Remove Try from suspending functions

matrix-sdk-android-rx/src/main/java/im/vector/matrix/rx/MatrixCallbackCompletable.kt

@@ -28,7 +28,7 @@ internal class MatrixCallbackCompletable<T>(private val completableEmitter: Comp
     }
 
     override fun onFailure(failure: Throwable) {
-        completableEmitter.onError(failure)
+        completableEmitter.tryOnError(failure)
     }
 }
 

matrix-sdk-android-rx/src/main/java/im/vector/matrix/rx/MatrixCallbackSingle.kt

@@ -27,7 +27,7 @@ internal class MatrixCallbackSingle<T>(private val singleEmitter: SingleEmitter<
     }
 
     override fun onFailure(failure: Throwable) {
-        singleEmitter.onError(failure)
+        singleEmitter.tryOnError(failure)
     }
 }
 

matrix-sdk-android-rx/src/main/java/im/vector/matrix/rx/RxRoom.kt

@@ -41,7 +41,7 @@ class RxRoom(private val room: Room) {
         return room.liveTimeLineEvent(eventId).asObservable()
     }
 
-    fun loadRoomMembersIfNeeded(): Single<Boolean> = Single.create {
+    fun loadRoomMembersIfNeeded(): Single<Unit> = Single.create {
         room.loadRoomMembersIfNeeded(MatrixCallbackSingle(it)).toSingle(it)
     }
 

matrix-sdk-android/build.gradle

@@ -126,9 +126,6 @@ dependencies {
     // FP
     implementation "io.arrow-kt:arrow-core:$arrow_version"
     implementation "io.arrow-kt:arrow-instances-core:$arrow_version"
-    implementation "io.arrow-kt:arrow-effects:$arrow_version"
-    implementation "io.arrow-kt:arrow-effects-instances:$arrow_version"
-    implementation "io.arrow-kt:arrow-integration-retrofit-adapter:$arrow_version"
 
     // olm lib is now hosted by jitpack: https://jitpack.io/#org.matrix.gitlab.matrix-org/olm
     implementation 'org.matrix.gitlab.matrix-org:olm:3.1.2'

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

@@ -16,7 +16,6 @@
 
 package im.vector.matrix.android.session.room.timeline
 
-import arrow.core.Try
 import im.vector.matrix.android.internal.session.room.timeline.GetContextOfEventTask
 import im.vector.matrix.android.internal.session.room.timeline.PaginationDirection
 import im.vector.matrix.android.internal.session.room.timeline.TokenChunkEventPersistor
@@ -24,7 +23,7 @@ import kotlin.random.Random
 
 internal class FakeGetContextOfEventTask constructor(private val tokenChunkEventPersistor: TokenChunkEventPersistor) : GetContextOfEventTask {
 
-    override suspend fun execute(params: GetContextOfEventTask.Params): Try<TokenChunkEventPersistor.Result> {
+    override suspend fun execute(params: GetContextOfEventTask.Params): TokenChunkEventPersistor.Result {
         val fakeEvents = RoomDataHelper.createFakeListOfEvents(30)
         val tokenChunkEvent = FakeTokenChunkEvent(
                 Random.nextLong(System.currentTimeMillis()).toString(),

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

@@ -16,7 +16,6 @@
 
 package im.vector.matrix.android.session.room.timeline
 
-import arrow.core.Try
 import im.vector.matrix.android.internal.session.room.timeline.PaginationTask
 import im.vector.matrix.android.internal.session.room.timeline.TokenChunkEventPersistor
 import javax.inject.Inject
@@ -24,7 +23,7 @@ import kotlin.random.Random
 
 internal class FakePaginationTask @Inject constructor(private val tokenChunkEventPersistor: TokenChunkEventPersistor) : PaginationTask {
 
-    override suspend fun execute(params: PaginationTask.Params): Try<TokenChunkEventPersistor.Result> {
+    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)
         return tokenChunkEventPersistor.insertInDb(tokenChunkEvent, params.roomId, params.direction)

matrix-sdk-android/src/main/java/im/vector/matrix/android/api/MatrixCallback.kt

@@ -38,4 +38,8 @@ interface MatrixCallback<in T> {
         //no-op
     }
 
+    fun onCanceled() {
+        //no-op
+    }
+
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/members/MembershipService.kt

@@ -30,7 +30,7 @@ interface MembershipService {
      * This methods load all room members if it was done yet.
      * @return a [Cancelable]
      */
-    fun loadRoomMembersIfNeeded(matrixCallback: MatrixCallback<Boolean>): Cancelable
+    fun loadRoomMembersIfNeeded(matrixCallback: MatrixCallback<Unit>): Cancelable
 
     /**
      * Return the roomMember with userId or null.

matrix-sdk-android/src/main/java/im/vector/matrix/android/api/util/CancelableBag.kt

@@ -19,5 +19,6 @@ package im.vector.matrix.android.api.util
 class CancelableBag : Cancelable, MutableList<Cancelable> by ArrayList() {
     override fun cancel() {
         forEach { it.cancel() }
+        clear()
     }
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/auth/DefaultAuthenticator.kt

@@ -68,10 +68,12 @@ internal class DefaultAuthenticator @Inject constructor(@Unauthenticated
                               callback: MatrixCallback<Session>): Cancelable {
 
         val job = GlobalScope.launch(coroutineDispatchers.main) {
-            val sessionOrFailure = authenticate(homeServerConnectionConfig, login, password)
+            val sessionOrFailure = runCatching {
+                authenticate(homeServerConnectionConfig, login, password)
+            }
             sessionOrFailure.foldToCallback(callback)
         }
-        return CancelableCoroutine(job)
+        return CancelableCoroutine(job, callback)
 
     }
 
@@ -85,16 +87,12 @@ internal class DefaultAuthenticator @Inject constructor(@Unauthenticated
         } else {
             PasswordLoginParams.userIdentifier(login, password, "Mobile")
         }
-        executeRequest<Credentials> {
+        val credentials = executeRequest<Credentials> {
             apiCall = authAPI.login(loginParams)
-        }.map {
-            val sessionParams = SessionParams(it, homeServerConnectionConfig)
-            sessionParamsStore.save(sessionParams)
-            sessionParams
-        }.map {
-            sessionManager.getOrCreateSession(it)
         }
-
+        val sessionParams = SessionParams(credentials, homeServerConnectionConfig)
+        sessionParamsStore.save(sessionParams)
+        sessionManager.getOrCreateSession(sessionParams)
     }
 
     private fun buildAuthAPI(homeServerConnectionConfig: HomeServerConnectionConfig): AuthAPI {

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/CryptoManager.kt

@@ -254,35 +254,36 @@ internal class CryptoManager @Inject constructor(
     private suspend fun internalStart(isInitialSync: Boolean) {
         // Open the store
         cryptoStore.open()
-        uploadDeviceKeys()
-                .flatMap { oneTimeKeysUploader.maybeUploadOneTimeKeys() }
-                .fold(
-                        {
-                            Timber.e("Start failed: $it")
-                            delay(1000)
-                            isStarting.set(false)
-                            internalStart(isInitialSync)
-                        },
-                        {
-                            outgoingRoomKeyRequestManager.start()
-                            keysBackup.checkAndStartKeysBackup()
-                            if (isInitialSync) {
-                                // refresh the devices list for each known room members
-                                deviceListManager.invalidateAllDeviceLists()
-                                deviceListManager.refreshOutdatedDeviceLists()
-                            } else {
-                                incomingRoomKeyRequestManager.processReceivedRoomKeyRequests()
-                            }
-                            isStarting.set(false)
-                            isStarted.set(true)
-                        }
-                )
+        runCatching {
+            uploadDeviceKeys()
+            oneTimeKeysUploader.maybeUploadOneTimeKeys()
+            outgoingRoomKeyRequestManager.start()
+            keysBackup.checkAndStartKeysBackup()
+            if (isInitialSync) {
+                // refresh the devices list for each known room members
+                deviceListManager.invalidateAllDeviceLists()
+                deviceListManager.refreshOutdatedDeviceLists()
+            } else {
+                incomingRoomKeyRequestManager.processReceivedRoomKeyRequests()
+            }
+        }.fold(
+                {
+                    isStarting.set(false)
+                    isStarted.set(true)
+                },
+                {
+                    Timber.e("Start failed: $it")
+                    delay(1000)
+                    isStarting.set(false)
+                    internalStart(isInitialSync)
+                }
+        )
     }
 
     /**
      * Close the crypto
      */
-    fun close() {
+    fun close() = runBlocking(coroutineDispatchers.crypto){
         olmDevice.release()
         cryptoStore.close()
         outgoingRoomKeyRequestManager.stop()
@@ -556,13 +557,16 @@ internal class CryptoManager @Inject constructor(
             if (safeAlgorithm != null) {
                 val t0 = System.currentTimeMillis()
                 Timber.v("## encryptEventContent() starts")
-                safeAlgorithm.encryptEventContent(eventContent, eventType, userIds)
+                runCatching {
+                    safeAlgorithm.encryptEventContent(eventContent, eventType, userIds)
+                }
                         .fold(
-                                { callback.onFailure(it) },
                                 {
                                     Timber.v("## encryptEventContent() : succeeds after ${System.currentTimeMillis() - t0} ms")
                                     callback.onSuccess(MXEncryptEventContentResult(it, EventType.ENCRYPTED))
-                                }
+                                },
+                                { callback.onFailure(it) }
+
                         )
             } else {
                 val algorithm = getEncryptionAlgorithm(roomId)
@@ -584,10 +588,7 @@ internal class CryptoManager @Inject constructor(
     @Throws(MXCryptoError::class)
     override fun decryptEvent(event: Event, timeline: String): MXEventDecryptionResult {
         return runBlocking {
-            internalDecryptEvent(event, timeline).fold(
-                    { throw it },
-                    { it }
-            )
+            internalDecryptEvent(event, timeline)
         }
     }
 
@@ -600,8 +601,10 @@ internal class CryptoManager @Inject constructor(
      */
     override fun decryptEventAsync(event: Event, timeline: String, callback: MatrixCallback<MXEventDecryptionResult>) {
         GlobalScope.launch {
-            val result = withContext(coroutineDispatchers.crypto) {
-                internalDecryptEvent(event, timeline)
+            val result = runCatching {
+                withContext(coroutineDispatchers.crypto) {
+                    internalDecryptEvent(event, timeline)
+                }
             }
             result.foldToCallback(callback)
         }
@@ -612,22 +615,22 @@ internal class CryptoManager @Inject constructor(
      *
      * @param event    the raw event.
      * @param timeline the id of the timeline where the event is decrypted. It is used to prevent replay attack.
-     * @return the MXEventDecryptionResult data, or null in case of error wrapped into [Try]
+     * @return the MXEventDecryptionResult data, or null in case of error
      */
-    private suspend fun internalDecryptEvent(event: Event, timeline: String): Try<MXEventDecryptionResult> {
+    private suspend fun internalDecryptEvent(event: Event, timeline: String): MXEventDecryptionResult {
         val eventContent = event.content
-        return if (eventContent == null) {
+        if (eventContent == null) {
             Timber.e("## decryptEvent : empty event content")
-            Try.Failure(MXCryptoError.Base(MXCryptoError.ErrorType.BAD_ENCRYPTED_MESSAGE, MXCryptoError.BAD_ENCRYPTED_MESSAGE_REASON))
+            throw MXCryptoError.Base(MXCryptoError.ErrorType.BAD_ENCRYPTED_MESSAGE, MXCryptoError.BAD_ENCRYPTED_MESSAGE_REASON)
         } else {
             val algorithm = eventContent["algorithm"]?.toString()
             val alg = roomDecryptorProvider.getOrCreateRoomDecryptor(event.roomId, algorithm)
             if (alg == null) {
                 val reason = String.format(MXCryptoError.UNABLE_TO_DECRYPT_REASON, event.eventId, algorithm)
                 Timber.e("## decryptEvent() : $reason")
-                Try.Failure(MXCryptoError.Base(MXCryptoError.ErrorType.UNABLE_TO_DECRYPT, reason))
+                throw MXCryptoError.Base(MXCryptoError.ErrorType.UNABLE_TO_DECRYPT, reason)
             } else {
-                alg.decryptEvent(event, timeline)
+                return alg.decryptEvent(event, timeline)
             }
         }
     }
@@ -689,12 +692,13 @@ internal class CryptoManager @Inject constructor(
     private fun onRoomEncryptionEvent(roomId: String, event: Event) {
         GlobalScope.launch(coroutineDispatchers.crypto) {
             val params = LoadRoomMembersTask.Params(roomId)
-            loadRoomMembersTask
-                    .execute(params)
-                    .map { _ ->
-                        val userIds = getRoomUserIds(roomId)
-                        setEncryptionInRoom(roomId, event.content?.get("algorithm")?.toString(), true, userIds)
-                    }
+            try {
+                loadRoomMembersTask.execute(params)
+                val userIds = getRoomUserIds(roomId)
+                setEncryptionInRoom(roomId, event.content?.get("algorithm")?.toString(), true, userIds)
+            } catch (throwable: Throwable) {
+                Timber.e(throwable)
+            }
         }
     }
 
@@ -761,7 +765,7 @@ internal class CryptoManager @Inject constructor(
     /**
      * Upload my user's device keys.
      */
-    private suspend fun uploadDeviceKeys(): Try<KeysUploadResponse> {
+    private suspend fun uploadDeviceKeys(): KeysUploadResponse {
         // Prepare the device keys data to send
         // Sign it
         val canonicalJson = JsonCanonicalizer.getCanonicalJson(Map::class.java, getMyDevice().signalableJSONDictionary())
@@ -868,10 +872,8 @@ internal class CryptoManager @Inject constructor(
     fun checkUnknownDevices(userIds: List<String>, callback: MatrixCallback<Unit>) {
         // force the refresh to ensure that the devices list is up-to-date
         GlobalScope.launch(coroutineDispatchers.crypto) {
-            deviceListManager
-                    .downloadKeys(userIds, true)
+            runCatching { deviceListManager.downloadKeys(userIds, true) }
                     .fold(
-                            { callback.onFailure(it) },
                             {
                                 val unknownDevices = getUnknownDevices(it)
                                 if (unknownDevices.map.isEmpty()) {
@@ -880,7 +882,8 @@ internal class CryptoManager @Inject constructor(
                                     // trigger an an unknown devices exception
                                     callback.onFailure(Failure.CryptoError(MXCryptoError.UnknownDevice(unknownDevices)))
                                 }
-                            }
+                            },
+                            { callback.onFailure(it) }
                     )
         }
     }
@@ -1035,9 +1038,9 @@ internal class CryptoManager @Inject constructor(
 
     override fun downloadKeys(userIds: List<String>, forceDownload: Boolean, callback: MatrixCallback<MXUsersDevicesMap<MXDeviceInfo>>) {
         GlobalScope.launch(coroutineDispatchers.crypto) {
-            deviceListManager
-                    .downloadKeys(userIds, forceDownload)
-                    .foldToCallback(callback)
+            runCatching {
+                deviceListManager.downloadKeys(userIds, forceDownload)
+            }.foldToCallback(callback)
         }
     }
 

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

@@ -18,14 +18,12 @@
 package im.vector.matrix.android.internal.crypto
 
 import android.text.TextUtils
-import arrow.core.Try
 import im.vector.matrix.android.api.MatrixPatterns
 import im.vector.matrix.android.api.auth.data.Credentials
 import im.vector.matrix.android.internal.crypto.model.MXDeviceInfo
 import im.vector.matrix.android.internal.crypto.model.MXUsersDevicesMap
 import im.vector.matrix.android.internal.crypto.store.IMXCryptoStore
 import im.vector.matrix.android.internal.crypto.tasks.DownloadKeysForUsersTask
-import im.vector.matrix.android.internal.extensions.onError
 import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.session.sync.SyncTokenStore
 import timber.log.Timber
@@ -237,7 +235,7 @@ internal class DeviceListManager @Inject constructor(private val cryptoStore: IM
      * @param forceDownload Always download the keys even if cached.
      * @param callback      the asynchronous callback
      */
-    suspend fun downloadKeys(userIds: List<String>?, forceDownload: Boolean): Try<MXUsersDevicesMap<MXDeviceInfo>> {
+    suspend fun downloadKeys(userIds: List<String>?, forceDownload: Boolean): MXUsersDevicesMap<MXDeviceInfo> {
         Timber.v("## downloadKeys() : forceDownload $forceDownload : $userIds")
         // Map from userId -> deviceId -> MXDeviceInfo
         val stored = MXUsersDevicesMap<MXDeviceInfo>()
@@ -268,16 +266,15 @@ internal class DeviceListManager @Inject constructor(private val cryptoStore: IM
         }
         return if (downloadUsers.isEmpty()) {
             Timber.v("## downloadKeys() : no new user device")
-            Try.just(stored)
+            stored
         } else {
             Timber.v("## downloadKeys() : starts")
             val t0 = System.currentTimeMillis()
-            doKeyDownloadForUsers(downloadUsers)
-                    .map {
-                        Timber.v("## downloadKeys() : doKeyDownloadForUsers succeeds after " + (System.currentTimeMillis() - t0) + " ms")
-                        it.addEntriesFromMap(stored)
-                        it
-                    }
+            val result = doKeyDownloadForUsers(downloadUsers)
+            Timber.v("## downloadKeys() : doKeyDownloadForUsers succeeds after " + (System.currentTimeMillis() - t0) + " ms")
+            result.also {
+                it.addEntriesFromMap(stored)
+            }
         }
     }
 
@@ -286,60 +283,60 @@ internal class DeviceListManager @Inject constructor(private val cryptoStore: IM
      *
      * @param downloadUsers the user ids list
      */
-    private suspend fun doKeyDownloadForUsers(downloadUsers: MutableList<String>): Try<MXUsersDevicesMap<MXDeviceInfo>> {
+    private suspend fun doKeyDownloadForUsers(downloadUsers: MutableList<String>): MXUsersDevicesMap<MXDeviceInfo> {
         Timber.v("## doKeyDownloadForUsers() : doKeyDownloadForUsers $downloadUsers")
         // get the user ids which did not already trigger a keys download
         val filteredUsers = downloadUsers.filter { MatrixPatterns.isUserId(it) }
         if (filteredUsers.isEmpty()) {
             // trigger nothing
-            return Try.just(MXUsersDevicesMap())
+            return MXUsersDevicesMap()
         }
         val params = DownloadKeysForUsersTask.Params(filteredUsers, syncTokenStore.getLastToken())
-        return downloadKeysForUsersTask.execute(params)
-                .map { response ->
-                    Timber.v("## doKeyDownloadForUsers() : Got keys for " + filteredUsers.size + " users")
-                    for (userId in filteredUsers) {
-                        val devices = response.deviceKeys?.get(userId)
-                        Timber.v("## doKeyDownloadForUsers() : Got keys for $userId : $devices")
-                        if (devices != null) {
-                            val mutableDevices = HashMap(devices)
-                            val deviceIds = ArrayList(mutableDevices.keys)
-                            for (deviceId in deviceIds) {
-                                // Get the potential previously store device keys for this device
-                                val previouslyStoredDeviceKeys = cryptoStore.getUserDevice(deviceId, userId)
-                                val deviceInfo = mutableDevices[deviceId]
+        val response = try {
+            downloadKeysForUsersTask.execute(params)
+        } catch (throwable: Throwable) {
+            Timber.e(throwable, "##doKeyDownloadForUsers(): error")
+            onKeysDownloadFailed(filteredUsers)
+            throw throwable
+        }
+        Timber.v("## doKeyDownloadForUsers() : Got keys for " + filteredUsers.size + " users")
+        for (userId in filteredUsers) {
+            val devices = response.deviceKeys?.get(userId)
+            Timber.v("## doKeyDownloadForUsers() : Got keys for $userId : $devices")
+            if (devices != null) {
+                val mutableDevices = HashMap(devices)
+                val deviceIds = ArrayList(mutableDevices.keys)
+                for (deviceId in deviceIds) {
+                    // Get the potential previously store device keys for this device
+                    val previouslyStoredDeviceKeys = cryptoStore.getUserDevice(deviceId, userId)
+                    val deviceInfo = mutableDevices[deviceId]
 
-                                // in some race conditions (like unit tests)
-                                // the self device must be seen as verified
-                                if (TextUtils.equals(deviceInfo!!.deviceId, credentials.deviceId) && TextUtils.equals(userId, credentials.userId)) {
-                                    deviceInfo.verified = MXDeviceInfo.DEVICE_VERIFICATION_VERIFIED
-                                }
-                                // Validate received keys
-                                if (!validateDeviceKeys(deviceInfo, userId, deviceId, previouslyStoredDeviceKeys)) {
-                                    // New device keys are not valid. Do not store them
-                                    mutableDevices.remove(deviceId)
-                                    if (null != previouslyStoredDeviceKeys) {
-                                        // But keep old validated ones if any
-                                        mutableDevices[deviceId] = previouslyStoredDeviceKeys
-                                    }
-                                } else if (null != previouslyStoredDeviceKeys) {
-                                    // The verified status is not sync'ed with hs.
-                                    // This is a client side information, valid only for this client.
-                                    // So, transfer its previous value
-                                    mutableDevices[deviceId]!!.verified = previouslyStoredDeviceKeys.verified
-                                }
-                            }
-                            // Update the store
-                            // Note that devices which aren't in the response will be removed from the stores
-                            cryptoStore.storeUserDevices(userId, mutableDevices)
-                        }
+                    // in some race conditions (like unit tests)
+                    // the self device must be seen as verified
+                    if (TextUtils.equals(deviceInfo!!.deviceId, credentials.deviceId) && TextUtils.equals(userId, credentials.userId)) {
+                        deviceInfo.verified = MXDeviceInfo.DEVICE_VERIFICATION_VERIFIED
+                    }
+                    // Validate received keys
+                    if (!validateDeviceKeys(deviceInfo, userId, deviceId, previouslyStoredDeviceKeys)) {
+                        // New device keys are not valid. Do not store them
+                        mutableDevices.remove(deviceId)
+                        if (null != previouslyStoredDeviceKeys) {
+                            // But keep old validated ones if any
+                            mutableDevices[deviceId] = previouslyStoredDeviceKeys
+                        }
+                    } else if (null != previouslyStoredDeviceKeys) {
+                        // The verified status is not sync'ed with hs.
+                        // This is a client side information, valid only for this client.
+                        // So, transfer its previous value
+                        mutableDevices[deviceId]!!.verified = previouslyStoredDeviceKeys.verified
                     }
-                    onKeysDownloadSucceed(filteredUsers, response.failures)
-                }
-                .onError {
-                    Timber.e(it, "##doKeyDownloadForUsers(): error")
-                    onKeysDownloadFailed(filteredUsers)
                 }
+                // Update the store
+                // Note that devices which aren't in the response will be removed from the stores
+                cryptoStore.storeUserDevices(userId, mutableDevices)
+            }
+        }
+        return onKeysDownloadSucceed(filteredUsers, response.failures)
     }
 
     /**
@@ -465,15 +462,16 @@ internal class DeviceListManager @Inject constructor(private val cryptoStore: IM
         }
 
         cryptoStore.saveDeviceTrackingStatuses(deviceTrackingStatuses)
-        doKeyDownloadForUsers(users)
-                .fold(
-                        {
-                            Timber.e(it, "## refreshOutdatedDeviceLists() : ERROR updating device keys for users $users")
-                        },
-                        {
-                            Timber.v("## refreshOutdatedDeviceLists() : done")
-                        }
-                )
+        runCatching {
+            doKeyDownloadForUsers(users)
+        }.fold(
+                {
+                    Timber.v("## refreshOutdatedDeviceLists() : done")
+                },
+                {
+                    Timber.e(it, "## refreshOutdatedDeviceLists() : ERROR updating device keys for users $users")
+                }
+        )
     }
 
     companion object {

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

@@ -18,7 +18,6 @@
 package im.vector.matrix.android.internal.crypto
 
 import android.text.TextUtils
-import arrow.core.Try
 import im.vector.matrix.android.api.session.crypto.MXCryptoError
 import im.vector.matrix.android.api.util.JSON_DICT_PARAMETERIZED_TYPE
 import im.vector.matrix.android.api.util.JsonDict
@@ -506,25 +505,25 @@ internal class MXOlmDevice @Inject constructor(
                                keysClaimed: Map<String, String>,
                                exportFormat: Boolean): Boolean {
         val session = OlmInboundGroupSessionWrapper(sessionKey, exportFormat)
+        runCatching { getInboundGroupSession(sessionId, senderKey, roomId) }
+                .fold(
+                        {
+                            // If we already have this session, consider updating it
+                            Timber.e("## addInboundGroupSession() : Update for megolm session $senderKey/$sessionId")
 
-        getInboundGroupSession(sessionId, senderKey, roomId).fold(
-                {
-                    // Nothing to do in case of error
-                },
-                {
-                    // If we already have this session, consider updating it
-                    Timber.e("## addInboundGroupSession() : Update for megolm session $senderKey/$sessionId")
+                            val existingFirstKnown = it.firstKnownIndex!!
+                            val newKnownFirstIndex = session.firstKnownIndex
 
-                    val existingFirstKnown = it.firstKnownIndex!!
-                    val newKnownFirstIndex = session.firstKnownIndex
-
-                    //If our existing session is better we keep it
-                    if (newKnownFirstIndex != null && existingFirstKnown <= newKnownFirstIndex) {
-                        session.olmInboundGroupSession?.releaseSession()
-                        return false
-                    }
-                }
-        )
+                            //If our existing session is better we keep it
+                            if (newKnownFirstIndex != null && existingFirstKnown <= newKnownFirstIndex) {
+                                session.olmInboundGroupSession?.releaseSession()
+                                return false
+                            }
+                        },
+                        {
+                            // Nothing to do in case of error
+                        }
+                )
 
         // sanity check
         if (null == session.olmInboundGroupSession) {
@@ -595,12 +594,8 @@ internal class MXOlmDevice @Inject constructor(
                 continue
             }
 
-            getInboundGroupSession(sessionId, senderKey, roomId)
+            runCatching { getInboundGroupSession(sessionId, senderKey, roomId) }
                     .fold(
-                            {
-                                // Session does not already exist, add it
-                                sessions.add(session)
-                            },
                             {
                                 // If we already have this session, consider updating it
                                 Timber.e("## importInboundGroupSession() : Update for megolm session $senderKey/$sessionId")
@@ -613,7 +608,12 @@ internal class MXOlmDevice @Inject constructor(
                                     sessions.add(session)
                                 }
                                 Unit
+                            },
+                            {
+                                // Session does not already exist, add it
+                                sessions.add(session)
                             }
+
                     )
         }
 
@@ -648,61 +648,57 @@ internal class MXOlmDevice @Inject constructor(
                             roomId: String,
                             timeline: String?,
                             sessionId: String,
-                            senderKey: String): Try<OlmDecryptionResult> {
-        return getInboundGroupSession(sessionId, senderKey, roomId)
-                .flatMap { session ->
-                    // Check that the room id matches the original one for the session. This stops
-                    // the HS pretending a message was targeting a different room.
-                    if (roomId == session.roomId) {
-                        var decryptResult: OlmInboundGroupSession.DecryptMessageResult? = null
-                        try {
-                            decryptResult = session.olmInboundGroupSession!!.decryptMessage(body)
-                        } catch (e: OlmException) {
-                            Timber.e(e, "## decryptGroupMessage () : decryptMessage failed")
-                            return@flatMap Try.Failure(MXCryptoError.OlmError(e))
-                        }
+                            senderKey: String): OlmDecryptionResult {
+        val session = getInboundGroupSession(sessionId, senderKey, roomId)
+        // Check that the room id matches the original one for the session. This stops
+        // the HS pretending a message was targeting a different room.
+        if (roomId == session.roomId) {
+            var decryptResult: OlmInboundGroupSession.DecryptMessageResult? = null
+            try {
+                decryptResult = session.olmInboundGroupSession!!.decryptMessage(body)
+            } catch (e: OlmException) {
+                Timber.e(e, "## decryptGroupMessage () : decryptMessage failed")
+                throw MXCryptoError.OlmError(e)
+            }
 
-                        if (null != timeline) {
-                            if (!inboundGroupSessionMessageIndexes.containsKey(timeline)) {
-                                inboundGroupSessionMessageIndexes[timeline] = HashMap()
-                            }
-
-                            val messageIndexKey = senderKey + "|" + sessionId + "|" + decryptResult.mIndex
-
-                            if (inboundGroupSessionMessageIndexes[timeline]?.get(messageIndexKey) != null) {
-                                val reason = String.format(MXCryptoError.DUPLICATE_MESSAGE_INDEX_REASON, decryptResult.mIndex)
-                                Timber.e("## decryptGroupMessage() : $reason")
-                                return@flatMap Try.Failure(MXCryptoError.Base(MXCryptoError.ErrorType.DUPLICATED_MESSAGE_INDEX, reason))
-                            }
-
-                            inboundGroupSessionMessageIndexes[timeline]!!.put(messageIndexKey, true)
-                        }
-
-                        store.storeInboundGroupSessions(listOf(session))
-                        val payload = try {
-                            val adapter = MoshiProvider.providesMoshi().adapter<JsonDict>(JSON_DICT_PARAMETERIZED_TYPE)
-                            val payloadString = convertFromUTF8(decryptResult.mDecryptedMessage)
-                            adapter.fromJson(payloadString)
-                        } catch (e: Exception) {
-                            Timber.e("## decryptGroupMessage() : fails to parse the payload")
-                            return@flatMap Try.Failure(
-                                    MXCryptoError.Base(MXCryptoError.ErrorType.BAD_DECRYPTED_FORMAT, MXCryptoError.BAD_DECRYPTED_FORMAT_TEXT_REASON))
-                        }
-
-                        return@flatMap Try.just(
-                                OlmDecryptionResult(
-                                        payload,
-                                        session.keysClaimed,
-                                        senderKey,
-                                        session.forwardingCurve25519KeyChain
-                                )
-                        )
-                    } else {
-                        val reason = String.format(MXCryptoError.INBOUND_SESSION_MISMATCH_ROOM_ID_REASON, roomId, session.roomId)
-                        Timber.e("## decryptGroupMessage() : $reason")
-                        return@flatMap Try.Failure(MXCryptoError.Base(MXCryptoError.ErrorType.INBOUND_SESSION_MISMATCH_ROOM_ID, reason))
-                    }
+            if (null != timeline) {
+                if (!inboundGroupSessionMessageIndexes.containsKey(timeline)) {
+                    inboundGroupSessionMessageIndexes[timeline] = HashMap()
                 }
+
+                val messageIndexKey = senderKey + "|" + sessionId + "|" + decryptResult.mIndex
+
+                if (inboundGroupSessionMessageIndexes[timeline]?.get(messageIndexKey) != null) {
+                    val reason = String.format(MXCryptoError.DUPLICATE_MESSAGE_INDEX_REASON, decryptResult.mIndex)
+                    Timber.e("## decryptGroupMessage() : $reason")
+                    throw MXCryptoError.Base(MXCryptoError.ErrorType.DUPLICATED_MESSAGE_INDEX, reason)
+                }
+
+                inboundGroupSessionMessageIndexes[timeline]!!.put(messageIndexKey, true)
+            }
+
+            store.storeInboundGroupSessions(listOf(session))
+            val payload = try {
+                val adapter = MoshiProvider.providesMoshi().adapter<JsonDict>(JSON_DICT_PARAMETERIZED_TYPE)
+                val payloadString = convertFromUTF8(decryptResult.mDecryptedMessage)
+                adapter.fromJson(payloadString)
+            } catch (e: Exception) {
+                Timber.e("## decryptGroupMessage() : fails to parse the payload")
+                throw
+                MXCryptoError.Base(MXCryptoError.ErrorType.BAD_DECRYPTED_FORMAT, MXCryptoError.BAD_DECRYPTED_FORMAT_TEXT_REASON)
+            }
+
+            return OlmDecryptionResult(
+                    payload,
+                    session.keysClaimed,
+                    senderKey,
+                    session.forwardingCurve25519KeyChain
+            )
+        } else {
+            val reason = String.format(MXCryptoError.INBOUND_SESSION_MISMATCH_ROOM_ID_REASON, roomId, session.roomId)
+            Timber.e("## decryptGroupMessage() : $reason")
+            throw MXCryptoError.Base(MXCryptoError.ErrorType.INBOUND_SESSION_MISMATCH_ROOM_ID, reason)
+        }
     }
 
     /**
@@ -766,26 +762,26 @@ internal class MXOlmDevice @Inject constructor(
      * @param senderKey the base64-encoded curve25519 key of the sender.
      * @return the inbound group session.
      */
-    fun getInboundGroupSession(sessionId: String?, senderKey: String?, roomId: String?): Try<OlmInboundGroupSessionWrapper> {
+    fun getInboundGroupSession(sessionId: String?, senderKey: String?, roomId: String?): OlmInboundGroupSessionWrapper {
         if (sessionId.isNullOrBlank() || senderKey.isNullOrBlank()) {
-            return Try.Failure(MXCryptoError.Base(MXCryptoError.ErrorType.MISSING_SENDER_KEY, MXCryptoError.ERROR_MISSING_PROPERTY_REASON))
+            throw MXCryptoError.Base(MXCryptoError.ErrorType.MISSING_SENDER_KEY, MXCryptoError.ERROR_MISSING_PROPERTY_REASON)
         }
 
         val session = store.getInboundGroupSession(sessionId, senderKey)
 
-        return if (null != session) {
+        if (session != null) {
             // Check that the room id matches the original one for the session. This stops
             // the HS pretending a message was targeting a different room.
             if (!TextUtils.equals(roomId, session.roomId)) {
                 val errorDescription = String.format(MXCryptoError.INBOUND_SESSION_MISMATCH_ROOM_ID_REASON, roomId, session.roomId)
                 Timber.e("## getInboundGroupSession() : $errorDescription")
-                Try.Failure(MXCryptoError.Base(MXCryptoError.ErrorType.INBOUND_SESSION_MISMATCH_ROOM_ID, errorDescription))
+                throw MXCryptoError.Base(MXCryptoError.ErrorType.INBOUND_SESSION_MISMATCH_ROOM_ID, errorDescription)
             } else {
-                Try.just(session)
+                return session
             }
         } else {
             Timber.e("## getInboundGroupSession() : Cannot retrieve inbound group session $sessionId")
-            Try.Failure(MXCryptoError.Base(MXCryptoError.ErrorType.UNKNOWN_INBOUND_SESSION_ID, MXCryptoError.UNKNOWN_INBOUND_SESSION_ID_REASON))
+            throw MXCryptoError.Base(MXCryptoError.ErrorType.UNKNOWN_INBOUND_SESSION_ID, MXCryptoError.UNKNOWN_INBOUND_SESSION_ID_REASON)
         }
     }
 
@@ -798,6 +794,6 @@ internal class MXOlmDevice @Inject constructor(
      * @return true if the unbound session keys are known.
      */
     fun hasInboundSessionKeys(roomId: String, senderKey: String, sessionId: String): Boolean {
-        return getInboundGroupSession(sessionId, senderKey, roomId).isSuccess()
+        return runCatching { getInboundGroupSession(sessionId, senderKey, roomId) }.isSuccess
     }
 }

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

@@ -16,8 +16,6 @@
 
 package im.vector.matrix.android.internal.crypto
 
-import arrow.core.Try
-import arrow.instances.`try`.applicativeError.handleError
 import im.vector.matrix.android.api.auth.data.Credentials
 import im.vector.matrix.android.internal.crypto.model.MXKey
 import im.vector.matrix.android.internal.crypto.model.rest.KeysUploadResponse
@@ -59,13 +57,13 @@ internal class OneTimeKeysUploader @Inject constructor(
     /**
      * Check if the OTK must be uploaded.
      */
-    suspend fun maybeUploadOneTimeKeys(): Try<Unit> {
+    suspend fun maybeUploadOneTimeKeys() {
         if (oneTimeKeyCheckInProgress) {
-            return Try.just(Unit)
+            return
         }
         if (System.currentTimeMillis() - lastOneTimeKeyCheck < ONE_TIME_KEY_UPLOAD_PERIOD) {
             // we've done a key upload recently.
-            return Try.just(Unit)
+            return
         }
 
         lastOneTimeKeyCheck = System.currentTimeMillis()
@@ -81,41 +79,31 @@ internal class OneTimeKeysUploader @Inject constructor(
         // discard the oldest private keys first. This will eventually clean
         // out stale private keys that won't receive a message.
         val keyLimit = Math.floor(maxOneTimeKeys / 2.0).toInt()
-        val result = if (oneTimeKeyCount != null) {
+        if (oneTimeKeyCount != null) {
             uploadOTK(oneTimeKeyCount!!, keyLimit)
         } else {
             // ask the server how many keys we have
             val uploadKeysParams = UploadKeysTask.Params(null, null, credentials.deviceId!!)
-            uploadKeysTask.execute(uploadKeysParams)
-                    .flatMap {
-                        // We need to keep a pool of one time public keys on the server so that
-                        // other devices can start conversations with us. But we can only store
-                        // a finite number of private keys in the olm Account object.
-                        // To complicate things further then can be a delay between a device
-                        // claiming a public one time key from the server and it sending us a
-                        // message. We need to keep the corresponding private key locally until
-                        // we receive the message.
-                        // But that message might never arrive leaving us stuck with duff
-                        // private keys clogging up our local storage.
-                        // So we need some kind of engineering compromise to balance all of
-                        // these factors.
-                        // TODO Why we do not set oneTimeKeyCount here?
-                        // TODO This is not needed anymore, see https://github.com/matrix-org/matrix-js-sdk/pull/493 (TODO on iOS also)
-                        val keyCount = it.oneTimeKeyCountsForAlgorithm(MXKey.KEY_SIGNED_CURVE_25519_TYPE)
-                        uploadOTK(keyCount, keyLimit)
-                    }
+            val response = uploadKeysTask.execute(uploadKeysParams)
+            // We need to keep a pool of one time public keys on the server so that
+            // other devices can start conversations with us. But we can only store
+            // a finite number of private keys in the olm Account object.
+            // To complicate things further then can be a delay between a device
+            // claiming a public one time key from the server and it sending us a
+            // message. We need to keep the corresponding private key locally until
+            // we receive the message.
+            // But that message might never arrive leaving us stuck with duff
+            // private keys clogging up our local storage.
+            // So we need some kind of engineering compromise to balance all of
+            // these factors.
+            // TODO Why we do not set oneTimeKeyCount here?
+            // TODO This is not needed anymore, see https://github.com/matrix-org/matrix-js-sdk/pull/493 (TODO on iOS also)
+            val keyCount = response.oneTimeKeyCountsForAlgorithm(MXKey.KEY_SIGNED_CURVE_25519_TYPE)
+            uploadOTK(keyCount, keyLimit)
         }
-        return result
-                .map {
-                    Timber.v("## uploadKeys() : success")
-                    oneTimeKeyCount = null
-                    oneTimeKeyCheckInProgress = false
-                }
-                .handleError {
-                    Timber.e(it, "## uploadKeys() : failed")
-                    oneTimeKeyCount = null
-                    oneTimeKeyCheckInProgress = false
-                }
+        Timber.v("## uploadKeys() : success")
+        oneTimeKeyCount = null
+        oneTimeKeyCheckInProgress = false
     }
 
     /**
@@ -124,29 +112,26 @@ internal class OneTimeKeysUploader @Inject constructor(
      * @param keyCount the key count
      * @param keyLimit the limit
      */
-    private suspend fun uploadOTK(keyCount: Int, keyLimit: Int): Try<Unit> {
+    private suspend fun uploadOTK(keyCount: Int, keyLimit: Int) {
         if (keyLimit <= keyCount) {
             // If we don't need to generate any more keys then we are done.
-            return Try.just(Unit)
+            return
         }
-
         val keysThisLoop = Math.min(keyLimit - keyCount, ONE_TIME_KEY_GENERATION_MAX_NUMBER)
         olmDevice.generateOneTimeKeys(keysThisLoop)
-        return uploadOneTimeKeys()
-                .flatMap {
-                    if (it.hasOneTimeKeyCountsForAlgorithm(MXKey.KEY_SIGNED_CURVE_25519_TYPE)) {
-                        uploadOTK(it.oneTimeKeyCountsForAlgorithm(MXKey.KEY_SIGNED_CURVE_25519_TYPE), keyLimit)
-                    } else {
-                        Timber.e("## uploadLoop() : response for uploading keys does not contain one_time_key_counts.signed_curve25519")
-                        Try.raise(Exception("response for uploading keys does not contain one_time_key_counts.signed_curve25519"))
-                    }
-                }
+        val response = uploadOneTimeKeys()
+        if (response.hasOneTimeKeyCountsForAlgorithm(MXKey.KEY_SIGNED_CURVE_25519_TYPE)) {
+            uploadOTK(response.oneTimeKeyCountsForAlgorithm(MXKey.KEY_SIGNED_CURVE_25519_TYPE), keyLimit)
+        } else {
+            Timber.e("## uploadLoop() : response for uploading keys does not contain one_time_key_counts.signed_curve25519")
+            throw Exception("response for uploading keys does not contain one_time_key_counts.signed_curve25519")
+        }
     }
 
     /**
      * Upload my user's one time keys.
      */
-    private suspend fun uploadOneTimeKeys(): Try<KeysUploadResponse> {
+    private suspend fun uploadOneTimeKeys(): KeysUploadResponse {
         val oneTimeKeys = olmDevice.getOneTimeKeys()
         val oneTimeJson = HashMap<String, Any>()
 
@@ -169,13 +154,10 @@ internal class OneTimeKeysUploader @Inject constructor(
         // For now, we set the device id explicitly, as we may not be using the
         // same one as used in login.
         val uploadParams = UploadKeysTask.Params(null, oneTimeJson, credentials.deviceId!!)
-        return uploadKeysTask
-                .execute(uploadParams)
-                .map {
-                    lastPublishedOneTimeKeys = oneTimeKeys
-                    olmDevice.markKeysAsPublished()
-                    it
-                }
+        val response = uploadKeysTask.execute(uploadParams)
+        lastPublishedOneTimeKeys = oneTimeKeys
+        olmDevice.markKeysAsPublished()
+        return response
     }
 
     companion object {

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/actions/EnsureOlmSessionsForDevicesAction.kt

@@ -17,7 +17,6 @@
 package im.vector.matrix.android.internal.crypto.actions
 
 import android.text.TextUtils
-import arrow.core.Try
 import im.vector.matrix.android.internal.crypto.MXOlmDevice
 import im.vector.matrix.android.internal.crypto.model.MXDeviceInfo
 import im.vector.matrix.android.internal.crypto.model.MXKey
@@ -32,7 +31,7 @@ internal class EnsureOlmSessionsForDevicesAction @Inject constructor(private val
                                                                      private val oneTimeKeysForUsersDeviceTask: ClaimOneTimeKeysForUsersDeviceTask) {
 
 
-    suspend fun handle(devicesByUser: Map<String, List<MXDeviceInfo>>): Try<MXUsersDevicesMap<MXOlmSessionResult>> {
+    suspend fun handle(devicesByUser: Map<String, List<MXDeviceInfo>>): MXUsersDevicesMap<MXOlmSessionResult> {
         val devicesWithoutSession = ArrayList<MXDeviceInfo>()
 
         val results = MXUsersDevicesMap<MXOlmSessionResult>()
@@ -58,7 +57,7 @@ internal class EnsureOlmSessionsForDevicesAction @Inject constructor(private val
         }
 
         if (devicesWithoutSession.size == 0) {
-            return Try.just(results)
+            return results
         }
 
         // Prepare the request for claiming one-time keys
@@ -79,39 +78,36 @@ internal class EnsureOlmSessionsForDevicesAction @Inject constructor(private val
         Timber.v("## claimOneTimeKeysForUsersDevices() : $usersDevicesToClaim")
 
         val claimParams = ClaimOneTimeKeysForUsersDeviceTask.Params(usersDevicesToClaim)
-        return oneTimeKeysForUsersDeviceTask
-                .execute(claimParams)
-                .map {
-                    Timber.v("## claimOneTimeKeysForUsersDevices() : keysClaimResponse.oneTimeKeys: $it")
-                    for (userId in userIds) {
-                        val deviceInfos = devicesByUser[userId]
-                        for (deviceInfo in deviceInfos!!) {
-                            var oneTimeKey: MXKey? = null
-                            val deviceIds = it.getUserDeviceIds(userId)
-                            if (null != deviceIds) {
-                                for (deviceId in deviceIds) {
-                                    val olmSessionResult = results.getObject(userId, deviceId)
-                                    if (olmSessionResult!!.sessionId != null) {
-                                        // We already have a result for this device
-                                        continue
-                                    }
-                                    val key = it.getObject(userId, deviceId)
-                                    if (key?.type == oneTimeKeyAlgorithm) {
-                                        oneTimeKey = key
-                                    }
-                                    if (oneTimeKey == null) {
-                                        Timber.v("## ensureOlmSessionsForDevices() : No one-time keys " + oneTimeKeyAlgorithm
-                                                + " for device " + userId + " : " + deviceId)
-                                        continue
-                                    }
-                                    // Update the result for this device in results
-                                    olmSessionResult.sessionId = verifyKeyAndStartSession(oneTimeKey, userId, deviceInfo)
-                                }
-                            }
+        val oneTimeKeys = oneTimeKeysForUsersDeviceTask.execute(claimParams)
+        Timber.v("## claimOneTimeKeysForUsersDevices() : keysClaimResponse.oneTimeKeys: $oneTimeKeys")
+        for (userId in userIds) {
+            val deviceInfos = devicesByUser[userId]
+            for (deviceInfo in deviceInfos!!) {
+                var oneTimeKey: MXKey? = null
+                val deviceIds = oneTimeKeys.getUserDeviceIds(userId)
+                if (null != deviceIds) {
+                    for (deviceId in deviceIds) {
+                        val olmSessionResult = results.getObject(userId, deviceId)
+                        if (olmSessionResult!!.sessionId != null) {
+                            // We already have a result for this device
+                            continue
                         }
+                        val key = oneTimeKeys.getObject(userId, deviceId)
+                        if (key?.type == oneTimeKeyAlgorithm) {
+                            oneTimeKey = key
+                        }
+                        if (oneTimeKey == null) {
+                            Timber.v("## ensureOlmSessionsForDevices() : No one-time keys " + oneTimeKeyAlgorithm
+                                    + " for device " + userId + " : " + deviceId)
+                            continue
+                        }
+                        // Update the result for this device in results
+                        olmSessionResult.sessionId = verifyKeyAndStartSession(oneTimeKey, userId, deviceInfo)
                     }
-                    results
                 }
+            }
+        }
+        return results
     }
 
     private fun verifyKeyAndStartSession(oneTimeKey: MXKey, userId: String, deviceInfo: MXDeviceInfo): String? {

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/actions/EnsureOlmSessionsForUsersAction.kt

@@ -37,7 +37,7 @@ internal class EnsureOlmSessionsForUsersAction @Inject constructor(private val o
      * Try to make sure we have established olm sessions for the given users.
      * @param users    a list of user ids.
      */
-    suspend fun handle(users: List<String>) : Try<MXUsersDevicesMap<MXOlmSessionResult>> {
+    suspend fun handle(users: List<String>) : MXUsersDevicesMap<MXOlmSessionResult> {
         Timber.v("## ensureOlmSessionsForUsers() : ensureOlmSessionsForUsers $users")
         val devicesByUser = HashMap<String /* userId */, MutableList<MXDeviceInfo>>()
 

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/algorithms/IMXDecrypting.kt

@@ -35,7 +35,7 @@ internal interface IMXDecrypting {
      * @param timeline the id of the timeline where the event is decrypted. It is used to prevent replay attack.
      * @return the decryption information, or an error
      */
-    suspend fun decryptEvent(event: Event, timeline: String): Try<MXEventDecryptionResult>
+    suspend fun decryptEvent(event: Event, timeline: String): MXEventDecryptionResult
 
     /**
      * Handle a key event.

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/algorithms/IMXEncrypting.kt

@@ -17,7 +17,6 @@
 
 package im.vector.matrix.android.internal.crypto.algorithms
 
-import arrow.core.Try
 import im.vector.matrix.android.api.session.events.model.Content
 
 /**
@@ -31,7 +30,7 @@ internal interface IMXEncrypting {
      * @param eventContent the content of the event.
      * @param eventType    the type of the event.
      * @param userIds      the room members the event will be sent to.
-     * @return the encrypted content wrapped by [Try]
+     * @return the encrypted content
      */
-    suspend fun encryptEventContent(eventContent: Content, eventType: String, userIds: List<String>): Try<Content>
+    suspend fun encryptEventContent(eventContent: Content, eventType: String, userIds: List<String>): Content
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/algorithms/megolm/MXMegolmDecryption.kt

@@ -18,7 +18,6 @@
 package im.vector.matrix.android.internal.crypto.algorithms.megolm
 
 import android.text.TextUtils
-import arrow.core.Try
 import im.vector.matrix.android.api.auth.data.Credentials
 import im.vector.matrix.android.api.session.crypto.MXCryptoError
 import im.vector.matrix.android.api.session.events.model.Event
@@ -40,7 +39,6 @@ import im.vector.matrix.android.internal.util.MatrixCoroutineDispatchers
 import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.launch
 import timber.log.Timber
-import kotlin.collections.HashMap
 
 internal class MXMegolmDecryption(private val credentials: Credentials,
                                   private val olmDevice: MXOlmDevice,
@@ -61,30 +59,46 @@ internal class MXMegolmDecryption(private val credentials: Credentials,
      */
     private var pendingEvents: MutableMap<String /* senderKey|sessionId */, MutableMap<String /* timelineId */, MutableList<Event>>> = HashMap()
 
-    override suspend fun decryptEvent(event: Event, timeline: String): Try<MXEventDecryptionResult> {
+    override suspend fun decryptEvent(event: Event, timeline: String): MXEventDecryptionResult {
         return decryptEvent(event, timeline, true)
     }
 
-    private fun decryptEvent(event: Event, timeline: String, requestKeysOnFail: Boolean): Try<MXEventDecryptionResult> {
+    private suspend fun decryptEvent(event: Event, timeline: String, requestKeysOnFail: Boolean): MXEventDecryptionResult {
         if (event.roomId.isNullOrBlank()) {
-            return Try.Failure(MXCryptoError.Base(MXCryptoError.ErrorType.MISSING_FIELDS, MXCryptoError.MISSING_FIELDS_REASON))
+            throw MXCryptoError.Base(MXCryptoError.ErrorType.MISSING_FIELDS, MXCryptoError.MISSING_FIELDS_REASON)
         }
 
         val encryptedEventContent = event.content.toModel<EncryptedEventContent>()
-                ?: return Try.Failure(MXCryptoError.Base(MXCryptoError.ErrorType.MISSING_FIELDS, MXCryptoError.MISSING_FIELDS_REASON))
+                ?: throw MXCryptoError.Base(MXCryptoError.ErrorType.MISSING_FIELDS, MXCryptoError.MISSING_FIELDS_REASON)
 
         if (encryptedEventContent.senderKey.isNullOrBlank()
                 || encryptedEventContent.sessionId.isNullOrBlank()
                 || encryptedEventContent.ciphertext.isNullOrBlank()) {
-            return Try.Failure(MXCryptoError.Base(MXCryptoError.ErrorType.MISSING_FIELDS, MXCryptoError.MISSING_FIELDS_REASON))
+            throw MXCryptoError.Base(MXCryptoError.ErrorType.MISSING_FIELDS, MXCryptoError.MISSING_FIELDS_REASON)
         }
 
-        return olmDevice.decryptGroupMessage(encryptedEventContent.ciphertext,
-                event.roomId,
-                timeline,
-                encryptedEventContent.sessionId,
-                encryptedEventContent.senderKey)
+        return runCatching {
+            olmDevice.decryptGroupMessage(encryptedEventContent.ciphertext,
+                    event.roomId,
+                    timeline,
+                    encryptedEventContent.sessionId,
+                    encryptedEventContent.senderKey)
+        }
                 .fold(
+                        { olmDecryptionResult ->
+                            // the decryption succeeds
+                            if (olmDecryptionResult.payload != null) {
+                                MXEventDecryptionResult(
+                                        clearEvent = olmDecryptionResult.payload,
+                                        senderCurve25519Key = olmDecryptionResult.senderKey,
+                                        claimedEd25519Key = olmDecryptionResult.keysClaimed?.get("ed25519"),
+                                        forwardingCurve25519KeyChain = olmDecryptionResult.forwardingCurve25519KeyChain
+                                                ?: emptyList()
+                                )
+                            } else {
+                                throw MXCryptoError.Base(MXCryptoError.ErrorType.MISSING_FIELDS, MXCryptoError.MISSING_FIELDS_REASON)
+                            }
+                        },
                         { throwable ->
                             if (throwable is MXCryptoError.OlmError) {
                                 // TODO Check the value of .message
@@ -98,10 +112,10 @@ internal class MXMegolmDecryption(private val credentials: Credentials,
                                 val reason = String.format(MXCryptoError.OLM_REASON, throwable.olmException.message)
                                 val detailedReason = String.format(MXCryptoError.DETAILED_OLM_REASON, encryptedEventContent.ciphertext, reason)
 
-                                Try.Failure(MXCryptoError.Base(
+                                throw MXCryptoError.Base(
                                         MXCryptoError.ErrorType.OLM,
                                         reason,
-                                        detailedReason))
+                                        detailedReason)
                             }
                             if (throwable is MXCryptoError.Base) {
                                 if (throwable.errorType == MXCryptoError.ErrorType.UNKNOWN_INBOUND_SESSION_ID) {
@@ -111,23 +125,7 @@ internal class MXMegolmDecryption(private val credentials: Credentials,
                                     }
                                 }
                             }
-
-                            Try.Failure(throwable)
-                        },
-                        { olmDecryptionResult ->
-                            // the decryption succeeds
-                            if (olmDecryptionResult.payload != null) {
-                                Try.just(
-                                        MXEventDecryptionResult(
-                                                clearEvent = olmDecryptionResult.payload,
-                                                senderCurve25519Key = olmDecryptionResult.senderKey,
-                                                claimedEd25519Key = olmDecryptionResult.keysClaimed?.get("ed25519"),
-                                                forwardingCurve25519KeyChain = olmDecryptionResult.forwardingCurve25519KeyChain ?: emptyList()
-                                        )
-                                )
-                            } else {
-                                Try.Failure(MXCryptoError.Base(MXCryptoError.ErrorType.MISSING_FIELDS, MXCryptoError.MISSING_FIELDS_REASON))
-                            }
+                            throw throwable
                         }
                 )
     }
@@ -311,51 +309,48 @@ internal class MXMegolmDecryption(private val credentials: Credentials,
         }
         val userId = request.userId ?: return
         GlobalScope.launch(coroutineDispatchers.crypto) {
-            deviceListManager
-                    .downloadKeys(listOf(userId), false)
-                    .flatMap {
+            runCatching { deviceListManager.downloadKeys(listOf(userId), false) }
+                    .mapCatching {
                         val deviceId = request.deviceId
                         val deviceInfo = cryptoStore.getUserDevice(deviceId ?: "", userId)
                         if (deviceInfo == null) {
                             throw RuntimeException()
                         } else {
                             val devicesByUser = mapOf(userId to listOf(deviceInfo))
-                            ensureOlmSessionsForDevicesAction
-                                    .handle(devicesByUser)
-                                    .flatMap {
-                                        val body = request.requestBody
-                                        val olmSessionResult = it.getObject(userId, deviceId)
-                                        if (olmSessionResult?.sessionId == null) {
-                                            // no session with this device, probably because there
-                                            // were no one-time keys.
-                                            Try.just(Unit)
-                                        }
-                                        Timber.v("## shareKeysWithDevice() : sharing keys for session" +
-                                                " ${body?.senderKey}|${body?.sessionId} with device $userId:$deviceId")
+                            val usersDeviceMap = ensureOlmSessionsForDevicesAction.handle(devicesByUser)
+                            val body = request.requestBody
+                            val olmSessionResult = usersDeviceMap.getObject(userId, deviceId)
+                            if (olmSessionResult?.sessionId == null) {
+                                // no session with this device, probably because there
+                                // were no one-time keys.
+                                return@mapCatching
+                            }
+                            Timber.v("## shareKeysWithDevice() : sharing keys for session" +
+                                    " ${body?.senderKey}|${body?.sessionId} with device $userId:$deviceId")
 
-                                        val payloadJson = mutableMapOf<String, Any>("type" to EventType.FORWARDED_ROOM_KEY)
+                            val payloadJson = mutableMapOf<String, Any>("type" to EventType.FORWARDED_ROOM_KEY)
+                            runCatching { olmDevice.getInboundGroupSession(body?.sessionId, body?.senderKey, body?.roomId) }
+                                    .fold(
+                                            {
+                                                // TODO
+                                                payloadJson["content"] = it.exportKeys()
+                                                        ?: ""
+                                            },
+                                            {
+                                                // TODO
+                                            }
 
-                                        olmDevice.getInboundGroupSession(body?.sessionId, body?.senderKey, body?.roomId)
-                                                .fold(
-                                                        {
-                                                            // TODO
-                                                        },
-                                                        {
-                                                            // TODO
-                                                            payloadJson["content"] = it.exportKeys() ?: ""
-                                                        }
-                                                )
+                                    )
 
-                                        val encodedPayload = messageEncrypter.encryptMessage(payloadJson, listOf(deviceInfo))
-                                        val sendToDeviceMap = MXUsersDevicesMap<Any>()
-                                        sendToDeviceMap.setObject(userId, deviceId, encodedPayload)
-                                        Timber.v("## shareKeysWithDevice() : sending to $userId:$deviceId")
-                                        val sendToDeviceParams = SendToDeviceTask.Params(EventType.ENCRYPTED, sendToDeviceMap)
-                                        sendToDeviceTask.execute(sendToDeviceParams)
-                                    }
+                            val encodedPayload = messageEncrypter.encryptMessage(payloadJson, listOf(deviceInfo))
+                            val sendToDeviceMap = MXUsersDevicesMap<Any>()
+                            sendToDeviceMap.setObject(userId, deviceId, encodedPayload)
+                            Timber.v("## shareKeysWithDevice() : sending to $userId:$deviceId")
+                            val sendToDeviceParams = SendToDeviceTask.Params(EventType.ENCRYPTED, sendToDeviceMap)
+                            sendToDeviceTask.execute(sendToDeviceParams)
                         }
                     }
         }
     }
-
 }
+

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

@@ -19,7 +19,6 @@
 package im.vector.matrix.android.internal.crypto.algorithms.megolm
 
 import android.text.TextUtils
-import arrow.core.Try
 import im.vector.matrix.android.api.auth.data.Credentials
 import im.vector.matrix.android.api.session.crypto.MXCryptoError
 import im.vector.matrix.android.api.session.events.model.Content
@@ -69,12 +68,10 @@ internal class MXMegolmEncryption(
 
     override suspend fun encryptEventContent(eventContent: Content,
                                              eventType: String,
-                                             userIds: List<String>): Try<Content> {
-        return getDevicesInRoom(userIds)
-                .flatMap { ensureOutboundSession(it) }
-                .flatMap {
-                    encryptContent(it, eventType, eventContent)
-                }
+                                             userIds: List<String>): Content {
+        val devices = getDevicesInRoom(userIds)
+        val outboundSession = ensureOutboundSession(devices)
+        return encryptContent(outboundSession, eventType, eventContent)
     }
 
     /**
@@ -101,7 +98,7 @@ internal class MXMegolmEncryption(
      *
      * @param devicesInRoom the devices list
      */
-    private suspend fun ensureOutboundSession(devicesInRoom: MXUsersDevicesMap<MXDeviceInfo>): Try<MXOutboundSessionInfo> {
+    private suspend fun ensureOutboundSession(devicesInRoom: MXUsersDevicesMap<MXDeviceInfo>): MXOutboundSessionInfo {
         var session = outboundSession
         if (session == null
                 // Need to make a brand new session?
@@ -126,7 +123,8 @@ internal class MXMegolmEncryption(
                 }
             }
         }
-        return shareKey(safeSession, shareMap).map { safeSession!! }
+        shareKey(safeSession, shareMap)
+        return safeSession
     }
 
     /**
@@ -136,11 +134,11 @@ internal class MXMegolmEncryption(
      * @param devicesByUsers the devices map
      */
     private suspend fun shareKey(session: MXOutboundSessionInfo,
-                                 devicesByUsers: Map<String, List<MXDeviceInfo>>): Try<Unit> {
+                                 devicesByUsers: Map<String, List<MXDeviceInfo>>) {
         // nothing to send, the task is done
         if (devicesByUsers.isEmpty()) {
             Timber.v("## shareKey() : nothing more to do")
-            return Try.just(Unit)
+            return
         }
         // reduce the map size to avoid request timeout when there are too many devices (Users size  * devices per user)
         val subMap = HashMap<String, List<MXDeviceInfo>>()
@@ -157,11 +155,9 @@ internal class MXMegolmEncryption(
             }
         }
         Timber.v("## shareKey() ; userId $userIds")
-        return shareUserDevicesKey(session, subMap)
-                .flatMap {
-                    val remainingDevices = devicesByUsers.filterKeys { userIds.contains(it).not() }
-                    shareKey(session, remainingDevices)
-                }
+        shareUserDevicesKey(session, subMap)
+        val remainingDevices = devicesByUsers.filterKeys { userIds.contains(it).not() }
+        shareKey(session, remainingDevices)
     }
 
     /**
@@ -172,7 +168,7 @@ internal class MXMegolmEncryption(
      * @param callback      the asynchronous callback
      */
     private suspend fun shareUserDevicesKey(session: MXOutboundSessionInfo,
-                                            devicesByUser: Map<String, List<MXDeviceInfo>>): Try<Unit> {
+                                            devicesByUser: Map<String, List<MXDeviceInfo>>) {
         val sessionKey = olmDevice.getSessionKey(session.sessionId)
         val chainIndex = olmDevice.getMessageIndex(session.sessionId)
 
@@ -190,94 +186,86 @@ internal class MXMegolmEncryption(
         var t0 = System.currentTimeMillis()
         Timber.v("## shareUserDevicesKey() : starts")
 
-        return ensureOlmSessionsForDevicesAction.handle(devicesByUser)
-                .flatMap {
-                    Timber.v("## shareUserDevicesKey() : ensureOlmSessionsForDevices succeeds after "
-                            + (System.currentTimeMillis() - t0) + " ms")
-                    val contentMap = MXUsersDevicesMap<Any>()
-                    var haveTargets = false
-                    val userIds = it.userIds
-                    for (userId in userIds) {
-                        val devicesToShareWith = devicesByUser[userId]
-                        for ((deviceID) in devicesToShareWith!!) {
-                            val sessionResult = it.getObject(userId, deviceID)
-                            if (sessionResult?.sessionId == null) {
-                                // no session with this device, probably because there
-                                // were no one-time keys.
-                                //
-                                // we could send them a to_device message anyway, as a
-                                // signal that they have missed out on the key sharing
-                                // message because of the lack of keys, but there's not
-                                // much point in that really; it will mostly serve to clog
-                                // up to_device inboxes.
-                                //
-                                // ensureOlmSessionsForUsers has already done the logging,
-                                // so just skip it.
-                                continue
-                            }
-                            Timber.v("## shareUserDevicesKey() : Sharing keys with device $userId:$deviceID")
-                            //noinspection ArraysAsListWithZeroOrOneArgument,ArraysAsListWithZeroOrOneArgument
-                            contentMap.setObject(userId, deviceID, messageEncrypter.encryptMessage(payload, Arrays.asList(sessionResult.deviceInfo)))
-                            haveTargets = true
-                        }
-                    }
-                    if (haveTargets) {
-                        t0 = System.currentTimeMillis()
-                        Timber.v("## shareUserDevicesKey() : has target")
-                        val sendToDeviceParams = SendToDeviceTask.Params(EventType.ENCRYPTED, contentMap)
-                        sendToDeviceTask.execute(sendToDeviceParams)
-                                .map {
-                                    Timber.v("## shareUserDevicesKey() : sendToDevice succeeds after "
-                                            + (System.currentTimeMillis() - t0) + " ms")
-
-                                    // Add the devices we have shared with to session.sharedWithDevices.
-                                    // we deliberately iterate over devicesByUser (ie, the devices we
-                                    // attempted to share with) rather than the contentMap (those we did
-                                    // share with), because we don't want to try to claim a one-time-key
-                                    // for dead devices on every message.
-                                    for (userId in devicesByUser.keys) {
-                                        val devicesToShareWith = devicesByUser[userId]
-                                        for ((deviceId) in devicesToShareWith!!) {
-                                            session.sharedWithDevices.setObject(userId, deviceId, chainIndex)
-                                        }
-                                    }
-                                    Unit
-                                }
-                    } else {
-                        Timber.v("## shareUserDevicesKey() : no need to sharekey")
-                        Try.just(Unit)
-                    }
+        val results = ensureOlmSessionsForDevicesAction.handle(devicesByUser)
+        Timber.v("## shareUserDevicesKey() : ensureOlmSessionsForDevices succeeds after "
+                + (System.currentTimeMillis() - t0) + " ms")
+        val contentMap = MXUsersDevicesMap<Any>()
+        var haveTargets = false
+        val userIds = results.userIds
+        for (userId in userIds) {
+            val devicesToShareWith = devicesByUser[userId]
+            for ((deviceID) in devicesToShareWith!!) {
+                val sessionResult = results.getObject(userId, deviceID)
+                if (sessionResult?.sessionId == null) {
+                    // no session with this device, probably because there
+                    // were no one-time keys.
+                    //
+                    // we could send them a to_device message anyway, as a
+                    // signal that they have missed out on the key sharing
+                    // message because of the lack of keys, but there's not
+                    // much point in that really; it will mostly serve to clog
+                    // up to_device inboxes.
+                    //
+                    // ensureOlmSessionsForUsers has already done the logging,
+                    // so just skip it.
+                    continue
                 }
+                Timber.v("## shareUserDevicesKey() : Sharing keys with device $userId:$deviceID")
+                //noinspection ArraysAsListWithZeroOrOneArgument,ArraysAsListWithZeroOrOneArgument
+                contentMap.setObject(userId, deviceID, messageEncrypter.encryptMessage(payload, Arrays.asList(sessionResult.deviceInfo)))
+                haveTargets = true
+            }
+        }
+        if (haveTargets) {
+            t0 = System.currentTimeMillis()
+            Timber.v("## shareUserDevicesKey() : has target")
+            val sendToDeviceParams = SendToDeviceTask.Params(EventType.ENCRYPTED, contentMap)
+            sendToDeviceTask.execute(sendToDeviceParams)
+            Timber.v("## shareUserDevicesKey() : sendToDevice succeeds after "
+                    + (System.currentTimeMillis() - t0) + " ms")
+
+            // Add the devices we have shared with to session.sharedWithDevices.
+            // we deliberately iterate over devicesByUser (ie, the devices we
+            // attempted to share with) rather than the contentMap (those we did
+            // share with), because we don't want to try to claim a one-time-key
+            // for dead devices on every message.
+            for (userId in devicesByUser.keys) {
+                val devicesToShareWith = devicesByUser[userId]
+                for ((deviceId) in devicesToShareWith!!) {
+                    session.sharedWithDevices.setObject(userId, deviceId, chainIndex)
+                }
+            }
+        } else {
+            Timber.v("## shareUserDevicesKey() : no need to sharekey")
+        }
     }
 
     /**
      * process the pending encryptions
      */
-    private fun encryptContent(session: MXOutboundSessionInfo, eventType: String, eventContent: Content): Try<Content> {
-        return Try<Content> {
-            // Everything is in place, encrypt all pending events
-            val payloadJson = HashMap<String, Any>()
-            payloadJson["room_id"] = roomId
-            payloadJson["type"] = eventType
-            payloadJson["content"] = eventContent
+    private fun encryptContent(session: MXOutboundSessionInfo, eventType: String, eventContent: Content): Content {
+        // Everything is in place, encrypt all pending events
+        val payloadJson = HashMap<String, Any>()
+        payloadJson["room_id"] = roomId
+        payloadJson["type"] = eventType
+        payloadJson["content"] = eventContent
 
-            // Get canonical Json from
+        // Get canonical Json from
 
-            val payloadString = convertToUTF8(JsonCanonicalizer.getCanonicalJson(Map::class.java, payloadJson))
-            val ciphertext = olmDevice.encryptGroupMessage(session.sessionId, payloadString!!)
+        val payloadString = convertToUTF8(JsonCanonicalizer.getCanonicalJson(Map::class.java, payloadJson))
+        val ciphertext = olmDevice.encryptGroupMessage(session.sessionId, payloadString!!)
 
-            val map = HashMap<String, Any>()
-            map["algorithm"] = MXCRYPTO_ALGORITHM_MEGOLM
-            map["sender_key"] = olmDevice.deviceCurve25519Key!!
-            map["ciphertext"] = ciphertext!!
-            map["session_id"] = session.sessionId
+        val map = HashMap<String, Any>()
+        map["algorithm"] = MXCRYPTO_ALGORITHM_MEGOLM
+        map["sender_key"] = olmDevice.deviceCurve25519Key!!
+        map["ciphertext"] = ciphertext!!
+        map["session_id"] = session.sessionId
 
-            // Include our device ID so that recipients can send us a
-            // m.new_device message if they don't have our session key.
-            map["device_id"] = credentials.deviceId!!
-            session.useCount++
-            map
-        }
+        // Include our device ID so that recipients can send us a
+        // m.new_device message if they don't have our session key.
+        map["device_id"] = credentials.deviceId!!
+        session.useCount++
+        return map
     }
 
     /**
@@ -287,50 +275,47 @@ internal class MXMegolmEncryption(
      * @param userIds  the user ids whose devices must be checked.
      * @param callback the asynchronous callback
      */
-    private suspend fun getDevicesInRoom(userIds: List<String>): Try<MXUsersDevicesMap<MXDeviceInfo>> {
+    private suspend fun getDevicesInRoom(userIds: List<String>): MXUsersDevicesMap<MXDeviceInfo> {
         // We are happy to use a cached version here: we assume that if we already
         // have a list of the user's devices, then we already share an e2e room
         // with them, which means that they will have announced any new devices via
         // an m.new_device.
-        return deviceListManager
-                .downloadKeys(userIds, false)
-                .flatMap {
-                    val encryptToVerifiedDevicesOnly = cryptoStore.getGlobalBlacklistUnverifiedDevices()
-                            || cryptoStore.getRoomsListBlacklistUnverifiedDevices().contains(roomId)
+        val keys = deviceListManager.downloadKeys(userIds, false)
+        val encryptToVerifiedDevicesOnly = cryptoStore.getGlobalBlacklistUnverifiedDevices()
+                || cryptoStore.getRoomsListBlacklistUnverifiedDevices().contains(roomId)
 
-                    val devicesInRoom = MXUsersDevicesMap<MXDeviceInfo>()
-                    val unknownDevices = MXUsersDevicesMap<MXDeviceInfo>()
+        val devicesInRoom = MXUsersDevicesMap<MXDeviceInfo>()
+        val unknownDevices = MXUsersDevicesMap<MXDeviceInfo>()
 
-                    for (userId in it.userIds) {
-                        val deviceIds = it.getUserDeviceIds(userId) ?: continue
-                        for (deviceId in deviceIds) {
-                            val deviceInfo = it.getObject(userId, deviceId) ?: continue
-                            if (warnOnUnknownDevicesRepository.warnOnUnknownDevices() && deviceInfo.isUnknown) {
-                                // The device is not yet known by the user
-                                unknownDevices.setObject(userId, deviceId, deviceInfo)
-                                continue
-                            }
-                            if (deviceInfo.isBlocked) {
-                                // Remove any blocked devices
-                                continue
-                            }
-
-                            if (!deviceInfo.isVerified && encryptToVerifiedDevicesOnly) {
-                                continue
-                            }
-
-                            if (TextUtils.equals(deviceInfo.identityKey(), olmDevice.deviceCurve25519Key)) {
-                                // Don't bother sending to ourself
-                                continue
-                            }
-                            devicesInRoom.setObject(userId, deviceId, deviceInfo)
-                        }
-                    }
-                    if (unknownDevices.isEmpty) {
-                        Try.just(devicesInRoom)
-                    } else {
-                        Try.Failure(MXCryptoError.UnknownDevice(unknownDevices))
-                    }
+        for (userId in keys.userIds) {
+            val deviceIds = keys.getUserDeviceIds(userId) ?: continue
+            for (deviceId in deviceIds) {
+                val deviceInfo = keys.getObject(userId, deviceId) ?: continue
+                if (warnOnUnknownDevicesRepository.warnOnUnknownDevices() && deviceInfo.isUnknown) {
+                    // The device is not yet known by the user
+                    unknownDevices.setObject(userId, deviceId, deviceInfo)
+                    continue
                 }
+                if (deviceInfo.isBlocked) {
+                    // Remove any blocked devices
+                    continue
+                }
+
+                if (!deviceInfo.isVerified && encryptToVerifiedDevicesOnly) {
+                    continue
+                }
+
+                if (TextUtils.equals(deviceInfo.identityKey(), olmDevice.deviceCurve25519Key)) {
+                    // Don't bother sending to ourself
+                    continue
+                }
+                devicesInRoom.setObject(userId, deviceId, deviceInfo)
+            }
+        }
+        if (unknownDevices.isEmpty) {
+            return devicesInRoom
+        } else {
+            throw MXCryptoError.UnknownDevice(unknownDevices)
+        }
     }
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/algorithms/olm/MXOlmDecryption.kt

@@ -17,7 +17,6 @@
 
 package im.vector.matrix.android.internal.crypto.algorithms.olm
 
-import arrow.core.Try
 import im.vector.matrix.android.api.auth.data.Credentials
 import im.vector.matrix.android.api.session.crypto.MXCryptoError
 import im.vector.matrix.android.api.session.events.model.Event
@@ -41,29 +40,28 @@ internal class MXOlmDecryption(
         private val credentials: Credentials)
     : IMXDecrypting {
 
-    override suspend fun decryptEvent(event: Event, timeline: String): Try<MXEventDecryptionResult> {
+    override suspend fun decryptEvent(event: Event, timeline: String): MXEventDecryptionResult {
         val olmEventContent = event.content.toModel<OlmEventContent>() ?: run {
             Timber.e("## decryptEvent() : bad event format")
-            return Try.Failure(MXCryptoError.Base(MXCryptoError.ErrorType.BAD_EVENT_FORMAT,
-                    MXCryptoError.BAD_EVENT_FORMAT_TEXT_REASON))
+            throw MXCryptoError.Base(MXCryptoError.ErrorType.BAD_EVENT_FORMAT,
+                    MXCryptoError.BAD_EVENT_FORMAT_TEXT_REASON)
         }
 
         val cipherText = olmEventContent.ciphertext ?: run {
             Timber.e("## decryptEvent() : missing cipher text")
-            return Try.Failure(MXCryptoError.Base(MXCryptoError.ErrorType.MISSING_CIPHER_TEXT,
-                    MXCryptoError.MISSING_CIPHER_TEXT_REASON))
+            throw MXCryptoError.Base(MXCryptoError.ErrorType.MISSING_CIPHER_TEXT,
+                    MXCryptoError.MISSING_CIPHER_TEXT_REASON)
         }
 
         val senderKey = olmEventContent.senderKey ?: run {
             Timber.e("## decryptEvent() : missing sender key")
-            return Try.Failure(MXCryptoError.Base(MXCryptoError.ErrorType.MISSING_SENDER_KEY,
-                    MXCryptoError.MISSING_SENDER_KEY_TEXT_REASON))
+            throw MXCryptoError.Base(MXCryptoError.ErrorType.MISSING_SENDER_KEY,
+                    MXCryptoError.MISSING_SENDER_KEY_TEXT_REASON)
         }
 
         val messageAny = cipherText[olmDevice.deviceCurve25519Key] ?: run {
             Timber.e("## decryptEvent() : our device ${olmDevice.deviceCurve25519Key} is not included in recipients")
-            return Try.Failure(MXCryptoError.Base(MXCryptoError.ErrorType.NOT_INCLUDE_IN_RECIPIENTS,
-                    MXCryptoError.NOT_INCLUDED_IN_RECIPIENT_REASON))
+            throw MXCryptoError.Base(MXCryptoError.ErrorType.NOT_INCLUDE_IN_RECIPIENTS, MXCryptoError.NOT_INCLUDED_IN_RECIPIENT_REASON)
         }
 
         // The message for myUser
@@ -73,14 +71,12 @@ internal class MXOlmDecryption(
 
         if (decryptedPayload == null) {
             Timber.e("## decryptEvent() Failed to decrypt Olm event (id= ${event.eventId} from $senderKey")
-            return Try.Failure(MXCryptoError.Base(MXCryptoError.ErrorType.BAD_ENCRYPTED_MESSAGE,
-                    MXCryptoError.BAD_ENCRYPTED_MESSAGE_REASON))
+            throw MXCryptoError.Base(MXCryptoError.ErrorType.BAD_ENCRYPTED_MESSAGE, MXCryptoError.BAD_ENCRYPTED_MESSAGE_REASON)
         }
         val payloadString = convertFromUTF8(decryptedPayload)
         if (payloadString == null) {
             Timber.e("## decryptEvent() Failed to decrypt Olm event (id= ${event.eventId} from $senderKey")
-            return Try.Failure(MXCryptoError.Base(MXCryptoError.ErrorType.BAD_ENCRYPTED_MESSAGE,
-                    MXCryptoError.BAD_ENCRYPTED_MESSAGE_REASON))
+            throw MXCryptoError.Base(MXCryptoError.ErrorType.BAD_ENCRYPTED_MESSAGE, MXCryptoError.BAD_ENCRYPTED_MESSAGE_REASON)
         }
 
         val adapter = MoshiProvider.providesMoshi().adapter<JsonDict>(JSON_DICT_PARAMETERIZED_TYPE)
@@ -88,73 +84,70 @@ internal class MXOlmDecryption(
 
         if (payload == null) {
             Timber.e("## decryptEvent failed : null payload")
-            return Try.Failure(MXCryptoError.Base(MXCryptoError.ErrorType.UNABLE_TO_DECRYPT,
-                    MXCryptoError.MISSING_CIPHER_TEXT_REASON))
+            throw MXCryptoError.Base(MXCryptoError.ErrorType.UNABLE_TO_DECRYPT, MXCryptoError.MISSING_CIPHER_TEXT_REASON)
         }
 
         val olmPayloadContent = OlmPayloadContent.fromJsonString(payloadString) ?: run {
             Timber.e("## decryptEvent() : bad olmPayloadContent format")
-            return Try.Failure(MXCryptoError.Base(MXCryptoError.ErrorType.BAD_DECRYPTED_FORMAT,
-                    MXCryptoError.BAD_DECRYPTED_FORMAT_TEXT_REASON))
+            throw MXCryptoError.Base(MXCryptoError.ErrorType.BAD_DECRYPTED_FORMAT, MXCryptoError.BAD_DECRYPTED_FORMAT_TEXT_REASON)
         }
 
         if (olmPayloadContent.recipient.isNullOrBlank()) {
             val reason = String.format(MXCryptoError.ERROR_MISSING_PROPERTY_REASON, "recipient")
             Timber.e("## decryptEvent() : $reason")
-            return Try.Failure(MXCryptoError.Base(MXCryptoError.ErrorType.MISSING_PROPERTY,
-                    reason))
+            throw MXCryptoError.Base(MXCryptoError.ErrorType.MISSING_PROPERTY, reason)
         }
 
         if (olmPayloadContent.recipient != credentials.userId) {
             Timber.e("## decryptEvent() : Event ${event.eventId}:" +
                     " Intended recipient ${olmPayloadContent.recipient} does not match our id ${credentials.userId}")
-            return Try.Failure(MXCryptoError.Base(MXCryptoError.ErrorType.BAD_RECIPIENT,
-                    String.format(MXCryptoError.BAD_RECIPIENT_REASON, olmPayloadContent.recipient)))
+            throw MXCryptoError.Base(MXCryptoError.ErrorType.BAD_RECIPIENT,
+                    String.format(MXCryptoError.BAD_RECIPIENT_REASON, olmPayloadContent.recipient))
         }
 
         val recipientKeys = olmPayloadContent.recipient_keys ?: run {
             Timber.e("## decryptEvent() : Olm event (id=${event.eventId}) contains no 'recipient_keys' property; cannot prevent unknown-key attack")
-            return Try.Failure(MXCryptoError.Base(MXCryptoError.ErrorType.MISSING_PROPERTY,
-                    String.format(MXCryptoError.ERROR_MISSING_PROPERTY_REASON, "recipient_keys")))
+            throw MXCryptoError.Base(MXCryptoError.ErrorType.MISSING_PROPERTY,
+                    String.format(MXCryptoError.ERROR_MISSING_PROPERTY_REASON, "recipient_keys"))
         }
 
         val ed25519 = recipientKeys["ed25519"]
 
         if (ed25519 != olmDevice.deviceEd25519Key) {
             Timber.e("## decryptEvent() : Event ${event.eventId}: Intended recipient ed25519 key $ed25519 did not match ours")
-            return Try.Failure(MXCryptoError.Base(MXCryptoError.ErrorType.BAD_RECIPIENT_KEY,
-                    MXCryptoError.BAD_RECIPIENT_KEY_REASON))
+            throw MXCryptoError.Base(MXCryptoError.ErrorType.BAD_RECIPIENT_KEY,
+                    MXCryptoError.BAD_RECIPIENT_KEY_REASON)
         }
 
         if (olmPayloadContent.sender.isNullOrBlank()) {
             Timber.e("## decryptEvent() : Olm event (id=${event.eventId}) contains no 'sender' property; cannot prevent unknown-key attack")
-            return Try.Failure(MXCryptoError.Base(MXCryptoError.ErrorType.MISSING_PROPERTY,
-                    String.format(MXCryptoError.ERROR_MISSING_PROPERTY_REASON, "sender")))
+            throw MXCryptoError.Base(MXCryptoError.ErrorType.MISSING_PROPERTY,
+                    String.format(MXCryptoError.ERROR_MISSING_PROPERTY_REASON, "sender"))
         }
 
         if (olmPayloadContent.sender != event.senderId) {
             Timber.e("Event ${event.eventId}: original sender ${olmPayloadContent.sender} does not match reported sender ${event.senderId}")
-            return Try.Failure(MXCryptoError.Base(MXCryptoError.ErrorType.FORWARDED_MESSAGE,
-                    String.format(MXCryptoError.FORWARDED_MESSAGE_REASON, olmPayloadContent.sender)))
+            throw MXCryptoError.Base(MXCryptoError.ErrorType.FORWARDED_MESSAGE,
+                    String.format(MXCryptoError.FORWARDED_MESSAGE_REASON, olmPayloadContent.sender))
         }
 
         if (olmPayloadContent.room_id != event.roomId) {
             Timber.e("## decryptEvent() : Event ${event.eventId}: original room ${olmPayloadContent.room_id} does not match reported room ${event.roomId}")
-            return Try.Failure(MXCryptoError.Base(MXCryptoError.ErrorType.BAD_ROOM,
-                    String.format(MXCryptoError.BAD_ROOM_REASON, olmPayloadContent.room_id)))
+            throw MXCryptoError.Base(MXCryptoError.ErrorType.BAD_ROOM,
+                    String.format(MXCryptoError.BAD_ROOM_REASON, olmPayloadContent.room_id))
         }
 
         val keys = olmPayloadContent.keys ?: run {
             Timber.e("## decryptEvent failed : null keys")
-            return Try.Failure(MXCryptoError.Base(MXCryptoError.ErrorType.UNABLE_TO_DECRYPT,
-                    MXCryptoError.MISSING_CIPHER_TEXT_REASON))
+            throw MXCryptoError.Base(MXCryptoError.ErrorType.UNABLE_TO_DECRYPT,
+                    MXCryptoError.MISSING_CIPHER_TEXT_REASON)
         }
 
-        return Try.just(MXEventDecryptionResult(
+        return MXEventDecryptionResult(
                 clearEvent = payload,
                 senderCurve25519Key = senderKey,
                 claimedEd25519Key = keys["ed25519"]
-        ))
+        )
     }
 
     /**

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/algorithms/olm/MXOlmEncryption.kt

@@ -19,7 +19,6 @@
 package im.vector.matrix.android.internal.crypto.algorithms.olm
 
 import android.text.TextUtils
-import arrow.core.Try
 import im.vector.matrix.android.api.session.events.model.Content
 import im.vector.matrix.android.api.session.events.model.toContent
 import im.vector.matrix.android.internal.crypto.DeviceListManager
@@ -40,37 +39,35 @@ internal class MXOlmEncryption(
         private val ensureOlmSessionsForUsersAction: EnsureOlmSessionsForUsersAction)
     : IMXEncrypting {
 
-    override suspend fun encryptEventContent(eventContent: Content, eventType: String, userIds: List<String>): Try<Content> {
+    override suspend fun encryptEventContent(eventContent: Content, eventType: String, userIds: List<String>): Content {
         // pick the list of recipients based on the membership list.
         //
         // TODO: there is a race condition here! What if a new user turns up
-        return ensureSession(userIds)
-                .map {
-                    val deviceInfos = ArrayList<MXDeviceInfo>()
-                    for (userId in userIds) {
-                        val devices = cryptoStore.getUserDevices(userId)?.values ?: emptyList()
-                        for (device in devices) {
-                            val key = device.identityKey()
-                            if (TextUtils.equals(key, olmDevice.deviceCurve25519Key)) {
-                                // Don't bother setting up session to ourself
-                                continue
-                            }
-                            if (device.isBlocked) {
-                                // Don't bother setting up sessions with blocked users
-                                continue
-                            }
-                            deviceInfos.add(device)
-                        }
-                    }
-
-                    val messageMap = HashMap<String, Any>()
-                    messageMap["room_id"] = roomId
-                    messageMap["type"] = eventType
-                    messageMap["content"] = eventContent
-
-                    messageEncrypter.encryptMessage(messageMap, deviceInfos)
-                    messageMap.toContent()!!
+        ensureSession(userIds)
+        val deviceInfos = ArrayList<MXDeviceInfo>()
+        for (userId in userIds) {
+            val devices = cryptoStore.getUserDevices(userId)?.values ?: emptyList()
+            for (device in devices) {
+                val key = device.identityKey()
+                if (TextUtils.equals(key, olmDevice.deviceCurve25519Key)) {
+                    // Don't bother setting up session to ourself
+                    continue
                 }
+                if (device.isBlocked) {
+                    // Don't bother setting up sessions with blocked users
+                    continue
+                }
+                deviceInfos.add(device)
+            }
+        }
+
+        val messageMap = HashMap<String, Any>()
+        messageMap["room_id"] = roomId
+        messageMap["type"] = eventType
+        messageMap["content"] = eventContent
+
+        messageEncrypter.encryptMessage(messageMap, deviceInfos)
+        return messageMap.toContent()!!
     }
 
 
@@ -78,13 +75,9 @@ internal class MXOlmEncryption(
      * Ensure that the session
      *
      * @param users    the user ids list
-     * @param callback the asynchronous callback
      */
-    private suspend fun ensureSession(users: List<String>): Try<Unit> {
-        return deviceListManager
-                .downloadKeys(users, false)
-                .flatMap { ensureOlmSessionsForUsersAction.handle(users) }
-                .map { Unit }
-
+    private suspend fun ensureSession(users: List<String>) {
+        deviceListManager.downloadKeys(users, false)
+        ensureOlmSessionsForUsersAction.handle(users)
     }
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/keysbackup/KeysBackup.kt

@@ -52,10 +52,6 @@ import im.vector.matrix.android.internal.di.MoshiProvider
 import im.vector.matrix.android.internal.extensions.foldToCallback
 import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.task.*
-import im.vector.matrix.android.internal.task.Task
-import im.vector.matrix.android.internal.task.TaskExecutor
-import im.vector.matrix.android.internal.task.TaskThread
-import im.vector.matrix.android.internal.task.configureWith
 import im.vector.matrix.android.internal.util.JsonCanonicalizer
 import im.vector.matrix.android.internal.util.MatrixCoroutineDispatchers
 import kotlinx.coroutines.GlobalScope
@@ -355,10 +351,8 @@ internal class KeysBackup @Inject constructor(
                                     callback: MatrixCallback<KeysBackupVersionTrust>) {
         // TODO Validate with François that this is correct
         object : Task<KeysVersionResult, KeysBackupVersionTrust> {
-            override suspend fun execute(params: KeysVersionResult): Try<KeysBackupVersionTrust> {
-                return Try {
-                    getKeysBackupTrustBg(params)
-                }
+            override suspend fun execute(params: KeysVersionResult): KeysBackupVersionTrust {
+                return getKeysBackupTrustBg(params)
             }
         }
                 .configureWith(keysBackupVersion)
@@ -454,7 +448,8 @@ internal class KeysBackup @Inject constructor(
                     val myUserId = credentials.userId
 
                     // Get current signatures, or create an empty set
-                    val myUserSignatures = authData.signatures?.get(myUserId)?.toMutableMap() ?: HashMap()
+                    val myUserSignatures = authData.signatures?.get(myUserId)?.toMutableMap()
+                            ?: HashMap()
 
                     if (trust) {
                         // Add current device signature

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/keysbackup/tasks/CreateKeysBackupVersionTask.kt

@@ -16,7 +16,6 @@
 
 package im.vector.matrix.android.internal.crypto.keysbackup.tasks
 
-import arrow.core.Try
 import im.vector.matrix.android.internal.crypto.keysbackup.api.RoomKeysApi
 import im.vector.matrix.android.internal.crypto.keysbackup.model.rest.CreateKeysBackupVersionBody
 import im.vector.matrix.android.internal.crypto.keysbackup.model.rest.KeysVersion
@@ -30,7 +29,7 @@ internal class DefaultCreateKeysBackupVersionTask @Inject constructor(private va
     : CreateKeysBackupVersionTask {
 
 
-    override suspend fun execute(params: CreateKeysBackupVersionBody): Try<KeysVersion> {
+    override suspend fun execute(params: CreateKeysBackupVersionBody): KeysVersion {
         return executeRequest {
             apiCall = roomKeysApi.createKeysBackupVersion(params)
         }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/keysbackup/tasks/DeleteBackupTask.kt

@@ -16,10 +16,8 @@
 
 package im.vector.matrix.android.internal.crypto.keysbackup.tasks
 
-import arrow.core.Try
 import im.vector.matrix.android.internal.crypto.keysbackup.api.RoomKeysApi
 import im.vector.matrix.android.internal.network.executeRequest
-import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.task.Task
 import javax.inject.Inject
 
@@ -33,10 +31,9 @@ internal interface DeleteBackupTask : Task<DeleteBackupTask.Params, Unit> {
 internal class DefaultDeleteBackupTask @Inject constructor(private val roomKeysApi: RoomKeysApi)
     : DeleteBackupTask {
 
-    override suspend fun execute(params: DeleteBackupTask.Params): Try<Unit> {
+    override suspend fun execute(params: DeleteBackupTask.Params) {
         return executeRequest {
-            apiCall = roomKeysApi.deleteBackup(
-                    params.version)
+            apiCall = roomKeysApi.deleteBackup(params.version)
         }
     }
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/keysbackup/tasks/DeleteRoomSessionDataTask.kt

@@ -16,10 +16,8 @@
 
 package im.vector.matrix.android.internal.crypto.keysbackup.tasks
 
-import arrow.core.Try
 import im.vector.matrix.android.internal.crypto.keysbackup.api.RoomKeysApi
 import im.vector.matrix.android.internal.network.executeRequest
-import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.task.Task
 import javax.inject.Inject
 
@@ -34,7 +32,7 @@ internal interface DeleteRoomSessionDataTask : Task<DeleteRoomSessionDataTask.Pa
 internal class DefaultDeleteRoomSessionDataTask @Inject constructor(private val roomKeysApi: RoomKeysApi)
     : DeleteRoomSessionDataTask {
 
-    override suspend fun execute(params: DeleteRoomSessionDataTask.Params): Try<Unit> {
+    override suspend fun execute(params: DeleteRoomSessionDataTask.Params) {
         return executeRequest {
             apiCall = roomKeysApi.deleteRoomSessionData(
                     params.roomId,

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/keysbackup/tasks/DeleteRoomSessionsDataTask.kt

@@ -16,10 +16,8 @@
 
 package im.vector.matrix.android.internal.crypto.keysbackup.tasks
 
-import arrow.core.Try
 import im.vector.matrix.android.internal.crypto.keysbackup.api.RoomKeysApi
 import im.vector.matrix.android.internal.network.executeRequest
-import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.task.Task
 import javax.inject.Inject
 
@@ -33,7 +31,7 @@ internal interface DeleteRoomSessionsDataTask : Task<DeleteRoomSessionsDataTask.
 internal class DefaultDeleteRoomSessionsDataTask @Inject constructor(private val roomKeysApi: RoomKeysApi)
     : DeleteRoomSessionsDataTask {
 
-    override suspend fun execute(params: DeleteRoomSessionsDataTask.Params): Try<Unit> {
+    override suspend fun execute(params: DeleteRoomSessionsDataTask.Params) {
         return executeRequest {
             apiCall = roomKeysApi.deleteRoomSessionsData(
                     params.roomId,

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/keysbackup/tasks/DeleteSessionsDataTask.kt

@@ -16,10 +16,8 @@
 
 package im.vector.matrix.android.internal.crypto.keysbackup.tasks
 
-import arrow.core.Try
 import im.vector.matrix.android.internal.crypto.keysbackup.api.RoomKeysApi
 import im.vector.matrix.android.internal.network.executeRequest
-import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.task.Task
 import javax.inject.Inject
 
@@ -32,10 +30,9 @@ internal interface DeleteSessionsDataTask : Task<DeleteSessionsDataTask.Params,
 internal class DefaultDeleteSessionsDataTask @Inject constructor(private val roomKeysApi: RoomKeysApi)
     : DeleteSessionsDataTask {
 
-    override suspend fun execute(params: DeleteSessionsDataTask.Params): Try<Unit> {
+    override suspend fun execute(params: DeleteSessionsDataTask.Params) {
         return executeRequest {
-            apiCall = roomKeysApi.deleteSessionsData(
-                    params.version)
+            apiCall = roomKeysApi.deleteSessionsData(params.version)
         }
     }
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/keysbackup/tasks/GetKeysBackupLastVersionTask.kt

@@ -16,7 +16,6 @@
 
 package im.vector.matrix.android.internal.crypto.keysbackup.tasks
 
-import arrow.core.Try
 import im.vector.matrix.android.internal.crypto.keysbackup.api.RoomKeysApi
 import im.vector.matrix.android.internal.crypto.keysbackup.model.rest.KeysVersionResult
 import im.vector.matrix.android.internal.network.executeRequest
@@ -29,7 +28,7 @@ internal class DefaultGetKeysBackupLastVersionTask @Inject constructor(private v
     : GetKeysBackupLastVersionTask {
 
 
-    override suspend fun execute(params: Unit): Try<KeysVersionResult> {
+    override suspend fun execute(params: Unit): KeysVersionResult {
         return executeRequest {
             apiCall = roomKeysApi.getKeysBackupLastVersion()
         }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/keysbackup/tasks/GetKeysBackupVersionTask.kt

@@ -16,7 +16,6 @@
 
 package im.vector.matrix.android.internal.crypto.keysbackup.tasks
 
-import arrow.core.Try
 import im.vector.matrix.android.internal.crypto.keysbackup.api.RoomKeysApi
 import im.vector.matrix.android.internal.crypto.keysbackup.model.rest.KeysVersionResult
 import im.vector.matrix.android.internal.network.executeRequest
@@ -29,7 +28,7 @@ internal class DefaultGetKeysBackupVersionTask @Inject constructor(private val r
     : GetKeysBackupVersionTask {
 
 
-    override suspend fun execute(params: String): Try<KeysVersionResult> {
+    override suspend fun execute(params: String): KeysVersionResult {
         return executeRequest {
             apiCall = roomKeysApi.getKeysBackupVersion(params)
         }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/keysbackup/tasks/GetRoomSessionDataTask.kt

@@ -16,11 +16,9 @@
 
 package im.vector.matrix.android.internal.crypto.keysbackup.tasks
 
-import arrow.core.Try
 import im.vector.matrix.android.internal.crypto.keysbackup.api.RoomKeysApi
 import im.vector.matrix.android.internal.crypto.keysbackup.model.rest.KeyBackupData
 import im.vector.matrix.android.internal.network.executeRequest
-import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.task.Task
 import javax.inject.Inject
 
@@ -35,7 +33,7 @@ internal interface GetRoomSessionDataTask : Task<GetRoomSessionDataTask.Params,
 internal class DefaultGetRoomSessionDataTask @Inject constructor(private val roomKeysApi: RoomKeysApi)
     : GetRoomSessionDataTask {
 
-    override suspend fun execute(params: GetRoomSessionDataTask.Params): Try<KeyBackupData> {
+    override suspend fun execute(params: GetRoomSessionDataTask.Params): KeyBackupData {
         return executeRequest {
             apiCall = roomKeysApi.getRoomSessionData(
                     params.roomId,

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/keysbackup/tasks/GetRoomSessionsDataTask.kt

@@ -16,11 +16,9 @@
 
 package im.vector.matrix.android.internal.crypto.keysbackup.tasks
 
-import arrow.core.Try
 import im.vector.matrix.android.internal.crypto.keysbackup.api.RoomKeysApi
 import im.vector.matrix.android.internal.crypto.keysbackup.model.rest.RoomKeysBackupData
 import im.vector.matrix.android.internal.network.executeRequest
-import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.task.Task
 import javax.inject.Inject
 
@@ -35,7 +33,7 @@ internal interface GetRoomSessionsDataTask : Task<GetRoomSessionsDataTask.Params
 internal class DefaultGetRoomSessionsDataTask @Inject constructor(private val roomKeysApi: RoomKeysApi)
     : GetRoomSessionsDataTask {
 
-    override suspend fun execute(params: GetRoomSessionsDataTask.Params): Try<RoomKeysBackupData> {
+    override suspend fun execute(params: GetRoomSessionsDataTask.Params): RoomKeysBackupData {
         return executeRequest {
             apiCall = roomKeysApi.getRoomSessionsData(
                     params.roomId,

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/keysbackup/tasks/GetSessionsDataTask.kt

@@ -16,11 +16,9 @@
 
 package im.vector.matrix.android.internal.crypto.keysbackup.tasks
 
-import arrow.core.Try
 import im.vector.matrix.android.internal.crypto.keysbackup.api.RoomKeysApi
 import im.vector.matrix.android.internal.crypto.keysbackup.model.rest.KeysBackupData
 import im.vector.matrix.android.internal.network.executeRequest
-import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.task.Task
 import javax.inject.Inject
 
@@ -33,10 +31,9 @@ internal interface GetSessionsDataTask : Task<GetSessionsDataTask.Params, KeysBa
 internal class DefaultGetSessionsDataTask @Inject constructor(private val roomKeysApi: RoomKeysApi)
     : GetSessionsDataTask {
 
-    override suspend fun execute(params: GetSessionsDataTask.Params): Try<KeysBackupData> {
+    override suspend fun execute(params: GetSessionsDataTask.Params): KeysBackupData {
         return executeRequest {
-            apiCall = roomKeysApi.getSessionsData(
-                    params.version)
+            apiCall = roomKeysApi.getSessionsData(params.version)
         }
     }
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/keysbackup/tasks/StoreRoomSessionDataTask.kt

@@ -16,12 +16,10 @@
 
 package im.vector.matrix.android.internal.crypto.keysbackup.tasks
 
-import arrow.core.Try
 import im.vector.matrix.android.internal.crypto.keysbackup.api.RoomKeysApi
-import im.vector.matrix.android.internal.crypto.keysbackup.model.rest.KeyBackupData
 import im.vector.matrix.android.internal.crypto.keysbackup.model.rest.BackupKeysResult
+import im.vector.matrix.android.internal.crypto.keysbackup.model.rest.KeyBackupData
 import im.vector.matrix.android.internal.network.executeRequest
-import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.task.Task
 import javax.inject.Inject
 
@@ -37,7 +35,7 @@ internal interface StoreRoomSessionDataTask : Task<StoreRoomSessionDataTask.Para
 internal class DefaultStoreRoomSessionDataTask @Inject constructor(private val roomKeysApi: RoomKeysApi)
     : StoreRoomSessionDataTask {
 
-    override suspend fun execute(params: StoreRoomSessionDataTask.Params): Try<BackupKeysResult> {
+    override suspend fun execute(params: StoreRoomSessionDataTask.Params): BackupKeysResult {
         return executeRequest {
             apiCall = roomKeysApi.storeRoomSessionData(
                     params.roomId,

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/keysbackup/tasks/StoreRoomSessionsDataTask.kt

@@ -16,12 +16,10 @@
 
 package im.vector.matrix.android.internal.crypto.keysbackup.tasks
 
-import arrow.core.Try
 import im.vector.matrix.android.internal.crypto.keysbackup.api.RoomKeysApi
-import im.vector.matrix.android.internal.crypto.keysbackup.model.rest.RoomKeysBackupData
 import im.vector.matrix.android.internal.crypto.keysbackup.model.rest.BackupKeysResult
+import im.vector.matrix.android.internal.crypto.keysbackup.model.rest.RoomKeysBackupData
 import im.vector.matrix.android.internal.network.executeRequest
-import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.task.Task
 import javax.inject.Inject
 
@@ -36,7 +34,7 @@ internal interface StoreRoomSessionsDataTask : Task<StoreRoomSessionsDataTask.Pa
 internal class DefaultStoreRoomSessionsDataTask @Inject constructor(private val roomKeysApi: RoomKeysApi)
     : StoreRoomSessionsDataTask {
 
-    override suspend fun execute(params: StoreRoomSessionsDataTask.Params): Try<BackupKeysResult> {
+    override suspend fun execute(params: StoreRoomSessionsDataTask.Params): BackupKeysResult {
         return executeRequest {
             apiCall = roomKeysApi.storeRoomSessionsData(
                     params.roomId,

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/keysbackup/tasks/StoreSessionsDataTask.kt

@@ -16,12 +16,10 @@
 
 package im.vector.matrix.android.internal.crypto.keysbackup.tasks
 
-import arrow.core.Try
 import im.vector.matrix.android.internal.crypto.keysbackup.api.RoomKeysApi
-import im.vector.matrix.android.internal.crypto.keysbackup.model.rest.KeysBackupData
 import im.vector.matrix.android.internal.crypto.keysbackup.model.rest.BackupKeysResult
+import im.vector.matrix.android.internal.crypto.keysbackup.model.rest.KeysBackupData
 import im.vector.matrix.android.internal.network.executeRequest
-import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.task.Task
 import javax.inject.Inject
 
@@ -35,7 +33,7 @@ internal interface StoreSessionsDataTask : Task<StoreSessionsDataTask.Params, Ba
 internal class DefaultStoreSessionsDataTask @Inject constructor(private val roomKeysApi: RoomKeysApi)
     : StoreSessionsDataTask {
 
-    override suspend fun execute(params: StoreSessionsDataTask.Params): Try<BackupKeysResult> {
+    override suspend fun execute(params: StoreSessionsDataTask.Params): BackupKeysResult {
         return executeRequest {
             apiCall = roomKeysApi.storeSessionsData(
                     params.version,

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/keysbackup/tasks/UpdateKeysBackupVersionTask.kt

@@ -16,7 +16,6 @@
 
 package im.vector.matrix.android.internal.crypto.keysbackup.tasks
 
-import arrow.core.Try
 import im.vector.matrix.android.internal.crypto.keysbackup.api.RoomKeysApi
 import im.vector.matrix.android.internal.crypto.keysbackup.model.rest.UpdateKeysBackupVersionBody
 import im.vector.matrix.android.internal.network.executeRequest
@@ -34,7 +33,7 @@ internal class DefaultUpdateKeysBackupVersionTask @Inject constructor(private va
     : UpdateKeysBackupVersionTask {
 
 
-    override suspend fun execute(params: UpdateKeysBackupVersionTask.Params): Try<Unit> {
+    override suspend fun execute(params: UpdateKeysBackupVersionTask.Params) {
         return executeRequest {
             apiCall = roomKeysApi.updateKeysBackupVersion(params.version, params.keysBackupVersionBody)
         }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/tasks/ClaimOneTimeKeysForUsersDeviceTask.kt

@@ -16,7 +16,6 @@
 
 package im.vector.matrix.android.internal.crypto.tasks
 
-import arrow.core.Try
 import im.vector.matrix.android.internal.crypto.api.CryptoApi
 import im.vector.matrix.android.internal.crypto.model.MXKey
 import im.vector.matrix.android.internal.crypto.model.MXUsersDevicesMap
@@ -37,35 +36,30 @@ internal interface ClaimOneTimeKeysForUsersDeviceTask : Task<ClaimOneTimeKeysFor
 internal class DefaultClaimOneTimeKeysForUsersDevice @Inject constructor(private val cryptoApi: CryptoApi)
     : ClaimOneTimeKeysForUsersDeviceTask {
 
-    override suspend fun execute(params: ClaimOneTimeKeysForUsersDeviceTask.Params): Try<MXUsersDevicesMap<MXKey>> {
+    override suspend fun execute(params: ClaimOneTimeKeysForUsersDeviceTask.Params): MXUsersDevicesMap<MXKey> {
         val body = KeysClaimBody(oneTimeKeys = params.usersDevicesKeyTypesMap.map)
 
-        return executeRequest<KeysClaimResponse> {
+        val keysClaimResponse = executeRequest<KeysClaimResponse> {
             apiCall = cryptoApi.claimOneTimeKeysForUsersDevices(body)
-        }.flatMap { keysClaimResponse ->
-            Try {
-                val map = MXUsersDevicesMap<MXKey>()
+        }
+        val map = MXUsersDevicesMap<MXKey>()
+        keysClaimResponse.oneTimeKeys?.let { oneTimeKeys ->
+            for (userId in oneTimeKeys.keys) {
+                val mapByUserId = oneTimeKeys[userId]
 
-                keysClaimResponse.oneTimeKeys?.let { oneTimeKeys ->
-                    for (userId in oneTimeKeys.keys) {
-                        val mapByUserId = oneTimeKeys[userId]
+                if (mapByUserId != null) {
+                    for (deviceId in mapByUserId.keys) {
+                        val mxKey = MXKey.from(mapByUserId[deviceId])
 
-                        if (mapByUserId != null) {
-                            for (deviceId in mapByUserId.keys) {
-                                val mxKey = MXKey.from(mapByUserId[deviceId])
-
-                                if (mxKey != null) {
-                                    map.setObject(userId, deviceId, mxKey)
-                                } else {
-                                    Timber.e("## claimOneTimeKeysForUsersDevices : fail to create a MXKey")
-                                }
-                            }
+                        if (mxKey != null) {
+                            map.setObject(userId, deviceId, mxKey)
+                        } else {
+                            Timber.e("## claimOneTimeKeysForUsersDevices : fail to create a MXKey")
                         }
                     }
                 }
-
-                map
             }
         }
+        return map
     }
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/tasks/DeleteDeviceTask.kt

@@ -16,16 +16,12 @@
 
 package im.vector.matrix.android.internal.crypto.tasks
 
-import arrow.core.Try
-import arrow.core.failure
-import arrow.core.recoverWith
 import im.vector.matrix.android.api.failure.Failure
 import im.vector.matrix.android.internal.auth.registration.RegistrationFlowResponse
 import im.vector.matrix.android.internal.crypto.api.CryptoApi
 import im.vector.matrix.android.internal.crypto.model.rest.DeleteDeviceParams
 import im.vector.matrix.android.internal.di.MoshiProvider
 import im.vector.matrix.android.internal.network.executeRequest
-import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.task.Task
 import javax.inject.Inject
 
@@ -38,10 +34,12 @@ internal interface DeleteDeviceTask : Task<DeleteDeviceTask.Params, Unit> {
 internal class DefaultDeleteDeviceTask @Inject constructor(private val cryptoApi: CryptoApi)
     : DeleteDeviceTask {
 
-    override suspend fun execute(params: DeleteDeviceTask.Params): Try<Unit> {
-        return executeRequest<Unit> {
-            apiCall = cryptoApi.deleteDevice(params.deviceId, DeleteDeviceParams())
-        }.recoverWith { throwable ->
+    override suspend fun execute(params: DeleteDeviceTask.Params) {
+        try {
+            executeRequest<Unit> {
+                apiCall = cryptoApi.deleteDevice(params.deviceId, DeleteDeviceParams())
+            }
+        } catch (throwable: Throwable) {
             if (throwable is Failure.OtherServerError && throwable.httpCode == 401) {
                 // Parse to get a RegistrationFlowResponse
                 val registrationFlowResponse = try {
@@ -51,17 +49,16 @@ internal class DefaultDeleteDeviceTask @Inject constructor(private val cryptoApi
                 } catch (e: Exception) {
                     null
                 }
-
                 // check if the server response can be casted
                 if (registrationFlowResponse != null) {
-                    Failure.RegistrationFlowError(registrationFlowResponse).failure()
+                    throw Failure.RegistrationFlowError(registrationFlowResponse)
                 } else {
-                    throwable.failure()
+                    throw throwable
                 }
 
             } else {
                 // Other error
-                throwable.failure()
+                throw throwable
             }
         }
     }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/tasks/DeleteDeviceWithUserPasswordTask.kt

@@ -16,7 +16,6 @@
 
 package im.vector.matrix.android.internal.crypto.tasks
 
-import arrow.core.Try
 import im.vector.matrix.android.api.auth.data.Credentials
 import im.vector.matrix.android.internal.auth.data.LoginFlowTypes
 import im.vector.matrix.android.internal.crypto.api.CryptoApi
@@ -38,7 +37,7 @@ internal class DefaultDeleteDeviceWithUserPasswordTask @Inject constructor(priva
                                                                            private val credentials: Credentials)
     : DeleteDeviceWithUserPasswordTask {
 
-    override suspend fun execute(params: DeleteDeviceWithUserPasswordTask.Params): Try<Unit> {
+    override suspend fun execute(params: DeleteDeviceWithUserPasswordTask.Params) {
         return executeRequest {
             apiCall = cryptoApi.deleteDevice(params.deviceId, DeleteDeviceParams()
                     .apply {

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/tasks/DownloadKeysForUsersTask.kt

@@ -17,12 +17,10 @@
 package im.vector.matrix.android.internal.crypto.tasks
 
 import android.text.TextUtils
-import arrow.core.Try
 import im.vector.matrix.android.internal.crypto.api.CryptoApi
 import im.vector.matrix.android.internal.crypto.model.rest.KeysQueryBody
 import im.vector.matrix.android.internal.crypto.model.rest.KeysQueryResponse
 import im.vector.matrix.android.internal.network.executeRequest
-import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.task.Task
 import java.util.*
 import javax.inject.Inject
@@ -38,7 +36,7 @@ internal interface DownloadKeysForUsersTask : Task<DownloadKeysForUsersTask.Para
 internal class DefaultDownloadKeysForUsers @Inject constructor(private val cryptoApi: CryptoApi)
     : DownloadKeysForUsersTask {
 
-    override suspend fun execute(params: DownloadKeysForUsersTask.Params): Try<KeysQueryResponse> {
+    override suspend fun execute(params: DownloadKeysForUsersTask.Params): KeysQueryResponse {
         val downloadQuery = HashMap<String, Map<String, Any>>()
 
         if (null != params.userIds) {

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/tasks/GetDevicesTask.kt

@@ -16,11 +16,9 @@
 
 package im.vector.matrix.android.internal.crypto.tasks
 
-import arrow.core.Try
 import im.vector.matrix.android.internal.crypto.api.CryptoApi
 import im.vector.matrix.android.internal.crypto.model.rest.DevicesListResponse
 import im.vector.matrix.android.internal.network.executeRequest
-import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.task.Task
 import javax.inject.Inject
 
@@ -29,7 +27,7 @@ internal interface GetDevicesTask : Task<Unit, DevicesListResponse>
 internal class DefaultGetDevicesTask @Inject constructor(private val cryptoApi: CryptoApi)
     : GetDevicesTask {
 
-    override suspend fun execute(params: Unit): Try<DevicesListResponse> {
+    override suspend fun execute(params: Unit): DevicesListResponse {
         return executeRequest {
             apiCall = cryptoApi.getDevices()
         }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/tasks/GetKeyChangesTask.kt

@@ -16,11 +16,9 @@
 
 package im.vector.matrix.android.internal.crypto.tasks
 
-import arrow.core.Try
 import im.vector.matrix.android.internal.crypto.api.CryptoApi
 import im.vector.matrix.android.internal.crypto.model.rest.KeyChangesResponse
 import im.vector.matrix.android.internal.network.executeRequest
-import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.task.Task
 import javax.inject.Inject
 
@@ -36,10 +34,9 @@ internal interface GetKeyChangesTask : Task<GetKeyChangesTask.Params, KeyChanges
 internal class DefaultGetKeyChangesTask @Inject constructor(private val cryptoApi: CryptoApi)
     : GetKeyChangesTask {
 
-    override suspend fun execute(params: GetKeyChangesTask.Params): Try<KeyChangesResponse> {
+    override suspend fun execute(params: GetKeyChangesTask.Params): KeyChangesResponse {
         return executeRequest {
-            apiCall = cryptoApi.getKeyChanges(params.from,
-                    params.to)
+            apiCall = cryptoApi.getKeyChanges(params.from, params.to)
         }
     }
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/tasks/SendToDeviceTask.kt

@@ -16,12 +16,10 @@
 
 package im.vector.matrix.android.internal.crypto.tasks
 
-import arrow.core.Try
 import im.vector.matrix.android.internal.crypto.api.CryptoApi
 import im.vector.matrix.android.internal.crypto.model.MXUsersDevicesMap
 import im.vector.matrix.android.internal.crypto.model.rest.SendToDeviceBody
 import im.vector.matrix.android.internal.network.executeRequest
-import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.task.Task
 import java.util.*
 import javax.inject.Inject
@@ -40,7 +38,7 @@ internal interface SendToDeviceTask : Task<SendToDeviceTask.Params, Unit> {
 internal class DefaultSendToDeviceTask @Inject constructor(private val cryptoApi: CryptoApi)
     : SendToDeviceTask {
 
-    override suspend fun execute(params: SendToDeviceTask.Params): Try<Unit> {
+    override suspend fun execute(params: SendToDeviceTask.Params) {
         val sendToDeviceBody = SendToDeviceBody()
         sendToDeviceBody.messages = params.contentMap.map
 

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/tasks/SetDeviceNameTask.kt

@@ -17,11 +17,9 @@
 package im.vector.matrix.android.internal.crypto.tasks
 
 import android.text.TextUtils
-import arrow.core.Try
 import im.vector.matrix.android.internal.crypto.api.CryptoApi
 import im.vector.matrix.android.internal.crypto.model.rest.UpdateDeviceInfoBody
 import im.vector.matrix.android.internal.network.executeRequest
-import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.task.Task
 import javax.inject.Inject
 
@@ -37,11 +35,10 @@ internal interface SetDeviceNameTask : Task<SetDeviceNameTask.Params, Unit> {
 internal class DefaultSetDeviceNameTask @Inject constructor(private val cryptoApi: CryptoApi)
     : SetDeviceNameTask {
 
-    override suspend fun execute(params: SetDeviceNameTask.Params): Try<Unit> {
+    override suspend fun execute(params: SetDeviceNameTask.Params) {
         val body = UpdateDeviceInfoBody(
                 displayName = if (TextUtils.isEmpty(params.deviceName)) "" else params.deviceName
         )
-
         return executeRequest {
             apiCall = cryptoApi.updateDeviceInfo(params.deviceId, body)
         }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/tasks/UploadKeysTask.kt

@@ -16,14 +16,12 @@
 
 package im.vector.matrix.android.internal.crypto.tasks
 
-import arrow.core.Try
 import im.vector.matrix.android.api.util.JsonDict
 import im.vector.matrix.android.internal.crypto.api.CryptoApi
-import im.vector.matrix.android.internal.crypto.model.rest.KeysUploadResponse
 import im.vector.matrix.android.internal.crypto.model.rest.DeviceKeys
 import im.vector.matrix.android.internal.crypto.model.rest.KeysUploadBody
+import im.vector.matrix.android.internal.crypto.model.rest.KeysUploadResponse
 import im.vector.matrix.android.internal.network.executeRequest
-import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.task.Task
 import im.vector.matrix.android.internal.util.convertToUTF8
 import javax.inject.Inject
@@ -41,7 +39,7 @@ internal interface UploadKeysTask : Task<UploadKeysTask.Params, KeysUploadRespon
 internal class DefaultUploadKeysTask @Inject constructor(private val cryptoApi: CryptoApi)
     : UploadKeysTask {
 
-    override suspend fun execute(params: UploadKeysTask.Params): Try<KeysUploadResponse> {
+    override suspend fun execute(params: UploadKeysTask.Params): KeysUploadResponse {
         val encodedDeviceId = convertToUTF8(params.deviceId)
 
         val body = KeysUploadBody()

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/DefaultSasVerificationService.kt

@@ -219,17 +219,20 @@ internal class DefaultSasVerificationService @Inject constructor(private val cre
                                                startReq: KeyVerificationStart,
                                                success: (MXUsersDevicesMap<MXDeviceInfo>) -> Unit,
                                                error: () -> Unit) {
-        deviceListManager.downloadKeys(listOf(otherUserId), true)
-                .fold(
-                        { error() },
-                        {
-                            if (it.getUserDeviceIds(otherUserId)?.contains(startReq.fromDevice) == true) {
-                                success(it)
-                            } else {
-                                error()
-                            }
-                        }
-                )
+        runCatching {
+            deviceListManager.downloadKeys(listOf(otherUserId), true)
+        }.fold(
+                {
+                    if (it.getUserDeviceIds(otherUserId)?.contains(startReq.fromDevice) == true) {
+                        success(it)
+                    } else {
+                        error()
+                    }
+                },
+                {
+                    error()
+                }
+        )
     }
 
     private suspend fun onCancelReceived(event: Event) {

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/database/RealmExtensions.kt

@@ -0,0 +1,46 @@
+/*
+  * Copyright 2019 New Vector Ltd
+  *
+  * 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 im.vector.matrix.android.internal.database
+
+import io.realm.Realm
+import kotlinx.coroutines.suspendCancellableCoroutine
+import timber.log.Timber
+import kotlin.coroutines.resume
+import kotlin.coroutines.resumeWithException
+
+
+suspend fun Realm.awaitTransaction(transaction: (realm: Realm) -> Unit) {
+    return suspendCancellableCoroutine { continuation ->
+        beginTransaction()
+        try {
+            transaction(this)
+            commitTransaction()
+            continuation.resume(Unit)
+        } catch (e: Throwable) {
+            if (isInTransaction) {
+                cancelTransaction()
+            } else {
+                Timber.w("Could not cancel transaction, not currently in a transaction.")
+            }
+            continuation.resumeWithException(e)
+        }
+        continuation.invokeOnCancellation {
+            if (isInTransaction) {
+                cancelTransaction()
+            }
+        }
+    }
+}

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/extensions/Result.kt

@@ -0,0 +1,25 @@
+/*
+
+  * Copyright 2019 New Vector Ltd
+  *
+  * 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 im.vector.matrix.android.internal.extensions
+
+import im.vector.matrix.android.api.MatrixCallback
+
+fun <A> Result<A>.foldToCallback(callback: MatrixCallback<A>): Unit = fold(
+        { callback.onSuccess(it) },
+        { callback.onFailure(it) }
+)

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/network/Request.kt

@@ -16,9 +16,6 @@
 
 package im.vector.matrix.android.internal.network
 
-import arrow.core.Try
-import arrow.core.failure
-import arrow.core.recoverWith
 import com.squareup.moshi.JsonDataException
 import com.squareup.moshi.Moshi
 import im.vector.matrix.android.api.failure.Failure
@@ -36,8 +33,8 @@ internal class Request<DATA> {
     private val moshi: Moshi = MoshiProvider.providesMoshi()
     lateinit var apiCall: Call<DATA>
 
-    suspend fun execute(): Try<DATA> {
-        return Try {
+    suspend fun execute(): DATA {
+        return try {
             val response = apiCall.awaitResponse()
             if (response.isSuccessful) {
                 response.body()
@@ -45,13 +42,13 @@ internal class Request<DATA> {
             } else {
                 throw manageFailure(response.errorBody(), response.code())
             }
-        }.recoverWith {
-            when (it) {
-                is IOException              -> Failure.NetworkConnection(it)
+        } catch (exception: Throwable) {
+            throw when (exception) {
+                is IOException              -> Failure.NetworkConnection(exception)
                 is Failure.ServerError,
-                is Failure.OtherServerError -> it
-                else                        -> Failure.Unknown(it)
-            }.failure()
+                is Failure.OtherServerError -> exception
+                else                        -> Failure.Unknown(exception)
+            }
         }
     }
 

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/DefaultSession.kt

@@ -47,6 +47,7 @@ import im.vector.matrix.android.internal.session.sync.job.SyncWorker
 import im.vector.matrix.android.internal.worker.WorkManagerUtil
 import timber.log.Timber
 import javax.inject.Inject
+import javax.inject.Provider
 
 @SessionScope
 internal class DefaultSession @Inject constructor(override val sessionParams: SessionParams,
@@ -64,7 +65,7 @@ internal class DefaultSession @Inject constructor(override val sessionParams: Se
                                                   private val pushersService: Lazy<PushersService>,
                                                   private val cryptoService: Lazy<CryptoManager>,
                                                   private val fileService: Lazy<FileService>,
-                                                  private val syncThread: SyncThread,
+                                                  private val syncThreadProvider: Provider<SyncThread>,
                                                   private val contentUrlResolver: ContentUrlResolver,
                                                   private val contentUploadProgressTracker: ContentUploadStateTracker,
                                                   private val initialSyncProgressService: Lazy<InitialSyncProgressService>)
@@ -84,6 +85,7 @@ internal class DefaultSession @Inject constructor(override val sessionParams: Se
 
     private var isOpen = false
 
+    private var syncThread: SyncThread? = null
 
     @MainThread
     override fun open() {
@@ -105,21 +107,23 @@ internal class DefaultSession @Inject constructor(override val sessionParams: Se
         SyncWorker.stopAnyBackgroundSync(context)
     }
 
-    override fun startSync(fromForeground : Boolean) {
+    override fun startSync(fromForeground: Boolean) {
         Timber.i("Starting sync thread")
         assert(isOpen)
-        syncThread.setInitialForeground(fromForeground)
-        if (!syncThread.isAlive) {
-            syncThread.start()
+        val localSyncThread = getSyncThread()
+        localSyncThread.setInitialForeground(fromForeground)
+        if (!localSyncThread.isAlive) {
+            localSyncThread.start()
         } else {
-            syncThread.restart()
+            localSyncThread.restart()
             Timber.w("Attempt to start an already started thread")
         }
     }
 
     override fun stopSync() {
         assert(isOpen)
-        syncThread.kill()
+        syncThread?.kill()
+        syncThread = null
     }
 
     override fun close() {
@@ -131,7 +135,13 @@ internal class DefaultSession @Inject constructor(override val sessionParams: Se
     }
 
     override fun syncState(): LiveData<SyncState> {
-        return syncThread.liveState()
+        return getSyncThread().liveState()
+    }
+
+    private fun getSyncThread(): SyncThread {
+        return syncThread ?: syncThreadProvider.get().also {
+            syncThread = it
+        }
     }
 
     @MainThread
@@ -172,6 +182,22 @@ internal class DefaultSession @Inject constructor(override val sessionParams: Se
         })
     }
 
+    override fun clearCache(callback: MatrixCallback<Unit>) {
+        stopSync()
+        stopAnyBackgroundSync()
+        cacheService.get().clearCache(object : MatrixCallback<Unit> {
+            override fun onSuccess(data: Unit) {
+                startSync(true)
+                callback.onSuccess(data)
+            }
+
+            override fun onFailure(failure: Throwable) {
+                startSync(true)
+                callback.onFailure(failure)
+            }
+        })
+    }
+
     override fun contentUrlResolver() = contentUrlResolver
 
     override fun contentUploadProgressTracker() = contentUploadProgressTracker

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/cache/ClearCacheTask.kt

@@ -16,27 +16,21 @@
 
 package im.vector.matrix.android.internal.session.cache
 
-import arrow.core.Try
-import im.vector.matrix.android.internal.session.SessionScope
+import im.vector.matrix.android.internal.database.awaitTransaction
 import im.vector.matrix.android.internal.task.Task
 import io.realm.Realm
 import io.realm.RealmConfiguration
 import javax.inject.Inject
-import javax.inject.Named
 
 internal interface ClearCacheTask : Task<Unit, Unit>
 
 internal class RealmClearCacheTask @Inject constructor(private val realmConfiguration: RealmConfiguration) : ClearCacheTask {
 
-    override suspend fun execute(params: Unit): Try<Unit> {
-        return Try {
-            val realm = Realm.getInstance(realmConfiguration)
-
-            realm.executeTransaction {
-                it.deleteAll()
-            }
-
-            realm.close()
+    override suspend fun execute(params: Unit) {
+        val realm = Realm.getInstance(realmConfiguration)
+        realm.awaitTransaction {
+            it.deleteAll()
         }
+        realm.close()
     }
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/cache/DefaultCacheService.kt

@@ -23,10 +23,12 @@ import im.vector.matrix.android.internal.task.TaskExecutor
 import im.vector.matrix.android.internal.task.toConfigurableTask
 import javax.inject.Inject
 
-internal class DefaultCacheService @Inject constructor(@SessionDatabase private val clearCacheTask: ClearCacheTask,
+internal class DefaultCacheService @Inject constructor(@SessionDatabase
+                                                       private val clearCacheTask: ClearCacheTask,
                                                        private val taskExecutor: TaskExecutor) : CacheService {
 
     override fun clearCache(callback: MatrixCallback<Unit>) {
+        taskExecutor.cancelAll()
         clearCacheTask
                 .toConfigurableTask()
                 .dispatchTo(callback)

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/filter/DefaultSaveFilterTask.kt

@@ -16,7 +16,6 @@
 
 package im.vector.matrix.android.internal.session.filter
 
-import arrow.core.Try
 import im.vector.matrix.android.api.auth.data.SessionParams
 import im.vector.matrix.android.internal.network.executeRequest
 import im.vector.matrix.android.internal.task.Task
@@ -39,15 +38,12 @@ internal class DefaultSaveFilterTask @Inject constructor(private val sessionPara
                                                          private val filterRepository: FilterRepository
 ) : SaveFilterTask {
 
-    override suspend fun execute(params: SaveFilterTask.Params): Try<Unit> {
-        return executeRequest<FilterResponse> {
+    override suspend fun execute(params: SaveFilterTask.Params) {
+        val filterResponse = executeRequest<FilterResponse> {
             // TODO auto retry
             apiCall = filterAPI.uploadFilter(sessionParams.credentials.userId, params.filter)
-        }.flatMap { filterResponse ->
-            Try {
-                filterRepository.storeFilterId(params.filter, filterResponse.filterId)
-            }
         }
+        filterRepository.storeFilterId(params.filter, filterResponse.filterId)
     }
 
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/group/DefaultGetGroupDataTask.kt

@@ -16,10 +16,6 @@
 
 package im.vector.matrix.android.internal.session.group
 
-import arrow.core.Try
-import arrow.core.fix
-import arrow.instances.`try`.monad.monad
-import arrow.typeclasses.binding
 import com.zhuinden.monarchy.Monarchy
 import im.vector.matrix.android.internal.database.model.GroupSummaryEntity
 import im.vector.matrix.android.internal.database.query.where
@@ -28,8 +24,6 @@ import im.vector.matrix.android.internal.session.group.model.GroupRooms
 import im.vector.matrix.android.internal.session.group.model.GroupSummaryResponse
 import im.vector.matrix.android.internal.session.group.model.GroupUsers
 import im.vector.matrix.android.internal.task.Task
-import im.vector.matrix.android.internal.util.tryTransactionSync
-import io.realm.kotlin.createObject
 import javax.inject.Inject
 
 internal interface GetGroupDataTask : Task<GetGroupDataTask.Params, Unit> {
@@ -43,7 +37,7 @@ internal class DefaultGetGroupDataTask @Inject constructor(
         private val monarchy: Monarchy
 ) : GetGroupDataTask {
 
-    override suspend fun execute(params: GetGroupDataTask.Params): Try<Unit> {
+    override suspend fun execute(params: GetGroupDataTask.Params) {
         val groupId = params.groupId
         val groupSummary = executeRequest<GroupSummaryResponse> {
             apiCall = groupAPI.getSummary(groupId)
@@ -54,20 +48,18 @@ internal class DefaultGetGroupDataTask @Inject constructor(
         val groupUsers = executeRequest<GroupUsers> {
             apiCall = groupAPI.getUsers(groupId)
         }
-        return Try.monad().binding {
-            insertInDb(groupSummary.bind(), groupRooms.bind(), groupUsers.bind(), groupId).bind()
-        }.fix()
+        insertInDb(groupSummary, groupRooms, groupUsers, groupId)
     }
 
 
     private fun insertInDb(groupSummary: GroupSummaryResponse,
                            groupRooms: GroupRooms,
                            groupUsers: GroupUsers,
-                           groupId: String): Try<Unit> {
-        return monarchy
-                .tryTransactionSync { realm ->
+                           groupId: String) {
+        monarchy
+                .writeAsync { realm ->
                     val groupSummaryEntity = GroupSummaryEntity.where(realm, groupId).findFirst()
-                            ?: realm.createObject(groupId)
+                            ?: realm.createObject(GroupSummaryEntity::class.java, groupId)
 
                     groupSummaryEntity.avatarUrl = groupSummary.profile?.avatarUrl ?: ""
                     val name = groupSummary.profile?.name
@@ -82,7 +74,6 @@ internal class DefaultGetGroupDataTask @Inject constructor(
                     val userIds = groupUsers.users.map { it.userId }
                     groupSummaryEntity.userIds.clear()
                     groupSummaryEntity.userIds.addAll(userIds)
-
                 }
     }
 

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/group/GetGroupDataWorker.kt

@@ -19,7 +19,6 @@ package im.vector.matrix.android.internal.session.group
 import android.content.Context
 import androidx.work.CoroutineWorker
 import androidx.work.WorkerParameters
-import arrow.core.Try
 import com.squareup.moshi.JsonClass
 import im.vector.matrix.android.internal.worker.SessionWorkerParams
 import im.vector.matrix.android.internal.worker.WorkerParamsFactory
@@ -43,16 +42,15 @@ internal class GetGroupDataWorker(context: Context, params: WorkerParameters) :
 
         val sessionComponent = getSessionComponent(params.userId) ?: return Result.success()
         sessionComponent.inject(this)
-
         val results = params.groupIds.map { groupId ->
-            fetchGroupData(groupId)
+            runCatching { fetchGroupData(groupId) }
         }
-        val isSuccessful = results.none { it.isFailure() }
+        val isSuccessful = results.none { it.isFailure }
         return if (isSuccessful) Result.success() else Result.retry()
     }
 
-    private suspend fun fetchGroupData(groupId: String): Try<Unit> {
-        return getGroupDataTask.execute(GetGroupDataTask.Params(groupId))
+    private suspend fun fetchGroupData(groupId: String) {
+        getGroupDataTask.execute(GetGroupDataTask.Params(groupId))
     }
 
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/notification/ProcessEventForPushTask.kt

@@ -16,7 +16,6 @@
 
 package im.vector.matrix.android.internal.session.notification
 
-import arrow.core.Try
 import im.vector.matrix.android.api.auth.data.SessionParams
 import im.vector.matrix.android.api.pushrules.rest.PushRule
 import im.vector.matrix.android.api.session.events.model.Event
@@ -41,48 +40,45 @@ internal class DefaultProcessEventForPushTask @Inject constructor(
         private val sessionParams: SessionParams
 ) : ProcessEventForPushTask {
 
-
-    override suspend fun execute(params: ProcessEventForPushTask.Params): Try<Unit> {
-        return Try {
-            // Handle left rooms
-            params.syncResponse.leave.keys.forEach {
-                defaultPushRuleService.dispatchRoomLeft(it)
-            }
-            val newJoinEvents = params.syncResponse.join
-                    .map { entries ->
-                        entries.value.timeline?.events?.map { it.copy(roomId = entries.key) }
-                    }
-                    .fold(emptyList<Event>(), { acc, next ->
-                        acc + (next ?: emptyList())
-                    })
-            val inviteEvents = params.syncResponse.invite
-                    .map { entries ->
-                        entries.value.inviteState?.events?.map { it.copy(roomId = entries.key) }
-                    }
-                    .fold(emptyList<Event>(), { acc, next ->
-                        acc + (next ?: emptyList())
-                    })
-            val allEvents = (newJoinEvents + inviteEvents).filter { event ->
-                when (event.type) {
-                    EventType.MESSAGE,
-                    EventType.REDACTION,
-                    EventType.ENCRYPTED,
-                    EventType.STATE_ROOM_MEMBER -> true
-                    else                        -> false
-                }
-            }.filter {
-                it.senderId != sessionParams.credentials.userId
-            }
-            Timber.v("[PushRules] Found ${allEvents.size} out of ${(newJoinEvents + inviteEvents).size}" +
-                    " to check for push rules with ${params.rules.size} rules")
-            allEvents.forEach { event ->
-                fulfilledBingRule(event, params.rules)?.let {
-                    Timber.v("[PushRules] Rule $it match for event ${event.eventId}")
-                    defaultPushRuleService.dispatchBing(event, it)
-                }
-            }
-            defaultPushRuleService.dispatchFinish()
+    override suspend fun execute(params: ProcessEventForPushTask.Params) {
+        // Handle left rooms
+        params.syncResponse.leave.keys.forEach {
+            defaultPushRuleService.dispatchRoomLeft(it)
         }
+        val newJoinEvents = params.syncResponse.join
+                .map { entries ->
+                    entries.value.timeline?.events?.map { it.copy(roomId = entries.key) }
+                }
+                .fold(emptyList<Event>(), { acc, next ->
+                    acc + (next ?: emptyList())
+                })
+        val inviteEvents = params.syncResponse.invite
+                .map { entries ->
+                    entries.value.inviteState?.events?.map { it.copy(roomId = entries.key) }
+                }
+                .fold(emptyList<Event>(), { acc, next ->
+                    acc + (next ?: emptyList())
+                })
+        val allEvents = (newJoinEvents + inviteEvents).filter { event ->
+            when (event.type) {
+                EventType.MESSAGE,
+                EventType.REDACTION,
+                EventType.ENCRYPTED,
+                EventType.STATE_ROOM_MEMBER -> true
+                else                        -> false
+            }
+        }.filter {
+            it.senderId != sessionParams.credentials.userId
+        }
+        Timber.v("[PushRules] Found ${allEvents.size} out of ${(newJoinEvents + inviteEvents).size}" +
+                " to check for push rules with ${params.rules.size} rules")
+        allEvents.forEach { event ->
+            fulfilledBingRule(event, params.rules)?.let {
+                Timber.v("[PushRules] Rule $it match for event ${event.eventId}")
+                defaultPushRuleService.dispatchBing(event, it)
+            }
+        }
+        defaultPushRuleService.dispatchFinish()
     }
 
     private fun fulfilledBingRule(event: Event, rules: List<PushRule>): PushRule? {

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/pushers/AddHttpPusherWorker.kt

@@ -26,6 +26,7 @@ import im.vector.matrix.android.internal.database.mapper.toEntity
 import im.vector.matrix.android.internal.database.model.PusherEntity
 import im.vector.matrix.android.internal.database.query.where
 import im.vector.matrix.android.internal.network.executeRequest
+import im.vector.matrix.android.internal.util.awaitTransaction
 import im.vector.matrix.android.internal.worker.WorkerParamsFactory
 import im.vector.matrix.android.internal.worker.getSessionComponent
 import javax.inject.Inject
@@ -55,15 +56,14 @@ internal class AddHttpPusherWorker(context: Context, params: WorkerParameters)
         if (pusher.pushKey.isBlank()) {
             return Result.failure()
         }
-
-        val result = executeRequest<Unit> {
-            apiCall = pushersAPI.setPusher(pusher)
-        }
-        return result.fold({
-            when (it) {
+        return try {
+            setPusher(pusher, params.userId)
+            Result.success()
+        } catch (exception: Throwable) {
+            when (exception) {
                 is Failure.NetworkConnection -> Result.retry()
                 else                         -> {
-                    monarchy.runTransactionSync { realm ->
+                    monarchy.awaitTransaction { realm ->
                         PusherEntity.where(realm, params.userId, pusher.pushKey).findFirst()?.let {
                             //update it
                             it.state = PusherState.FAILED_TO_REGISTER
@@ -73,28 +73,31 @@ internal class AddHttpPusherWorker(context: Context, params: WorkerParameters)
                     Result.failure()
                 }
             }
-        }, {
-            monarchy.runTransactionSync { realm ->
-                val echo = PusherEntity.where(realm, params.userId, pusher.pushKey).findFirst()
-                if (echo != null) {
-                    //update it
-                    echo.appDisplayName = pusher.appDisplayName
-                    echo.appId = pusher.appId
-                    echo.kind = pusher.kind
-                    echo.lang = pusher.lang
-                    echo.profileTag = pusher.profileTag
-                    echo.data?.format = pusher.data?.format
-                    echo.data?.url = pusher.data?.url
-                    echo.state = PusherState.REGISTERED
-                } else {
-                    pusher.toEntity(params.userId).also {
-                        it.state = PusherState.REGISTERED
-                        realm.insertOrUpdate(it)
-                    }
+        }
+    }
+
+    private suspend fun setPusher(pusher: JsonPusher, userId: String) {
+        executeRequest<Unit> {
+            apiCall = pushersAPI.setPusher(pusher)
+        }
+        monarchy.awaitTransaction { realm ->
+            val echo = PusherEntity.where(realm, userId, pusher.pushKey).findFirst()
+            if (echo != null) {
+                //update it
+                echo.appDisplayName = pusher.appDisplayName
+                echo.appId = pusher.appId
+                echo.kind = pusher.kind
+                echo.lang = pusher.lang
+                echo.profileTag = pusher.profileTag
+                echo.data?.format = pusher.data?.format
+                echo.data?.url = pusher.data?.url
+                echo.state = PusherState.REGISTERED
+            } else {
+                pusher.toEntity(userId).also {
+                    it.state = PusherState.REGISTERED
+                    realm.insertOrUpdate(it)
                 }
             }
-            Result.success()
-
-        })
+        }
     }
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/pushers/GetPushRulesTask.kt

@@ -15,7 +15,6 @@
  */
 package im.vector.matrix.android.internal.session.pushers
 
-import arrow.core.Try
 import com.zhuinden.monarchy.Monarchy
 import im.vector.matrix.android.api.auth.data.SessionParams
 import im.vector.matrix.android.api.pushrules.rest.GetPushRulesResponse
@@ -24,7 +23,7 @@ import im.vector.matrix.android.internal.database.model.PushRulesEntity
 import im.vector.matrix.android.internal.database.model.PusherEntityFields
 import im.vector.matrix.android.internal.network.executeRequest
 import im.vector.matrix.android.internal.task.Task
-import im.vector.matrix.android.internal.util.tryTransactionSync
+import im.vector.matrix.android.internal.util.awaitTransaction
 import javax.inject.Inject
 
 
@@ -39,58 +38,57 @@ internal class DefaultGetPushRulesTask @Inject constructor(private val pushRules
                                                            private val monarchy: Monarchy,
                                                            private val sessionParams: SessionParams) : GetPushRulesTask {
 
-    override suspend fun execute(params: GetPushRulesTask.Params): Try<Unit> {
-        return executeRequest<GetPushRulesResponse> {
+    override suspend fun execute(params: GetPushRulesTask.Params) {
+        val response = executeRequest<GetPushRulesResponse> {
             apiCall = pushRulesApi.getAllRules()
-        }.flatMap { response ->
-            val scope = params.scope
-            return monarchy.tryTransactionSync { realm ->
-                //clear existings?
-                //TODO
-                realm.where(PushRulesEntity::class.java)
-                        .equalTo(PusherEntityFields.USER_ID, sessionParams.credentials.userId)
-                        .findAll().deleteAllFromRealm()
+        }
+        val scope = params.scope
+        monarchy.awaitTransaction { realm ->
+            //clear existings?
+            //TODO
+            realm.where(PushRulesEntity::class.java)
+                    .equalTo(PusherEntityFields.USER_ID, sessionParams.credentials.userId)
+                    .findAll().deleteAllFromRealm()
 
-                val content = PushRulesEntity(sessionParams.credentials.userId, scope, "content")
-                response.global.content?.forEach { rule ->
-                    PushRulesMapper.map(rule).also {
-                        content.pushRules.add(it)
-                    }
+            val content = PushRulesEntity(sessionParams.credentials.userId, scope, "content")
+            response.global.content?.forEach { rule ->
+                PushRulesMapper.map(rule).also {
+                    content.pushRules.add(it)
                 }
-                realm.insertOrUpdate(content)
-
-                val override = PushRulesEntity(sessionParams.credentials.userId, scope, "override")
-                response.global.override?.forEach { rule ->
-                    PushRulesMapper.map(rule).also {
-                        override.pushRules.add(it)
-                    }
-                }
-                realm.insertOrUpdate(override)
-
-                val rooms = PushRulesEntity(sessionParams.credentials.userId, scope, "room")
-                response.global.room?.forEach { rule ->
-                    PushRulesMapper.map(rule).also {
-                        rooms.pushRules.add(it)
-                    }
-                }
-                realm.insertOrUpdate(rooms)
-
-                val senders = PushRulesEntity(sessionParams.credentials.userId, scope, "sender")
-                response.global.sender?.forEach { rule ->
-                    PushRulesMapper.map(rule).also {
-                        senders.pushRules.add(it)
-                    }
-                }
-                realm.insertOrUpdate(senders)
-
-                val underrides = PushRulesEntity(sessionParams.credentials.userId, scope, "underride")
-                response.global.underride?.forEach { rule ->
-                    PushRulesMapper.map(rule).also {
-                        underrides.pushRules.add(it)
-                    }
-                }
-                realm.insertOrUpdate(underrides)
             }
+            realm.insertOrUpdate(content)
+
+            val override = PushRulesEntity(sessionParams.credentials.userId, scope, "override")
+            response.global.override?.forEach { rule ->
+                PushRulesMapper.map(rule).also {
+                    override.pushRules.add(it)
+                }
+            }
+            realm.insertOrUpdate(override)
+
+            val rooms = PushRulesEntity(sessionParams.credentials.userId, scope, "room")
+            response.global.room?.forEach { rule ->
+                PushRulesMapper.map(rule).also {
+                    rooms.pushRules.add(it)
+                }
+            }
+            realm.insertOrUpdate(rooms)
+
+            val senders = PushRulesEntity(sessionParams.credentials.userId, scope, "sender")
+            response.global.sender?.forEach { rule ->
+                PushRulesMapper.map(rule).also {
+                    senders.pushRules.add(it)
+                }
+            }
+            realm.insertOrUpdate(senders)
+
+            val underrides = PushRulesEntity(sessionParams.credentials.userId, scope, "underride")
+            response.global.underride?.forEach { rule ->
+                PushRulesMapper.map(rule).also {
+                    underrides.pushRules.add(it)
+                }
+            }
+            realm.insertOrUpdate(underrides)
         }
     }
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/pushers/GetPushersTask.kt

@@ -15,7 +15,6 @@
  */
 package im.vector.matrix.android.internal.session.pushers
 
-import arrow.core.Try
 import com.zhuinden.monarchy.Monarchy
 import im.vector.matrix.android.api.auth.data.SessionParams
 import im.vector.matrix.android.api.session.pushers.PusherState
@@ -24,7 +23,7 @@ import im.vector.matrix.android.internal.database.model.PusherEntity
 import im.vector.matrix.android.internal.database.model.PusherEntityFields
 import im.vector.matrix.android.internal.network.executeRequest
 import im.vector.matrix.android.internal.task.Task
-import im.vector.matrix.android.internal.util.tryTransactionSync
+import im.vector.matrix.android.internal.util.awaitTransaction
 import javax.inject.Inject
 
 internal interface GetPushersTask : Task<Unit, Unit>
@@ -33,20 +32,19 @@ internal class DefaultGetPusherTask @Inject constructor(private val pushersAPI:
                                                         private val monarchy: Monarchy,
                                                         private val sessionParams: SessionParams) : GetPushersTask {
 
-    override suspend fun execute(params: Unit): Try<Unit> {
-        return executeRequest<GetPushersResponse> {
+    override suspend fun execute(params: Unit) {
+        val response = executeRequest<GetPushersResponse> {
             apiCall = pushersAPI.getPushers()
-        }.flatMap { response ->
-            monarchy.tryTransactionSync { realm ->
-                //clear existings?
-                realm.where(PusherEntity::class.java)
-                        .equalTo(PusherEntityFields.USER_ID, sessionParams.credentials.userId)
-                        .findAll().deleteAllFromRealm()
-                response.pushers?.forEach { jsonPusher ->
-                    jsonPusher.toEntity(sessionParams.credentials.userId).also {
-                        it.state = PusherState.REGISTERED
-                        realm.insertOrUpdate(it)
-                    }
+        }
+        monarchy.awaitTransaction { realm ->
+            //clear existings?
+            realm.where(PusherEntity::class.java)
+                    .equalTo(PusherEntityFields.USER_ID, sessionParams.credentials.userId)
+                    .findAll().deleteAllFromRealm()
+            response.pushers?.forEach { jsonPusher ->
+                jsonPusher.toEntity(sessionParams.credentials.userId).also {
+                    it.state = PusherState.REGISTERED
+                    realm.insertOrUpdate(it)
                 }
             }
         }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/pushers/RemovePusherTask.kt

@@ -16,16 +16,16 @@
 
 package im.vector.matrix.android.internal.session.pushers
 
-import arrow.core.Try
 import com.zhuinden.monarchy.Monarchy
-import im.vector.matrix.android.api.session.pushers.Pusher
 import im.vector.matrix.android.api.session.pushers.PusherState
+import im.vector.matrix.android.internal.database.awaitTransaction
 import im.vector.matrix.android.internal.database.mapper.asDomain
 import im.vector.matrix.android.internal.database.model.PusherEntity
 import im.vector.matrix.android.internal.database.query.where
 import im.vector.matrix.android.internal.network.executeRequest
 import im.vector.matrix.android.internal.task.Task
-import im.vector.matrix.android.internal.util.tryTransactionSync
+import im.vector.matrix.android.internal.util.awaitTransaction
+import io.realm.Realm
 import javax.inject.Inject
 
 internal interface RemovePusherTask : Task<RemovePusherTask.Params, Unit> {
@@ -39,42 +39,32 @@ internal class DefaultRemovePusherTask @Inject constructor(
         private val monarchy: Monarchy
 ) : RemovePusherTask {
 
-    override suspend fun execute(params: RemovePusherTask.Params): Try<Unit> {
-        return Try {
-            var existing: Pusher? = null
-            monarchy.runTransactionSync {
-                val existingEntity = PusherEntity.where(it, params.userId, params.pushKey).findFirst()
-                existingEntity?.state == PusherState.UNREGISTERING
-                existing = existingEntity?.asDomain()
-            }
-            if (existing == null) {
-                throw Exception("No existing pusher")
-            } else {
-                existing!!
-            }
-        }.flatMap {
-            executeRequest<Unit> {
-                val deleteBody = JsonPusher(
-                        pushKey = params.pushKey,
-                        appId = params.pushAppId,
-                        // kind null deletes the pusher
-                        kind = null,
-                        appDisplayName = it.appDisplayName ?: "",
-                        deviceDisplayName = it.deviceDisplayName ?: "",
-                        profileTag = it.profileTag ?: "",
-                        lang = it.lang,
-                        data = JsonPusherData(it.data.url, it.data.format),
-                        append = false
-                )
-                apiCall = pushersAPI.setPusher(deleteBody)
-            }
-        }.flatMap {
-            monarchy.tryTransactionSync {
-                val existing = PusherEntity.where(it, params.userId, params.pushKey).findFirst()
-                existing?.deleteFromRealm()
+    override suspend fun execute(params: RemovePusherTask.Params) {
+        val existing = Realm.getInstance(monarchy.realmConfiguration).use { realm ->
+            val existingEntity = PusherEntity.where(realm, params.userId, params.pushKey).findFirst()
+            realm.awaitTransaction {
+                existingEntity?.state = PusherState.UNREGISTERING
             }
+            existingEntity?.asDomain()
+        } ?: throw Exception("No existing pusher")
+
+        val deleteBody = JsonPusher(
+                pushKey = params.pushKey,
+                appId = params.pushAppId,
+                // kind null deletes the pusher
+                kind = null,
+                appDisplayName = existing.appDisplayName ?: "",
+                deviceDisplayName = existing.deviceDisplayName ?: "",
+                profileTag = existing.profileTag ?: "",
+                lang = existing.lang,
+                data = JsonPusherData(existing.data.url, existing.data.format),
+                append = false
+        )
+        executeRequest<Unit> {
+            apiCall = pushersAPI.setPusher(deleteBody)
+        }
+        monarchy.awaitTransaction {
+            PusherEntity.where(it, params.userId, params.pushKey).findFirst()?.deleteFromRealm()
         }
     }
-
-
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/pushers/UpdatePushRuleEnableStatusTask.kt

@@ -15,7 +15,6 @@
  */
 package im.vector.matrix.android.internal.session.pushers
 
-import arrow.core.Try
 import im.vector.matrix.android.api.pushrules.rest.PushRule
 import im.vector.matrix.android.internal.network.executeRequest
 import im.vector.matrix.android.internal.task.Task
@@ -31,7 +30,7 @@ internal interface UpdatePushRuleEnableStatusTask : Task<UpdatePushRuleEnableSta
 internal class DefaultUpdatePushRuleEnableStatusTask @Inject constructor(private val pushRulesApi: PushRulesApi)
     : UpdatePushRuleEnableStatusTask {
 
-    override suspend fun execute(params: UpdatePushRuleEnableStatusTask.Params): Try<Unit> {
+    override suspend fun execute(params: UpdatePushRuleEnableStatusTask.Params) {
         return executeRequest {
             apiCall = pushRulesApi.updateEnableRuleStatus(params.kind, params.pushRule.ruleId, params.enabled)
         }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/DefaultRoomService.kt

@@ -34,7 +34,7 @@ import im.vector.matrix.android.internal.session.room.create.CreateRoomTask
 import im.vector.matrix.android.internal.session.room.membership.joining.JoinRoomTask
 import im.vector.matrix.android.internal.task.TaskExecutor
 import im.vector.matrix.android.internal.task.configureWith
-import im.vector.matrix.android.internal.util.fetchManaged
+import io.realm.Realm
 import javax.inject.Inject
 
 internal class DefaultRoomService @Inject constructor(private val monarchy: Monarchy,
@@ -52,8 +52,13 @@ internal class DefaultRoomService @Inject constructor(private val monarchy: Mona
     }
 
     override fun getRoom(roomId: String): Room? {
-        monarchy.fetchManaged { RoomEntity.where(it, roomId).findFirst() } ?: return null
-        return roomFactory.create(roomId)
+        return Realm.getInstance(monarchy.realmConfiguration).use {
+            if (RoomEntity.where(it, roomId).findFirst() != null) {
+                roomFactory.create(roomId)
+            } else {
+                null
+            }
+        }
     }
 
     override fun liveRoomSummaries(): LiveData<List<RoomSummary>> {

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/EventRelationsAggregationTask.kt

@@ -15,7 +15,6 @@
  */
 package im.vector.matrix.android.internal.session.room
 
-import arrow.core.Try
 import com.zhuinden.monarchy.Monarchy
 import im.vector.matrix.android.api.session.crypto.CryptoService
 import im.vector.matrix.android.api.session.crypto.MXCryptoError
@@ -31,7 +30,7 @@ import im.vector.matrix.android.internal.database.query.create
 import im.vector.matrix.android.internal.database.query.where
 import im.vector.matrix.android.internal.session.room.send.LocalEchoEventFactory
 import im.vector.matrix.android.internal.task.Task
-import im.vector.matrix.android.internal.util.tryTransactionSync
+import im.vector.matrix.android.internal.util.awaitTransaction
 import io.realm.Realm
 import timber.log.Timber
 import javax.inject.Inject
@@ -54,10 +53,10 @@ internal class DefaultEventRelationsAggregationTask @Inject constructor(
     //OPT OUT serer aggregation until API mature enough
     private val SHOULD_HANDLE_SERVER_AGREGGATION = false
 
-    override suspend fun execute(params: EventRelationsAggregationTask.Params): Try<Unit> {
+    override suspend fun execute(params: EventRelationsAggregationTask.Params) {
         val events = params.events
         val userId = params.userId
-        return monarchy.tryTransactionSync { realm ->
+        monarchy.awaitTransaction { realm ->
             Timber.v(">>> DefaultEventRelationsAggregationTask[${params.hashCode()}] called with ${events.size} events")
             update(realm, events, userId)
             Timber.v("<<< DefaultEventRelationsAggregationTask[${params.hashCode()}] finished")

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

@@ -16,8 +16,6 @@
 
 package im.vector.matrix.android.internal.session.room.create
 
-import arrow.core.Try
-import arrow.core.recoverWith
 import com.zhuinden.monarchy.Monarchy
 import im.vector.matrix.android.api.session.room.failure.CreateRoomFailure
 import im.vector.matrix.android.api.session.room.model.create.CreateRoomParams
@@ -34,7 +32,7 @@ import im.vector.matrix.android.internal.session.room.read.SetReadMarkersTask
 import im.vector.matrix.android.internal.session.user.accountdata.DirectChatsHelper
 import im.vector.matrix.android.internal.session.user.accountdata.UpdateUserAccountDataTask
 import im.vector.matrix.android.internal.task.Task
-import im.vector.matrix.android.internal.util.tryTransactionSync
+import im.vector.matrix.android.internal.util.awaitTransaction
 import io.realm.RealmConfiguration
 import java.util.concurrent.TimeUnit
 import javax.inject.Inject
@@ -46,60 +44,49 @@ internal class DefaultCreateRoomTask @Inject constructor(private val roomAPI: Ro
                                                          private val directChatsHelper: DirectChatsHelper,
                                                          private val updateUserAccountDataTask: UpdateUserAccountDataTask,
                                                          private val readMarkersTask: SetReadMarkersTask,
-                                                         @SessionDatabase private val realmConfiguration: RealmConfiguration) : CreateRoomTask {
+                                                         @SessionDatabase
+                                                         private val realmConfiguration: RealmConfiguration) : CreateRoomTask {
 
 
-    override suspend fun execute(params: CreateRoomParams): Try<String> {
-        return executeRequest<CreateRoomResponse> {
+    override suspend fun execute(params: CreateRoomParams): String {
+        val createRoomResponse = executeRequest<CreateRoomResponse> {
             apiCall = roomAPI.createRoom(params)
-        }.flatMap { createRoomResponse ->
-            val roomId = createRoomResponse.roomId!!
-            // Wait for room to come back from the sync (but it can maybe be in the DB is the sync response is received before)
-            val rql = RealmQueryLatch<RoomEntity>(realmConfiguration) { realm ->
-                realm.where(RoomEntity::class.java)
-                        .equalTo(RoomEntityFields.ROOM_ID, roomId)
-            }
-            try {
-                rql.await(timeout = 1L, timeUnit = TimeUnit.MINUTES)
-                Try.just(roomId)
-            } catch (exception: Exception) {
-                Try.raise<String>(CreateRoomFailure.CreatedWithTimeout)
-            }
-        }.flatMap { roomId ->
-            if (params.isDirect()) {
-                handleDirectChatCreation(params, roomId)
-            } else {
-                Try.just(roomId)
-            }
-        }.flatMap { roomId ->
-            setReadMarkers(roomId)
         }
+        val roomId = createRoomResponse.roomId!!
+        // Wait for room to come back from the sync (but it can maybe be in the DB is the sync response is received before)
+        val rql = RealmQueryLatch<RoomEntity>(realmConfiguration) { realm ->
+            realm.where(RoomEntity::class.java)
+                    .equalTo(RoomEntityFields.ROOM_ID, roomId)
+        }
+        try {
+            rql.await(timeout = 1L, timeUnit = TimeUnit.MINUTES)
+        } catch (exception: Exception) {
+            throw CreateRoomFailure.CreatedWithTimeout
+        }
+        if (params.isDirect()) {
+            handleDirectChatCreation(params, roomId)
+        }
+        setReadMarkers(roomId)
+        return roomId
     }
 
-    private suspend fun handleDirectChatCreation(params: CreateRoomParams, roomId: String): Try<String> {
+    private suspend fun handleDirectChatCreation(params: CreateRoomParams, roomId: String) {
         val otherUserId = params.getFirstInvitedUserId()
-                          ?: return Try.raise(IllegalStateException("You can't create a direct room without an invitedUser"))
+                ?: throw IllegalStateException("You can't create a direct room without an invitedUser")
 
-        return monarchy.tryTransactionSync { realm ->
+        monarchy.awaitTransaction { realm ->
             RoomSummaryEntity.where(realm, roomId).findFirst()?.apply {
                 this.directUserId = otherUserId
                 this.isDirect = true
             }
-        }.flatMap {
-            val directChats = directChatsHelper.getLocalUserAccount()
-            updateUserAccountDataTask.execute(UpdateUserAccountDataTask.DirectChatParams(directMessages = directChats))
-        }.flatMap {
-            Try.just(roomId)
         }
+        val directChats = directChatsHelper.getLocalUserAccount()
+        updateUserAccountDataTask.execute(UpdateUserAccountDataTask.DirectChatParams(directMessages = directChats))
     }
 
-    private suspend fun setReadMarkers(roomId: String): Try<String> {
+    private suspend fun setReadMarkers(roomId: String) {
         val setReadMarkerParams = SetReadMarkersTask.Params(roomId, markAllAsRead = true)
-        return readMarkersTask
-                .execute(setReadMarkerParams)
-                .flatMap {
-                    Try.just(roomId)
-                }
+        return readMarkersTask.execute(setReadMarkerParams)
     }
 
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/directory/GetPublicRoomTask.kt

@@ -16,11 +16,9 @@
 
 package im.vector.matrix.android.internal.session.room.directory
 
-import arrow.core.Try
 import im.vector.matrix.android.api.session.room.model.roomdirectory.PublicRoomsParams
 import im.vector.matrix.android.api.session.room.model.roomdirectory.PublicRoomsResponse
 import im.vector.matrix.android.internal.network.executeRequest
-import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.session.room.RoomAPI
 import im.vector.matrix.android.internal.task.Task
 import javax.inject.Inject
@@ -34,7 +32,7 @@ internal interface GetPublicRoomTask : Task<GetPublicRoomTask.Params, PublicRoom
 
 internal class DefaultGetPublicRoomTask @Inject constructor(private val roomAPI: RoomAPI) : GetPublicRoomTask {
 
-    override suspend fun execute(params: GetPublicRoomTask.Params): Try<PublicRoomsResponse> {
+    override suspend fun execute(params: GetPublicRoomTask.Params): PublicRoomsResponse {
         return executeRequest {
             apiCall = roomAPI.publicRooms(params.server, params.publicRoomsParams)
         }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/directory/GetThirdPartyProtocolsTask.kt

@@ -16,19 +16,17 @@
 
 package im.vector.matrix.android.internal.session.room.directory
 
-import arrow.core.Try
 import im.vector.matrix.android.api.session.room.model.thirdparty.ThirdPartyProtocol
 import im.vector.matrix.android.internal.network.executeRequest
-import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.session.room.RoomAPI
 import im.vector.matrix.android.internal.task.Task
 import javax.inject.Inject
 
 internal interface GetThirdPartyProtocolsTask : Task<Unit, Map<String, ThirdPartyProtocol>>
 
-internal class DefaultGetThirdPartyProtocolsTask @Inject constructor (private val roomAPI: RoomAPI) : GetThirdPartyProtocolsTask {
+internal class DefaultGetThirdPartyProtocolsTask @Inject constructor(private val roomAPI: RoomAPI) : GetThirdPartyProtocolsTask {
 
-    override suspend fun execute(params: Unit): Try<Map<String, ThirdPartyProtocol>> {
+    override suspend fun execute(params: Unit): Map<String, ThirdPartyProtocol> {
         return executeRequest {
             apiCall = roomAPI.thirdPartyProtocols()
         }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/membership/DefaultMembershipService.kt

@@ -42,7 +42,7 @@ internal class DefaultMembershipService @Inject constructor(private val roomId:
                                                             private val leaveRoomTask: LeaveRoomTask
 ) : MembershipService {
 
-    override fun loadRoomMembersIfNeeded(matrixCallback: MatrixCallback<Boolean>): Cancelable {
+    override fun loadRoomMembersIfNeeded(matrixCallback: MatrixCallback<Unit>): Cancelable {
         val params = LoadRoomMembersTask.Params(roomId, Membership.LEAVE)
         return loadRoomMembersTask.configureWith(params)
                 .dispatchTo(matrixCallback)

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

@@ -16,8 +16,6 @@
 
 package im.vector.matrix.android.internal.session.room.membership
 
-import arrow.core.Try
-import com.squareup.moshi.JsonReader
 import com.zhuinden.monarchy.Monarchy
 import im.vector.matrix.android.api.session.room.model.Membership
 import im.vector.matrix.android.internal.database.helper.addStateEvent
@@ -30,14 +28,12 @@ import im.vector.matrix.android.internal.session.room.RoomSummaryUpdater
 import im.vector.matrix.android.internal.session.sync.SyncTokenStore
 import im.vector.matrix.android.internal.session.user.UserEntityFactory
 import im.vector.matrix.android.internal.task.Task
-import im.vector.matrix.android.internal.util.tryTransactionSync
+import im.vector.matrix.android.internal.util.awaitTransaction
 import io.realm.Realm
 import io.realm.kotlin.createObject
-import okhttp3.ResponseBody
-import okio.Okio
 import javax.inject.Inject
 
-internal interface LoadRoomMembersTask : Task<LoadRoomMembersTask.Params, Boolean> {
+internal interface LoadRoomMembersTask : Task<LoadRoomMembersTask.Params, Unit> {
 
     data class Params(
             val roomId: String,
@@ -51,39 +47,36 @@ internal class DefaultLoadRoomMembersTask @Inject constructor(private val roomAP
                                                               private val roomSummaryUpdater: RoomSummaryUpdater
 ) : LoadRoomMembersTask {
 
-    override suspend fun execute(params: LoadRoomMembersTask.Params): Try<Boolean> {
-        return if (areAllMembersAlreadyLoaded(params.roomId)) {
-            Try.just(true)
-        } else {
-            val lastToken = syncTokenStore.getLastToken()
-            executeRequest<RoomMembersResponse> {
-                apiCall = roomAPI.getMembers(params.roomId, lastToken, null, params.excludeMembership?.value)
-            }.flatMap { response ->
-                insertInDb(response, params.roomId)
-            }.map { true }
+    override suspend fun execute(params: LoadRoomMembersTask.Params) {
+        if (areAllMembersAlreadyLoaded(params.roomId)) {
+            return
         }
+        val lastToken = syncTokenStore.getLastToken()
+        val response = executeRequest<RoomMembersResponse> {
+            apiCall = roomAPI.getMembers(params.roomId, lastToken, null, params.excludeMembership?.value)
+        }
+        insertInDb(response, params.roomId)
     }
 
-    private fun insertInDb(response: RoomMembersResponse, roomId: String): Try<Unit> {
-        return monarchy
-                .tryTransactionSync { realm ->
-                    // We ignore all the already known members
-                    val roomEntity = RoomEntity.where(realm, roomId).findFirst()
-                            ?: realm.createObject(roomId)
+    private suspend fun insertInDb(response: RoomMembersResponse, roomId: String) {
+        monarchy.awaitTransaction { realm ->
+            // We ignore all the already known members
+            val roomEntity = RoomEntity.where(realm, roomId).findFirst()
+                    ?: realm.createObject(roomId)
 
 
-                    for (roomMemberEvent in response.roomMemberEvents) {
-                        roomEntity.addStateEvent(roomMemberEvent)
-                        UserEntityFactory.createOrNull(roomMemberEvent)?.also {
-                            realm.insertOrUpdate(it)
-                        }
-                    }
-                    roomEntity.chunks.flatMap { it.timelineEvents }.forEach {
-                        it.updateSenderData()
-                    }
-                    roomEntity.areAllMembersLoaded = true
-                    roomSummaryUpdater.update(realm, roomId)
+            for (roomMemberEvent in response.roomMemberEvents) {
+                roomEntity.addStateEvent(roomMemberEvent)
+                UserEntityFactory.createOrNull(roomMemberEvent)?.also {
+                    realm.insertOrUpdate(it)
                 }
+            }
+            roomEntity.chunks.flatMap { it.timelineEvents }.forEach {
+                it.updateSenderData()
+            }
+            roomEntity.areAllMembersLoaded = true
+            roomSummaryUpdater.update(realm, roomId)
+        }
     }
 
     private fun areAllMembersAlreadyLoaded(roomId: String): Boolean {

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/membership/joining/InviteTask.kt

@@ -16,9 +16,7 @@
 
 package im.vector.matrix.android.internal.session.room.membership.joining
 
-import arrow.core.Try
 import im.vector.matrix.android.internal.network.executeRequest
-import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.session.room.RoomAPI
 import im.vector.matrix.android.internal.task.Task
 import javax.inject.Inject
@@ -33,7 +31,7 @@ internal interface InviteTask : Task<InviteTask.Params, Unit> {
 
 internal class DefaultInviteTask @Inject constructor(private val roomAPI: RoomAPI) : InviteTask {
 
-    override suspend fun execute(params: InviteTask.Params): Try<Unit> {
+    override suspend fun execute(params: InviteTask.Params) {
         return executeRequest {
             val body = InviteBody(params.userId)
             apiCall = roomAPI.invite(params.roomId, body)

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

@@ -16,8 +16,6 @@
 
 package im.vector.matrix.android.internal.session.room.membership.joining
 
-import arrow.core.Try
-import im.vector.matrix.android.api.session.room.failure.CreateRoomFailure
 import im.vector.matrix.android.api.session.room.failure.JoinRoomFailure
 import im.vector.matrix.android.internal.database.RealmQueryLatch
 import im.vector.matrix.android.internal.database.model.RoomEntity
@@ -40,32 +38,30 @@ internal interface JoinRoomTask : Task<JoinRoomTask.Params, Unit> {
 
 internal class DefaultJoinRoomTask @Inject constructor(private val roomAPI: RoomAPI,
                                                        private val readMarkersTask: SetReadMarkersTask,
-                                                       @SessionDatabase private val realmConfiguration: RealmConfiguration) : JoinRoomTask {
+                                                       @SessionDatabase
+                                                       private val realmConfiguration: RealmConfiguration) : JoinRoomTask {
 
-    override suspend fun execute(params: JoinRoomTask.Params): Try<Unit> {
-        return executeRequest<Unit> {
+    override suspend fun execute(params: JoinRoomTask.Params) {
+        executeRequest<Unit> {
             apiCall = roomAPI.join(params.roomId, params.viaServers, HashMap())
-        }.flatMap {
-            val roomId = params.roomId
-            // Wait for room to come back from the sync (but it can maybe be in the DB is the sync response is received before)
-            val rql = RealmQueryLatch<RoomEntity>(realmConfiguration) { realm ->
-                realm.where(RoomEntity::class.java)
-                        .equalTo(RoomEntityFields.ROOM_ID, roomId)
-            }
-            try {
-                rql.await(timeout = 1L, timeUnit = TimeUnit.MINUTES)
-                Try.just(roomId)
-            } catch (exception: Exception) {
-                Try.raise<String>(JoinRoomFailure.JoinedWithTimeout)
-            }
-        }.flatMap { roomId ->
-            setReadMarkers(roomId)
         }
+        val roomId = params.roomId
+        // Wait for room to come back from the sync (but it can maybe be in the DB is the sync response is received before)
+        val rql = RealmQueryLatch<RoomEntity>(realmConfiguration) { realm ->
+            realm.where(RoomEntity::class.java)
+                    .equalTo(RoomEntityFields.ROOM_ID, roomId)
+        }
+        try {
+            rql.await(timeout = 1L, timeUnit = TimeUnit.MINUTES)
+        } catch (exception: Exception) {
+            throw JoinRoomFailure.JoinedWithTimeout
+        }
+        setReadMarkers(roomId)
     }
 
-    private suspend fun setReadMarkers(roomId: String): Try<Unit> {
+    private suspend fun setReadMarkers(roomId: String) {
         val setReadMarkerParams = SetReadMarkersTask.Params(roomId, markAllAsRead = true)
-        return readMarkersTask.execute(setReadMarkerParams)
+        readMarkersTask.execute(setReadMarkerParams)
     }
 
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/membership/leaving/LeaveRoomTask.kt

@@ -16,9 +16,7 @@
 
 package im.vector.matrix.android.internal.session.room.membership.leaving
 
-import arrow.core.Try
 import im.vector.matrix.android.internal.network.executeRequest
-import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.session.room.RoomAPI
 import im.vector.matrix.android.internal.task.Task
 import javax.inject.Inject
@@ -31,7 +29,7 @@ internal interface LeaveRoomTask : Task<LeaveRoomTask.Params, Unit> {
 
 internal class DefaultLeaveRoomTask @Inject constructor(private val roomAPI: RoomAPI) : LeaveRoomTask {
 
-    override suspend fun execute(params: LeaveRoomTask.Params): Try<Unit> {
+    override suspend fun execute(params: LeaveRoomTask.Params) {
         return executeRequest {
             apiCall = roomAPI.leave(params.roomId, HashMap())
         }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/prune/PruneEventTask.kt

@@ -15,12 +15,10 @@
  */
 package im.vector.matrix.android.internal.session.room.prune
 
-import arrow.core.Try
 import com.zhuinden.monarchy.Monarchy
 import im.vector.matrix.android.api.session.events.model.Event
 import im.vector.matrix.android.api.session.events.model.EventType
 import im.vector.matrix.android.api.session.events.model.UnsignedData
-import im.vector.matrix.android.api.session.room.send.SendState
 import im.vector.matrix.android.internal.database.helper.updateSenderData
 import im.vector.matrix.android.internal.database.mapper.ContentMapper
 import im.vector.matrix.android.internal.database.mapper.EventMapper
@@ -31,7 +29,7 @@ import im.vector.matrix.android.internal.database.query.where
 import im.vector.matrix.android.internal.di.MoshiProvider
 import im.vector.matrix.android.internal.session.room.send.LocalEchoEventFactory
 import im.vector.matrix.android.internal.task.Task
-import im.vector.matrix.android.internal.util.tryTransactionSync
+import im.vector.matrix.android.internal.util.awaitTransaction
 import io.realm.Realm
 import timber.log.Timber
 import javax.inject.Inject
@@ -48,8 +46,8 @@ internal interface PruneEventTask : Task<PruneEventTask.Params, Unit> {
 
 internal class DefaultPruneEventTask @Inject constructor(private val monarchy: Monarchy) : PruneEventTask {
 
-    override suspend fun execute(params: PruneEventTask.Params): Try<Unit> {
-        return monarchy.tryTransactionSync { realm ->
+    override suspend fun execute(params: PruneEventTask.Params) {
+        monarchy.awaitTransaction { realm ->
             params.redactionEvents.forEach { event ->
                 pruneEvent(realm, event, params.userId)
             }

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

@@ -16,7 +16,6 @@
 
 package im.vector.matrix.android.internal.session.room.read
 
-import arrow.core.Try
 import com.zhuinden.monarchy.Monarchy
 import im.vector.matrix.android.api.auth.data.Credentials
 import im.vector.matrix.android.internal.database.model.ChunkEntity
@@ -31,7 +30,6 @@ import im.vector.matrix.android.internal.network.executeRequest
 import im.vector.matrix.android.internal.session.room.RoomAPI
 import im.vector.matrix.android.internal.session.room.send.LocalEchoEventFactory
 import im.vector.matrix.android.internal.task.Task
-import im.vector.matrix.android.internal.util.tryTransactionAsync
 import io.realm.Realm
 import timber.log.Timber
 import javax.inject.Inject
@@ -54,7 +52,7 @@ internal class DefaultSetReadMarkersTask @Inject constructor(private val roomAPI
                                                              private val monarchy: Monarchy
 ) : SetReadMarkersTask {
 
-    override suspend fun execute(params: SetReadMarkersTask.Params): Try<Unit> {
+    override suspend fun execute(params: SetReadMarkersTask.Params) {
         val markers = HashMap<String, String>()
         val fullyReadEventId: String?
         val readReceiptEventId: String?
@@ -78,7 +76,7 @@ internal class DefaultSetReadMarkersTask @Inject constructor(private val roomAPI
             }
         }
         if (readReceiptEventId != null
-            && !isEventRead(params.roomId, readReceiptEventId)) {
+                && !isEventRead(params.roomId, readReceiptEventId)) {
 
             if (LocalEchoEventFactory.isLocalEchoId(readReceiptEventId)) {
                 Timber.w("Can't set read receipt for local event ${params.fullyReadEventId}")
@@ -87,21 +85,20 @@ internal class DefaultSetReadMarkersTask @Inject constructor(private val roomAPI
                 markers[READ_RECEIPT] = readReceiptEventId
             }
         }
-        return if (markers.isEmpty()) {
-            Try.just(Unit)
-        } else {
-            executeRequest {
-                apiCall = roomAPI.sendReadMarker(params.roomId, markers)
-            }
+        if (markers.isEmpty()) {
+            return
+        }
+        executeRequest<Unit> {
+            apiCall = roomAPI.sendReadMarker(params.roomId, markers)
         }
     }
 
     private fun updateNotificationCountIfNecessary(roomId: String, eventId: String) {
-        monarchy.tryTransactionAsync { realm ->
+        monarchy.writeAsync { realm ->
             val isLatestReceived = TimelineEventEntity.latestEvent(realm, roomId = roomId, includesSending = false)?.eventId == eventId
             if (isLatestReceived) {
                 val roomSummary = RoomSummaryEntity.where(realm, roomId).findFirst()
-                                  ?: return@tryTransactionAsync
+                        ?: return@writeAsync
                 roomSummary.notificationCount = 0
                 roomSummary.highlightCount = 0
             }
@@ -112,13 +109,13 @@ internal class DefaultSetReadMarkersTask @Inject constructor(private val roomAPI
         var isEventRead = false
         monarchy.doWithRealm {
             val readReceipt = ReadReceiptEntity.where(it, roomId, credentials.userId).findFirst()
-                              ?: return@doWithRealm
+                    ?: return@doWithRealm
             val liveChunk = ChunkEntity.findLastLiveChunkFromRoom(it, roomId)
-                            ?: return@doWithRealm
+                    ?: return@doWithRealm
             val readReceiptIndex = liveChunk.timelineEvents.find(readReceipt.eventId)?.root?.displayIndex
-                                   ?: Int.MIN_VALUE
+                    ?: Int.MIN_VALUE
             val eventToCheckIndex = liveChunk.timelineEvents.find(eventId)?.root?.displayIndex
-                                    ?: Int.MAX_VALUE
+                    ?: Int.MAX_VALUE
             isEventRead = eventToCheckIndex <= readReceiptIndex
         }
         return isEventRead

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/relation/DefaultRelationService.kt

@@ -43,7 +43,6 @@ import im.vector.matrix.android.internal.session.room.timeline.TimelineSendEvent
 import im.vector.matrix.android.internal.task.TaskExecutor
 import im.vector.matrix.android.internal.task.configureWith
 import im.vector.matrix.android.internal.util.CancelableWork
-import im.vector.matrix.android.internal.util.tryTransactionAsync
 import im.vector.matrix.android.internal.worker.WorkerParamsFactory
 import timber.log.Timber
 import javax.inject.Inject
@@ -223,9 +222,9 @@ internal class DefaultRelationService @Inject constructor(private val context: C
      * the same transaction id is received (in unsigned data)
      */
     private fun saveLocalEcho(event: Event) {
-        monarchy.tryTransactionAsync { realm ->
+        monarchy.writeAsync { realm ->
             val roomEntity = RoomEntity.where(realm, roomId = roomId).findFirst()
-                    ?: return@tryTransactionAsync
+                    ?: return@writeAsync
             roomEntity.addSendingEvent(event)
         }
     }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/relation/FetchEditHistoryTask.kt

@@ -15,7 +15,6 @@
  */
 package im.vector.matrix.android.internal.session.room.relation
 
-import arrow.core.Try
 import im.vector.matrix.android.api.session.events.model.Event
 import im.vector.matrix.android.api.session.events.model.EventType
 import im.vector.matrix.android.api.session.events.model.RelationType
@@ -39,16 +38,16 @@ internal class DefaultFetchEditHistoryTask @Inject constructor(
         private val roomAPI: RoomAPI
 ) : FetchEditHistoryTask {
 
-    override suspend fun execute(params: FetchEditHistoryTask.Params): Try<List<Event>> {
-        return executeRequest<RelationsResponse> {
+    override suspend fun execute(params: FetchEditHistoryTask.Params): List<Event> {
+        val response = executeRequest<RelationsResponse> {
             apiCall = roomAPI.getRelations(params.roomId,
                     params.eventId,
                     RelationType.REPLACE,
                     if (params.isRoomEncrypted) EventType.ENCRYPTED else EventType.MESSAGE)
-        }.map { resp ->
-            val events = resp.chunks.toMutableList()
-            resp.originalEvent?.let { events.add(it) }
-            events
         }
+
+        val events = response.chunks.toMutableList()
+        response.originalEvent?.let { events.add(it) }
+        return events
     }
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/relation/FindReactionEventForUndoTask.kt

@@ -15,13 +15,11 @@
  */
 package im.vector.matrix.android.internal.session.room.relation
 
-import arrow.core.Try
 import com.zhuinden.monarchy.Monarchy
 import im.vector.matrix.android.internal.database.model.EventAnnotationsSummaryEntity
 import im.vector.matrix.android.internal.database.model.EventEntity
 import im.vector.matrix.android.internal.database.model.ReactionAggregatedSummaryEntityFields
 import im.vector.matrix.android.internal.database.query.where
-import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.task.Task
 import io.realm.Realm
 import javax.inject.Inject
@@ -44,14 +42,11 @@ internal interface FindReactionEventForUndoTask : Task<FindReactionEventForUndoT
 
 internal class DefaultFindReactionEventForUndoTask @Inject constructor(private val monarchy: Monarchy) : FindReactionEventForUndoTask {
 
-    override suspend fun execute(params: FindReactionEventForUndoTask.Params): Try<FindReactionEventForUndoTask.Result> {
-        return Try {
-            var eventId: String? = null
-            monarchy.doWithRealm { realm ->
-                eventId = getReactionToRedact(realm, params.reaction, params.eventId, params.myUserId)?.eventId
-            }
-            FindReactionEventForUndoTask.Result(eventId)
+    override suspend fun execute(params: FindReactionEventForUndoTask.Params): FindReactionEventForUndoTask.Result {
+        val eventId = Realm.getInstance(monarchy.realmConfiguration).use { realm ->
+            getReactionToRedact(realm, params.reaction, params.eventId, params.myUserId)?.eventId
         }
+        return FindReactionEventForUndoTask.Result(eventId)
     }
 
     private fun getReactionToRedact(realm: Realm, reaction: String, eventId: String, userId: String): EventEntity? {

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/relation/SendRelationWorker.kt

@@ -66,18 +66,11 @@ internal class SendRelationWorker(context: Context, params: WorkerParameters) :
         val relatedEventId = relationContent.relatesTo?.eventId ?: return Result.failure()
         val relationType = (relationContent.relatesTo as? ReactionInfo)?.type ?: params.relationType
         ?: return Result.failure()
-
-        val result = executeRequest<SendResponse> {
-            apiCall = roomAPI.sendRelation(
-                    roomId = params.roomId,
-                    parent_id = relatedEventId,
-                    relationType = relationType,
-                    eventType = localEvent.type,
-                    content = localEvent.content
-            )
-        }
-        return result.fold({
-            when (it) {
+        return try {
+            sendRelation(params.roomId, relationType, relatedEventId, localEvent)
+            Result.success()
+        } catch (exception: Throwable) {
+            when (exception) {
                 is Failure.NetworkConnection -> Result.retry()
                 else                         -> {
                     //TODO mark as failed to send?
@@ -85,7 +78,19 @@ internal class SendRelationWorker(context: Context, params: WorkerParameters) :
                     Result.success()
                 }
             }
-        }, { Result.success() })
+        }
+    }
+
+    private suspend fun sendRelation(roomId: String, relationType: String, relatedEventId: String, localEvent: Event) {
+        executeRequest<SendResponse> {
+            apiCall = roomAPI.sendRelation(
+                    roomId = roomId,
+                    parent_id = relatedEventId,
+                    relationType = relationType,
+                    eventType = localEvent.type,
+                    content = localEvent.content
+            )
+        }
     }
 
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/relation/UpdateQuickReactionTask.kt

@@ -15,13 +15,11 @@
  */
 package im.vector.matrix.android.internal.session.room.relation
 
-import arrow.core.Try
 import com.zhuinden.monarchy.Monarchy
 import im.vector.matrix.android.internal.database.model.EventAnnotationsSummaryEntity
 import im.vector.matrix.android.internal.database.model.EventEntity
 import im.vector.matrix.android.internal.database.model.ReactionAggregatedSummaryEntityFields
 import im.vector.matrix.android.internal.database.query.where
-import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.task.Task
 import io.realm.Realm
 import javax.inject.Inject
@@ -44,14 +42,13 @@ internal interface UpdateQuickReactionTask : Task<UpdateQuickReactionTask.Params
 }
 
 internal class DefaultUpdateQuickReactionTask @Inject constructor(private val monarchy: Monarchy) : UpdateQuickReactionTask {
-    override suspend fun execute(params: UpdateQuickReactionTask.Params): Try<UpdateQuickReactionTask.Result> {
-        return Try {
-            var res: Pair<String?, List<String>?>? = null
-            monarchy.doWithRealm { realm ->
-                res = updateQuickReaction(realm, params.reaction, params.oppositeReaction, params.eventId, params.myUserId)
-            }
-            UpdateQuickReactionTask.Result(res?.first, res?.second ?: emptyList())
+
+    override suspend fun execute(params: UpdateQuickReactionTask.Params): UpdateQuickReactionTask.Result {
+        var res: Pair<String?, List<String>?>? = null
+        monarchy.doWithRealm { realm ->
+            res = updateQuickReaction(realm, params.reaction, params.oppositeReaction, params.eventId, params.myUserId)
         }
+        return UpdateQuickReactionTask.Result(res?.first, res?.second ?: emptyList())
     }
 
 

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/send/DefaultSendService.kt

@@ -41,7 +41,6 @@ import im.vector.matrix.android.internal.database.query.where
 import im.vector.matrix.android.internal.session.content.UploadContentWorker
 import im.vector.matrix.android.internal.session.room.timeline.TimelineSendEventWorkCommon
 import im.vector.matrix.android.internal.util.CancelableWork
-import im.vector.matrix.android.internal.util.tryTransactionAsync
 import im.vector.matrix.android.internal.worker.WorkManagerUtil
 import im.vector.matrix.android.internal.worker.WorkManagerUtil.matrixOneTimeWorkRequestBuilder
 import im.vector.matrix.android.internal.worker.WorkerParamsFactory
@@ -149,7 +148,7 @@ internal class DefaultSendService @Inject constructor(private val context: Conte
     }
 
     override fun deleteFailedEcho(localEcho: TimelineEvent) {
-        monarchy.tryTransactionAsync { realm ->
+        monarchy.writeAsync { realm ->
             TimelineEventEntity.where(realm, eventId = localEcho.root.eventId
                     ?: "").findFirst()?.let {
                 it.deleteFromRealm()
@@ -175,7 +174,7 @@ internal class DefaultSendService @Inject constructor(private val context: Conte
                             .enqueue()
                 }
 
-        monarchy.tryTransactionAsync { realm ->
+        monarchy.writeAsync { realm ->
             RoomEntity.where(realm, roomId).findFirst()?.let { room ->
                 room.sendingTimelineEvents.forEach {
                     it.root?.sendState = SendState.UNDELIVERED
@@ -186,7 +185,7 @@ internal class DefaultSendService @Inject constructor(private val context: Conte
     }
 
     override fun resendAllFailedMessages() {
-        monarchy.tryTransactionAsync { realm ->
+        monarchy.writeAsync { realm ->
             RoomEntity.where(realm, roomId).findFirst()?.let { room ->
                 room.sendingTimelineEvents.filter {
                     it.root?.sendState?.hasFailed() ?: false

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/send/EncryptEventWorker.kt

@@ -17,7 +17,7 @@
 package im.vector.matrix.android.internal.session.room.send
 
 import android.content.Context
-import androidx.work.Worker
+import androidx.work.CoroutineWorker
 import androidx.work.WorkerParameters
 import com.squareup.moshi.JsonClass
 import im.vector.matrix.android.api.MatrixCallback
@@ -34,7 +34,7 @@ import java.util.concurrent.CountDownLatch
 import javax.inject.Inject
 
 internal class EncryptEventWorker(context: Context, params: WorkerParameters)
-    : Worker(context, params) {
+    : CoroutineWorker(context, params) {
 
     @JsonClass(generateAdapter = true)
     internal data class Params(
@@ -49,7 +49,7 @@ internal class EncryptEventWorker(context: Context, params: WorkerParameters)
     @Inject lateinit var crypto: CryptoService
     @Inject lateinit var localEchoUpdater: LocalEchoUpdater
 
-    override fun doWork(): Result {
+    override suspend fun doWork(): Result {
         Timber.v("Start Encrypt work")
         val params = WorkerParamsFactory.fromData<Params>(inputData)
                 ?: return Result.success().also {

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

@@ -36,7 +36,6 @@ import im.vector.matrix.android.internal.database.query.where
 import im.vector.matrix.android.internal.session.content.ThumbnailExtractor
 import im.vector.matrix.android.internal.session.room.RoomSummaryUpdater
 import im.vector.matrix.android.internal.util.StringProvider
-import im.vector.matrix.android.internal.util.tryTransactionAsync
 import org.commonmark.parser.Parser
 import org.commonmark.renderer.html.HtmlRenderer
 import java.util.*
@@ -380,9 +379,9 @@ internal class LocalEchoEventFactory @Inject constructor(private val credentials
 
     fun saveLocalEcho(monarchy: Monarchy, event: Event) {
         if (event.roomId == null) throw IllegalStateException("Your event should have a roomId")
-        monarchy.tryTransactionAsync { realm ->
+        monarchy.writeAsync { realm ->
             val roomEntity = RoomEntity.where(realm, roomId = event.roomId).findFirst()
-                    ?: return@tryTransactionAsync
+                    ?: return@writeAsync
             roomEntity.addSendingEvent(event)
             roomSummaryUpdater.update(realm, event.roomId)
         }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/send/LocalEchoUpdater.kt

@@ -20,15 +20,15 @@ import com.zhuinden.monarchy.Monarchy
 import im.vector.matrix.android.api.session.room.send.SendState
 import im.vector.matrix.android.internal.database.model.EventEntity
 import im.vector.matrix.android.internal.database.query.where
-import im.vector.matrix.android.internal.util.tryTransactionAsync
+import im.vector.matrix.android.internal.util.awaitTransaction
 import timber.log.Timber
 import javax.inject.Inject
 
 internal class LocalEchoUpdater @Inject constructor(private val monarchy: Monarchy) {
 
-    fun updateSendState(eventId: String, sendState: SendState) {
+    suspend fun updateSendState(eventId: String, sendState: SendState) {
         Timber.v("Update local state of $eventId to ${sendState.name}")
-        monarchy.tryTransactionAsync { realm ->
+        monarchy.awaitTransaction { realm ->
             val sendingEventEntity = EventEntity.where(realm, eventId).findFirst()
             if (sendingEventEntity != null) {
                 if (sendState == SendState.SENT && sendingEventEntity.sendState == SendState.SYNCED) {

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/send/RedactEventWorker.kt

@@ -54,28 +54,32 @@ internal class RedactEventWorker(context: Context, params: WorkerParameters) : C
         sessionComponent.inject(this)
 
         val eventId = params.eventId
-        val result = executeRequest<SendResponse> {
-            apiCall = roomAPI.redactEvent(
-                    params.txID,
-                    params.roomId,
-                    eventId,
-                    if (params.reason == null) emptyMap() else mapOf("reason" to params.reason)
-            )
-        }
-        return result.fold({
-            when (it) {
-                is Failure.NetworkConnection -> Result.retry()
-                else                         -> {
-                    //TODO mark as failed to send?
-                    //always return success, or the chain will be stuck for ever!
-                    Result.success(WorkerParamsFactory.toData(params.copy(
-                            lastFailureMessage = it.localizedMessage
-                    )))
-                }
+        return runCatching {
+            executeRequest<SendResponse> {
+                apiCall = roomAPI.redactEvent(
+                        params.txID,
+                        params.roomId,
+                        eventId,
+                        if (params.reason == null) emptyMap() else mapOf("reason" to params.reason)
+                )
             }
-        }, {
-            Result.success()
-        })
+        }.fold(
+                {
+                    Result.success()
+                },
+                {
+                    when (it) {
+                        is Failure.NetworkConnection -> Result.retry()
+                        else                         -> {
+                            //TODO mark as failed to send?
+                            //always return success, or the chain will be stuck for ever!
+                            Result.success(WorkerParamsFactory.toData(params.copy(
+                                    lastFailureMessage = it.localizedMessage
+                            )))
+                        }
+                    }
+                }
+        )
     }
 
 }

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

@@ -21,6 +21,7 @@ import androidx.work.CoroutineWorker
 import androidx.work.WorkerParameters
 import com.squareup.moshi.JsonClass
 import im.vector.matrix.android.api.failure.Failure
+import im.vector.matrix.android.api.session.events.model.Content
 import im.vector.matrix.android.api.session.events.model.Event
 import im.vector.matrix.android.api.session.room.send.SendState
 import im.vector.matrix.android.internal.network.executeRequest
@@ -59,22 +60,14 @@ internal class SendEventWorker constructor(context: Context, params: WorkerParam
 
         if (params.lastFailureMessage != null) {
             localEchoUpdater.updateSendState(event.eventId, SendState.UNDELIVERED)
-
             // Transmit the error
             return Result.success(inputData)
         }
-
-        localEchoUpdater.updateSendState(event.eventId, SendState.SENDING)
-        val result = executeRequest<SendResponse> {
-            apiCall = roomAPI.send(
-                    event.eventId,
-                    params.roomId,
-                    event.type,
-                    event.content
-            )
-        }
-        return result.fold({
-            when (it) {
+        return try {
+            sendEvent(event.eventId, event.type, event.content, params.roomId)
+            Result.success()
+        } catch (exception: Throwable) {
+            when (exception) {
                 is Failure.NetworkConnection -> Result.retry()
                 else                         -> {
                     localEchoUpdater.updateSendState(event.eventId, SendState.UNDELIVERED)
@@ -82,10 +75,20 @@ internal class SendEventWorker constructor(context: Context, params: WorkerParam
                     Result.success()
                 }
             }
-        }, {
-            localEchoUpdater.updateSendState(event.eventId, SendState.SENT)
-            Result.success()
-        })
+        }
+    }
+
+    private suspend fun sendEvent(eventId: String, eventType: String, content: Content?, roomId: String) {
+        localEchoUpdater.updateSendState(eventId, SendState.SENDING)
+        executeRequest<SendResponse> {
+            apiCall = roomAPI.send(
+                    eventId,
+                    roomId,
+                    eventType,
+                    content
+            )
+        }
+        localEchoUpdater.updateSendState(eventId, SendState.SENT)
     }
 
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/state/SendStateTask.kt

@@ -16,9 +16,7 @@
 
 package im.vector.matrix.android.internal.session.room.state
 
-import arrow.core.Try
 import im.vector.matrix.android.internal.network.executeRequest
-import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.session.room.RoomAPI
 import im.vector.matrix.android.internal.task.Task
 import javax.inject.Inject
@@ -32,7 +30,7 @@ internal interface SendStateTask : Task<SendStateTask.Params, Unit> {
 }
 
 internal class DefaultSendStateTask @Inject constructor(private val roomAPI: RoomAPI) : SendStateTask {
-    override suspend fun execute(params: SendStateTask.Params): Try<Unit> {
+    override suspend fun execute(params: SendStateTask.Params) {
         return executeRequest {
             apiCall = roomAPI.sendStateEvent(params.roomId, params.eventType, params.body)
         }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/timeline/DefaultGetContextOfEventTask.kt

@@ -38,13 +38,12 @@ internal class DefaultGetContextOfEventTask @Inject constructor(private val room
                                             private val tokenChunkEventPersistor: TokenChunkEventPersistor
 ) : GetContextOfEventTask {
 
-    override suspend fun execute(params: GetContextOfEventTask.Params): Try<TokenChunkEventPersistor.Result> {
+    override suspend fun execute(params: GetContextOfEventTask.Params): TokenChunkEventPersistor.Result {
         val filter = filterRepository.getRoomFilter()
-        return executeRequest<EventContextResponse> {
+        val response = executeRequest<EventContextResponse> {
             apiCall = roomAPI.getContextOfEvent(params.roomId, params.eventId, 0, filter)
-        }.flatMap { response ->
-            tokenChunkEventPersistor.insertInDb(response, params.roomId, PaginationDirection.BACKWARDS)
         }
+        return tokenChunkEventPersistor.insertInDb(response, params.roomId, PaginationDirection.BACKWARDS)
     }
 
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/timeline/DefaultPaginationTask.kt

@@ -16,9 +16,7 @@
 
 package im.vector.matrix.android.internal.session.room.timeline
 
-import arrow.core.Try
 import im.vector.matrix.android.internal.network.executeRequest
-import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.session.filter.FilterRepository
 import im.vector.matrix.android.internal.session.room.RoomAPI
 import im.vector.matrix.android.internal.task.Task
@@ -41,14 +39,12 @@ internal class DefaultPaginationTask @Inject constructor(private val roomAPI: Ro
                                                          private val tokenChunkEventPersistor: TokenChunkEventPersistor
 ) : PaginationTask {
 
-    override suspend fun execute(params: PaginationTask.Params): Try<TokenChunkEventPersistor.Result> {
+    override suspend fun execute(params: PaginationTask.Params): TokenChunkEventPersistor.Result {
         val filter = filterRepository.getRoomFilter()
-        return executeRequest<PaginationResponse> {
+        val chunk = executeRequest<PaginationResponse> {
             apiCall = roomAPI.getRoomMessagesFrom(params.roomId, params.from, params.direction.value, params.limit, filter)
-        }.flatMap { chunk ->
-            tokenChunkEventPersistor
-                    .insertInDb(chunk, params.roomId, params.direction)
         }
+        return tokenChunkEventPersistor.insertInDb(chunk, params.roomId, params.direction)
     }
 
 }

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

@@ -16,12 +16,10 @@
 
 package im.vector.matrix.android.internal.session.room.timeline
 
-import arrow.core.Try
 import im.vector.matrix.android.api.session.events.model.Event
-import im.vector.matrix.android.internal.task.Task
 import im.vector.matrix.android.internal.network.executeRequest
-import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.session.room.RoomAPI
+import im.vector.matrix.android.internal.task.Task
 import javax.inject.Inject
 
 internal class GetEventTask @Inject constructor(private val roomAPI: RoomAPI
@@ -32,7 +30,7 @@ internal class GetEventTask @Inject constructor(private val roomAPI: RoomAPI
             val eventId: String
     )
 
-    override suspend fun execute(params: Params): Try<Event> {
+    override suspend fun execute(params: Params): Event {
         return executeRequest {
             apiCall = roomAPI.getEvent(params.roomId, params.eventId)
         }

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

@@ -16,7 +16,6 @@
 
 package im.vector.matrix.android.internal.session.room.timeline
 
-import arrow.core.Try
 import com.zhuinden.monarchy.Monarchy
 import im.vector.matrix.android.internal.database.helper.*
 import im.vector.matrix.android.internal.database.model.ChunkEntity
@@ -26,7 +25,7 @@ import im.vector.matrix.android.internal.database.query.find
 import im.vector.matrix.android.internal.database.query.findAllIncludingEvents
 import im.vector.matrix.android.internal.database.query.where
 import im.vector.matrix.android.internal.session.user.UserEntityFactory
-import im.vector.matrix.android.internal.util.tryTransactionSync
+import im.vector.matrix.android.internal.util.awaitTransaction
 import io.realm.kotlin.createObject
 import timber.log.Timber
 import javax.inject.Inject
@@ -104,12 +103,12 @@ internal class TokenChunkEventPersistor @Inject constructor(private val monarchy
         SUCCESS
     }
 
-    fun insertInDb(receivedChunk: TokenChunkEvent,
-                   roomId: String,
-                   direction: PaginationDirection): Try<Result> {
+    suspend fun insertInDb(receivedChunk: TokenChunkEvent,
+                           roomId: String,
+                           direction: PaginationDirection): Result {
 
-        return monarchy
-                .tryTransactionSync { realm ->
+        monarchy
+                .awaitTransaction { realm ->
                     Timber.v("Start persisting ${receivedChunk.events.size} events in $roomId towards $direction")
 
                     val roomEntity = RoomEntity.where(realm, roomId).findFirst()
@@ -127,7 +126,7 @@ internal class TokenChunkEventPersistor @Inject constructor(private val monarchy
 
                     if (ChunkEntity.find(realm, roomId, nextToken = nextToken) != null || ChunkEntity.find(realm, roomId, prevToken = prevToken) != null) {
                         Timber.v("Already inserted - SKIP")
-                        return@tryTransactionSync
+                        return@awaitTransaction
                     }
 
                     val prevChunk = ChunkEntity.find(realm, roomId, nextToken = prevToken)
@@ -181,13 +180,11 @@ internal class TokenChunkEventPersistor @Inject constructor(private val monarchy
                         currentChunk.updateSenderDataFor(eventIds)
                     }
                 }
-                .map {
-                    if (receivedChunk.events.isEmpty() && receivedChunk.stateEvents.isEmpty() && receivedChunk.start != receivedChunk.end) {
-                        Result.SHOULD_FETCH_MORE
-                    } else {
-                        Result.SUCCESS
-                    }
-                }
+        return if (receivedChunk.events.isEmpty() && receivedChunk.stateEvents.isEmpty() && receivedChunk.start != receivedChunk.end) {
+            Result.SHOULD_FETCH_MORE
+        } else {
+            Result.SUCCESS
+        }
     }
 
     private fun handleMerge(roomEntity: RoomEntity,

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/signout/SignOutTask.kt

@@ -16,7 +16,6 @@
 
 package im.vector.matrix.android.internal.session.signout
 
-import arrow.core.Try
 import im.vector.matrix.android.api.auth.data.Credentials
 import im.vector.matrix.android.internal.SessionManager
 import im.vector.matrix.android.internal.auth.SessionParamsStore
@@ -31,15 +30,11 @@ internal class DefaultSignOutTask @Inject constructor(private val credentials: C
                                                       private val sessionManager: SessionManager,
                                                       private val sessionParamsStore: SessionParamsStore) : SignOutTask {
 
-    override suspend fun execute(params: Unit): Try<Unit> {
-        return executeRequest<Unit> {
+    override suspend fun execute(params: Unit) {
+        executeRequest<Unit> {
             apiCall = signOutAPI.signOut()
-        }.flatMap {
-            sessionParamsStore.delete(credentials.userId)
-        }.flatMap {
-            Try {
-                sessionManager.releaseSession(credentials.userId)
-            }
         }
+        sessionParamsStore.delete(credentials.userId)
+        sessionManager.releaseSession(credentials.userId)
     }
 }

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

@@ -16,9 +16,6 @@
 
 package im.vector.matrix.android.internal.session.sync
 
-import arrow.core.Try
-import arrow.core.failure
-import arrow.core.recoverWith
 import com.zhuinden.monarchy.Monarchy
 import im.vector.matrix.android.R
 import im.vector.matrix.android.api.auth.data.Credentials
@@ -30,7 +27,6 @@ import im.vector.matrix.android.internal.session.DefaultInitialSyncProgressServi
 import im.vector.matrix.android.internal.session.filter.FilterRepository
 import im.vector.matrix.android.internal.session.sync.model.SyncResponse
 import im.vector.matrix.android.internal.task.Task
-import im.vector.matrix.android.internal.util.tryTransactionAsync
 import javax.inject.Inject
 
 internal interface SyncTask : Task<SyncTask.Params, Unit> {
@@ -50,7 +46,7 @@ internal class DefaultSyncTask @Inject constructor(private val syncAPI: SyncAPI,
 ) : SyncTask {
 
 
-    override suspend fun execute(params: SyncTask.Params): Try<Unit> {
+    override suspend fun execute(params: SyncTask.Params) {
         val requestParams = HashMap<String, String>()
         var timeout = 0L
         val token = syncTokenStore.getLastToken()
@@ -66,27 +62,22 @@ internal class DefaultSyncTask @Inject constructor(private val syncAPI: SyncAPI,
             initialSyncProgressService.endAll()
             initialSyncProgressService.startTask(R.string.initial_sync_start_importing_account, 100)
         }
-        return executeRequest<SyncResponse> {
-            apiCall = syncAPI.sync(requestParams)
-        }.recoverWith { throwable ->
+        val syncResponse = try {
+            executeRequest<SyncResponse> {
+                apiCall = syncAPI.sync(requestParams)
+            }
+        } catch (throwable: Throwable) {
             // Intercept 401
             if (throwable is Failure.ServerError
                     && throwable.error.code == MatrixError.UNKNOWN_TOKEN) {
                 sessionParamsStore.delete(credentials.userId)
             }
-
-            // Transmit the throwable
-            throwable.failure()
-        }.flatMap { syncResponse ->
-            syncResponseHandler.handleResponse(syncResponse, token, false).also {
-                if (isInitialSync) {
-                    monarchy.tryTransactionAsync {
-                        initialSyncProgressService.endAll()
-                    }
-                }
-            }
-        }.map {
-            syncTokenStore.saveToken(it.nextBatch)
+            throw throwable
+        }
+        syncResponseHandler.handleResponse(syncResponse, token, false)
+        syncTokenStore.saveToken(syncResponse.nextBatch)
+        if (isInitialSync) {
+            initialSyncProgressService.endAll()
         }
     }
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/sync/job/SyncThread.kt

@@ -134,9 +134,12 @@ internal class SyncThread @Inject constructor(private val syncTask: SyncTask,
                                 latch.countDown()
                             }
 
+                            override fun onCanceled() {
+                                latch.countDown()
+                            }
+
                         })
                         .executeBy(taskExecutor)
-
                 latch.await()
                 if (state is SyncState.RUNNING) {
                     updateStateTo(SyncState.RUNNING(afterPause = false))

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/sync/job/SyncWorker.kt

@@ -18,18 +18,15 @@ package im.vector.matrix.android.internal.session.sync.job
 import android.content.Context
 import androidx.work.*
 import com.squareup.moshi.JsonClass
-import im.vector.matrix.android.api.MatrixCallback
-import im.vector.matrix.android.api.util.Cancelable
 import im.vector.matrix.android.internal.session.sync.SyncTask
 import im.vector.matrix.android.internal.task.TaskExecutor
-import im.vector.matrix.android.internal.task.TaskThread
-import im.vector.matrix.android.internal.task.configureWith
+import im.vector.matrix.android.internal.util.MatrixCoroutineDispatchers
 import im.vector.matrix.android.internal.worker.WorkManagerUtil
 import im.vector.matrix.android.internal.worker.WorkManagerUtil.matrixOneTimeWorkRequestBuilder
 import im.vector.matrix.android.internal.worker.WorkerParamsFactory
 import im.vector.matrix.android.internal.worker.getSessionComponent
+import kotlinx.coroutines.withContext
 import timber.log.Timber
-import java.util.concurrent.CountDownLatch
 import java.util.concurrent.TimeUnit
 import javax.inject.Inject
 
@@ -47,45 +44,26 @@ internal class SyncWorker(context: Context,
             val automaticallyRetry: Boolean = false
     )
 
-    @Inject
-    lateinit var syncTask: SyncTask
-    @Inject
-    lateinit var taskExecutor: TaskExecutor
+    @Inject lateinit var syncTask: SyncTask
+    @Inject lateinit var taskExecutor: TaskExecutor
+    @Inject lateinit var coroutineDispatchers: MatrixCoroutineDispatchers
 
     override suspend fun doWork(): Result {
         Timber.i("Sync work starting")
         val params = WorkerParamsFactory.fromData<Params>(inputData) ?: return Result.success()
         val sessionComponent = getSessionComponent(params.userId) ?: return Result.success()
         sessionComponent.inject(this)
-
-
-        val latch = CountDownLatch(1)
-        val taskParams = SyncTask.Params(0)
-        cancelableTask = syncTask.configureWith(taskParams)
-                .callbackOn(TaskThread.SYNC)
-                .executeOn(TaskThread.SYNC)
-                .dispatchTo(object : MatrixCallback<Unit> {
-                    override fun onSuccess(data: Unit) {
-                        latch.countDown()
-                    }
-
-                    override fun onFailure(failure: Throwable) {
-                        Timber.e(failure)
-                        latch.countDown()
-                    }
-
-                })
-                .executeBy(taskExecutor)
-
-        latch.await()
+        runCatching {
+            withContext(coroutineDispatchers.sync) {
+                val taskParams = SyncTask.Params(0)
+                syncTask.execute(taskParams)
+            }
+        }
         return Result.success()
     }
 
     companion object {
 
-
-        private var cancelableTask: Cancelable? = null
-
         fun requireBackgroundSync(context: Context, userId: String, serverTimeout: Long = 0) {
             val data = WorkerParamsFactory.toData(Params(userId, serverTimeout, false))
             val workRequest = matrixOneTimeWorkRequestBuilder<SyncWorker>()
@@ -107,7 +85,6 @@ internal class SyncWorker(context: Context,
         }
 
         fun stopAnyBackgroundSync(context: Context) {
-            cancelableTask?.cancel()
             WorkManager.getInstance(context).cancelUniqueWork("BG_SYNCP")
         }
     }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/user/accountdata/UpdateUserAccountDataTask.kt

@@ -16,7 +16,6 @@
 
 package im.vector.matrix.android.internal.session.user.accountdata
 
-import arrow.core.Try
 import im.vector.matrix.android.api.auth.data.Credentials
 import im.vector.matrix.android.internal.network.executeRequest
 import im.vector.matrix.android.internal.session.sync.model.UserAccountData
@@ -45,8 +44,7 @@ internal interface UpdateUserAccountDataTask : Task<UpdateUserAccountDataTask.Pa
 internal class DefaultUpdateUserAcountDataTask @Inject constructor(private val accountDataApi: AccountDataAPI,
                                                                    private val credentials: Credentials) : UpdateUserAccountDataTask {
 
-    override suspend fun execute(params: UpdateUserAccountDataTask.Params): Try<Unit> {
-
+    override suspend fun execute(params: UpdateUserAccountDataTask.Params) {
         return executeRequest {
             apiCall = accountDataApi.setAccountData(credentials.userId, params.type, params.getData())
         }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/user/model/SearchUserTask.kt

@@ -16,7 +16,6 @@
 
 package im.vector.matrix.android.internal.session.user.model
 
-import arrow.core.Try
 import im.vector.matrix.android.api.session.user.model.User
 import im.vector.matrix.android.internal.network.executeRequest
 import im.vector.matrix.android.internal.session.user.SearchUserAPI
@@ -34,13 +33,12 @@ internal interface SearchUserTask : Task<SearchUserTask.Params, List<User>> {
 
 internal class DefaultSearchUserTask @Inject constructor(private val searchUserAPI: SearchUserAPI) : SearchUserTask {
 
-    override suspend fun execute(params: SearchUserTask.Params): Try<List<User>> {
-        return executeRequest<SearchUsersRequestResponse> {
+    override suspend fun execute(params: SearchUserTask.Params): List<User> {
+        val response = executeRequest<SearchUsersRequestResponse> {
             apiCall = searchUserAPI.searchUsers(SearchUsersParams(params.search, params.limit))
-        }.map { response ->
-            response.users.map {
-                User(it.userId, it.displayName, it.avatarUrl)
-            }
+        }
+        return response.users.map {
+            User(it.userId, it.displayName, it.avatarUrl)
         }
     }
 

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/task/ConfigurableTask.kt

@@ -16,7 +16,6 @@
 
 package im.vector.matrix.android.internal.task
 
-import arrow.core.Try
 import im.vector.matrix.android.api.MatrixCallback
 import im.vector.matrix.android.api.util.Cancelable
 
@@ -41,7 +40,7 @@ internal data class ConfigurableTask<PARAMS, RESULT>(
 ) : Task<PARAMS, RESULT> {
 
 
-    override suspend fun execute(params: PARAMS): Try<RESULT> {
+    override suspend fun execute(params: PARAMS): RESULT {
         return task.execute(params)
     }
 

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/task/Task.kt

@@ -16,11 +16,9 @@
 
 package im.vector.matrix.android.internal.task
 
-import arrow.core.Try
-
 internal interface Task<PARAMS, RESULT> {
 
-    suspend fun execute(params: PARAMS): Try<RESULT>
+    suspend fun execute(params: PARAMS): RESULT
 
 }
 

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/task/TaskExecutor.kt

@@ -17,10 +17,10 @@
 package im.vector.matrix.android.internal.task
 
 
-import arrow.core.Try
 import im.vector.matrix.android.api.util.Cancelable
+import im.vector.matrix.android.api.util.CancelableBag
+import im.vector.matrix.android.internal.di.MatrixScope
 import im.vector.matrix.android.internal.extensions.foldToCallback
-import im.vector.matrix.android.internal.extensions.onError
 import im.vector.matrix.android.internal.util.CancelableCoroutine
 import im.vector.matrix.android.internal.util.MatrixCoroutineDispatchers
 import kotlinx.coroutines.GlobalScope
@@ -31,24 +31,35 @@ import timber.log.Timber
 import javax.inject.Inject
 import kotlin.coroutines.EmptyCoroutineContext
 
+@MatrixScope
 internal class TaskExecutor @Inject constructor(private val coroutineDispatchers: MatrixCoroutineDispatchers) {
 
+    private val cancelableBag = CancelableBag()
+
     fun <PARAMS, RESULT> execute(task: ConfigurableTask<PARAMS, RESULT>): Cancelable {
 
         val job = GlobalScope.launch(task.callbackThread.toDispatcher()) {
-            val resultOrFailure = withContext(task.executionThread.toDispatcher()) {
-                Timber.v("Executing $task on ${Thread.currentThread().name}")
-                retry(task.retryCount) {
-                    task.execute(task.params)
+            val resultOrFailure = runCatching {
+                withContext(task.executionThread.toDispatcher()) {
+                    Timber.v("Executing $task on ${Thread.currentThread().name}")
+                    retry(task.retryCount) {
+                        task.execute(task.params)
+                    }
                 }
             }
             resultOrFailure
-                    .onError {
+                    .onFailure {
                         Timber.d(it, "Task failed")
                     }
                     .foldToCallback(task.callback)
         }
-        return CancelableCoroutine(job)
+        return CancelableCoroutine(job, task.callback).also {
+            cancelableBag += it
+        }
+    }
+
+    fun cancelAll() = synchronized(this) {
+        cancelableBag.cancel()
     }
 
     private suspend fun <T> retry(
@@ -56,14 +67,13 @@ internal class TaskExecutor @Inject constructor(private val coroutineDispatchers
             initialDelay: Long = 100, // 0.1 second
             maxDelay: Long = 10_000,    // 10 second
             factor: Double = 2.0,
-            block: suspend () -> Try<T>): Try<T> {
+            block: suspend () -> T): T {
 
         var currentDelay = initialDelay
         repeat(times - 1) {
-            val blockResult = block()
-            if (blockResult.isSuccess()) {
-                return blockResult
-            } else {
+            try {
+                return block()
+            } catch (e: Exception) {
                 delay(currentDelay)
                 currentDelay = (currentDelay * factor).toLong().coerceAtMost(maxDelay)
             }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/util/CancelableCoroutine.kt

@@ -16,13 +16,17 @@
 
 package im.vector.matrix.android.internal.util
 
+import im.vector.matrix.android.api.MatrixCallback
 import im.vector.matrix.android.api.util.Cancelable
 import kotlinx.coroutines.Job
 
-internal class CancelableCoroutine(private val job: Job) : Cancelable {
+internal class CancelableCoroutine(private val job: Job, private val callback: MatrixCallback<*>) : Cancelable {
 
     override fun cancel() {
-        job.cancel()
+        if (!job.isCancelled) {
+            job.cancel()
+            callback.onCanceled()
+        }
     }
 
 }