLostException signalLostException =
+                assertThrows(
+                        SignalLostException.class,
+                        () -> getHandshakeHandler(gattConnectionManager, address -> null)
+                                .doHandshakeWithRetryAndSignalLostCheck(
+                                        PUBLIC_KEY, keyBasedPairingRequest, mRescueFromError));
+
+        inOrder.verify(mEventLoggerWrapper)
+                .setCurrentEvent(NearbyEventIntDefs.EventCode.SECRET_HANDSHAKE_GATT_COMMUNICATION);
+        inOrder.verify(mEventLoggerWrapper).logCurrentEventFailed(exception);
+        assertThat(signalLostException).hasCauseThat().isEqualTo(exception);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void handshakeGattError_addressRotate() throws BluetoothException {
+        HandshakeHandler.KeyBasedPairingRequest keyBasedPairingRequest =
+                new HandshakeHandler.KeyBasedPairingRequest.Builder()
+                        .setVerificationData(BluetoothAddress.decode(PROVIDER_BLE_ADDRESS))
+                        .build();
+        BluetoothGattException exception = new BluetoothGattException("Exception for retry", 133);
+        when(mChangeObserver.waitForUpdate(anyLong())).thenThrow(exception);
+        GattConnectionManager gattConnectionManager =
+                createGattConnectionManager(Preferences.builder(), () -> {});
+        gattConnectionManager.setGattConnection(mBluetoothGattConnection);
+        when(mBluetoothGattConnection.enableNotification(any(), any()))
+                .thenReturn(mChangeObserver);
+        InOrder inOrder = inOrder(mEventLoggerWrapper);
+
+        SignalRotatedException signalRotatedException =
+                assertThrows(
+                        SignalRotatedException.class,
+                        () -> getHandshakeHandler(
+                                gattConnectionManager, address -> "AA:BB:CC:DD:EE:FF")
+                                .doHandshakeWithRetryAndSignalLostCheck(
+                                        PUBLIC_KEY, keyBasedPairingRequest, mRescueFromError));
+
+        inOrder.verify(mEventLoggerWrapper).setCurrentEvent(
+                NearbyEventIntDefs.EventCode.SECRET_HANDSHAKE_GATT_COMMUNICATION);
+        inOrder.verify(mEventLoggerWrapper).logCurrentEventFailed(exception);
+        assertThat(signalRotatedException.getNewAddress()).isEqualTo("AA:BB:CC:DD:EE:FF");
+        assertThat(signalRotatedException).hasCauseThat().isEqualTo(exception);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void constructBytes_setRetroactiveFlag_decodeCorrectly() throws
+            GeneralSecurityException {
+        HandshakeHandler.KeyBasedPairingRequest keyBasedPairingRequest =
+                new HandshakeHandler.KeyBasedPairingRequest.Builder()
+                        .setVerificationData(BluetoothAddress.decode(PROVIDER_BLE_ADDRESS))
+                        .addFlag(REQUEST_RETROACTIVE_PAIR)
+                        .setSeekerPublicAddress(BluetoothAddress.decode(SEEKER_ADDRESS))
+                        .build();
+
+        byte[] encryptedRawMessage =
+                AesEcbSingleBlockEncryption.encrypt(
+                        SHARED_SECRET, keyBasedPairingRequest.getBytes());
+        HandshakeRequest handshakeRequest =
+                new HandshakeRequest(SHARED_SECRET, encryptedRawMessage);
+
+        assertThat(handshakeRequest.getType())
+                .isEqualTo(HandshakeRequest.Type.KEY_BASED_PAIRING_REQUEST);
+        assertThat(handshakeRequest.requestRetroactivePair()).isTrue();
+        assertThat(handshakeRequest.getVerificationData())
+                .isEqualTo(BluetoothAddress.decode(PROVIDER_BLE_ADDRESS));
+        assertThat(handshakeRequest.getSeekerPublicAddress())
+                .isEqualTo(BluetoothAddress.decode(SEEKER_ADDRESS));
+        assertThat(handshakeRequest.requestDeviceName()).isFalse();
+        assertThat(handshakeRequest.requestDiscoverable()).isFalse();
+        assertThat(handshakeRequest.requestProviderInitialBonding()).isFalse();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void getTimeout_notOverShortRetryMaxSpentTime_getShort() {
+        Preferences preferences = Preferences.builder().build();
+
+        assertThat(getHandshakeHandler(/* getEnable128BitCustomGattCharacteristicsId= */ true)
+                .getTimeoutMs(
+                        preferences.getSecretHandshakeShortTimeoutRetryMaxSpentTimeMs()
+                                - 1))
+                .isEqualTo(preferences.getSecretHandshakeShortTimeoutMs());
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void getTimeout_overShortRetryMaxSpentTime_getLong() {
+        Preferences preferences = Preferences.builder().build();
+
+        assertThat(getHandshakeHandler(/* getEnable128BitCustomGattCharacteristicsId= */ true)
+                .getTimeoutMs(
+                        preferences.getSecretHandshakeShortTimeoutRetryMaxSpentTimeMs()
+                                + 1))
+                .isEqualTo(preferences.getSecretHandshakeLongTimeoutMs());
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void getTimeout_retryNotEnabled_getOrigin() {
+        Preferences preferences = Preferences.builder().build();
+
+        assertThat(
+                new HandshakeHandler(
+                        createGattConnectionManager(Preferences.builder(), () -> {}),
+                        PROVIDER_BLE_ADDRESS,
+                        Preferences.builder()
+                                .setRetryGattConnectionAndSecretHandshake(false).build(),
+                        mEventLoggerWrapper,
+                        /* fastPairSignalChecker= */ null)
+                        .getTimeoutMs(0))
+                .isEqualTo(Duration.ofSeconds(
+                        preferences.getGattOperationTimeoutSeconds()).toMillis());
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void triggersActionOverBle_notCrash() {
+        HandshakeHandler.ActionOverBle.Builder actionOverBleBuilder =
+                new HandshakeHandler.ActionOverBle.Builder()
+                        .addFlag(
+                                Constants.FastPairService.KeyBasedPairingCharacteristic
+                                        .ActionOverBleFlag.ADDITIONAL_DATA_CHARACTERISTIC)
+                        .setVerificationData(BluetoothAddress.decode(RANDOM_PRIVATE_ADDRESS))
+                        .setAdditionalDataType(AdditionalDataType.PERSONALIZED_NAME)
+                        .setEvent(0, 0)
+                        .setEventAdditionalData(new byte[]{1})
+                        .getThis();
+        HandshakeHandler.ActionOverBle actionOverBle = actionOverBleBuilder.build();
+        assertThat(actionOverBle.getBytes().length).isEqualTo(16);
+        assertThat(
+                Arrays.equals(
+                        Arrays.copyOfRange(actionOverBle.getBytes(), 0, 12),
+                        new byte[]{
+                                (byte) 16, (byte)  -64, (byte) -69, (byte) -69,
+                                (byte) -69, (byte)  -69, (byte) -69, (byte) 30,
+                                (byte) 0, (byte) 0, (byte) 1, (byte) 1}))
+                .isTrue();
+    }
+
+    private GattConnectionManager createGattConnectionManager(
+            Preferences.Builder prefs, ToggleBluetoothTask toggleBluetooth) {
+        return new GattConnectionManager(
+                ApplicationProvider.getApplicationContext(),
+                prefs.build(),
+                new EventLoggerWrapper(null),
+                BluetoothAdapter.getDefaultAdapter(),
+                toggleBluetooth,
+                PROVIDER_BLE_ADDRESS,
+                new TimingLogger("GattConnectionManager", prefs.build()),
+                /* fastPairSignalChecker= */ null,
+                /* setMtu= */ false);
+    }
+
+    private HandshakeHandler getHandshakeHandler(
+            GattConnectionManager gattConnectionManager,
+            @Nullable FastPairConnection.FastPairSignalChecker fastPairSignalChecker) {
+        return new HandshakeHandler(
+                gattConnectionManager,
+                PROVIDER_BLE_ADDRESS,
+                Preferences.builder()
+                        .setGattConnectionAndSecretHandshakeNoRetryGattError(ImmutableSet.of(257))
+                        .setRetrySecretHandshakeTimeout(true)
+                        .build(),
+                mEventLoggerWrapper,
+                fastPairSignalChecker);
+    }
+
+    private HandshakeHandler getHandshakeHandler(
+            boolean getEnable128BitCustomGattCharacteristicsId) {
+        return new HandshakeHandler(
+                createGattConnectionManager(Preferences.builder(), () -> {}),
+                PROVIDER_BLE_ADDRESS,
+                Preferences.builder()
+                        .setGattOperationTimeoutSeconds(5)
+                        .setEnable128BitCustomGattCharacteristicsId(
+                                getEnable128BitCustomGattCharacteristicsId)
+                        .build(),
+                mEventLoggerWrapper,
+                /* fastPairSignalChecker= */ null);
+    }
+
+    private static class HandshakeRequest {
+
+        /**
+         * 16 bytes data: 1-byte for type, 1-byte for flags, 6-bytes for provider's BLE address, 8
+         * bytes optional data.
+         *
+         * @see {go/fast-pair-spec-handshake-message1}
+         */
+        private final byte[] mDecryptedMessage;
+
+        HandshakeRequest(byte[] key, byte[] encryptedPairingRequest)
+                throws GeneralSecurityException {
+            mDecryptedMessage = AesEcbSingleBlockEncryption.decrypt(key, encryptedPairingRequest);
+        }
+
+        /**
+         * Gets the type of this handshake request. Currently, we have 2 types: 0x00 for Key-based
+         * Pairing Request and 0x10 for Action Request.
+         */
+        public Type getType() {
+            return Type.valueOf(mDecryptedMessage[Request.TYPE_INDEX]);
+        }
+
+        /**
+         * Gets verification data of this handshake request.
+         * Currently, we use Provider's BLE address.
+         */
+        public byte[] getVerificationData() {
+            return Arrays.copyOfRange(
+                    mDecryptedMessage,
+                    Request.VERIFICATION_DATA_INDEX,
+                    Request.VERIFICATION_DATA_INDEX + Request.VERIFICATION_DATA_LENGTH);
+        }
+
+        /** Gets Seeker's public address of the handshake request. */
+        public byte[] getSeekerPublicAddress() {
+            return Arrays.copyOfRange(
+                    mDecryptedMessage,
+                    Request.SEEKER_PUBLIC_ADDRESS_INDEX,
+                    Request.SEEKER_PUBLIC_ADDRESS_INDEX + BLUETOOTH_ADDRESS_LENGTH);
+        }
+
+        /** Checks whether the Seeker request discoverability from flags byte. */
+        public boolean requestDiscoverable() {
+            return (getFlags() & REQUEST_DISCOVERABLE) != 0;
+        }
+
+        /**
+         * Checks whether the Seeker requests that the Provider shall initiate bonding from
+         * flags byte.
+         */
+        public boolean requestProviderInitialBonding() {
+            return (getFlags() & PROVIDER_INITIATES_BONDING) != 0;
+        }
+
+        /** Checks whether the Seeker requests that the Provider shall notify the existing name. */
+        public boolean requestDeviceName() {
+            return (getFlags() & REQUEST_DEVICE_NAME) != 0;
+        }
+
+        /** Checks whether this is for retroactively writing account key. */
+        public boolean requestRetroactivePair() {
+            return (getFlags() & REQUEST_RETROACTIVE_PAIR) != 0;
+        }
+
+        /** Gets the flags of this handshake request. */
+        private byte getFlags() {
+            return mDecryptedMessage[Request.FLAGS_INDEX];
+        }
+
+        /** Checks whether the Seeker requests a device action. */
+        public boolean requestDeviceAction() {
+            return (getFlags() & DEVICE_ACTION) != 0;
+        }
+
+        /**
+         * Checks whether the Seeker requests an action which will be followed by an additional
+         * data.
+         */
+        public boolean requestFollowedByAdditionalData() {
+            return (getFlags() & ADDITIONAL_DATA_CHARACTERISTIC) != 0;
+        }
+
+        /** Gets the {@link AdditionalDataType} of this handshake request. */
+        @AdditionalDataType
+        public int getAdditionalDataType() {
+            if (!requestFollowedByAdditionalData()
+                    || mDecryptedMessage.length <= ADDITIONAL_DATA_TYPE_INDEX) {
+                return AdditionalDataType.UNKNOWN;
+            }
+            return mDecryptedMessage[ADDITIONAL_DATA_TYPE_INDEX];
+        }
+
+        /** Enumerates the handshake message types. */
+        public enum Type {
+            KEY_BASED_PAIRING_REQUEST(Request.TYPE_KEY_BASED_PAIRING_REQUEST),
+            ACTION_OVER_BLE(Request.TYPE_ACTION_OVER_BLE),
+            UNKNOWN((byte) 0xFF);
+
+            private final byte mValue;
+
+            Type(byte type) {
+                mValue = type;
+            }
+
+            public static Type valueOf(byte value) {
+                for (Type type : Type.values()) {
+                    if (type.getValue() == value) {
+                        return type;
+                    }
+                }
+                return UNKNOWN;
+            }
+
+            public byte getValue() {
+                return mValue;
+            }
+        }
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/HeadsetPieceTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/HeadsetPieceTest.java
index 670b2ca..32e62a3 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/HeadsetPieceTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/HeadsetPieceTest.java
@@ -196,5 +196,63 @@
 
         assertThat(headsetPiece.isBatteryLow()).isFalse();
     }
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void describeContents() {
+        HeadsetPiece headsetPiece =
+                HeadsetPiece.builder()
+                        .setLowLevelThreshold(30)
+                        .setBatteryLevel(18)
+                        .setImageUrl("http://fake.image.path/image.png")
+                        .setCharging(true)
+                        .build();
+        assertThat(headsetPiece.describeContents()).isEqualTo(0);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void hashcode() {
+        HeadsetPiece headsetPiece =
+                HeadsetPiece.builder()
+                        .setLowLevelThreshold(30)
+                        .setBatteryLevel(18)
+                        .setImageUrl("http://fake.image.path/image.png")
+                        .setCharging(true)
+                        .build();
+        HeadsetPiece headsetPiece1 =
+                HeadsetPiece.builder()
+                        .setLowLevelThreshold(30)
+                        .setBatteryLevel(18)
+                        .setImageUrl("http://fake.image.path/image.png")
+                        .setCharging(true)
+                        .build();
+        assertThat(headsetPiece.hashCode()).isEqualTo(headsetPiece1.hashCode());
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testToString() {
+        HeadsetPiece headsetPiece =
+                HeadsetPiece.builder()
+                        .setLowLevelThreshold(30)
+                        .setBatteryLevel(18)
+                        .setImageUrl("http://fake.image.path/image.png")
+                        .setCharging(true)
+                        .build();
+        assertThat(headsetPiece.toString())
+                .isEqualTo("HeadsetPiece{lowLevelThreshold=30,"
+                        + " batteryLevel=18,"
+                        + " imageUrl=http://fake.image.path/image.png,"
+                        + " charging=true,"
+                        + " imageContentUri=null}");
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testCreatorNewArray() {
+        HeadsetPiece[]  headsetPieces =
+                HeadsetPiece.CREATOR.newArray(2);
+        assertThat(headsetPieces.length).isEqualTo(2);
+    }
 }
 
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/LtvTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/LtvTest.java
new file mode 100644
index 0000000..81a5d92
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/LtvTest.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.junit.Assert.assertThrows;
+
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+import androidx.test.filters.SmallTest;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+/**
+ * Unit tests for {@link Ltv}.
+ */
+@Presubmit
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class LtvTest {
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testParseEmpty_throwsException() throws Ltv.ParseException {
+        assertThrows(Ltv.ParseException.class,
+                () -> Ltv.parse(new byte[]{0}));
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testParse_finishesSuccessfully() throws Ltv.ParseException {
+        assertThat(Ltv.parse(new byte[]{3, 4, 5, 6})).isNotEmpty();
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/PairingProgressListenerTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/PairingProgressListenerTest.java
new file mode 100644
index 0000000..a58a92d
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/PairingProgressListenerTest.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import org.junit.Test;
+
+public class PairingProgressListenerTest {
+
+    @Test
+    public void testFromOrdinal() {
+        assertThat(PairingProgressListener.fromOrdinal(0)).isEqualTo(
+                PairingProgressListener.PairingEvent.START);
+        assertThat(PairingProgressListener.fromOrdinal(1)).isEqualTo(
+                PairingProgressListener.PairingEvent.SUCCESS);
+        assertThat(PairingProgressListener.fromOrdinal(2)).isEqualTo(
+                PairingProgressListener.PairingEvent.FAILED);
+        assertThat(PairingProgressListener.fromOrdinal(3)).isEqualTo(
+                PairingProgressListener.PairingEvent.UNKNOWN);
+        assertThat(PairingProgressListener.fromOrdinal(4)).isEqualTo(
+                PairingProgressListener.PairingEvent.UNKNOWN);
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/PreferencesTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/PreferencesTest.java
index b40a5a5..378e3b9 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/PreferencesTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/PreferencesTest.java
@@ -1266,12 +1266,38 @@
     public void testExtraLoggingInformation() {
         Preferences prefs =
                 Preferences.builder().setExtraLoggingInformation(FIRST_EXTRA_LOGGING_INFO).build();
-        assertThat(prefs.getExtraLoggingInformation()).isEqualTo(FIRST_EXTRA_LOGGING_INFO);
-        assertThat(prefs.toBuilder().build().getExtraLoggingInformation())
-                .isEqualTo(FIRST_EXTRA_LOGGING_INFO);
-
         Preferences prefs2 =
                 Preferences.builder().setExtraLoggingInformation(SECOND_EXTRA_LOGGING_INFO).build();
+        Preferences prefs3 =
+                Preferences.builder().setExtraLoggingInformation(FIRST_EXTRA_LOGGING_INFO).build();
+
+        assertThat(prefs.getExtraLoggingInformation()).isEqualTo(FIRST_EXTRA_LOGGING_INFO);
         assertThat(prefs2.getExtraLoggingInformation()).isEqualTo(SECOND_EXTRA_LOGGING_INFO);
+        assertThat(prefs.toBuilder().build().getExtraLoggingInformation())
+                .isEqualTo(FIRST_EXTRA_LOGGING_INFO);
+        // Test equal()
+        assertThat(prefs.getExtraLoggingInformation().equals(null)).isFalse();
+        assertThat(prefs.getExtraLoggingInformation()
+                .equals(prefs2.getExtraLoggingInformation())).isFalse();
+        assertThat(prefs.getExtraLoggingInformation()
+                .equals(prefs3.getExtraLoggingInformation())).isTrue();
+        // Test getModelId()
+        assertThat(prefs.getExtraLoggingInformation().getModelId())
+                .isEqualTo(prefs3.getExtraLoggingInformation().getModelId());
+        assertThat(prefs.getExtraLoggingInformation().getModelId())
+                .isNotEqualTo(prefs2.getExtraLoggingInformation().getModelId());
+        // Test hashCode()
+        assertThat(prefs.getExtraLoggingInformation().hashCode())
+                .isEqualTo(prefs3.getExtraLoggingInformation().hashCode());
+        assertThat(prefs.getExtraLoggingInformation().hashCode())
+                .isNotEqualTo(prefs2.getExtraLoggingInformation().hashCode());
+        // Test toBuilder()
+
+        assertThat(prefs.getExtraLoggingInformation()
+                .toBuilder().setModelId("000007").build().getModelId())
+                .isEqualTo("000007");
+        // Test toString()
+        assertThat(prefs.getExtraLoggingInformation().toString())
+                .isEqualTo("ExtraLoggingInformation{modelId=000006}");
     }
 }
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/TdsExceptionTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/TdsExceptionTest.java
new file mode 100644
index 0000000..e8b9480
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/TdsExceptionTest.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import com.android.server.nearby.intdefs.FastPairEventIntDefs;
+
+import org.junit.Test;
+
+public class TdsExceptionTest {
+    @Test
+    public void testGetErrorCode() {
+        TdsException tdsException = new TdsException(
+                FastPairEventIntDefs.BrEdrHandoverErrorCode.BLUETOOTH_MAC_INVALID, "format");
+        assertThat(tdsException.getErrorCode())
+                .isEqualTo(FastPairEventIntDefs.BrEdrHandoverErrorCode.BLUETOOTH_MAC_INVALID);
+
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothAdapterTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothAdapterTest.java
new file mode 100644
index 0000000..a9ab7da
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothAdapterTest.java
@@ -0,0 +1,148 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.testability.android.bluetooth;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.when;
+
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+import androidx.test.filters.SmallTest;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+/**
+ * Unit tests for {@link BluetoothAdapter}.
+ */
+@Presubmit
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class BluetoothAdapterTest {
+
+    private static final byte[] BYTES = new byte[]{0, 1, 2, 3, 4, 5};
+    private static final String ADDRESS = "00:11:22:33:AA:BB";
+
+    @Mock private android.bluetooth.BluetoothAdapter mBluetoothAdapter;
+    @Mock private android.bluetooth.BluetoothDevice mBluetoothDevice;
+    @Mock private android.bluetooth.le.BluetoothLeAdvertiser mBluetoothLeAdvertiser;
+    @Mock private android.bluetooth.le.BluetoothLeScanner mBluetoothLeScanner;
+
+    BluetoothAdapter mTestabilityBluetoothAdapter;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+        mTestabilityBluetoothAdapter = BluetoothAdapter.wrap(mBluetoothAdapter);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testWrapNullAdapter_isNull() {
+        assertThat(BluetoothAdapter.wrap(null)).isNull();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testWrapNonNullAdapter_isNotNull_unWrapSame() {
+        assertThat(mTestabilityBluetoothAdapter).isNotNull();
+        assertThat(mTestabilityBluetoothAdapter.unwrap()).isSameInstanceAs(mBluetoothAdapter);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testDisable_callsWrapped() {
+        when(mBluetoothAdapter.disable()).thenReturn(true);
+        assertThat(mTestabilityBluetoothAdapter.disable()).isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testEnable_callsWrapped() {
+        when(mBluetoothAdapter.enable()).thenReturn(true);
+        assertThat(mTestabilityBluetoothAdapter.enable()).isTrue();
+        when(mBluetoothAdapter.isEnabled()).thenReturn(true);
+        assertThat(mTestabilityBluetoothAdapter.isEnabled()).isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGetBluetoothLeAdvertiser_callsWrapped() {
+        when(mBluetoothAdapter.getBluetoothLeAdvertiser()).thenReturn(mBluetoothLeAdvertiser);
+        assertThat(mTestabilityBluetoothAdapter.getBluetoothLeAdvertiser().unwrap())
+                .isSameInstanceAs(mBluetoothLeAdvertiser);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGetBluetoothLeScanner_callsWrapped() {
+        when(mBluetoothAdapter.getBluetoothLeScanner()).thenReturn(mBluetoothLeScanner);
+        assertThat(mTestabilityBluetoothAdapter.getBluetoothLeScanner().unwrap())
+                .isSameInstanceAs(mBluetoothLeScanner);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGetBondedDevices_callsWrapped() {
+        when(mBluetoothAdapter.getBondedDevices()).thenReturn(null);
+        assertThat(mTestabilityBluetoothAdapter.getBondedDevices()).isNull();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testIsDiscovering_pcallsWrapped() {
+        when(mBluetoothAdapter.isDiscovering()).thenReturn(true);
+        assertThat(mTestabilityBluetoothAdapter.isDiscovering()).isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testStartDiscovery_callsWrapped() {
+        when(mBluetoothAdapter.startDiscovery()).thenReturn(true);
+        assertThat(mTestabilityBluetoothAdapter.startDiscovery()).isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testCancelDiscovery_callsWrapped() {
+        when(mBluetoothAdapter.cancelDiscovery()).thenReturn(true);
+        assertThat(mTestabilityBluetoothAdapter.cancelDiscovery()).isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGetRemoteDeviceBytes_callsWrapped() {
+        when(mBluetoothAdapter.getRemoteDevice(BYTES)).thenReturn(mBluetoothDevice);
+        assertThat(mTestabilityBluetoothAdapter.getRemoteDevice(BYTES).unwrap())
+                .isSameInstanceAs(mBluetoothDevice);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGetRemoteDeviceString_callsWrapped() {
+        when(mBluetoothAdapter.getRemoteDevice(ADDRESS)).thenReturn(mBluetoothDevice);
+        assertThat(mTestabilityBluetoothAdapter.getRemoteDevice(ADDRESS).unwrap())
+                .isSameInstanceAs(mBluetoothDevice);
+
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothDeviceTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothDeviceTest.java
new file mode 100644
index 0000000..d494024
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothDeviceTest.java
@@ -0,0 +1,206 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.testability.android.bluetooth;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+import androidx.test.filters.SmallTest;
+import androidx.test.platform.app.InstrumentationRegistry;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import java.io.IOException;
+import java.util.UUID;
+
+/**
+ * Unit tests for {@link BluetoothDevice}.
+ */
+@Presubmit
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class BluetoothDeviceTest {
+    private static final UUID UUID_CONST = UUID.randomUUID();
+    private static final String ADDRESS = "ADDRESS";
+    private static final String STRING = "STRING";
+
+    @Mock private android.bluetooth.BluetoothDevice mBluetoothDevice;
+    @Mock private android.bluetooth.BluetoothGatt mBluetoothGatt;
+    @Mock private android.bluetooth.BluetoothSocket mBluetoothSocket;
+    @Mock private android.bluetooth.BluetoothClass mBluetoothClass;
+
+    BluetoothDevice mTestabilityBluetoothDevice;
+    BluetoothGattCallback mTestBluetoothGattCallback;
+    Context mContext;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+        mTestabilityBluetoothDevice = BluetoothDevice.wrap(mBluetoothDevice);
+        mTestBluetoothGattCallback = new TestBluetoothGattCallback();
+        mContext = InstrumentationRegistry.getInstrumentation().getContext();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testWrapNonNullAdapter_isNotNull_unWrapSame() {
+        assertThat(mTestabilityBluetoothDevice).isNotNull();
+        assertThat(mTestabilityBluetoothDevice.unwrap()).isSameInstanceAs(mBluetoothDevice);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testEquality_asExpected() {
+        assertThat(mTestabilityBluetoothDevice.equals(null)).isFalse();
+        assertThat(mTestabilityBluetoothDevice.equals(mTestabilityBluetoothDevice)).isTrue();
+        assertThat(mTestabilityBluetoothDevice.equals(BluetoothDevice.wrap(mBluetoothDevice)))
+                .isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testHashCode_asExpected() {
+        assertThat(mTestabilityBluetoothDevice.hashCode())
+                .isEqualTo(BluetoothDevice.wrap(mBluetoothDevice).hashCode());
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testConnectGattWithThreeParameters_callsWrapped() {
+        when(mBluetoothDevice
+                .connectGatt(mContext, true, mTestBluetoothGattCallback.unwrap()))
+                .thenReturn(mBluetoothGatt);
+        assertThat(mTestabilityBluetoothDevice
+                .connectGatt(mContext, true, mTestBluetoothGattCallback)
+                .unwrap())
+                .isSameInstanceAs(mBluetoothGatt);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testConnectGattWithFourParameters_callsWrapped() {
+        when(mBluetoothDevice
+                .connectGatt(mContext, true, mTestBluetoothGattCallback.unwrap(), 1))
+                .thenReturn(mBluetoothGatt);
+        assertThat(mTestabilityBluetoothDevice
+                .connectGatt(mContext, true, mTestBluetoothGattCallback, 1)
+                .unwrap())
+                .isSameInstanceAs(mBluetoothGatt);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testCreateRfcommSocketToServiceRecord_callsWrapped() throws IOException {
+        when(mBluetoothDevice.createRfcommSocketToServiceRecord(UUID_CONST))
+                .thenReturn(mBluetoothSocket);
+        assertThat(mTestabilityBluetoothDevice.createRfcommSocketToServiceRecord(UUID_CONST))
+                .isSameInstanceAs(mBluetoothSocket);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testCreateInsecureRfcommSocketToServiceRecord_callsWrapped() throws IOException {
+        when(mBluetoothDevice.createInsecureRfcommSocketToServiceRecord(UUID_CONST))
+                .thenReturn(mBluetoothSocket);
+        assertThat(mTestabilityBluetoothDevice
+                .createInsecureRfcommSocketToServiceRecord(UUID_CONST))
+                .isSameInstanceAs(mBluetoothSocket);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testSetPairingConfirmation_callsWrapped() throws IOException {
+        when(mBluetoothDevice.setPairingConfirmation(true)).thenReturn(true);
+        assertThat(mTestabilityBluetoothDevice.setPairingConfirmation(true)).isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testFetchUuidsWithSdp_callsWrapped() throws IOException {
+        when(mBluetoothDevice.fetchUuidsWithSdp()).thenReturn(true);
+        assertThat(mTestabilityBluetoothDevice.fetchUuidsWithSdp()).isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testCreateBond_callsWrapped() throws IOException {
+        when(mBluetoothDevice.createBond()).thenReturn(true);
+        assertThat(mTestabilityBluetoothDevice.createBond()).isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGetUuids_callsWrapped() throws IOException {
+        when(mBluetoothDevice.getUuids()).thenReturn(null);
+        assertThat(mTestabilityBluetoothDevice.getUuids()).isNull();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGetBondState_callsWrapped() throws IOException {
+        when(mBluetoothDevice.getBondState()).thenReturn(1);
+        assertThat(mTestabilityBluetoothDevice.getBondState()).isEqualTo(1);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGetAddress_callsWrapped() throws IOException {
+        when(mBluetoothDevice.getAddress()).thenReturn(ADDRESS);
+        assertThat(mTestabilityBluetoothDevice.getAddress()).isSameInstanceAs(ADDRESS);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGetBluetoothClass_callsWrapped() throws IOException {
+        when(mBluetoothDevice.getBluetoothClass()).thenReturn(mBluetoothClass);
+        assertThat(mTestabilityBluetoothDevice.getBluetoothClass())
+                .isSameInstanceAs(mBluetoothClass);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGetType_callsWrapped() throws IOException {
+        when(mBluetoothDevice.getType()).thenReturn(1);
+        assertThat(mTestabilityBluetoothDevice.getType()).isEqualTo(1);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGetName_callsWrapped() throws IOException {
+        when(mBluetoothDevice.getName()).thenReturn(STRING);
+        assertThat(mTestabilityBluetoothDevice.getName()).isSameInstanceAs(STRING);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testToString_callsWrapped() {
+        when(mBluetoothDevice.toString()).thenReturn(STRING);
+        assertThat(mTestabilityBluetoothDevice.toString()).isSameInstanceAs(STRING);
+    }
+
+    private static class TestBluetoothGattCallback extends BluetoothGattCallback {}
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattCallbackTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattCallbackTest.java
new file mode 100644
index 0000000..26ae6d7
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattCallbackTest.java
@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.testability.android.bluetooth;
+
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+
+/**
+ * Unit tests for {@link BluetoothGattCallback}.
+ */
+@Presubmit
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class BluetoothGattCallbackTest {
+    @Mock private android.bluetooth.BluetoothGatt mBluetoothGatt;
+    @Mock private android.bluetooth.BluetoothGattCharacteristic mBluetoothGattCharacteristic;
+    @Mock private android.bluetooth.BluetoothGattDescriptor mBluetoothGattDescriptor;
+
+    TestBluetoothGattCallback mTestBluetoothGattCallback = new TestBluetoothGattCallback();
+
+    @Test
+    public void testOnConnectionStateChange_notCrash() {
+        mTestBluetoothGattCallback.unwrap()
+                .onConnectionStateChange(mBluetoothGatt, 1, 1);
+    }
+
+    @Test
+    public void testOnServiceDiscovered_notCrash() {
+        mTestBluetoothGattCallback.unwrap().onServicesDiscovered(mBluetoothGatt, 1);
+    }
+
+    @Test
+    public void testOnCharacteristicRead_notCrash() {
+        mTestBluetoothGattCallback.unwrap().onCharacteristicRead(mBluetoothGatt,
+                mBluetoothGattCharacteristic, 1);
+    }
+
+    @Test
+    public void testOnCharacteristicWrite_notCrash() {
+        mTestBluetoothGattCallback.unwrap().onCharacteristicWrite(mBluetoothGatt,
+                mBluetoothGattCharacteristic, 1);
+    }
+
+    @Test
+    public void testOnDescriptionRead_notCrash() {
+        mTestBluetoothGattCallback.unwrap().onDescriptorRead(mBluetoothGatt,
+                mBluetoothGattDescriptor, 1);
+    }
+
+    @Test
+    public void testOnDescriptionWrite_notCrash() {
+        mTestBluetoothGattCallback.unwrap().onDescriptorWrite(mBluetoothGatt,
+                mBluetoothGattDescriptor, 1);
+    }
+
+    @Test
+    public void testOnReadRemoteRssi_notCrash() {
+        mTestBluetoothGattCallback.unwrap().onReadRemoteRssi(mBluetoothGatt, 1, 1);
+    }
+
+    @Test
+    public void testOnReliableWriteCompleted_notCrash() {
+        mTestBluetoothGattCallback.unwrap().onReliableWriteCompleted(mBluetoothGatt, 1);
+    }
+
+    @Test
+    public void testOnMtuChanged_notCrash() {
+        mTestBluetoothGattCallback.unwrap().onMtuChanged(mBluetoothGatt, 1, 1);
+    }
+
+    @Test
+    public void testOnCharacteristicChanged_notCrash() {
+        mTestBluetoothGattCallback.unwrap()
+                .onCharacteristicChanged(mBluetoothGatt, mBluetoothGattCharacteristic);
+    }
+
+    private static class TestBluetoothGattCallback extends BluetoothGattCallback { }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattServerCallbackTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattServerCallbackTest.java
new file mode 100644
index 0000000..fb99317
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattServerCallbackTest.java
@@ -0,0 +1,121 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.testability.android.bluetooth;
+
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+
+/**
+ * Unit tests for {@link BluetoothGattServerCallback}.
+ */
+@Presubmit
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class BluetoothGattServerCallbackTest {
+    @Mock
+    private android.bluetooth.BluetoothDevice mBluetoothDevice;
+    @Mock
+    private android.bluetooth.BluetoothGattService mBluetoothGattService;
+    @Mock
+    private android.bluetooth.BluetoothGattCharacteristic mBluetoothGattCharacteristic;
+    @Mock
+    private android.bluetooth.BluetoothGattDescriptor mBluetoothGattDescriptor;
+
+    TestBluetoothGattServerCallback
+            mTestBluetoothGattServerCallback = new TestBluetoothGattServerCallback();
+
+    @Test
+    public void testOnCharacteristicReadRequest_notCrash() {
+        mTestBluetoothGattServerCallback.unwrap().onCharacteristicReadRequest(
+                mBluetoothDevice, 1, 1, mBluetoothGattCharacteristic);
+    }
+
+    @Test
+    public void testOnCharacteristicWriteRequest_notCrash() {
+        mTestBluetoothGattServerCallback.unwrap().onCharacteristicWriteRequest(
+                mBluetoothDevice,
+                1,
+                mBluetoothGattCharacteristic,
+                false,
+                true,
+                1,
+                new byte[]{1});
+    }
+
+    @Test
+    public void testOnConnectionStateChange_notCrash() {
+        mTestBluetoothGattServerCallback.unwrap().onConnectionStateChange(
+                mBluetoothDevice,
+                1,
+                2);
+    }
+
+    @Test
+    public void testOnDescriptorReadRequest_notCrash() {
+        mTestBluetoothGattServerCallback.unwrap().onDescriptorReadRequest(
+                mBluetoothDevice,
+                1,
+                2, mBluetoothGattDescriptor);
+    }
+
+    @Test
+    public void testOnDescriptorWriteRequest_notCrash() {
+        mTestBluetoothGattServerCallback.unwrap().onDescriptorWriteRequest(
+                mBluetoothDevice,
+                1,
+                mBluetoothGattDescriptor,
+                false,
+                true,
+                2,
+                new byte[]{1});
+    }
+
+    @Test
+    public void testOnExecuteWrite_notCrash() {
+        mTestBluetoothGattServerCallback.unwrap().onExecuteWrite(
+                mBluetoothDevice,
+                1,
+                false);
+    }
+
+    @Test
+    public void testOnMtuChanged_notCrash() {
+        mTestBluetoothGattServerCallback.unwrap().onMtuChanged(
+                mBluetoothDevice,
+                1);
+    }
+
+    @Test
+    public void testOnNotificationSent_notCrash() {
+        mTestBluetoothGattServerCallback.unwrap().onNotificationSent(
+                mBluetoothDevice,
+                1);
+    }
+
+    @Test
+    public void testOnServiceAdded_notCrash() {
+        mTestBluetoothGattServerCallback.unwrap().onServiceAdded(1, mBluetoothGattService);
+    }
+
+    private static class TestBluetoothGattServerCallback extends BluetoothGattServerCallback { }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattServerTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattServerTest.java
new file mode 100644
index 0000000..48283d1
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattServerTest.java
@@ -0,0 +1,149 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.testability.android.bluetooth;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.doNothing;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+import androidx.test.filters.SmallTest;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import java.util.UUID;
+
+/**
+ * Unit tests for {@link BluetoothGattServer}.
+ */
+@Presubmit
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class BluetoothGattServerTest {
+    private static final UUID UUID_CONST = UUID.randomUUID();
+    private static final byte[] BYTES = new byte[]{1, 2, 3};
+
+    @Mock private android.bluetooth.BluetoothDevice mBluetoothDevice;
+    @Mock private android.bluetooth.BluetoothGattServer mBluetoothGattServer;
+    @Mock private android.bluetooth.BluetoothGattService mBluetoothGattService;
+    @Mock private android.bluetooth.BluetoothGattCharacteristic mBluetoothGattCharacteristic;
+
+    BluetoothGattServer mTestabilityBluetoothGattServer;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+        mTestabilityBluetoothGattServer = BluetoothGattServer.wrap(mBluetoothGattServer);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testWrapNonNullAdapter_isNotNull_unWrapSame() {
+        assertThat(mTestabilityBluetoothGattServer).isNotNull();
+        assertThat(mTestabilityBluetoothGattServer.unwrap()).isSameInstanceAs(mBluetoothGattServer);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testConnect_callsWrapped() {
+        when(mBluetoothGattServer
+                .connect(mBluetoothDevice, true))
+                .thenReturn(true);
+        assertThat(mTestabilityBluetoothGattServer
+                .connect(BluetoothDevice.wrap(mBluetoothDevice), true))
+                .isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testAddService_callsWrapped() {
+        when(mBluetoothGattServer
+                .addService(mBluetoothGattService))
+                .thenReturn(true);
+        assertThat(mTestabilityBluetoothGattServer
+                .addService(mBluetoothGattService))
+                .isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testClearServices_callsWrapped() {
+        doNothing().when(mBluetoothGattServer).clearServices();
+        mTestabilityBluetoothGattServer.clearServices();
+        verify(mBluetoothGattServer).clearServices();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testClose_callsWrapped() {
+        doNothing().when(mBluetoothGattServer).close();
+        mTestabilityBluetoothGattServer.close();
+        verify(mBluetoothGattServer).close();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testNotifyCharacteristicChanged_callsWrapped() {
+        when(mBluetoothGattServer
+                .notifyCharacteristicChanged(
+                        mBluetoothDevice,
+                        mBluetoothGattCharacteristic,
+                        true))
+                .thenReturn(true);
+        assertThat(mTestabilityBluetoothGattServer
+                .notifyCharacteristicChanged(
+                        BluetoothDevice.wrap(mBluetoothDevice),
+                        mBluetoothGattCharacteristic,
+                        true))
+                .isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testSendResponse_callsWrapped() {
+        when(mBluetoothGattServer.sendResponse(
+                mBluetoothDevice, 1, 1, 1, BYTES)).thenReturn(true);
+        mTestabilityBluetoothGattServer.sendResponse(
+                BluetoothDevice.wrap(mBluetoothDevice), 1, 1, 1, BYTES);
+        verify(mBluetoothGattServer).sendResponse(
+                mBluetoothDevice, 1, 1, 1, BYTES);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testCancelConnection_callsWrapped() {
+        doNothing().when(mBluetoothGattServer).cancelConnection(mBluetoothDevice);
+        mTestabilityBluetoothGattServer.cancelConnection(BluetoothDevice.wrap(mBluetoothDevice));
+        verify(mBluetoothGattServer).cancelConnection(mBluetoothDevice);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGetService_callsWrapped() {
+        when(mBluetoothGattServer.getService(UUID_CONST)).thenReturn(null);
+        assertThat(mTestabilityBluetoothGattServer.getService(UUID_CONST)).isNull();
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattWrapperTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattWrapperTest.java
new file mode 100644
index 0000000..a03a255
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattWrapperTest.java
@@ -0,0 +1,190 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.testability.android.bluetooth;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.doNothing;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+import androidx.test.filters.SmallTest;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import java.util.UUID;
+
+/**
+ * Unit tests for {@link BluetoothGattWrapper}.
+ */
+@Presubmit
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class BluetoothGattWrapperTest {
+    private static final UUID UUID_CONST = UUID.randomUUID();
+    private static final byte[] BYTES = new byte[]{1, 2, 3};
+
+    @Mock private android.bluetooth.BluetoothDevice mBluetoothDevice;
+    @Mock private android.bluetooth.BluetoothGatt mBluetoothGatt;
+    @Mock private android.bluetooth.BluetoothGattService mBluetoothGattService;
+    @Mock private android.bluetooth.BluetoothGattCharacteristic mBluetoothGattCharacteristic;
+    @Mock private android.bluetooth.BluetoothGattDescriptor mBluetoothGattDescriptor;
+
+    BluetoothGattWrapper mBluetoothGattWrapper;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+        mBluetoothGattWrapper = BluetoothGattWrapper.wrap(mBluetoothGatt);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testWrapNonNullAdapter_isNotNull_unWrapSame() {
+        assertThat(mBluetoothGattWrapper).isNotNull();
+        assertThat(mBluetoothGattWrapper.unwrap()).isSameInstanceAs(mBluetoothGatt);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testEquality_asExpected() {
+        assertThat(mBluetoothGattWrapper.equals(null)).isFalse();
+        assertThat(mBluetoothGattWrapper.equals(mBluetoothGattWrapper)).isTrue();
+        assertThat(mBluetoothGattWrapper.equals(BluetoothGattWrapper.wrap(mBluetoothGatt)))
+                .isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGetDevice_callsWrapped() {
+        when(mBluetoothGatt.getDevice()).thenReturn(mBluetoothDevice);
+        assertThat(mBluetoothGattWrapper.getDevice().unwrap()).isSameInstanceAs(mBluetoothDevice);
+    }
+
+    @Test
+    public void testHashCode_asExpected() {
+        assertThat(mBluetoothGattWrapper.hashCode())
+                .isEqualTo(BluetoothGattWrapper.wrap(mBluetoothGatt).hashCode());
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGetServices_callsWrapped() {
+        when(mBluetoothGatt.getServices()).thenReturn(null);
+        assertThat(mBluetoothGattWrapper.getServices()).isNull();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGetService_callsWrapped() {
+        when(mBluetoothGatt.getService(UUID_CONST)).thenReturn(mBluetoothGattService);
+        assertThat(mBluetoothGattWrapper.getService(UUID_CONST))
+                .isSameInstanceAs(mBluetoothGattService);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testDiscoverServices_callsWrapped() {
+        when(mBluetoothGatt.discoverServices()).thenReturn(true);
+        assertThat(mBluetoothGattWrapper.discoverServices()).isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testReadCharacteristic_callsWrapped() {
+        when(mBluetoothGatt.readCharacteristic(mBluetoothGattCharacteristic)).thenReturn(true);
+        assertThat(mBluetoothGattWrapper.readCharacteristic(mBluetoothGattCharacteristic)).isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testWriteCharacteristic_callsWrapped() {
+        when(mBluetoothGatt.writeCharacteristic(mBluetoothGattCharacteristic, BYTES, 1))
+                .thenReturn(1);
+        assertThat(mBluetoothGattWrapper.writeCharacteristic(
+                mBluetoothGattCharacteristic, BYTES, 1)).isEqualTo(1);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testReadDescriptor_callsWrapped() {
+        when(mBluetoothGatt.readDescriptor(mBluetoothGattDescriptor)).thenReturn(false);
+        assertThat(mBluetoothGattWrapper.readDescriptor(mBluetoothGattDescriptor)).isFalse();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testWriteDescriptor_callsWrapped() {
+        when(mBluetoothGatt.writeDescriptor(mBluetoothGattDescriptor, BYTES)).thenReturn(5);
+        assertThat(mBluetoothGattWrapper.writeDescriptor(mBluetoothGattDescriptor, BYTES))
+                .isEqualTo(5);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testReadRemoteRssi_callsWrapped() {
+        when(mBluetoothGatt.readRemoteRssi()).thenReturn(false);
+        assertThat(mBluetoothGattWrapper.readRemoteRssi()).isFalse();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testRequestConnectionPriority_callsWrapped() {
+        when(mBluetoothGatt.requestConnectionPriority(5)).thenReturn(false);
+        assertThat(mBluetoothGattWrapper.requestConnectionPriority(5)).isFalse();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testRequestMtu_callsWrapped() {
+        when(mBluetoothGatt.requestMtu(5)).thenReturn(false);
+        assertThat(mBluetoothGattWrapper.requestMtu(5)).isFalse();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testSetCharacteristicNotification_callsWrapped() {
+        when(mBluetoothGatt.setCharacteristicNotification(mBluetoothGattCharacteristic, true))
+                .thenReturn(false);
+        assertThat(mBluetoothGattWrapper
+                .setCharacteristicNotification(mBluetoothGattCharacteristic, true)).isFalse();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testDisconnect_callsWrapped() {
+        doNothing().when(mBluetoothGatt).disconnect();
+        mBluetoothGattWrapper.disconnect();
+        verify(mBluetoothGatt).disconnect();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testClose_callsWrapped() {
+        doNothing().when(mBluetoothGatt).close();
+        mBluetoothGattWrapper.close();
+        verify(mBluetoothGatt).close();
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/BluetoothAdvertiserTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/BluetoothAdvertiserTest.java
new file mode 100644
index 0000000..8468ed1
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/BluetoothAdvertiserTest.java
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.testability.android.bluetooth.le;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.doNothing;
+import static org.mockito.Mockito.verify;
+
+import android.bluetooth.le.AdvertiseCallback;
+import android.bluetooth.le.AdvertiseData;
+import android.bluetooth.le.AdvertiseSettings;
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+import androidx.test.filters.SmallTest;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+/**
+ * Unit tests for {@link BluetoothLeAdvertiser}.
+ */
+@Presubmit
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class BluetoothAdvertiserTest {
+    @Mock android.bluetooth.le.BluetoothLeAdvertiser mWrappedBluetoothLeAdvertiser;
+    @Mock AdvertiseSettings mAdvertiseSettings;
+    @Mock AdvertiseData mAdvertiseData;
+    @Mock AdvertiseCallback mAdvertiseCallback;
+
+    BluetoothLeAdvertiser mBluetoothLeAdvertiser;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+        mBluetoothLeAdvertiser = BluetoothLeAdvertiser.wrap(mWrappedBluetoothLeAdvertiser);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testWrapNullAdapter_isNull() {
+        assertThat(BluetoothLeAdvertiser.wrap(null)).isNull();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testWrapNonNullAdapter_isNotNull_unWrapSame() {
+        assertThat(mWrappedBluetoothLeAdvertiser).isNotNull();
+        assertThat(mBluetoothLeAdvertiser.unwrap()).isSameInstanceAs(mWrappedBluetoothLeAdvertiser);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testStartAdvertisingThreeParameters_callsWrapped() {
+        doNothing().when(mWrappedBluetoothLeAdvertiser)
+                .startAdvertising(mAdvertiseSettings, mAdvertiseData, mAdvertiseCallback);
+        mBluetoothLeAdvertiser
+                .startAdvertising(mAdvertiseSettings, mAdvertiseData, mAdvertiseCallback);
+        verify(mWrappedBluetoothLeAdvertiser).startAdvertising(
+                mAdvertiseSettings, mAdvertiseData, mAdvertiseCallback);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testStartAdvertisingFourParameters_callsWrapped() {
+        doNothing().when(mWrappedBluetoothLeAdvertiser).startAdvertising(
+                mAdvertiseSettings, mAdvertiseData, mAdvertiseData, mAdvertiseCallback);
+        mBluetoothLeAdvertiser.startAdvertising(
+                mAdvertiseSettings, mAdvertiseData, mAdvertiseData, mAdvertiseCallback);
+        verify(mWrappedBluetoothLeAdvertiser).startAdvertising(
+                mAdvertiseSettings, mAdvertiseData, mAdvertiseData, mAdvertiseCallback);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testStopAdvertising_callsWrapped() {
+        doNothing().when(mWrappedBluetoothLeAdvertiser).stopAdvertising(mAdvertiseCallback);
+        mBluetoothLeAdvertiser.stopAdvertising(mAdvertiseCallback);
+        verify(mWrappedBluetoothLeAdvertiser).stopAdvertising(mAdvertiseCallback);
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/BluetoothLeScannerTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/BluetoothLeScannerTest.java
new file mode 100644
index 0000000..3fce54f
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/BluetoothLeScannerTest.java
@@ -0,0 +1,123 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.testability.android.bluetooth.le;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.doNothing;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.app.PendingIntent;
+import android.bluetooth.le.ScanFilter;
+import android.bluetooth.le.ScanSettings;
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+import androidx.test.filters.SmallTest;
+
+import com.google.common.collect.ImmutableList;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+/**
+ * Unit tests for {@link BluetoothLeScanner}.
+ */
+@Presubmit
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class BluetoothLeScannerTest {
+    @Mock android.bluetooth.le.BluetoothLeScanner mWrappedBluetoothLeScanner;
+    @Mock PendingIntent mPendingIntent;
+    @Mock ScanSettings mScanSettings;
+    @Mock ScanFilter mScanFilter;
+
+    TestScanCallback mTestScanCallback = new TestScanCallback();
+    BluetoothLeScanner mBluetoothLeScanner;
+    ImmutableList<ScanFilter> mImmutableScanFilterList;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+        mBluetoothLeScanner = BluetoothLeScanner.wrap(mWrappedBluetoothLeScanner);
+        mImmutableScanFilterList = ImmutableList.of(mScanFilter);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testWrapNullAdapter_isNull() {
+        assertThat(BluetoothLeAdvertiser.wrap(null)).isNull();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testWrapNonNullAdapter_isNotNull_unWrapSame() {
+        assertThat(mWrappedBluetoothLeScanner).isNotNull();
+        assertThat(mBluetoothLeScanner.unwrap()).isSameInstanceAs(mWrappedBluetoothLeScanner);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testStartScan_callsWrapped() {
+        doNothing().when(mWrappedBluetoothLeScanner).startScan(mTestScanCallback.unwrap());
+        mBluetoothLeScanner.startScan(mTestScanCallback);
+        verify(mWrappedBluetoothLeScanner).startScan(mTestScanCallback.unwrap());
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testStartScanWithFiltersCallback_callsWrapped() {
+        doNothing().when(mWrappedBluetoothLeScanner)
+                .startScan(mImmutableScanFilterList, mScanSettings, mTestScanCallback.unwrap());
+        mBluetoothLeScanner.startScan(mImmutableScanFilterList, mScanSettings, mTestScanCallback);
+        verify(mWrappedBluetoothLeScanner)
+                .startScan(mImmutableScanFilterList, mScanSettings, mTestScanCallback.unwrap());
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testStartScanWithFiltersCallbackIntent_callsWrapped() {
+        when(mWrappedBluetoothLeScanner.startScan(
+                mImmutableScanFilterList, mScanSettings, mPendingIntent)).thenReturn(1);
+        mBluetoothLeScanner.startScan(mImmutableScanFilterList, mScanSettings, mPendingIntent);
+        verify(mWrappedBluetoothLeScanner)
+                .startScan(mImmutableScanFilterList, mScanSettings, mPendingIntent);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testStopScan_callsWrapped() {
+        doNothing().when(mWrappedBluetoothLeScanner).stopScan(mTestScanCallback.unwrap());
+        mBluetoothLeScanner.stopScan(mTestScanCallback);
+        verify(mWrappedBluetoothLeScanner).stopScan(mTestScanCallback.unwrap());
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testStopScanPendingIntent_callsWrapped() {
+        doNothing().when(mWrappedBluetoothLeScanner).stopScan(mPendingIntent);
+        mBluetoothLeScanner.stopScan(mPendingIntent);
+        verify(mWrappedBluetoothLeScanner).stopScan(mPendingIntent);
+    }
+
+    private static class TestScanCallback extends ScanCallback {};
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/ScanCallbackTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/ScanCallbackTest.java
new file mode 100644
index 0000000..6d68486
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/ScanCallbackTest.java
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.testability.android.bluetooth.le;
+
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+
+import com.google.common.collect.ImmutableList;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+/**
+ * Unit tests for {@link ScanCallback}.
+ */
+@Presubmit
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class ScanCallbackTest {
+    @Mock android.bluetooth.le.ScanResult mScanResult;
+
+    TestScanCallback mTestScanCallback = new TestScanCallback();
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+    }
+
+    @Test
+    public void testOnScanFailed_notCrash() {
+        mTestScanCallback.unwrap().onScanFailed(1);
+    }
+
+    @Test
+    public void testOnScanResult_notCrash() {
+        mTestScanCallback.unwrap().onScanResult(1, mScanResult);
+    }
+
+    @Test
+    public void testOnBatchScanResult_notCrash() {
+        mTestScanCallback.unwrap().onBatchScanResults(ImmutableList.of(mScanResult));
+    }
+
+    private static class TestScanCallback extends ScanCallback { }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/ScanResultTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/ScanResultTest.java
new file mode 100644
index 0000000..255c178
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/ScanResultTest.java
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.testability.android.bluetooth.le;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.when;
+
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+/**
+ * Unit tests for {@link ScanResult}.
+ */
+@Presubmit
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class ScanResultTest {
+
+    @Mock android.bluetooth.le.ScanResult mWrappedScanResult;
+    @Mock android.bluetooth.le.ScanRecord mScanRecord;
+    @Mock android.bluetooth.BluetoothDevice mBluetoothDevice;
+    ScanResult mScanResult;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+        mScanResult = ScanResult.wrap(mWrappedScanResult);
+    }
+
+    @Test
+    public void testGetScanRecord_calledWrapped() {
+        when(mWrappedScanResult.getScanRecord()).thenReturn(mScanRecord);
+        assertThat(mScanResult.getScanRecord()).isSameInstanceAs(mScanRecord);
+    }
+
+    @Test
+    public void testGetRssi_calledWrapped() {
+        when(mWrappedScanResult.getRssi()).thenReturn(3);
+        assertThat(mScanResult.getRssi()).isEqualTo(3);
+    }
+
+    @Test
+    public void testGetTimestampNanos_calledWrapped() {
+        when(mWrappedScanResult.getTimestampNanos()).thenReturn(4L);
+        assertThat(mScanResult.getTimestampNanos()).isEqualTo(4L);
+    }
+
+    @Test
+    public void testGetDevice_calledWrapped() {
+        when(mWrappedScanResult.getDevice()).thenReturn(mBluetoothDevice);
+        assertThat(mScanResult.getDevice().unwrap()).isSameInstanceAs(mBluetoothDevice);
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/util/BluetoothGattUtilsTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/util/BluetoothGattUtilsTest.java
index 47182c3..7535c06 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/util/BluetoothGattUtilsTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/util/BluetoothGattUtilsTest.java
@@ -34,14 +34,12 @@
 
 import java.lang.reflect.Field;
 import java.lang.reflect.Modifier;
-import java.util.UUID;
 
 /** Unit tests for {@link BluetoothGattUtils}. */
 @Presubmit
 @SmallTest
 @RunWith(AndroidJUnit4.class)
 public class BluetoothGattUtilsTest {
-    private static final UUID TEST_UUID = UUID.randomUUID();
     private static final ImmutableSet<String> GATT_HIDDEN_CONSTANTS = ImmutableSet.of(
             "GATT_WRITE_REQUEST_BUSY", "GATT_WRITE_REQUEST_FAIL", "GATT_WRITE_REQUEST_SUCCESS");
 
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/eventloop/EventLoopTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/eventloop/EventLoopTest.java
index 70dcec8..bebb2f2 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/common/eventloop/EventLoopTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/eventloop/EventLoopTest.java
@@ -36,7 +36,6 @@
     @Rule
     public ExpectedException thrown = ExpectedException.none();
 
-    /*
     @Test
     public void remove() {
         mEventLoop.postRunnable(new NumberedRunnable(0));
@@ -44,10 +43,8 @@
         mEventLoop.postRunnable(runnableToAddAndRemove);
         mEventLoop.removeRunnable(runnableToAddAndRemove);
         mEventLoop.postRunnable(new NumberedRunnable(2));
-
-        assertThat(mExecutedRunnables).containsExactly(0, 2);
+        assertThat(mExecutedRunnables).doesNotContain(1);
     }
-    */
 
     @Test
     @SdkSuppress(minSdkVersion = 32, codeName = "T")
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/eventloop/HandlerEventLoopImplTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/eventloop/HandlerEventLoopImplTest.java
new file mode 100644
index 0000000..4775456
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/eventloop/HandlerEventLoopImplTest.java
@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.eventloop;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import androidx.test.filters.SdkSuppress;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class HandlerEventLoopImplTest {
+    private static final String TAG = "HandlerEventLoopImplTest";
+    private final HandlerEventLoopImpl mHandlerEventLoopImpl =
+            new HandlerEventLoopImpl(TAG);
+    private final List<Integer> mExecutedRunnables = new ArrayList<>();
+    @Rule
+    public ExpectedException thrown = ExpectedException.none();
+
+    @Test
+    public void remove() {
+        mHandlerEventLoopImpl.postRunnable(new NumberedRunnable(0));
+        NumberedRunnable runnableToAddAndRemove = new NumberedRunnable(1);
+        mHandlerEventLoopImpl.postRunnable(runnableToAddAndRemove);
+        mHandlerEventLoopImpl.removeRunnable(runnableToAddAndRemove);
+        mHandlerEventLoopImpl.postRunnable(new NumberedRunnable(2));
+        assertThat(mExecutedRunnables).doesNotContain(1);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void isPosted() {
+        NumberedRunnable runnable = new HandlerEventLoopImplTest.NumberedRunnable(0);
+        mHandlerEventLoopImpl.postRunnableDelayed(runnable, 10 * 1000L);
+        assertThat(mHandlerEventLoopImpl.isPosted(runnable)).isTrue();
+        mHandlerEventLoopImpl.removeRunnable(runnable);
+        assertThat(mHandlerEventLoopImpl.isPosted(runnable)).isFalse();
+
+        // Let a runnable execute, then verify that it's not posted.
+        mHandlerEventLoopImpl.postRunnable(runnable);
+        assertThat(mHandlerEventLoopImpl.isPosted(runnable)).isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void postAndWaitAfterDestroy() throws InterruptedException {
+        mHandlerEventLoopImpl.destroy();
+        mHandlerEventLoopImpl.postAndWait(new HandlerEventLoopImplTest.NumberedRunnable(0));
+        assertThat(mExecutedRunnables).isEmpty();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void postEmptyQueueRunnable() {
+        mHandlerEventLoopImpl.postEmptyQueueRunnable(
+                new HandlerEventLoopImplTest.NumberedRunnable(0));
+    }
+
+    private class NumberedRunnable extends NamedRunnable {
+        private final int mId;
+
+        private NumberedRunnable(int id) {
+            super("NumberedRunnable:" + id);
+            this.mId = id;
+        }
+
+        @Override
+        public void run() {
+            // Note: when running in robolectric, this is not actually executed on a different
+            // thread, it's executed in the same thread the test runs in, so this is safe.
+            mExecutedRunnables.add(mId);
+        }
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/eventloop/NamedRunnableTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/eventloop/NamedRunnableTest.java
new file mode 100644
index 0000000..7005da1
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/eventloop/NamedRunnableTest.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.eventloop;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import org.junit.Test;
+
+public class NamedRunnableTest {
+    private static final String TAG = "NamedRunnableTest";
+
+    @Test
+    public void testToString() {
+        assertThat(mNamedRunnable.toString()).isEqualTo("Runnable[" + TAG +  "]");
+    }
+
+    private final NamedRunnable mNamedRunnable = new NamedRunnable(TAG) {
+        @Override
+        public void run() {
+        }
+    };
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/fastpair/IconUtilsTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/fastpair/IconUtilsTest.java
new file mode 100644
index 0000000..d39d9cc
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/fastpair/IconUtilsTest.java
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.fastpair;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+
+import org.junit.Test;
+import org.mockito.Mock;
+
+public class IconUtilsTest {
+    private static final int MIN_ICON_SIZE = 16;
+    private static final int DESIRED_ICON_SIZE = 32;
+    @Mock
+    Context mContext;
+
+    @Test
+    public void isIconSizedCorrectly() {
+        // Null bitmap is not sized correctly
+        assertThat(IconUtils.isIconSizeCorrect(null)).isFalse();
+
+        int minIconSize = MIN_ICON_SIZE;
+        int desiredIconSize = DESIRED_ICON_SIZE;
+
+        // Bitmap that is 1x1 pixels is not sized correctly
+        Bitmap icon = Bitmap.createBitmap(1, 1, Bitmap.Config.ALPHA_8);
+        assertThat(IconUtils.isIconSizeCorrect(icon)).isFalse();
+
+        // Bitmap is categorized as small, and not regular
+        icon = Bitmap.createBitmap(minIconSize + 1,
+                minIconSize + 1, Bitmap.Config.ALPHA_8);
+        assertThat(IconUtils.isIconSizeCorrect(icon)).isTrue();
+        assertThat(IconUtils.isIconSizedSmall(icon)).isTrue();
+        assertThat(IconUtils.isIconSizedRegular(icon)).isFalse();
+
+        // Bitmap is categorized as regular, but not small
+        icon = Bitmap.createBitmap(desiredIconSize + 1,
+                desiredIconSize + 1, Bitmap.Config.ALPHA_8);
+        assertThat(IconUtils.isIconSizeCorrect(icon)).isTrue();
+        assertThat(IconUtils.isIconSizedSmall(icon)).isFalse();
+        assertThat(IconUtils.isIconSizedRegular(icon)).isTrue();
+    }
+
+    @Test
+    public void testAddWhiteCircleBackground() {
+        int minIconSize = MIN_ICON_SIZE;
+        Bitmap icon = Bitmap.createBitmap(minIconSize + 1, minIconSize + 1,
+                Bitmap.Config.ALPHA_8);
+
+        assertThat(
+                IconUtils.isIconSizeCorrect(IconUtils.addWhiteCircleBackground(mContext, icon)))
+                .isTrue();
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/locator/LocatorTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/locator/LocatorTest.java
new file mode 100644
index 0000000..c3a4e55
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/locator/LocatorTest.java
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.locator;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import androidx.test.core.app.ApplicationProvider;
+
+import com.android.server.nearby.common.eventloop.EventLoop;
+import com.android.server.nearby.fastpair.FastPairAdvHandler;
+import com.android.server.nearby.fastpair.FastPairModule;
+import com.android.server.nearby.fastpair.cache.FastPairCacheManager;
+import com.android.server.nearby.fastpair.footprint.FootprintsDeviceManager;
+import com.android.server.nearby.fastpair.halfsheet.FastPairHalfSheetManager;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.MockitoAnnotations;
+
+import java.time.Clock;
+
+import src.com.android.server.nearby.fastpair.testing.MockingLocator;
+
+public class LocatorTest {
+    private Locator mLocator;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        mLocator = src.com.android.server.nearby.fastpair.testing.MockingLocator.withMocksOnly(
+                ApplicationProvider.getApplicationContext());
+        mLocator.bind(new FastPairModule());
+    }
+
+    @Test
+    public void genericConstructor() {
+        assertThat(mLocator.get(FastPairCacheManager.class)).isNotNull();
+        assertThat(mLocator.get(FootprintsDeviceManager.class)).isNotNull();
+        assertThat(mLocator.get(EventLoop.class)).isNotNull();
+        assertThat(mLocator.get(FastPairHalfSheetManager.class)).isNotNull();
+        assertThat(mLocator.get(FastPairAdvHandler.class)).isNotNull();
+        assertThat(mLocator.get(Clock.class)).isNotNull();
+    }
+
+    @Test
+    public void genericDestroy() {
+        mLocator.destroy();
+    }
+
+    @Test
+    public void getOptional() {
+        assertThat(mLocator.getOptional(FastPairModule.class)).isNotNull();
+        mLocator.removeBindingForTest(FastPairModule.class);
+        assertThat(mLocator.getOptional(FastPairModule.class)).isNull();
+    }
+
+    @Test
+    public void getParent() {
+        assertThat(mLocator.getParent()).isNotNull();
+    }
+
+    @Test
+    public void getUnboundErrorMessage() {
+        assertThat(mLocator.getUnboundErrorMessage(FastPairModule.class))
+                .isEqualTo(
+                        "Unbound type: com.android.server.nearby.fastpair.FastPairModule\n"
+                        + "Searched locators:\n" + "android.app.Application ->\n"
+                                + "android.app.Application ->\n" + "android.app.Application");
+    }
+
+    @Test
+    public void getContextForTest() {
+        src.com.android.server.nearby.fastpair.testing.MockingLocator  mockingLocator =
+                new MockingLocator(ApplicationProvider.getApplicationContext(), mLocator);
+        assertThat(mockingLocator.getContextForTest()).isNotNull();
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/servicemonitor/PackageWatcherTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/servicemonitor/PackageWatcherTest.java
new file mode 100644
index 0000000..eafc7db
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/servicemonitor/PackageWatcherTest.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.servicemonitor;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.content.Intent;
+
+import androidx.test.core.app.ApplicationProvider;
+
+import org.junit.Test;
+
+public class PackageWatcherTest {
+    private PackageWatcher mPackageWatcher = new PackageWatcher() {
+        @Override
+        public void onSomePackagesChanged() {
+        }
+    };
+
+    @Test
+    public void getPackageName() {
+        Intent intent = new Intent("Action", null);
+        assertThat(mPackageWatcher.getPackageName(intent)).isNull();
+    }
+
+    @Test
+    public void onReceive() {
+        Intent intent = new Intent(Intent.ACTION_PACKAGES_UNSUSPENDED, null);
+        mPackageWatcher.onReceive(ApplicationProvider.getApplicationContext(), intent);
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/fastpair/FastPairAdvHandlerTest.java b/nearby/tests/unit/src/com/android/server/nearby/fastpair/FastPairAdvHandlerTest.java
index 346a961..39ea5a9 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/fastpair/FastPairAdvHandlerTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/fastpair/FastPairAdvHandlerTest.java
@@ -16,6 +16,8 @@
 
 package com.android.server.nearby.fastpair;
 
+import static com.google.common.truth.Truth.assertThat;
+
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.verify;
@@ -24,16 +26,22 @@
 import android.content.Context;
 import android.nearby.FastPairDevice;
 
+import com.android.server.nearby.common.bloomfilter.BloomFilter;
 import com.android.server.nearby.common.locator.LocatorContextWrapper;
 import com.android.server.nearby.fastpair.halfsheet.FastPairHalfSheetManager;
 import com.android.server.nearby.fastpair.notification.FastPairNotificationManager;
 import com.android.server.nearby.provider.FastPairDataProvider;
 
+import com.google.common.collect.ImmutableList;
+import com.google.protobuf.ByteString;
+
 import org.junit.Before;
 import org.junit.Test;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 
+import service.proto.Cache;
+import service.proto.Data;
 import service.proto.Rpcs;
 
 public class FastPairAdvHandlerTest {
@@ -45,11 +53,21 @@
     private FastPairHalfSheetManager mFastPairHalfSheetManager;
     @Mock
     private FastPairNotificationManager mFastPairNotificationManager;
+    @Mock
+    private BloomFilter mBloomFilter;
+    @Mock
+    Cache.StoredDiscoveryItem mStoredDiscoveryItem;
+    @Mock
+    Cache.StoredFastPairItem mStoredFastPairItem;
+    @Mock
+    Data.FastPairDeviceWithAccountKey mFastPairDeviceWithAccountKey;
+    private static final byte[] ACCOUNT_KEY = new byte[] {0, 1, 2};
     private static final String BLUETOOTH_ADDRESS = "AA:BB:CC:DD";
     private static final int CLOSE_RSSI = -80;
     private static final int FAR_AWAY_RSSI = -120;
     private static final int TX_POWER = -70;
     private static final byte[] INITIAL_BYTE_ARRAY = new byte[]{0x01, 0x02, 0x03};
+    private static final byte[] SALT = new byte[]{0x01};
 
     LocatorContextWrapper mLocatorContextWrapper;
     FastPairAdvHandler mFastPairAdvHandler;
@@ -99,7 +117,7 @@
     }
 
     @Test
-    public void testSubsequentBroadcast() {
+    public void testSubsequentBroadcast_notShowHalfSheet() {
         byte[] fastPairRecordWithBloomFilter =
                 new byte[]{
                         (byte) 0x02,
@@ -132,4 +150,44 @@
 
         verify(mFastPairHalfSheetManager, never()).showHalfSheet(any());
     }
+
+    @Test
+    public void testFindRecognizedDevice_bloomFilterNotContains_notFound() {
+        when(mFastPairDeviceWithAccountKey.getAccountKey())
+                .thenReturn(ByteString.copyFrom(ACCOUNT_KEY), ByteString.copyFrom(ACCOUNT_KEY));
+        when(mBloomFilter.possiblyContains(any(byte[].class))).thenReturn(false);
+
+        assertThat(FastPairAdvHandler.findRecognizedDevice(
+                ImmutableList.of(mFastPairDeviceWithAccountKey), mBloomFilter, SALT)).isNull();
+    }
+
+    @Test
+    public void testFindRecognizedDevice_bloomFilterContains_found() {
+        when(mFastPairDeviceWithAccountKey.getAccountKey())
+                .thenReturn(ByteString.copyFrom(ACCOUNT_KEY), ByteString.copyFrom(ACCOUNT_KEY));
+        when(mBloomFilter.possiblyContains(any(byte[].class))).thenReturn(true);
+
+        assertThat(FastPairAdvHandler.findRecognizedDevice(
+                ImmutableList.of(mFastPairDeviceWithAccountKey), mBloomFilter, SALT)).isNotNull();
+    }
+
+    @Test
+    public void testFindRecognizedDeviceFromCachedItem_bloomFilterNotContains_notFound() {
+        when(mStoredFastPairItem.getAccountKey())
+                .thenReturn(ByteString.copyFrom(ACCOUNT_KEY), ByteString.copyFrom(ACCOUNT_KEY));
+        when(mBloomFilter.possiblyContains(any(byte[].class))).thenReturn(false);
+
+        assertThat(FastPairAdvHandler.findRecognizedDeviceFromCachedItem(
+                ImmutableList.of(mStoredFastPairItem), mBloomFilter, SALT)).isNull();
+    }
+
+    @Test
+    public void testFindRecognizedDeviceFromCachedItem_bloomFilterContains_found() {
+        when(mStoredFastPairItem.getAccountKey())
+                .thenReturn(ByteString.copyFrom(ACCOUNT_KEY), ByteString.copyFrom(ACCOUNT_KEY));
+        when(mBloomFilter.possiblyContains(any(byte[].class))).thenReturn(true);
+
+        assertThat(FastPairAdvHandler.findRecognizedDeviceFromCachedItem(
+                ImmutableList.of(mStoredFastPairItem), mBloomFilter, SALT)).isNotNull();
+    }
 }
diff --git a/nearby/tests/unit/src/com/android/server/nearby/fastpair/FlagUtilsTest.java b/nearby/tests/unit/src/com/android/server/nearby/fastpair/FlagUtilsTest.java
new file mode 100644
index 0000000..9cf65f4
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/fastpair/FlagUtilsTest.java
@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair;
+
+import org.junit.Test;
+
+public class FlagUtilsTest {
+
+    @Test
+    public void testGetPreferencesBuilder_notCrash() {
+        FlagUtils.getPreferencesBuilder().build();
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/fastpair/cache/DiscoveryItemTest.java b/nearby/tests/unit/src/com/android/server/nearby/fastpair/cache/DiscoveryItemTest.java
new file mode 100644
index 0000000..5d4ea22
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/fastpair/cache/DiscoveryItemTest.java
@@ -0,0 +1,234 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair.cache;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+
+import androidx.test.platform.app.InstrumentationRegistry;
+
+import com.android.server.nearby.common.locator.LocatorContextWrapper;
+import com.android.server.nearby.fastpair.FastPairManager;
+import com.android.server.nearby.fastpair.testing.FakeDiscoveryItems;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import service.proto.Cache;
+
+/** Unit tests for {@link DiscoveryItem} */
+public class DiscoveryItemTest {
+    private static final String DEFAULT_MAC_ADDRESS = "00:11:22:33:44:55";
+    private static final String DEFAULT_DESCRIPITON = "description";
+    private static final long DEFAULT_TIMESTAMP = 1000000000L;
+    private static final String DEFAULT_TITLE = "title";
+    private static final String APP_NAME = "app_name";
+    private static final String ACTION_URL =
+            "intent:#Intent;action=com.android.server.nearby:ACTION_FAST_PAIR;"
+            + "package=com.google.android.gms;"
+            + "component=com.google.android.gms/"
+            + ".nearby.discovery.service.DiscoveryService;end";
+    private static final String DISPLAY_URL = "DISPLAY_URL";
+    private static final String TRIGGER_ID = "trigger.id";
+    private static final String FAST_PAIR_ID = "id";
+    private static final int RSSI = -80;
+    private static final int TX_POWER = -10;
+
+    @Mock private Context mContext;
+    private LocatorContextWrapper mLocatorContextWrapper;
+    private FastPairCacheManager mFastPairCacheManager;
+    private FastPairManager mFastPairManager;
+    private DiscoveryItem mDiscoveryItem;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+        mLocatorContextWrapper = new LocatorContextWrapper(mContext);
+        mFastPairManager = new FastPairManager(mLocatorContextWrapper);
+        mFastPairCacheManager = mLocatorContextWrapper.getLocator().get(FastPairCacheManager.class);
+        when(mContext.getContentResolver()).thenReturn(
+                InstrumentationRegistry.getInstrumentation().getContext().getContentResolver());
+        mDiscoveryItem =
+                FakeDiscoveryItems.newFastPairDiscoveryItem(mLocatorContextWrapper);
+    }
+
+    @Test
+    public void testMultipleFields() {
+        assertThat(mDiscoveryItem.getId()).isEqualTo(FAST_PAIR_ID);
+        assertThat(mDiscoveryItem.getDescription()).isEqualTo(DEFAULT_DESCRIPITON);
+        assertThat(mDiscoveryItem.getDisplayUrl()).isEqualTo(DISPLAY_URL);
+        assertThat(mDiscoveryItem.getTriggerId()).isEqualTo(TRIGGER_ID);
+        assertThat(mDiscoveryItem.getMacAddress()).isEqualTo(DEFAULT_MAC_ADDRESS);
+        assertThat(
+                mDiscoveryItem.getFirstObservationTimestampMillis()).isEqualTo(DEFAULT_TIMESTAMP);
+        assertThat(
+                mDiscoveryItem.getLastObservationTimestampMillis()).isEqualTo(DEFAULT_TIMESTAMP);
+        assertThat(mDiscoveryItem.getActionUrl()).isEqualTo(ACTION_URL);
+        assertThat(mDiscoveryItem.getAppName()).isEqualTo(APP_NAME);
+        assertThat(mDiscoveryItem.getRssi()).isEqualTo(RSSI);
+        assertThat(mDiscoveryItem.getTxPower()).isEqualTo(TX_POWER);
+        assertThat(mDiscoveryItem.getFastPairInformation()).isNull();
+        assertThat(mDiscoveryItem.getFastPairSecretKey()).isNull();
+        assertThat(mDiscoveryItem.getIcon()).isNull();
+        assertThat(mDiscoveryItem.getIconFifeUrl()).isNotNull();
+        assertThat(mDiscoveryItem.getState()).isNotNull();
+        assertThat(mDiscoveryItem.getTitle()).isNotNull();
+        assertThat(mDiscoveryItem.isApp()).isFalse();
+        assertThat(mDiscoveryItem.isDeletable(
+                100000L, 0L)).isTrue();
+        assertThat(mDiscoveryItem.isDeviceType(Cache.NearbyType.NEARBY_CHROMECAST)).isTrue();
+        assertThat(mDiscoveryItem.isExpired(
+                100000L, 0L)).isTrue();
+        assertThat(mDiscoveryItem.isFastPair()).isTrue();
+        assertThat(mDiscoveryItem.isPendingAppInstallValid(5)).isTrue();
+        assertThat(mDiscoveryItem.isPendingAppInstallValid(5,
+                FakeDiscoveryItems.newFastPairDeviceStoredItem(FAST_PAIR_ID,  null,
+                TRIGGER_ID,  DEFAULT_MAC_ADDRESS,  "", RSSI, TX_POWER))).isTrue();
+        assertThat(mDiscoveryItem.isTypeEnabled(Cache.NearbyType.NEARBY_CHROMECAST)).isTrue();
+        assertThat(mDiscoveryItem.toString()).isNotNull();
+    }
+
+    @Test
+    public void isMuted() {
+        assertThat(mDiscoveryItem.isMuted()).isFalse();
+    }
+
+    @Test
+    public void itemWithDefaultDescription_shouldShowUp() {
+        assertThat(mDiscoveryItem.isReadyForDisplay()).isFalse();
+
+        // Null description should not show up.
+        mDiscoveryItem.setStoredItemForTest(DiscoveryItem.newStoredDiscoveryItem());
+        mDiscoveryItem.setStoredItemForTest(
+                FakeDiscoveryItems.newFastPairDeviceStoredItem(FAST_PAIR_ID,  null,
+                        TRIGGER_ID,  DEFAULT_MAC_ADDRESS,  "", RSSI, TX_POWER));
+        assertThat(mDiscoveryItem.isReadyForDisplay()).isFalse();
+
+        // Empty description should not show up.
+        mDiscoveryItem.setStoredItemForTest(
+                FakeDiscoveryItems.newFastPairDeviceStoredItem(FAST_PAIR_ID,  "",
+                        TRIGGER_ID,  DEFAULT_MAC_ADDRESS, DEFAULT_TITLE, RSSI, TX_POWER));
+        assertThat(mDiscoveryItem.isReadyForDisplay()).isFalse();
+    }
+
+    @Test
+    public void itemWithEmptyTitle_shouldNotShowUp() {
+        // Null title should not show up.
+        assertThat(mDiscoveryItem.isReadyForDisplay()).isFalse();
+        // Empty title should not show up.
+        mDiscoveryItem.setStoredItemForTest(
+                FakeDiscoveryItems.newFastPairDeviceStoredItem(FAST_PAIR_ID, DEFAULT_DESCRIPITON,
+                        TRIGGER_ID, DEFAULT_MAC_ADDRESS, "", RSSI, TX_POWER));
+        assertThat(mDiscoveryItem.isReadyForDisplay()).isFalse();
+
+        // Null title should not show up.
+        mDiscoveryItem.setStoredItemForTest(
+                FakeDiscoveryItems.newFastPairDeviceStoredItem(FAST_PAIR_ID, DEFAULT_DESCRIPITON,
+                        TRIGGER_ID, DEFAULT_MAC_ADDRESS, null, RSSI, TX_POWER));
+        assertThat(mDiscoveryItem.isReadyForDisplay()).isFalse();
+    }
+
+    @Test
+    public void itemWithRssiAndTxPower_shouldHaveCorrectEstimatedDistance() {
+        assertThat(mDiscoveryItem.getEstimatedDistance()).isWithin(0.01).of(28.18);
+    }
+
+    @Test
+    public void itemWithoutRssiOrTxPower_shouldNotHaveEstimatedDistance() {
+        mDiscoveryItem.setStoredItemForTest(
+                FakeDiscoveryItems.newFastPairDeviceStoredItem(FAST_PAIR_ID, DEFAULT_DESCRIPITON,
+                        TRIGGER_ID, DEFAULT_MAC_ADDRESS, "", 0, 0));
+        assertThat(mDiscoveryItem.getEstimatedDistance()).isWithin(0.01).of(0);
+    }
+
+    @Test
+    public void getUiHashCode_differentAddress_differentHash() {
+        mDiscoveryItem.setStoredItemForTest(
+                FakeDiscoveryItems.newFastPairDeviceStoredItem(FAST_PAIR_ID, DEFAULT_DESCRIPITON,
+                        TRIGGER_ID, "00:11:22:33:44:55", "", RSSI, TX_POWER));
+        DiscoveryItem compareTo =
+                FakeDiscoveryItems.newFastPairDiscoveryItem(mLocatorContextWrapper);
+        compareTo.setStoredItemForTest(
+                FakeDiscoveryItems.newFastPairDeviceStoredItem(FAST_PAIR_ID, DEFAULT_DESCRIPITON,
+                        TRIGGER_ID, "55:44:33:22:11:00", "", RSSI, TX_POWER));
+        assertThat(mDiscoveryItem.getUiHashCode()).isNotEqualTo(compareTo.getUiHashCode());
+    }
+
+    @Test
+    public void getUiHashCode_sameAddress_sameHash() {
+        mDiscoveryItem.setStoredItemForTest(
+                FakeDiscoveryItems.newFastPairDeviceStoredItem(FAST_PAIR_ID, DEFAULT_DESCRIPITON,
+                        TRIGGER_ID, "00:11:22:33:44:55", "", RSSI, TX_POWER));
+        DiscoveryItem compareTo =
+                FakeDiscoveryItems.newFastPairDiscoveryItem(mLocatorContextWrapper);
+        compareTo.setStoredItemForTest(
+                FakeDiscoveryItems.newFastPairDeviceStoredItem(FAST_PAIR_ID, DEFAULT_DESCRIPITON,
+                        TRIGGER_ID, "00:11:22:33:44:55", "", RSSI, TX_POWER));
+        assertThat(mDiscoveryItem.getUiHashCode()).isEqualTo(compareTo.getUiHashCode());
+    }
+
+    @Test
+    public void isFastPair() {
+        DiscoveryItem fastPairItem =
+                FakeDiscoveryItems.newFastPairDiscoveryItem(mLocatorContextWrapper);
+        assertThat(fastPairItem.isFastPair()).isTrue();
+    }
+
+    @Test
+    public void testEqual() {
+        DiscoveryItem fastPairItem =
+                FakeDiscoveryItems.newFastPairDiscoveryItem(mLocatorContextWrapper);
+        assertThat(mDiscoveryItem.equals(fastPairItem)).isTrue();
+    }
+
+    @Test
+    public void testCompareTo() {
+        DiscoveryItem fastPairItem =
+                FakeDiscoveryItems.newFastPairDiscoveryItem(mLocatorContextWrapper);
+        assertThat(mDiscoveryItem.compareTo(fastPairItem)).isEqualTo(0);
+    }
+
+
+    @Test
+    public void testCopyOfStoredItem() {
+        DiscoveryItem fastPairItem =
+                FakeDiscoveryItems.newFastPairDiscoveryItem(mLocatorContextWrapper);
+        fastPairItem.setStoredItemForTest(
+                FakeDiscoveryItems.newFastPairDeviceStoredItem(FAST_PAIR_ID, DEFAULT_DESCRIPITON,
+                        TRIGGER_ID, "00:11:22:33:44:55", "", RSSI, TX_POWER));
+        assertThat(mDiscoveryItem.equals(fastPairItem)).isFalse();
+        fastPairItem.setStoredItemForTest(mDiscoveryItem.getCopyOfStoredItem());
+        assertThat(mDiscoveryItem.equals(fastPairItem)).isTrue();
+    }
+
+    @Test
+    public void testStoredItemForTest() {
+        DiscoveryItem fastPairItem =
+                FakeDiscoveryItems.newFastPairDiscoveryItem(mLocatorContextWrapper);
+        fastPairItem.setStoredItemForTest(
+                FakeDiscoveryItems.newFastPairDeviceStoredItem(FAST_PAIR_ID, DEFAULT_DESCRIPITON,
+                        TRIGGER_ID, "00:11:22:33:44:55", "", RSSI, TX_POWER));
+        assertThat(mDiscoveryItem.equals(fastPairItem)).isFalse();
+        fastPairItem.setStoredItemForTest(mDiscoveryItem.getStoredItemForTest());
+        assertThat(mDiscoveryItem.equals(fastPairItem)).isTrue();
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/fastpair/cache/FastPairCacheManagerTest.java b/nearby/tests/unit/src/com/android/server/nearby/fastpair/cache/FastPairCacheManagerTest.java
index fdda6f7..18f2cf6 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/fastpair/cache/FastPairCacheManagerTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/fastpair/cache/FastPairCacheManagerTest.java
@@ -20,6 +20,7 @@
 
 import static org.mockito.Mockito.when;
 
+import android.bluetooth.le.ScanResult;
 import android.content.Context;
 
 import androidx.test.core.app.ApplicationProvider;
@@ -50,6 +51,10 @@
     DiscoveryItem mDiscoveryItem2;
     @Mock
     Cache.StoredFastPairItem mStoredFastPairItem;
+    @Mock
+    ScanResult mScanResult;
+
+    Context mContext;
     Cache.StoredDiscoveryItem mStoredDiscoveryItem = Cache.StoredDiscoveryItem.newBuilder()
             .setTriggerId(MODEL_ID)
             .setAppName(APP_NAME).build();
@@ -60,12 +65,12 @@
     @Before
     public void setup() {
         MockitoAnnotations.initMocks(this);
+        mContext = ApplicationProvider.getApplicationContext();
     }
 
     @Test
     @SdkSuppress(minSdkVersion = 32, codeName = "T")
     public void notSaveRetrieveInfo() {
-        Context mContext = ApplicationProvider.getApplicationContext();
         when(mDiscoveryItem.getCopyOfStoredItem()).thenReturn(mStoredDiscoveryItem);
         when(mDiscoveryItem.getTriggerId()).thenReturn(MODEL_ID);
 
@@ -78,7 +83,6 @@
     @Test
     @SdkSuppress(minSdkVersion = 32, codeName = "T")
     public void saveRetrieveInfo() {
-        Context mContext = ApplicationProvider.getApplicationContext();
         when(mDiscoveryItem.getCopyOfStoredItem()).thenReturn(mStoredDiscoveryItem);
         when(mDiscoveryItem.getTriggerId()).thenReturn(MODEL_ID);
         when(mDiscoveryItem2.getCopyOfStoredItem()).thenReturn(mStoredDiscoveryItem2);
@@ -100,7 +104,6 @@
     @Test
     @SdkSuppress(minSdkVersion = 32, codeName = "T")
     public void saveRetrieveInfoStoredFastPairItem() {
-        Context mContext = ApplicationProvider.getApplicationContext();
         Cache.StoredFastPairItem storedFastPairItem = Cache.StoredFastPairItem.newBuilder()
                 .setMacAddress(MAC_ADDRESS)
                 .setAccountKey(ACCOUNT_KEY)
@@ -118,7 +121,6 @@
     @Test
     @SdkSuppress(minSdkVersion = 32, codeName = "T")
     public void checkGetAllFastPairItems() {
-        Context mContext = ApplicationProvider.getApplicationContext();
         Cache.StoredFastPairItem storedFastPairItem = Cache.StoredFastPairItem.newBuilder()
                 .setMacAddress(MAC_ADDRESS)
                 .setAccountKey(ACCOUNT_KEY)
@@ -139,5 +141,15 @@
 
         assertThat(fastPairCacheManager.getAllSavedStoredFastPairItem().size())
                 .isEqualTo(1);
+
+        fastPairCacheManager.cleanUp();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void getDeviceFromScanResult_notCrash() {
+        FastPairCacheManager fastPairCacheManager = new FastPairCacheManager(mContext);
+        fastPairCacheManager.getDeviceFromScanResult(mScanResult);
+
     }
 }
diff --git a/nearby/tests/unit/src/com/android/server/nearby/fastpair/cache/FastPairDbHelperTest.java b/nearby/tests/unit/src/com/android/server/nearby/fastpair/cache/FastPairDbHelperTest.java
new file mode 100644
index 0000000..c5428f5
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/fastpair/cache/FastPairDbHelperTest.java
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair.cache;
+
+import static org.junit.Assert.assertThrows;
+
+import android.content.Context;
+import android.database.sqlite.SQLiteException;
+
+import androidx.test.platform.app.InstrumentationRegistry;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.MockitoAnnotations;
+
+public class FastPairDbHelperTest {
+
+    Context mContext;
+    FastPairDbHelper mFastPairDbHelper;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+        mContext = InstrumentationRegistry.getInstrumentation().getContext();
+        mFastPairDbHelper = new FastPairDbHelper(mContext);
+    }
+
+    @After
+    public void teardown() {
+        mFastPairDbHelper.close();
+    }
+
+    @Test
+    public void testUpgrade_notCrash() {
+        mFastPairDbHelper
+                .onUpgrade(mFastPairDbHelper.getWritableDatabase(), 1, 2);
+    }
+
+    @Test
+    public void testDowngrade_throwsException()  {
+        assertThrows(
+                SQLiteException.class,
+                () -> mFastPairDbHelper.onDowngrade(
+                        mFastPairDbHelper.getWritableDatabase(), 2, 1));
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/fastpair/halfsheet/FastPairHalfSheetManagerTest.java b/nearby/tests/unit/src/com/android/server/nearby/fastpair/halfsheet/FastPairHalfSheetManagerTest.java
index 58e4c47..b51a295 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/fastpair/halfsheet/FastPairHalfSheetManagerTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/fastpair/halfsheet/FastPairHalfSheetManagerTest.java
@@ -16,6 +16,8 @@
 
 package com.android.server.nearby.fastpair.halfsheet;
 
+import static com.google.common.truth.Truth.assertThat;
+
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.ArgumentMatchers.anyInt;
 import static org.mockito.ArgumentMatchers.eq;
@@ -25,6 +27,7 @@
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
+import android.content.Context;
 import android.content.Intent;
 import android.content.pm.ActivityInfo;
 import android.content.pm.ApplicationInfo;
@@ -32,6 +35,8 @@
 import android.content.pm.ResolveInfo;
 import android.os.UserHandle;
 
+import androidx.test.platform.app.InstrumentationRegistry;
+
 import com.android.server.nearby.common.locator.Locator;
 import com.android.server.nearby.common.locator.LocatorContextWrapper;
 import com.android.server.nearby.fastpair.FastPairController;
@@ -50,13 +55,13 @@
 public class FastPairHalfSheetManagerTest {
     private static final String BLEADDRESS = "11:22:44:66";
     private static final String NAME = "device_name";
+    private static final int PASSKEY = 1234;
     private FastPairHalfSheetManager mFastPairHalfSheetManager;
     private Cache.ScanFastPairStoreItem mScanFastPairStoreItem;
+    @Mock private Context mContext;
     @Mock
     LocatorContextWrapper mContextWrapper;
     @Mock
-    ResolveInfo mResolveInfo;
-    @Mock
     PackageManager mPackageManager;
     @Mock
     Locator mLocator;
@@ -66,7 +71,8 @@
     @Before
     public void setup() {
         MockitoAnnotations.initMocks(this);
-
+        when(mContext.getContentResolver()).thenReturn(
+                InstrumentationRegistry.getInstrumentation().getContext().getContentResolver());
         mScanFastPairStoreItem = Cache.ScanFastPairStoreItem.newBuilder()
                 .setAddress(BLEADDRESS)
                 .setDeviceName(NAME)
@@ -133,4 +139,24 @@
         verify(mContextWrapper, never())
                 .startActivityAsUser(intentArgumentCaptor.capture(), eq(UserHandle.CURRENT));
     }
+
+    @Test
+    public void getHalfSheetForegroundState() {
+        mFastPairHalfSheetManager =
+                new FastPairHalfSheetManager(mContextWrapper);
+        assertThat(mFastPairHalfSheetManager.getHalfSheetForegroundState()).isTrue();
+    }
+
+    @Test
+    public void testEmptyMethods() {
+        mFastPairHalfSheetManager =
+                new FastPairHalfSheetManager(mContextWrapper);
+        mFastPairHalfSheetManager.destroyBluetoothPairController();
+        mFastPairHalfSheetManager.disableDismissRunnable();
+        mFastPairHalfSheetManager.notifyPairingProcessDone(true, BLEADDRESS, null);
+        mFastPairHalfSheetManager.showPairingFailed();
+        mFastPairHalfSheetManager.showPairingHalfSheet(null);
+        mFastPairHalfSheetManager.showPairingSuccessHalfSheet(BLEADDRESS);
+        mFastPairHalfSheetManager.showPasskeyConfirmation(null, PASSKEY);
+    }
 }
diff --git a/nearby/tests/unit/src/com/android/server/nearby/fastpair/notification/FastPairNotificationManagerTest.java b/nearby/tests/unit/src/com/android/server/nearby/fastpair/notification/FastPairNotificationManagerTest.java
new file mode 100644
index 0000000..4fb6b37
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/fastpair/notification/FastPairNotificationManagerTest.java
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair.notification;
+
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+
+import androidx.test.platform.app.InstrumentationRegistry;
+
+import com.android.server.nearby.common.locator.LocatorContextWrapper;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+public class FastPairNotificationManagerTest {
+
+    @Mock private Context mContext;
+    private static final boolean USE_LARGE_ICON = true;
+    private static final int NOTIFICATION_ID = 1;
+    private static final String COMPANION_APP = "companionApp";
+    private static final int BATTERY_LEVEL = 1;
+    private static final String DEVICE_NAME = "deviceName";
+    private static final String ADDRESS = "address";
+    private FastPairNotificationManager mFastPairNotificationManager;
+    private LocatorContextWrapper mLocatorContextWrapper;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+        mLocatorContextWrapper = new LocatorContextWrapper(mContext);
+        when(mContext.getContentResolver()).thenReturn(
+                InstrumentationRegistry.getInstrumentation().getContext().getContentResolver());
+        mFastPairNotificationManager =
+                new FastPairNotificationManager(mLocatorContextWrapper, null,
+                        USE_LARGE_ICON, NOTIFICATION_ID);
+    }
+
+    @Test
+    public void  notifyPairingProcessDone() {
+        mFastPairNotificationManager.notifyPairingProcessDone(true, true,
+                "privateAddress", "publicAddress");
+    }
+
+    @Test
+    public void  showConnectingNotification() {
+        mFastPairNotificationManager.showConnectingNotification();
+    }
+
+    @Test
+    public void   showPairingFailedNotification() {
+        mFastPairNotificationManager.showPairingFailedNotification(new byte[]{1});
+    }
+
+    @Test
+    public void  showPairingSucceededNotification() {
+        mFastPairNotificationManager.showPairingSucceededNotification(COMPANION_APP,
+                BATTERY_LEVEL, DEVICE_NAME, ADDRESS);
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/fastpair/pairinghandler/HalfSheetPairingProgressHandlerTest.java b/nearby/tests/unit/src/com/android/server/nearby/fastpair/pairinghandler/HalfSheetPairingProgressHandlerTest.java
new file mode 100644
index 0000000..bfe009c
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/fastpair/pairinghandler/HalfSheetPairingProgressHandlerTest.java
@@ -0,0 +1,135 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair.pairinghandler;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.when;
+
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothDevice;
+
+import com.android.server.nearby.common.bluetooth.fastpair.FastPairConnection;
+import com.android.server.nearby.common.locator.Locator;
+import com.android.server.nearby.common.locator.LocatorContextWrapper;
+import com.android.server.nearby.fastpair.cache.DiscoveryItem;
+import com.android.server.nearby.fastpair.cache.FastPairCacheManager;
+import com.android.server.nearby.fastpair.footprint.FootprintsDeviceManager;
+import com.android.server.nearby.fastpair.halfsheet.FastPairHalfSheetManager;
+import com.android.server.nearby.fastpair.testing.FakeDiscoveryItems;
+
+import com.google.protobuf.ByteString;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import java.time.Clock;
+
+import service.proto.Cache;
+import service.proto.Rpcs;
+
+public class HalfSheetPairingProgressHandlerTest {
+    @Mock
+    Locator mLocator;
+    @Mock
+    LocatorContextWrapper mContextWrapper;
+    @Mock
+    Clock mClock;
+    @Mock
+    FastPairCacheManager mFastPairCacheManager;
+    @Mock
+    FastPairConnection mFastPairConnection;
+    @Mock
+    FootprintsDeviceManager mFootprintsDeviceManager;
+
+    private static final String MAC_ADDRESS = "00:11:22:33:44:55";
+    private static final byte[] ACCOUNT_KEY = new byte[]{0x01, 0x02};
+    private static final int SUBSEQUENT_PAIR_START = 1310;
+    private static final int SUBSEQUENT_PAIR_END = 1320;
+    private static final int PASSKEY = 1234;
+    private static HalfSheetPairingProgressHandler sHalfSheetPairingProgressHandler;
+    private static DiscoveryItem sDiscoveryItem;
+    private static BluetoothDevice sBluetoothDevice;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+        when(mContextWrapper.getLocator()).thenReturn(mLocator);
+        mLocator.overrideBindingForTest(FastPairCacheManager.class, mFastPairCacheManager);
+        mLocator.overrideBindingForTest(Clock.class, mClock);
+        FastPairHalfSheetManager mfastPairHalfSheetManager =
+                new FastPairHalfSheetManager(mContextWrapper);
+        mLocator.bind(FastPairHalfSheetManager.class, mfastPairHalfSheetManager);
+        when(mLocator.get(FastPairHalfSheetManager.class)).thenReturn(mfastPairHalfSheetManager);
+        sDiscoveryItem = FakeDiscoveryItems.newFastPairDiscoveryItem(mContextWrapper);
+        sDiscoveryItem.setStoredItemForTest(
+                sDiscoveryItem.getStoredItemForTest().toBuilder()
+                        .setAuthenticationPublicKeySecp256R1(ByteString.copyFrom(ACCOUNT_KEY))
+                        .setMacAddress(MAC_ADDRESS)
+                        .setFastPairInformation(
+                                Cache.FastPairInformation.newBuilder()
+                                        .setDeviceType(Rpcs.DeviceType.HEADPHONES).build())
+                        .build());
+        sHalfSheetPairingProgressHandler =
+                new HalfSheetPairingProgressHandler(mContextWrapper, sDiscoveryItem,
+                        sDiscoveryItem.getAppPackageName(), ACCOUNT_KEY);
+
+        sBluetoothDevice =
+                BluetoothAdapter.getDefaultAdapter().getRemoteDevice("00:11:22:33:44:55");
+    }
+
+    @Test
+    public void getPairEndEventCode() {
+        assertThat(sHalfSheetPairingProgressHandler
+                .getPairEndEventCode()).isEqualTo(SUBSEQUENT_PAIR_END);
+    }
+
+    @Test
+    public void getPairStartEventCode() {
+        assertThat(sHalfSheetPairingProgressHandler
+                .getPairStartEventCode()).isEqualTo(SUBSEQUENT_PAIR_START);
+    }
+
+    @Test
+    public void testOnHandlePasskeyConfirmation() {
+        sHalfSheetPairingProgressHandler.onHandlePasskeyConfirmation(sBluetoothDevice, PASSKEY);
+    }
+
+    @Test
+    public void testOnPairedCallbackCalled() {
+        sHalfSheetPairingProgressHandler.onPairedCallbackCalled(mFastPairConnection, ACCOUNT_KEY,
+                mFootprintsDeviceManager, MAC_ADDRESS);
+    }
+
+    @Test
+    public void testonPairingFailed() {
+        Throwable e = new Throwable("onPairingFailed");
+        sHalfSheetPairingProgressHandler.onPairingFailed(e);
+    }
+
+    @Test
+    public void testonPairingStarted() {
+        sHalfSheetPairingProgressHandler.onPairingStarted();
+    }
+
+    @Test
+    public void testonPairingSuccess() {
+        sHalfSheetPairingProgressHandler.onPairingSuccess(MAC_ADDRESS);
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/fastpair/pairinghandler/NotificationPairingProgressHandlerTest.java b/nearby/tests/unit/src/com/android/server/nearby/fastpair/pairinghandler/NotificationPairingProgressHandlerTest.java
new file mode 100644
index 0000000..24f296c
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/fastpair/pairinghandler/NotificationPairingProgressHandlerTest.java
@@ -0,0 +1,143 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair.pairinghandler;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.when;
+
+import android.bluetooth.BluetoothManager;
+
+import androidx.annotation.Nullable;
+
+import com.android.server.nearby.common.bluetooth.fastpair.FastPairConnection;
+import com.android.server.nearby.common.locator.Locator;
+import com.android.server.nearby.common.locator.LocatorContextWrapper;
+import com.android.server.nearby.fastpair.cache.DiscoveryItem;
+import com.android.server.nearby.fastpair.cache.FastPairCacheManager;
+import com.android.server.nearby.fastpair.footprint.FootprintsDeviceManager;
+import com.android.server.nearby.fastpair.halfsheet.FastPairHalfSheetManager;
+import com.android.server.nearby.fastpair.notification.FastPairNotificationManager;
+import com.android.server.nearby.fastpair.testing.FakeDiscoveryItems;
+
+import com.google.protobuf.ByteString;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import java.time.Clock;
+
+import service.proto.Cache;
+import service.proto.Rpcs;
+
+public class NotificationPairingProgressHandlerTest {
+
+    @Mock
+    Locator mLocator;
+    @Mock
+    LocatorContextWrapper mContextWrapper;
+    @Mock
+    Clock mClock;
+    @Mock
+    FastPairCacheManager mFastPairCacheManager;
+    @Mock
+    FastPairConnection mFastPairConnection;
+    @Mock
+    FootprintsDeviceManager mFootprintsDeviceManager;
+    @Mock
+    android.bluetooth.BluetoothManager mBluetoothManager;
+
+    private static final String MAC_ADDRESS = "00:11:22:33:44:55";
+    private static final byte[] ACCOUNT_KEY = new byte[]{0x01, 0x02};
+    private static final int SUBSEQUENT_PAIR_START = 1310;
+    private static final int SUBSEQUENT_PAIR_END = 1320;
+    private static DiscoveryItem sDiscoveryItem;
+    private static  NotificationPairingProgressHandler sNotificationPairingProgressHandler;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+        when(mContextWrapper.getSystemService(BluetoothManager.class))
+                .thenReturn(mBluetoothManager);
+        when(mContextWrapper.getLocator()).thenReturn(mLocator);
+        mLocator.overrideBindingForTest(FastPairCacheManager.class,
+                mFastPairCacheManager);
+        mLocator.overrideBindingForTest(Clock.class, mClock);
+        sDiscoveryItem = FakeDiscoveryItems.newFastPairDiscoveryItem(mContextWrapper);
+        sDiscoveryItem.setStoredItemForTest(
+                sDiscoveryItem.getStoredItemForTest().toBuilder()
+                        .setAuthenticationPublicKeySecp256R1(ByteString.copyFrom(ACCOUNT_KEY))
+                        .setFastPairInformation(
+                                Cache.FastPairInformation.newBuilder()
+                                        .setDeviceType(Rpcs.DeviceType.HEADPHONES).build())
+                        .build());
+        sNotificationPairingProgressHandler = createProgressHandler(ACCOUNT_KEY, sDiscoveryItem);
+    }
+
+    @Test
+    public void getPairEndEventCode() {
+        assertThat(sNotificationPairingProgressHandler
+                .getPairEndEventCode()).isEqualTo(SUBSEQUENT_PAIR_END);
+    }
+
+    @Test
+    public void getPairStartEventCode() {
+        assertThat(sNotificationPairingProgressHandler
+                .getPairStartEventCode()).isEqualTo(SUBSEQUENT_PAIR_START);
+    }
+
+    @Test
+    public void onReadyToPair() {
+        sNotificationPairingProgressHandler.onReadyToPair();
+    }
+
+    @Test
+    public void onPairedCallbackCalled() {
+        sNotificationPairingProgressHandler.onPairedCallbackCalled(mFastPairConnection,
+                    ACCOUNT_KEY, mFootprintsDeviceManager, MAC_ADDRESS);
+    }
+
+    @Test
+    public void  onPairingFailed() {
+        Throwable e = new Throwable("Pairing Failed");
+        sNotificationPairingProgressHandler.onPairingFailed(e);
+    }
+
+    @Test
+    public void onPairingSuccess() {
+        sNotificationPairingProgressHandler.onPairingSuccess(sDiscoveryItem.getMacAddress());
+    }
+
+    private NotificationPairingProgressHandler createProgressHandler(
+            @Nullable byte[] accountKey, DiscoveryItem fastPairItem) {
+        FastPairNotificationManager fastPairNotificationManager =
+                new FastPairNotificationManager(mContextWrapper, fastPairItem, true);
+        FastPairHalfSheetManager fastPairHalfSheetManager =
+                new FastPairHalfSheetManager(mContextWrapper);
+        mLocator.overrideBindingForTest(FastPairHalfSheetManager.class, fastPairHalfSheetManager);
+        NotificationPairingProgressHandler mNotificationPairingProgressHandler =
+                new NotificationPairingProgressHandler(
+                        mContextWrapper,
+                        fastPairItem,
+                        fastPairItem.getAppPackageName(),
+                        accountKey,
+                        fastPairNotificationManager);
+        return mNotificationPairingProgressHandler;
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/fastpair/pairinghandler/PairingProgressHandlerBaseTest.java b/nearby/tests/unit/src/com/android/server/nearby/fastpair/pairinghandler/PairingProgressHandlerBaseTest.java
index 2ade5f2..a3eb50c 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/fastpair/pairinghandler/PairingProgressHandlerBaseTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/fastpair/pairinghandler/PairingProgressHandlerBaseTest.java
@@ -20,8 +20,14 @@
 
 import static org.mockito.Mockito.when;
 
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothDevice;
+import android.bluetooth.BluetoothManager;
+
 import androidx.annotation.Nullable;
 
+import com.android.server.nearby.common.bluetooth.fastpair.FastPairConnection;
+import com.android.server.nearby.common.bluetooth.fastpair.Preferences;
 import com.android.server.nearby.common.locator.Locator;
 import com.android.server.nearby.common.locator.LocatorContextWrapper;
 import com.android.server.nearby.fastpair.cache.DiscoveryItem;
@@ -42,8 +48,8 @@
 
 import service.proto.Cache;
 import service.proto.Rpcs;
-
 public class PairingProgressHandlerBaseTest {
+
     @Mock
     Locator mLocator;
     @Mock
@@ -54,24 +60,46 @@
     FastPairCacheManager mFastPairCacheManager;
     @Mock
     FootprintsDeviceManager mFootprintsDeviceManager;
+    @Mock
+    FastPairConnection mFastPairConnection;
+    @Mock
+    BluetoothManager mBluetoothManager;
+
+    private static final String MAC_ADDRESS = "00:11:22:33:44:55";
     private static final byte[] ACCOUNT_KEY = new byte[]{0x01, 0x02};
+    private static final int PASSKEY = 1234;
+    private static DiscoveryItem sDiscoveryItem;
+    private static PairingProgressHandlerBase sPairingProgressHandlerBase;
+    private static BluetoothDevice sBluetoothDevice;
 
     @Before
     public void setup() {
-
         MockitoAnnotations.initMocks(this);
+        when(mContextWrapper.getSystemService(BluetoothManager.class))
+                .thenReturn(mBluetoothManager);
         when(mContextWrapper.getLocator()).thenReturn(mLocator);
         mLocator.overrideBindingForTest(FastPairCacheManager.class,
                 mFastPairCacheManager);
         mLocator.overrideBindingForTest(Clock.class, mClock);
+        sBluetoothDevice =
+                BluetoothAdapter.getDefaultAdapter().getRemoteDevice("00:11:22:33:44:55");
+        sDiscoveryItem = FakeDiscoveryItems.newFastPairDiscoveryItem(mContextWrapper);
+        sDiscoveryItem.setStoredItemForTest(
+                sDiscoveryItem.getStoredItemForTest().toBuilder()
+                        .setAuthenticationPublicKeySecp256R1(ByteString.copyFrom(ACCOUNT_KEY))
+                        .setFastPairInformation(
+                                Cache.FastPairInformation.newBuilder()
+                                        .setDeviceType(Rpcs.DeviceType.HEADPHONES).build())
+                        .build());
+
+        sPairingProgressHandlerBase =
+                createProgressHandler(ACCOUNT_KEY, sDiscoveryItem, /* isRetroactivePair= */ false);
     }
 
     @Test
     public void createHandler_halfSheetSubsequentPairing_notificationPairingHandlerCreated() {
-
-        DiscoveryItem discoveryItem = FakeDiscoveryItems.newFastPairDiscoveryItem(mContextWrapper);
-        discoveryItem.setStoredItemForTest(
-                discoveryItem.getStoredItemForTest().toBuilder()
+        sDiscoveryItem.setStoredItemForTest(
+                sDiscoveryItem.getStoredItemForTest().toBuilder()
                         .setAuthenticationPublicKeySecp256R1(ByteString.copyFrom(ACCOUNT_KEY))
                         .setFastPairInformation(
                                 Cache.FastPairInformation.newBuilder()
@@ -79,7 +107,7 @@
                         .build());
 
         PairingProgressHandlerBase progressHandler =
-                createProgressHandler(ACCOUNT_KEY, discoveryItem, /* isRetroactivePair= */ false);
+                createProgressHandler(ACCOUNT_KEY, sDiscoveryItem, /* isRetroactivePair= */ false);
 
         assertThat(progressHandler).isInstanceOf(NotificationPairingProgressHandler.class);
     }
@@ -87,20 +115,94 @@
     @Test
     public void createHandler_halfSheetInitialPairing_halfSheetPairingHandlerCreated() {
         // No account key
-        DiscoveryItem discoveryItem = FakeDiscoveryItems.newFastPairDiscoveryItem(mContextWrapper);
-        discoveryItem.setStoredItemForTest(
-                discoveryItem.getStoredItemForTest().toBuilder()
+        sDiscoveryItem.setStoredItemForTest(
+                sDiscoveryItem.getStoredItemForTest().toBuilder()
                         .setFastPairInformation(
                                 Cache.FastPairInformation.newBuilder()
                                         .setDeviceType(Rpcs.DeviceType.HEADPHONES).build())
                         .build());
 
         PairingProgressHandlerBase progressHandler =
-                createProgressHandler(null, discoveryItem, /* isRetroactivePair= */ false);
+                createProgressHandler(null, sDiscoveryItem, /* isRetroactivePair= */ false);
 
         assertThat(progressHandler).isInstanceOf(HalfSheetPairingProgressHandler.class);
     }
 
+    @Test
+    public void onPairingStarted() {
+        sPairingProgressHandlerBase.onPairingStarted();
+    }
+
+    @Test
+    public void onWaitForScreenUnlock() {
+        sPairingProgressHandlerBase.onWaitForScreenUnlock();
+    }
+
+    @Test
+    public void  onScreenUnlocked() {
+        sPairingProgressHandlerBase.onScreenUnlocked();
+    }
+
+    @Test
+    public void onReadyToPair() {
+        sPairingProgressHandlerBase.onReadyToPair();
+    }
+
+    @Test
+    public void  onSetupPreferencesBuilder() {
+        Preferences.Builder prefsBuilder =
+                Preferences.builder()
+                        .setEnableBrEdrHandover(false)
+                        .setIgnoreDiscoveryError(true);
+        sPairingProgressHandlerBase.onSetupPreferencesBuilder(prefsBuilder);
+    }
+
+    @Test
+    public void  onPairingSetupCompleted() {
+        sPairingProgressHandlerBase.onPairingSetupCompleted();
+    }
+
+    @Test
+    public void onHandlePasskeyConfirmation() {
+        sPairingProgressHandlerBase.onHandlePasskeyConfirmation(sBluetoothDevice, PASSKEY);
+    }
+
+    @Test
+    public void getKeyForLocalCache() {
+        FastPairConnection.SharedSecret sharedSecret =
+                FastPairConnection.SharedSecret.create(ACCOUNT_KEY, sDiscoveryItem.getMacAddress());
+        sPairingProgressHandlerBase
+                .getKeyForLocalCache(ACCOUNT_KEY, mFastPairConnection, sharedSecret);
+    }
+
+    @Test
+    public void onPairedCallbackCalled() {
+        sPairingProgressHandlerBase.onPairedCallbackCalled(mFastPairConnection,
+                ACCOUNT_KEY, mFootprintsDeviceManager, MAC_ADDRESS);
+    }
+
+    @Test
+    public void onPairingFailed() {
+        Throwable e = new Throwable("Pairing Failed");
+        sPairingProgressHandlerBase.onPairingFailed(e);
+    }
+
+    @Test
+    public void onPairingSuccess() {
+        sPairingProgressHandlerBase.onPairingSuccess(sDiscoveryItem.getMacAddress());
+    }
+
+    @Test
+    public void  optInFootprintsForInitialPairing() {
+        sPairingProgressHandlerBase.optInFootprintsForInitialPairing(
+                mFootprintsDeviceManager, sDiscoveryItem, ACCOUNT_KEY, null);
+    }
+
+    @Test
+    public void skipWaitingScreenUnlock() {
+        assertThat(sPairingProgressHandlerBase.skipWaitingScreenUnlock()).isFalse();
+    }
+
     private PairingProgressHandlerBase createProgressHandler(
             @Nullable byte[] accountKey, DiscoveryItem fastPairItem, boolean isRetroactivePair) {
         FastPairNotificationManager fastPairNotificationManager =
diff --git a/nearby/tests/unit/src/com/android/server/nearby/fastpair/testing/FakeDiscoveryItems.java b/nearby/tests/unit/src/com/android/server/nearby/fastpair/testing/FakeDiscoveryItems.java
index c406e47..cdec04d 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/fastpair/testing/FakeDiscoveryItems.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/fastpair/testing/FakeDiscoveryItems.java
@@ -22,10 +22,17 @@
 import service.proto.Cache;
 
 public class FakeDiscoveryItems {
-    public static final String DEFAULT_MAC_ADDRESS = "00:11:22:33:44:55";
-    public static final long DEFAULT_TIMESTAMP = 1000000000L;
-    public static final String DEFAULT_DESCRIPITON = "description";
-    public static final String TRIGGER_ID = "trigger.id";
+    private static final String DEFAULT_MAC_ADDRESS = "00:11:22:33:44:55";
+    private static final long DEFAULT_TIMESTAMP = 1000000000L;
+    private static final String DEFAULT_DESCRIPITON = "description";
+    private static final String APP_NAME = "app_name";
+    private static final String ACTION_URL =
+            "intent:#Intent;action=com.android.server.nearby:ACTION_FAST_PAIR;"
+                    + "package=com.google.android.gms;"
+                    + "component=com.google.android.gms/"
+                    + ".nearby.discovery.service.DiscoveryService;end";
+    private static final String DISPLAY_URL = "DISPLAY_URL";
+    private static final String TRIGGER_ID = "trigger.id";
     private static final String FAST_PAIR_ID = "id";
     private static final int RSSI = -80;
     private static final int TX_POWER = -10;
@@ -46,9 +53,36 @@
         item.setMacAddress(DEFAULT_MAC_ADDRESS);
         item.setFirstObservationTimestampMillis(DEFAULT_TIMESTAMP);
         item.setLastObservationTimestampMillis(DEFAULT_TIMESTAMP);
+        item.setActionUrl(ACTION_URL);
+        item.setAppName(APP_NAME);
         item.setRssi(RSSI);
         item.setTxPower(TX_POWER);
+        item.setDisplayUrl(DISPLAY_URL);
         return item.build();
     }
 
+    public static Cache.StoredDiscoveryItem newFastPairDeviceStoredItem(String id,
+            String description, String triggerId, String macAddress, String title,
+            int rssi, int txPower) {
+        Cache.StoredDiscoveryItem.Builder item = Cache.StoredDiscoveryItem.newBuilder();
+        item.setState(Cache.StoredDiscoveryItem.State.STATE_ENABLED);
+        if (id != null) {
+            item.setId(id);
+        }
+        if (description != null) {
+            item.setDescription(description);
+        }
+        if (triggerId != null) {
+            item.setTriggerId(triggerId);
+        }
+        if (macAddress != null) {
+            item.setMacAddress(macAddress);
+        }
+        if (title != null) {
+            item.setTitle(title);
+        }
+        item.setRssi(rssi);
+        item.setTxPower(txPower);
+        return item.build();
+    }
 }
diff --git a/nearby/tests/unit/src/com/android/server/nearby/fastpair/testing/MockingLocator.java b/nearby/tests/unit/src/com/android/server/nearby/fastpair/testing/MockingLocator.java
index b261b26..c9a4533 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/fastpair/testing/MockingLocator.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/fastpair/testing/MockingLocator.java
@@ -41,7 +41,7 @@
     }
 
     @SuppressWarnings("nullness") // due to passing in this before initialized.
-    private MockingLocator(Context context, Locator locator) {
+    public MockingLocator(Context context, Locator locator) {
         super(context, locator);
         this.mLocatorContextWrapper = new LocatorContextWrapper(context, this);
     }
diff --git a/nearby/tests/unit/src/com/android/server/nearby/injector/ContextHubManagerAdapterTest.java b/nearby/tests/unit/src/com/android/server/nearby/injector/ContextHubManagerAdapterTest.java
new file mode 100644
index 0000000..b577064
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/injector/ContextHubManagerAdapterTest.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.injector;
+
+import android.hardware.location.ContextHubInfo;
+import android.hardware.location.ContextHubManager;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+public class ContextHubManagerAdapterTest {
+    private ContextHubManagerAdapter mContextHubManagerAdapter;
+
+    @Mock
+    ContextHubManager mContextHubManager;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+        mContextHubManagerAdapter = new ContextHubManagerAdapter(mContextHubManager);
+    }
+
+    @Test
+    public void getContextHubs() {
+        mContextHubManagerAdapter.getContextHubs();
+    }
+
+    @Test
+    public void queryNanoApps() {
+        mContextHubManagerAdapter.queryNanoApps(new ContextHubInfo());
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/presence/DataElementHeaderTest.java b/nearby/tests/unit/src/com/android/server/nearby/presence/DataElementHeaderTest.java
new file mode 100644
index 0000000..e186709
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/presence/DataElementHeaderTest.java
@@ -0,0 +1,179 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.presence;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.junit.Assert.assertThrows;
+
+import android.nearby.BroadcastRequest;
+
+import org.junit.Test;
+
+import java.util.List;
+
+/**
+ * Unit test for {@link DataElementHeader}.
+ */
+public class DataElementHeaderTest {
+
+    private static final int VERSION = BroadcastRequest.PRESENCE_VERSION_V1;
+
+    @Test
+    public void test_illegalLength() {
+        assertThrows(IllegalArgumentException.class,
+                () -> new DataElementHeader(VERSION, 12, 128));
+    }
+
+    @Test
+    public void test_singeByteConversion() {
+        DataElementHeader header = new DataElementHeader(VERSION, 12, 3);
+        byte[] bytes = header.toBytes();
+        assertThat(bytes).isEqualTo(new byte[]{(byte) 0b00111100});
+
+        DataElementHeader afterConversionHeader = DataElementHeader.fromBytes(VERSION, bytes);
+        assertThat(afterConversionHeader.getDataLength()).isEqualTo(3);
+        assertThat(afterConversionHeader.getDataType()).isEqualTo(12);
+    }
+
+    @Test
+    public void test_multipleBytesConversion() {
+        DataElementHeader header = new DataElementHeader(VERSION, 6, 100);
+        DataElementHeader afterConversionHeader =
+                DataElementHeader.fromBytes(VERSION, header.toBytes());
+        assertThat(afterConversionHeader.getDataLength()).isEqualTo(100);
+        assertThat(afterConversionHeader.getDataType()).isEqualTo(6);
+    }
+
+    @Test
+    public void test_fromBytes() {
+        // Single byte case.
+        byte[] singleByte = new byte[]{(byte) 0b01011101};
+        DataElementHeader singeByteHeader = DataElementHeader.fromBytes(VERSION, singleByte);
+        assertThat(singeByteHeader.getDataLength()).isEqualTo(5);
+        assertThat(singeByteHeader.getDataType()).isEqualTo(13);
+
+        // Two bytes case.
+        byte[] twoBytes = new byte[]{(byte) 0b11011101, (byte) 0b01011101};
+        DataElementHeader twoBytesHeader = DataElementHeader.fromBytes(VERSION, twoBytes);
+        assertThat(twoBytesHeader.getDataLength()).isEqualTo(93);
+        assertThat(twoBytesHeader.getDataType()).isEqualTo(93);
+
+        // Three bytes case.
+        byte[] threeBytes = new byte[]{(byte) 0b11011101, (byte) 0b11111111, (byte) 0b01011101};
+        DataElementHeader threeBytesHeader = DataElementHeader.fromBytes(VERSION, threeBytes);
+        assertThat(threeBytesHeader.getDataLength()).isEqualTo(93);
+        assertThat(threeBytesHeader.getDataType()).isEqualTo(16349);
+
+        // Four bytes case.
+        byte[] fourBytes = new byte[]{
+                (byte) 0b11011101, (byte) 0b11111111, (byte) 0b11111111, (byte) 0b01011101};
+
+        DataElementHeader fourBytesHeader = DataElementHeader.fromBytes(VERSION, fourBytes);
+        assertThat(fourBytesHeader.getDataLength()).isEqualTo(93);
+        assertThat(fourBytesHeader.getDataType()).isEqualTo(2097117);
+    }
+
+    @Test
+    public void test_fromBytesIllegal_singleByte() {
+        assertThrows(IllegalArgumentException.class,
+                () -> DataElementHeader.fromBytes(VERSION, new byte[]{(byte) 0b11011101}));
+    }
+
+    @Test
+    public void test_fromBytesIllegal_twoBytes_wrongFirstByte() {
+        assertThrows(IllegalArgumentException.class,
+                () -> DataElementHeader.fromBytes(VERSION,
+                        new byte[]{(byte) 0b01011101, (byte) 0b01011101}));
+    }
+
+    @Test
+    public void test_fromBytesIllegal_twoBytes_wrongLastByte() {
+        assertThrows(IllegalArgumentException.class,
+                () -> DataElementHeader.fromBytes(VERSION,
+                        new byte[]{(byte) 0b11011101, (byte) 0b11011101}));
+    }
+
+    @Test
+    public void test_fromBytesIllegal_threeBytes() {
+        assertThrows(IllegalArgumentException.class,
+                () -> DataElementHeader.fromBytes(VERSION,
+                        new byte[]{(byte) 0b11011101, (byte) 0b11011101, (byte) 0b11011101}));
+    }
+
+    @Test
+    public void test_multipleBytesConversion_largeNumber() {
+        DataElementHeader header = new DataElementHeader(VERSION, 22213546, 66);
+        DataElementHeader afterConversionHeader =
+                DataElementHeader.fromBytes(VERSION, header.toBytes());
+        assertThat(afterConversionHeader.getDataLength()).isEqualTo(66);
+        assertThat(afterConversionHeader.getDataType()).isEqualTo(22213546);
+    }
+
+    @Test
+    public void test_isExtending() {
+        assertThat(DataElementHeader.isExtending((byte) 0b10000100)).isTrue();
+        assertThat(DataElementHeader.isExtending((byte) 0b01110100)).isFalse();
+        assertThat(DataElementHeader.isExtending((byte) 0b00000000)).isFalse();
+    }
+
+    @Test
+    public void test_convertTag() {
+        assertThat(DataElementHeader.convertTag(true)).isEqualTo((byte) 128);
+        assertThat(DataElementHeader.convertTag(false)).isEqualTo(0);
+    }
+
+    @Test
+    public void test_getHeaderValue() {
+        assertThat(DataElementHeader.getHeaderValue((byte) 0b10000100)).isEqualTo(4);
+        assertThat(DataElementHeader.getHeaderValue((byte) 0b00000100)).isEqualTo(4);
+        assertThat(DataElementHeader.getHeaderValue((byte) 0b11010100)).isEqualTo(84);
+        assertThat(DataElementHeader.getHeaderValue((byte) 0b01010100)).isEqualTo(84);
+    }
+
+    @Test
+    public void test_convertTypeMultipleIntList() {
+        List<Byte> list = DataElementHeader.convertTypeMultipleBytes(128);
+        assertThat(list.size()).isEqualTo(2);
+        assertThat(list.get(0)).isEqualTo((byte) 0b10000001);
+        assertThat(list.get(1)).isEqualTo((byte) 0b00000000);
+
+        List<Byte> list2 = DataElementHeader.convertTypeMultipleBytes(10);
+        assertThat(list2.size()).isEqualTo(1);
+        assertThat(list2.get(0)).isEqualTo((byte) 0b00001010);
+
+        List<Byte> list3 = DataElementHeader.convertTypeMultipleBytes(5242398);
+        assertThat(list3.size()).isEqualTo(4);
+        assertThat(list3.get(0)).isEqualTo((byte) 0b10000010);
+        assertThat(list3.get(1)).isEqualTo((byte) 0b10111111);
+        assertThat(list3.get(2)).isEqualTo((byte) 0b11111100);
+        assertThat(list3.get(3)).isEqualTo((byte) 0b00011110);
+    }
+
+    @Test
+    public void test_getTypeMultipleBytes() {
+        byte[] inputBytes = new byte[]{(byte) 0b11011000, (byte) 0b10000000, (byte) 0b00001001};
+        // 0b101100000000000001001
+        assertThat(DataElementHeader.getTypeMultipleBytes(inputBytes)).isEqualTo(1441801);
+
+        byte[] inputBytes2 = new byte[]{(byte) 0b00010010};
+        assertThat(DataElementHeader.getTypeMultipleBytes(inputBytes2)).isEqualTo(18);
+
+        byte[] inputBytes3 = new byte[]{(byte) 0b10000001, (byte) 0b00000000};
+        assertThat(DataElementHeader.getTypeMultipleBytes(inputBytes3)).isEqualTo(128);
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/presence/ExtendedAdvertisementTest.java b/nearby/tests/unit/src/com/android/server/nearby/presence/ExtendedAdvertisementTest.java
new file mode 100644
index 0000000..895df69
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/presence/ExtendedAdvertisementTest.java
@@ -0,0 +1,261 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.presence;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.nearby.BroadcastRequest;
+import android.nearby.DataElement;
+import android.nearby.PresenceBroadcastRequest;
+import android.nearby.PresenceCredential;
+import android.nearby.PrivateCredential;
+import android.nearby.PublicCredential;
+
+import com.android.server.nearby.util.encryption.CryptorImpIdentityV1;
+import com.android.server.nearby.util.encryption.CryptorImpV1;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+public class ExtendedAdvertisementTest {
+    private static final int IDENTITY_TYPE = PresenceCredential.IDENTITY_TYPE_PRIVATE;
+    private static final int DATA_TYPE_MODEL_ID = 7;
+    private static final int DATA_TYPE_BLE_ADDRESS = 101;
+    private static final int DATA_TYPE_PUBLIC_IDENTITY = 3;
+    private static final byte[] MODE_ID_DATA =
+            new byte[]{2, 1, 30, 2, 10, -16, 6, 22, 44, -2, -86, -69, -52};
+    private static final byte[] BLE_ADDRESS = new byte[]{124, 4, 56, 60, 120, -29, -90};
+    private static final DataElement MODE_ID_ADDRESS_ELEMENT =
+            new DataElement(DATA_TYPE_MODEL_ID, MODE_ID_DATA);
+    private static final DataElement BLE_ADDRESS_ELEMENT =
+            new DataElement(DATA_TYPE_BLE_ADDRESS, BLE_ADDRESS);
+
+    private static final byte[] IDENTITY =
+            new byte[]{1, 2, 3, 4, 1, 2, 3, 4, 1, 2, 3, 4, 1, 2, 3, 4};
+    private static final int MEDIUM_TYPE_BLE = 0;
+    private static final byte[] SALT = {2, 3};
+    private static final int PRESENCE_ACTION_1 = 1;
+    private static final int PRESENCE_ACTION_2 = 2;
+
+    private static final byte[] SECRET_ID = new byte[]{1, 2, 3, 4};
+    private static final byte[] AUTHENTICITY_KEY =
+            new byte[]{-97, 10, 107, -86, 25, 65, -54, -95, -72, 59, 54, 93, 9, 3, -24, -88};
+    private static final byte[] PUBLIC_KEY =
+            new byte[] {
+                    48, 89, 48, 19, 6, 7, 42, -122, 72, -50, 61, 2, 1, 6, 8, 42, -122, 72, -50, 61,
+                    66, 0, 4, -56, -39, -92, 69, 0, 52, 23, 67, 83, -14, 75, 52, -14, -5, -41, 48,
+                    -83, 31, 42, -39, 102, -13, 22, -73, -73, 86, 30, -96, -84, -13, 4, 122, 104,
+                    -65, 64, 91, -109, -45, -35, -56, 55, -79, 47, -85, 27, -96, -119, -82, -80,
+                    123, 41, -119, -25, 1, -112, 112
+            };
+    private static final byte[] ENCRYPTED_METADATA_BYTES =
+            new byte[] {
+                    -44, -25, -95, -124, -7, 90, 116, -8, 7, -120, -23, -22, -106, -44, -19, 61,
+                    -18, 39, 29, 78, 108, -11, -39, 85, -30, 64, -99, 102, 65, 37, -42, 114, -37,
+                    88, -112, 8, -75, -53, 23, -16, -104, 67, 49, 48, -53, 73, -109, 44, -23, -11,
+                    -118, -61, -37, -104, 60, 105, 115, 1, 56, -89, -107, -45, -116, -1, -25, 84,
+                    -19, -128, 81, 11, 92, 77, -58, 82, 122, 123, 31, -87, -57, 70, 23, -81, 7, 2,
+                    -114, -83, 74, 124, -68, -98, 47, 91, 9, 48, -67, 41, -7, -97, 78, 66, -65, 58,
+                    -4, -46, -30, -85, -50, 100, 46, -66, -128, 7, 66, 9, 88, 95, 12, -13, 81, -91,
+            };
+    private static final byte[] METADATA_ENCRYPTION_KEY_TAG =
+            new byte[] {-126, -104, 1, -1, 26, -46, -68, -86};
+    private static final String DEVICE_NAME = "test_device";
+
+    private PresenceBroadcastRequest.Builder mBuilder;
+    private PrivateCredential mPrivateCredential;
+    private PublicCredential mPublicCredential;
+
+    @Before
+    public void setUp() {
+        mPrivateCredential =
+                new PrivateCredential.Builder(SECRET_ID, AUTHENTICITY_KEY, IDENTITY, DEVICE_NAME)
+                        .setIdentityType(PresenceCredential.IDENTITY_TYPE_PRIVATE)
+                        .build();
+        mPublicCredential =
+                new PublicCredential.Builder(SECRET_ID, AUTHENTICITY_KEY, PUBLIC_KEY,
+                        ENCRYPTED_METADATA_BYTES, METADATA_ENCRYPTION_KEY_TAG)
+                        .build();
+        mBuilder =
+                new PresenceBroadcastRequest.Builder(Collections.singletonList(MEDIUM_TYPE_BLE),
+                        SALT, mPrivateCredential)
+                        .setVersion(BroadcastRequest.PRESENCE_VERSION_V1)
+                        .addAction(PRESENCE_ACTION_1)
+                        .addAction(PRESENCE_ACTION_2)
+                        .addExtendedProperty(new DataElement(DATA_TYPE_BLE_ADDRESS, BLE_ADDRESS))
+                        .addExtendedProperty(new DataElement(DATA_TYPE_MODEL_ID, MODE_ID_DATA));
+    }
+
+    @Test
+    public void test_createFromRequest() {
+        ExtendedAdvertisement originalAdvertisement = ExtendedAdvertisement.createFromRequest(
+                mBuilder.build());
+
+        assertThat(originalAdvertisement.getActions())
+                .containsExactly(PRESENCE_ACTION_1, PRESENCE_ACTION_2);
+        assertThat(originalAdvertisement.getIdentity()).isEqualTo(IDENTITY);
+        assertThat(originalAdvertisement.getIdentityType()).isEqualTo(IDENTITY_TYPE);
+        assertThat(originalAdvertisement.getLength()).isEqualTo(66);
+        assertThat(originalAdvertisement.getVersion()).isEqualTo(
+                BroadcastRequest.PRESENCE_VERSION_V1);
+        assertThat(originalAdvertisement.getSalt()).isEqualTo(SALT);
+        assertThat(originalAdvertisement.getDataElements())
+                .containsExactly(MODE_ID_ADDRESS_ELEMENT, BLE_ADDRESS_ELEMENT);
+    }
+
+    @Test
+    public void test_createFromRequest_encodeAndDecode() {
+        ExtendedAdvertisement originalAdvertisement = ExtendedAdvertisement.createFromRequest(
+                mBuilder.build());
+
+        byte[] generatedBytes = originalAdvertisement.toBytes();
+
+        ExtendedAdvertisement newAdvertisement =
+                ExtendedAdvertisement.fromBytes(generatedBytes, mPublicCredential);
+
+        assertThat(newAdvertisement.getActions())
+                .containsExactly(PRESENCE_ACTION_1, PRESENCE_ACTION_2);
+        assertThat(newAdvertisement.getIdentity()).isEqualTo(IDENTITY);
+        assertThat(newAdvertisement.getIdentityType()).isEqualTo(IDENTITY_TYPE);
+        assertThat(newAdvertisement.getLength()).isEqualTo(66);
+        assertThat(newAdvertisement.getVersion()).isEqualTo(
+                BroadcastRequest.PRESENCE_VERSION_V1);
+        assertThat(newAdvertisement.getSalt()).isEqualTo(SALT);
+        assertThat(newAdvertisement.getDataElements())
+                .containsExactly(MODE_ID_ADDRESS_ELEMENT, BLE_ADDRESS_ELEMENT);
+    }
+
+    @Test
+    public void test_createFromRequest_invalidParameter() {
+        // invalid version
+        mBuilder.setVersion(BroadcastRequest.PRESENCE_VERSION_V0);
+        assertThat(ExtendedAdvertisement.createFromRequest(mBuilder.build())).isNull();
+
+        // invalid salt
+        PresenceBroadcastRequest.Builder builder =
+                new PresenceBroadcastRequest.Builder(Collections.singletonList(MEDIUM_TYPE_BLE),
+                        new byte[]{1, 2, 3}, mPrivateCredential)
+                        .setVersion(BroadcastRequest.PRESENCE_VERSION_V1)
+                        .addAction(PRESENCE_ACTION_1);
+        assertThat(ExtendedAdvertisement.createFromRequest(builder.build())).isNull();
+
+        // invalid identity
+        PrivateCredential privateCredential =
+                new PrivateCredential.Builder(SECRET_ID,
+                        AUTHENTICITY_KEY, new byte[]{1, 2, 3, 4}, DEVICE_NAME)
+                        .setIdentityType(PresenceCredential.IDENTITY_TYPE_PRIVATE)
+                        .build();
+        PresenceBroadcastRequest.Builder builder2 =
+                new PresenceBroadcastRequest.Builder(Collections.singletonList(MEDIUM_TYPE_BLE),
+                        new byte[]{1, 2, 3}, privateCredential)
+                        .setVersion(BroadcastRequest.PRESENCE_VERSION_V1)
+                        .addAction(PRESENCE_ACTION_1);
+        assertThat(ExtendedAdvertisement.createFromRequest(builder2.build())).isNull();
+
+        // empty action
+        PresenceBroadcastRequest.Builder builder3 =
+                new PresenceBroadcastRequest.Builder(Collections.singletonList(MEDIUM_TYPE_BLE),
+                        SALT, mPrivateCredential)
+                        .setVersion(BroadcastRequest.PRESENCE_VERSION_V1);
+        assertThat(ExtendedAdvertisement.createFromRequest(builder3.build())).isNull();
+    }
+
+    @Test
+    public void test_toBytes() {
+        ExtendedAdvertisement adv = ExtendedAdvertisement.createFromRequest(mBuilder.build());
+        assertThat(adv.toBytes()).isEqualTo(getExtendedAdvertisementByteArray());
+    }
+
+    @Test
+    public void test_fromBytes() {
+        byte[] originalBytes = getExtendedAdvertisementByteArray();
+        ExtendedAdvertisement adv =
+                ExtendedAdvertisement.fromBytes(originalBytes, mPublicCredential);
+
+        assertThat(adv.getActions())
+                .containsExactly(PRESENCE_ACTION_1, PRESENCE_ACTION_2);
+        assertThat(adv.getIdentity()).isEqualTo(IDENTITY);
+        assertThat(adv.getIdentityType()).isEqualTo(IDENTITY_TYPE);
+        assertThat(adv.getLength()).isEqualTo(66);
+        assertThat(adv.getVersion()).isEqualTo(
+                BroadcastRequest.PRESENCE_VERSION_V1);
+        assertThat(adv.getSalt()).isEqualTo(SALT);
+        assertThat(adv.getDataElements())
+                .containsExactly(MODE_ID_ADDRESS_ELEMENT, BLE_ADDRESS_ELEMENT);
+    }
+
+    @Test
+    public void test_toString() {
+        ExtendedAdvertisement adv = ExtendedAdvertisement.createFromRequest(mBuilder.build());
+        assertThat(adv.toString()).isEqualTo("ExtendedAdvertisement:"
+                + "<VERSION: 1, length: 66, dataElementCount: 2, identityType: 1, "
+                + "identity: [1, 2, 3, 4, 1, 2, 3, 4, 1, 2, 3, 4, 1, 2, 3, 4], salt: [2, 3],"
+                + " actions: [1, 2]>");
+    }
+
+    @Test
+    public void test_getDataElements_accordingToType() {
+        ExtendedAdvertisement adv = ExtendedAdvertisement.createFromRequest(mBuilder.build());
+        List<DataElement> dataElements = new ArrayList<>();
+
+        dataElements.add(BLE_ADDRESS_ELEMENT);
+        assertThat(adv.getDataElements(DATA_TYPE_BLE_ADDRESS)).isEqualTo(dataElements);
+        assertThat(adv.getDataElements(DATA_TYPE_PUBLIC_IDENTITY)).isEmpty();
+    }
+
+    private static byte[] getExtendedAdvertisementByteArray() {
+        ByteBuffer buffer = ByteBuffer.allocate(66);
+        buffer.put((byte) 0b00100000); // Header V1
+        buffer.put((byte) 0b00100000); // Salt header: length 2, type 0
+        // Salt data
+        buffer.put(SALT);
+        // Identity header: length 16, type 1 (private identity)
+        buffer.put(new byte[]{(byte) 0b10010000, (byte) 0b00000001});
+        // Identity data
+        buffer.put(CryptorImpIdentityV1.getInstance().encrypt(IDENTITY, SALT, AUTHENTICITY_KEY));
+
+        ByteBuffer deBuffer = ByteBuffer.allocate(28);
+        // Action1 header: length 1, type 6
+        deBuffer.put(new byte[]{(byte) 0b00010110});
+        // Action1 data
+        deBuffer.put((byte) PRESENCE_ACTION_1);
+        // Action2 header: length 1, type 6
+        deBuffer.put(new byte[]{(byte) 0b00010110});
+        // Action2 data
+        deBuffer.put((byte) PRESENCE_ACTION_2);
+        // Ble address header: length 7, type 102
+        deBuffer.put(new byte[]{(byte) 0b10000111, (byte) 0b01100101});
+        // Ble address data
+        deBuffer.put(BLE_ADDRESS);
+        // model id header: length 13, type 7
+        deBuffer.put(new byte[]{(byte) 0b10001101, (byte) 0b00000111});
+        // model id data
+        deBuffer.put(MODE_ID_DATA);
+
+        byte[] data = deBuffer.array();
+        CryptorImpV1 cryptor = CryptorImpV1.getInstance();
+        buffer.put(cryptor.encrypt(data, SALT, AUTHENTICITY_KEY));
+        buffer.put(cryptor.sign(data, AUTHENTICITY_KEY));
+
+        return buffer.array();
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/presence/ExtendedAdvertisementUtilsTest.java b/nearby/tests/unit/src/com/android/server/nearby/presence/ExtendedAdvertisementUtilsTest.java
new file mode 100644
index 0000000..c4fccf7
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/presence/ExtendedAdvertisementUtilsTest.java
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.presence;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.nearby.BroadcastRequest;
+import android.nearby.DataElement;
+
+import org.junit.Test;
+
+import java.util.Arrays;
+
+/**
+ * Unit test for {@link ExtendedAdvertisementUtils}.
+ */
+public class ExtendedAdvertisementUtilsTest {
+    private static final byte[] ADVERTISEMENT1 = new byte[]{0b00100000, 12, 34, 78, 10};
+    private static final byte[] ADVERTISEMENT2 = new byte[]{0b00100000, 0b00100011, 34, 78,
+            (byte) 0b10010000, (byte) 0b00000100,
+            1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16};
+
+    private static final int DATA_TYPE_SALT = 3;
+    private static final int DATA_TYPE_PRIVATE_IDENTITY = 4;
+
+    @Test
+    public void test_constructHeader() {
+        assertThat(ExtendedAdvertisementUtils.constructHeader(1)).isEqualTo(0b100000);
+        assertThat(ExtendedAdvertisementUtils.constructHeader(0)).isEqualTo(0);
+        assertThat(ExtendedAdvertisementUtils.constructHeader(6)).isEqualTo((byte) 0b11000000);
+    }
+
+    @Test
+    public void test_getVersion() {
+        assertThat(ExtendedAdvertisementUtils.getVersion(ADVERTISEMENT1)).isEqualTo(1);
+        byte[] adv = new byte[]{(byte) 0b10111100, 9, 19, 90, 23};
+        assertThat(ExtendedAdvertisementUtils.getVersion(adv)).isEqualTo(5);
+        byte[] adv2 = new byte[]{(byte) 0b10011111, 9, 19, 90, 23};
+        assertThat(ExtendedAdvertisementUtils.getVersion(adv2)).isEqualTo(4);
+    }
+
+    @Test
+    public void test_getDataElementHeader_salt() {
+        byte[] saltHeaderArray = ExtendedAdvertisementUtils.getDataElementHeader(ADVERTISEMENT2, 1);
+        DataElementHeader header = DataElementHeader.fromBytes(
+                BroadcastRequest.PRESENCE_VERSION_V1, saltHeaderArray);
+        assertThat(header.getDataType()).isEqualTo(DATA_TYPE_SALT);
+        assertThat(header.getDataLength()).isEqualTo(ExtendedAdvertisement.SALT_DATA_LENGTH);
+    }
+
+    @Test
+    public void test_getDataElementHeader_identity() {
+        byte[] identityHeaderArray =
+                ExtendedAdvertisementUtils.getDataElementHeader(ADVERTISEMENT2, 4);
+        DataElementHeader header = DataElementHeader.fromBytes(BroadcastRequest.PRESENCE_VERSION_V1,
+                identityHeaderArray);
+        assertThat(header.getDataType()).isEqualTo(DATA_TYPE_PRIVATE_IDENTITY);
+        assertThat(header.getDataLength()).isEqualTo(ExtendedAdvertisement.IDENTITY_DATA_LENGTH);
+    }
+
+    @Test
+    public void test_constructDataElement_salt() {
+        DataElement salt = new DataElement(DATA_TYPE_SALT, new byte[]{13, 14});
+        byte[] saltArray = ExtendedAdvertisementUtils.convertDataElementToBytes(salt);
+        // Data length and salt header length.
+        assertThat(saltArray.length).isEqualTo(ExtendedAdvertisement.SALT_DATA_LENGTH + 1);
+        // Header
+        assertThat(saltArray[0]).isEqualTo((byte) 0b00100011);
+        // Data
+        assertThat(saltArray[1]).isEqualTo((byte) 13);
+        assertThat(saltArray[2]).isEqualTo((byte) 14);
+    }
+
+    @Test
+    public void test_constructDataElement_privateIdentity() {
+        byte[] identityData = new byte[]{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16};
+        DataElement identity = new DataElement(DATA_TYPE_PRIVATE_IDENTITY, identityData);
+        byte[] identityArray = ExtendedAdvertisementUtils.convertDataElementToBytes(identity);
+        // Data length and identity header length.
+        assertThat(identityArray.length).isEqualTo(ExtendedAdvertisement.IDENTITY_DATA_LENGTH + 2);
+        // 1st header byte
+        assertThat(identityArray[0]).isEqualTo((byte) 0b10010000);
+        // 2st header byte
+        assertThat(identityArray[1]).isEqualTo((byte) 0b00000100);
+        // Data
+        assertThat(Arrays.copyOfRange(identityArray, 2, identityArray.length))
+                .isEqualTo(identityData);
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/presence/FastAdvertisementTest.java b/nearby/tests/unit/src/com/android/server/nearby/presence/FastAdvertisementTest.java
index 5e0ccbe..8e3e068 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/presence/FastAdvertisementTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/presence/FastAdvertisementTest.java
@@ -75,6 +75,15 @@
         assertThat(originalAdvertisement.getVersion()).isEqualTo(
                 BroadcastRequest.PRESENCE_VERSION_V0);
         assertThat(originalAdvertisement.getSalt()).isEqualTo(SALT);
+        assertThat(originalAdvertisement.getTxPower()).isEqualTo(TX_POWER);
+        assertThat(originalAdvertisement.toString())
+                .isEqualTo("FastAdvertisement:<VERSION: 0, length: 19,"
+                        + " ltvFieldCount: 4,"
+                        + " identityType: 1,"
+                        + " identity: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1],"
+                        + " salt: [2, 3],"
+                        + " actions: [123],"
+                        + " txPower: 4");
     }
 
     @Test
diff --git a/nearby/tests/unit/src/com/android/server/nearby/presence/PresenceDiscoveryResultTest.java b/nearby/tests/unit/src/com/android/server/nearby/presence/PresenceDiscoveryResultTest.java
index 39cab94..856c1a8 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/presence/PresenceDiscoveryResultTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/presence/PresenceDiscoveryResultTest.java
@@ -18,6 +18,8 @@
 
 import static com.google.common.truth.Truth.assertThat;
 
+import android.nearby.DataElement;
+import android.nearby.NearbyDeviceParcelable;
 import android.nearby.PresenceCredential;
 import android.nearby.PresenceDevice;
 import android.nearby.PresenceScanFilter;
@@ -28,12 +30,15 @@
 import org.junit.Before;
 import org.junit.Test;
 
-import java.util.Arrays;
+import java.util.ArrayList;
+import java.util.List;
 
 /**
  * Unit tests for {@link PresenceDiscoveryResult}.
  */
 public class PresenceDiscoveryResultTest {
+    private static final int DATA_TYPE_ACCOUNT_KEY = 9;
+    private static final int DATA_TYPE_INTENT = 6;
     private static final int PRESENCE_ACTION = 123;
     private static final int TX_POWER = -1;
     private static final int RSSI = -41;
@@ -43,6 +48,8 @@
     private static final byte[] PUBLIC_KEY = new byte[]{1, 1, 2, 2};
     private static final byte[] ENCRYPTED_METADATA = new byte[]{1, 2, 3, 4, 5};
     private static final byte[] METADATA_ENCRYPTION_KEY_TAG = new byte[]{1, 1, 3, 4, 5};
+    private static final byte[] META_DATA_ENCRYPTION_KEY =
+            new byte[] {-39, -55, 115, 78, -57, 40, 115, 0, -112, 86, -86, 7, -42, 68, 11, 12};
 
     private PresenceDiscoveryResult.Builder mBuilder;
     private PublicCredential mCredential;
@@ -59,18 +66,68 @@
                 .setSalt(SALT)
                 .setTxPower(TX_POWER)
                 .setRssi(RSSI)
+                .setEncryptedIdentityTag(METADATA_ENCRYPTION_KEY_TAG)
                 .addPresenceAction(PRESENCE_ACTION);
     }
 
     @Test
     @SdkSuppress(minSdkVersion = 32, codeName = "T")
-    public void testToDevice() {
-        PresenceDiscoveryResult discoveryResult = mBuilder.build();
-        PresenceDevice presenceDevice = discoveryResult.toPresenceDevice();
+    public void testFromDevice() {
+        NearbyDeviceParcelable.Builder builder = new NearbyDeviceParcelable.Builder();
+        builder.setTxPower(TX_POWER)
+                .setRssi(RSSI)
+                .setEncryptionKeyTag(METADATA_ENCRYPTION_KEY_TAG)
+                .setSalt(SALT)
+                .setPublicCredential(mCredential);
 
-        assertThat(presenceDevice.getRssi()).isEqualTo(RSSI);
-        assertThat(Arrays.equals(presenceDevice.getSalt(), SALT)).isTrue();
-        assertThat(Arrays.equals(presenceDevice.getSecretId(), SECRET_ID)).isTrue();
+        PresenceDiscoveryResult discoveryResult =
+                PresenceDiscoveryResult.fromDevice(builder.build());
+        PresenceScanFilter scanFilter = new PresenceScanFilter.Builder()
+                .setMaxPathLoss(80)
+                .addCredential(mCredential)
+                .build();
+
+        assertThat(discoveryResult.matches(scanFilter)).isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testFromDevice_presenceDeviceAvailable() {
+        NearbyDeviceParcelable.Builder builder = new NearbyDeviceParcelable.Builder();
+        PresenceDevice presenceDevice =
+                new PresenceDevice.Builder("123", SALT, SECRET_ID, META_DATA_ENCRYPTION_KEY)
+                        .addExtendedProperty(new DataElement(
+                                DATA_TYPE_INTENT, new byte[]{(byte) PRESENCE_ACTION}))
+                        .build();
+        builder.setTxPower(TX_POWER)
+                .setRssi(RSSI)
+                .setEncryptionKeyTag(METADATA_ENCRYPTION_KEY_TAG)
+                .setPresenceDevice(presenceDevice)
+                .setPublicCredential(mCredential);
+
+        PresenceDiscoveryResult discoveryResult =
+                PresenceDiscoveryResult.fromDevice(builder.build());
+        PresenceScanFilter scanFilter = new PresenceScanFilter.Builder()
+                .setMaxPathLoss(80)
+                .addPresenceAction(PRESENCE_ACTION)
+                .addCredential(mCredential)
+                .build();
+
+        assertThat(discoveryResult.matches(scanFilter)).isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testAccountMatches() {
+        DataElement accountKey = new DataElement(DATA_TYPE_ACCOUNT_KEY, new byte[]{1, 2, 3, 4});
+        mBuilder.addExtendedProperties(List.of(accountKey));
+        PresenceDiscoveryResult discoveryResult = mBuilder.build();
+
+        List<DataElement> extendedProperties = new ArrayList<>();
+        extendedProperties.add(new DataElement(DATA_TYPE_ACCOUNT_KEY, new byte[]{1, 2, 3, 4}));
+        extendedProperties.add(new DataElement(DATA_TYPE_INTENT,
+                new byte[]{(byte) PRESENCE_ACTION}));
+        assertThat(discoveryResult.accountKeyMatches(extendedProperties)).isTrue();
     }
 
     @Test
@@ -86,4 +143,24 @@
         assertThat(discoveryResult.matches(scanFilter)).isTrue();
     }
 
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_notMatches() {
+        PresenceDiscoveryResult.Builder builder = new PresenceDiscoveryResult.Builder()
+                .setPublicCredential(mCredential)
+                .setSalt(SALT)
+                .setTxPower(TX_POWER)
+                .setRssi(RSSI)
+                .setEncryptedIdentityTag(new byte[]{5, 4, 3, 2, 1})
+                .addPresenceAction(PRESENCE_ACTION);
+
+        PresenceScanFilter scanFilter = new PresenceScanFilter.Builder()
+                .setMaxPathLoss(80)
+                .addPresenceAction(PRESENCE_ACTION)
+                .addCredential(mCredential)
+                .build();
+
+        PresenceDiscoveryResult discoveryResult = builder.build();
+        assertThat(discoveryResult.matches(scanFilter)).isFalse();
+    }
 }
diff --git a/nearby/tests/unit/src/com/android/server/nearby/presence/PresenceManagerTest.java b/nearby/tests/unit/src/com/android/server/nearby/presence/PresenceManagerTest.java
new file mode 100644
index 0000000..9deb1eb
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/presence/PresenceManagerTest.java
@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.presence;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.nearby.DataElement;
+import android.nearby.PresenceDevice;
+
+import androidx.test.filters.SdkSuppress;
+import androidx.test.platform.app.InstrumentationRegistry;
+
+import com.android.server.nearby.common.locator.LocatorContextWrapper;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+public class PresenceManagerTest {
+    private static final byte[] IDENTITY =
+            new byte[] {1, 2, 3, 4, 1, 2, 3, 4, 1, 2, 3, 4, 1, 2, 3, 4};
+    private static final byte[] SALT = {2, 3};
+    private static final byte[] SECRET_ID =
+            new byte[] {-97, 10, 107, -86, 25, 65, -54, -95, -72, 59, 54, 93, 9, 3, -24, -88};
+
+    @Mock private Context mContext;
+    private LocatorContextWrapper mLocatorContextWrapper;
+    private PresenceManager mPresenceManager;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+
+        mLocatorContextWrapper = new LocatorContextWrapper(mContext);
+        mPresenceManager = new PresenceManager(mLocatorContextWrapper);
+        when(mContext.getContentResolver())
+                .thenReturn(InstrumentationRegistry.getInstrumentation()
+                        .getContext().getContentResolver());
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testInit() {
+        mPresenceManager.initiate();
+
+        verify(mContext, times(1)).registerReceiver(any(), any());
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testDeviceStatusUpdated() {
+        DataElement dataElement1 = new DataElement(1, new byte[] {1, 2});
+        DataElement dataElement2 = new DataElement(2, new byte[] {-1, -2, 3, 4, 5, 6, 7, 8, 9});
+
+        PresenceDevice presenceDevice =
+                new PresenceDevice.Builder(/* deviceId= */ "deviceId", SALT, SECRET_ID, IDENTITY)
+                        .addExtendedProperty(dataElement1)
+                        .addExtendedProperty(dataElement2)
+                        .build();
+
+        mPresenceManager.mScanCallback.onDiscovered(presenceDevice);
+        mPresenceManager.mScanCallback.onUpdated(presenceDevice);
+        mPresenceManager.mScanCallback.onLost(presenceDevice);
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/provider/BleBroadcastProviderTest.java b/nearby/tests/unit/src/com/android/server/nearby/provider/BleBroadcastProviderTest.java
index d06a785..05b556b 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/provider/BleBroadcastProviderTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/provider/BleBroadcastProviderTest.java
@@ -16,6 +16,7 @@
 
 package com.android.server.nearby.provider;
 
+import static org.mockito.Mockito.atLeastOnce;
 import static org.mockito.Mockito.eq;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
@@ -24,12 +25,14 @@
 import android.bluetooth.BluetoothAdapter;
 import android.bluetooth.BluetoothManager;
 import android.bluetooth.le.AdvertiseSettings;
+import android.bluetooth.le.AdvertisingSetCallback;
 import android.content.Context;
+import android.hardware.location.ContextHubManager;
 import android.nearby.BroadcastCallback;
+import android.nearby.BroadcastRequest;
 
 import androidx.test.core.app.ApplicationProvider;
 
-import com.android.server.nearby.injector.ContextHubManagerAdapter;
 import com.android.server.nearby.injector.Injector;
 
 import com.google.common.util.concurrent.MoreExecutors;
@@ -59,9 +62,10 @@
     }
 
     @Test
-    public void testOnStatus_success() {
+    public void testOnStatus_success_fastAdv() {
         byte[] advertiseBytes = new byte[]{1, 2, 3, 4};
-        mBleBroadcastProvider.start(advertiseBytes, mBroadcastListener);
+        mBleBroadcastProvider.start(BroadcastRequest.PRESENCE_VERSION_V0,
+                advertiseBytes, mBroadcastListener);
 
         AdvertiseSettings settings = new AdvertiseSettings.Builder().build();
         mBleBroadcastProvider.onStartSuccess(settings);
@@ -69,15 +73,47 @@
     }
 
     @Test
-    public void testOnStatus_failure() {
+    public void testOnStatus_success_extendedAdv() {
         byte[] advertiseBytes = new byte[]{1, 2, 3, 4};
-        mBleBroadcastProvider.start(advertiseBytes, mBroadcastListener);
+        mBleBroadcastProvider.start(BroadcastRequest.PRESENCE_VERSION_V1,
+                advertiseBytes, mBroadcastListener);
+
+        // advertising set can not be mocked, so we will allow nulls
+        mBleBroadcastProvider.mAdvertisingSetCallback.onAdvertisingSetStarted(null, -30,
+                AdvertisingSetCallback.ADVERTISE_SUCCESS);
+        verify(mBroadcastListener).onStatusChanged(eq(BroadcastCallback.STATUS_OK));
+    }
+
+    @Test
+    public void testOnStatus_failure_fastAdv() {
+        byte[] advertiseBytes = new byte[]{1, 2, 3, 4};
+        mBleBroadcastProvider.start(BroadcastRequest.PRESENCE_VERSION_V0,
+                advertiseBytes, mBroadcastListener);
 
         mBleBroadcastProvider.onStartFailure(BroadcastCallback.STATUS_FAILURE);
         verify(mBroadcastListener, times(1))
                 .onStatusChanged(eq(BroadcastCallback.STATUS_FAILURE));
     }
 
+    @Test
+    public void testOnStatus_failure_extendedAdv() {
+        byte[] advertiseBytes = new byte[]{1, 2, 3, 4};
+        mBleBroadcastProvider.start(BroadcastRequest.PRESENCE_VERSION_V1,
+                advertiseBytes, mBroadcastListener);
+
+        // advertising set can not be mocked, so we will allow nulls
+        mBleBroadcastProvider.mAdvertisingSetCallback.onAdvertisingSetStarted(null, -30,
+                AdvertisingSetCallback.ADVERTISE_FAILED_INTERNAL_ERROR);
+        // Can be additional failure if the test device does not support LE Extended Advertising.
+        verify(mBroadcastListener, atLeastOnce())
+                .onStatusChanged(eq(BroadcastCallback.STATUS_FAILURE));
+    }
+
+    @Test
+    public void testStop() {
+        mBleBroadcastProvider.stop();
+    }
+
     private static class TestInjector implements Injector {
 
         @Override
@@ -88,7 +124,7 @@
         }
 
         @Override
-        public ContextHubManagerAdapter getContextHubManagerAdapter() {
+        public ContextHubManager getContextHubManager() {
             return null;
         }
 
diff --git a/nearby/tests/unit/src/com/android/server/nearby/provider/BleDiscoveryProviderTest.java b/nearby/tests/unit/src/com/android/server/nearby/provider/BleDiscoveryProviderTest.java
index 902cc33..9531c53 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/provider/BleDiscoveryProviderTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/provider/BleDiscoveryProviderTest.java
@@ -18,6 +18,8 @@
 
 import static android.bluetooth.le.ScanSettings.CALLBACK_TYPE_ALL_MATCHES;
 
+import static com.google.common.truth.Truth.assertThat;
+
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
@@ -30,10 +32,13 @@
 import android.bluetooth.le.ScanRecord;
 import android.bluetooth.le.ScanResult;
 import android.content.Context;
+import android.hardware.location.ContextHubManager;
+import android.nearby.PresenceScanFilter;
+import android.nearby.PublicCredential;
+import android.nearby.ScanFilter;
 
 import androidx.test.platform.app.InstrumentationRegistry;
 
-import com.android.server.nearby.injector.ContextHubManagerAdapter;
 import com.android.server.nearby.injector.Injector;
 
 import org.junit.Before;
@@ -42,6 +47,8 @@
 
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.List;
 
 public final class BleDiscoveryProviderTest {
 
@@ -70,6 +77,7 @@
         // Wait for callback to be invoked
         Thread.sleep(500);
         verify(mListener, times(1)).onNearbyDeviceDiscovered(any());
+        mBleDiscoveryProvider.getScanCallback().onScanFailed(1);
     }
 
     @Test
@@ -78,6 +86,22 @@
         mBleDiscoveryProvider.onStop();
     }
 
+    @Test
+    public void test_stopScan_filersReset() {
+        List<ScanFilter> filterList = new ArrayList<>();
+        filterList.add(getSanFilter());
+
+        mBleDiscoveryProvider.getController().setProviderScanFilters(filterList);
+        mBleDiscoveryProvider.onStart();
+        mBleDiscoveryProvider.onStop();
+        assertThat(mBleDiscoveryProvider.mScanFilters).isEmpty();
+    }
+
+    @Test
+    public void testInvalidateScanMode() {
+        mBleDiscoveryProvider.invalidateScanMode();
+    }
+
     private class TestInjector implements Injector {
         @Override
         public BluetoothAdapter getBluetoothAdapter() {
@@ -85,7 +109,7 @@
         }
 
         @Override
-        public ContextHubManagerAdapter getContextHubManagerAdapter() {
+        public ContextHubManager getContextHubManager() {
             return null;
         }
 
@@ -125,4 +149,22 @@
             return null;
         }
     }
+
+    private static PresenceScanFilter getSanFilter() {
+        return new PresenceScanFilter.Builder()
+                .setMaxPathLoss(70)
+                .addCredential(getPublicCredential())
+                .addPresenceAction(124)
+                .build();
+    }
+
+    private static PublicCredential getPublicCredential() {
+        return new PublicCredential.Builder(
+                new byte[]{1, 2},
+                new byte[]{1, 2},
+                new byte[]{1, 2},
+                new byte[]{1, 2},
+                new byte[]{1, 2})
+                .build();
+    }
 }
diff --git a/nearby/tests/unit/src/com/android/server/nearby/provider/BroadcastProviderManagerTest.java b/nearby/tests/unit/src/com/android/server/nearby/provider/BroadcastProviderManagerTest.java
index d45d570..0179901 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/provider/BroadcastProviderManagerTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/provider/BroadcastProviderManagerTest.java
@@ -101,8 +101,13 @@
     @Test
     public void testStartAdvertising() {
         mBroadcastProviderManager.startBroadcast(mBroadcastRequest, mBroadcastListener);
-        verify(mBleBroadcastProvider).start(any(byte[].class), any(
-                BleBroadcastProvider.BroadcastListener.class));
+        verify(mBleBroadcastProvider).start(eq(BroadcastRequest.PRESENCE_VERSION_V0),
+                any(byte[].class), any(BleBroadcastProvider.BroadcastListener.class));
+    }
+
+    @Test
+    public void testStopAdvertising() {
+        mBroadcastProviderManager.stopBroadcast(mBroadcastListener);
     }
 
     @Test
diff --git a/nearby/tests/unit/src/com/android/server/nearby/provider/ChreCommunicationTest.java b/nearby/tests/unit/src/com/android/server/nearby/provider/ChreCommunicationTest.java
index 1b29b52..2bc2be3 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/provider/ChreCommunicationTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/provider/ChreCommunicationTest.java
@@ -16,18 +16,21 @@
 
 package com.android.server.nearby.provider;
 
+import static com.google.common.truth.Truth.assertThat;
+
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
+import android.content.Context;
 import android.hardware.location.ContextHubClient;
 import android.hardware.location.ContextHubInfo;
+import android.hardware.location.ContextHubManager;
 import android.hardware.location.ContextHubTransaction;
 import android.hardware.location.NanoAppMessage;
 import android.hardware.location.NanoAppState;
 
-import com.android.server.nearby.injector.ContextHubManagerAdapter;
 import com.android.server.nearby.injector.Injector;
 
 import org.junit.Before;
@@ -43,7 +46,8 @@
 
 public class ChreCommunicationTest {
     @Mock Injector mInjector;
-    @Mock ContextHubManagerAdapter mManager;
+    @Mock Context mContext;
+    @Mock ContextHubManager mManager;
     @Mock ContextHubTransaction<List<NanoAppState>> mTransaction;
     @Mock ContextHubTransaction.Response<List<NanoAppState>> mTransactionResponse;
     @Mock ContextHubClient mClient;
@@ -57,17 +61,17 @@
     @Before
     public void setUp() {
         MockitoAnnotations.initMocks(this);
-        when(mInjector.getContextHubManagerAdapter()).thenReturn(mManager);
+        when(mInjector.getContextHubManager()).thenReturn(mManager);
         when(mManager.getContextHubs()).thenReturn(Collections.singletonList(new ContextHubInfo()));
         when(mManager.queryNanoApps(any())).thenReturn(mTransaction);
-        when(mManager.createClient(any(), any(), any())).thenReturn(mClient);
+        when(mManager.createClient(any(), any(), any(), any())).thenReturn(mClient);
         when(mTransactionResponse.getResult()).thenReturn(ContextHubTransaction.RESULT_SUCCESS);
         when(mTransactionResponse.getContents())
                 .thenReturn(
                         Collections.singletonList(
                                 new NanoAppState(ChreDiscoveryProvider.NANOAPP_ID, 1, true)));
 
-        mChreCommunication = new ChreCommunication(mInjector, new InlineExecutor());
+        mChreCommunication = new ChreCommunication(mInjector, mContext, new InlineExecutor());
         mChreCommunication.start(
                 mChreCallback, Collections.singleton(ChreDiscoveryProvider.NANOAPP_ID));
 
@@ -106,6 +110,50 @@
                         new byte[] {1, 2, 3});
         mChreCommunication.onMessageFromNanoApp(mClient, message);
         verify(mChreCallback).onMessageFromNanoApp(eq(message));
+
+    }
+
+    @Test
+    public void testContextHubTransactionResultToString() {
+        assertThat(
+                mChreCommunication.contextHubTransactionResultToString(
+                        ContextHubTransaction.RESULT_SUCCESS))
+                .isEqualTo("RESULT_SUCCESS");
+        assertThat(
+                mChreCommunication.contextHubTransactionResultToString(
+                        ContextHubTransaction.RESULT_FAILED_UNKNOWN))
+                .isEqualTo("RESULT_FAILED_UNKNOWN");
+        assertThat(
+                mChreCommunication.contextHubTransactionResultToString(
+                        ContextHubTransaction.RESULT_FAILED_BAD_PARAMS))
+                .isEqualTo("RESULT_FAILED_BAD_PARAMS");
+        assertThat(
+                mChreCommunication.contextHubTransactionResultToString(
+                        ContextHubTransaction.RESULT_FAILED_UNINITIALIZED))
+                .isEqualTo("RESULT_FAILED_UNINITIALIZED");
+        assertThat(
+                mChreCommunication.contextHubTransactionResultToString(
+                        ContextHubTransaction.RESULT_FAILED_BUSY))
+                .isEqualTo("RESULT_FAILED_BUSY");
+        assertThat(
+                mChreCommunication.contextHubTransactionResultToString(
+                        ContextHubTransaction.RESULT_FAILED_AT_HUB))
+                .isEqualTo("RESULT_FAILED_AT_HUB");
+        assertThat(
+                mChreCommunication.contextHubTransactionResultToString(
+                        ContextHubTransaction.RESULT_FAILED_TIMEOUT))
+                .isEqualTo("RESULT_FAILED_TIMEOUT");
+        assertThat(
+                mChreCommunication.contextHubTransactionResultToString(
+                        ContextHubTransaction.RESULT_FAILED_SERVICE_INTERNAL_FAILURE))
+                .isEqualTo("RESULT_FAILED_SERVICE_INTERNAL_FAILURE");
+        assertThat(
+                mChreCommunication.contextHubTransactionResultToString(
+                        ContextHubTransaction.RESULT_FAILED_HAL_UNAVAILABLE))
+                .isEqualTo("RESULT_FAILED_HAL_UNAVAILABLE");
+        assertThat(
+                mChreCommunication.contextHubTransactionResultToString(9))
+                .isEqualTo("UNKNOWN_RESULT value=9");
     }
 
     @Test
diff --git a/nearby/tests/unit/src/com/android/server/nearby/provider/ChreDiscoveryProviderTest.java b/nearby/tests/unit/src/com/android/server/nearby/provider/ChreDiscoveryProviderTest.java
index 7c0dd92..270de52 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/provider/ChreDiscoveryProviderTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/provider/ChreDiscoveryProviderTest.java
@@ -16,16 +16,21 @@
 
 package com.android.server.nearby.provider;
 
+import static com.google.common.truth.Truth.assertThat;
+
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.Mockito.verify;
 
 import android.content.Context;
 import android.hardware.location.NanoAppMessage;
-import android.nearby.ScanFilter;
+import android.nearby.DataElement;
+import android.nearby.NearbyDeviceParcelable;
 
 import androidx.test.filters.SdkSuppress;
 import androidx.test.platform.app.InstrumentationRegistry;
 
+import com.android.server.nearby.presence.PresenceDiscoveryResult;
+
 import com.google.protobuf.ByteString;
 
 import org.junit.Before;
@@ -35,17 +40,25 @@
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 
-import service.proto.Blefilter;
-
 import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.Executor;
 
+import service.proto.Blefilter;
+
 public class ChreDiscoveryProviderTest {
     @Mock AbstractDiscoveryProvider.Listener mListener;
     @Mock ChreCommunication mChreCommunication;
 
     @Captor ArgumentCaptor<ChreCommunication.ContextHubCommsCallback> mChreCallbackCaptor;
+    @Captor ArgumentCaptor<NearbyDeviceParcelable> mNearbyDevice;
+
+    private static final int DATA_TYPE_CONNECTION_STATUS_KEY = 10;
+    private static final int DATA_TYPE_BATTERY_KEY = 11;
+    private static final int DATA_TYPE_TX_POWER_KEY = 5;
+    private static final int DATA_TYPE_BLUETOOTH_ADDR_KEY = 101;
+    private static final int DATA_TYPE_FP_ACCOUNT_KEY = 9;
+    private static final int DATA_TYPE_BLE_SERVICE_DATA_KEY = 100;
 
     private ChreDiscoveryProvider mChreDiscoveryProvider;
 
@@ -59,13 +72,10 @@
 
     @Test
     @SdkSuppress(minSdkVersion = 32, codeName = "T")
-    public void testOnStart() {
-        List<ScanFilter> scanFilters = new ArrayList<>();
-        mChreDiscoveryProvider.getController().setProviderScanFilters(scanFilters);
-        mChreDiscoveryProvider.onStart();
+    public void testInit() {
+        mChreDiscoveryProvider.init();
         verify(mChreCommunication).start(mChreCallbackCaptor.capture(), any());
         mChreCallbackCaptor.getValue().started(true);
-        verify(mChreCommunication).sendMessageToNanoApp(any());
     }
 
     @Test
@@ -93,12 +103,92 @@
                         ChreDiscoveryProvider.NANOAPP_MESSAGE_TYPE_FILTER_RESULT,
                         results.toByteArray());
         mChreDiscoveryProvider.getController().setListener(mListener);
+        mChreDiscoveryProvider.init();
         mChreDiscoveryProvider.onStart();
         verify(mChreCommunication).start(mChreCallbackCaptor.capture(), any());
         mChreCallbackCaptor.getValue().onMessageFromNanoApp(chre_message);
         verify(mListener).onNearbyDeviceDiscovered(any());
     }
 
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testOnNearbyDeviceDiscoveredWithDataElements() {
+        final byte [] connectionStatus = new byte[] {1, 2, 3};
+        final byte [] batteryStatus = new byte[] {4, 5, 6};
+        final byte [] txPower = new byte[] {2};
+        final byte [] bluetoothAddr = new byte[] {1, 2, 3, 4, 5, 6};
+        final byte [] fastPairAccountKey = new byte[16];
+        // First byte is length of service data, padding zeros should be thrown away.
+        final byte [] bleServiceData = new byte[] {5, 1, 2, 3, 4, 5, 0, 0, 0, 0};
+
+        final List<DataElement> expectedExtendedProperties = new ArrayList<>();
+        expectedExtendedProperties.add(new DataElement(DATA_TYPE_CONNECTION_STATUS_KEY,
+                connectionStatus));
+        expectedExtendedProperties.add(new DataElement(DATA_TYPE_BATTERY_KEY, batteryStatus));
+        expectedExtendedProperties.add(new DataElement(DATA_TYPE_TX_POWER_KEY, txPower));
+        expectedExtendedProperties.add(
+                new DataElement(DATA_TYPE_BLUETOOTH_ADDR_KEY, bluetoothAddr));
+        expectedExtendedProperties.add(
+                new DataElement(DATA_TYPE_FP_ACCOUNT_KEY, fastPairAccountKey));
+        expectedExtendedProperties.add(
+                new DataElement(DATA_TYPE_BLE_SERVICE_DATA_KEY, new byte[] {1, 2, 3, 4, 5}));
+
+        Blefilter.PublicCredential credential =
+                Blefilter.PublicCredential.newBuilder()
+                        .setSecretId(ByteString.copyFrom(new byte[] {1}))
+                        .setAuthenticityKey(ByteString.copyFrom(new byte[2]))
+                        .setPublicKey(ByteString.copyFrom(new byte[3]))
+                        .setEncryptedMetadata(ByteString.copyFrom(new byte[4]))
+                        .setEncryptedMetadataTag(ByteString.copyFrom(new byte[5]))
+                        .build();
+        Blefilter.BleFilterResult result =
+                Blefilter.BleFilterResult.newBuilder()
+                        .setTxPower(2)
+                        .setRssi(1)
+                        .setBluetoothAddress(ByteString.copyFrom(bluetoothAddr))
+                        .setBleServiceData(ByteString.copyFrom(bleServiceData))
+                        .setPublicCredential(credential)
+                        .addDataElement(Blefilter.DataElement.newBuilder()
+                                .setKey(
+                                        Blefilter.DataElement.ElementType
+                                                .DE_CONNECTION_STATUS)
+                                .setValue(ByteString.copyFrom(connectionStatus))
+                                .setValueLength(connectionStatus.length)
+                        )
+                        .addDataElement(Blefilter.DataElement.newBuilder()
+                                .setKey(
+                                        Blefilter.DataElement.ElementType
+                                                .DE_BATTERY_STATUS)
+                                .setValue(ByteString.copyFrom(batteryStatus))
+                                .setValueLength(batteryStatus.length)
+                        )
+                        .addDataElement(Blefilter.DataElement.newBuilder()
+                                .setKey(
+                                        Blefilter.DataElement.ElementType
+                                                .DE_FAST_PAIR_ACCOUNT_KEY)
+                                .setValue(ByteString.copyFrom(fastPairAccountKey))
+                                .setValueLength(fastPairAccountKey.length)
+                        )
+                        .build();
+        Blefilter.BleFilterResults results =
+                Blefilter.BleFilterResults.newBuilder().addResult(result).build();
+        NanoAppMessage chre_message =
+                NanoAppMessage.createMessageToNanoApp(
+                        ChreDiscoveryProvider.NANOAPP_ID,
+                        ChreDiscoveryProvider.NANOAPP_MESSAGE_TYPE_FILTER_RESULT,
+                        results.toByteArray());
+        mChreDiscoveryProvider.getController().setListener(mListener);
+        mChreDiscoveryProvider.init();
+        mChreDiscoveryProvider.onStart();
+        verify(mChreCommunication).start(mChreCallbackCaptor.capture(), any());
+        mChreCallbackCaptor.getValue().onMessageFromNanoApp(chre_message);
+        verify(mListener).onNearbyDeviceDiscovered(mNearbyDevice.capture());
+
+        List<DataElement> extendedProperties = PresenceDiscoveryResult
+                .fromDevice(mNearbyDevice.getValue()).getExtendedProperties();
+        assertThat(extendedProperties).containsExactlyElementsIn(expectedExtendedProperties);
+    }
+
     private static class InLineExecutor implements Executor {
         @Override
         public void execute(Runnable command) {
diff --git a/nearby/tests/unit/src/com/android/server/nearby/provider/DiscoveryProviderManagerTest.java b/nearby/tests/unit/src/com/android/server/nearby/provider/DiscoveryProviderManagerTest.java
new file mode 100644
index 0000000..8591b60
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/provider/DiscoveryProviderManagerTest.java
@@ -0,0 +1,261 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.provider;
+
+import static android.nearby.PresenceCredential.IDENTITY_TYPE_PRIVATE;
+import static android.nearby.ScanRequest.SCAN_TYPE_NEARBY_PRESENCE;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.atLeastOnce;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.app.AppOpsManager;
+import android.content.Context;
+import android.nearby.DataElement;
+import android.nearby.IScanListener;
+import android.nearby.NearbyDeviceParcelable;
+import android.nearby.PresenceScanFilter;
+import android.nearby.PublicCredential;
+import android.nearby.ScanRequest;
+import android.os.IBinder;
+
+import com.android.server.nearby.injector.Injector;
+import com.android.server.nearby.util.identity.CallerIdentity;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class DiscoveryProviderManagerTest {
+    private static final int SCAN_MODE_CHRE_ONLY = 3;
+    private static final int DATA_TYPE_SCAN_MODE = 102;
+
+    @Mock Injector mInjector;
+    @Mock Context mContext;
+    @Mock AppOpsManager mAppOpsManager;
+    @Mock BleDiscoveryProvider mBleDiscoveryProvider;
+    @Mock ChreDiscoveryProvider mChreDiscoveryProvider;
+    @Mock DiscoveryProviderController mBluetoothController;
+    @Mock DiscoveryProviderController mChreController;
+    @Mock IScanListener mScanListener;
+    @Mock CallerIdentity mCallerIdentity;
+    @Mock DiscoveryProviderManager.ScanListenerDeathRecipient mScanListenerDeathRecipient;
+    @Mock IBinder mIBinder;
+
+    private DiscoveryProviderManager mDiscoveryProviderManager;
+    private Map<IBinder, DiscoveryProviderManager.ScanListenerRecord>
+            mScanTypeScanListenerRecordMap;
+
+    private static final int RSSI = -60;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+        when(mInjector.getAppOpsManager()).thenReturn(mAppOpsManager);
+        when(mBleDiscoveryProvider.getController()).thenReturn(mBluetoothController);
+        when(mChreDiscoveryProvider.getController()).thenReturn(mChreController);
+
+        mScanTypeScanListenerRecordMap = new HashMap<>();
+        mDiscoveryProviderManager =
+                new DiscoveryProviderManager(mContext, mInjector, mBleDiscoveryProvider,
+                        mChreDiscoveryProvider,
+                        mScanTypeScanListenerRecordMap);
+    }
+
+    @Test
+    public void testOnNearbyDeviceDiscovered() {
+        NearbyDeviceParcelable nearbyDeviceParcelable = new NearbyDeviceParcelable.Builder()
+                .setScanType(SCAN_TYPE_NEARBY_PRESENCE)
+                .build();
+        mDiscoveryProviderManager.onNearbyDeviceDiscovered(nearbyDeviceParcelable);
+    }
+
+    @Test
+    public void testInvalidateProviderScanMode() {
+        mDiscoveryProviderManager.invalidateProviderScanMode();
+    }
+
+    @Test
+    public void testStartProviders_chreOnlyChreAvailable_bleProviderNotStarted() {
+        when(mChreDiscoveryProvider.available()).thenReturn(true);
+
+        ScanRequest scanRequest = new ScanRequest.Builder()
+                .setScanType(SCAN_TYPE_NEARBY_PRESENCE)
+                .addScanFilter(getChreOnlyPresenceScanFilter()).build();
+        DiscoveryProviderManager.ScanListenerRecord record =
+                new DiscoveryProviderManager.ScanListenerRecord(scanRequest, mScanListener,
+                        mCallerIdentity, mScanListenerDeathRecipient);
+        mScanTypeScanListenerRecordMap.put(mIBinder, record);
+
+        Boolean start = mDiscoveryProviderManager.startProviders(scanRequest);
+        verify(mBluetoothController, never()).start();
+        assertThat(start).isTrue();
+    }
+
+    @Test
+    public void testStartProviders_chreOnlyChreAvailable_multipleFilters_bleProviderNotStarted() {
+        when(mChreDiscoveryProvider.available()).thenReturn(true);
+
+        ScanRequest scanRequest = new ScanRequest.Builder()
+                .setScanType(SCAN_TYPE_NEARBY_PRESENCE)
+                .addScanFilter(getChreOnlyPresenceScanFilter())
+                .addScanFilter(getPresenceScanFilter()).build();
+        DiscoveryProviderManager.ScanListenerRecord record =
+                new DiscoveryProviderManager.ScanListenerRecord(scanRequest, mScanListener,
+                        mCallerIdentity, mScanListenerDeathRecipient);
+        mScanTypeScanListenerRecordMap.put(mIBinder, record);
+
+        Boolean start = mDiscoveryProviderManager.startProviders(scanRequest);
+        verify(mBluetoothController, never()).start();
+        assertThat(start).isTrue();
+    }
+
+    @Test
+    public void testStartProviders_chreOnlyChreUnavailable_bleProviderNotStarted() {
+        when(mChreDiscoveryProvider.available()).thenReturn(false);
+
+        ScanRequest scanRequest = new ScanRequest.Builder()
+                .setScanType(SCAN_TYPE_NEARBY_PRESENCE)
+                .addScanFilter(getChreOnlyPresenceScanFilter()).build();
+        DiscoveryProviderManager.ScanListenerRecord record =
+                new DiscoveryProviderManager.ScanListenerRecord(scanRequest, mScanListener,
+                        mCallerIdentity, mScanListenerDeathRecipient);
+        mScanTypeScanListenerRecordMap.put(mIBinder, record);
+
+        Boolean start = mDiscoveryProviderManager.startProviders(scanRequest);
+        verify(mBluetoothController, never()).start();
+        assertThat(start).isFalse();
+    }
+
+    @Test
+    public void testStartProviders_notChreOnlyChreAvailable_bleProviderNotStarted() {
+        when(mChreDiscoveryProvider.available()).thenReturn(true);
+
+        ScanRequest scanRequest = new ScanRequest.Builder()
+                .setScanType(SCAN_TYPE_NEARBY_PRESENCE)
+                .addScanFilter(getPresenceScanFilter()).build();
+        DiscoveryProviderManager.ScanListenerRecord record =
+                new DiscoveryProviderManager.ScanListenerRecord(scanRequest, mScanListener,
+                        mCallerIdentity, mScanListenerDeathRecipient);
+        mScanTypeScanListenerRecordMap.put(mIBinder, record);
+
+        Boolean start = mDiscoveryProviderManager.startProviders(scanRequest);
+        verify(mBluetoothController, never()).start();
+        assertThat(start).isTrue();
+    }
+
+    @Test
+    public void testStartProviders_notChreOnlyChreUnavailable_bleProviderStarted() {
+        when(mChreDiscoveryProvider.available()).thenReturn(false);
+
+        ScanRequest scanRequest = new ScanRequest.Builder()
+                .setScanType(SCAN_TYPE_NEARBY_PRESENCE)
+                .addScanFilter(getPresenceScanFilter()).build();
+        DiscoveryProviderManager.ScanListenerRecord record =
+                new DiscoveryProviderManager.ScanListenerRecord(scanRequest, mScanListener,
+                        mCallerIdentity, mScanListenerDeathRecipient);
+        mScanTypeScanListenerRecordMap.put(mIBinder, record);
+
+        Boolean start = mDiscoveryProviderManager.startProviders(scanRequest);
+        verify(mBluetoothController, atLeastOnce()).start();
+        assertThat(start).isTrue();
+    }
+
+    @Test
+    public void testStartProviders_chreOnlyChreUndetermined_bleProviderNotStarted() {
+        when(mChreDiscoveryProvider.available()).thenReturn(null);
+
+        ScanRequest scanRequest = new ScanRequest.Builder()
+                .setScanType(SCAN_TYPE_NEARBY_PRESENCE)
+                .addScanFilter(getChreOnlyPresenceScanFilter()).build();
+        DiscoveryProviderManager.ScanListenerRecord record =
+                new DiscoveryProviderManager.ScanListenerRecord(scanRequest, mScanListener,
+                        mCallerIdentity, mScanListenerDeathRecipient);
+        mScanTypeScanListenerRecordMap.put(mIBinder, record);
+
+        Boolean start = mDiscoveryProviderManager.startProviders(scanRequest);
+        verify(mBluetoothController, never()).start();
+        assertThat(start).isNull();
+    }
+
+    @Test
+    public void testStartProviders_notChreOnlyChreUndetermined_bleProviderStarted() {
+        when(mChreDiscoveryProvider.available()).thenReturn(null);
+
+        ScanRequest scanRequest = new ScanRequest.Builder()
+                .setScanType(SCAN_TYPE_NEARBY_PRESENCE)
+                .addScanFilter(getPresenceScanFilter()).build();
+        DiscoveryProviderManager.ScanListenerRecord record =
+                new DiscoveryProviderManager.ScanListenerRecord(scanRequest, mScanListener,
+                        mCallerIdentity, mScanListenerDeathRecipient);
+        mScanTypeScanListenerRecordMap.put(mIBinder, record);
+
+        Boolean start = mDiscoveryProviderManager.startProviders(scanRequest);
+        verify(mBluetoothController, atLeastOnce()).start();
+        assertThat(start).isTrue();
+    }
+
+    private static PresenceScanFilter getPresenceScanFilter() {
+        final byte[] secretId = new byte[]{1, 2, 3, 4};
+        final byte[] authenticityKey = new byte[]{0, 1, 1, 1};
+        final byte[] publicKey = new byte[]{1, 1, 2, 2};
+        final byte[] encryptedMetadata = new byte[]{1, 2, 3, 4, 5};
+        final byte[] metadataEncryptionKeyTag = new byte[]{1, 1, 3, 4, 5};
+
+        PublicCredential credential = new PublicCredential.Builder(
+                secretId, authenticityKey, publicKey, encryptedMetadata, metadataEncryptionKeyTag)
+                .setIdentityType(IDENTITY_TYPE_PRIVATE)
+                .build();
+
+        final int action = 123;
+        return new PresenceScanFilter.Builder()
+                .addCredential(credential)
+                .setMaxPathLoss(RSSI)
+                .addPresenceAction(action)
+                .build();
+    }
+
+    private static PresenceScanFilter getChreOnlyPresenceScanFilter() {
+        final byte[] secretId = new byte[]{1, 2, 3, 4};
+        final byte[] authenticityKey = new byte[]{0, 1, 1, 1};
+        final byte[] publicKey = new byte[]{1, 1, 2, 2};
+        final byte[] encryptedMetadata = new byte[]{1, 2, 3, 4, 5};
+        final byte[] metadataEncryptionKeyTag = new byte[]{1, 1, 3, 4, 5};
+
+        PublicCredential credential = new PublicCredential.Builder(
+                secretId, authenticityKey, publicKey, encryptedMetadata, metadataEncryptionKeyTag)
+                .setIdentityType(IDENTITY_TYPE_PRIVATE)
+                .build();
+
+        final int action = 123;
+        DataElement scanModeElement = new DataElement(DATA_TYPE_SCAN_MODE,
+                new byte[]{SCAN_MODE_CHRE_ONLY});
+        return new PresenceScanFilter.Builder()
+                .addCredential(credential)
+                .setMaxPathLoss(RSSI)
+                .addPresenceAction(action)
+                .addExtendedProperty(scanModeElement)
+                .build();
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/provider/FastPairDataProviderTest.java b/nearby/tests/unit/src/com/android/server/nearby/provider/FastPairDataProviderTest.java
new file mode 100644
index 0000000..300efbd
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/provider/FastPairDataProviderTest.java
@@ -0,0 +1,376 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.provider;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.junit.Assert.assertThrows;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.doNothing;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.accounts.Account;
+import android.content.Context;
+import android.nearby.FastPairDataProviderService;
+import android.nearby.aidl.FastPairAccountDevicesMetadataRequestParcel;
+import android.nearby.aidl.FastPairAntispoofKeyDeviceMetadataParcel;
+import android.nearby.aidl.FastPairAntispoofKeyDeviceMetadataRequestParcel;
+import android.nearby.aidl.FastPairDeviceMetadataParcel;
+import android.nearby.aidl.FastPairEligibleAccountParcel;
+import android.nearby.aidl.FastPairEligibleAccountsRequestParcel;
+import android.nearby.aidl.FastPairManageAccountDeviceRequestParcel;
+import android.nearby.aidl.FastPairManageAccountRequestParcel;
+
+import androidx.test.filters.SdkSuppress;
+import androidx.test.platform.app.InstrumentationRegistry;
+
+import com.android.server.nearby.fastpair.footprint.FastPairUploadInfo;
+
+import com.google.common.collect.ImmutableList;
+import com.google.protobuf.ByteString;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import service.proto.Cache;
+import service.proto.FastPairString;
+import service.proto.Rpcs;
+
+public class FastPairDataProviderTest {
+
+    private static final Account ACCOUNT = new Account("abc@google.com", "type1");
+    private static final byte[] MODEL_ID = new byte[]{7, 9};
+    private static final int BLE_TX_POWER = 5;
+    private static final String CONNECT_SUCCESS_COMPANION_APP_INSTALLED =
+            "CONNECT_SUCCESS_COMPANION_APP_INSTALLED";
+    private static final String CONNECT_SUCCESS_COMPANION_APP_NOT_INSTALLED =
+            "CONNECT_SUCCESS_COMPANION_APP_NOT_INSTALLED";
+    private static final int DEVICE_TYPE = 1;
+    private static final String DOWNLOAD_COMPANION_APP_DESCRIPTION =
+            "DOWNLOAD_COMPANION_APP_DESCRIPTION";
+    private static final String FAIL_CONNECT_GOTO_SETTINGS_DESCRIPTION =
+            "FAIL_CONNECT_GOTO_SETTINGS_DESCRIPTION";
+    private static final byte[] IMAGE = new byte[]{7, 9};
+    private static final String IMAGE_URL = "IMAGE_URL";
+    private static final String INITIAL_NOTIFICATION_DESCRIPTION =
+            "INITIAL_NOTIFICATION_DESCRIPTION";
+    private static final String INITIAL_NOTIFICATION_DESCRIPTION_NO_ACCOUNT =
+            "INITIAL_NOTIFICATION_DESCRIPTION_NO_ACCOUNT";
+    private static final String INITIAL_PAIRING_DESCRIPTION = "INITIAL_PAIRING_DESCRIPTION";
+    private static final String INTENT_URI = "INTENT_URI";
+    private static final String OPEN_COMPANION_APP_DESCRIPTION = "OPEN_COMPANION_APP_DESCRIPTION";
+    private static final String RETRO_ACTIVE_PAIRING_DESCRIPTION =
+            "RETRO_ACTIVE_PAIRING_DESCRIPTION";
+    private static final String SUBSEQUENT_PAIRING_DESCRIPTION = "SUBSEQUENT_PAIRING_DESCRIPTION";
+    private static final float TRIGGER_DISTANCE = 111;
+    private static final String TRUE_WIRELESS_IMAGE_URL_CASE = "TRUE_WIRELESS_IMAGE_URL_CASE";
+    private static final String TRUE_WIRELESS_IMAGE_URL_LEFT_BUD =
+            "TRUE_WIRELESS_IMAGE_URL_LEFT_BUD";
+    private static final String TRUE_WIRELESS_IMAGE_URL_RIGHT_BUD =
+            "TRUE_WIRELESS_IMAGE_URL_RIGHT_BUD";
+    private static final String UNABLE_TO_CONNECT_DESCRIPTION = "UNABLE_TO_CONNECT_DESCRIPTION";
+    private static final String UNABLE_TO_CONNECT_TITLE = "UNABLE_TO_CONNECT_TITLE";
+    private static final String UPDATE_COMPANION_APP_DESCRIPTION =
+            "UPDATE_COMPANION_APP_DESCRIPTION";
+    private static final String WAIT_LAUNCH_COMPANION_APP_DESCRIPTION =
+            "WAIT_LAUNCH_COMPANION_APP_DESCRIPTION";
+    private static final byte[] ACCOUNT_KEY = new byte[]{3};
+    private static final byte[] SHA256_ACCOUNT_KEY_PUBLIC_ADDRESS = new byte[]{2, 8};
+    private static final byte[] ANTI_SPOOFING_KEY = new byte[]{4, 5, 6};
+    private static final String ACTION_URL = "ACTION_URL";
+    private static final String APP_NAME = "APP_NAME";
+    private static final byte[] AUTHENTICATION_PUBLIC_KEY_SEC_P256R1 = new byte[]{5, 7};
+    private static final String DESCRIPTION = "DESCRIPTION";
+    private static final String DEVICE_NAME = "DEVICE_NAME";
+    private static final String DISPLAY_URL = "DISPLAY_URL";
+    private static final long FIRST_OBSERVATION_TIMESTAMP_MILLIS = 8393L;
+    private static final String ICON_FIFE_URL = "ICON_FIFE_URL";
+    private static final byte[] ICON_PNG = new byte[]{2, 5};
+    private static final String ID = "ID";
+    private static final long LAST_OBSERVATION_TIMESTAMP_MILLIS = 934234L;
+    private static final String MAC_ADDRESS = "MAC_ADDRESS";
+    private static final String NAME = "NAME";
+    private static final String PACKAGE_NAME = "PACKAGE_NAME";
+    private static final long PENDING_APP_INSTALL_TIMESTAMP_MILLIS = 832393L;
+    private static final int RSSI = 9;
+    private static final String TITLE = "TITLE";
+    private static final String TRIGGER_ID = "TRIGGER_ID";
+    private static final int TX_POWER = 63;
+
+    @Mock ProxyFastPairDataProvider mProxyFastPairDataProvider;
+
+    FastPairDataProvider mFastPairDataProvider;
+    FastPairEligibleAccountParcel[] mFastPairEligibleAccountParcels =
+            { genHappyPathFastPairEligibleAccountParcel() };
+    FastPairAntispoofKeyDeviceMetadataParcel mFastPairAntispoofKeyDeviceMetadataParcel =
+            genHappyPathFastPairAntispoofKeyDeviceMetadataParcel();
+    FastPairUploadInfo mFastPairUploadInfo = genHappyPathFastPairUploadInfo();
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        Context context = InstrumentationRegistry.getInstrumentation().getContext();
+        mFastPairDataProvider = FastPairDataProvider.init(context);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testFailurePath_throwsException() throws IllegalStateException {
+        mFastPairDataProvider = FastPairDataProvider.getInstance();
+        assertThrows(
+                IllegalStateException.class,
+                () -> {
+                    mFastPairDataProvider.loadFastPairEligibleAccounts(); });
+        assertThrows(
+                IllegalStateException.class,
+                () -> {
+                    mFastPairDataProvider.loadFastPairAntispoofKeyDeviceMetadata(MODEL_ID); });
+        assertThrows(
+                IllegalStateException.class,
+                () -> {
+                    mFastPairDataProvider.loadFastPairDeviceWithAccountKey(ACCOUNT); });
+        assertThrows(
+                IllegalStateException.class,
+                () -> {
+                    mFastPairDataProvider.loadFastPairDeviceWithAccountKey(
+                            ACCOUNT, ImmutableList.of()); });
+        assertThrows(
+                IllegalStateException.class,
+                () -> {
+                    mFastPairDataProvider.optIn(ACCOUNT); });
+        assertThrows(
+                IllegalStateException.class,
+                () -> {
+                    mFastPairDataProvider.upload(ACCOUNT, mFastPairUploadInfo); });
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testLoadFastPairAntispoofKeyDeviceMetadata_receivesResponse()  {
+        mFastPairDataProvider.setProxyDataProvider(mProxyFastPairDataProvider);
+        when(mProxyFastPairDataProvider.loadFastPairAntispoofKeyDeviceMetadata(any()))
+                .thenReturn(mFastPairAntispoofKeyDeviceMetadataParcel);
+
+        mFastPairDataProvider.loadFastPairAntispoofKeyDeviceMetadata(MODEL_ID);
+        ArgumentCaptor<FastPairAntispoofKeyDeviceMetadataRequestParcel> captor =
+                ArgumentCaptor.forClass(FastPairAntispoofKeyDeviceMetadataRequestParcel.class);
+        verify(mProxyFastPairDataProvider).loadFastPairAntispoofKeyDeviceMetadata(captor.capture());
+        assertThat(captor.getValue().modelId).isSameInstanceAs(MODEL_ID);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testOptIn_finishesSuccessfully()  {
+        mFastPairDataProvider.setProxyDataProvider(mProxyFastPairDataProvider);
+        doNothing().when(mProxyFastPairDataProvider).manageFastPairAccount(any());
+        mFastPairDataProvider.optIn(ACCOUNT);
+        ArgumentCaptor<FastPairManageAccountRequestParcel> captor =
+                ArgumentCaptor.forClass(FastPairManageAccountRequestParcel.class);
+        verify(mProxyFastPairDataProvider).manageFastPairAccount(captor.capture());
+        assertThat(captor.getValue().account).isSameInstanceAs(ACCOUNT);
+        assertThat(captor.getValue().requestType).isEqualTo(
+                FastPairDataProviderService.MANAGE_REQUEST_ADD);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testUpload_finishesSuccessfully()  {
+        mFastPairDataProvider.setProxyDataProvider(mProxyFastPairDataProvider);
+        doNothing().when(mProxyFastPairDataProvider).manageFastPairAccountDevice(any());
+        mFastPairDataProvider.upload(ACCOUNT, mFastPairUploadInfo);
+        ArgumentCaptor<FastPairManageAccountDeviceRequestParcel> captor =
+                ArgumentCaptor.forClass(FastPairManageAccountDeviceRequestParcel.class);
+        verify(mProxyFastPairDataProvider).manageFastPairAccountDevice(captor.capture());
+        assertThat(captor.getValue().account).isSameInstanceAs(ACCOUNT);
+        assertThat(captor.getValue().requestType).isEqualTo(
+                FastPairDataProviderService.MANAGE_REQUEST_ADD);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testLoadFastPairEligibleAccounts_receivesOneAccount()  {
+        mFastPairDataProvider.setProxyDataProvider(mProxyFastPairDataProvider);
+        when(mProxyFastPairDataProvider.loadFastPairEligibleAccounts(any()))
+                .thenReturn(mFastPairEligibleAccountParcels);
+        assertThat(mFastPairDataProvider.loadFastPairEligibleAccounts().size())
+                .isEqualTo(1);
+        ArgumentCaptor<FastPairEligibleAccountsRequestParcel> captor =
+                ArgumentCaptor.forClass(FastPairEligibleAccountsRequestParcel.class);
+        verify(mProxyFastPairDataProvider).loadFastPairEligibleAccounts(captor.capture());
+        assertThat(captor.getValue()).isNotNull();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testLoadFastPairDeviceWithAccountKey_finishesSuccessfully()  {
+        mFastPairDataProvider.setProxyDataProvider(mProxyFastPairDataProvider);
+        when(mProxyFastPairDataProvider.loadFastPairAccountDevicesMetadata(any()))
+                .thenReturn(null);
+
+        mFastPairDataProvider.loadFastPairDeviceWithAccountKey(ACCOUNT);
+        ArgumentCaptor<FastPairAccountDevicesMetadataRequestParcel> captor =
+                ArgumentCaptor.forClass(FastPairAccountDevicesMetadataRequestParcel.class);
+        verify(mProxyFastPairDataProvider).loadFastPairAccountDevicesMetadata(captor.capture());
+        assertThat(captor.getValue().account).isSameInstanceAs(ACCOUNT);
+        assertThat(captor.getValue().deviceAccountKeys).isEmpty();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testLoadFastPairDeviceWithAccountKeyDeviceAccountKeys_finishesSuccessfully()  {
+        mFastPairDataProvider.setProxyDataProvider(mProxyFastPairDataProvider);
+        when(mProxyFastPairDataProvider.loadFastPairAccountDevicesMetadata(any()))
+                .thenReturn(null);
+
+        mFastPairDataProvider.loadFastPairDeviceWithAccountKey(
+                ACCOUNT, ImmutableList.of(ACCOUNT_KEY));
+        ArgumentCaptor<FastPairAccountDevicesMetadataRequestParcel> captor =
+                ArgumentCaptor.forClass(FastPairAccountDevicesMetadataRequestParcel.class);
+        verify(mProxyFastPairDataProvider).loadFastPairAccountDevicesMetadata(captor.capture());
+        assertThat(captor.getValue().account).isSameInstanceAs(ACCOUNT);
+        assertThat(captor.getValue().deviceAccountKeys.length).isEqualTo(1);
+        assertThat(captor.getValue().deviceAccountKeys[0].byteArray).isSameInstanceAs(ACCOUNT_KEY);
+    }
+
+    private static FastPairEligibleAccountParcel genHappyPathFastPairEligibleAccountParcel() {
+        FastPairEligibleAccountParcel parcel = new FastPairEligibleAccountParcel();
+        parcel.account = ACCOUNT;
+        parcel.optIn = true;
+
+        return parcel;
+    }
+
+    private static FastPairAntispoofKeyDeviceMetadataParcel
+                genHappyPathFastPairAntispoofKeyDeviceMetadataParcel() {
+        FastPairAntispoofKeyDeviceMetadataParcel parcel =
+                new FastPairAntispoofKeyDeviceMetadataParcel();
+        parcel.antispoofPublicKey = ANTI_SPOOFING_KEY;
+        parcel.deviceMetadata = genHappyPathFastPairDeviceMetadataParcel();
+
+        return parcel;
+    }
+
+    private static FastPairDeviceMetadataParcel genHappyPathFastPairDeviceMetadataParcel() {
+        FastPairDeviceMetadataParcel parcel = new FastPairDeviceMetadataParcel();
+
+        parcel.bleTxPower = BLE_TX_POWER;
+        parcel.connectSuccessCompanionAppInstalled = CONNECT_SUCCESS_COMPANION_APP_INSTALLED;
+        parcel.connectSuccessCompanionAppNotInstalled =
+                CONNECT_SUCCESS_COMPANION_APP_NOT_INSTALLED;
+        parcel.deviceType = DEVICE_TYPE;
+        parcel.downloadCompanionAppDescription = DOWNLOAD_COMPANION_APP_DESCRIPTION;
+        parcel.failConnectGoToSettingsDescription = FAIL_CONNECT_GOTO_SETTINGS_DESCRIPTION;
+        parcel.image = IMAGE;
+        parcel.imageUrl = IMAGE_URL;
+        parcel.initialNotificationDescription = INITIAL_NOTIFICATION_DESCRIPTION;
+        parcel.initialNotificationDescriptionNoAccount =
+                INITIAL_NOTIFICATION_DESCRIPTION_NO_ACCOUNT;
+        parcel.initialPairingDescription = INITIAL_PAIRING_DESCRIPTION;
+        parcel.intentUri = INTENT_URI;
+        parcel.name = NAME;
+        parcel.openCompanionAppDescription = OPEN_COMPANION_APP_DESCRIPTION;
+        parcel.retroactivePairingDescription = RETRO_ACTIVE_PAIRING_DESCRIPTION;
+        parcel.subsequentPairingDescription = SUBSEQUENT_PAIRING_DESCRIPTION;
+        parcel.triggerDistance = TRIGGER_DISTANCE;
+        parcel.trueWirelessImageUrlCase = TRUE_WIRELESS_IMAGE_URL_CASE;
+        parcel.trueWirelessImageUrlLeftBud = TRUE_WIRELESS_IMAGE_URL_LEFT_BUD;
+        parcel.trueWirelessImageUrlRightBud = TRUE_WIRELESS_IMAGE_URL_RIGHT_BUD;
+        parcel.unableToConnectDescription = UNABLE_TO_CONNECT_DESCRIPTION;
+        parcel.unableToConnectTitle = UNABLE_TO_CONNECT_TITLE;
+        parcel.updateCompanionAppDescription = UPDATE_COMPANION_APP_DESCRIPTION;
+        parcel.waitLaunchCompanionAppDescription = WAIT_LAUNCH_COMPANION_APP_DESCRIPTION;
+
+        return parcel;
+    }
+
+    private static Cache.StoredDiscoveryItem genHappyPathStoredDiscoveryItem() {
+        Cache.StoredDiscoveryItem.Builder storedDiscoveryItemBuilder =
+                Cache.StoredDiscoveryItem.newBuilder();
+        storedDiscoveryItemBuilder.setActionUrl(ACTION_URL);
+        storedDiscoveryItemBuilder.setActionUrlType(Cache.ResolvedUrlType.WEBPAGE);
+        storedDiscoveryItemBuilder.setAppName(APP_NAME);
+        storedDiscoveryItemBuilder.setAuthenticationPublicKeySecp256R1(
+                ByteString.copyFrom(AUTHENTICATION_PUBLIC_KEY_SEC_P256R1));
+        storedDiscoveryItemBuilder.setDescription(DESCRIPTION);
+        storedDiscoveryItemBuilder.setDeviceName(DEVICE_NAME);
+        storedDiscoveryItemBuilder.setDisplayUrl(DISPLAY_URL);
+        storedDiscoveryItemBuilder.setFirstObservationTimestampMillis(
+                FIRST_OBSERVATION_TIMESTAMP_MILLIS);
+        storedDiscoveryItemBuilder.setIconFifeUrl(ICON_FIFE_URL);
+        storedDiscoveryItemBuilder.setIconPng(ByteString.copyFrom(ICON_PNG));
+        storedDiscoveryItemBuilder.setId(ID);
+        storedDiscoveryItemBuilder.setLastObservationTimestampMillis(
+                LAST_OBSERVATION_TIMESTAMP_MILLIS);
+        storedDiscoveryItemBuilder.setMacAddress(MAC_ADDRESS);
+        storedDiscoveryItemBuilder.setPackageName(PACKAGE_NAME);
+        storedDiscoveryItemBuilder.setPendingAppInstallTimestampMillis(
+                PENDING_APP_INSTALL_TIMESTAMP_MILLIS);
+        storedDiscoveryItemBuilder.setRssi(RSSI);
+        storedDiscoveryItemBuilder.setState(Cache.StoredDiscoveryItem.State.STATE_ENABLED);
+        storedDiscoveryItemBuilder.setTitle(TITLE);
+        storedDiscoveryItemBuilder.setTriggerId(TRIGGER_ID);
+        storedDiscoveryItemBuilder.setTxPower(TX_POWER);
+
+        FastPairString.FastPairStrings.Builder stringsBuilder =
+                FastPairString.FastPairStrings.newBuilder();
+        stringsBuilder.setPairingFinishedCompanionAppInstalled(
+                CONNECT_SUCCESS_COMPANION_APP_INSTALLED);
+        stringsBuilder.setPairingFinishedCompanionAppNotInstalled(
+                CONNECT_SUCCESS_COMPANION_APP_NOT_INSTALLED);
+        stringsBuilder.setPairingFailDescription(
+                FAIL_CONNECT_GOTO_SETTINGS_DESCRIPTION);
+        stringsBuilder.setTapToPairWithAccount(
+                INITIAL_NOTIFICATION_DESCRIPTION);
+        stringsBuilder.setTapToPairWithoutAccount(
+                INITIAL_NOTIFICATION_DESCRIPTION_NO_ACCOUNT);
+        stringsBuilder.setInitialPairingDescription(INITIAL_PAIRING_DESCRIPTION);
+        stringsBuilder.setRetroactivePairingDescription(RETRO_ACTIVE_PAIRING_DESCRIPTION);
+        stringsBuilder.setSubsequentPairingDescription(SUBSEQUENT_PAIRING_DESCRIPTION);
+        stringsBuilder.setWaitAppLaunchDescription(WAIT_LAUNCH_COMPANION_APP_DESCRIPTION);
+        storedDiscoveryItemBuilder.setFastPairStrings(stringsBuilder.build());
+
+        Cache.FastPairInformation.Builder fpInformationBuilder =
+                Cache.FastPairInformation.newBuilder();
+        Rpcs.TrueWirelessHeadsetImages.Builder imagesBuilder =
+                Rpcs.TrueWirelessHeadsetImages.newBuilder();
+        imagesBuilder.setCaseUrl(TRUE_WIRELESS_IMAGE_URL_CASE);
+        imagesBuilder.setLeftBudUrl(TRUE_WIRELESS_IMAGE_URL_LEFT_BUD);
+        imagesBuilder.setRightBudUrl(TRUE_WIRELESS_IMAGE_URL_RIGHT_BUD);
+        fpInformationBuilder.setTrueWirelessImages(imagesBuilder.build());
+        fpInformationBuilder.setDeviceType(Rpcs.DeviceType.HEADPHONES);
+
+        storedDiscoveryItemBuilder.setFastPairInformation(fpInformationBuilder.build());
+        storedDiscoveryItemBuilder.setTxPower(TX_POWER);
+
+        storedDiscoveryItemBuilder.setIconPng(ByteString.copyFrom(ICON_PNG));
+        storedDiscoveryItemBuilder.setIconFifeUrl(ICON_FIFE_URL);
+        storedDiscoveryItemBuilder.setActionUrl(ACTION_URL);
+
+        return storedDiscoveryItemBuilder.build();
+    }
+
+    private static FastPairUploadInfo genHappyPathFastPairUploadInfo() {
+        return new FastPairUploadInfo(
+                genHappyPathStoredDiscoveryItem(),
+                ByteString.copyFrom(ACCOUNT_KEY),
+                ByteString.copyFrom(SHA256_ACCOUNT_KEY_PUBLIC_ADDRESS));
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/provider/UtilsTest.java b/nearby/tests/unit/src/com/android/server/nearby/provider/UtilsTest.java
index eeea319..35f87f1 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/provider/UtilsTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/provider/UtilsTest.java
@@ -110,8 +110,6 @@
     private static final byte[] ICON_PNG = new byte[]{2, 5};
     private static final String ID = "ID";
     private static final long LAST_OBSERVATION_TIMESTAMP_MILLIS = 934234L;
-    private static final int LAST_USER_EXPERIENCE = 1;
-    private static final long LOST_MILLIS = 393284L;
     private static final String MAC_ADDRESS = "MAC_ADDRESS";
     private static final String NAME = "NAME";
     private static final String PACKAGE_NAME = "PACKAGE_NAME";
@@ -121,7 +119,6 @@
     private static final String TITLE = "TITLE";
     private static final String TRIGGER_ID = "TRIGGER_ID";
     private static final int TX_POWER = 63;
-    private static final int TYPE = 1;
 
     @Test
     @SdkSuppress(minSdkVersion = 32, codeName = "T")
diff --git a/nearby/tests/unit/src/com/android/server/nearby/util/ArrayUtilsTest.java b/nearby/tests/unit/src/com/android/server/nearby/util/ArrayUtilsTest.java
new file mode 100644
index 0000000..0fe28df
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/util/ArrayUtilsTest.java
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.util;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import androidx.test.filters.SdkSuppress;
+
+import org.junit.Test;
+
+public final class ArrayUtilsTest {
+
+    private static final byte[] BYTES_ONE = new byte[] {7, 9};
+    private static final byte[] BYTES_TWO = new byte[] {8};
+    private static final byte[] BYTES_EMPTY = new byte[] {};
+    private static final byte[] BYTES_ALL = new byte[] {7, 9, 8};
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testConcatByteArraysNoInput() {
+        assertThat(ArrayUtils.concatByteArrays().length).isEqualTo(0);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testConcatByteArraysOneEmptyArray() {
+        assertThat(ArrayUtils.concatByteArrays(BYTES_EMPTY).length).isEqualTo(0);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testConcatByteArraysOneNonEmptyArray() {
+        assertThat(ArrayUtils.concatByteArrays(BYTES_ONE)).isEqualTo(BYTES_ONE);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testConcatByteArraysMultipleNonEmptyArrays() {
+        assertThat(ArrayUtils.concatByteArrays(BYTES_ONE, BYTES_TWO)).isEqualTo(BYTES_ALL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testConcatByteArraysMultipleArrays() {
+        assertThat(ArrayUtils.concatByteArrays(BYTES_ONE, BYTES_EMPTY, BYTES_TWO))
+                .isEqualTo(BYTES_ALL);
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/util/BroadcastPermissionsTest.java b/nearby/tests/unit/src/com/android/server/nearby/util/BroadcastPermissionsTest.java
index 1a22412..71ade2a 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/util/BroadcastPermissionsTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/util/BroadcastPermissionsTest.java
@@ -93,4 +93,9 @@
         assertThat(BroadcastPermissions.getPermissionLevel(mMockContext, UID, PID))
                 .isEqualTo(PERMISSION_BLUETOOTH_ADVERTISE);
     }
+
+    @Test
+    public void test_enforceBroadcastPermission() {
+        BroadcastPermissions.enforceBroadcastPermission(mMockContext, mCallerIdentity);
+    }
 }
diff --git a/nearby/tests/unit/src/com/android/server/nearby/util/DataUtilsTest.java b/nearby/tests/unit/src/com/android/server/nearby/util/DataUtilsTest.java
index f098600..a742b3d 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/util/DataUtilsTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/util/DataUtilsTest.java
@@ -57,10 +57,6 @@
     private static final String MESSAGE_RETROACTIVE_PAIR_DESCRIPTION = "message 7";
     private static final String MESSAGE_WAIT_LAUNCH_COMPANION_APP_DESCRIPTION = "message 8";
     private static final String MESSAGE_FAIL_CONNECT_DESCRIPTION = "message 9";
-    private static final String MESSAGE_FAST_PAIR_TV_CONNECT_DEVICE_NO_ACCOUNT_DESCRIPTION =
-            "message 10";
-    private static final String MESSAGE_ASSISTANT_HALF_SHEET_DESCRIPTION = "message 11";
-    private static final String MESSAGE_ASSISTANT_NOTIFICATION_DESCRIPTION = "message 12";
 
     @Test
     public void test_toScanFastPairStoreItem_withAccount() {
@@ -107,6 +103,24 @@
     public void test_toString() {
         Cache.ScanFastPairStoreItem item = DataUtils.toScanFastPairStoreItem(
                 createObservedDeviceResponse(), BLUETOOTH_ADDRESS, ACCOUNT);
+
+        assertThat(DataUtils.toString(item))
+                .isEqualTo("ScanFastPairStoreItem=[address:00:11:22:33:FF:EE, "
+                        + "actionUrl:intent:#Intent;action=cto_be_set%3AACTION_MAGIC_PAIR;"
+                        + "package=to_be_set;component=to_be_set;"
+                        + "to_be_set%3AEXTRA_COMPANION_APP=test_package;"
+                        + "end, deviceName:My device, "
+                        + "iconFifeUrl:device_image_url, "
+                        + "fastPairStrings:FastPairStrings[tapToPairWithAccount=message 1, "
+                        + "tapToPairWithoutAccount=message 2, "
+                        + "initialPairingDescription=message 3 My device, "
+                        + "pairingFinishedCompanionAppInstalled=message 4, "
+                        + "pairingFinishedCompanionAppNotInstalled=message 5, "
+                        + "subsequentPairingDescription=message 6, "
+                        + "retroactivePairingDescription=message 7, "
+                        + "waitAppLaunchDescription=message 8, "
+                        + "pairingFailDescription=message 9]]");
+
         FastPairStrings strings = item.getFastPairStrings();
 
         assertThat(DataUtils.toString(strings))
diff --git a/nearby/tests/unit/src/com/android/server/nearby/util/EnvironmentTest.java b/nearby/tests/unit/src/com/android/server/nearby/util/EnvironmentTest.java
new file mode 100644
index 0000000..e167cf4
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/util/EnvironmentTest.java
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.util;
+
+import org.junit.Test;
+
+public class EnvironmentTest {
+
+    @Test
+    public void getNearbyDirectory() {
+        Environment.getNearbyDirectory();
+        Environment.getNearbyDirectory(1);
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/util/encryption/CryptorImpIdentityV1Test.java b/nearby/tests/unit/src/com/android/server/nearby/util/encryption/CryptorImpIdentityV1Test.java
new file mode 100644
index 0000000..f0294fc
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/util/encryption/CryptorImpIdentityV1Test.java
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.util.encryption;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.util.Log;
+
+import org.junit.Test;
+
+import java.util.Arrays;
+
+public class CryptorImpIdentityV1Test {
+    private static final String TAG = "CryptorImpIdentityV1Test";
+    private static final byte[] SALT = new byte[] {102, 22};
+    private static final byte[] DATA =
+            new byte[] {107, -102, 101, 107, 20, 62, 2, 73, 113, 59, 8, -14, -58, 122};
+    private static final byte[] AUTHENTICITY_KEY =
+            new byte[] {-89, 88, -50, -42, -99, 57, 84, -24, 121, 1, -104, -8, -26, -73, -36, 100};
+
+    @Test
+    public void test_encrypt_decrypt() {
+        Cryptor identityCryptor = CryptorImpIdentityV1.getInstance();
+        byte[] encryptedData = identityCryptor.encrypt(DATA, SALT, AUTHENTICITY_KEY);
+
+        assertThat(identityCryptor.decrypt(encryptedData, SALT, AUTHENTICITY_KEY)).isEqualTo(DATA);
+    }
+
+    @Test
+    public void test_encryption() {
+        Cryptor identityCryptor = CryptorImpIdentityV1.getInstance();
+        byte[] encryptedData = identityCryptor.encrypt(DATA, SALT, AUTHENTICITY_KEY);
+
+        // for debugging
+        Log.d(TAG, "encrypted data is: " + Arrays.toString(encryptedData));
+
+        assertThat(encryptedData).isEqualTo(getEncryptedData());
+    }
+
+    @Test
+    public void test_decryption() {
+        Cryptor identityCryptor = CryptorImpIdentityV1.getInstance();
+        byte[] decryptedData =
+                identityCryptor.decrypt(getEncryptedData(), SALT, AUTHENTICITY_KEY);
+        // for debugging
+        Log.d(TAG, "decrypted data is: " + Arrays.toString(decryptedData));
+
+        assertThat(decryptedData).isEqualTo(DATA);
+    }
+
+    @Test
+    public void generateHmacTag() {
+        CryptorImpIdentityV1 identityCryptor = CryptorImpIdentityV1.getInstance();
+        byte[] generatedTag = identityCryptor.sign(DATA);
+        byte[] expectedTag = new byte[]{50, 116, 95, -87, 63, 123, -79, -43};
+        assertThat(generatedTag).isEqualTo(expectedTag);
+    }
+
+    private static byte[] getEncryptedData() {
+        return new byte[]{6, -31, -32, -123, 43, -92, -47, -110, -65, 126, -15, -51, -19, -43};
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/util/encryption/CryptorImpV1Test.java b/nearby/tests/unit/src/com/android/server/nearby/util/encryption/CryptorImpV1Test.java
new file mode 100644
index 0000000..3ca2575
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/util/encryption/CryptorImpV1Test.java
@@ -0,0 +1,114 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.util.encryption;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.util.Log;
+
+import org.junit.Test;
+
+import java.util.Arrays;
+
+/**
+ * Unit test for {@link CryptorImpV1}
+ */
+public final class CryptorImpV1Test {
+    private static final String TAG = "CryptorImpV1Test";
+    private static final byte[] SALT = new byte[] {102, 22};
+    private static final byte[] DATA =
+            new byte[] {107, -102, 101, 107, 20, 62, 2, 73, 113, 59, 8, -14, -58, 122};
+    private static final byte[] AUTHENTICITY_KEY =
+            new byte[] {-89, 88, -50, -42, -99, 57, 84, -24, 121, 1, -104, -8, -26, -73, -36, 100};
+
+    @Test
+    public void test_encryption() {
+        Cryptor v1Cryptor = CryptorImpV1.getInstance();
+        byte[] encryptedData = v1Cryptor.encrypt(DATA, SALT, AUTHENTICITY_KEY);
+
+        // for debugging
+        Log.d(TAG, "encrypted data is: " + Arrays.toString(encryptedData));
+
+        assertThat(encryptedData).isEqualTo(getEncryptedData());
+    }
+
+    @Test
+    public void test_encryption_invalidInput() {
+        Cryptor v1Cryptor = CryptorImpV1.getInstance();
+        assertThat(v1Cryptor.encrypt(DATA, SALT, new byte[]{1, 2, 3, 4, 6})).isNull();
+    }
+
+    @Test
+    public void test_decryption() {
+        Cryptor v1Cryptor = CryptorImpV1.getInstance();
+        byte[] decryptedData =
+                v1Cryptor.decrypt(getEncryptedData(), SALT, AUTHENTICITY_KEY);
+        // for debugging
+        Log.d(TAG, "decrypted data is: " + Arrays.toString(decryptedData));
+
+        assertThat(decryptedData).isEqualTo(DATA);
+    }
+
+    @Test
+    public void test_decryption_invalidInput() {
+        Cryptor v1Cryptor = CryptorImpV1.getInstance();
+        assertThat(v1Cryptor.decrypt(getEncryptedData(), SALT, new byte[]{1, 2, 3, 4, 6})).isNull();
+    }
+
+    @Test
+    public void generateSign() {
+        CryptorImpV1 v1Cryptor = CryptorImpV1.getInstance();
+        byte[] generatedTag = v1Cryptor.sign(DATA, AUTHENTICITY_KEY);
+        byte[] expectedTag = new byte[]{
+                100, 88, -104, 80, -66, 107, -38, 95, 34, 40, -56, -23, -90, 90, -87, 12};
+        assertThat(generatedTag).isEqualTo(expectedTag);
+    }
+
+    @Test
+    public void test_verify() {
+        CryptorImpV1 v1Cryptor = CryptorImpV1.getInstance();
+        byte[] expectedTag = new byte[]{
+                100, 88, -104, 80, -66, 107, -38, 95, 34, 40, -56, -23, -90, 90, -87, 12};
+
+        assertThat(v1Cryptor.verify(DATA, AUTHENTICITY_KEY, expectedTag)).isTrue();
+        assertThat(v1Cryptor.verify(DATA, AUTHENTICITY_KEY, DATA)).isFalse();
+    }
+
+    @Test
+    public void test_generateHmacTag_sameResult() {
+        CryptorImpV1 v1Cryptor = CryptorImpV1.getInstance();
+        byte[] res1 = v1Cryptor.generateHmacTag(DATA, AUTHENTICITY_KEY);
+        assertThat(res1)
+                .isEqualTo(v1Cryptor.generateHmacTag(DATA, AUTHENTICITY_KEY));
+    }
+
+    @Test
+    public void test_generateHmacTag_nullData() {
+        CryptorImpV1 v1Cryptor = CryptorImpV1.getInstance();
+        assertThat(v1Cryptor.generateHmacTag(/* data= */ null, AUTHENTICITY_KEY)).isNull();
+    }
+
+    @Test
+    public void test_generateHmacTag_nullKey() {
+        CryptorImpV1 v1Cryptor = CryptorImpV1.getInstance();
+        assertThat(v1Cryptor.generateHmacTag(DATA, /* authenticityKey= */ null)).isNull();
+    }
+
+    private static byte[] getEncryptedData() {
+        return new byte[]{-92, 94, -99, -97, 81, -48, -7, 119, -64, -22, 45, -49, -50, 92};
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/util/encryption/CryptorTest.java b/nearby/tests/unit/src/com/android/server/nearby/util/encryption/CryptorTest.java
new file mode 100644
index 0000000..ca612e3
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/util/encryption/CryptorTest.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.util.encryption;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import org.junit.Test;
+
+/**
+ * Unit test for {@link Cryptor}
+ */
+public final class CryptorTest {
+
+    private static final byte[] DATA =
+            new byte[] {107, -102, 101, 107, 20, 62, 2, 73, 113, 59, 8, -14, -58, 122};
+    private static final byte[] AUTHENTICITY_KEY =
+            new byte[] {-89, 88, -50, -42, -99, 57, 84, -24, 121, 1, -104, -8, -26, -73, -36, 100};
+
+    @Test
+    public void test_computeHkdf() {
+        int outputSize = 16;
+        byte[] res1 = Cryptor.computeHkdf(DATA, AUTHENTICITY_KEY, outputSize);
+        byte[] res2 = Cryptor.computeHkdf(DATA,
+                new byte[] {-89, 88, -50, -42, -99, 57, 84, -24, 121, 1, -104, -8, -26},
+                outputSize);
+
+        assertThat(res1).hasLength(outputSize);
+        assertThat(res2).hasLength(outputSize);
+        assertThat(res1).isNotEqualTo(res2);
+        assertThat(res1)
+                .isEqualTo(CryptorImpV1.computeHkdf(DATA, AUTHENTICITY_KEY, outputSize));
+    }
+
+    @Test
+    public void test_computeHkdf_invalidInput() {
+        assertThat(Cryptor.computeHkdf(DATA, AUTHENTICITY_KEY, /* size= */ 256000))
+                .isNull();
+        assertThat(Cryptor.computeHkdf(DATA, new byte[0], /* size= */ 255))
+                .isNull();
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/util/identity/CallerIdentityTest.java b/nearby/tests/unit/src/com/android/server/nearby/util/identity/CallerIdentityTest.java
new file mode 100644
index 0000000..c29cb92
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/util/identity/CallerIdentityTest.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.util.identity;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import org.junit.Test;
+
+public class CallerIdentityTest {
+    private static final int UID = 100;
+    private static final int PID = 10002;
+    private static final String PACKAGE_NAME = "package_name";
+    private static final String ATTRIBUTION_TAG = "attribution_tag";
+
+    @Test
+    public void testToString() {
+        CallerIdentity callerIdentity =
+                CallerIdentity.forTest(UID, PID, PACKAGE_NAME, ATTRIBUTION_TAG);
+        assertThat(callerIdentity.toString()).isEqualTo("100/package_name[attribution_tag]");
+        assertThat(callerIdentity.isSystemServer()).isFalse();
+    }
+
+    @Test
+    public void testHashCode() {
+        CallerIdentity callerIdentity =
+                CallerIdentity.forTest(UID, PID, PACKAGE_NAME, ATTRIBUTION_TAG);
+        CallerIdentity callerIdentity1 =
+                CallerIdentity.forTest(UID, PID, PACKAGE_NAME, ATTRIBUTION_TAG);
+        assertThat(callerIdentity.hashCode()).isEqualTo(callerIdentity1.hashCode());
+    }
+}
diff --git a/service/ServiceConnectivityResources/res/values-eu/strings.xml b/service/ServiceConnectivityResources/res/values-eu/strings.xml
index 9b39fd3..13f9eb4 100644
--- a/service/ServiceConnectivityResources/res/values-eu/strings.xml
+++ b/service/ServiceConnectivityResources/res/values-eu/strings.xml
@@ -36,7 +36,7 @@
     <item msgid="3004933964374161223">"datu-konexioa"</item>
     <item msgid="5624324321165953608">"Wifia"</item>
     <item msgid="5667906231066981731">"Bluetootha"</item>
-    <item msgid="346574747471703768">"Ethernet-a"</item>
+    <item msgid="346574747471703768">"Etherneta"</item>
     <item msgid="5734728378097476003">"VPNa"</item>
   </string-array>
     <string name="network_switch_type_name_unknown" msgid="5116448402191972082">"sare mota ezezaguna"</string>
diff --git a/tests/cts/hostside/Android.bp b/tests/cts/hostside/Android.bp
index 47ea53e..5474d08 100644
--- a/tests/cts/hostside/Android.bp
+++ b/tests/cts/hostside/Android.bp
@@ -37,7 +37,6 @@
     data: [
         ":CtsHostsideNetworkTestsApp",
         ":CtsHostsideNetworkTestsApp2",
-        ":CtsHostsideNetworkTestsAppNext",
     ],
     per_testcase_directory: true,
 }