diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/FastPairConstants.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/FastPairConstants.java
new file mode 100644
index 0000000..0ff1bf2
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/FastPairConstants.java
@@ -0,0 +1,77 @@
+/*
+ * Copyright 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.common.bluetooth.fastpair;
+
+import android.bluetooth.BluetoothDevice;
+
+/** Constants to share with other team. */
+public class FastPairConstants {
+    private static final String PACKAGE_NAME = "com.android.server.nearby";
+    private static final String PREFIX = PACKAGE_NAME + ".common.bluetooth.fastpair.";
+
+    /** MODEL_ID item name for extended intent field. */
+    public static final String EXTRA_MODEL_ID = PREFIX + "MODEL_ID";
+    /** CONNECTION_ID item name for extended intent field. */
+    public static final String EXTRA_CONNECTION_ID = PREFIX + "CONNECTION_ID";
+    /** BLUETOOTH_MAC_ADDRESS item name for extended intent field. */
+    public static final String EXTRA_BLUETOOTH_MAC_ADDRESS = PREFIX + "BLUETOOTH_MAC_ADDRESS";
+    /** COMPANION_SCAN_ITEM item name for extended intent field. */
+    public static final String EXTRA_SCAN_ITEM = PREFIX + "COMPANION_SCAN_ITEM";
+    /** BOND_RESULT item name for extended intent field. */
+    public static final String EXTRA_BOND_RESULT = PREFIX + "EXTRA_BOND_RESULT";
+
+    /**
+     * The bond result of the {@link BluetoothDevice} when FastPair launches the companion app, it
+     * means device is BONDED but the pairing process is not triggered by FastPair.
+     */
+    public static final int BOND_RESULT_SUCCESS_WITHOUT_FP = 0;
+
+    /**
+     * The bond result of the {@link BluetoothDevice} when FastPair launches the companion app, it
+     * means device is BONDED and the pairing process is triggered by FastPair.
+     */
+    public static final int BOND_RESULT_SUCCESS_WITH_FP = 1;
+
+    /**
+     * The bond result of the {@link BluetoothDevice} when FastPair launches the companion app, it
+     * means the pairing process triggered by FastPair is failed due to the lack of PIN code.
+     */
+    public static final int BOND_RESULT_FAIL_WITH_FP_WITHOUT_PIN = 2;
+
+    /**
+     * The bond result of the {@link BluetoothDevice} when FastPair launches the companion app, it
+     * means the pairing process triggered by FastPair is failed due to the PIN code is not
+     * confirmed by the user.
+     */
+    public static final int BOND_RESULT_FAIL_WITH_FP_WITH_PIN_NOT_CONFIRMED = 3;
+
+    /**
+     * The bond result of the {@link BluetoothDevice} when FastPair launches the companion app, it
+     * means the pairing process triggered by FastPair is failed due to the user thinks the PIN is
+     * wrong.
+     */
+    public static final int BOND_RESULT_FAIL_WITH_FP_WITH_PIN_WRONG = 4;
+
+    /**
+     * The bond result of the {@link BluetoothDevice} when FastPair launches the companion app, it
+     * means the pairing process triggered by FastPair is failed even after the user confirmed the
+     * PIN code is correct.
+     */
+    public static final int BOND_RESULT_FAIL_WITH_FP_WITH_PIN_CORRECT = 5;
+
+    private FastPairConstants() {}
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/SignalLostException.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/SignalLostException.java
new file mode 100644
index 0000000..244ee66
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/SignalLostException.java
@@ -0,0 +1,25 @@
+/*
+ * Copyright 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.common.bluetooth.fastpair;
+
+/** Base class for fast pair signal lost exceptions. */
+public class SignalLostException extends PairingException {
+    SignalLostException(String message, Exception e) {
+        super(message);
+        initCause(e);
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/TimeProvider.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/TimeProvider.java
new file mode 100644
index 0000000..a4de913
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/TimeProvider.java
@@ -0,0 +1,24 @@
+/*
+ * Copyright 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.common.bluetooth.testability;
+
+/** Provider of time for testability. */
+public class TimeProvider {
+    public long getTimeMillis() {
+        return System.currentTimeMillis();
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/VersionProvider.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/VersionProvider.java
new file mode 100644
index 0000000..f46ea7a
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/VersionProvider.java
@@ -0,0 +1,28 @@
+/*
+ * Copyright 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.common.bluetooth.testability;
+
+import android.os.Build.VERSION;
+
+/**
+ * Provider of android sdk version for testability
+ */
+public class VersionProvider {
+    public int getSdkInt() {
+        return VERSION.SDK_INT;
+    }
+}