Merge pull request #5907 from vector-im/feature/bma/currentTimeMillis

Use Clock interface

changelog.d/5907.sdk

@@ -0,0 +1 @@
+Replace usage of `System.currentTimeMillis()` by a `Clock` interface

matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/common/CommonTestHelper.kt

@@ -57,7 +57,8 @@ import java.util.concurrent.TimeUnit
 class CommonTestHelper(context: Context) {
 
     internal val matrix: TestMatrix
-    val coroutineScope = CoroutineScope(SupervisorJob() + Dispatchers.Main)
+    private val coroutineScope = CoroutineScope(SupervisorJob() + Dispatchers.Main)
+    private var accountNumber = 0
 
     fun getTestInterceptor(session: Session): MockOkHttpInterceptor? = TestModule.interceptorForSession(session.sessionId) as? MockOkHttpInterceptor
 
@@ -167,7 +168,8 @@ class CommonTestHelper(context: Context) {
                         if (rootThreadEventId != null) {
                             room.relationService().replyInThread(
                                     rootThreadEventId = rootThreadEventId,
-                                    replyInThreadText = formattedMessage)
+                                    replyInThreadText = formattedMessage
+                            )
                         } else {
                             room.sendService().sendTextMessage(formattedMessage)
                         }
@@ -237,7 +239,7 @@ class CommonTestHelper(context: Context) {
                               password: String,
                               testParams: SessionTestParams): Session {
         val session = createAccountAndSync(
-                userNamePrefix + "_" + System.currentTimeMillis() + UUID.randomUUID(),
+                userNamePrefix + "_" + accountNumber++ + "_" + UUID.randomUUID(),
                 password,
                 testParams
         )

matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/internal/crypto/AttachmentEncryptionTest.kt

@@ -29,8 +29,10 @@ import org.matrix.android.sdk.api.session.crypto.attachments.toElementToDecrypt
 import org.matrix.android.sdk.api.session.crypto.model.EncryptedFileInfo
 import org.matrix.android.sdk.api.session.crypto.model.EncryptedFileKey
 import org.matrix.android.sdk.internal.crypto.attachments.MXEncryptedAttachments
+import org.matrix.android.sdk.internal.util.time.DefaultClock
 import java.io.ByteArrayOutputStream
 import java.io.InputStream
+import java.util.UUID
 
 /**
  * Unit tests AttachmentEncryptionTest.
@@ -48,13 +50,18 @@ class AttachmentEncryptionTest {
         inputStream = if (inputAsByteArray.isEmpty()) {
             inputAsByteArray.inputStream()
         } else {
-            val memoryFile = MemoryFile("file" + System.currentTimeMillis(), inputAsByteArray.size)
+            val memoryFile = MemoryFile("file_" + UUID.randomUUID(), inputAsByteArray.size)
             memoryFile.outputStream.write(inputAsByteArray)
             memoryFile.inputStream
         }
 
         val decryptedStream = ByteArrayOutputStream()
-        val result = MXEncryptedAttachments.decryptAttachment(inputStream, encryptedFileInfo.toElementToDecrypt()!!, decryptedStream)
+        val result = MXEncryptedAttachments.decryptAttachment(
+                attachmentStream = inputStream,
+                elementToDecrypt = encryptedFileInfo.toElementToDecrypt()!!,
+                outputStream = decryptedStream,
+                clock = DefaultClock()
+        )
 
         assert(result)
 
@@ -117,9 +124,13 @@ class AttachmentEncryptionTest {
                 url = "dummyUrl"
         )
 
-        assertEquals("YWxwaGFudW1lcmljYWxseWFscGhhbnVtZXJpY2FsbHlhbHBoYW51bWVyaWNhbGx5YWxwaGFudW1lcmljYWxseQ",
+        assertEquals(
-                checkDecryption("zhtFStAeFx0s+9L/sSQO+WQMtldqYEHqTxMduJrCIpnkyer09kxJJuA4K+adQE4w+7jZe/vR9kIcqj9rOhDR8Q",
+                "YWxwaGFudW1lcmljYWxseWFscGhhbnVtZXJpY2FsbHlhbHBoYW51bWVyaWNhbGx5YWxwaGFudW1lcmljYWxseQ",
-                        encryptedFileInfo))
+                checkDecryption(
+                        "zhtFStAeFx0s+9L/sSQO+WQMtldqYEHqTxMduJrCIpnkyer09kxJJuA4K+adQE4w+7jZe/vR9kIcqj9rOhDR8Q",
+                        encryptedFileInfo
+                )
+        )
     }
 
     @Test
@@ -138,8 +149,12 @@ class AttachmentEncryptionTest {
                 url = "dummyUrl"
         )
 
-        assertNotEquals("YWxwaGFudW1lcmljYWxseWFscGhhbnVtZXJpY2FsbHlhbHBoYW51bWVyaWNhbGx5YWxwaGFudW1lcmljYWxseQ",
+        assertNotEquals(
-                checkDecryption("tJVNBVJ/vl36UQt4Y5e5m84bRUrQHhcdLPvS/7EkDvlkDLZXamBB6k8THbiawiKZ5Mnq9PZMSSbgOCvmnUBOMA",
+                "YWxwaGFudW1lcmljYWxseWFscGhhbnVtZXJpY2FsbHlhbHBoYW51bWVyaWNhbGx5YWxwaGFudW1lcmljYWxseQ",
-                        encryptedFileInfo))
+                checkDecryption(
+                        "tJVNBVJ/vl36UQt4Y5e5m84bRUrQHhcdLPvS/7EkDvlkDLZXamBB6k8THbiawiKZ5Mnq9PZMSSbgOCvmnUBOMA",
+                        encryptedFileInfo
+                )
+        )
     }
 }

matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/internal/crypto/CryptoStoreHelper.kt

@@ -22,6 +22,7 @@ import org.matrix.android.sdk.internal.crypto.store.db.RealmCryptoStore
 import org.matrix.android.sdk.internal.crypto.store.db.RealmCryptoStoreModule
 import org.matrix.android.sdk.internal.crypto.store.db.mapper.CrossSigningKeysMapper
 import org.matrix.android.sdk.internal.di.MoshiProvider
+import org.matrix.android.sdk.internal.util.time.DefaultClock
 import kotlin.random.Random
 
 internal class CryptoStoreHelper {
@@ -34,7 +35,8 @@ internal class CryptoStoreHelper {
                         .build(),
                 crossSigningKeysMapper = CrossSigningKeysMapper(MoshiProvider.providesMoshi()),
                 userId = "userId_" + Random.nextInt(),
-                deviceId = "deviceId_sample"
+                deviceId = "deviceId_sample",
+                clock = DefaultClock(),
         )
     }
 }

matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/internal/crypto/CryptoStoreTest.kt

@@ -27,6 +27,7 @@ import org.junit.runner.RunWith
 import org.matrix.android.sdk.InstrumentedTest
 import org.matrix.android.sdk.internal.crypto.model.OlmSessionWrapper
 import org.matrix.android.sdk.internal.crypto.store.IMXCryptoStore
+import org.matrix.android.sdk.internal.util.time.DefaultClock
 import org.matrix.olm.OlmAccount
 import org.matrix.olm.OlmManager
 import org.matrix.olm.OlmSession
@@ -37,6 +38,7 @@ private const val DUMMY_DEVICE_KEY = "DeviceKey"
 class CryptoStoreTest : InstrumentedTest {
 
     private val cryptoStoreHelper = CryptoStoreHelper()
+    private val clock = DefaultClock()
 
     @Before
     fun setup() {
@@ -106,7 +108,7 @@ class CryptoStoreTest : InstrumentedTest {
 
         // Note: we cannot be sure what will be the result of getLastUsedSessionId() here
 
-        olmSessionWrapper2.onMessageReceived()
+        olmSessionWrapper2.onMessageReceived(clock.epochMillis())
         cryptoStore.storeSession(olmSessionWrapper2, DUMMY_DEVICE_KEY)
 
         // sessionId2 is returned now
@@ -114,7 +116,7 @@ class CryptoStoreTest : InstrumentedTest {
 
         Thread.sleep(2)
 
-        olmSessionWrapper1.onMessageReceived()
+        olmSessionWrapper1.onMessageReceived(clock.epochMillis())
         cryptoStore.storeSession(olmSessionWrapper1, DUMMY_DEVICE_KEY)
 
         // sessionId1 is returned now

matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/session/room/timeline/ChunkEntityTest.kt

@@ -35,6 +35,7 @@ import org.matrix.android.sdk.internal.database.mapper.toEntity
 import org.matrix.android.sdk.internal.database.model.ChunkEntity
 import org.matrix.android.sdk.internal.database.model.SessionRealmModule
 import org.matrix.android.sdk.internal.session.room.timeline.PaginationDirection
+import org.matrix.android.sdk.internal.util.time.DefaultClock
 import org.matrix.android.sdk.session.room.timeline.RoomDataHelper.createFakeListOfEvents
 import org.matrix.android.sdk.session.room.timeline.RoomDataHelper.createFakeMessageEvent
 
@@ -42,6 +43,7 @@ import org.matrix.android.sdk.session.room.timeline.RoomDataHelper.createFakeMes
 internal class ChunkEntityTest : InstrumentedTest {
 
     private lateinit var monarchy: Monarchy
+    private val clock = DefaultClock()
 
     @Before
     fun setup() {
@@ -59,7 +61,7 @@ internal class ChunkEntityTest : InstrumentedTest {
         monarchy.runTransactionSync { realm ->
             val chunk: ChunkEntity = realm.createObject()
 
-            val fakeEvent = createFakeMessageEvent().toEntity(ROOM_ID, SendState.SYNCED, System.currentTimeMillis()).let {
+            val fakeEvent = createFakeMessageEvent().toEntity(ROOM_ID, SendState.SYNCED, clock.epochMillis()).let {
                 realm.copyToRealm(it)
             }
             chunk.addTimelineEvent(
@@ -75,7 +77,7 @@ internal class ChunkEntityTest : InstrumentedTest {
     fun add_shouldNotAdd_whenAlreadyIncluded() {
         monarchy.runTransactionSync { realm ->
             val chunk: ChunkEntity = realm.createObject()
-            val fakeEvent = createFakeMessageEvent().toEntity(ROOM_ID, SendState.SYNCED, System.currentTimeMillis()).let {
+            val fakeEvent = createFakeMessageEvent().toEntity(ROOM_ID, SendState.SYNCED, clock.epochMillis()).let {
                 realm.copyToRealm(it)
             }
             chunk.addTimelineEvent(
@@ -153,7 +155,7 @@ internal class ChunkEntityTest : InstrumentedTest {
                                    events: List<Event>,
                                    direction: PaginationDirection) {
         events.forEach { event ->
-            val fakeEvent = event.toEntity(roomId, SendState.SYNCED, System.currentTimeMillis()).let {
+            val fakeEvent = event.toEntity(roomId, SendState.SYNCED, clock.epochMillis()).let {
                 realm.copyToRealm(it)
             }
             addTimelineEvent(

matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/session/room/timeline/FakeGetContextOfEventTask.kt

@@ -26,8 +26,8 @@ internal class FakeGetContextOfEventTask constructor(private val tokenChunkEvent
     override suspend fun execute(params: GetContextOfEventTask.Params): TokenChunkEventPersistor.Result {
         val fakeEvents = RoomDataHelper.createFakeListOfEvents(30)
         val tokenChunkEvent = FakeTokenChunkEvent(
-                Random.nextLong(System.currentTimeMillis()).toString(),
+                Random.nextLong().toString(),
-                Random.nextLong(System.currentTimeMillis()).toString(),
+                Random.nextLong().toString(),
                 fakeEvents
         )
         return tokenChunkEventPersistor.insertInDb(tokenChunkEvent, params.roomId, PaginationDirection.BACKWARDS)

matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/session/room/timeline/FakePaginationTask.kt

@@ -25,7 +25,7 @@ internal class FakePaginationTask @Inject constructor(private val tokenChunkEven
 
     override suspend fun execute(params: PaginationTask.Params): TokenChunkEventPersistor.Result {
         val fakeEvents = RoomDataHelper.createFakeListOfEvents(30)
-        val tokenChunkEvent = FakeTokenChunkEvent(params.from, Random.nextLong(System.currentTimeMillis()).toString(), fakeEvents)
+        val tokenChunkEvent = FakeTokenChunkEvent(params.from, Random.nextLong().toString(), fakeEvents)
         return tokenChunkEventPersistor.insertInDb(tokenChunkEvent, params.roomId, params.direction)
     }
 }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/crypto/model/IncomingRequestCancellation.kt

@@ -46,8 +46,9 @@ data class IncomingRequestCancellation(
          * Factory
          *
          * @param event the event
+         * @param currentTimeMillis the current time in milliseconds
          */
-        fun fromEvent(event: Event): IncomingRequestCancellation? {
+        fun fromEvent(event: Event, currentTimeMillis: Long): IncomingRequestCancellation? {
             return event.getClearContent()
                     .toModel<ShareRequestCancellation>()
                     ?.let {
@@ -55,7 +56,7 @@ data class IncomingRequestCancellation(
                                 userId = event.senderId,
                                 deviceId = it.requestingDeviceId,
                                 requestId = it.requestId,
-                                localCreationTimestamp = event.ageLocalTs ?: System.currentTimeMillis()
+                                localCreationTimestamp = event.ageLocalTs ?: currentTimeMillis
                         )
                     }
         }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/crypto/model/IncomingRoomKeyRequest.kt

@@ -64,8 +64,9 @@ data class IncomingRoomKeyRequest(
          * Factory
          *
          * @param event the event
+         * @param currentTimeMillis the current time in milliseconds
          */
-        fun fromEvent(event: Event): IncomingRoomKeyRequest? {
+        fun fromEvent(event: Event, currentTimeMillis: Long): IncomingRoomKeyRequest? {
             return event.getClearContent()
                     .toModel<RoomKeyShareRequest>()
                     ?.let {
@@ -74,7 +75,7 @@ data class IncomingRoomKeyRequest(
                                 deviceId = it.requestingDeviceId,
                                 requestId = it.requestId,
                                 requestBody = it.body ?: RoomKeyRequestBody(),
-                                localCreationTimestamp = event.ageLocalTs ?: System.currentTimeMillis()
+                                localCreationTimestamp = event.ageLocalTs ?: currentTimeMillis
                         )
                     }
         }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/crypto/model/IncomingSecretShareRequest.kt

@@ -64,8 +64,9 @@ data class IncomingSecretShareRequest(
          * Factory
          *
          * @param event the event
+         * @param currentTimeMillis the current time in milliseconds
          */
-        fun fromEvent(event: Event): IncomingSecretShareRequest? {
+        fun fromEvent(event: Event, currentTimeMillis: Long): IncomingSecretShareRequest? {
             return event.getClearContent()
                     .toModel<SecretShareRequest>()
                     ?.let {
@@ -74,7 +75,7 @@ data class IncomingSecretShareRequest(
                                 deviceId = it.requestingDeviceId,
                                 requestId = it.requestId,
                                 secretName = it.secretName,
-                                localCreationTimestamp = event.ageLocalTs ?: System.currentTimeMillis()
+                                localCreationTimestamp = event.ageLocalTs ?: currentTimeMillis
                         )
                     }
         }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/crypto/verification/VerificationService.kt

@@ -129,11 +129,10 @@ interface VerificationService {
         private const val TEN_MINUTES_IN_MILLIS = 10 * 60 * 1000
         private const val FIVE_MINUTES_IN_MILLIS = 5 * 60 * 1000
 
-        fun isValidRequest(age: Long?): Boolean {
+        fun isValidRequest(age: Long?, currentTimeMillis: Long): Boolean {
             if (age == null) return false
-            val now = System.currentTimeMillis()
+            val tooInThePast = currentTimeMillis - TEN_MINUTES_IN_MILLIS
-            val tooInThePast = now - TEN_MINUTES_IN_MILLIS
+            val tooInTheFuture = currentTimeMillis + FIVE_MINUTES_IN_MILLIS
-            val tooInTheFuture = now + FIVE_MINUTES_IN_MILLIS
             return age in tooInThePast..tooInTheFuture
         }
     }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/CancelGossipRequestWorker.kt

@@ -32,6 +32,7 @@ import org.matrix.android.sdk.internal.crypto.store.IMXCryptoStore
 import org.matrix.android.sdk.internal.crypto.tasks.SendToDeviceTask
 import org.matrix.android.sdk.internal.crypto.tasks.createUniqueTxnId
 import org.matrix.android.sdk.internal.session.SessionComponent
+import org.matrix.android.sdk.internal.util.time.Clock
 import org.matrix.android.sdk.internal.worker.SessionSafeCoroutineWorker
 import org.matrix.android.sdk.internal.worker.SessionWorkerParams
 import javax.inject.Inject
@@ -65,6 +66,7 @@ internal class CancelGossipRequestWorker(context: Context, params: WorkerParamet
     @Inject lateinit var sendToDeviceTask: SendToDeviceTask
     @Inject lateinit var cryptoStore: IMXCryptoStore
     @Inject lateinit var credentials: Credentials
+    @Inject lateinit var clock: Clock
 
     override fun injectWith(injector: SessionComponent) {
         injector.inject(this)
@@ -85,7 +87,7 @@ internal class CancelGossipRequestWorker(context: Context, params: WorkerParamet
                 content = toDeviceContent.toContent(),
                 senderId = credentials.userId
         ).also {
-            it.ageLocalTs = System.currentTimeMillis()
+            it.ageLocalTs = clock.epochMillis()
         })
 
         params.recipients.forEach { userToDeviceMap ->

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/DefaultCryptoService.kt

@@ -103,6 +103,7 @@ import org.matrix.android.sdk.internal.task.TaskThread
 import org.matrix.android.sdk.internal.task.configureWith
 import org.matrix.android.sdk.internal.task.launchToCallback
 import org.matrix.android.sdk.internal.util.JsonCanonicalizer
+import org.matrix.android.sdk.internal.util.time.Clock
 import org.matrix.olm.OlmManager
 import timber.log.Timber
 import java.util.concurrent.atomic.AtomicBoolean
@@ -130,6 +131,7 @@ internal class DefaultCryptoService @Inject constructor(
         private val userId: String,
         @DeviceId
         private val deviceId: String?,
+        private val clock: Clock,
         private val myDeviceInfoHolder: Lazy<MyDeviceInfoHolder>,
         // the crypto store
         private val cryptoStore: IMXCryptoStore,
@@ -701,11 +703,11 @@ internal class DefaultCryptoService @Inject constructor(
             }
             val safeAlgorithm = alg
             if (safeAlgorithm != null) {
-                val t0 = System.currentTimeMillis()
+                val t0 = clock.epochMillis()
                 Timber.tag(loggerTag.value).v("encryptEventContent() starts")
                 runCatching {
                     val content = safeAlgorithm.encryptEventContent(eventContent, eventType, userIds)
-                    Timber.tag(loggerTag.value).v("## CRYPTO | encryptEventContent() : succeeds after ${System.currentTimeMillis() - t0} ms")
+                    Timber.tag(loggerTag.value).v("## CRYPTO | encryptEventContent() : succeeds after ${clock.epochMillis() - t0} ms")
                     MXEncryptEventContentResult(content, EventType.ENCRYPTED)
                 }.foldToCallback(callback)
             } else {
@@ -1022,9 +1024,9 @@ internal class DefaultCryptoService @Inject constructor(
         return withContext(coroutineDispatchers.crypto) {
             Timber.tag(loggerTag.value).v("importRoomKeys starts")
 
-            val t0 = System.currentTimeMillis()
+            val t0 = clock.epochMillis()
             val roomKeys = MXMegolmExportEncryption.decryptMegolmKeyFile(roomKeysAsArray, password)
-            val t1 = System.currentTimeMillis()
+            val t1 = clock.epochMillis()
 
             Timber.tag(loggerTag.value).v("importRoomKeys : decryptMegolmKeyFile done in ${t1 - t0} ms")
 
@@ -1032,7 +1034,7 @@ internal class DefaultCryptoService @Inject constructor(
                     .adapter<List<MegolmSessionData>>(Types.newParameterizedType(List::class.java, MegolmSessionData::class.java))
                     .fromJson(roomKeys)
 
-            val t2 = System.currentTimeMillis()
+            val t2 = clock.epochMillis()
 
             Timber.tag(loggerTag.value).v("importRoomKeys : JSON parsing ${t2 - t1} ms")
 
@@ -1224,7 +1226,7 @@ internal class DefaultCryptoService @Inject constructor(
 //        val deviceKey = deviceInfo.identityKey()
 //
 //        val lastForcedDate = lastNewSessionForcedDates.getObject(senderId, deviceKey) ?: 0
-//        val now = System.currentTimeMillis()
+//        val now = clock.epochMillis()
 //        if (now - lastForcedDate < CRYPTO_MIN_FORCE_SESSION_PERIOD_MILLIS) {
 //            Timber.d("## CRYPTO | markOlmSessionForUnwedging: New session already forced with device at $lastForcedDate. Not forcing another")
 //            return

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/DeviceListManager.kt

@@ -31,19 +31,23 @@ import org.matrix.android.sdk.internal.session.SessionScope
 import org.matrix.android.sdk.internal.session.sync.SyncTokenStore
 import org.matrix.android.sdk.internal.task.TaskExecutor
 import org.matrix.android.sdk.internal.util.logLimit
+import org.matrix.android.sdk.internal.util.time.Clock
 import timber.log.Timber
 import javax.inject.Inject
 
 // Legacy name: MXDeviceList
 @SessionScope
-internal class DeviceListManager @Inject constructor(private val cryptoStore: IMXCryptoStore,
+internal class DeviceListManager @Inject constructor(
+        private val cryptoStore: IMXCryptoStore,
         private val olmDevice: MXOlmDevice,
         private val syncTokenStore: SyncTokenStore,
         private val credentials: Credentials,
         private val downloadKeysForUsersTask: DownloadKeysForUsersTask,
         private val cryptoSessionInfoProvider: CryptoSessionInfoProvider,
         coroutineDispatchers: MatrixCoroutineDispatchers,
-                                                     private val taskExecutor: TaskExecutor) {
+        private val taskExecutor: TaskExecutor,
+        private val clock: Clock,
+) {
 
     interface UserDevicesUpdateListener {
         fun onUsersDeviceUpdate(userIds: List<String>)
@@ -310,9 +314,9 @@ internal class DeviceListManager @Inject constructor(private val cryptoStore: IM
             stored
         } else {
             Timber.v("## CRYPTO | downloadKeys() : starts")
-            val t0 = System.currentTimeMillis()
+            val t0 = clock.epochMillis()
             val result = doKeyDownloadForUsers(downloadUsers)
-            Timber.v("## CRYPTO | downloadKeys() : doKeyDownloadForUsers succeeds after ${System.currentTimeMillis() - t0} ms")
+            Timber.v("## CRYPTO | downloadKeys() : doKeyDownloadForUsers succeeds after ${clock.epochMillis() - t0} ms")
             result.also {
                 it.addEntriesFromMap(stored)
             }
@@ -475,8 +479,10 @@ internal class DeviceListManager @Inject constructor(private val cryptoStore: IM
         }
 
         if (!isVerified) {
-            Timber.e("## CRYPTO | validateDeviceKeys() : Unable to verify signature on device " + userId + ":" +
+            Timber.e(
-                    deviceKeys.deviceId + " with error " + errorMessage)
+                    "## CRYPTO | validateDeviceKeys() : Unable to verify signature on device " + userId + ":" +
+                            deviceKeys.deviceId + " with error " + errorMessage
+            )
             return false
         }
 
@@ -486,9 +492,11 @@ internal class DeviceListManager @Inject constructor(private val cryptoStore: IM
                 // best off sticking with the original keys.
                 //
                 // Should we warn the user about it somehow?
-                Timber.e("## CRYPTO | validateDeviceKeys() : WARNING:Ed25519 key for device " + userId + ":" +
+                Timber.e(
+                        "## CRYPTO | validateDeviceKeys() : WARNING:Ed25519 key for device " + userId + ":" +
                                 deviceKeys.deviceId + " has changed : " +
-                        previouslyStoredDeviceKeys.fingerprint() + " -> " + signKey)
+                                previouslyStoredDeviceKeys.fingerprint() + " -> " + signKey
+                )
 
                 Timber.e("## CRYPTO | validateDeviceKeys() : $previouslyStoredDeviceKeys -> $deviceKeys")
                 Timber.e("## CRYPTO | validateDeviceKeys() : ${previouslyStoredDeviceKeys.keys} -> ${deviceKeys.keys}")

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/EventDecryptor.kt

@@ -36,6 +36,7 @@ import org.matrix.android.sdk.internal.crypto.store.IMXCryptoStore
 import org.matrix.android.sdk.internal.crypto.tasks.SendToDeviceTask
 import org.matrix.android.sdk.internal.extensions.foldToCallback
 import org.matrix.android.sdk.internal.session.SessionScope
+import org.matrix.android.sdk.internal.util.time.Clock
 import timber.log.Timber
 import javax.inject.Inject
 
@@ -47,6 +48,7 @@ private val loggerTag = LoggerTag("CryptoSyncHandler", LoggerTag.CRYPTO)
 internal class EventDecryptor @Inject constructor(
         private val cryptoCoroutineScope: CoroutineScope,
         private val coroutineDispatchers: MatrixCoroutineDispatchers,
+        private val clock: Clock,
         private val roomDecryptorProvider: RoomDecryptorProvider,
         private val messageEncrypter: MessageEncrypter,
         private val sendToDeviceTask: SendToDeviceTask,
@@ -153,7 +155,7 @@ internal class EventDecryptor @Inject constructor(
         // we should force start a new session for those
         Timber.tag(loggerTag.value).v("Unwedging:  ${wedgedDevices.size} are wedged")
         // get the one that should be retried according to rate limit
-        val now = System.currentTimeMillis()
+        val now = clock.epochMillis()
         val toUnwedge = wedgedDevices.filter {
             val lastForcedDate = lastNewSessionForcedDates[it] ?: 0
             if (now - lastForcedDate < DefaultCryptoService.CRYPTO_MIN_FORCE_SESSION_PERIOD_MILLIS) {

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/GossipingWorkManager.kt

@@ -26,6 +26,7 @@ import org.matrix.android.sdk.internal.di.WorkManagerProvider
 import org.matrix.android.sdk.internal.session.SessionScope
 import org.matrix.android.sdk.internal.util.CancelableWork
 import org.matrix.android.sdk.internal.worker.startChain
+import java.util.UUID
 import java.util.concurrent.TimeUnit
 import javax.inject.Inject
 
@@ -44,8 +45,8 @@ internal class GossipingWorkManager @Inject constructor(
     }
 
     // Prevent sending queue to stay broken after app restart
-    // The unique queue id will stay the same as long as this object is instanciated
+    // The unique queue id will stay the same as long as this object is instantiated
-    val queueSuffixApp = System.currentTimeMillis()
+    private val queueSuffixApp = UUID.randomUUID()
 
     fun postWork(workRequest: OneTimeWorkRequest, policy: ExistingWorkPolicy = ExistingWorkPolicy.APPEND): Cancelable {
         workManagerProvider.workManager

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/IncomingGossipingRequestManager.kt

@@ -44,6 +44,7 @@ import org.matrix.android.sdk.internal.crypto.store.IMXCryptoStore
 import org.matrix.android.sdk.internal.crypto.tasks.createUniqueTxnId
 import org.matrix.android.sdk.internal.di.SessionId
 import org.matrix.android.sdk.internal.session.SessionScope
+import org.matrix.android.sdk.internal.util.time.Clock
 import org.matrix.android.sdk.internal.worker.WorkerParamsFactory
 import timber.log.Timber
 import java.util.concurrent.Executors
@@ -59,7 +60,9 @@ internal class IncomingGossipingRequestManager @Inject constructor(
         private val roomEncryptorsStore: RoomEncryptorsStore,
         private val roomDecryptorProvider: RoomDecryptorProvider,
         private val coroutineDispatchers: MatrixCoroutineDispatchers,
-        private val cryptoCoroutineScope: CoroutineScope) {
+        private val cryptoCoroutineScope: CoroutineScope,
+        private val clock: Clock,
+) {
 
     private val executor = Executors.newSingleThreadExecutor()
 
@@ -89,7 +92,7 @@ internal class IncomingGossipingRequestManager @Inject constructor(
     fun onVerificationCompleteForDevice(deviceId: String) {
         // For now we just keep an in memory cache
         synchronized(recentlyVerifiedDevices) {
-            recentlyVerifiedDevices[deviceId] = System.currentTimeMillis()
+            recentlyVerifiedDevices[deviceId] = clock.epochMillis()
         }
     }
 
@@ -100,7 +103,7 @@ internal class IncomingGossipingRequestManager @Inject constructor(
         }
         if (verifTimestamp == null) return false
 
-        val age = System.currentTimeMillis() - verifTimestamp
+        val age = clock.epochMillis() - verifTimestamp
 
         return age < FIVE_MINUTES_IN_MILLIS
     }
@@ -114,11 +117,11 @@ internal class IncomingGossipingRequestManager @Inject constructor(
     fun onGossipingRequestEvent(event: Event) {
         val roomKeyShare = event.getClearContent().toModel<GossipingDefaultContent>()
         Timber.i("## CRYPTO | GOSSIP onGossipingRequestEvent received type ${event.type} from user:${event.senderId}, content:$roomKeyShare")
-        // val ageLocalTs = event.unsignedData?.age?.let { System.currentTimeMillis() - it }
+        // val ageLocalTs = event.unsignedData?.age?.let { clock.epochMillis() - it }
         when (roomKeyShare?.action) {
             GossipingToDeviceObject.ACTION_SHARE_REQUEST      -> {
                 if (event.getClearType() == EventType.REQUEST_SECRET) {
-                    IncomingSecretShareRequest.fromEvent(event)?.let {
+                    IncomingSecretShareRequest.fromEvent(event, clock.epochMillis())?.let {
                         if (event.senderId == credentials.userId && it.deviceId == credentials.deviceId) {
                             // ignore, it was sent by me as *
                             Timber.v("## GOSSIP onGossipingRequestEvent type ${event.type} ignore remote echo")
@@ -129,7 +132,7 @@ internal class IncomingGossipingRequestManager @Inject constructor(
                         }
                     }
                 } else if (event.getClearType() == EventType.ROOM_KEY_REQUEST) {
-                    IncomingRoomKeyRequest.fromEvent(event)?.let {
+                    IncomingRoomKeyRequest.fromEvent(event, clock.epochMillis())?.let {
                         if (event.senderId == credentials.userId && it.deviceId == credentials.deviceId) {
                             // ignore, it was sent by me as *
                             Timber.v("## GOSSIP onGossipingRequestEvent type ${event.type} ignore remote echo")
@@ -141,7 +144,7 @@ internal class IncomingGossipingRequestManager @Inject constructor(
                 }
             }
             GossipingToDeviceObject.ACTION_SHARE_CANCELLATION -> {
-                IncomingRequestCancellation.fromEvent(event)?.let {
+                IncomingRequestCancellation.fromEvent(event, clock.epochMillis())?.let {
                     receivedRequestCancellations.add(it)
                 }
             }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/MXMegolmExportEncryption.kt

@@ -29,6 +29,7 @@ import javax.crypto.spec.SecretKeySpec
 import kotlin.experimental.and
 import kotlin.experimental.xor
 import kotlin.math.min
+import kotlin.system.measureTimeMillis
 
 /**
  * Utility class to import/export the crypto data
@@ -310,8 +311,8 @@ internal object MXMegolmExportEncryption {
      */
     @Throws(Exception::class)
     private fun deriveKeys(salt: ByteArray, iterations: Int, password: String): ByteArray {
-        val t0 = System.currentTimeMillis()
+        val key = ByteArray(64)
-
+        measureTimeMillis {
             // based on https://en.wikipedia.org/wiki/PBKDF2 algorithm
             // it is simpler than the generic algorithm because the expected key length is equal to the mac key length.
             // noticed as dklen/hlen
@@ -319,7 +320,6 @@ internal object MXMegolmExportEncryption {
             prf.init(SecretKeySpec(password.toByteArray(Charsets.UTF_8), "HmacSHA512"))
 
             // 512 bits key length
-        val key = ByteArray(64)
             val uc = ByteArray(64)
 
             // U1 = PRF(Password, Salt || INT_32_BE(i))
@@ -342,8 +342,9 @@ internal object MXMegolmExportEncryption {
                     key[byteIndex] = key[byteIndex] xor uc[byteIndex]
                 }
             }
-
+        }.also {
-        Timber.v("## deriveKeys() : $iterations in ${System.currentTimeMillis() - t0} ms")
+            Timber.v("## deriveKeys() : $iterations in $it ms")
+        }
 
         return key
     }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/MXOlmDevice.kt

@@ -35,6 +35,7 @@ import org.matrix.android.sdk.internal.session.SessionScope
 import org.matrix.android.sdk.internal.util.JsonCanonicalizer
 import org.matrix.android.sdk.internal.util.convertFromUTF8
 import org.matrix.android.sdk.internal.util.convertToUTF8
+import org.matrix.android.sdk.internal.util.time.Clock
 import org.matrix.olm.OlmAccount
 import org.matrix.olm.OlmException
 import org.matrix.olm.OlmMessage
@@ -55,7 +56,8 @@ internal class MXOlmDevice @Inject constructor(
          */
         private val store: IMXCryptoStore,
         private val olmSessionStore: OlmSessionStore,
-        private val inboundGroupSessionStore: InboundGroupSessionStore
+        private val inboundGroupSessionStore: InboundGroupSessionStore,
+        private val clock: Clock,
 ) {
 
     val mutex = Mutex()
@@ -277,7 +279,7 @@ internal class MXOlmDevice @Inject constructor(
             // Pretend we've received a message at this point, otherwise
             // if we try to send a message to the device, it won't use
             // this session
-            olmSessionWrapper.onMessageReceived()
+            olmSessionWrapper.onMessageReceived(clock.epochMillis())
 
             olmSessionStore.storeSession(olmSessionWrapper, theirIdentityKey)
 
@@ -348,7 +350,7 @@ internal class MXOlmDevice @Inject constructor(
 
                 val olmSessionWrapper = OlmSessionWrapper(olmSession, 0)
                 // This counts as a received message: set last received message time to now
-                olmSessionWrapper.onMessageReceived()
+                olmSessionWrapper.onMessageReceived(clock.epochMillis())
 
                 olmSessionStore.storeSession(olmSessionWrapper, theirDeviceIdentityKey)
             } catch (e: Exception) {
@@ -454,7 +456,7 @@ internal class MXOlmDevice @Inject constructor(
             payloadString =
                     olmSessionWrapper.mutex.withLock {
                         olmSessionWrapper.olmSession.decryptMessage(olmMessage).also {
-                            olmSessionWrapper.onMessageReceived()
+                            olmSessionWrapper.onMessageReceived(clock.epochMillis())
                         }
                     }
             olmSessionStore.storeSession(olmSessionWrapper, theirDeviceIdentityKey)
@@ -520,6 +522,7 @@ internal class MXOlmDevice @Inject constructor(
             return MXOutboundSessionInfo(
                     sessionId = sessionId,
                     sharedWithHelper = SharedWithHelper(roomId, sessionId, store),
+                    clock,
                     restoredOutboundGroupSession.creationTime
             )
         }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/OneTimeKeysUploader.kt

@@ -23,6 +23,7 @@ import org.matrix.android.sdk.internal.crypto.model.rest.KeysUploadResponse
 import org.matrix.android.sdk.internal.crypto.tasks.UploadKeysTask
 import org.matrix.android.sdk.internal.session.SessionScope
 import org.matrix.android.sdk.internal.util.JsonCanonicalizer
+import org.matrix.android.sdk.internal.util.time.Clock
 import org.matrix.olm.OlmAccount
 import timber.log.Timber
 import javax.inject.Inject
@@ -38,6 +39,7 @@ internal class OneTimeKeysUploader @Inject constructor(
         private val olmDevice: MXOlmDevice,
         private val objectSigner: ObjectSigner,
         private val uploadKeysTask: UploadKeysTask,
+        private val clock: Clock,
         context: Context
 ) {
     // tell if there is a OTK check in progress
@@ -77,7 +79,7 @@ internal class OneTimeKeysUploader @Inject constructor(
             Timber.v("maybeUploadOneTimeKeys: already in progress")
             return
         }
-        if (System.currentTimeMillis() - lastOneTimeKeyCheck < ONE_TIME_KEY_UPLOAD_PERIOD) {
+        if (clock.epochMillis() - lastOneTimeKeyCheck < ONE_TIME_KEY_UPLOAD_PERIOD) {
             // we've done a key upload recently.
             Timber.v("maybeUploadOneTimeKeys: executed too recently")
             return
@@ -94,7 +96,7 @@ internal class OneTimeKeysUploader @Inject constructor(
 
         Timber.d("maybeUploadOneTimeKeys: otk count $oneTimeKeyCountFromSync , unpublished fallback key ${olmDevice.hasUnpublishedFallbackKey()}")
 
-        lastOneTimeKeyCheck = System.currentTimeMillis()
+        lastOneTimeKeyCheck = clock.epochMillis()
 
         // We then check how many keys we can store in the Account object.
         val maxOneTimeKeys = olmDevice.getMaxNumberOfOneTimeKeys()
@@ -126,7 +128,7 @@ internal class OneTimeKeysUploader @Inject constructor(
 
         // Check if we need to forget a fallback key
         val latestPublishedTime = getLastFallbackKeyPublishTime()
-        if (latestPublishedTime != 0L && System.currentTimeMillis() - latestPublishedTime > FALLBACK_KEY_FORGET_DELAY) {
+        if (latestPublishedTime != 0L && clock.epochMillis() - latestPublishedTime > FALLBACK_KEY_FORGET_DELAY) {
             // This should be called once you are reasonably certain that you will not receive any more messages
             // that use the old fallback key
             Timber.d("## forgetFallbackKey()")
@@ -168,7 +170,7 @@ internal class OneTimeKeysUploader @Inject constructor(
         olmDevice.markKeysAsPublished()
         if (hadUnpublishedFallbackKey) {
             // It had an unpublished fallback key that was published just now
-            saveLastFallbackKeyPublishTime(System.currentTimeMillis())
+            saveLastFallbackKeyPublishTime(clock.epochMillis())
         }
 
         if (response.hasOneTimeKeyCountsForAlgorithm(MXKey.KEY_SIGNED_CURVE_25519_TYPE)) {

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/SendGossipRequestWorker.kt

@@ -35,6 +35,7 @@ import org.matrix.android.sdk.internal.crypto.store.IMXCryptoStore
 import org.matrix.android.sdk.internal.crypto.tasks.SendToDeviceTask
 import org.matrix.android.sdk.internal.crypto.tasks.createUniqueTxnId
 import org.matrix.android.sdk.internal.session.SessionComponent
+import org.matrix.android.sdk.internal.util.time.Clock
 import org.matrix.android.sdk.internal.worker.SessionSafeCoroutineWorker
 import org.matrix.android.sdk.internal.worker.SessionWorkerParams
 import timber.log.Timber
@@ -57,6 +58,7 @@ internal class SendGossipRequestWorker(context: Context, params: WorkerParameter
     @Inject lateinit var sendToDeviceTask: SendToDeviceTask
     @Inject lateinit var cryptoStore: IMXCryptoStore
     @Inject lateinit var credentials: Credentials
+    @Inject lateinit var clock: Clock
 
     override fun injectWith(injector: SessionComponent) {
         injector.inject(this)
@@ -85,7 +87,7 @@ internal class SendGossipRequestWorker(context: Context, params: WorkerParameter
                         content = toDeviceContent.toContent(),
                         senderId = credentials.userId
                 ).also {
-                    it.ageLocalTs = System.currentTimeMillis()
+                    it.ageLocalTs = clock.epochMillis()
                 })
 
                 params.keyShareRequest.recipients.forEach { userToDeviceMap ->
@@ -109,7 +111,7 @@ internal class SendGossipRequestWorker(context: Context, params: WorkerParameter
                         content = toDeviceContent.toContent(),
                         senderId = credentials.userId
                 ).also {
-                    it.ageLocalTs = System.currentTimeMillis()
+                    it.ageLocalTs = clock.epochMillis()
                 })
 
                 params.secretShareRequest.recipients.forEach { userToDeviceMap ->

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/SendGossipWorker.kt

@@ -34,6 +34,7 @@ import org.matrix.android.sdk.internal.crypto.store.IMXCryptoStore
 import org.matrix.android.sdk.internal.crypto.tasks.SendToDeviceTask
 import org.matrix.android.sdk.internal.crypto.tasks.createUniqueTxnId
 import org.matrix.android.sdk.internal.session.SessionComponent
+import org.matrix.android.sdk.internal.util.time.Clock
 import org.matrix.android.sdk.internal.worker.SessionSafeCoroutineWorker
 import org.matrix.android.sdk.internal.worker.SessionWorkerParams
 import timber.log.Timber
@@ -63,6 +64,7 @@ internal class SendGossipWorker(
     @Inject lateinit var credentials: Credentials
     @Inject lateinit var messageEncrypter: MessageEncrypter
     @Inject lateinit var ensureOlmSessionsForDevicesAction: EnsureOlmSessionsForDevicesAction
+    @Inject lateinit var clock: Clock
 
     override fun injectWith(injector: SessionComponent) {
         injector.inject(this)
@@ -129,7 +131,7 @@ internal class SendGossipWorker(
                 content = toDeviceContent.toContent(),
                 senderId = credentials.userId
         ).also {
-            it.ageLocalTs = System.currentTimeMillis()
+            it.ageLocalTs = clock.epochMillis()
         })
 
         try {

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/actions/MegolmSessionDataImporter.kt

@@ -26,13 +26,17 @@ import org.matrix.android.sdk.internal.crypto.OutgoingGossipingRequestManager
 import org.matrix.android.sdk.internal.crypto.RoomDecryptorProvider
 import org.matrix.android.sdk.internal.crypto.algorithms.megolm.MXMegolmDecryption
 import org.matrix.android.sdk.internal.crypto.store.IMXCryptoStore
+import org.matrix.android.sdk.internal.util.time.Clock
 import timber.log.Timber
 import javax.inject.Inject
 
-internal class MegolmSessionDataImporter @Inject constructor(private val olmDevice: MXOlmDevice,
+internal class MegolmSessionDataImporter @Inject constructor(
+        private val olmDevice: MXOlmDevice,
         private val roomDecryptorProvider: RoomDecryptorProvider,
         private val outgoingGossipingRequestManager: OutgoingGossipingRequestManager,
-                                                             private val cryptoStore: IMXCryptoStore) {
+        private val cryptoStore: IMXCryptoStore,
+        private val clock: Clock,
+) {
 
     /**
      * Import a list of megolm session keys.
@@ -47,7 +51,7 @@ internal class MegolmSessionDataImporter @Inject constructor(private val olmDevi
     fun handle(megolmSessionsData: List<MegolmSessionData>,
                fromBackup: Boolean,
                progressListener: ProgressListener?): ImportRoomKeysResult {
-        val t0 = System.currentTimeMillis()
+        val t0 = clock.epochMillis()
 
         val totalNumbersOfKeys = megolmSessionsData.size
         var lastProgress = 0
@@ -103,7 +107,7 @@ internal class MegolmSessionDataImporter @Inject constructor(private val olmDevi
             cryptoStore.markBackupDoneForInboundGroupSessions(olmInboundGroupSessionWrappers)
         }
 
-        val t1 = System.currentTimeMillis()
+        val t1 = clock.epochMillis()
 
         Timber.v("## importMegolmSessionsData : sessions import " + (t1 - t0) + " ms (" + megolmSessionsData.size + " sessions)")
 

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/algorithms/megolm/MXMegolmEncryption.kt

@@ -46,6 +46,7 @@ import org.matrix.android.sdk.internal.crypto.store.IMXCryptoStore
 import org.matrix.android.sdk.internal.crypto.tasks.SendToDeviceTask
 import org.matrix.android.sdk.internal.util.JsonCanonicalizer
 import org.matrix.android.sdk.internal.util.convertToUTF8
+import org.matrix.android.sdk.internal.util.time.Clock
 import timber.log.Timber
 
 private val loggerTag = LoggerTag("MXMegolmEncryption", LoggerTag.CRYPTO)
@@ -64,7 +65,8 @@ internal class MXMegolmEncryption(
         private val messageEncrypter: MessageEncrypter,
         private val warnOnUnknownDevicesRepository: WarnOnUnknownDeviceRepository,
         private val coroutineDispatchers: MatrixCoroutineDispatchers,
-        private val cryptoCoroutineScope: CoroutineScope
+        private val cryptoCoroutineScope: CoroutineScope,
+        private val clock: Clock,
 ) : IMXEncrypting, IMXGroupEncryption {
 
     // OutboundSessionInfo. Null if we haven't yet started setting one up. Note
@@ -86,11 +88,11 @@ internal class MXMegolmEncryption(
     override suspend fun encryptEventContent(eventContent: Content,
                                              eventType: String,
                                              userIds: List<String>): Content {
-        val ts = System.currentTimeMillis()
+        val ts = clock.epochMillis()
         Timber.tag(loggerTag.value).v("encryptEventContent : getDevicesInRoom")
         val devices = getDevicesInRoom(userIds)
         Timber.tag(loggerTag.value).d("encrypt event in room=$roomId - devices count in room ${devices.allowedDevices.toDebugCount()}")
-        Timber.tag(loggerTag.value).v("encryptEventContent ${System.currentTimeMillis() - ts}: getDevicesInRoom ${devices.allowedDevices.toDebugString()}")
+        Timber.tag(loggerTag.value).v("encryptEventContent ${clock.epochMillis() - ts}: getDevicesInRoom ${devices.allowedDevices.toDebugString()}")
         val outboundSession = ensureOutboundSession(devices.allowedDevices)
 
         return encryptContent(outboundSession, eventType, eventContent)
@@ -99,7 +101,7 @@ internal class MXMegolmEncryption(
                     // annoyingly we have to serialize again the saved outbound session to store message index :/
                     // if not we would see duplicate message index errors
                     olmDevice.storeOutboundGroupSessionForRoom(roomId, outboundSession.sessionId)
-                    Timber.tag(loggerTag.value).d("encrypt event in room=$roomId Finished in ${System.currentTimeMillis() - ts} millis")
+                    Timber.tag(loggerTag.value).d("encrypt event in room=$roomId Finished in ${clock.epochMillis() - ts} millis")
                 }
     }
 
@@ -125,14 +127,14 @@ internal class MXMegolmEncryption(
     }
 
     override suspend fun preshareKey(userIds: List<String>) {
-        val ts = System.currentTimeMillis()
+        val ts = clock.epochMillis()
         Timber.tag(loggerTag.value).d("preshareKey started in $roomId ...")
         val devices = getDevicesInRoom(userIds)
         val outboundSession = ensureOutboundSession(devices.allowedDevices)
 
         notifyWithheldForSession(devices.withHeldDevices, outboundSession)
 
-        Timber.tag(loggerTag.value).d("preshareKey in $roomId done in  ${System.currentTimeMillis() - ts} millis")
+        Timber.tag(loggerTag.value).d("preshareKey in $roomId done in  ${clock.epochMillis() - ts} millis")
     }
 
     /**
@@ -148,12 +150,14 @@ internal class MXMegolmEncryption(
                 "ed25519" to olmDevice.deviceEd25519Key!!
         )
 
-        olmDevice.addInboundGroupSession(sessionId!!, olmDevice.getSessionKey(sessionId)!!, roomId, olmDevice.deviceCurve25519Key!!,
+        olmDevice.addInboundGroupSession(
-                emptyList(), keysClaimedMap, false)
+                sessionId!!, olmDevice.getSessionKey(sessionId)!!, roomId, olmDevice.deviceCurve25519Key!!,
+                emptyList(), keysClaimedMap, false
+        )
 
         defaultKeysBackupService.maybeBackupKeys()
 
-        return MXOutboundSessionInfo(sessionId, SharedWithHelper(roomId, sessionId, cryptoStore))
+        return MXOutboundSessionInfo(sessionId, SharedWithHelper(roomId, sessionId, cryptoStore), clock)
     }
 
     /**
@@ -243,12 +247,12 @@ internal class MXMegolmEncryption(
         payload["type"] = EventType.ROOM_KEY
         payload["content"] = submap
 
-        var t0 = System.currentTimeMillis()
+        var t0 = clock.epochMillis()
         Timber.tag(loggerTag.value).v("shareUserDevicesKey() : starts")
 
         val results = ensureOlmSessionsForDevicesAction.handle(devicesByUser)
         Timber.tag(loggerTag.value).v(
-                """shareUserDevicesKey(): ensureOlmSessionsForDevices succeeds after ${System.currentTimeMillis() - t0} ms"""
+                """shareUserDevicesKey(): ensureOlmSessionsForDevices succeeds after ${clock.epochMillis() - t0} ms"""
                         .trimMargin()
         )
         val contentMap = MXUsersDevicesMap<Any>()
@@ -301,7 +305,7 @@ internal class MXMegolmEncryption(
         cryptoStore.saveGossipingEvents(gossipingEventBuffer)
 
         if (haveTargets) {
-            t0 = System.currentTimeMillis()
+            t0 = clock.epochMillis()
             Timber.tag(loggerTag.value).i("shareUserDevicesKey() ${session.sessionId} : has target")
             Timber.tag(loggerTag.value).d("sending to device room key for ${session.sessionId} to ${contentMap.toDebugString()}")
             val sendToDeviceParams = SendToDeviceTask.Params(EventType.ENCRYPTED, contentMap)
@@ -309,7 +313,7 @@ internal class MXMegolmEncryption(
                 withContext(coroutineDispatchers.io) {
                     sendToDeviceTask.execute(sendToDeviceParams)
                 }
-                Timber.tag(loggerTag.value).i("shareUserDevicesKey() : sendToDevice succeeds after ${System.currentTimeMillis() - t0} ms")
+                Timber.tag(loggerTag.value).i("shareUserDevicesKey() : sendToDevice succeeds after ${clock.epochMillis() - t0} ms")
             } catch (failure: Throwable) {
                 // What to do here...
                 Timber.tag(loggerTag.value).e("shareUserDevicesKey() : Failed to share <${session.sessionId}>")
@@ -334,7 +338,8 @@ internal class MXMegolmEncryption(
                                           senderKey: String?,
                                           code: WithHeldCode) {
         Timber.tag(loggerTag.value).d("notifyKeyWithHeld() :sending withheld for session:$sessionId and code $code to" +
-                " ${targets.joinToString { "${it.userId}|${it.deviceId}" }}")
+                " ${targets.joinToString { "${it.userId}|${it.deviceId}" }}"
+        )
         val withHeldContent = RoomKeyWithHeldContent(
                 roomId = roomId,
                 senderKey = senderKey,

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/algorithms/megolm/MXMegolmEncryptionFactory.kt

@@ -28,6 +28,7 @@ import org.matrix.android.sdk.internal.crypto.store.IMXCryptoStore
 import org.matrix.android.sdk.internal.crypto.tasks.SendToDeviceTask
 import org.matrix.android.sdk.internal.di.DeviceId
 import org.matrix.android.sdk.internal.di.UserId
+import org.matrix.android.sdk.internal.util.time.Clock
 import javax.inject.Inject
 
 internal class MXMegolmEncryptionFactory @Inject constructor(
@@ -42,7 +43,9 @@ internal class MXMegolmEncryptionFactory @Inject constructor(
         private val messageEncrypter: MessageEncrypter,
         private val warnOnUnknownDevicesRepository: WarnOnUnknownDeviceRepository,
         private val coroutineDispatchers: MatrixCoroutineDispatchers,
-        private val cryptoCoroutineScope: CoroutineScope) {
+        private val cryptoCoroutineScope: CoroutineScope,
+        private val clock: Clock,
+) {
 
     fun create(roomId: String): MXMegolmEncryption {
         return MXMegolmEncryption(
@@ -58,7 +61,8 @@ internal class MXMegolmEncryptionFactory @Inject constructor(
                 messageEncrypter = messageEncrypter,
                 warnOnUnknownDevicesRepository = warnOnUnknownDevicesRepository,
                 coroutineDispatchers = coroutineDispatchers,
-                cryptoCoroutineScope = cryptoCoroutineScope
+                cryptoCoroutineScope = cryptoCoroutineScope,
+                clock = clock,
         )
     }
 }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/algorithms/megolm/MXOutboundSessionInfo.kt

@@ -18,21 +18,24 @@ package org.matrix.android.sdk.internal.crypto.algorithms.megolm
 
 import org.matrix.android.sdk.api.session.crypto.model.CryptoDeviceInfo
 import org.matrix.android.sdk.api.session.crypto.model.MXUsersDevicesMap
+import org.matrix.android.sdk.internal.util.time.Clock
 import timber.log.Timber
 
 internal class MXOutboundSessionInfo(
         // The id of the session
         val sessionId: String,
         val sharedWithHelper: SharedWithHelper,
+        private val clock: Clock,
         // When the session was created
-        private val creationTime: Long = System.currentTimeMillis()) {
+        private val creationTime: Long = clock.epochMillis(),
+) {
 
     // Number of times this session has been used
     var useCount: Int = 0
 
     fun needsRotation(rotationPeriodMsgs: Int, rotationPeriodMs: Int): Boolean {
         var needsRotation = false
-        val sessionLifetime = System.currentTimeMillis() - creationTime
+        val sessionLifetime = clock.epochMillis() - creationTime
 
         if (useCount >= rotationPeriodMsgs || sessionLifetime >= rotationPeriodMs) {
             Timber.v("## needsRotation() : Rotating megolm session after $useCount, ${sessionLifetime}ms")

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/attachments/MXEncryptedAttachments.kt

@@ -23,6 +23,7 @@ import org.matrix.android.sdk.api.session.crypto.model.EncryptedFileKey
 import org.matrix.android.sdk.internal.util.base64ToBase64Url
 import org.matrix.android.sdk.internal.util.base64ToUnpaddedBase64
 import org.matrix.android.sdk.internal.util.base64UrlToBase64
+import org.matrix.android.sdk.internal.util.time.Clock
 import timber.log.Timber
 import java.io.ByteArrayOutputStream
 import java.io.File
@@ -42,8 +43,9 @@ internal object MXEncryptedAttachments {
 
     fun encrypt(clearStream: InputStream,
                 outputFile: File,
+                clock: Clock,
                 progress: ((current: Int, total: Int) -> Unit)): EncryptedFileInfo {
-        val t0 = System.currentTimeMillis()
+        val t0 = clock.epochMillis()
         val secureRandom = SecureRandom()
         val initVectorBytes = ByteArray(16) { 0.toByte() }
 
@@ -100,7 +102,7 @@ internal object MXEncryptedAttachments {
                 hashes = mapOf("sha256" to base64ToUnpaddedBase64(Base64.encodeToString(messageDigest.digest(), Base64.DEFAULT))),
                 v = "v2"
         )
-                .also { Timber.v("Encrypt in ${System.currentTimeMillis() - t0}ms") }
+                .also { Timber.v("Encrypt in ${clock.epochMillis() - t0}ms") }
     }
 
 //    fun cipherInputStream(attachmentStream: InputStream, mimetype: String?): Pair<DigestInputStream, EncryptedFileInfo> {
@@ -159,8 +161,8 @@ internal object MXEncryptedAttachments {
      * @param attachmentStream the attachment stream. Will be closed after this method call.
      * @return the encryption file info
      */
-    fun encryptAttachment(attachmentStream: InputStream): EncryptionResult {
+    fun encryptAttachment(attachmentStream: InputStream, clock: Clock): EncryptionResult {
-        val t0 = System.currentTimeMillis()
+        val t0 = clock.epochMillis()
         val secureRandom = SecureRandom()
 
         // generate a random iv key
@@ -221,7 +223,7 @@ internal object MXEncryptedAttachments {
                 ),
                 encryptedByteArray = byteArrayOutputStream.toByteArray()
         )
-                .also { Timber.v("Encrypt in ${System.currentTimeMillis() - t0}ms") }
+                .also { Timber.v("Encrypt in ${clock.epochMillis() - t0}ms") }
     }
 
     /**
@@ -234,14 +236,16 @@ internal object MXEncryptedAttachments {
      */
     fun decryptAttachment(attachmentStream: InputStream?,
                           elementToDecrypt: ElementToDecrypt?,
-                          outputStream: OutputStream): Boolean {
+                          outputStream: OutputStream,
+                          clock: Clock
+    ): Boolean {
         // sanity checks
         if (null == attachmentStream || elementToDecrypt == null) {
             Timber.e("## decryptAttachment() : null stream")
             return false
         }
 
-        val t0 = System.currentTimeMillis()
+        val t0 = clock.epochMillis()
 
         try {
             val key = Base64.decode(base64UrlToBase64(elementToDecrypt.k), Base64.DEFAULT)
@@ -279,7 +283,8 @@ internal object MXEncryptedAttachments {
                 return false
             }
 
-            return true.also { Timber.v("Decrypt in ${System.currentTimeMillis() - t0}ms") }
+            Timber.v("Decrypt in ${clock.epochMillis() - t0} ms")
+            return true
         } catch (oom: OutOfMemoryError) {
             Timber.e(oom, "## decryptAttachment() failed: OOM")
         } catch (e: Exception) {

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/keysbackup/KeysBackupPassword.kt

@@ -26,6 +26,7 @@ import java.util.UUID
 import javax.crypto.Mac
 import javax.crypto.spec.SecretKeySpec
 import kotlin.experimental.xor
+import kotlin.system.measureTimeMillis
 
 private const val SALT_LENGTH = 32
 private const val DEFAULT_ITERATION = 500_000
@@ -91,20 +92,20 @@ internal fun deriveKey(password: String,
                        iterations: Int,
                        progressListener: ProgressListener?): ByteArray {
     // Note: copied and adapted from MXMegolmExportEncryption
-    val t0 = System.currentTimeMillis()
-
     // based on https://en.wikipedia.org/wiki/PBKDF2 algorithm
     // it is simpler than the generic algorithm because the expected key length is equal to the mac key length.
     // noticed as dklen/hlen
 
+    // 256 bits key length
+    val dk = ByteArray(32)
+
+    measureTimeMillis {
         // dklen = 256
         // hlen = 512
         val prf = Mac.getInstance("HmacSHA512")
 
         prf.init(SecretKeySpec(password.toByteArray(), "HmacSHA512"))
 
-    // 256 bits key length
-    val dk = ByteArray(32)
         val uc = ByteArray(64)
 
         // U1 = PRF(Password, Salt || INT_32_BE(i)) with i goes from 1 to dklen/hlen
@@ -134,8 +135,9 @@ internal fun deriveKey(password: String,
                 progressListener?.onProgress(lastProgress, 100)
             }
         }
-
+    }.also {
-    Timber.v("KeysBackupPassword: deriveKeys() : " + iterations + " in " + (System.currentTimeMillis() - t0) + " ms")
+        Timber.v("KeysBackupPassword: deriveKeys() : $iterations in $it ms")
+    }
 
     return dk
 }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/model/OlmSessionWrapper.kt

@@ -34,7 +34,7 @@ internal data class OlmSessionWrapper(
     /**
      * Notify that a message has been received on this olm session so that it updates `lastReceivedMessageTs`
      */
-    fun onMessageReceived() {
+    fun onMessageReceived(currentTimeMillis: Long) {
-        lastReceivedMessageTs = System.currentTimeMillis()
+        lastReceivedMessageTs = currentTimeMillis
     }
 }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/store/db/RealmCryptoStore.kt

@@ -97,6 +97,7 @@ import org.matrix.android.sdk.internal.di.MoshiProvider
 import org.matrix.android.sdk.internal.di.UserId
 import org.matrix.android.sdk.internal.extensions.clearWith
 import org.matrix.android.sdk.internal.session.SessionScope
+import org.matrix.android.sdk.internal.util.time.Clock
 import org.matrix.olm.OlmAccount
 import org.matrix.olm.OlmException
 import org.matrix.olm.OlmOutboundGroupSession
@@ -110,7 +111,8 @@ internal class RealmCryptoStore @Inject constructor(
         @CryptoDatabase private val realmConfiguration: RealmConfiguration,
         private val crossSigningKeysMapper: CrossSigningKeysMapper,
         @UserId private val userId: String,
-        @DeviceId private val deviceId: String?
+        @DeviceId private val deviceId: String?,
+        private val clock: Clock,
 ) : IMXCryptoStore {
 
     /* ==========================================================================================
@@ -307,7 +309,7 @@ internal class RealmCryptoStore @Inject constructor(
                         // Add the device
                         Timber.d("Add device ${cryptoDeviceInfo.deviceId} of user $userId")
                         val newEntity = CryptoMapper.mapToEntity(cryptoDeviceInfo)
-                        newEntity.firstTimeSeenLocalTs = System.currentTimeMillis()
+                        newEntity.firstTimeSeenLocalTs = clock.epochMillis()
                         userEntity.devices.add(newEntity)
                     } else {
                         // Update the device
@@ -792,7 +794,7 @@ internal class RealmCryptoStore @Inject constructor(
 
                 if (outboundGroupSession != null) {
                     val info = realm.createObject(OutboundGroupSessionInfoEntity::class.java).apply {
-                        creationTime = System.currentTimeMillis()
+                        creationTime = clock.epochMillis()
                         putOutboundGroupSession(outboundGroupSession)
                     }
                     entity.outboundSessionInfo = info
@@ -882,7 +884,8 @@ internal class RealmCryptoStore @Inject constructor(
                 try {
                     val key = OlmInboundGroupSessionEntity.createPrimaryKey(
                             olmInboundGroupSessionWrapper.olmInboundGroupSession?.sessionIdentifier(),
-                            olmInboundGroupSessionWrapper.senderKey)
+                            olmInboundGroupSessionWrapper.senderKey
+                    )
 
                     it.where<OlmInboundGroupSessionEntity>()
                             .equalTo(OlmInboundGroupSessionEntityFields.PRIMARY_KEY, key)
@@ -1057,13 +1060,16 @@ internal class RealmCryptoStore @Inject constructor(
                             localCreationTimestamp = 0
                     )
         }
-        return monarchy.findAllPagedWithChanges(realmDataSourceFactory,
+        return monarchy.findAllPagedWithChanges(
-                LivePagedListBuilder(dataSourceFactory,
+                realmDataSourceFactory,
+                LivePagedListBuilder(
+                        dataSourceFactory,
                         PagedList.Config.Builder()
                                 .setPageSize(20)
                                 .setEnablePlaceholders(false)
                                 .setPrefetchDistance(1)
-                                .build())
+                                .build()
+                )
         )
     }
 
@@ -1072,13 +1078,16 @@ internal class RealmCryptoStore @Inject constructor(
             realm.where<GossipingEventEntity>().sort(GossipingEventEntityFields.AGE_LOCAL_TS, Sort.DESCENDING)
         }
         val dataSourceFactory = realmDataSourceFactory.map { it.toModel() }
-        val trail = monarchy.findAllPagedWithChanges(realmDataSourceFactory,
+        val trail = monarchy.findAllPagedWithChanges(
-                LivePagedListBuilder(dataSourceFactory,
+                realmDataSourceFactory,
+                LivePagedListBuilder(
+                        dataSourceFactory,
                         PagedList.Config.Builder()
                                 .setPageSize(20)
                                 .setEnablePlaceholders(false)
                                 .setPrefetchDistance(1)
-                                .build())
+                                .build()
+                )
         )
         return trail
     }
@@ -1153,7 +1162,7 @@ internal class RealmCryptoStore @Inject constructor(
 
     override fun saveGossipingEvents(events: List<Event>) {
         monarchy.writeAsync { realm ->
-            val now = System.currentTimeMillis()
+            val now = clock.epochMillis()
             events.forEach { event ->
                 val ageLocalTs = event.unsignedData?.age?.let { now - it } ?: now
                 val entity = GossipingEventEntity(
@@ -1359,7 +1368,7 @@ internal class RealmCryptoStore @Inject constructor(
                 it.otherUserId = request.userId
                 it.requestId = request.requestId ?: ""
                 it.requestState = GossipingRequestState.PENDING
-                it.localCreationTimestamp = ageLocalTS ?: System.currentTimeMillis()
+                it.localCreationTimestamp = ageLocalTS ?: clock.epochMillis()
                 if (request is IncomingSecretShareRequest) {
                     it.type = GossipRequestType.SECRET
                     it.requestedInfoStr = request.secretName
@@ -1380,7 +1389,7 @@ internal class RealmCryptoStore @Inject constructor(
                     it.otherUserId = request.userId
                     it.requestId = request.requestId ?: ""
                     it.requestState = GossipingRequestState.PENDING
-                    it.localCreationTimestamp = request.localCreationTimestamp ?: System.currentTimeMillis()
+                    it.localCreationTimestamp = request.localCreationTimestamp ?: clock.epochMillis()
                     if (request is IncomingSecretShareRequest) {
                         it.type = GossipRequestType.SECRET
                         it.requestedInfoStr = request.secretName
@@ -1536,13 +1545,16 @@ internal class RealmCryptoStore @Inject constructor(
             it.toOutgoingGossipingRequest() as? OutgoingRoomKeyRequest
                     ?: OutgoingRoomKeyRequest(requestBody = null, requestId = "?", recipients = emptyMap(), state = OutgoingGossipingRequestState.CANCELLED)
         }
-        val trail = monarchy.findAllPagedWithChanges(realmDataSourceFactory,
+        val trail = monarchy.findAllPagedWithChanges(
-                LivePagedListBuilder(dataSourceFactory,
+                realmDataSourceFactory,
+                LivePagedListBuilder(
+                        dataSourceFactory,
                         PagedList.Config.Builder()
                                 .setPageSize(20)
                                 .setEnablePlaceholders(false)
                                 .setPrefetchDistance(1)
-                                .build())
+                                .build()
+                )
         )
         return trail
     }
@@ -1707,7 +1719,7 @@ internal class RealmCryptoStore @Inject constructor(
      * So we need to tidy up a bit
      */
     override fun tidyUpDataBase() {
-        val prevWeekTs = System.currentTimeMillis() - 7 * 24 * 60 * 60 * 1_000
+        val prevWeekTs = clock.epochMillis() - 7 * 24 * 60 * 60 * 1_000
         doRealmTransaction(realmConfiguration) { realm ->
 
             // Only keep one week history

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/store/db/RealmCryptoStoreMigration.kt

@@ -33,10 +33,13 @@ import org.matrix.android.sdk.internal.crypto.store.db.migration.MigrateCryptoTo
 import org.matrix.android.sdk.internal.crypto.store.db.migration.MigrateCryptoTo013
 import org.matrix.android.sdk.internal.crypto.store.db.migration.MigrateCryptoTo014
 import org.matrix.android.sdk.internal.crypto.store.db.migration.MigrateCryptoTo015
+import org.matrix.android.sdk.internal.util.time.Clock
 import timber.log.Timber
 import javax.inject.Inject
 
-internal class RealmCryptoStoreMigration @Inject constructor() : RealmMigration {
+internal class RealmCryptoStoreMigration @Inject constructor(
+        private val clock: Clock,
+) : RealmMigration {
     /**
      * Forces all RealmCryptoStoreMigration instances to be equal
      * Avoids Realm throwing when multiple instances of the migration are set
@@ -59,7 +62,7 @@ internal class RealmCryptoStoreMigration @Inject constructor() : RealmMigration
         if (oldVersion < 5) MigrateCryptoTo005(realm).perform()
         if (oldVersion < 6) MigrateCryptoTo006(realm).perform()
         if (oldVersion < 7) MigrateCryptoTo007(realm).perform()
-        if (oldVersion < 8) MigrateCryptoTo008(realm).perform()
+        if (oldVersion < 8) MigrateCryptoTo008(realm, clock).perform()
         if (oldVersion < 9) MigrateCryptoTo009(realm).perform()
         if (oldVersion < 10) MigrateCryptoTo010(realm).perform()
         if (oldVersion < 11) MigrateCryptoTo011(realm).perform()

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/store/db/migration/MigrateCryptoTo008.kt

@@ -21,8 +21,12 @@ import org.matrix.android.sdk.api.extensions.tryOrNull
 import org.matrix.android.sdk.internal.crypto.store.db.model.DeviceInfoEntityFields
 import org.matrix.android.sdk.internal.crypto.store.db.model.MyDeviceLastSeenInfoEntityFields
 import org.matrix.android.sdk.internal.util.database.RealmMigrator
+import org.matrix.android.sdk.internal.util.time.Clock
 
-internal class MigrateCryptoTo008(realm: DynamicRealm) : RealmMigrator(realm, 8) {
+internal class MigrateCryptoTo008(
+        realm: DynamicRealm,
+        private val clock: Clock,
+) : RealmMigrator(realm, 8) {
 
     override fun doMigrate(realm: DynamicRealm) {
         realm.schema.create("MyDeviceLastSeenInfoEntity")
@@ -33,7 +37,7 @@ internal class MigrateCryptoTo008(realm: DynamicRealm) : RealmMigrator(realm, 8)
                 .addField(MyDeviceLastSeenInfoEntityFields.LAST_SEEN_TS, Long::class.java)
                 .setNullable(MyDeviceLastSeenInfoEntityFields.LAST_SEEN_TS, true)
 
-        val now = System.currentTimeMillis()
+        val now = clock.epochMillis()
         realm.schema.get("DeviceInfoEntity")
                 ?.addField(DeviceInfoEntityFields.FIRST_TIME_SEEN_LOCAL_TS, Long::class.java)
                 ?.setNullable(DeviceInfoEntityFields.FIRST_TIME_SEEN_LOCAL_TS, true)

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/verification/DefaultOutgoingSASDefaultVerificationTransaction.kt

@@ -123,7 +123,7 @@ internal class DefaultOutgoingSASDefaultVerificationTransaction(
 //        val requestMessage = KeyVerificationRequest(
 //                fromDevice = session.sessionParams.deviceId ?: "",
 //                methods = listOf(KeyVerificationStart.VERIF_METHOD_SAS),
-//                timestamp = System.currentTimeMillis().toInt(),
+//                timestamp = clock.epochMillis().toInt(),
 //                transactionId = transactionId
 //        )
 //

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/verification/DefaultVerificationService.kt

@@ -84,6 +84,7 @@ import org.matrix.android.sdk.internal.di.DeviceId
 import org.matrix.android.sdk.internal.di.UserId
 import org.matrix.android.sdk.internal.session.SessionScope
 import org.matrix.android.sdk.internal.task.TaskExecutor
+import org.matrix.android.sdk.internal.util.time.Clock
 import timber.log.Timber
 import java.util.UUID
 import javax.inject.Inject
@@ -104,7 +105,8 @@ internal class DefaultVerificationService @Inject constructor(
         private val verificationTransportToDeviceFactory: VerificationTransportToDeviceFactory,
         private val crossSigningService: CrossSigningService,
         private val cryptoCoroutineScope: CoroutineScope,
-        private val taskExecutor: TaskExecutor
+        private val taskExecutor: TaskExecutor,
+        private val clock: Clock,
 ) : DefaultVerificationTransaction.Listener, VerificationService {
 
     private val uiHandler = Handler(Looper.getMainLooper())
@@ -261,9 +263,11 @@ internal class DefaultVerificationService @Inject constructor(
     }
 
     override fun markedLocallyAsManuallyVerified(userId: String, deviceID: String) {
-        setDeviceVerificationAction.handle(DeviceTrustLevel(false, true),
+        setDeviceVerificationAction.handle(
+                DeviceTrustLevel(crossSigningVerified = false, locallyVerified = true),
                 userId,
-                deviceID)
+                deviceID
+        )
 
         listeners.forEach {
             try {
@@ -313,7 +317,7 @@ internal class DefaultVerificationService @Inject constructor(
         val requestsForUser = pendingRequests.getOrPut(senderId) { mutableListOf() }
 
         val pendingVerificationRequest = PendingVerificationRequest(
-                ageLocalTs = event.ageLocalTs ?: System.currentTimeMillis(),
+                ageLocalTs = event.ageLocalTs ?: clock.epochMillis(),
                 isIncoming = true,
                 otherUserId = senderId, // requestInfo.toUserId,
                 roomId = null,
@@ -352,7 +356,7 @@ internal class DefaultVerificationService @Inject constructor(
         val requestsForUser = pendingRequests.getOrPut(senderId) { mutableListOf() }
 
         val pendingVerificationRequest = PendingVerificationRequest(
-                ageLocalTs = event.ageLocalTs ?: System.currentTimeMillis(),
+                ageLocalTs = event.ageLocalTs ?: clock.epochMillis(),
                 isIncoming = true,
                 otherUserId = senderId, // requestInfo.toUserId,
                 roomId = event.roomId,
@@ -552,7 +556,8 @@ internal class DefaultVerificationService @Inject constructor(
                             myDeviceInfoHolder.get().myDevice.fingerprint()!!,
                             startReq.transactionId,
                             otherUserId,
-                            autoAccept).also { txConfigure(it) }
+                            autoAccept
+                    ).also { txConfigure(it) }
                     addTransaction(tx)
                     tx.onVerificationStart(startReq)
                     return null
@@ -644,9 +649,11 @@ internal class DefaultVerificationService @Inject constructor(
 
         if (existingRequest != null) {
             // Mark this request as cancelled
-            updatePendingRequest(existingRequest.copy(
+            updatePendingRequest(
+                    existingRequest.copy(
                             cancelConclusion = safeValueOf(cancelReq.code)
-            ))
+                    )
+            )
         }
 
         existingTransaction?.state = VerificationTxState.Cancelled(safeValueOf(cancelReq.code), false)
@@ -809,15 +816,19 @@ internal class DefaultVerificationService @Inject constructor(
                             ?.let { vt ->
                                 val otherDeviceId = vt.otherDeviceId
                                 if (!crossSigningService.canCrossSign()) {
-                                    outgoingGossipingRequestManager.sendSecretShareRequest(MASTER_KEY_SSSS_NAME, mapOf(userId to listOf(otherDeviceId
+                                    outgoingGossipingRequestManager.sendSecretShareRequest(
-                                            ?: "*")))
+                                            MASTER_KEY_SSSS_NAME, mapOf(userId to listOf(otherDeviceId ?: "*"))
-                                    outgoingGossipingRequestManager.sendSecretShareRequest(SELF_SIGNING_KEY_SSSS_NAME, mapOf(userId to listOf(otherDeviceId
+                                    )
-                                            ?: "*")))
+                                    outgoingGossipingRequestManager.sendSecretShareRequest(
-                                    outgoingGossipingRequestManager.sendSecretShareRequest(USER_SIGNING_KEY_SSSS_NAME, mapOf(userId to listOf(otherDeviceId
+                                            SELF_SIGNING_KEY_SSSS_NAME, mapOf(userId to listOf(otherDeviceId ?: "*"))
-                                            ?: "*")))
+                                    )
+                                    outgoingGossipingRequestManager.sendSecretShareRequest(
+                                            USER_SIGNING_KEY_SSSS_NAME, mapOf(userId to listOf(otherDeviceId ?: "*"))
+                                    )
                                 }
-                                outgoingGossipingRequestManager.sendSecretShareRequest(KEYBACKUP_SECRET_SSSS_NAME, mapOf(userId to listOf(otherDeviceId
+                                outgoingGossipingRequestManager.sendSecretShareRequest(
-                                        ?: "*")))
+                                        KEYBACKUP_SECRET_SSSS_NAME, mapOf(userId to listOf(otherDeviceId ?: "*"))
+                                )
                             }
         }
     }
@@ -917,16 +928,19 @@ internal class DefaultVerificationService @Inject constructor(
                     qrCodeData = qrCodeData,
                     userId = userId,
                     deviceId = deviceId ?: "",
-                    isIncoming = false)
+                    isIncoming = false
+            )
 
             tx.transport = transportCreator.invoke(tx)
 
             addTransaction(tx)
         }
 
-        updatePendingRequest(existingRequest.copy(
+        updatePendingRequest(
+                existingRequest.copy(
                         readyInfo = readyReq
-        ))
+                )
+        )
     }
 
     private fun createQrCodeData(requestId: String?, otherUserId: String, otherDeviceId: String?): QrCodeData? {
@@ -1115,7 +1129,8 @@ internal class DefaultVerificationService @Inject constructor(
                     myDeviceInfoHolder.get().myDevice.fingerprint()!!,
                     txID,
                     otherUserId,
-                    otherDeviceId)
+                    otherDeviceId
+            )
             tx.transport = verificationTransportToDeviceFactory.createTransport(tx)
             addTransaction(tx)
 
@@ -1150,7 +1165,7 @@ internal class DefaultVerificationService @Inject constructor(
         val validLocalId = localId ?: LocalEcho.createLocalEchoId()
 
         val verificationRequest = PendingVerificationRequest(
-                ageLocalTs = System.currentTimeMillis(),
+                ageLocalTs = clock.epochMillis(),
                 isIncoming = false,
                 roomId = roomId,
                 localId = validLocalId,
@@ -1175,11 +1190,13 @@ internal class DefaultVerificationService @Inject constructor(
 
         transport.sendVerificationRequest(methodValues, validLocalId, otherUserId, roomId, null) { syncedId, info ->
             // We need to update with the syncedID
-            updatePendingRequest(verificationRequest.copy(
+            updatePendingRequest(
+                    verificationRequest.copy(
                             transactionId = syncedId,
                             // localId stays different
                             requestInfo = info
-            ))
+                    )
+            )
         }
 
         requestsForUser.add(verificationRequest)
@@ -1228,7 +1245,7 @@ internal class DefaultVerificationService @Inject constructor(
 
         val verificationRequest = PendingVerificationRequest(
                 transactionId = localId,
-                ageLocalTs = System.currentTimeMillis(),
+                ageLocalTs = clock.epochMillis(),
                 isIncoming = false,
                 roomId = null,
                 localId = localId,
@@ -1254,10 +1271,12 @@ internal class DefaultVerificationService @Inject constructor(
 
         transport.sendVerificationRequest(methodValues, localId, otherUserId, null, targetDevices) { _, info ->
             // Nothing special to do in to device mode
-            updatePendingRequest(verificationRequest.copy(
+            updatePendingRequest(
+                    verificationRequest.copy(
                             // localId stays different
                             requestInfo = info
-            ))
+                    )
+            )
         }
 
         requestsForUser.add(verificationRequest)
@@ -1271,9 +1290,11 @@ internal class DefaultVerificationService @Inject constructor(
                 .cancelTransaction(transactionId, otherUserId, null, CancelCode.User)
 
         getExistingVerificationRequest(otherUserId, transactionId)?.let {
-            updatePendingRequest(it.copy(
+            updatePendingRequest(
+                    it.copy(
                             cancelConclusion = CancelCode.User
-            ))
+                    )
+            )
         }
     }
 
@@ -1307,7 +1328,8 @@ internal class DefaultVerificationService @Inject constructor(
                     myDeviceInfoHolder.get().myDevice.fingerprint()!!,
                     transactionId,
                     otherUserId,
-                    otherDeviceId)
+                    otherDeviceId
+            )
             tx.transport = verificationTransportRoomMessageFactory.createTransport(roomId, tx)
             addTransaction(tx)
 
@@ -1333,7 +1355,8 @@ internal class DefaultVerificationService @Inject constructor(
                     otherUserId,
                     existingRequest.requestInfo?.fromDevice ?: "",
                     existingRequest.requestInfo?.methods,
-                    methods) {
+                    methods
+            ) {
                 verificationTransportRoomMessageFactory.createTransport(roomId, it)
             }
             if (methods.isNullOrEmpty()) {
@@ -1343,7 +1366,8 @@ internal class DefaultVerificationService @Inject constructor(
             }
             // TODO this is not yet related to a transaction, maybe we should use another method like for cancel?
             val readyMsg = transport.createReady(transactionId, deviceId ?: "", computedMethods)
-            transport.sendToOther(EventType.KEY_VERIFICATION_READY,
+            transport.sendToOther(
+                    EventType.KEY_VERIFICATION_READY,
                     readyMsg,
                     VerificationTxState.None,
                     CancelCode.User,
@@ -1372,7 +1396,8 @@ internal class DefaultVerificationService @Inject constructor(
                     otherUserId,
                     existingRequest.requestInfo?.fromDevice ?: "",
                     existingRequest.requestInfo?.methods,
-                    methods) {
+                    methods
+            ) {
                 verificationTransportToDeviceFactory.createTransport(it)
             }
             if (methods.isNullOrEmpty()) {
@@ -1446,7 +1471,8 @@ internal class DefaultVerificationService @Inject constructor(
                         qrCodeData = qrCodeData,
                         userId = userId,
                         deviceId = deviceId ?: "",
-                        isIncoming = false)
+                        isIncoming = false
+                )
 
                 tx.transport = transportCreator.invoke(tx)
 

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/verification/VerificationMessageProcessor.kt

@@ -34,11 +34,13 @@ import org.matrix.android.sdk.internal.database.model.EventInsertType
 import org.matrix.android.sdk.internal.di.DeviceId
 import org.matrix.android.sdk.internal.di.UserId
 import org.matrix.android.sdk.internal.session.EventInsertLiveProcessor
+import org.matrix.android.sdk.internal.util.time.Clock
 import timber.log.Timber
 import javax.inject.Inject
 
 internal class VerificationMessageProcessor @Inject constructor(
         private val eventDecryptor: EventDecryptor,
+        private val clock: Clock,
         private val verificationService: DefaultVerificationService,
         @UserId private val userId: String,
         @DeviceId private val deviceId: String?
@@ -71,8 +73,7 @@ internal class VerificationMessageProcessor @Inject constructor(
         // If the request is in the future by more than 5 minutes or more than 10 minutes in the past,
         // the message should be ignored by the receiver.
 
-        if (!VerificationService.isValidRequest(event.ageLocalTs
+        if (!VerificationService.isValidRequest(event.ageLocalTs ?: event.originServerTs, clock.epochMillis())) return Unit.also {
-                        ?: event.originServerTs)) return Unit.also {
             Timber.d("## SAS Verification live observer: msgId: ${event.eventId} is outdated")
         }
 

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/verification/VerificationTransportRoomMessage.kt

@@ -47,6 +47,7 @@ import org.matrix.android.sdk.internal.crypto.model.rest.VERIFICATION_METHOD_REC
 import org.matrix.android.sdk.internal.crypto.model.rest.VERIFICATION_METHOD_SAS
 import org.matrix.android.sdk.internal.di.WorkManagerProvider
 import org.matrix.android.sdk.internal.session.room.send.LocalEchoEventFactory
+import org.matrix.android.sdk.internal.util.time.Clock
 import org.matrix.android.sdk.internal.worker.SessionSafeCoroutineWorker
 import org.matrix.android.sdk.internal.worker.WorkerParamsFactory
 import timber.log.Timber
@@ -61,7 +62,8 @@ internal class VerificationTransportRoomMessage(
         private val roomId: String,
         private val localEchoEventFactory: LocalEchoEventFactory,
         private val tx: DefaultVerificationTransaction?,
-        private val coroutineScope: CoroutineScope
+        private val coroutineScope: CoroutineScope,
+        private val clock: Clock,
 ) : VerificationTransport {
 
     override fun <T> sendToOther(type: String,
@@ -77,10 +79,12 @@ internal class VerificationTransportRoomMessage(
                 content = verificationInfo.toEventContent()!!
         )
 
-        val workerParams = WorkerParamsFactory.toData(SendVerificationMessageWorker.Params(
+        val workerParams = WorkerParamsFactory.toData(
+                SendVerificationMessageWorker.Params(
                         sessionId = sessionId,
                         eventId = event.eventId ?: ""
-        ))
+                )
+        )
         val enqueueInfo = enqueueSendWork(workerParams)
 
         // I cannot just listen to the given work request, because when used in a uniqueWork,
@@ -155,7 +159,7 @@ internal class VerificationTransportRoomMessage(
                 transactionId = "",
                 fromDevice = userDeviceId ?: "",
                 methods = supportedMethods,
-                timestamp = System.currentTimeMillis()
+                timestamp = clock.epochMillis()
         )
 
         val info = MessageVerificationRequestContent(
@@ -175,10 +179,12 @@ internal class VerificationTransportRoomMessage(
                 content
         )
 
-        val workerParams = WorkerParamsFactory.toData(SendVerificationMessageWorker.Params(
+        val workerParams = WorkerParamsFactory.toData(
+                SendVerificationMessageWorker.Params(
                         sessionId = sessionId,
                         eventId = event.eventId ?: ""
-        ))
+                )
+        )
 
         val workRequest = workManagerProvider.matrixOneTimeWorkRequestBuilder<SendVerificationMessageWorker>()
                 .setConstraints(WorkManagerProvider.workConstraints)
@@ -230,10 +236,12 @@ internal class VerificationTransportRoomMessage(
                 roomId = roomId,
                 content = MessageVerificationCancelContent.create(transactionId, code).toContent()
         )
-        val workerParams = WorkerParamsFactory.toData(SendVerificationMessageWorker.Params(
+        val workerParams = WorkerParamsFactory.toData(
+                SendVerificationMessageWorker.Params(
                         sessionId = sessionId,
                         eventId = event.eventId ?: ""
-        ))
+                )
+        )
         enqueueSendWork(workerParams)
     }
 
@@ -250,10 +258,12 @@ internal class VerificationTransportRoomMessage(
                         )
                 ).toContent()
         )
-        val workerParams = WorkerParamsFactory.toData(SendVerificationMessageWorker.Params(
+        val workerParams = WorkerParamsFactory.toData(
+                SendVerificationMessageWorker.Params(
                         sessionId = sessionId,
                         eventId = event.eventId ?: ""
-        ))
+                )
+        )
         val enqueueInfo = enqueueSendWork(workerParams)
 
         val workLiveData = workManagerProvider.workManager
@@ -361,7 +371,7 @@ internal class VerificationTransportRoomMessage(
     private fun createEventAndLocalEcho(localId: String = LocalEcho.createLocalEchoId(), type: String, roomId: String, content: Content): Event {
         return Event(
                 roomId = roomId,
-                originServerTs = System.currentTimeMillis(),
+                originServerTs = clock.epochMillis(),
                 senderId = userId,
                 eventId = localId,
                 type = type,

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/verification/VerificationTransportRoomMessageFactory.kt

@@ -22,6 +22,7 @@ import org.matrix.android.sdk.internal.di.UserId
 import org.matrix.android.sdk.internal.di.WorkManagerProvider
 import org.matrix.android.sdk.internal.session.room.send.LocalEchoEventFactory
 import org.matrix.android.sdk.internal.task.TaskExecutor
+import org.matrix.android.sdk.internal.util.time.Clock
 import javax.inject.Inject
 
 internal class VerificationTransportRoomMessageFactory @Inject constructor(
@@ -33,17 +34,21 @@ internal class VerificationTransportRoomMessageFactory @Inject constructor(
         @DeviceId
         private val deviceId: String?,
         private val localEchoEventFactory: LocalEchoEventFactory,
-        private val taskExecutor: TaskExecutor
+        private val taskExecutor: TaskExecutor,
+        private val clock: Clock,
 ) {
 
     fun createTransport(roomId: String, tx: DefaultVerificationTransaction?): VerificationTransportRoomMessage {
-        return VerificationTransportRoomMessage(workManagerProvider,
+        return VerificationTransportRoomMessage(
+                workManagerProvider,
                 sessionId,
                 userId,
                 deviceId,
                 roomId,
                 localEchoEventFactory,
                 tx,
-                taskExecutor.executorScope)
+                taskExecutor.executorScope,
+                clock
+        )
     }
 }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/verification/VerificationTransportToDevice.kt

@@ -35,13 +35,16 @@ import org.matrix.android.sdk.internal.crypto.model.rest.VERIFICATION_METHOD_SAS
 import org.matrix.android.sdk.internal.crypto.tasks.SendToDeviceTask
 import org.matrix.android.sdk.internal.task.TaskExecutor
 import org.matrix.android.sdk.internal.task.configureWith
+import org.matrix.android.sdk.internal.util.time.Clock
 import timber.log.Timber
 
+// TODO var could be val
 internal class VerificationTransportToDevice(
         private var tx: DefaultVerificationTransaction?,
         private var sendToDeviceTask: SendToDeviceTask,
         private val myDeviceId: String?,
-        private var taskExecutor: TaskExecutor
+        private var taskExecutor: TaskExecutor,
+        private val clock: Clock,
 ) : VerificationTransport {
 
     override fun sendVerificationRequest(supportedMethods: List<String>,
@@ -56,7 +59,7 @@ internal class VerificationTransportToDevice(
                 transactionId = localId,
                 fromDevice = myDeviceId ?: "",
                 methods = supportedMethods,
-                timestamp = System.currentTimeMillis()
+                timestamp = clock.epochMillis()
         )
         val keyReq = KeyVerificationRequest(
                 fromDevice = validKeyReq.fromDevice,
@@ -201,7 +204,8 @@ internal class VerificationTransportToDevice(
             hash,
             commitment,
             messageAuthenticationCode,
-            shortAuthenticationStrings)
+            shortAuthenticationStrings
+    )
 
     override fun createKey(tid: String, pubKey: String): VerificationInfoKey = KeyVerificationKey.create(tid, pubKey)
 
@@ -221,7 +225,8 @@ internal class VerificationTransportToDevice(
                 hashes,
                 messageAuthenticationCodes,
                 shortAuthenticationStrings,
-                null)
+                null
+        )
     }
 
     override fun createStartForQrCode(fromDevice: String,
@@ -235,7 +240,8 @@ internal class VerificationTransportToDevice(
                 null,
                 null,
                 null,
-                sharedSecret)
+                sharedSecret
+        )
     }
 
     override fun createReady(tid: String, fromDevice: String, methods: List<String>): VerificationInfoReady {

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/verification/VerificationTransportToDeviceFactory.kt

@@ -19,14 +19,17 @@ package org.matrix.android.sdk.internal.crypto.verification
 import org.matrix.android.sdk.internal.crypto.tasks.SendToDeviceTask
 import org.matrix.android.sdk.internal.di.DeviceId
 import org.matrix.android.sdk.internal.task.TaskExecutor
+import org.matrix.android.sdk.internal.util.time.Clock
 import javax.inject.Inject
 
 internal class VerificationTransportToDeviceFactory @Inject constructor(
         private val sendToDeviceTask: SendToDeviceTask,
         @DeviceId val myDeviceId: String?,
-        private val taskExecutor: TaskExecutor) {
+        private val taskExecutor: TaskExecutor,
+        private val clock: Clock,
+) {
 
     fun createTransport(tx: DefaultVerificationTransaction?): VerificationTransportToDevice {
-        return VerificationTransportToDevice(tx, sendToDeviceTask, myDeviceId, taskExecutor)
+        return VerificationTransportToDevice(tx, sendToDeviceTask, myDeviceId, taskExecutor, clock)
     }
 }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/AsyncTransaction.kt

@@ -24,6 +24,7 @@ import kotlinx.coroutines.isActive
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import timber.log.Timber
+import kotlin.system.measureTimeMillis
 
 internal fun <T> CoroutineScope.asyncTransaction(monarchy: Monarchy, transaction: suspend (realm: Realm) -> T) {
     asyncTransaction(monarchy.realmConfiguration, transaction)
@@ -41,13 +42,13 @@ internal suspend fun <T> awaitTransaction(config: RealmConfiguration, transactio
             bgRealm.beginTransaction()
             val result: T
             try {
-                val start = System.currentTimeMillis()
+                measureTimeMillis {
                     result = transaction(bgRealm)
                     if (isActive) {
                         bgRealm.commitTransaction()
-                    val end = System.currentTimeMillis()
+                    }
-                    val time = end - start
+                }.also {
-                    Timber.v("Execute transaction in $time millis")
+                    Timber.v("Execute transaction in $it millis")
                 }
             } finally {
                 if (bgRealm.isInTransaction) {

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/helper/ThreadSummaryHelper.kt

@@ -137,7 +137,8 @@ internal fun ThreadSummaryEntity.Companion.createOrUpdate(
         roomMemberContentsByUser: HashMap<String, RoomMemberContent?>,
         roomEntity: RoomEntity,
         userId: String,
-        cryptoService: CryptoService? = null
+        cryptoService: CryptoService? = null,
+        currentTimeMillis: Long,
 ) {
     when (threadSummaryType) {
         ThreadSummaryUpdateType.REPLACE -> {
@@ -153,14 +154,14 @@ internal fun ThreadSummaryEntity.Companion.createOrUpdate(
                 Timber.i("###THREADS ThreadSummaryHelper REPLACE eventId:${it.rootThreadEventId} ")
             }
 
-            val rootThreadEventEntity = createEventEntity(roomId, rootThreadEvent, realm).also {
+            val rootThreadEventEntity = createEventEntity(realm, roomId, rootThreadEvent, currentTimeMillis).also {
                 try {
                     decryptIfNeeded(cryptoService, it, roomId)
                 } catch (e: InterruptedException) {
                     Timber.i("Decryption got interrupted")
                 }
             }
-            val latestThreadEventEntity = createLatestEventEntity(roomId, rootThreadEvent, roomMemberContentsByUser, realm)?.also {
+            val latestThreadEventEntity = createLatestEventEntity(realm, roomId, rootThreadEvent, roomMemberContentsByUser, currentTimeMillis)?.also {
                 try {
                     decryptIfNeeded(cryptoService, it, roomId)
                 } catch (e: InterruptedException) {
@@ -268,8 +269,8 @@ private fun HashMap<String, RoomMemberContent?>.addSenderState(realm: Realm, roo
 /**
  * Create an EventEntity for the root thread event or get an existing one
  */
-private fun createEventEntity(roomId: String, event: Event, realm: Realm): EventEntity {
+private fun createEventEntity(realm: Realm, roomId: String, event: Event, currentTimeMillis: Long): EventEntity {
-    val ageLocalTs = event.unsignedData?.age?.let { System.currentTimeMillis() - it }
+    val ageLocalTs = event.unsignedData?.age?.let { currentTimeMillis - it }
     return event.toEntity(roomId, SendState.SYNCED, ageLocalTs).copyToRealmOrIgnore(realm, EventInsertType.PAGINATION)
 }
 
@@ -278,15 +279,17 @@ private fun createEventEntity(roomId: String, event: Event, realm: Realm): Event
  * state
  */
 private fun createLatestEventEntity(
+        realm: Realm,
         roomId: String,
         rootThreadEvent: Event,
         roomMemberContentsByUser: HashMap<String, RoomMemberContent?>,
-        realm: Realm): EventEntity? {
+        currentTimeMillis: Long,
+): EventEntity? {
     return getLatestEvent(rootThreadEvent)?.let {
         it.senderId?.let { senderId ->
             roomMemberContentsByUser.addSenderState(realm, roomId, senderId)
         }
-        createEventEntity(roomId, it, realm)
+        createEventEntity(realm, roomId, it, currentTimeMillis)
     }
 }
 

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/mapper/EventMapper.kt

@@ -30,13 +30,14 @@ import org.matrix.android.sdk.api.session.threads.ThreadNotificationState
 import org.matrix.android.sdk.internal.database.model.EventEntity
 import org.matrix.android.sdk.internal.di.MoshiProvider
 import timber.log.Timber
+import kotlin.random.Random
 
 internal object EventMapper {
 
     fun map(event: Event, roomId: String): EventEntity {
         val eventEntity = EventEntity()
         // TODO change this as we shouldn't use event everywhere
-        eventEntity.eventId = event.eventId ?: "$$roomId-${System.currentTimeMillis()}-${event.hashCode()}"
+        eventEntity.eventId = event.eventId ?: "$$roomId-${Random.nextLong()}-${event.hashCode()}"
         eventEntity.roomId = event.roomId ?: roomId
         eventEntity.content = ContentMapper.map(event.content)
         eventEntity.prevContent = ContentMapper.map(event.resolvedPrevContent())
@@ -126,7 +127,10 @@ internal fun EventEntity.asDomain(castJsonNumbers: Boolean = false): Event {
     return EventMapper.map(this, castJsonNumbers)
 }
 
-internal fun Event.toEntity(roomId: String, sendState: SendState, ageLocalTs: Long?, contentToInject: String? = null): EventEntity {
+internal fun Event.toEntity(roomId: String,
+                            sendState: SendState,
+                            ageLocalTs: Long?,
+                            contentToInject: String? = null): EventEntity {
     return EventMapper.map(this, roomId).apply {
         this.sendState = sendState
         this.ageLocalTs = ageLocalTs

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/DefaultFileService.kt

@@ -38,6 +38,7 @@ import org.matrix.android.sdk.internal.di.SessionDownloadsDirectory
 import org.matrix.android.sdk.internal.di.UnauthenticatedWithCertificateWithProgress
 import org.matrix.android.sdk.internal.session.download.DownloadProgressInterceptor.Companion.DOWNLOAD_PROGRESS_INTERCEPTOR_HEADER
 import org.matrix.android.sdk.internal.util.file.AtomicFileCreator
+import org.matrix.android.sdk.internal.util.time.Clock
 import org.matrix.android.sdk.internal.util.writeToFile
 import timber.log.Timber
 import java.io.File
@@ -51,7 +52,8 @@ internal class DefaultFileService @Inject constructor(
         private val contentUrlResolver: ContentUrlResolver,
         @UnauthenticatedWithCertificateWithProgress
         private val okHttpClient: OkHttpClient,
-        private val coroutineDispatchers: MatrixCoroutineDispatchers
+        private val coroutineDispatchers: MatrixCoroutineDispatchers,
+        private val clock: Clock,
 ) : FileService {
 
     // Legacy folder, will be deleted
@@ -182,7 +184,8 @@ internal class DefaultFileService @Inject constructor(
                             MXEncryptedAttachments.decryptAttachment(
                                     inputStream,
                                     elementToDecrypt,
-                                    outputStream
+                                    outputStream,
+                                    clock
                             )
                         }
                     }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/call/CallSignalingHandler.kt

@@ -34,6 +34,7 @@ import org.matrix.android.sdk.api.session.room.model.call.CallSelectAnswerConten
 import org.matrix.android.sdk.api.session.room.model.call.CallSignalingContent
 import org.matrix.android.sdk.internal.di.UserId
 import org.matrix.android.sdk.internal.session.SessionScope
+import org.matrix.android.sdk.internal.util.time.Clock
 import timber.log.Timber
 import javax.inject.Inject
 
@@ -41,9 +42,12 @@ private val loggerTag = LoggerTag("CallSignalingHandler", LoggerTag.VOIP)
 private const val MAX_AGE_TO_RING = 40_000
 
 @SessionScope
-internal class CallSignalingHandler @Inject constructor(private val activeCallHandler: ActiveCallHandler,
+internal class CallSignalingHandler @Inject constructor(
+        private val activeCallHandler: ActiveCallHandler,
         private val mxCallFactory: MxCallFactory,
-                                                        @UserId private val userId: String) {
+        @UserId private val userId: String,
+        private val clock: Clock,
+) {
 
     private val invitedCallIds = mutableSetOf<String>()
     private val callListeners = mutableSetOf<CallListener>()
@@ -184,7 +188,7 @@ internal class CallSignalingHandler @Inject constructor(private val activeCallHa
         if (event.roomId == null || event.senderId == null) {
             return
         }
-        val now = System.currentTimeMillis()
+        val now = clock.epochMillis()
         val age = now - (event.ageLocalTs ?: now)
         if (age > MAX_AGE_TO_RING) {
             Timber.tag(loggerTag.value).w("Call invite is too old to ring.")

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/call/MxCallFactory.kt

@@ -28,6 +28,7 @@ import org.matrix.android.sdk.internal.session.call.model.MxCallImpl
 import org.matrix.android.sdk.internal.session.profile.GetProfileInfoTask
 import org.matrix.android.sdk.internal.session.room.send.LocalEchoEventFactory
 import org.matrix.android.sdk.internal.session.room.send.queue.EventSenderProcessor
+import org.matrix.android.sdk.internal.util.time.Clock
 import javax.inject.Inject
 
 internal class MxCallFactory @Inject constructor(
@@ -36,7 +37,8 @@ internal class MxCallFactory @Inject constructor(
         private val eventSenderProcessor: EventSenderProcessor,
         private val matrixConfiguration: MatrixConfiguration,
         private val getProfileInfoTask: GetProfileInfoTask,
-        @UserId private val userId: String
+        @UserId private val userId: String,
+        private val clock: Clock,
 ) {
 
     fun createIncomingCall(roomId: String, opponentUserId: String, content: CallInviteContent): MxCall? {
@@ -51,7 +53,8 @@ internal class MxCallFactory @Inject constructor(
                 localEchoEventFactory = localEchoEventFactory,
                 eventSenderProcessor = eventSenderProcessor,
                 matrixConfiguration = matrixConfiguration,
-                getProfileInfoTask = getProfileInfoTask
+                getProfileInfoTask = getProfileInfoTask,
+                clock = clock,
         ).apply {
             updateOpponentData(opponentUserId, content, content.capabilities)
         }
@@ -68,7 +71,8 @@ internal class MxCallFactory @Inject constructor(
                 localEchoEventFactory = localEchoEventFactory,
                 eventSenderProcessor = eventSenderProcessor,
                 matrixConfiguration = matrixConfiguration,
-                getProfileInfoTask = getProfileInfoTask
+                getProfileInfoTask = getProfileInfoTask,
+                clock = clock,
         ).apply {
             // Setup with this userId, might be updated when processing the Answer event
             this.opponentUserId = opponentUserId

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/call/model/MxCallImpl.kt

@@ -46,6 +46,7 @@ import org.matrix.android.sdk.internal.session.call.DefaultCallSignalingService
 import org.matrix.android.sdk.internal.session.profile.GetProfileInfoTask
 import org.matrix.android.sdk.internal.session.room.send.LocalEchoEventFactory
 import org.matrix.android.sdk.internal.session.room.send.queue.EventSenderProcessor
+import org.matrix.android.sdk.internal.util.time.Clock
 import timber.log.Timber
 import java.math.BigDecimal
 
@@ -61,7 +62,8 @@ internal class MxCallImpl(
         private val localEchoEventFactory: LocalEchoEventFactory,
         private val eventSenderProcessor: EventSenderProcessor,
         private val matrixConfiguration: MatrixConfiguration,
-        private val getProfileInfoTask: GetProfileInfoTask
+        private val getProfileInfoTask: GetProfileInfoTask,
+        private val clock: Clock,
 ) : MxCall {
 
     override var opponentPartyId: Optional<String>? = null
@@ -250,7 +252,7 @@ internal class MxCallImpl(
     private fun createEventAndLocalEcho(localId: String = LocalEcho.createLocalEchoId(), type: String, roomId: String, content: Content): Event {
         return Event(
                 roomId = roomId,
-                originServerTs = System.currentTimeMillis(),
+                originServerTs = clock.epochMillis(),
                 senderId = userId,
                 eventId = localId,
                 type = type,

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/content/UploadContentWorker.kt

@@ -46,6 +46,7 @@ import org.matrix.android.sdk.internal.session.room.send.LocalEchoIdentifiers
 import org.matrix.android.sdk.internal.session.room.send.LocalEchoRepository
 import org.matrix.android.sdk.internal.session.room.send.MultipleEventSendingDispatcherWorker
 import org.matrix.android.sdk.internal.util.TemporaryFileCreator
+import org.matrix.android.sdk.internal.util.time.Clock
 import org.matrix.android.sdk.internal.util.toMatrixErrorStr
 import org.matrix.android.sdk.internal.worker.SessionSafeCoroutineWorker
 import org.matrix.android.sdk.internal.worker.SessionWorkerParams
@@ -87,6 +88,7 @@ internal class UploadContentWorker(val context: Context, params: WorkerParameter
     @Inject lateinit var thumbnailExtractor: ThumbnailExtractor
     @Inject lateinit var localEchoRepository: LocalEchoRepository
     @Inject lateinit var temporaryFileCreator: TemporaryFileCreator
+    @Inject lateinit var clock: Clock
 
     override fun injectWith(injector: SessionComponent) {
         injector.inject(this)
@@ -243,7 +245,7 @@ internal class UploadContentWorker(val context: Context, params: WorkerParameter
                             .also { filesToDelete.add(it) }
 
                     uploadedFileEncryptedFileInfo =
-                            MXEncryptedAttachments.encrypt(fileToUpload.inputStream(), encryptedFile) { read, total ->
+                            MXEncryptedAttachments.encrypt(fileToUpload.inputStream(), encryptedFile, clock) { read, total ->
                                 notifyTracker(params) {
                                     contentUploadStateTracker.setEncrypting(it, read.toLong(), total.toLong())
                                 }
@@ -329,7 +331,7 @@ internal class UploadContentWorker(val context: Context, params: WorkerParameter
                         if (params.isEncrypted) {
                             Timber.v("Encrypt thumbnail")
                             notifyTracker(params) { contentUploadStateTracker.setEncryptingThumbnail(it) }
-                            val encryptionResult = MXEncryptedAttachments.encryptAttachment(thumbnailData.bytes.inputStream())
+                            val encryptionResult = MXEncryptedAttachments.encryptAttachment(thumbnailData.bytes.inputStream(), clock)
                             val contentUploadResponse = fileUploader.uploadByteArray(
                                     byteArray = encryptionResult.encryptedByteArray,
                                     filename = null,

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/contentscanner/DefaultContentScannerService.kt

@@ -33,6 +33,7 @@ import org.matrix.android.sdk.internal.session.contentscanner.tasks.GetServerPub
 import org.matrix.android.sdk.internal.session.contentscanner.tasks.ScanEncryptedTask
 import org.matrix.android.sdk.internal.session.contentscanner.tasks.ScanMediaTask
 import org.matrix.android.sdk.internal.task.TaskExecutor
+import org.matrix.android.sdk.internal.util.time.Clock
 import timber.log.Timber
 import javax.inject.Inject
 
@@ -46,7 +47,8 @@ internal class DefaultContentScannerService @Inject constructor(
         private val getServerPublicKeyTask: GetServerPublicKeyTask,
         private val scanEncryptedTask: ScanEncryptedTask,
         private val scanMediaTask: ScanMediaTask,
-        private val taskExecutor: TaskExecutor
+        private val taskExecutor: TaskExecutor,
+        private val clock: Clock,
 ) : ContentScannerService {
 
     // Cache public key in memory
@@ -71,11 +73,13 @@ internal class DefaultContentScannerService @Inject constructor(
 
     override suspend fun getScanResultForAttachment(mxcUrl: String, fileInfo: ElementToDecrypt?): ScanStatusInfo {
         val result = if (fileInfo != null) {
-            scanEncryptedTask.execute(ScanEncryptedTask.Params(
+            scanEncryptedTask.execute(
+                    ScanEncryptedTask.Params(
                             mxcUrl = mxcUrl,
                             publicServerKey = getServerPublicKey(false),
                             encryptedInfo = fileInfo
-            ))
+                    )
+            )
         } else {
             scanMediaTask.execute(ScanMediaTask.Params(mxcUrl))
         }
@@ -83,7 +87,7 @@ internal class DefaultContentScannerService @Inject constructor(
         return ScanStatusInfo(
                 state = if (result.clean) ScanState.TRUSTED else ScanState.INFECTED,
                 humanReadableMessage = result.info,
-                scanDateTimestamp = System.currentTimeMillis()
+                scanDateTimestamp = clock.epochMillis()
         )
     }
 

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/contentscanner/db/ContentScannerEntityQueries.kt

@@ -31,11 +31,14 @@ internal fun ContentScanResultEntity.Companion.get(realm: Realm, attachmentUrl:
             .findFirst()
 }
 
-internal fun ContentScanResultEntity.Companion.getOrCreate(realm: Realm, attachmentUrl: String, contentScannerUrl: String?): ContentScanResultEntity {
+internal fun ContentScanResultEntity.Companion.getOrCreate(realm: Realm,
+                                                           attachmentUrl: String,
+                                                           contentScannerUrl: String?,
+                                                           currentTimeMillis: Long): ContentScanResultEntity {
     return ContentScanResultEntity.get(realm, attachmentUrl, contentScannerUrl)
             ?: realm.createObject<ContentScanResultEntity>().also {
                 it.mediaUrl = attachmentUrl
-                it.scanDateTimestamp = System.currentTimeMillis()
+                it.scanDateTimestamp = currentTimeMillis
                 it.scannerUrl = contentScannerUrl
             }
 }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/contentscanner/db/RealmContentScannerStore.kt

@@ -32,12 +32,14 @@ import org.matrix.android.sdk.internal.di.ContentScannerDatabase
 import org.matrix.android.sdk.internal.session.SessionScope
 import org.matrix.android.sdk.internal.session.contentscanner.data.ContentScannerStore
 import org.matrix.android.sdk.internal.util.isValidUrl
+import org.matrix.android.sdk.internal.util.time.Clock
 import javax.inject.Inject
 
 @SessionScope
 internal class RealmContentScannerStore @Inject constructor(
         @ContentScannerDatabase
-        private val realmConfiguration: RealmConfiguration
+        private val realmConfiguration: RealmConfiguration,
+        private val clock: Clock,
 ) : ContentScannerStore {
 
     private val monarchy = Monarchy.Builder()
@@ -82,15 +84,15 @@ internal class RealmContentScannerStore @Inject constructor(
 
     override fun updateStateForContent(mxcUrl: String, state: ScanState, scannerUrl: String?) {
         monarchy.runTransactionSync {
-            ContentScanResultEntity.getOrCreate(it, mxcUrl, scannerUrl).scanResult = state
+            ContentScanResultEntity.getOrCreate(it, mxcUrl, scannerUrl, clock.epochMillis()).scanResult = state
         }
     }
 
     override fun updateScanResultForContent(mxcUrl: String, scannerUrl: String?, state: ScanState, humanReadable: String) {
         monarchy.runTransactionSync {
-            ContentScanResultEntity.getOrCreate(it, mxcUrl, scannerUrl).apply {
+            ContentScanResultEntity.getOrCreate(it, mxcUrl, scannerUrl, clock.epochMillis()).apply {
                 scanResult = state
-                scanDateTimestamp = System.currentTimeMillis()
+                scanDateTimestamp = clock.epochMillis()
                 humanReadableMessage = humanReadable
             }
         }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/EventRelationsAggregationProcessor.kt

@@ -69,6 +69,7 @@ import org.matrix.android.sdk.internal.di.UserId
 import org.matrix.android.sdk.internal.session.EventInsertLiveProcessor
 import org.matrix.android.sdk.internal.session.room.aggregation.livelocation.LiveLocationAggregationProcessor
 import org.matrix.android.sdk.internal.session.room.state.StateEventDataSource
+import org.matrix.android.sdk.internal.util.time.Clock
 import timber.log.Timber
 import javax.inject.Inject
 
@@ -77,7 +78,8 @@ internal class EventRelationsAggregationProcessor @Inject constructor(
         private val stateEventDataSource: StateEventDataSource,
         @SessionId private val sessionId: String,
         private val sessionManager: SessionManager,
-        private val liveLocationAggregationProcessor: LiveLocationAggregationProcessor
+        private val liveLocationAggregationProcessor: LiveLocationAggregationProcessor,
+        private val clock: Clock,
 ) : EventInsertLiveProcessor {
 
     private val allowedTypes = listOf(
@@ -338,7 +340,7 @@ internal class EventRelationsAggregationProcessor @Inject constructor(
                 Timber.v("###REPLACE Receiving remote echo of edit (edit already done)")
                 existingSummary.editions.firstOrNull { it.eventId == txId }?.let {
                     it.eventId = event.eventId
-                    it.timestamp = event.originServerTs ?: System.currentTimeMillis()
+                    it.timestamp = event.originServerTs ?: clock.epochMillis()
                     it.isLocalEcho = false
                 }
             } else {
@@ -349,10 +351,10 @@ internal class EventRelationsAggregationProcessor @Inject constructor(
                                 eventId = event.eventId,
                                 content = ContentMapper.map(newContent),
                                 timestamp = if (isLocalEcho) {
-                                    System.currentTimeMillis()
+                                    clock.epochMillis()
                                 } else {
                                     // Do not take local echo originServerTs here, could mess up ordering (keep old ts)
-                                    event.originServerTs ?: System.currentTimeMillis()
+                                    event.originServerTs ?: clock.epochMillis()
                                 },
                                 isLocalEcho = isLocalEcho
                         )

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/create/CreateRoomTask.kt

@@ -41,6 +41,7 @@ import org.matrix.android.sdk.internal.session.user.accountdata.DirectChatsHelpe
 import org.matrix.android.sdk.internal.session.user.accountdata.UpdateUserAccountDataTask
 import org.matrix.android.sdk.internal.task.Task
 import org.matrix.android.sdk.internal.util.awaitTransaction
+import org.matrix.android.sdk.internal.util.time.Clock
 import java.util.concurrent.TimeUnit
 import javax.inject.Inject
 
@@ -56,7 +57,8 @@ internal class DefaultCreateRoomTask @Inject constructor(
         @SessionDatabase
         private val realmConfiguration: RealmConfiguration,
         private val createRoomBodyBuilder: CreateRoomBodyBuilder,
-        private val globalErrorReceiver: GlobalErrorReceiver
+        private val globalErrorReceiver: GlobalErrorReceiver,
+        private val clock: Clock,
 ) : CreateRoomTask {
 
     override suspend fun execute(params: CreateRoomParams): String {
@@ -106,7 +108,7 @@ internal class DefaultCreateRoomTask @Inject constructor(
         }
 
         awaitTransaction(realmConfiguration) {
-            RoomSummaryEntity.where(it, roomId).findFirst()?.lastActivityTime = System.currentTimeMillis()
+            RoomSummaryEntity.where(it, roomId).findFirst()?.lastActivityTime = clock.epochMillis()
         }
 
         if (otherUserId != null) {

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/membership/LoadRoomMembersTask.kt

@@ -42,6 +42,7 @@ import org.matrix.android.sdk.internal.session.room.summary.RoomSummaryUpdater
 import org.matrix.android.sdk.internal.session.sync.SyncTokenStore
 import org.matrix.android.sdk.internal.task.Task
 import org.matrix.android.sdk.internal.util.awaitTransaction
+import org.matrix.android.sdk.internal.util.time.Clock
 import java.util.concurrent.TimeUnit
 import javax.inject.Inject
 
@@ -61,7 +62,8 @@ internal class DefaultLoadRoomMembersTask @Inject constructor(
         private val roomMemberEventHandler: RoomMemberEventHandler,
         private val cryptoSessionInfoProvider: CryptoSessionInfoProvider,
         private val deviceListManager: DeviceListManager,
-        private val globalErrorReceiver: GlobalErrorReceiver
+        private val globalErrorReceiver: GlobalErrorReceiver,
+        private val clock: Clock,
 ) : LoadRoomMembersTask {
 
     override suspend fun execute(params: LoadRoomMembersTask.Params) {
@@ -107,7 +109,7 @@ internal class DefaultLoadRoomMembersTask @Inject constructor(
             // We ignore all the already known members
             val roomEntity = RoomEntity.where(realm, roomId).findFirst()
                     ?: realm.createObject(roomId)
-            val now = System.currentTimeMillis()
+            val now = clock.epochMillis()
             for (roomMemberEvent in response.roomMemberEvents) {
                 if (roomMemberEvent.eventId == null || roomMemberEvent.stateKey == null || roomMemberEvent.type == null) {
                     continue

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/membership/joining/JoinRoomTask.kt

@@ -35,6 +35,7 @@ import org.matrix.android.sdk.internal.session.room.RoomAPI
 import org.matrix.android.sdk.internal.session.room.membership.RoomChangeMembershipStateDataSource
 import org.matrix.android.sdk.internal.session.room.read.SetReadMarkersTask
 import org.matrix.android.sdk.internal.task.Task
+import org.matrix.android.sdk.internal.util.time.Clock
 import java.util.concurrent.TimeUnit
 import javax.inject.Inject
 
@@ -53,7 +54,8 @@ internal class DefaultJoinRoomTask @Inject constructor(
         @SessionDatabase
         private val realmConfiguration: RealmConfiguration,
         private val roomChangeMembershipStateDataSource: RoomChangeMembershipStateDataSource,
-        private val globalErrorReceiver: GlobalErrorReceiver
+        private val globalErrorReceiver: GlobalErrorReceiver,
+        private val clock: Clock,
 ) : JoinRoomTask {
 
     override suspend fun execute(params: JoinRoomTask.Params) {
@@ -90,7 +92,7 @@ internal class DefaultJoinRoomTask @Inject constructor(
             throw JoinRoomFailure.JoinedWithTimeout
         }
         awaitTransaction(realmConfiguration) {
-            RoomSummaryEntity.where(it, roomId).findFirst()?.lastActivityTime = System.currentTimeMillis()
+            RoomSummaryEntity.where(it, roomId).findFirst()?.lastActivityTime = clock.epochMillis()
         }
         setReadMarkers(roomId)
     }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/read/SetReadMarkersTask.kt

@@ -34,6 +34,7 @@ import org.matrix.android.sdk.internal.session.sync.handler.room.ReadReceiptHand
 import org.matrix.android.sdk.internal.session.sync.handler.room.RoomFullyReadHandler
 import org.matrix.android.sdk.internal.task.Task
 import org.matrix.android.sdk.internal.util.awaitTransaction
+import org.matrix.android.sdk.internal.util.time.Clock
 import timber.log.Timber
 import javax.inject.Inject
 import kotlin.collections.set
@@ -58,7 +59,8 @@ internal class DefaultSetReadMarkersTask @Inject constructor(
         private val roomFullyReadHandler: RoomFullyReadHandler,
         private val readReceiptHandler: ReadReceiptHandler,
         @UserId private val userId: String,
-        private val globalErrorReceiver: GlobalErrorReceiver
+        private val globalErrorReceiver: GlobalErrorReceiver,
+        private val clock: Clock,
 ) : SetReadMarkersTask {
 
     override suspend fun execute(params: SetReadMarkersTask.Params) {
@@ -125,7 +127,7 @@ internal class DefaultSetReadMarkersTask @Inject constructor(
                 roomFullyReadHandler.handle(realm, roomId, FullyReadContent(readMarkerId))
             }
             if (readReceiptId != null) {
-                val readReceiptContent = ReadReceiptHandler.createContent(userId, readReceiptId)
+                val readReceiptContent = ReadReceiptHandler.createContent(userId, readReceiptId, clock.epochMillis())
                 readReceiptHandler.handle(realm, roomId, readReceiptContent, false, null)
             }
             if (shouldUpdateRoomSummary) {

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/relation/EventEditor.kt

@@ -27,12 +27,16 @@ import org.matrix.android.sdk.internal.database.mapper.toEntity
 import org.matrix.android.sdk.internal.session.room.send.LocalEchoEventFactory
 import org.matrix.android.sdk.internal.session.room.send.LocalEchoRepository
 import org.matrix.android.sdk.internal.session.room.send.queue.EventSenderProcessor
+import org.matrix.android.sdk.internal.util.time.Clock
 import timber.log.Timber
 import javax.inject.Inject
 
-internal class EventEditor @Inject constructor(private val eventSenderProcessor: EventSenderProcessor,
+internal class EventEditor @Inject constructor(
+        private val eventSenderProcessor: EventSenderProcessor,
         private val eventFactory: LocalEchoEventFactory,
-                                               private val localEchoRepository: LocalEchoRepository) {
+        private val localEchoRepository: LocalEchoRepository,
+        private val clock: Clock,
+) {
 
     fun editTextMessage(targetEvent: TimelineEvent,
                         msgType: String,
@@ -126,7 +130,7 @@ internal class EventEditor @Inject constructor(private val eventSenderProcessor:
     }
 
     private fun updateFailedEchoWithEvent(roomId: String, failedEchoEventId: String, editedEvent: Event) {
-        val editedEventEntity = editedEvent.toEntity(roomId, SendState.UNSENT, System.currentTimeMillis())
+        val editedEventEntity = editedEvent.toEntity(roomId, SendState.UNSENT, clock.epochMillis())
         localEchoRepository.updateEchoAsync(failedEchoEventId) { _, entity ->
             entity.content = editedEventEntity.content
             entity.ageLocalTs = editedEventEntity.ageLocalTs

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/relation/threads/FetchThreadSummariesTask.kt

@@ -33,6 +33,7 @@ import org.matrix.android.sdk.internal.session.room.timeline.PaginationDirection
 import org.matrix.android.sdk.internal.session.room.timeline.PaginationResponse
 import org.matrix.android.sdk.internal.task.Task
 import org.matrix.android.sdk.internal.util.awaitTransaction
+import org.matrix.android.sdk.internal.util.time.Clock
 import timber.log.Timber
 import javax.inject.Inject
 
@@ -55,12 +56,14 @@ internal class DefaultFetchThreadSummariesTask @Inject constructor(
         @SessionDatabase private val monarchy: Monarchy,
         private val cryptoService: DefaultCryptoService,
         @UserId private val userId: String,
+        private val clock: Clock,
 ) : FetchThreadSummariesTask {
 
     override suspend fun execute(params: FetchThreadSummariesTask.Params): Result {
         val filter = FilterFactory.createThreadsFilter(
                 numberOfEvents = params.limit,
-                userId = if (params.isUserParticipating) userId else null).toJSONString()
+                userId = if (params.isUserParticipating) userId else null
+        ).toJSONString()
 
         val response = executeRequest(
                 globalErrorReceiver,
@@ -94,7 +97,9 @@ internal class DefaultFetchThreadSummariesTask @Inject constructor(
                         roomMemberContentsByUser = roomMemberContentsByUser,
                         roomEntity = roomEntity,
                         userId = userId,
-                        cryptoService = cryptoService)
+                        cryptoService = cryptoService,
+                        currentTimeMillis = clock.epochMillis(),
+                )
             }
         }
         return Result.SUCCESS

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/relation/threads/FetchThreadTimelineTask.kt

@@ -23,7 +23,6 @@ import org.matrix.android.sdk.api.session.events.model.Event
 import org.matrix.android.sdk.api.session.events.model.EventType
 import org.matrix.android.sdk.api.session.room.model.RoomMemberContent
 import org.matrix.android.sdk.api.session.room.send.SendState
-import org.matrix.android.sdk.internal.crypto.CryptoSessionInfoProvider
 import org.matrix.android.sdk.internal.crypto.DefaultCryptoService
 import org.matrix.android.sdk.internal.database.helper.addTimelineEvent
 import org.matrix.android.sdk.internal.database.mapper.asDomain
@@ -42,7 +41,6 @@ import org.matrix.android.sdk.internal.database.query.getOrCreate
 import org.matrix.android.sdk.internal.database.query.getOrNull
 import org.matrix.android.sdk.internal.database.query.where
 import org.matrix.android.sdk.internal.di.SessionDatabase
-import org.matrix.android.sdk.internal.di.UserId
 import org.matrix.android.sdk.internal.network.GlobalErrorReceiver
 import org.matrix.android.sdk.internal.network.executeRequest
 import org.matrix.android.sdk.internal.session.events.getFixedRoomMemberContent
@@ -51,6 +49,7 @@ import org.matrix.android.sdk.internal.session.room.relation.RelationsResponse
 import org.matrix.android.sdk.internal.session.room.timeline.PaginationDirection
 import org.matrix.android.sdk.internal.task.Task
 import org.matrix.android.sdk.internal.util.awaitTransaction
+import org.matrix.android.sdk.internal.util.time.Clock
 import timber.log.Timber
 import javax.inject.Inject
 
@@ -85,10 +84,9 @@ internal interface FetchThreadTimelineTask : Task<FetchThreadTimelineTask.Params
 internal class DefaultFetchThreadTimelineTask @Inject constructor(
         private val roomAPI: RoomAPI,
         private val globalErrorReceiver: GlobalErrorReceiver,
-        private val cryptoSessionInfoProvider: CryptoSessionInfoProvider,
         @SessionDatabase private val monarchy: Monarchy,
-        @UserId private val userId: String,
+        private val cryptoService: DefaultCryptoService,
-        private val cryptoService: DefaultCryptoService
+        private val clock: Clock,
 ) : FetchThreadTimelineTask {
 
     enum class Result {
@@ -156,7 +154,8 @@ internal class DefaultFetchThreadTimelineTask @Inject constructor(
                             eventEntity = eventEntity,
                             direction = PaginationDirection.FORWARDS,
                             ownedByThreadChunk = true,
-                            roomMemberContentsByUser = roomMemberContentsByUser)
+                            roomMemberContentsByUser = roomMemberContentsByUser
+                    )
                 }
             }
 
@@ -178,7 +177,8 @@ internal class DefaultFetchThreadTimelineTask @Inject constructor(
                             eventEntity = eventEntity,
                             direction = PaginationDirection.FORWARDS,
                             ownedByThreadChunk = true,
-                            roomMemberContentsByUser = roomMemberContentsByUser)
+                            roomMemberContentsByUser = roomMemberContentsByUser
+                    )
                 }
             }
         }
@@ -207,7 +207,7 @@ internal class DefaultFetchThreadTimelineTask @Inject constructor(
      * Create an EventEntity to be added in the TimelineEventEntity
      */
     private fun createEventEntity(roomId: String, event: Event, realm: Realm): EventEntity {
-        val ageLocalTs = event.unsignedData?.age?.let { System.currentTimeMillis() - it }
+        val ageLocalTs = event.unsignedData?.age?.let { clock.epochMillis() - it }
         return event.toEntity(roomId, SendState.SYNCED, ageLocalTs).copyToRealmOrIgnore(realm, EventInsertType.PAGINATION)
     }
 

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/send/LocalEchoEventFactory.kt

@@ -70,6 +70,7 @@ import org.matrix.android.sdk.internal.di.UserId
 import org.matrix.android.sdk.internal.session.content.ThumbnailExtractor
 import org.matrix.android.sdk.internal.session.permalinks.PermalinkFactory
 import org.matrix.android.sdk.internal.session.room.send.pills.TextPillsUtils
+import org.matrix.android.sdk.internal.util.time.Clock
 import java.util.UUID
 import javax.inject.Inject
 
@@ -90,7 +91,8 @@ internal class LocalEchoEventFactory @Inject constructor(
         private val thumbnailExtractor: ThumbnailExtractor,
         private val waveformSanitizer: WaveFormSanitizer,
         private val localEchoRepository: LocalEchoRepository,
-        private val permalinkFactory: PermalinkFactory
+        private val permalinkFactory: PermalinkFactory,
+        private val clock: Clock,
 ) {
     fun createTextEvent(roomId: String, msgType: String, text: CharSequence, autoMarkdown: Boolean): Event {
         if (msgType == MessageType.MSGTYPE_TEXT || msgType == MessageType.MSGTYPE_EMOTE) {
@@ -242,7 +244,7 @@ internal class LocalEchoEventFactory @Inject constructor(
                 body = geoUri,
                 unstableLocationInfo = LocationInfo(geoUri = geoUri, description = geoUri),
                 unstableLocationAsset = LocationAsset(type = assetType),
-                unstableTimestampMillis = System.currentTimeMillis(),
+                unstableTimestampMillis = clock.epochMillis(),
                 unstableText = geoUri
         )
         return createMessageEvent(roomId, content)
@@ -261,7 +263,7 @@ internal class LocalEchoEventFactory @Inject constructor(
                         eventId = beaconInfoEventId
                 ),
                 unstableLocationInfo = LocationInfo(geoUri = geoUri, description = geoUri),
-                unstableTimestampMillis = System.currentTimeMillis(),
+                unstableTimestampMillis = clock.epochMillis(),
         )
         val localId = LocalEcho.createLocalEchoId()
         return Event(
@@ -547,7 +549,7 @@ internal class LocalEchoEventFactory @Inject constructor(
     }
 
     private fun dummyOriginServerTs(): Long {
-        return System.currentTimeMillis()
+        return clock.epochMillis()
     }
 
     /**

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/send/LocalEchoRepository.kt

@@ -43,16 +43,20 @@ import org.matrix.android.sdk.internal.session.room.summary.RoomSummaryUpdater
 import org.matrix.android.sdk.internal.session.room.timeline.TimelineInput
 import org.matrix.android.sdk.internal.task.TaskExecutor
 import org.matrix.android.sdk.internal.util.awaitTransaction
+import org.matrix.android.sdk.internal.util.time.Clock
 import timber.log.Timber
 import java.util.UUID
 import javax.inject.Inject
 
-internal class LocalEchoRepository @Inject constructor(@SessionDatabase private val monarchy: Monarchy,
+internal class LocalEchoRepository @Inject constructor(
+        @SessionDatabase private val monarchy: Monarchy,
         private val taskExecutor: TaskExecutor,
         private val realmSessionProvider: RealmSessionProvider,
         private val roomSummaryUpdater: RoomSummaryUpdater,
         private val timelineInput: TimelineInput,
-                                                       private val timelineEventMapper: TimelineEventMapper) {
+        private val timelineEventMapper: TimelineEventMapper,
+        private val clock: Clock,
+) {
 
     fun createLocalEcho(event: Event) {
         val roomId = event.roomId ?: throw IllegalStateException("You should have set a roomId for your event")
@@ -61,7 +65,7 @@ internal class LocalEchoRepository @Inject constructor(@SessionDatabase private
         event.type ?: throw IllegalStateException("You should have set a type for your event")
 
         val timelineEventEntity = realmSessionProvider.withRealm { realm ->
-            val eventEntity = event.toEntity(roomId, SendState.UNSENT, System.currentTimeMillis())
+            val eventEntity = event.toEntity(roomId, SendState.UNSENT, clock.epochMillis())
             val roomMemberHelper = RoomMemberHelper(realm, roomId)
             val myUser = roomMemberHelper.getLastRoomMember(senderId)
             val localId = UUID.randomUUID().mostSignificantBits
@@ -88,7 +92,7 @@ internal class LocalEchoRepository @Inject constructor(@SessionDatabase private
     }
 
     fun updateSendState(eventId: String, roomId: String?, sendState: SendState, sendStateDetails: String? = null) {
-        Timber.v("## SendEvent: [${System.currentTimeMillis()}] Update local state of $eventId to ${sendState.name}")
+        Timber.v("## SendEvent: [${clock.epochMillis()}] Update local state of $eventId to ${sendState.name}")
         timelineInput.onLocalEchoUpdated(roomId = roomId ?: "", eventId = eventId, sendState = sendState)
         updateEchoAsync(eventId) { realm, sendingEventEntity ->
             if (sendState == SendState.SENT && sendingEventEntity.sendState == SendState.SYNCED) {

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/send/MultipleEventSendingDispatcherWorker.kt

@@ -77,7 +77,7 @@ internal class MultipleEventSendingDispatcherWorker(context: Context, params: Wo
             val roomId = localEchoIds.roomId
             val eventId = localEchoIds.eventId
             localEchoRepository.updateSendState(eventId, roomId, SendState.SENDING)
-            Timber.v("## SendEvent: [${System.currentTimeMillis()}] Schedule send event $eventId")
+            Timber.v("## SendEvent: Schedule send event $eventId")
             val sendWork = createSendEventWork(params.sessionId, eventId, true)
             timelineSendEventWorkCommon.postWork(roomId, sendWork)
         }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/send/SendEventWorker.kt

@@ -89,13 +89,13 @@ internal class SendEventWorker(context: Context, params: WorkerParameters, sessi
                     .also { Timber.e("Work cancelled due to input error from parent") }
         }
 
-        Timber.v("## SendEvent: [${System.currentTimeMillis()}] Send event ${params.eventId}")
+        Timber.v("## SendEvent: Send event ${params.eventId}")
         return try {
             sendEventTask.execute(SendEventTask.Params(event, params.isEncrypted ?: cryptoService.isRoomEncrypted(event.roomId)))
             Result.success()
         } catch (exception: Throwable) {
             if (/*currentAttemptCount >= MAX_NUMBER_OF_RETRY_BEFORE_FAILING ||**/ !exception.shouldBeRetried()) {
-                Timber.e("## SendEvent: [${System.currentTimeMillis()}]  Send event Failed cannot retry ${params.eventId} > ${exception.localizedMessage}")
+                Timber.e("## SendEvent: Send event Failed cannot retry ${params.eventId} > ${exception.localizedMessage}")
                 localEchoRepository.updateSendState(
                         eventId = event.eventId,
                         roomId = event.roomId,
@@ -104,7 +104,7 @@ internal class SendEventWorker(context: Context, params: WorkerParameters, sessi
                 )
                 Result.success()
             } else {
-                Timber.e("## SendEvent: [${System.currentTimeMillis()}]  Send event Failed schedule retry ${params.eventId} > ${exception.localizedMessage}")
+                Timber.e("## SendEvent: Send event Failed schedule retry ${params.eventId} > ${exception.localizedMessage}")
                 Result.retry()
             }
         }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/send/queue/EventSenderProcessorCoroutine.kt

@@ -191,7 +191,7 @@ internal class EventSenderProcessorCoroutine @Inject constructor(
 
     private suspend fun QueuedTask.waitForNetwork() = waitForNetworkSequencer.post {
         while (!canReachServer.get()) {
-            Timber.v("## $this cannot reach server wait ts:${System.currentTimeMillis()}")
+            Timber.v("## $this cannot reach server wait for $$RETRY_WAIT_TIME_MS ms")
             delay(RETRY_WAIT_TIME_MS)
             withContext(Dispatchers.IO) {
                 val hostAvailable = HomeServerAvailabilityChecker(sessionParams).check()

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/send/queue/EventSenderProcessorThread.kt

@@ -136,7 +136,7 @@ internal class EventSenderProcessorThread @Inject constructor(
     private var retryNoNetworkTask: TimerTask? = null
 
     override fun run() {
-        Timber.v("## SendThread started ts:${System.currentTimeMillis()}")
+        Timber.v("## SendThread started")
         try {
             while (!isInterrupted) {
                 Timber.v("## SendThread wait for task to process")
@@ -151,7 +151,7 @@ internal class EventSenderProcessorThread @Inject constructor(
                 }
                 // we check for network connectivity
                 while (!canReachServer) {
-                    Timber.v("## SendThread cannot reach server, wait ts:${System.currentTimeMillis()}")
+                    Timber.v("## SendThread cannot reach server")
                     // schedule to retry
                     waitForNetwork()
                     // if thread as been killed meanwhile
@@ -175,7 +175,7 @@ internal class EventSenderProcessorThread @Inject constructor(
                                     canReachServer = false
                                     if (task.retryCount.getAndIncrement() >= 3) task.onTaskFailed()
                                     while (!canReachServer) {
-                                        Timber.v("## SendThread retryLoop cannot reach server, wait ts:${System.currentTimeMillis()}")
+                                        Timber.v("## SendThread retryLoop cannot reach server")
                                         // schedule to retry
                                         waitForNetwork()
                                     }
@@ -218,7 +218,7 @@ internal class EventSenderProcessorThread @Inject constructor(
 //        state = State.KILLED
         // is this needed?
         retryNoNetworkTask?.cancel()
-        Timber.w("## SendThread finished ${System.currentTimeMillis()}")
+        Timber.w("## SendThread finished")
     }
 
     private fun waitForNetwork() {

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/timeline/DefaultTimeline.kt

@@ -43,19 +43,22 @@ import org.matrix.android.sdk.internal.session.sync.handler.room.ReadReceiptHand
 import org.matrix.android.sdk.internal.session.sync.handler.room.ThreadsAwarenessHandler
 import org.matrix.android.sdk.internal.task.SemaphoreCoroutineSequencer
 import org.matrix.android.sdk.internal.util.createBackgroundHandler
+import org.matrix.android.sdk.internal.util.time.Clock
 import timber.log.Timber
 import java.util.UUID
 import java.util.concurrent.CopyOnWriteArrayList
 import java.util.concurrent.atomic.AtomicBoolean
 import java.util.concurrent.atomic.AtomicReference
 
-internal class DefaultTimeline(private val roomId: String,
+internal class DefaultTimeline(
+        private val roomId: String,
         private val initialEventId: String?,
         private val realmConfiguration: RealmConfiguration,
         private val loadRoomMembersTask: LoadRoomMembersTask,
         private val readReceiptHandler: ReadReceiptHandler,
         private val settings: TimelineSettings,
         private val coroutineDispatchers: MatrixCoroutineDispatchers,
+        private val clock: Clock,
         paginationTask: PaginationTask,
         getEventTask: GetContextOfEventTask,
         fetchTokenAndPaginateTask: FetchTokenAndPaginateTask,
@@ -64,7 +67,8 @@ internal class DefaultTimeline(private val roomId: String,
         timelineInput: TimelineInput,
         threadsAwarenessHandler: ThreadsAwarenessHandler,
         lightweightSettingsStorage: LightweightSettingsStorage,
-                               eventDecryptor: TimelineEventDecryptor) : Timeline {
+        eventDecryptor: TimelineEventDecryptor,
+) : Timeline {
 
     companion object {
         val BACKGROUND_HANDLER = createBackgroundHandler("DefaultTimeline_Thread")
@@ -370,7 +374,8 @@ internal class DefaultTimeline(private val roomId: String,
                 roomId = roomId,
                 timelineId = timelineID,
                 mode = mode,
-                dependencies = strategyDependencies
+                dependencies = strategyDependencies,
+                clock = clock,
         )
     }
 

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/timeline/DefaultTimelineService.kt

@@ -34,6 +34,7 @@ import org.matrix.android.sdk.internal.session.room.membership.LoadRoomMembersTa
 import org.matrix.android.sdk.internal.session.room.relation.threads.FetchThreadTimelineTask
 import org.matrix.android.sdk.internal.session.sync.handler.room.ReadReceiptHandler
 import org.matrix.android.sdk.internal.session.sync.handler.room.ThreadsAwarenessHandler
+import org.matrix.android.sdk.internal.util.time.Clock
 
 internal class DefaultTimelineService @AssistedInject constructor(
         @Assisted private val roomId: String,
@@ -50,7 +51,8 @@ internal class DefaultTimelineService @AssistedInject constructor(
         private val lightweightSettingsStorage: LightweightSettingsStorage,
         private val readReceiptHandler: ReadReceiptHandler,
         private val coroutineDispatchers: MatrixCoroutineDispatchers,
-        private val timelineEventDataSource: TimelineEventDataSource
+        private val timelineEventDataSource: TimelineEventDataSource,
+        private val clock: Clock,
         ) : TimelineService {
 
     @AssistedFactory
@@ -75,7 +77,8 @@ internal class DefaultTimelineService @AssistedInject constructor(
                 readReceiptHandler = readReceiptHandler,
                 getEventTask = contextOfEventTask,
                 threadsAwarenessHandler = threadsAwarenessHandler,
-                lightweightSettingsStorage = lightweightSettingsStorage
+                lightweightSettingsStorage = lightweightSettingsStorage,
+                clock = clock
         )
     }
 

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/timeline/GetEventTask.kt

@@ -24,6 +24,7 @@ import org.matrix.android.sdk.internal.network.GlobalErrorReceiver
 import org.matrix.android.sdk.internal.network.executeRequest
 import org.matrix.android.sdk.internal.session.room.RoomAPI
 import org.matrix.android.sdk.internal.task.Task
+import org.matrix.android.sdk.internal.util.time.Clock
 import javax.inject.Inject
 
 internal interface GetEventTask : Task<GetEventTask.Params, Event> {
@@ -36,7 +37,8 @@ internal interface GetEventTask : Task<GetEventTask.Params, Event> {
 internal class DefaultGetEventTask @Inject constructor(
         private val roomAPI: RoomAPI,
         private val globalErrorReceiver: GlobalErrorReceiver,
-        private val eventDecryptor: EventDecryptor
+        private val eventDecryptor: EventDecryptor,
+        private val clock: Clock,
 ) : GetEventTask {
 
     override suspend fun execute(params: GetEventTask.Params): Event {
@@ -59,7 +61,7 @@ internal class DefaultGetEventTask @Inject constructor(
                     }
         }
 
-        event.ageLocalTs = event.unsignedData?.age?.let { System.currentTimeMillis() - it }
+        event.ageLocalTs = event.unsignedData?.age?.let { clock.epochMillis() - it }
 
         return event
     }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/timeline/LoadTimelineStrategy.kt

@@ -42,6 +42,7 @@ import org.matrix.android.sdk.internal.database.query.findLastForwardChunkOfThre
 import org.matrix.android.sdk.internal.database.query.where
 import org.matrix.android.sdk.internal.session.room.relation.threads.FetchThreadTimelineTask
 import org.matrix.android.sdk.internal.session.sync.handler.room.ThreadsAwarenessHandler
+import org.matrix.android.sdk.internal.util.time.Clock
 import timber.log.Timber
 import java.util.concurrent.atomic.AtomicReference
 
@@ -53,11 +54,13 @@ import java.util.concurrent.atomic.AtomicReference
  * Once we got a ChunkEntity we wrap it with TimelineChunk class so we dispatch any methods for loading data.
  */
 
-internal class LoadTimelineStrategy(
+internal class LoadTimelineStrategy constructor(
         private val roomId: String,
         private val timelineId: String,
         private val mode: Mode,
-        private val dependencies: Dependencies) {
+        private val dependencies: Dependencies,
+        clock: Clock,
+) {
 
     sealed interface Mode {
         object Live : Mode
@@ -153,7 +156,7 @@ internal class LoadTimelineStrategy(
         }
     }
 
-    private val uiEchoManager = UIEchoManager(uiEchoManagerListener)
+    private val uiEchoManager = UIEchoManager(uiEchoManagerListener, clock)
     private val sendingEventsDataSource: SendingEventsDataSource = RealmSendingEventsDataSource(
             roomId = roomId,
             realm = dependencies.realm,

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/timeline/TokenChunkEventPersistor.kt

@@ -44,6 +44,7 @@ import org.matrix.android.sdk.internal.di.SessionDatabase
 import org.matrix.android.sdk.internal.di.UserId
 import org.matrix.android.sdk.internal.session.StreamEventsManager
 import org.matrix.android.sdk.internal.util.awaitTransaction
+import org.matrix.android.sdk.internal.util.time.Clock
 import timber.log.Timber
 import javax.inject.Inject
 
@@ -54,7 +55,9 @@ internal class TokenChunkEventPersistor @Inject constructor(
         @SessionDatabase private val monarchy: Monarchy,
         @UserId private val userId: String,
         private val lightweightSettingsStorage: LightweightSettingsStorage,
-        private val liveEventManager: Lazy<StreamEventsManager>) {
+        private val liveEventManager: Lazy<StreamEventsManager>,
+        private val clock: Clock,
+) {
 
     enum class Result {
         SHOULD_FETCH_MORE,
@@ -166,7 +169,7 @@ internal class TokenChunkEventPersistor @Inject constructor(
         val eventList = receivedChunk.events
         val stateEvents = receivedChunk.stateEvents
 
-        val now = System.currentTimeMillis()
+        val now = clock.epochMillis()
 
         stateEvents?.forEach { stateEvent ->
             val ageLocalTs = stateEvent.unsignedData?.age?.let { now - it }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/timeline/UIEchoManager.kt

@@ -24,10 +24,14 @@ import org.matrix.android.sdk.api.session.room.model.ReactionAggregatedSummary
 import org.matrix.android.sdk.api.session.room.model.relation.ReactionContent
 import org.matrix.android.sdk.api.session.room.send.SendState
 import org.matrix.android.sdk.api.session.room.timeline.TimelineEvent
+import org.matrix.android.sdk.internal.util.time.Clock
 import timber.log.Timber
 import java.util.Collections
 
-internal class UIEchoManager(private val listener: Listener) {
+internal class UIEchoManager(
+        private val listener: Listener,
+        private val clock: Clock,
+) {
 
     interface Listener {
         fun rebuildEvent(eventId: String, builder: (TimelineEvent) -> TimelineEvent?): Boolean
@@ -109,7 +113,7 @@ internal class UIEchoManager(private val listener: Listener) {
                         key = uiEchoReaction.reaction,
                         count = 1,
                         addedByMe = true,
-                        firstTimestamp = System.currentTimeMillis(),
+                        firstTimestamp = clock.epochMillis(),
                         sourceEvents = emptyList(),
                         localEchoEvents = listOf(uiEchoReaction.localEchoId)
                 ).let { updateReactions.add(it) }
@@ -143,7 +147,7 @@ internal class UIEchoManager(private val listener: Listener) {
     fun updateSentStateWithUiEcho(timelineEvent: TimelineEvent): TimelineEvent {
         if (timelineEvent.root.sendState.isSent()) return timelineEvent
         val inMemoryState = inMemorySendingStates[timelineEvent.eventId] ?: return timelineEvent
-        // Timber.v("## ${System.currentTimeMillis()} Send event refresh echo with live state $inMemoryState from state ${element.root.sendState}")
+        // Timber.v("## ${clock.epochMillis()} Send event refresh echo with live state $inMemoryState from state ${element.root.sendState}")
         return timelineEvent.copy(
                 root = timelineEvent.root.copyAll()
                         .also { it.sendState = inMemoryState }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/sync/InitialSyncStatusRepository.kt

@@ -20,6 +20,7 @@ import com.squareup.moshi.JsonClass
 import okio.buffer
 import okio.source
 import org.matrix.android.sdk.internal.di.MoshiProvider
+import org.matrix.android.sdk.internal.util.time.Clock
 import timber.log.Timber
 import java.io.File
 
@@ -46,7 +47,10 @@ internal interface InitialSyncStatusRepository {
 /**
  * This class handle the current status of an initial sync and persist it on the disk, to be robust against crash
  */
-internal class FileInitialSyncStatusRepository(directory: File) : InitialSyncStatusRepository {
+internal class FileInitialSyncStatusRepository(
+        directory: File,
+        private val clock: Clock,
+) : InitialSyncStatusRepository {
 
     companion object {
         // After 2 hours, we consider that the downloaded file is outdated:
@@ -64,7 +68,7 @@ internal class FileInitialSyncStatusRepository(directory: File) : InitialSyncSta
         ensureCache()
         val state = cache?.step ?: InitialSyncStatus.STEP_INIT
         return if (state >= InitialSyncStatus.STEP_DOWNLOADED &&
-                System.currentTimeMillis() > (cache?.downloadedDate ?: 0) + INIT_SYNC_FILE_LIFETIME) {
+                clock.epochMillis() > (cache?.downloadedDate ?: 0) + INIT_SYNC_FILE_LIFETIME) {
             Timber.d("INIT_SYNC downloaded file is outdated, download it again")
             // The downloaded file is outdated
             setStep(InitialSyncStatus.STEP_INIT)
@@ -79,7 +83,7 @@ internal class FileInitialSyncStatusRepository(directory: File) : InitialSyncSta
         if (step == InitialSyncStatus.STEP_DOWNLOADED) {
             // Also store the downloaded date
             newStatus = newStatus.copy(
-                    downloadedDate = System.currentTimeMillis()
+                    downloadedDate = clock.epochMillis()
             )
         }
         cache = newStatus

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/sync/SyncTask.kt

@@ -44,6 +44,7 @@ import org.matrix.android.sdk.internal.session.sync.parsing.InitialSyncResponseP
 import org.matrix.android.sdk.internal.session.user.UserStore
 import org.matrix.android.sdk.internal.task.Task
 import org.matrix.android.sdk.internal.util.logDuration
+import org.matrix.android.sdk.internal.util.time.Clock
 import retrofit2.Response
 import retrofit2.awaitResponse
 import timber.log.Timber
@@ -78,11 +79,12 @@ internal class DefaultSyncTask @Inject constructor(
         @SessionFilesDirectory
         private val fileDirectory: File,
         private val syncResponseParser: InitialSyncResponseParser,
-        private val roomSyncEphemeralTemporaryStore: RoomSyncEphemeralTemporaryStore
+        private val roomSyncEphemeralTemporaryStore: RoomSyncEphemeralTemporaryStore,
+        private val clock: Clock,
 ) : SyncTask {
 
     private val workingDir = File(fileDirectory, "is")
-    private val initialSyncStatusRepository: InitialSyncStatusRepository = FileInitialSyncStatusRepository(workingDir)
+    private val initialSyncStatusRepository: InitialSyncStatusRepository = FileInitialSyncStatusRepository(workingDir, clock)
 
     override suspend fun execute(params: SyncTask.Params): SyncResponse {
         return syncTaskSequencer.post {
@@ -111,7 +113,8 @@ internal class DefaultSyncTask @Inject constructor(
             userStore.createOrUpdate(
                     userId = userId,
                     displayName = user?.displayName,
-                    avatarUrl = user?.avatarUrl)
+                    avatarUrl = user?.avatarUrl
+            )
             defaultSyncStatusService.startRoot(InitSyncStep.ImportingAccount, 100)
         }
         // Maybe refresh the homeserver capabilities data we know
@@ -124,7 +127,7 @@ internal class DefaultSyncTask @Inject constructor(
         if (isInitialSync) {
             Timber.tag(loggerTag.value).d("INIT_SYNC with filter: ${requestParams["filter"]}")
             val initSyncStrategy = initialSyncStrategy
-            logDuration("INIT_SYNC strategy: $initSyncStrategy", loggerTag) {
+            logDuration("INIT_SYNC strategy: $initSyncStrategy", loggerTag, clock) {
                 if (initSyncStrategy is InitialSyncStrategy.Optimized) {
                     roomSyncEphemeralTemporaryStore.reset()
                     workingDir.mkdirs()
@@ -135,7 +138,7 @@ internal class DefaultSyncTask @Inject constructor(
                     // Delete all files
                     workingDir.deleteRecursively()
                 } else {
-                    val syncResponse = logDuration("INIT_SYNC Request", loggerTag) {
+                    val syncResponse = logDuration("INIT_SYNC Request", loggerTag, clock) {
                         executeRequest(globalErrorReceiver) {
                             syncAPI.sync(
                                     params = requestParams,
@@ -146,7 +149,7 @@ internal class DefaultSyncTask @Inject constructor(
                     // We cannot distinguish request and download in this case.
                     syncStatisticsData.requestInitSyncTime = SystemClock.elapsedRealtime()
                     syncStatisticsData.downloadInitSyncTime = syncStatisticsData.requestInitSyncTime
-                    logDuration("INIT_SYNC Database insertion", loggerTag) {
+                    logDuration("INIT_SYNC Database insertion", loggerTag, clock) {
                         syncResponseHandler.handleResponse(syncResponse, token, defaultSyncStatusService)
                     }
                     syncResponseToReturn = syncResponse
@@ -174,10 +177,12 @@ internal class DefaultSyncTask @Inject constructor(
             Timber.tag(loggerTag.value).d(
                     "Incremental sync request parsing, $nbRooms room(s) $nbToDevice toDevice(s). Got nextBatch: $nextBatch"
             )
-            defaultSyncStatusService.setStatus(SyncStatusService.Status.IncrementalSyncParsing(
+            defaultSyncStatusService.setStatus(
+                    SyncStatusService.Status.IncrementalSyncParsing(
                             rooms = nbRooms,
                             toDevice = nbToDevice
-            ))
+                    )
+            )
             syncResponseHandler.handleResponse(syncResponse, token, null)
             syncResponseToReturn = syncResponse
             Timber.tag(loggerTag.value).d("Incremental sync done")
@@ -201,14 +206,14 @@ internal class DefaultSyncTask @Inject constructor(
             }
         } else {
             initialSyncStatusRepository.setStep(InitialSyncStatus.STEP_DOWNLOADING)
-            val syncResponse = logDuration("INIT_SYNC Perform server request", loggerTag) {
+            val syncResponse = logDuration("INIT_SYNC Perform server request", loggerTag, clock) {
                 reportSubtask(defaultSyncStatusService, InitSyncStep.ServerComputing, 1, 0.2f) {
                     getSyncResponse(requestParams, MAX_NUMBER_OF_RETRY_AFTER_TIMEOUT)
                 }
             }
             syncStatisticsData.requestInitSyncTime = SystemClock.elapsedRealtime()
             if (syncResponse.isSuccessful) {
-                logDuration("INIT_SYNC Download and save to file", loggerTag) {
+                logDuration("INIT_SYNC Download and save to file", loggerTag, clock) {
                     reportSubtask(defaultSyncStatusService, InitSyncStep.Downloading, 1, 0.1f) {
                         syncResponse.body()?.byteStream()?.use { inputStream ->
                             workingFile.outputStream().use { outputStream ->
@@ -247,8 +252,8 @@ internal class DefaultSyncTask @Inject constructor(
     }
 
     private suspend fun handleSyncFile(workingFile: File, initSyncStrategy: InitialSyncStrategy.Optimized): SyncResponse {
-        return logDuration("INIT_SYNC handleSyncFile()", loggerTag) {
+        return logDuration("INIT_SYNC handleSyncFile()", loggerTag, clock) {
-            val syncResponse = logDuration("INIT_SYNC Read file and parse", loggerTag) {
+            val syncResponse = logDuration("INIT_SYNC Read file and parse", loggerTag, clock) {
                 syncResponseParser.parse(initSyncStrategy, workingFile)
             }
             initialSyncStatusRepository.setStep(InitialSyncStatus.STEP_PARSED)
@@ -257,7 +262,7 @@ internal class DefaultSyncTask @Inject constructor(
             val nbOfJoinedRoomsInFile = syncResponse.rooms?.join?.values?.count { it.ephemeral is LazyRoomSyncEphemeral.Stored }
             Timber.tag(loggerTag.value).d("INIT_SYNC $nbOfJoinedRooms rooms, $nbOfJoinedRoomsInFile ephemeral stored into files")
 
-            logDuration("INIT_SYNC Database insertion", loggerTag) {
+            logDuration("INIT_SYNC Database insertion", loggerTag, clock) {
                 syncResponseHandler.handleResponse(syncResponse, null, defaultSyncStatusService)
             }
             initialSyncStatusRepository.setStep(InitialSyncStatus.STEP_SUCCESS)

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/sync/handler/room/ReadReceiptHandler.kt

@@ -44,12 +44,14 @@ internal class ReadReceiptHandler @Inject constructor(
 
     companion object {
 
-        fun createContent(userId: String, eventId: String): ReadReceiptContent {
+        fun createContent(userId: String,
+                          eventId: String,
+                          currentTimeMillis: Long): ReadReceiptContent {
             return mapOf(
                     eventId to mapOf(
                             READ_KEY to mapOf(
                                     userId to mapOf(
-                                            TIMESTAMP_KEY to System.currentTimeMillis().toDouble()
+                                            TIMESTAMP_KEY to currentTimeMillis.toDouble()
                                     )
                             )
                     )

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/sync/handler/room/RoomSyncHandler.kt

@@ -79,10 +79,12 @@ import org.matrix.android.sdk.internal.session.room.typing.TypingEventContent
 import org.matrix.android.sdk.internal.session.sync.SyncResponsePostTreatmentAggregator
 import org.matrix.android.sdk.internal.session.sync.parsing.RoomSyncAccountDataHandler
 import org.matrix.android.sdk.internal.util.computeBestChunkSize
+import org.matrix.android.sdk.internal.util.time.Clock
 import timber.log.Timber
 import javax.inject.Inject
 
-internal class RoomSyncHandler @Inject constructor(private val readReceiptHandler: ReadReceiptHandler,
+internal class RoomSyncHandler @Inject constructor(
+        private val readReceiptHandler: ReadReceiptHandler,
         private val roomSummaryUpdater: RoomSummaryUpdater,
         private val roomAccountDataHandler: RoomSyncAccountDataHandler,
         private val cryptoService: DefaultCryptoService,
@@ -94,7 +96,9 @@ internal class RoomSyncHandler @Inject constructor(private val readReceiptHandle
         private val homeServerCapabilitiesService: HomeServerCapabilitiesService,
         private val lightweightSettingsStorage: LightweightSettingsStorage,
         private val timelineInput: TimelineInput,
-                                                   private val liveEventService: Lazy<StreamEventsManager>) {
+        private val liveEventService: Lazy<StreamEventsManager>,
+        private val clock: Clock,
+) {
 
     sealed class HandlingStrategy {
         data class JOINED(val data: Map<String, RoomSync>) : HandlingStrategy()
@@ -130,7 +134,7 @@ internal class RoomSyncHandler @Inject constructor(private val readReceiptHandle
         } else {
             EventInsertType.INCREMENTAL_SYNC
         }
-        val syncLocalTimeStampMillis = System.currentTimeMillis()
+        val syncLocalTimeStampMillis = clock.epochMillis()
         val rooms = when (handlingStrategy) {
             is HandlingStrategy.JOINED  -> {
                 if (isInitialSync && initialSyncStrategy is InitialSyncStrategy.Optimized) {
@@ -440,7 +444,8 @@ internal class RoomSyncHandler @Inject constructor(private val readReceiptHandle
                                 threadEventEntity = eventEntity,
                                 roomMemberContentsByUser = roomMemberContentsByUser,
                                 userId = userId,
-                                roomEntity = roomEntity
+                                roomEntity = roomEntity,
+                                currentTimeMillis = clock.epochMillis(),
                         )
                     }
                 } ?: run {

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/util/LogUtil.kt

@@ -18,6 +18,7 @@ package org.matrix.android.sdk.internal.util
 
 import org.matrix.android.sdk.BuildConfig
 import org.matrix.android.sdk.api.logger.LoggerTag
+import org.matrix.android.sdk.internal.util.time.Clock
 import timber.log.Timber
 
 internal fun <T> Collection<T>.logLimit(maxQuantity: Int = 5): String {
@@ -34,13 +35,14 @@ internal fun <T> Collection<T>.logLimit(maxQuantity: Int = 5): String {
 
 internal suspend fun <T> logDuration(message: String,
                                      loggerTag: LoggerTag,
+                                     clock: Clock,
                                      block: suspend () -> T): T {
     Timber.tag(loggerTag.value).d("$message -- BEGIN")
-    val start = System.currentTimeMillis()
+    val start = clock.epochMillis()
     val result = logRamUsage(message) {
         block()
     }
-    val duration = System.currentTimeMillis() - start
+    val duration = clock.epochMillis() - start
     Timber.tag(loggerTag.value).d("$message -- END duration: $duration ms")
 
     return result

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/util/system/SystemModule.kt

@@ -18,10 +18,15 @@ package org.matrix.android.sdk.internal.util.system
 
 import dagger.Binds
 import dagger.Module
+import org.matrix.android.sdk.internal.util.time.Clock
+import org.matrix.android.sdk.internal.util.time.DefaultClock
 
 @Module
 internal abstract class SystemModule {
 
     @Binds
     abstract fun bindBuildVersionSdkIntProvider(provider: DefaultBuildVersionSdkIntProvider): BuildVersionSdkIntProvider
+
+    @Binds
+    abstract fun bindClock(clock: DefaultClock): Clock
 }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/util/time/Clock.kt

@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2022 The Matrix.org Foundation C.I.C.
+ *
+ * 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 org.matrix.android.sdk.internal.util.time
+
+import javax.inject.Inject
+
+internal interface Clock {
+    fun epochMillis(): Long
+}
+
+internal class DefaultClock @Inject constructor() : Clock {
+
+    /**
+     * Provides a UTC epoch in milliseconds
+     *
+     * This value is not guaranteed to be correct with reality
+     * as a User can override the system time and date to any values.
+     */
+    override fun epochMillis(): Long {
+        return System.currentTimeMillis()
+    }
+}

tools/check/forbidden_strings_in_code.txt

@@ -174,3 +174,6 @@ PreferenceManager\.getDefaultSharedPreferences==2
 
 ### Do not use `template_` string. Please remove the prefix `template_` to use the generated resource instead.
 R\.string\.template_
+
+### Use the Clock interface, or use `measureTimeMillis`
+System\.currentTimeMillis\(\)===2

vector/src/androidTest/java/im/vector/app/EspressoExt.kt

@@ -43,6 +43,7 @@ import com.google.android.material.bottomsheet.BottomSheetBehavior
 import com.google.android.material.bottomsheet.BottomSheetDialog
 import com.google.android.material.bottomsheet.BottomSheetDialogFragment
 import im.vector.app.core.platform.VectorBaseBottomSheetDialogFragment
+import im.vector.app.core.time.DefaultClock
 import im.vector.app.espresso.tools.waitUntilViewVisible
 import org.hamcrest.Matcher
 import org.hamcrest.Matchers
@@ -52,6 +53,7 @@ import org.matrix.android.sdk.api.session.crypto.crosssigning.PrivateKeysInfo
 import org.matrix.android.sdk.api.session.sync.SyncState
 import org.matrix.android.sdk.api.util.Optional
 import java.util.concurrent.TimeoutException
+import kotlin.random.Random
 
 object EspressoHelper {
     fun getCurrentActivity(): Activity? {
@@ -89,6 +91,8 @@ fun getString(@StringRes id: Int): String {
 
 fun waitForView(viewMatcher: Matcher<View>, timeout: Long = 10_000, waitForDisplayed: Boolean = true): ViewAction {
     return object : ViewAction {
+        private val clock = DefaultClock()
+
         override fun getConstraints(): Matcher<View> {
             return Matchers.any(View::class.java)
         }
@@ -102,14 +106,14 @@ fun waitForView(viewMatcher: Matcher<View>, timeout: Long = 10_000, waitForDispl
         override fun perform(uiController: UiController, view: View) {
             println("*** waitForView 1 $view")
             uiController.loopMainThreadUntilIdle()
-            val startTime = System.currentTimeMillis()
+            val startTime = clock.epochMillis()
             val endTime = startTime + timeout
             val visibleMatcher = isDisplayed()
 
             uiController.loopMainThreadForAtLeast(100)
 
             do {
-                println("*** waitForView loop $view end:$endTime current:${System.currentTimeMillis()}")
+                println("*** waitForView loop $view end:$endTime current:${clock.epochMillis()}")
                 val viewVisible = TreeIterables.breadthFirstViewTraversal(view)
                         .any { viewMatcher.matches(it) && visibleMatcher.matches(it) }
 
@@ -118,7 +122,7 @@ fun waitForView(viewMatcher: Matcher<View>, timeout: Long = 10_000, waitForDispl
                 println("*** waitForView loop loopMainThreadForAtLeast...")
                 uiController.loopMainThreadForAtLeast(50)
                 println("*** waitForView loop ...loopMainThreadForAtLeast")
-            } while (System.currentTimeMillis() < endTime)
+            } while (clock.epochMillis() < endTime)
 
             println("*** waitForView timeout $view")
             // Timeout happens.
@@ -168,9 +172,9 @@ fun activityIdlingResource(activityClass: Class<*>): IdlingResource {
     val res = object : IdlingResource, ActivityLifecycleCallback {
         private var callback: IdlingResource.ResourceCallback? = null
         private var resumedActivity: Activity? = null
-        private val uniqTS = System.currentTimeMillis()
+        private val uniqueSuffix = Random.nextLong()
 
-        override fun getName() = "activityIdlingResource_${activityClass.name}_$uniqTS"
+        override fun getName() = "activityIdlingResource_${activityClass.name}_$uniqueSuffix"
 
         override fun isIdleNow(): Boolean {
             val activity = resumedActivity ?: ActivityLifecycleMonitorRegistry.getInstance().getActivitiesInStage(Stage.RESUMED).firstOrNull {

vector/src/androidTest/java/im/vector/app/RegistrationTest.kt

@@ -34,6 +34,7 @@ import org.hamcrest.CoreMatchers.not
 import org.junit.Rule
 import org.junit.Test
 import org.junit.runner.RunWith
+import kotlin.random.Random
 
 @RunWith(AndroidJUnit4::class)
 @LargeTest
@@ -44,7 +45,7 @@ class RegistrationTest {
 
     @Test
     fun simpleRegister() {
-        val userId: String = "UiAutoTest_${System.currentTimeMillis()}"
+        val userId: String = "UiAutoTest_${Random.nextLong()}"
         val password: String = "password"
         val homeServerUrl: String = "http://10.0.2.2:8080"
 

vector/src/androidTest/java/im/vector/app/SecurityBootstrapTest.kt

@@ -48,6 +48,7 @@ import org.junit.Rule
 import org.junit.Test
 import org.junit.runner.RunWith
 import org.matrix.android.sdk.api.session.Session
+import kotlin.random.Random
 
 @RunWith(AndroidJUnit4::class)
 @LargeTest
@@ -61,7 +62,7 @@ class SecurityBootstrapTest : VerificationTestBase() {
     @Before
     fun createSessionWithCrossSigning() {
         val matrix = getMatrixInstance()
-        val userName = "foobar_${System.currentTimeMillis()}"
+        val userName = "foobar_${Random.nextLong()}"
         existingSession = createAccountAndSync(matrix, userName, password, true)
         stubAllExternalIntents()
     }

vector/src/androidTest/java/im/vector/app/VerifySessionInteractiveTest.kt

@@ -53,6 +53,7 @@ import org.matrix.android.sdk.api.session.crypto.verification.VerificationTransa
 import org.matrix.android.sdk.api.session.crypto.verification.VerificationTxState
 import kotlin.coroutines.Continuation
 import kotlin.coroutines.resume
+import kotlin.random.Random
 
 @RunWith(AndroidJUnit4::class)
 @LargeTest
@@ -66,7 +67,7 @@ class VerifySessionInteractiveTest : VerificationTestBase() {
     @Before
     fun createSessionWithCrossSigning() {
         val matrix = getMatrixInstance()
-        val userName = "foobar_${System.currentTimeMillis()}"
+        val userName = "foobar_${Random.nextLong()}"
         existingSession = createAccountAndSync(matrix, userName, password, true)
         doSync<Unit> {
             existingSession!!.cryptoService().crossSigningService()

vector/src/androidTest/java/im/vector/app/VerifySessionPassphraseTest.kt

@@ -53,6 +53,7 @@ import org.matrix.android.sdk.api.auth.registration.RegistrationFlowResponse
 import org.matrix.android.sdk.api.session.Session
 import kotlin.coroutines.Continuation
 import kotlin.coroutines.resume
+import kotlin.random.Random
 
 @RunWith(AndroidJUnit4::class)
 @LargeTest
@@ -68,7 +69,7 @@ class VerifySessionPassphraseTest : VerificationTestBase() {
     fun createSessionWithCrossSigningAnd4S() {
         val context = InstrumentationRegistry.getInstrumentation().targetContext
         val matrix = getMatrixInstance()
-        val userName = "foobar_${System.currentTimeMillis()}"
+        val userName = "foobar_${Random.nextLong()}"
         existingSession = createAccountAndSync(matrix, userName, password, true)
         doSync<Unit> {
             existingSession!!.cryptoService().crossSigningService()

vector/src/androidTest/java/im/vector/app/espresso/tools/ScreenshotFailureRule.kt

@@ -24,6 +24,7 @@ import android.os.Build
 import android.os.Environment
 import android.provider.MediaStore
 import androidx.test.platform.app.InstrumentationRegistry.getInstrumentation
+import im.vector.app.core.time.DefaultClock
 import org.junit.rules.TestWatcher
 import org.junit.runner.Description
 import timber.log.Timber
@@ -54,7 +55,7 @@ private fun storeFailureScreenshot(bitmap: Bitmap, screenshotName: String) {
 
     val contentValues = ContentValues().apply {
         put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg")
-        put(MediaStore.Images.Media.DATE_TAKEN, System.currentTimeMillis())
+        put(MediaStore.Images.Media.DATE_TAKEN, DefaultClock().epochMillis())
     }
     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
         useMediaStoreScreenshotStorage(

vector/src/debug/java/im/vector/app/features/debug/DebugMenuActivity.kt

@@ -29,6 +29,7 @@ import im.vector.app.R
 import im.vector.app.core.di.ActiveSessionHolder
 import im.vector.app.core.extensions.registerStartForActivityResult
 import im.vector.app.core.platform.VectorBaseActivity
+import im.vector.app.core.time.Clock
 import im.vector.app.core.utils.PERMISSIONS_FOR_TAKING_PHOTO
 import im.vector.app.core.utils.checkPermissions
 import im.vector.app.core.utils.registerForPermissionsResult
@@ -59,6 +60,8 @@ class DebugMenuActivity : VectorBaseActivity<ActivityDebugMenuBinding>() {
 
     @Inject
     lateinit var activeSessionHolder: ActiveSessionHolder
+    @Inject
+    lateinit var clock: Clock
 
     private lateinit var buffer: ByteArray
 
@@ -165,7 +168,7 @@ class DebugMenuActivity : VectorBaseActivity<ActivityDebugMenuBinding>() {
         }
 
         val builder = NotificationCompat.Builder(this, "CHAN")
-                .setWhen(System.currentTimeMillis())
+                .setWhen(clock.epochMillis())
                 .setContentTitle("Title")
                 .setContentText("Content")
                 // No effect because it's a group summary notif
@@ -180,16 +183,16 @@ class DebugMenuActivity : VectorBaseActivity<ActivityDebugMenuBinding>() {
                         .setName("User name")
                         .build()
         )
-                .addMessage("Message 1 - 1", System.currentTimeMillis(), Person.Builder().setName("user 1-1").build())
+                .addMessage("Message 1 - 1", clock.epochMillis(), Person.Builder().setName("user 1-1").build())
-                .addMessage("Message 1 - 2", System.currentTimeMillis(), Person.Builder().setName("user 1-2").build())
+                .addMessage("Message 1 - 2", clock.epochMillis(), Person.Builder().setName("user 1-2").build())
 
         val messagingStyle2 = NotificationCompat.MessagingStyle(
                 Person.Builder()
                         .setName("User name 2")
                         .build()
         )
-                .addMessage("Message 2 - 1", System.currentTimeMillis(), Person.Builder().setName("user 1-1").build())
+                .addMessage("Message 2 - 1", clock.epochMillis(), Person.Builder().setName("user 1-1").build())
-                .addMessage("Message 2 - 2", System.currentTimeMillis(), Person.Builder().setName("user 1-2").build())
+                .addMessage("Message 2 - 2", clock.epochMillis(), Person.Builder().setName("user 1-2").build())
 
         notificationManager.notify(10, builder.build())
 
@@ -197,7 +200,7 @@ class DebugMenuActivity : VectorBaseActivity<ActivityDebugMenuBinding>() {
                 11,
                 NotificationCompat.Builder(this, "CHAN")
                         .setChannelId("CHAN")
-                        .setWhen(System.currentTimeMillis())
+                        .setWhen(clock.epochMillis())
                         .setContentTitle("Title 1")
                         .setContentText("Content 1")
                         // For shortcut on long press on launcher icon
@@ -211,7 +214,7 @@ class DebugMenuActivity : VectorBaseActivity<ActivityDebugMenuBinding>() {
         notificationManager.notify(
                 12,
                 NotificationCompat.Builder(this, "CHAN2")
-                        .setWhen(System.currentTimeMillis())
+                        .setWhen(clock.epochMillis())
                         .setContentTitle("Title 2")
                         .setContentText("Content 2")
                         .setStyle(messagingStyle2)

vector/src/fdroid/java/im/vector/app/fdroid/BackgroundSyncStarter.kt

@@ -18,13 +18,17 @@ package im.vector.app.fdroid
 
 import android.content.Context
 import im.vector.app.core.di.ActiveSessionHolder
+import im.vector.app.core.time.Clock
 import im.vector.app.fdroid.receiver.AlarmSyncBroadcastReceiver
 import im.vector.app.features.settings.BackgroundSyncMode
 import im.vector.app.features.settings.VectorPreferences
 import timber.log.Timber
 
 object BackgroundSyncStarter {
-    fun start(context: Context, vectorPreferences: VectorPreferences, activeSessionHolder: ActiveSessionHolder) {
+    fun start(context: Context,
+              vectorPreferences: VectorPreferences,
+              activeSessionHolder: ActiveSessionHolder,
+              clock: Clock) {
         if (vectorPreferences.areNotificationEnabledForDevice()) {
             val activeSession = activeSessionHolder.getSafeActiveSession() ?: return
             when (vectorPreferences.getFdroidSyncBackgroundMode()) {
@@ -38,7 +42,12 @@ object BackgroundSyncStarter {
                 }
                 BackgroundSyncMode.FDROID_BACKGROUND_SYNC_MODE_FOR_REALTIME -> {
                     // We need to use alarm in this mode
-                    AlarmSyncBroadcastReceiver.scheduleAlarm(context, activeSession.sessionId, vectorPreferences.backgroundSyncDelay())
+                    AlarmSyncBroadcastReceiver.scheduleAlarm(
+                            context,
+                            activeSession.sessionId,
+                            vectorPreferences.backgroundSyncDelay(),
+                            clock
+                    )
                     Timber.i("## Sync: Alarm scheduled to start syncing")
                 }
                 BackgroundSyncMode.FDROID_BACKGROUND_SYNC_MODE_DISABLED     -> {

vector/src/fdroid/java/im/vector/app/fdroid/receiver/AlarmSyncBroadcastReceiver.kt

@@ -27,6 +27,7 @@ import androidx.core.content.getSystemService
 import im.vector.app.core.extensions.singletonEntryPoint
 import im.vector.app.core.platform.PendingIntentCompat
 import im.vector.app.core.services.VectorSyncService
+import im.vector.app.core.time.Clock
 import org.matrix.android.sdk.api.session.sync.job.SyncService
 import timber.log.Timber
 
@@ -34,10 +35,13 @@ class AlarmSyncBroadcastReceiver : BroadcastReceiver() {
 
     override fun onReceive(context: Context, intent: Intent) {
         Timber.d("## Sync: AlarmSyncBroadcastReceiver received intent")
-        val vectorPreferences = context.singletonEntryPoint()
+        val singletonEntryPoint = context.singletonEntryPoint()
-                .takeIf { it.activeSessionHolder().getSafeActiveSession() != null }
+        if (singletonEntryPoint.activeSessionHolder().getSafeActiveSession() == null) {
-                ?.vectorPreferences()
+            Timber.v("No active session, so don't launch sync service.")
-                ?: return Unit.also { Timber.v("No active session, so don't launch sync service.") }
+            return
+        }
+        val vectorPreferences = singletonEntryPoint.vectorPreferences()
+        val clock = singletonEntryPoint.clock()
 
         val sessionId = intent.getStringExtra(SyncService.EXTRA_SESSION_ID) ?: return
         VectorSyncService.newPeriodicIntent(
@@ -52,7 +56,7 @@ class AlarmSyncBroadcastReceiver : BroadcastReceiver() {
                         ContextCompat.startForegroundService(context, it)
                     } catch (ex: Throwable) {
                         Timber.i("## Sync: Failed to start service, Alarm scheduled to restart service")
-                        scheduleAlarm(context, sessionId, vectorPreferences.backgroundSyncDelay())
+                        scheduleAlarm(context, sessionId, vectorPreferences.backgroundSyncDelay(), clock)
                         Timber.e(ex)
                     }
                 }
@@ -61,7 +65,7 @@ class AlarmSyncBroadcastReceiver : BroadcastReceiver() {
     companion object {
         private const val REQUEST_CODE = 0
 
-        fun scheduleAlarm(context: Context, sessionId: String, delayInSeconds: Int) {
+        fun scheduleAlarm(context: Context, sessionId: String, delayInSeconds: Int, clock: Clock) {
             // Reschedule
             Timber.v("## Sync: Scheduling alarm for background sync in $delayInSeconds seconds")
             val intent = Intent(context, AlarmSyncBroadcastReceiver::class.java).apply {
@@ -74,7 +78,7 @@ class AlarmSyncBroadcastReceiver : BroadcastReceiver() {
                     intent,
                     PendingIntent.FLAG_UPDATE_CURRENT or PendingIntentCompat.FLAG_IMMUTABLE
             )
-            val firstMillis = System.currentTimeMillis() + delayInSeconds * 1000L
+            val firstMillis = clock.epochMillis() + delayInSeconds * 1000L
             val alarmMgr = context.getSystemService<AlarmManager>()!!
             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                 alarmMgr.setAndAllowWhileIdle(AlarmManager.RTC_WAKEUP, firstMillis, pIntent)

vector/src/fdroid/java/im/vector/app/fdroid/receiver/OnApplicationUpgradeOrRebootReceiver.kt

@@ -32,7 +32,8 @@ class OnApplicationUpgradeOrRebootReceiver : BroadcastReceiver() {
         BackgroundSyncStarter.start(
                 context,
                 singletonEntryPoint.vectorPreferences(),
-                singletonEntryPoint.activeSessionHolder()
+                singletonEntryPoint.activeSessionHolder(),
+                singletonEntryPoint.clock()
         )
     }
 }

vector/src/fdroid/java/im/vector/app/push/fcm/FcmHelper.kt

@@ -21,6 +21,7 @@ import android.app.Activity
 import android.content.Context
 import im.vector.app.core.di.ActiveSessionHolder
 import im.vector.app.core.pushers.PushersManager
+import im.vector.app.core.time.Clock
 import im.vector.app.fdroid.BackgroundSyncStarter
 import im.vector.app.fdroid.receiver.AlarmSyncBroadcastReceiver
 import im.vector.app.features.settings.VectorPreferences
@@ -66,7 +67,10 @@ object FcmHelper {
         AlarmSyncBroadcastReceiver.cancelAlarm(context)
     }
 
-    fun onEnterBackground(context: Context, vectorPreferences: VectorPreferences, activeSessionHolder: ActiveSessionHolder) {
+    fun onEnterBackground(context: Context,
-        BackgroundSyncStarter.start(context, vectorPreferences, activeSessionHolder)
+                          vectorPreferences: VectorPreferences,
+                          activeSessionHolder: ActiveSessionHolder,
+                          clock: Clock) {
+        BackgroundSyncStarter.start(context, vectorPreferences, activeSessionHolder, clock)
     }
 }

vector/src/gplay/java/im/vector/app/push/fcm/FcmHelper.kt

@@ -26,6 +26,7 @@ import im.vector.app.R
 import im.vector.app.core.di.ActiveSessionHolder
 import im.vector.app.core.di.DefaultSharedPreferences
 import im.vector.app.core.pushers.PushersManager
+import im.vector.app.core.time.Clock
 import im.vector.app.features.settings.VectorPreferences
 import timber.log.Timber
 
@@ -107,7 +108,10 @@ object FcmHelper {
     }
 
     @Suppress("UNUSED_PARAMETER")
-    fun onEnterBackground(context: Context, vectorPreferences: VectorPreferences, activeSessionHolder: ActiveSessionHolder) {
+    fun onEnterBackground(context: Context,
+                          vectorPreferences: VectorPreferences,
+                          activeSessionHolder: ActiveSessionHolder,
+                          clock: Clock) {
         // No op
     }
 }

vector/src/main/java/im/vector/app/VectorApplication.kt

@@ -43,6 +43,7 @@ import dagger.hilt.android.HiltAndroidApp
 import im.vector.app.core.di.ActiveSessionHolder
 import im.vector.app.core.extensions.configureAndStart
 import im.vector.app.core.extensions.startSyncing
+import im.vector.app.core.time.Clock
 import im.vector.app.features.analytics.VectorAnalytics
 import im.vector.app.features.call.webrtc.WebRtcCallManager
 import im.vector.app.features.configuration.VectorConfiguration
@@ -85,6 +86,7 @@ class VectorApplication :
     @Inject lateinit var emojiCompatWrapper: EmojiCompatWrapper
     @Inject lateinit var vectorUncaughtExceptionHandler: VectorUncaughtExceptionHandler
     @Inject lateinit var activeSessionHolder: ActiveSessionHolder
+    @Inject lateinit var clock: Clock
     @Inject lateinit var notificationDrawerManager: NotificationDrawerManager
     @Inject lateinit var vectorPreferences: VectorPreferences
     @Inject lateinit var versionProvider: VersionProvider
@@ -180,7 +182,7 @@ class VectorApplication :
 
             override fun onPause(owner: LifecycleOwner) {
                 Timber.i("App entered background")
-                FcmHelper.onEnterBackground(appContext, vectorPreferences, activeSessionHolder)
+                FcmHelper.onEnterBackground(appContext, vectorPreferences, activeSessionHolder, clock)
             }
         })
         ProcessLifecycleOwner.get().lifecycle.addObserver(appStateHandler)

vector/src/main/java/im/vector/app/core/date/VectorDateFormatter.kt

@@ -22,15 +22,19 @@ import android.text.format.DateUtils
 import im.vector.app.core.resources.DateProvider
 import im.vector.app.core.resources.LocaleProvider
 import im.vector.app.core.resources.toTimestamp
+import im.vector.app.core.time.Clock
 import org.threeten.bp.LocalDateTime
 import org.threeten.bp.Period
 import org.threeten.bp.format.DateTimeFormatter
 import javax.inject.Inject
 import kotlin.math.absoluteValue
 
-class VectorDateFormatter @Inject constructor(private val context: Context,
+class VectorDateFormatter @Inject constructor(
+        private val context: Context,
         private val localeProvider: LocaleProvider,
-                                              private val dateFormatterProviders: DateFormatterProviders) {
+        private val dateFormatterProviders: DateFormatterProviders,
+        private val clock: Clock,
+) {
 
     private val hourFormatter by lazy {
         if (DateFormat.is24HourFormat(context)) {
@@ -158,8 +162,9 @@ class VectorDateFormatter @Inject constructor(private val context: Context,
     private fun getRelativeDay(ts: Long): String {
         return DateUtils.getRelativeTimeSpanString(
                 ts,
-                System.currentTimeMillis(),
+                clock.epochMillis(),
                 DateUtils.DAY_IN_MILLIS,
-                DateUtils.FORMAT_SHOW_WEEKDAY).toString()
+                DateUtils.FORMAT_SHOW_WEEKDAY
+        ).toString()
     }
 }

vector/src/main/java/im/vector/app/core/di/SingletonEntryPoint.kt

@@ -21,6 +21,7 @@ import dagger.hilt.InstallIn
 import dagger.hilt.components.SingletonComponent
 import im.vector.app.core.dialogs.UnrecognizedCertificateDialog
 import im.vector.app.core.error.ErrorFormatter
+import im.vector.app.core.time.Clock
 import im.vector.app.features.analytics.AnalyticsTracker
 import im.vector.app.features.call.webrtc.WebRtcCallManager
 import im.vector.app.features.home.AvatarRenderer
@@ -46,6 +47,8 @@ interface SingletonEntryPoint {
 
     fun navigator(): Navigator
 
+    fun clock(): Clock
+
     fun errorFormatter(): ErrorFormatter
 
     fun bugReporter(): BugReporter

vector/src/main/java/im/vector/app/core/dialogs/GalleryOrCameraDialogHelper.kt

@@ -27,6 +27,7 @@ import im.vector.app.core.dialogs.GalleryOrCameraDialogHelper.Listener
 import im.vector.app.core.extensions.insertBeforeLast
 import im.vector.app.core.extensions.registerStartForActivityResult
 import im.vector.app.core.resources.ColorProvider
+import im.vector.app.core.time.Clock
 import im.vector.app.core.utils.PERMISSIONS_FOR_TAKING_PHOTO
 import im.vector.app.core.utils.checkPermissions
 import im.vector.app.core.utils.onPermissionDeniedDialog
@@ -45,7 +46,8 @@ import java.io.File
 class GalleryOrCameraDialogHelper(
         // must implement GalleryOrCameraDialogHelper.Listener
         private val fragment: Fragment,
-        private val colorProvider: ColorProvider
+        private val colorProvider: ColorProvider,
+        private val clock: Clock,
 ) {
     interface Listener {
         fun onImageReady(uri: Uri?)
@@ -91,7 +93,7 @@ class GalleryOrCameraDialogHelper(
     }
 
     private fun startUCrop(image: MultiPickerImageType) {
-        val destinationFile = File(activity.cacheDir, image.displayName.insertBeforeLast("_e_${System.currentTimeMillis()}"))
+        val destinationFile = File(activity.cacheDir, image.displayName.insertBeforeLast("_e_${clock.epochMillis()}"))
         val uri = image.contentUri
         createUCropWithDefaultSettings(colorProvider, uri, destinationFile.toUri(), fragment.getString(R.string.rotate_and_crop_screen_title))
                 .withAspectRatio(1f, 1f)

vector/src/main/java/im/vector/app/core/services/VectorSyncService.kt

@@ -33,6 +33,8 @@ import androidx.work.WorkerParameters
 import dagger.hilt.android.AndroidEntryPoint
 import im.vector.app.R
 import im.vector.app.core.platform.PendingIntentCompat
+import im.vector.app.core.time.Clock
+import im.vector.app.core.time.DefaultClock
 import im.vector.app.features.notifications.NotificationUtils
 import im.vector.app.features.settings.BackgroundSyncMode
 import org.matrix.android.sdk.api.Matrix
@@ -77,6 +79,7 @@ class VectorSyncService : SyncService() {
 
     @Inject lateinit var notificationUtils: NotificationUtils
     @Inject lateinit var matrix: Matrix
+    @Inject lateinit var clock: Clock
 
     override fun provideMatrix() = matrix
 
@@ -102,7 +105,8 @@ class VectorSyncService : SyncService() {
                 syncTimeoutSeconds = syncTimeoutSeconds,
                 syncDelaySeconds = syncDelaySeconds,
                 isPeriodic = true,
-                isNetworkBack = false
+                isNetworkBack = false,
+                currentTimeMillis = clock.epochMillis()
         )
     }
 
@@ -114,7 +118,8 @@ class VectorSyncService : SyncService() {
         val rescheduleSyncWorkRequest: WorkRequest =
                 OneTimeWorkRequestBuilder<RestartWhenNetworkOn>()
                         .setInputData(RestartWhenNetworkOn.createInputData(sessionId, syncTimeoutSeconds, syncDelaySeconds, isPeriodic))
-                        .setConstraints(Constraints.Builder()
+                        .setConstraints(
+                                Constraints.Builder()
                                         .setRequiredNetworkType(NetworkType.CONNECTED)
                                         .build()
                         )
@@ -137,20 +142,27 @@ class VectorSyncService : SyncService() {
     }
 
     // I do not move or rename this class, since I'm not sure about the side effect regarding the WorkManager
-    class RestartWhenNetworkOn(appContext: Context, workerParams: WorkerParameters) :
+    class RestartWhenNetworkOn(
-            Worker(appContext, workerParams) {
+            appContext: Context,
+            workerParams: WorkerParameters
+    ) : Worker(appContext, workerParams) {
+
         override fun doWork(): Result {
             Timber.d("## Sync: RestartWhenNetworkOn.doWork()")
             val sessionId = inputData.getString(KEY_SESSION_ID) ?: return Result.failure()
             val syncTimeoutSeconds = inputData.getInt(KEY_SYNC_TIMEOUT_SECONDS, BackgroundSyncMode.DEFAULT_SYNC_TIMEOUT_SECONDS)
             val syncDelaySeconds = inputData.getInt(KEY_SYNC_DELAY_SECONDS, BackgroundSyncMode.DEFAULT_SYNC_DELAY_SECONDS)
             val isPeriodic = inputData.getBoolean(KEY_IS_PERIODIC, false)
+
+            // Not sure how to inject a Clock here
+            val clock = DefaultClock()
             applicationContext.rescheduleSyncService(
                     sessionId = sessionId,
                     syncTimeoutSeconds = syncTimeoutSeconds,
                     syncDelaySeconds = syncDelaySeconds,
                     isPeriodic = isPeriodic,
-                    isNetworkBack = true
+                    isNetworkBack = true,
+                    currentTimeMillis = clock.epochMillis()
             )
             // Indicate whether the work finished successfully with the Result
             return Result.success()
@@ -182,7 +194,8 @@ private fun Context.rescheduleSyncService(sessionId: String,
                                           syncTimeoutSeconds: Int,
                                           syncDelaySeconds: Int,
                                           isPeriodic: Boolean,
-                                          isNetworkBack: Boolean) {
+                                          isNetworkBack: Boolean,
+                                          currentTimeMillis: Long) {
     Timber.d("## Sync: rescheduleSyncService")
     val intent = if (isPeriodic) {
         VectorSyncService.newPeriodicIntent(
@@ -208,7 +221,7 @@ private fun Context.rescheduleSyncService(sessionId: String,
         } else {
             PendingIntent.getService(this, 0, intent, PendingIntentCompat.FLAG_IMMUTABLE)
         }
-        val firstMillis = System.currentTimeMillis() + syncDelaySeconds * 1000L
+        val firstMillis = currentTimeMillis + syncDelaySeconds * 1000L
         val alarmMgr = getSystemService<AlarmManager>()!!
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
             alarmMgr.setAndAllowWhileIdle(AlarmManager.RTC_WAKEUP, firstMillis, pendingIntent)

vector/src/main/java/im/vector/app/core/utils/ExternalApplicationsUtil.kt

@@ -147,8 +147,11 @@ fun openFileSelection(activity: Activity,
  * Send an email to address with optional subject and message
  */
 fun sendMailTo(address: String, subject: String? = null, message: String? = null, activity: Activity) {
-    val intent = Intent(Intent.ACTION_SENDTO, Uri.fromParts(
+    val intent = Intent(
-            "mailto", address, null))
+            Intent.ACTION_SENDTO, Uri.fromParts(
+            "mailto", address, null
+    )
+    )
     intent.putExtra(Intent.EXTRA_SUBJECT, subject)
     intent.putExtra(Intent.EXTRA_TEXT, message)
 
@@ -248,7 +251,12 @@ private fun appendTimeToFilename(name: String): String {
     return """${filename}_$dateExtension.$fileExtension"""
 }
 
-suspend fun saveMedia(context: Context, file: File, title: String, mediaMimeType: String?, notificationUtils: NotificationUtils) {
+suspend fun saveMedia(context: Context,
+                      file: File,
+                      title: String,
+                      mediaMimeType: String?,
+                      notificationUtils: NotificationUtils,
+                      currentTimeMillis: Long) {
     withContext(Dispatchers.IO) {
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
             val filename = appendTimeToFilename(title)
@@ -257,8 +265,8 @@ suspend fun saveMedia(context: Context, file: File, title: String, mediaMimeType
                 put(MediaStore.Images.Media.TITLE, filename)
                 put(MediaStore.Images.Media.DISPLAY_NAME, filename)
                 put(MediaStore.Images.Media.MIME_TYPE, mediaMimeType)
-                put(MediaStore.Images.Media.DATE_ADDED, System.currentTimeMillis())
+                put(MediaStore.Images.Media.DATE_ADDED, currentTimeMillis)
-                put(MediaStore.Images.Media.DATE_TAKEN, System.currentTimeMillis())
+                put(MediaStore.Images.Media.DATE_TAKEN, currentTimeMillis)
             }
             val externalContentUri = when {
                 mediaMimeType?.isMimeTypeImage() == true -> MediaStore.Images.Media.EXTERNAL_CONTENT_URI
@@ -289,7 +297,7 @@ suspend fun saveMedia(context: Context, file: File, title: String, mediaMimeType
                 }
             }
         } else {
-            saveMediaLegacy(context, mediaMimeType, title, file)
+            saveMediaLegacy(context, mediaMimeType, title, file, currentTimeMillis)
         }
     }
 }
@@ -298,7 +306,8 @@ suspend fun saveMedia(context: Context, file: File, title: String, mediaMimeType
 private fun saveMediaLegacy(context: Context,
                             mediaMimeType: String?,
                             title: String,
-                            file: File) {
+                            file: File,
+                            currentTimeMillis: Long) {
     val state = Environment.getExternalStorageState()
     if (Environment.MEDIA_MOUNTED != state) {
         context.toast(context.getString(R.string.error_saving_media_file))
@@ -319,7 +328,7 @@ private fun saveMediaLegacy(context: Context,
         } else {
             title
         }
-        val savedFile = saveFileIntoLegacy(file, downloadDir, outputFilename)
+        val savedFile = saveFileIntoLegacy(file, downloadDir, outputFilename, currentTimeMillis)
         if (savedFile != null) {
             val downloadManager = context.getSystemService<DownloadManager>()
             downloadManager?.addCompletedDownload(
@@ -329,7 +338,8 @@ private fun saveMediaLegacy(context: Context,
                     mediaMimeType ?: MimeTypes.OctetStream,
                     savedFile.absolutePath,
                     savedFile.length(),
-                    true)
+                    true
+            )
             addToGallery(savedFile, mediaMimeType, context)
         }
     } catch (error: Throwable) {
@@ -408,10 +418,11 @@ fun selectTxtFileToWrite(
  * @param sourceFile     the file source path
  * @param dstDirPath     the dst path
  * @param outputFilename optional the output filename
+ * @param currentTimeMillis the current time in milliseconds
  * @return               the created file
  */
 @Suppress("DEPRECATION")
-fun saveFileIntoLegacy(sourceFile: File, dstDirPath: File, outputFilename: String?): File? {
+fun saveFileIntoLegacy(sourceFile: File, dstDirPath: File, outputFilename: String?, currentTimeMillis: Long): File? {
     // defines another name for the external media
     var dstFileName: String
 
@@ -423,7 +434,7 @@ fun saveFileIntoLegacy(sourceFile: File, dstDirPath: File, outputFilename: Strin
         if (dotPos > 0) {
             fileExt = sourceFile.name.substring(dotPos)
         }
-        dstFileName = "vector_" + System.currentTimeMillis() + fileExt
+        dstFileName = "vector_$currentTimeMillis$fileExt"
     } else {
         dstFileName = outputFilename
     }

vector/src/main/java/im/vector/app/features/attachments/preview/AttachmentsPreviewFragment.kt

@@ -45,6 +45,7 @@ import im.vector.app.core.extensions.insertBeforeLast
 import im.vector.app.core.extensions.registerStartForActivityResult
 import im.vector.app.core.platform.VectorBaseFragment
 import im.vector.app.core.resources.ColorProvider
+import im.vector.app.core.time.Clock
 import im.vector.app.core.utils.OnSnapPositionChangeListener
 import im.vector.app.core.utils.SnapOnScrollListener
 import im.vector.app.core.utils.attachSnapHelperWithListener
@@ -64,7 +65,8 @@ data class AttachmentsPreviewArgs(
 class AttachmentsPreviewFragment @Inject constructor(
         private val attachmentMiniaturePreviewController: AttachmentMiniaturePreviewController,
         private val attachmentBigPreviewController: AttachmentBigPreviewController,
-        private val colorProvider: ColorProvider
+        private val colorProvider: ColorProvider,
+        private val clock: Clock,
 ) : VectorBaseFragment<FragmentAttachmentsPreviewBinding>(), AttachmentMiniaturePreviewController.Callback {
 
     private val fragmentArgs: AttachmentsPreviewArgs by args()
@@ -192,7 +194,7 @@ class AttachmentsPreviewFragment @Inject constructor(
 
     private fun handleEditAction() = withState(viewModel) {
         val currentAttachment = it.attachments.getOrNull(it.currentAttachmentIndex) ?: return@withState
-        val destinationFile = File(requireContext().cacheDir, currentAttachment.name.insertBeforeLast("_edited_image_${System.currentTimeMillis()}"))
+        val destinationFile = File(requireContext().cacheDir, currentAttachment.name.insertBeforeLast("_edited_image_${clock.epochMillis()}"))
         val uri = currentAttachment.queryUri
         createUCropWithDefaultSettings(colorProvider, uri, destinationFile.toUri(), currentAttachment.name)
                 .getIntent(requireContext())

vector/src/main/java/im/vector/app/features/call/conference/JitsiService.kt

@@ -19,6 +19,7 @@ package im.vector.app.features.call.conference
 import im.vector.app.R
 import im.vector.app.core.network.await
 import im.vector.app.core.resources.StringProvider
+import im.vector.app.core.time.Clock
 import im.vector.app.core.utils.ensureProtocol
 import im.vector.app.core.utils.toBase32String
 import im.vector.app.features.call.conference.jwt.JitsiJWTFactory
@@ -46,7 +47,9 @@ class JitsiService @Inject constructor(
         private val rawService: RawService,
         private val stringProvider: StringProvider,
         private val themeProvider: ThemeProvider,
-        private val jitsiJWTFactory: JitsiJWTFactory) {
+        private val jitsiJWTFactory: JitsiJWTFactory,
+        private val clock: Clock,
+) {
 
     companion object {
         const val JITSI_OPEN_ID_TOKEN_JWT_AUTH = "openidtoken-jwt"
@@ -60,7 +63,7 @@ class JitsiService @Inject constructor(
 
     suspend fun createJitsiWidget(roomId: String, withVideo: Boolean): Widget {
         // Build data for a jitsi widget
-        val widgetId: String = WidgetType.Jitsi.preferred + "_" + session.myUserId + "_" + System.currentTimeMillis()
+        val widgetId: String = WidgetType.Jitsi.preferred + "_" + session.myUserId + "_" + clock.epochMillis()
         val preferredJitsiDomain = tryOrNull {
             rawService.getElementWellknown(session.sessionParams)
                     ?.jitsiServer

vector/src/main/java/im/vector/app/features/call/webrtc/ScreenCaptureService.kt

@@ -21,6 +21,7 @@ import android.os.Binder
 import android.os.IBinder
 import dagger.hilt.android.AndroidEntryPoint
 import im.vector.app.core.services.VectorService
+import im.vector.app.core.time.Clock
 import im.vector.app.features.notifications.NotificationUtils
 import javax.inject.Inject
 
@@ -28,6 +29,7 @@ import javax.inject.Inject
 class ScreenCaptureService : VectorService() {
 
     @Inject lateinit var notificationUtils: NotificationUtils
+    @Inject lateinit var clock: Clock
     private val binder = LocalBinder()
 
     override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
@@ -37,7 +39,7 @@ class ScreenCaptureService : VectorService() {
     }
 
     private fun showStickyNotification() {
-        val notificationId = System.currentTimeMillis().toInt()
+        val notificationId = clock.epochMillis().toInt()
         val notification = notificationUtils.buildScreenSharingNotification()
         startForeground(notificationId, notification)
     }