Merge branch 'release/0.3.0'

CHANGES.md

@@ -1,3 +1,34 @@
+Changes in RiotX 0.3.0 (2019-08-08)
+===================================================
+
+Features:
+ - Create Direct Room flow
+ - Handle `/markdown` command
+
+Improvements:
+ - UI for pending edits (#193)
+ - UX image preview screen transition (#393)
+ - Basic support for resending failed messages (retry/remove)
+ - Enable proper cancellation of suspending functions (including db transaction)
+ - Enhances network connectivity checks in SDK
+ - Add "View Edit History" item in the message bottom sheet (#401)
+ - Cancel sync request on pause and timeout to 0 after pause (#404)
+
+Other changes:
+ - Show sync progress also in room detail screen (#403)
+
+Bugfix:
+ - Edited message: link confusion when (edited) appears in body (#398)
+ - Close detail room screen when the room is left with another client (#256)
+ - Clear notification for a room left on another client
+ - Fix messages with empty `in_reply_to` not rendering (#447)
+ - Fix clear cache (#408) and Logout (#205)
+ - Fix `(edited)` link can be copied to clipboard (#402)
+
+Build:
+ - Split APK: generate one APK per arch, to reduce APK size of about 30%
+
+
 Changes in RiotX 0.2.0 (2019-07-18)
 ===================================================
 
@@ -36,7 +67,7 @@ Mode details here: https://medium.com/@RiotChat/introducing-the-riotx-beta-for-a
 =======================================================
 
 
-Changes in RiotX 0.XX (2019-XX-XX)
+Changes in RiotX 0.0.0 (2019-XX-XX)
 ===================================================
 
 Features:

matrix-sdk-android-rx/build.gradle

@@ -33,11 +33,12 @@ android {
 }
 
 dependencies {
-    implementation fileTree(dir: 'libs', include: ['*.jar'])
     implementation project(":matrix-sdk-android")
     implementation 'androidx.appcompat:appcompat:1.1.0-beta01'
     implementation 'io.reactivex.rxjava2:rxkotlin:2.3.0'
     implementation 'io.reactivex.rxjava2:rxandroid:2.1.1'
+    // Paging
+    implementation "androidx.paging:paging-runtime-ktx:2.1.0"
 
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'androidx.test:runner:1.2.0'

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

@@ -20,6 +20,8 @@ import androidx.lifecycle.LiveData
 import androidx.lifecycle.Observer
 import io.reactivex.Observable
 import io.reactivex.android.MainThreadDisposable
+import io.reactivex.android.schedulers.AndroidSchedulers
+import io.reactivex.schedulers.Schedulers
 
 private class LiveDataObservable<T>(
         private val liveData: LiveData<T>,
@@ -57,5 +59,5 @@ private class LiveDataObservable<T>(
 }
 
 fun <T> LiveData<T>.asObservable(): Observable<T> {
-    return LiveDataObservable(this)
+    return LiveDataObservable(this).observeOn(Schedulers.computation())
 }

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

@@ -0,0 +1,39 @@
+/*
+ * 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.rx
+
+import im.vector.matrix.android.api.MatrixCallback
+import im.vector.matrix.android.api.util.Cancelable
+import io.reactivex.CompletableEmitter
+import io.reactivex.SingleEmitter
+
+internal class MatrixCallbackCompletable<T>(private val completableEmitter: CompletableEmitter) : MatrixCallback<T> {
+
+    override fun onSuccess(data: T) {
+        completableEmitter.onComplete()
+    }
+
+    override fun onFailure(failure: Throwable) {
+        completableEmitter.tryOnError(failure)
+    }
+}
+
+fun Cancelable.toCompletable(completableEmitter: CompletableEmitter) {
+    completableEmitter.setCancellable {
+        this.cancel()
+    }
+}

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

@@ -0,0 +1,38 @@
+/*
+ * 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.rx
+
+import im.vector.matrix.android.api.MatrixCallback
+import im.vector.matrix.android.api.util.Cancelable
+import io.reactivex.SingleEmitter
+
+internal class MatrixCallbackSingle<T>(private val singleEmitter: SingleEmitter<T>) : MatrixCallback<T> {
+
+    override fun onSuccess(data: T) {
+        singleEmitter.onSuccess(data)
+    }
+
+    override fun onFailure(failure: Throwable) {
+        singleEmitter.tryOnError(failure)
+    }
+}
+
+fun <T> Cancelable.toSingle(singleEmitter: SingleEmitter<T>) {
+    singleEmitter.setCancellable {
+        this.cancel()
+    }
+}

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

@@ -21,24 +21,32 @@ import im.vector.matrix.android.api.session.room.model.EventAnnotationsSummary
 import im.vector.matrix.android.api.session.room.model.RoomSummary
 import im.vector.matrix.android.api.session.room.timeline.TimelineEvent
 import io.reactivex.Observable
-import io.reactivex.schedulers.Schedulers
+import io.reactivex.Single
 
 class RxRoom(private val room: Room) {
 
     fun liveRoomSummary(): Observable<RoomSummary> {
-        return room.liveRoomSummary().asObservable().observeOn(Schedulers.computation())
+        return room.liveRoomSummary().asObservable()
     }
 
     fun liveRoomMemberIds(): Observable<List<String>> {
-        return room.getRoomMemberIdsLive().asObservable().observeOn(Schedulers.computation())
+        return room.getRoomMemberIdsLive().asObservable()
     }
 
     fun liveAnnotationSummary(eventId: String): Observable<EventAnnotationsSummary> {
-        return room.getEventSummaryLive(eventId).asObservable().observeOn(Schedulers.computation())
+        return room.getEventSummaryLive(eventId).asObservable()
     }
 
     fun liveTimelineEvent(eventId: String): Observable<TimelineEvent> {
-        return room.liveTimeLineEvent(eventId).asObservable().observeOn(Schedulers.computation())
+        return room.liveTimeLineEvent(eventId).asObservable()
+    }
+
+    fun loadRoomMembersIfNeeded(): Single<Unit> = Single.create {
+        room.loadRoomMembersIfNeeded(MatrixCallbackSingle(it)).toSingle(it)
+    }
+
+    fun joinRoom(viaServers: List<String> = emptyList()): Single<Unit> = Single.create {
+        room.join(viaServers, MatrixCallbackSingle(it)).toSingle(it)
     }
 
 }

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

@@ -16,30 +16,55 @@
 
 package im.vector.matrix.rx
 
+import androidx.paging.PagedList
 import im.vector.matrix.android.api.session.Session
 import im.vector.matrix.android.api.session.group.model.GroupSummary
 import im.vector.matrix.android.api.session.pushers.Pusher
 import im.vector.matrix.android.api.session.room.model.RoomSummary
+import im.vector.matrix.android.api.session.room.model.create.CreateRoomParams
 import im.vector.matrix.android.api.session.sync.SyncState
+import im.vector.matrix.android.api.session.user.model.User
 import io.reactivex.Observable
-import io.reactivex.schedulers.Schedulers
+import io.reactivex.Single
 
 class RxSession(private val session: Session) {
 
     fun liveRoomSummaries(): Observable<List<RoomSummary>> {
-        return session.liveRoomSummaries().asObservable().observeOn(Schedulers.computation())
+        return session.liveRoomSummaries().asObservable()
     }
 
     fun liveGroupSummaries(): Observable<List<GroupSummary>> {
-        return session.liveGroupSummaries().asObservable().observeOn(Schedulers.computation())
+        return session.liveGroupSummaries().asObservable()
     }
 
     fun liveSyncState(): Observable<SyncState> {
-        return session.syncState().asObservable().observeOn(Schedulers.computation())
+        return session.syncState().asObservable()
     }
 
     fun livePushers(): Observable<List<Pusher>> {
-        return session.livePushers().asObservable().observeOn(Schedulers.computation())
+        return session.livePushers().asObservable()
+    }
+
+    fun liveUsers(): Observable<List<User>> {
+        return session.liveUsers().asObservable()
+    }
+
+    fun livePagedUsers(filter: String? = null): Observable<PagedList<User>> {
+        return session.livePagedUsers(filter).asObservable()
+    }
+
+    fun createRoom(roomParams: CreateRoomParams): Single<String> = Single.create {
+        session.createRoom(roomParams, MatrixCallbackSingle(it)).toSingle(it)
+    }
+
+    fun searchUsersDirectory(search: String,
+                             limit: Int,
+                             excludedUserIds: Set<String>): Single<List<User>> = Single.create {
+        session.searchUsersDirectory(search, limit, excludedUserIds, MatrixCallbackSingle(it)).toSingle(it)
+    }
+
+    fun joinRoom(roomId: String, viaServers: List<String> = emptyList()): Single<Unit> = Single.create {
+        session.joinRoom(roomId, viaServers, MatrixCallbackSingle(it)).toSingle(it)
     }
 
 }

matrix-sdk-android/build.gradle

@@ -94,7 +94,6 @@ dependencies {
     def markwon_version = '3.0.0'
     def daggerVersion = '2.23.1'
 
-    implementation fileTree(dir: 'libs', include: ['*.aar'])
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
     implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:$coroutines_version"
     implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:$coroutines_version"
@@ -110,7 +109,7 @@ dependencies {
     implementation 'com.squareup.retrofit2:converter-moshi:2.4.0'
     implementation 'com.squareup.okhttp3:okhttp:3.14.1'
     implementation 'com.squareup.okhttp3:logging-interceptor:3.10.0'
-    implementation 'com.novoda:merlin:1.1.6'
+    implementation 'com.novoda:merlin:1.2.0'
     implementation "com.squareup.moshi:moshi-adapters:$moshi_version"
     kapt "com.squareup.moshi:moshi-kotlin-codegen:$moshi_version"
 
@@ -126,9 +125,6 @@ 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/LiveDataTestObserver.java

@@ -16,10 +16,10 @@
 
 package im.vector.matrix.android;
 
+import androidx.annotation.Nullable;
 import androidx.lifecycle.LiveData;
 import androidx.lifecycle.MutableLiveData;
 import androidx.lifecycle.Observer;
-import androidx.annotation.Nullable;
 
 import java.util.ArrayList;
 import java.util.Collections;

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

@@ -19,11 +19,7 @@ package im.vector.matrix.android.session.room.timeline
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import com.zhuinden.monarchy.Monarchy
 import im.vector.matrix.android.InstrumentedTest
-import im.vector.matrix.android.internal.database.helper.add
-import im.vector.matrix.android.internal.database.helper.addAll
-import im.vector.matrix.android.internal.database.helper.isUnlinked
-import im.vector.matrix.android.internal.database.helper.lastStateIndex
-import im.vector.matrix.android.internal.database.helper.merge
+import im.vector.matrix.android.internal.database.helper.*
 import im.vector.matrix.android.internal.database.model.ChunkEntity
 import im.vector.matrix.android.internal.session.room.timeline.PaginationDirection
 import im.vector.matrix.android.session.room.timeline.RoomDataHelper.createFakeListOfEvents

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/MatrixPatterns.kt

@@ -28,7 +28,7 @@ object MatrixPatterns {
     // regex pattern to find matrix user ids in a string.
     // See https://matrix.org/speculator/spec/HEAD/appendices.html#historical-user-ids
     private const val MATRIX_USER_IDENTIFIER_REGEX = "@[A-Z0-9\\x21-\\x39\\x3B-\\x7F]+$DOMAIN_REGEX"
-    private val PATTERN_CONTAIN_MATRIX_USER_IDENTIFIER = MATRIX_USER_IDENTIFIER_REGEX.toRegex(RegexOption.IGNORE_CASE)
+    val PATTERN_CONTAIN_MATRIX_USER_IDENTIFIER = MATRIX_USER_IDENTIFIER_REGEX.toRegex(RegexOption.IGNORE_CASE)
 
     // regex pattern to find room ids in a string.
     private const val MATRIX_ROOM_IDENTIFIER_REGEX = "![A-Z0-9]+$DOMAIN_REGEX"
@@ -137,4 +137,23 @@ object MatrixPatterns {
     fun isGroupId(str: String?): Boolean {
         return str != null && str matches PATTERN_CONTAIN_MATRIX_GROUP_IDENTIFIER
     }
+
+    /**
+     * Extract server name from a matrix id
+     *
+     * @param matrixId
+     * @return null if not found or if matrixId is null
+     */
+    fun extractServerNameFromId(matrixId: String?): String? {
+        if (matrixId == null) {
+            return null
+        }
+
+        val index = matrixId.indexOf(":")
+
+        return if (index == -1) {
+            null
+        } else matrixId.substring(index + 1)
+
+    }
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/api/auth/data/HomeServerConnectionConfig.kt

@@ -31,7 +31,7 @@ import okhttp3.TlsVersion
 @JsonClass(generateAdapter = true)
 data class HomeServerConnectionConfig(
         val homeServerUri: Uri,
-        val identityServerUri: Uri,
+        val identityServerUri: Uri? = null,
         val antiVirusServerUri: Uri? = null,
         val allowedFingerprints: MutableList<Fingerprint> = ArrayList(),
         val shouldPin: Boolean = false,
@@ -48,7 +48,7 @@ data class HomeServerConnectionConfig(
     class Builder {
 
         private lateinit var homeServerUri: Uri
-        private lateinit var identityServerUri: Uri
+        private var identityServerUri: Uri? = null
         private var antiVirusServerUri: Uri? = null
         private val allowedFingerprints: MutableList<Fingerprint> = ArrayList()
         private var shouldPin: Boolean = false

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

@@ -26,8 +26,13 @@ import com.squareup.moshi.JsonClass
 @JsonClass(generateAdapter = true)
 data class MatrixError(
         @Json(name = "errcode") val code: String,
-        @Json(name = "error") val message: String
-) {
+        @Json(name = "error") val message: String,
+
+        @Json(name = "consent_uri") val consentUri: String? = null,
+        // RESOURCE_LIMIT_EXCEEDED data
+        @Json(name = "limit_type") val limitType: String? = null,
+        @Json(name = "admin_contact") val adminUri: String? = null) {
+
 
     companion object {
         const val FORBIDDEN = "M_FORBIDDEN"
@@ -55,5 +60,8 @@ data class MatrixError(
         const val M_CONSENT_NOT_GIVEN = "M_CONSENT_NOT_GIVEN"
         const val RESOURCE_LIMIT_EXCEEDED = "M_RESOURCE_LIMIT_EXCEEDED"
         const val WRONG_ROOM_KEYS_VERSION = "M_WRONG_ROOM_KEYS_VERSION"
+
+        // Possible value for "limit_type"
+        const val LIMIT_TYPE_MAU = "monthly_active_user"
     }
 }

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

@@ -18,6 +18,7 @@ package im.vector.matrix.android.api.permalinks
 
 import android.text.style.ClickableSpan
 import android.view.View
+import im.vector.matrix.android.api.permalinks.MatrixPermalinkSpan.Callback
 
 /**
  * This MatrixPermalinkSpan is a clickable span which use a [Callback] to communicate back.

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

@@ -18,6 +18,7 @@ package im.vector.matrix.android.api.pushrules
 import im.vector.matrix.android.api.MatrixCallback
 import im.vector.matrix.android.api.pushrules.rest.PushRule
 import im.vector.matrix.android.api.session.events.model.Event
+import im.vector.matrix.android.api.util.Cancelable
 
 interface PushRuleService {
 
@@ -31,7 +32,7 @@ interface PushRuleService {
 
     //TODO update rule
 
-    fun updatePushRuleEnableStatus(kind: String, pushRule: PushRule, enabled: Boolean, callback: MatrixCallback<Unit>)
+    fun updatePushRuleEnableStatus(kind: String, pushRule: PushRule, enabled: Boolean, callback: MatrixCallback<Unit>): Cancelable
 
     fun addPushRuleListener(listener: PushRuleListener)
 
@@ -41,6 +42,7 @@ interface PushRuleService {
 
     interface PushRuleListener {
         fun onMatchRule(event: Event, actions: List<Action>)
+        fun onRoomLeft(roomId: String)
         fun batchFinish()
     }
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/crypto/CryptoService.kt

@@ -26,14 +26,12 @@ 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.internal.crypto.MXEventDecryptionResult
 import im.vector.matrix.android.internal.crypto.NewSessionListener
-import im.vector.matrix.android.internal.crypto.attachments.ElementToDecrypt
 import im.vector.matrix.android.internal.crypto.model.ImportRoomKeysResult
 import im.vector.matrix.android.internal.crypto.model.MXDeviceInfo
 import im.vector.matrix.android.internal.crypto.model.MXEncryptEventContentResult
 import im.vector.matrix.android.internal.crypto.model.MXUsersDevicesMap
 import im.vector.matrix.android.internal.crypto.model.rest.DevicesListResponse
 import im.vector.matrix.android.internal.crypto.model.rest.RoomKeyRequestBody
-import java.io.File
 
 interface CryptoService {
 

matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/events/model/Event.kt

@@ -20,6 +20,9 @@ import android.text.TextUtils
 import com.squareup.moshi.Json
 import com.squareup.moshi.JsonClass
 import im.vector.matrix.android.api.session.crypto.MXCryptoError
+import im.vector.matrix.android.api.session.room.model.message.MessageContent
+import im.vector.matrix.android.api.session.room.model.message.MessageType
+import im.vector.matrix.android.api.session.room.send.SendState
 import im.vector.matrix.android.api.util.JsonDict
 import im.vector.matrix.android.internal.crypto.algorithms.olm.OlmDecryptionResult
 import im.vector.matrix.android.internal.di.MoshiProvider
@@ -79,9 +82,15 @@ data class Event(
 ) {
 
 
+    @Transient
     var mxDecryptionResult: OlmDecryptionResult? = null
+
+    @Transient
     var mCryptoError: MXCryptoError.ErrorType? = null
 
+    @Transient
+    var sendState: SendState = SendState.UNKNOWN
+
 
     /**
      * Check if event is a state event.
@@ -95,42 +104,6 @@ data class Event(
     // Crypto
     //==============================================================================================================
 
-//    /**
-//     * For encrypted events, the plaintext payload for the event.
-//     * This is a small MXEvent instance with typically value for `type` and 'content' fields.
-//     */
-//    @Transient
-//    var mClearEvent: Event? = null
-//        private set
-//
-//    /**
-//     * Curve25519 key which we believe belongs to the sender of the event.
-//     * See `senderKey` property.
-//     */
-//    @Transient
-//    private var mSenderCurve25519Key: String? = null
-//
-//    /**
-//     * Ed25519 key which the sender of this event (for olm) or the creator of the megolm session (for megolm) claims to own.
-//     * See `claimedEd25519Key` property.
-//     */
-//    @Transient
-//    private var mClaimedEd25519Key: String? = null
-//
-//    /**
-//     * Curve25519 keys of devices involved in telling us about the senderCurve25519Key and claimedEd25519Key.
-//     * See `forwardingCurve25519KeyChain` property.
-//     */
-//    @Transient
-//    private var mForwardingCurve25519KeyChain: List<String> = ArrayList()
-//
-//    /**
-//     * Decryption error
-//     */
-//    @Transient
-//    var mCryptoError: MXCryptoError? = null
-//        private set
-
     /**
      * @return true if this event is encrypted.
      */
@@ -138,51 +111,11 @@ data class Event(
         return TextUtils.equals(type, EventType.ENCRYPTED)
     }
 
-    /**
-     * Update the clear data on this event.
-     * This is used after decrypting an event; it should not be used by applications.
-     *
-     * @param decryptionResult the decryption result, including the plaintext and some key info.
-     */
-//    internal fun setClearData(decryptionResult: MXEventDecryptionResult?) {
-//        mClearEvent = null
-//        if (decryptionResult != null) {
-//            if (decryptionResult.clearEvent != null) {
-//                val adapter = MoshiProvider.providesMoshi().adapter(Event::class.java)
-//                mClearEvent = adapter.fromJsonValue(decryptionResult.clearEvent)
-//
-//                if (mClearEvent != null) {
-//                    mSenderCurve25519Key = decryptionResult.senderCurve25519Key
-//                    mClaimedEd25519Key = decryptionResult.claimedEd25519Key
-//                    mForwardingCurve25519KeyChain = decryptionResult.forwardingCurve25519KeyChain
-//
-//                    // For encrypted events with relation, the m.relates_to is kept in clear, so we need to put it back
-//                    // in the clear event
-//                    try {
-//                        content?.get("m.relates_to")?.let { clearRelates ->
-//                            mClearEvent = mClearEvent?.copy(
-//                                    content = HashMap(mClearEvent!!.content).apply {
-//                                        this["m.relates_to"] = clearRelates
-//                                    }
-//                            )
-//                        }
-//                    } catch (e: Exception) {
-//                        Timber.e(e, "Unable to restore 'm.relates_to' the clear event")
-//                    }
-//                }
-//
-//
-//            }
-//        }
-//        mCryptoError = null
-//    }
-
     /**
      * @return The curve25519 key that sent this event.
      */
     fun getSenderKey(): String? {
         return mxDecryptionResult?.senderKey
-        // return mClearEvent?.mSenderCurve25519Key ?: mSenderCurve25519Key
     }
 
     /**
@@ -190,23 +123,13 @@ data class Event(
      */
     fun getKeysClaimed(): Map<String, String> {
         return mxDecryptionResult?.keysClaimed ?: HashMap()
-//        val res = HashMap<String, String>()
-//
-//        val claimedEd25519Key = if (null != mClearEvent) mClearEvent!!.mClaimedEd25519Key else mClaimedEd25519Key
-//
-//        if (null != claimedEd25519Key) {
-//            res["ed25519"] = claimedEd25519Key
-//        }
-//
-//        return res
     }
-//
+
     /**
      * @return the event type
      */
     fun getClearType(): String {
-        return mxDecryptionResult?.payload?.get("type")?.toString()
-                ?: type//get("type")?.toString() ?: type
+        return mxDecryptionResult?.payload?.get("type")?.toString() ?: type
     }
 
     /**
@@ -216,30 +139,8 @@ data class Event(
         return mxDecryptionResult?.payload?.get("content") as? Content ?: content
     }
 
-//    /**
-//     * @return the linked crypto error
-//     */
-//    fun getCryptoError(): MXCryptoError? {
-//        return mCryptoError
-//    }
-//
-//    /**
-//     * Update the linked crypto error
-//     *
-//     * @param error the new crypto error.
-//     */
-//    fun setCryptoError(error: MXCryptoError?) {
-//        mCryptoError = error
-//        if (null != error) {
-//            mClearEvent = null
-//        }
-//    }
-
-
     fun toContentStringWithIndent(): String {
-        val contentMap = this.toContent()?.toMutableMap() ?: HashMap()
-        contentMap.remove("mxDecryptionResult")
-        contentMap.remove("mCryptoError")
+        val contentMap = toContent()?.toMutableMap() ?: HashMap()
         return JSONObject(contentMap).toString(4)
     }
 
@@ -272,6 +173,7 @@ data class Event(
         if (redacts != other.redacts) return false
         if (mxDecryptionResult != other.mxDecryptionResult) return false
         if (mCryptoError != other.mCryptoError) return false
+        if (sendState != other.sendState) return false
 
         return true
     }
@@ -289,6 +191,27 @@ data class Event(
         result = 31 * result + (redacts?.hashCode() ?: 0)
         result = 31 * result + (mxDecryptionResult?.hashCode() ?: 0)
         result = 31 * result + (mCryptoError?.hashCode() ?: 0)
+        result = 31 * result + sendState.hashCode()
         return result
     }
+
+}
+
+
+fun Event.isTextMessage(): Boolean {
+    return getClearType() == EventType.MESSAGE
+            && when (getClearContent()?.toModel<MessageContent>()?.type) {
+        MessageType.MSGTYPE_TEXT,
+        MessageType.MSGTYPE_EMOTE,
+        MessageType.MSGTYPE_NOTICE -> true
+        else                       -> false
+    }
+}
+
+fun Event.isImageMessage(): Boolean {
+    return getClearType() == EventType.MESSAGE
+            && when (getClearContent()?.toModel<MessageContent>()?.type) {
+        MessageType.MSGTYPE_IMAGE -> true
+        else                      -> false
+    }
 }

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

@@ -30,20 +30,17 @@ interface RoomDirectoryService {
     /**
      * Get rooms from directory
      */
-    fun getPublicRooms(server: String?,
-                       publicRoomsParams: PublicRoomsParams,
-                       callback: MatrixCallback<PublicRoomsResponse>): Cancelable
+    fun getPublicRooms(server: String?, publicRoomsParams: PublicRoomsParams, callback: MatrixCallback<PublicRoomsResponse>): Cancelable
 
     /**
      * Join a room by id
      */
-    fun joinRoom(roomId: String,
-                 callback: MatrixCallback<Unit>)
+    fun joinRoom(roomId: String, callback: MatrixCallback<Unit>): Cancelable
 
     /**
      * Fetches the overall metadata about protocols supported by the homeserver.
      * Includes both the available protocols and all fields required for queries against each protocol.
      */
-    fun getThirdPartyProtocol(callback: MatrixCallback<Map<String, ThirdPartyProtocol>>)
+    fun getThirdPartyProtocol(callback: MatrixCallback<Map<String, ThirdPartyProtocol>>): Cancelable
 
 }

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

@@ -20,6 +20,7 @@ import androidx.lifecycle.LiveData
 import im.vector.matrix.android.api.MatrixCallback
 import im.vector.matrix.android.api.session.room.model.RoomSummary
 import im.vector.matrix.android.api.session.room.model.create.CreateRoomParams
+import im.vector.matrix.android.api.util.Cancelable
 
 /**
  * This interface defines methods to get rooms. It's implemented at the session level.
@@ -27,10 +28,18 @@ import im.vector.matrix.android.api.session.room.model.create.CreateRoomParams
 interface RoomService {
 
     /**
-     * Create a room
+     * Create a room asynchronously
      */
-    fun createRoom(createRoomParams: CreateRoomParams,
-                   callback: MatrixCallback<String>)
+    fun createRoom(createRoomParams: CreateRoomParams, callback: MatrixCallback<String>): Cancelable
+
+    /**
+     * Join a room by id
+     * @param roomId the roomId of the room to join
+     * @param viaServers the servers to attempt to join the room through. One of the servers must be participating in the room.
+     */
+    fun joinRoom(roomId: String,
+                 viaServers: List<String> = emptyList(),
+                 callback: MatrixCallback<Unit>): Cancelable
 
     /**
      * Get a room from a roomId

matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/failure/CreateRoomFailure.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.api.session.room.failure
+
+import im.vector.matrix.android.api.failure.Failure
+
+sealed class CreateRoomFailure : Failure.FeatureFailure() {
+
+    object CreatedWithTimeout: CreateRoomFailure()
+
+}

matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/failure/JoinRoomFailure.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.api.session.room.failure
+
+import im.vector.matrix.android.api.failure.Failure
+
+sealed class JoinRoomFailure : Failure.FeatureFailure() {
+
+    object JoinedWithTimeout : JoinRoomFailure()
+
+}

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(): Cancelable
+    fun loadRoomMembersIfNeeded(matrixCallback: MatrixCallback<Unit>): Cancelable
 
     /**
      * Return the roomMember with userId or null.
@@ -52,16 +52,17 @@ interface MembershipService {
     /**
      * Invite a user in the room
      */
-    fun invite(userId: String, callback: MatrixCallback<Unit>)
+    fun invite(userId: String, callback: MatrixCallback<Unit>): Cancelable
 
     /**
      * Join the room, or accept an invitation.
      */
-    fun join(callback: MatrixCallback<Unit>)
+
+    fun join(viaServers: List<String> = emptyList(), callback: MatrixCallback<Unit>): Cancelable
 
     /**
      * Leave the room, or reject an invitation.
      */
-    fun leave(callback: MatrixCallback<Unit>)
+    fun leave(callback: MatrixCallback<Unit>): Cancelable
 
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/RoomSummary.kt

@@ -34,5 +34,10 @@ data class RoomSummary(
         val notificationCount: Int = 0,
         val highlightCount: Int = 0,
         val tags: List<RoomTag> = emptyList(),
-        val membership: Membership = Membership.NONE
-)
+        val membership: Membership = Membership.NONE,
+        val versioningState: VersioningState = VersioningState.NONE
+) {
+
+    val isVersioned: Boolean
+        get() = versioningState != VersioningState.NONE
+}

matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/VersioningState.kt

@@ -0,0 +1,23 @@
+/*
+ * 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.api.session.room.model
+
+enum class VersioningState {
+    NONE,
+    UPGRADED_ROOM_NOT_JOINED,
+    UPGRADED_ROOM_JOINED
+}

matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/create/CreateRoomParams.kt

@@ -223,11 +223,10 @@ class CreateRoomParams {
                           credentials: Credentials,
                           ids: List<String>) {
         for (id in ids) {
-            if (Patterns.EMAIL_ADDRESS.matcher(id).matches()) {
+            if (Patterns.EMAIL_ADDRESS.matcher(id).matches() && hsConfig.identityServerUri != null) {
                 if (null == invite3pids) {
                     invite3pids = ArrayList()
                 }
-
                 val pid = Invite3Pid(idServer = hsConfig.identityServerUri.host!!,
                                      medium = ThreePidMedium.EMAIL,
                                      address = id)

matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/create/Predecessor.kt

@@ -0,0 +1,28 @@
+/*
+ * 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.api.session.room.model.create
+
+import com.squareup.moshi.Json
+import com.squareup.moshi.JsonClass
+
+/**
+ * A link to an old room in case of room versioning
+ */
+@JsonClass(generateAdapter = true)
+data class Predecessor(
+        @Json(name = "room_id") val roomId: String? = null,
+        @Json(name = "event_id") val eventId: String? = null
+)

matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/create/RoomCreateContent.kt

@@ -0,0 +1,32 @@
+/*
+ * 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.api.session.room.model.create
+
+import com.squareup.moshi.Json
+import com.squareup.moshi.JsonClass
+
+/**
+ * Content of a m.room.create type event
+ */
+@JsonClass(generateAdapter = true)
+data class RoomCreateContent(
+        @Json(name = "creator") val creator: String? = null,
+        @Json(name = "room_version") val roomVersion: String? = null,
+        @Json(name = "predecessor") val predecessor: Predecessor? = null
+)
+
+

matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/message/MessageContent.kt

@@ -29,5 +29,5 @@ interface MessageContent {
 
 
 fun MessageContent?.isReply(): Boolean {
-    return this?.relatesTo?.inReplyTo != null
+    return this?.relatesTo?.inReplyTo?.eventId != null
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/relation/ReplyToContent.kt

@@ -21,5 +21,5 @@ import com.squareup.moshi.JsonClass
 
 @JsonClass(generateAdapter = true)
 data class ReplyToContent(
-        @Json(name = "event_id") val eventId: String
+        @Json(name = "event_id") val eventId: String? = null
 )

matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/model/tombstone/RoomTombstoneContent.kt

@@ -0,0 +1,28 @@
+/*
+ * 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.api.session.room.model.tombstone
+
+import com.squareup.moshi.Json
+import com.squareup.moshi.JsonClass
+
+/**
+ * Class to contains Tombstone information
+ */
+@JsonClass(generateAdapter = true)
+data class RoomTombstoneContent(
+        @Json(name = "body") val body: String? = null,
+        @Json(name = "replacement_room") val replacementRoom: String?
+)

matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/send/SendService.kt

@@ -19,6 +19,7 @@ package im.vector.matrix.android.api.session.room.send
 import im.vector.matrix.android.api.session.content.ContentAttachmentData
 import im.vector.matrix.android.api.session.events.model.Event
 import im.vector.matrix.android.api.session.room.model.message.MessageType
+import im.vector.matrix.android.api.session.room.timeline.TimelineEvent
 import im.vector.matrix.android.api.util.Cancelable
 
 
@@ -65,4 +66,31 @@ interface SendService {
      */
     fun redactEvent(event: Event, reason: String?): Cancelable
 
+
+    /**
+     * Schedule this message to be resent
+     * @param localEcho the unsent local echo
+     */
+    fun resendTextMessage(localEcho: TimelineEvent): Cancelable?
+
+    /**
+     * Schedule this message to be resent
+     * @param localEcho the unsent local echo
+     */
+    fun resendMediaMessage(localEcho: TimelineEvent): Cancelable?
+
+
+    /**
+     * Remove this failed message from the timeline
+     * @param localEcho the unsent local echo
+     */
+    fun deleteFailedEcho(localEcho: TimelineEvent)
+
+    fun clearSendingQueue()
+
+    /**
+     * Resend all failed messages one by one (and keep order)
+     */
+    fun resendAllFailedMessages()
+
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/send/SendState.kt

@@ -16,6 +16,7 @@
 
 package im.vector.matrix.android.api.session.room.send
 
+
 enum class SendState {
     UNKNOWN,
     // the event has not been sent
@@ -33,12 +34,19 @@ enum class SendState {
     // the event failed to be sent because some unknown devices have been found while encrypting it
     FAILED_UNKNOWN_DEVICES;
 
-    fun isSent(): Boolean {
-        return this == SENT || this == SYNCED
+    internal companion object {
+        val HAS_FAILED_STATES = listOf(UNDELIVERED, FAILED_UNKNOWN_DEVICES)
+        val IS_SENT_STATES = listOf(SENT, SYNCED)
+        val IS_SENDING_STATES = listOf(UNSENT, ENCRYPTING, SENDING)
+        val PENDING_STATES = IS_SENDING_STATES + HAS_FAILED_STATES
     }
 
-    fun hasFailed(): Boolean {
-        return this == UNDELIVERED || this == FAILED_UNKNOWN_DEVICES
-    }
+    fun isSent() = IS_SENT_STATES.contains(this)
+
+    fun hasFailed() = HAS_FAILED_STATES.contains(this)
+
+    fun isSending() = IS_SENDING_STATES.contains(this)
 
 }
+
+

matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/state/StateService.kt

@@ -17,6 +17,7 @@
 package im.vector.matrix.android.api.session.room.state
 
 import im.vector.matrix.android.api.MatrixCallback
+import im.vector.matrix.android.api.session.events.model.Event
 
 interface StateService {
 
@@ -25,4 +26,6 @@ interface StateService {
      */
     fun updateTopic(topic: String, callback: MatrixCallback<Unit>)
 
+    fun getStateEvent(eventType: String): Event?
+
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/timeline/Timeline.kt

@@ -56,6 +56,9 @@ interface Timeline {
      */
     fun paginate(direction: Direction, count: Int)
 
+    fun pendingEventCount() : Int
+
+    fun failedToDeliverEventCount() : Int
 
     interface Listener {
         /**

matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/room/timeline/TimelineEvent.kt

@@ -22,7 +22,6 @@ import im.vector.matrix.android.api.session.events.model.toModel
 import im.vector.matrix.android.api.session.room.model.EventAnnotationsSummary
 import im.vector.matrix.android.api.session.room.model.message.MessageContent
 import im.vector.matrix.android.api.session.room.model.message.isReply
-import im.vector.matrix.android.api.session.room.send.SendState
 import im.vector.matrix.android.api.util.ContentUtils.extractUsefulTextFromReply
 import im.vector.matrix.android.internal.crypto.model.event.EncryptedEventContent
 
@@ -38,7 +37,6 @@ data class TimelineEvent(
         val senderName: String?,
         val isUniqueDisplayName: Boolean,
         val senderAvatar: String?,
-        val sendState: SendState,
         val annotations: EventAnnotationsSummary? = null
 ) {
 
@@ -86,6 +84,12 @@ data class TimelineEvent(
     }
 }
 
+
+/**
+ * Tells if the event has been edited
+ */
+fun TimelineEvent.hasBeenEdited() = annotations?.editSummary != null
+
 /**
  * Get last MessageContent, after a possible edition
  */

matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/user/UserService.kt

@@ -17,7 +17,10 @@
 package im.vector.matrix.android.api.session.user
 
 import androidx.lifecycle.LiveData
+import androidx.paging.PagedList
+import im.vector.matrix.android.api.MatrixCallback
 import im.vector.matrix.android.api.session.user.model.User
+import im.vector.matrix.android.api.util.Cancelable
 
 /**
  * This interface defines methods to get users. It's implemented at the session level.
@@ -31,11 +34,34 @@ interface UserService {
      */
     fun getUser(userId: String): User?
 
+    /**
+     * Search list of users on server directory.
+     * @param search the searched term
+     * @param limit the max number of users to return
+     * @param excludedUserIds the user ids to filter from the search
+     * @param callback the async callback
+     * @return Cancelable
+     */
+    fun searchUsersDirectory(search: String, limit: Int, excludedUserIds: Set<String>, callback: MatrixCallback<List<User>>): Cancelable
+
     /**
      * Observe a live user from a userId
      * @param userId the userId to look for.
      * @return a Livedata of user with userId
      */
-    fun observeUser(userId: String): LiveData<User?>
+    fun liveUser(userId: String): LiveData<User?>
+
+    /**
+     * Observe a live list of users sorted alphabetically
+     * @return a Livedata of users
+     */
+    fun liveUsers(): LiveData<List<User>>
+
+    /**
+     * Observe a live [PagedList] of users sorted alphabetically. You can filter the users.
+     * @param filter the filter. It will look into userId and displayName.
+     * @return a Livedata of users
+     */
+    fun livePagedUsers(filter: String? = null): LiveData<PagedList<User>>
 
 }

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

@@ -68,7 +68,9 @@ 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)
@@ -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/auth/SessionParamsStore.kt

@@ -27,7 +27,7 @@ internal interface SessionParamsStore {
 
     fun getAll(): List<SessionParams>
 
-    fun save(sessionParams: SessionParams): Try<SessionParams>
+    fun save(sessionParams: SessionParams): Try<Unit>
 
     fun delete(userId: String): Try<Unit>
 

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

@@ -62,7 +62,7 @@ internal class RealmSessionParamsStore @Inject constructor(private val mapper: S
         return sessionParams
     }
 
-    override fun save(sessionParams: SessionParams): Try<SessionParams> {
+    override fun save(sessionParams: SessionParams): Try<Unit> {
         return Try {
             val entity = mapper.map(sessionParams)
             if (entity != null) {
@@ -72,7 +72,6 @@ internal class RealmSessionParamsStore @Inject constructor(private val mapper: S
                 }
                 realm.close()
             }
-            sessionParams
         }
     }
 

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

@@ -20,7 +20,6 @@ import com.squareup.moshi.Moshi
 import im.vector.matrix.android.api.auth.data.Credentials
 import im.vector.matrix.android.api.auth.data.HomeServerConnectionConfig
 import im.vector.matrix.android.api.auth.data.SessionParams
-import im.vector.matrix.android.internal.di.MatrixScope
 import javax.inject.Inject
 
 internal class SessionParamsMapper @Inject constructor(moshi: Moshi) {

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

@@ -72,7 +72,6 @@ import im.vector.matrix.android.internal.session.room.membership.RoomMembers
 import im.vector.matrix.android.internal.session.sync.model.SyncResponse
 import im.vector.matrix.android.internal.task.TaskExecutor
 import im.vector.matrix.android.internal.task.configureWith
-import im.vector.matrix.android.internal.task.toConfigurableTask
 import im.vector.matrix.android.internal.util.JsonCanonicalizer
 import im.vector.matrix.android.internal.util.MatrixCoroutineDispatchers
 import im.vector.matrix.android.internal.util.fetchCopied
@@ -167,22 +166,25 @@ internal class CryptoManager @Inject constructor(
 
     override fun setDeviceName(deviceId: String, deviceName: String, callback: MatrixCallback<Unit>) {
         setDeviceNameTask
-                .configureWith(SetDeviceNameTask.Params(deviceId, deviceName))
-                .dispatchTo(callback)
+                .configureWith(SetDeviceNameTask.Params(deviceId, deviceName)) {
+                    this.callback = callback
+                }
                 .executeBy(taskExecutor)
     }
 
     override fun deleteDevice(deviceId: String, callback: MatrixCallback<Unit>) {
         deleteDeviceTask
-                .configureWith(DeleteDeviceTask.Params(deviceId))
-                .dispatchTo(callback)
+                .configureWith(DeleteDeviceTask.Params(deviceId)) {
+                    this.callback = callback
+                }
                 .executeBy(taskExecutor)
     }
 
     override fun deleteDeviceWithUserPassword(deviceId: String, authSession: String?, password: String, callback: MatrixCallback<Unit>) {
         deleteDeviceWithUserPasswordTask
-                .configureWith(DeleteDeviceWithUserPasswordTask.Params(deviceId, authSession, password))
-                .dispatchTo(callback)
+                .configureWith(DeleteDeviceWithUserPasswordTask.Params(deviceId, authSession, password)) {
+                    this.callback = callback
+                }
                 .executeBy(taskExecutor)
     }
 
@@ -196,8 +198,9 @@ internal class CryptoManager @Inject constructor(
 
     override fun getDevicesList(callback: MatrixCallback<DevicesListResponse>) {
         getDevicesTask
-                .toConfigurableTask()
-                .dispatchTo(callback)
+                .configureWith {
+                    this.callback = callback
+                }
                 .executeBy(taskExecutor)
     }
 
@@ -254,16 +257,9 @@ internal class CryptoManager @Inject constructor(
     private suspend fun internalStart(isInitialSync: Boolean) {
         // Open the store
         cryptoStore.open()
+        runCatching {
             uploadDeviceKeys()
-                .flatMap { oneTimeKeysUploader.maybeUploadOneTimeKeys() }
-                .fold(
-                        {
-                            Timber.e("Start failed: $it")
-                            delay(1000)
-                            isStarting.set(false)
-                            internalStart(isInitialSync)
-                        },
-                        {
+            oneTimeKeysUploader.maybeUploadOneTimeKeys()
             outgoingRoomKeyRequestManager.start()
             keysBackup.checkAndStartKeysBackup()
             if (isInitialSync) {
@@ -273,8 +269,16 @@ internal class CryptoManager @Inject constructor(
             } else {
                 incomingRoomKeyRequestManager.processReceivedRoomKeyRequests()
             }
+        }.fold(
+                {
                     isStarting.set(false)
                     isStarted.set(true)
+                },
+                {
+                    Timber.e("Start failed: $it")
+                    delay(1000)
+                    isStarting.set(false)
+                    internalStart(isInitialSync)
                 }
         )
     }
@@ -282,7 +286,7 @@ internal class CryptoManager @Inject constructor(
     /**
      * Close the crypto
      */
-    fun close() {
+    fun close() = runBlocking(coroutineDispatchers.crypto) {
         olmDevice.release()
         cryptoStore.close()
         outgoingRoomKeyRequestManager.stop()
@@ -556,13 +560,16 @@ internal class CryptoManager @Inject constructor(
             if (safeAlgorithm != null) {
                 val t0 = System.currentTimeMillis()
                 Timber.v("## encryptEventContent() starts")
+                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 +591,7 @@ 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)
         }
     }
 
@@ -600,9 +604,11 @@ internal class CryptoManager @Inject constructor(
      */
     override fun decryptEventAsync(event: Event, timeline: String, callback: MatrixCallback<MXEventDecryptionResult>) {
         GlobalScope.launch {
-            val result = withContext(coroutineDispatchers.crypto) {
+            val result = runCatching {
+                withContext(coroutineDispatchers.crypto) {
                     internalDecryptEvent(event, timeline)
                 }
+            }
             result.foldToCallback(callback)
         }
     }
@@ -612,22 +618,22 @@ 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)
             }
         }
     }
@@ -689,11 +695,12 @@ 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 { _ ->
+            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 +768,7 @@ 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 +875,8 @@ 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 +885,8 @@ internal class CryptoManager @Inject constructor(
                                     // trigger an an unknown devices exception
                                     callback.onFailure(Failure.CryptoError(MXCryptoError.UnknownDevice(unknownDevices)))
                                 }
-                            }
+                            },
+                            { callback.onFailure(it) }
                     )
         }
     }
@@ -1035,16 +1041,17 @@ 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)
         }
     }
 
     override fun clearCryptoCache(callback: MatrixCallback<Unit>) {
         clearCryptoDataTask
-                .toConfigurableTask()
-                .dispatchTo(callback)
+                .configureWith {
+                    this.callback = callback
+                }
                 .executeBy(taskExecutor)
     }
 

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>()
@@ -268,15 +266,14 @@ 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 {
+            val result = doKeyDownloadForUsers(downloadUsers)
             Timber.v("## downloadKeys() : doKeyDownloadForUsers succeeds after " + (System.currentTimeMillis() - t0) + " ms")
+            result.also {
                 it.addEntriesFromMap(stored)
-                        it
             }
         }
     }
@@ -286,17 +283,22 @@ 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 ->
+        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)
@@ -334,12 +336,7 @@ internal class DeviceListManager @Inject constructor(private val cryptoStore: IM
                 cryptoStore.storeUserDevices(userId, mutableDevices)
             }
         }
-                    onKeysDownloadSucceed(filteredUsers, response.failures)
-                }
-                .onError {
-                    Timber.e(it, "##doKeyDownloadForUsers(): error")
-                    onKeysDownloadFailed(filteredUsers)
-                }
+        return onKeysDownloadSucceed(filteredUsers, response.failures)
     }
 
     /**
@@ -465,13 +462,14 @@ internal class DeviceListManager @Inject constructor(private val cryptoStore: IM
         }
 
         cryptoStore.saveDeviceTrackingStatuses(deviceTrackingStatuses)
+        runCatching {
             doKeyDownloadForUsers(users)
-                .fold(
-                        {
-                            Timber.e(it, "## refreshOutdatedDeviceLists() : ERROR updating device keys for users $users")
-                        },
+        }.fold(
                 {
                     Timber.v("## refreshOutdatedDeviceLists() : done")
+                },
+                {
+                    Timber.e(it, "## refreshOutdatedDeviceLists() : ERROR updating device keys for users $users")
                 }
         )
     }

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
@@ -80,8 +79,7 @@ internal class MXOlmDevice @Inject constructor(
     //
     // The first level keys are timeline ids.
     // The second level keys are strings of form "<senderKey>|<session_id>|<message_index>"
-    // Values are true.
-    private val inboundGroupSessionMessageIndexes: MutableMap<String, MutableMap<String, Boolean>> = HashMap()
+    private val inboundGroupSessionMessageIndexes: MutableMap<String, MutableSet<String>> = HashMap()
 
     init {
         // Retrieve the account from the store
@@ -506,11 +504,8 @@ internal class MXOlmDevice @Inject constructor(
                                keysClaimed: Map<String, String>,
                                exportFormat: Boolean): Boolean {
         val session = OlmInboundGroupSessionWrapper(sessionKey, exportFormat)
-
-        getInboundGroupSession(sessionId, senderKey, roomId).fold(
-                {
-                    // Nothing to do in case of error
-                },
+        runCatching { getInboundGroupSession(sessionId, senderKey, roomId) }
+                .fold(
                         {
                             // If we already have this session, consider updating it
                             Timber.e("## addInboundGroupSession() : Update for megolm session $senderKey/$sessionId")
@@ -523,6 +518,9 @@ internal class MXOlmDevice @Inject constructor(
                                 session.olmInboundGroupSession?.releaseSession()
                                 return false
                             }
+                        },
+                        {
+                            // Nothing to do in case of error
                         }
                 )
 
@@ -595,12 +593,8 @@ 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 +607,12 @@ internal class MXOlmDevice @Inject constructor(
                                     sessions.add(session)
                                 }
                                 Unit
+                            },
+                            {
+                                // Session does not already exist, add it
+                                sessions.add(session)
                             }
+
                     )
         }
 
@@ -648,9 +647,8 @@ internal class MXOlmDevice @Inject constructor(
                             roomId: String,
                             timeline: String?,
                             sessionId: String,
-                            senderKey: String): Try<OlmDecryptionResult> {
-        return getInboundGroupSession(sessionId, senderKey, roomId)
-                .flatMap { session ->
+                            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) {
@@ -659,23 +657,21 @@ internal class MXOlmDevice @Inject constructor(
                 decryptResult = session.olmInboundGroupSession!!.decryptMessage(body)
             } catch (e: OlmException) {
                 Timber.e(e, "## decryptGroupMessage () : decryptMessage failed")
-                            return@flatMap Try.Failure(MXCryptoError.OlmError(e))
+                throw MXCryptoError.OlmError(e)
             }
 
             if (null != timeline) {
-                            if (!inboundGroupSessionMessageIndexes.containsKey(timeline)) {
-                                inboundGroupSessionMessageIndexes[timeline] = HashMap()
-                            }
+                val timelineSet = inboundGroupSessionMessageIndexes.getOrPut(timeline) { mutableSetOf() }
 
                 val messageIndexKey = senderKey + "|" + sessionId + "|" + decryptResult.mIndex
 
-                            if (inboundGroupSessionMessageIndexes[timeline]?.get(messageIndexKey) != null) {
+                if (timelineSet.contains(messageIndexKey)) {
                     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))
+                    throw MXCryptoError.Base(MXCryptoError.ErrorType.DUPLICATED_MESSAGE_INDEX, reason)
                 }
 
-                            inboundGroupSessionMessageIndexes[timeline]!!.put(messageIndexKey, true)
+                timelineSet.add(messageIndexKey)
             }
 
             store.storeInboundGroupSessions(listOf(session))
@@ -685,23 +681,20 @@ internal class MXOlmDevice @Inject constructor(
                 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))
+                throw
+                MXCryptoError.Base(MXCryptoError.ErrorType.BAD_DECRYPTED_FORMAT, MXCryptoError.BAD_DECRYPTED_FORMAT_TEXT_REASON)
             }
 
-                        return@flatMap Try.just(
-                                OlmDecryptionResult(
+            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")
-                        return@flatMap Try.Failure(MXCryptoError.Base(MXCryptoError.ErrorType.INBOUND_SESSION_MISMATCH_ROOM_ID, reason))
-                    }
+            throw MXCryptoError.Base(MXCryptoError.ErrorType.INBOUND_SESSION_MISMATCH_ROOM_ID, reason)
         }
     }
 
@@ -766,26 +759,26 @@ 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 +791,6 @@ 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/ObjectSigner.kt

@@ -17,7 +17,6 @@
 package im.vector.matrix.android.internal.crypto
 
 import im.vector.matrix.android.api.auth.data.Credentials
-import im.vector.matrix.android.internal.session.SessionScope
 import java.util.*
 import javax.inject.Inject
 

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()
@@ -81,13 +79,12 @@ 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 {
+            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.
@@ -101,22 +98,13 @@ internal class OneTimeKeysUploader @Inject constructor(
             // 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)
+            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
-                }
-    }
 
     /**
      * Upload some the OTKs.
@@ -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)
+        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")
-                        Try.raise(Exception("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 {
+        val response = uploadKeysTask.execute(uploadParams)
         lastPublishedOneTimeKeys = oneTimeKeys
         olmDevice.markKeysAsPublished()
-                    it
-                }
+        return response
     }
 
     companion object {

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

@@ -299,10 +299,12 @@ internal class OutgoingRoomKeyRequestManager @Inject constructor(
             // TODO Change this two hard coded key to something better
             contentMap.setObject(recipient["userId"], recipient["deviceId"], message)
         }
-        sendToDeviceTask.configureWith(SendToDeviceTask.Params(EventType.ROOM_KEY_REQUEST, contentMap, transactionId))
-                .dispatchTo(callback)
-                .executeOn(TaskThread.CALLER)
-                .callbackOn(TaskThread.CALLER)
+        sendToDeviceTask
+                .configureWith(SendToDeviceTask.Params(EventType.ROOM_KEY_REQUEST, contentMap, transactionId)) {
+                    this.callback = callback
+                    this.callbackThread = TaskThread.CALLER
+                    this.executionThread = TaskThread.CALLER
+                }
                 .executeBy(taskExecutor)
     }
 

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
@@ -79,15 +78,13 @@ 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")
+        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 = it.getUserDeviceIds(userId)
+                val deviceIds = oneTimeKeys.getUserDeviceIds(userId)
                 if (null != deviceIds) {
                     for (deviceId in deviceIds) {
                         val olmSessionResult = results.getObject(userId, deviceId)
@@ -95,7 +92,7 @@ internal class EnsureOlmSessionsForDevicesAction @Inject constructor(private val
                             // We already have a result for this device
                             continue
                         }
-                                    val key = it.getObject(userId, deviceId)
+                        val key = oneTimeKeys.getObject(userId, deviceId)
                         if (key?.type == oneTimeKeyAlgorithm) {
                             oneTimeKey = key
                         }
@@ -110,8 +107,7 @@ internal class EnsureOlmSessionsForDevicesAction @Inject constructor(private val
                 }
             }
         }
-                    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

@@ -17,14 +17,11 @@
 package im.vector.matrix.android.internal.crypto.actions
 
 import android.text.TextUtils
-import arrow.core.Try
-import im.vector.matrix.android.api.MatrixCallback
 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.MXOlmSessionResult
 import im.vector.matrix.android.internal.crypto.model.MXUsersDevicesMap
 import im.vector.matrix.android.internal.crypto.store.IMXCryptoStore
-import im.vector.matrix.android.internal.session.SessionScope
 import timber.log.Timber
 import java.util.*
 import javax.inject.Inject
@@ -37,7 +34,7 @@ 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/actions/MegolmSessionDataImporter.kt

@@ -26,7 +26,6 @@ import im.vector.matrix.android.internal.crypto.RoomDecryptorProvider
 import im.vector.matrix.android.internal.crypto.model.ImportRoomKeysResult
 import im.vector.matrix.android.internal.crypto.model.rest.RoomKeyRequestBody
 import im.vector.matrix.android.internal.crypto.store.IMXCryptoStore
-import im.vector.matrix.android.internal.session.SessionScope
 import timber.log.Timber
 import javax.inject.Inject
 

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

@@ -19,7 +19,6 @@ package im.vector.matrix.android.internal.crypto.actions
 import im.vector.matrix.android.api.auth.data.Credentials
 import im.vector.matrix.android.internal.crypto.keysbackup.KeysBackup
 import im.vector.matrix.android.internal.crypto.store.IMXCryptoStore
-import im.vector.matrix.android.internal.session.SessionScope
 import timber.log.Timber
 import javax.inject.Inject
 

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/algorithms/IMXDecrypting.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.Event
 import im.vector.matrix.android.internal.crypto.IncomingRoomKeyRequest
 import im.vector.matrix.android.internal.crypto.MXEventDecryptionResult
@@ -35,7 +34,7 @@ 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,
+        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
                         }
                 )
     }
@@ -311,39 +309,37 @@ 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 usersDeviceMap = ensureOlmSessionsForDevicesAction.handle(devicesByUser)
                             val body = request.requestBody
-                                        val olmSessionResult = it.getObject(userId, deviceId)
+                            val olmSessionResult = usersDeviceMap.getObject(userId, deviceId)
                             if (olmSessionResult?.sessionId == null) {
                                 // no session with this device, probably because there
                                 // were no one-time keys.
-                                            Try.just(Unit)
+                                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)
-
-                                        olmDevice.getInboundGroupSession(body?.sessionId, body?.senderKey, body?.roomId)
+                            runCatching { olmDevice.getInboundGroupSession(body?.sessionId, body?.senderKey, body?.roomId) }
                                     .fold(
                                             {
                                                 // TODO
+                                                payloadJson["content"] = it.exportKeys()
+                                                        ?: ""
                                             },
                                             {
                                                 // TODO
-                                                            payloadJson["content"] = it.exportKeys() ?: ""
                                             }
+
                                     )
 
                             val encodedPayload = messageEncrypter.encryptMessage(payloadJson, listOf(deviceInfo))
@@ -358,4 +354,3 @@ internal class MXMegolmDecryption(private val credentials: Credentials,
     }
 }
 
-}

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

@@ -24,7 +24,6 @@ import im.vector.matrix.android.internal.crypto.actions.EnsureOlmSessionsForDevi
 import im.vector.matrix.android.internal.crypto.actions.MessageEncrypter
 import im.vector.matrix.android.internal.crypto.store.IMXCryptoStore
 import im.vector.matrix.android.internal.crypto.tasks.SendToDeviceTask
-import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.util.MatrixCoroutineDispatchers
 import javax.inject.Inject
 

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>>()
@@ -157,12 +155,10 @@ internal class MXMegolmEncryption(
             }
         }
         Timber.v("## shareKey() ; userId $userIds")
-        return shareUserDevicesKey(session, subMap)
-                .flatMap {
+        shareUserDevicesKey(session, subMap)
         val remainingDevices = devicesByUsers.filterKeys { userIds.contains(it).not() }
         shareKey(session, remainingDevices)
     }
-    }
 
     /**
      * Share the device keys of a an user
@@ -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)
 
@@ -190,17 +186,16 @@ internal class MXMegolmEncryption(
         var t0 = System.currentTimeMillis()
         Timber.v("## shareUserDevicesKey() : starts")
 
-        return ensureOlmSessionsForDevicesAction.handle(devicesByUser)
-                .flatMap {
+        val results = ensureOlmSessionsForDevicesAction.handle(devicesByUser)
         Timber.v("## shareUserDevicesKey() : ensureOlmSessionsForDevices succeeds after "
                 + (System.currentTimeMillis() - t0) + " ms")
         val contentMap = MXUsersDevicesMap<Any>()
         var haveTargets = false
-                    val userIds = it.userIds
+        val userIds = results.userIds
         for (userId in userIds) {
             val devicesToShareWith = devicesByUser[userId]
             for ((deviceID) in devicesToShareWith!!) {
-                            val sessionResult = it.getObject(userId, deviceID)
+                val sessionResult = results.getObject(userId, deviceID)
                 if (sessionResult?.sessionId == null) {
                     // no session with this device, probably because there
                     // were no one-time keys.
@@ -226,7 +221,6 @@ internal class MXMegolmEncryption(
             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")
 
@@ -241,20 +235,15 @@ internal class MXMegolmEncryption(
                     session.sharedWithDevices.setObject(userId, deviceId, chainIndex)
                 }
             }
-                                    Unit
-                                }
         } else {
             Timber.v("## shareUserDevicesKey() : no need to sharekey")
-                        Try.just(Unit)
-                    }
         }
     }
 
     /**
      * process the pending encryptions
      */
-    private fun encryptContent(session: MXOutboundSessionInfo, eventType: String, eventContent: Content): Try<Content> {
-        return Try<Content> {
+    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
@@ -276,8 +265,7 @@ internal class MXMegolmEncryption(
         // m.new_device message if they don't have our session key.
         map["device_id"] = credentials.deviceId!!
         session.useCount++
-            map
-        }
+        return map
     }
 
     /**
@@ -287,24 +275,22 @@ 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 keys = deviceListManager.downloadKeys(userIds, false)
         val encryptToVerifiedDevicesOnly = cryptoStore.getGlobalBlacklistUnverifiedDevices()
                 || cryptoStore.getRoomsListBlacklistUnverifiedDevices().contains(roomId)
 
         val devicesInRoom = MXUsersDevicesMap<MXDeviceInfo>()
         val unknownDevices = MXUsersDevicesMap<MXDeviceInfo>()
 
-                    for (userId in it.userIds) {
-                        val deviceIds = it.getUserDeviceIds(userId) ?: continue
+        for (userId in keys.userIds) {
+            val deviceIds = keys.getUserDeviceIds(userId) ?: continue
             for (deviceId in deviceIds) {
-                            val deviceInfo = it.getObject(userId, deviceId) ?: continue
+                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)
@@ -327,10 +313,9 @@ internal class MXMegolmEncryption(
             }
         }
         if (unknownDevices.isEmpty) {
-                        Try.just(devicesInRoom)
+            return devicesInRoom
         } else {
-                        Try.Failure(MXCryptoError.UnknownDevice(unknownDevices))
-                    }
+            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/MXOlmDecryptionFactory.kt

@@ -18,7 +18,6 @@ package im.vector.matrix.android.internal.crypto.algorithms.olm
 
 import im.vector.matrix.android.api.auth.data.Credentials
 import im.vector.matrix.android.internal.crypto.MXOlmDevice
-import im.vector.matrix.android.internal.session.SessionScope
 import javax.inject.Inject
 
 internal class MXOlmDecryptionFactory @Inject constructor(private val olmDevice: MXOlmDevice,

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
@@ -40,12 +39,11 @@ 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 {
+        ensureSession(userIds)
         val deviceInfos = ArrayList<MXDeviceInfo>()
         for (userId in userIds) {
             val devices = cryptoStore.getUserDevices(userId)?.values ?: emptyList()
@@ -69,8 +67,7 @@ internal class MXOlmEncryption(
         messageMap["content"] = eventContent
 
         messageEncrypter.encryptMessage(messageMap, deviceInfos)
-                    messageMap.toContent()!!
-                }
+        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/algorithms/olm/MXOlmEncryptionFactory.kt

@@ -21,7 +21,6 @@ import im.vector.matrix.android.internal.crypto.MXOlmDevice
 import im.vector.matrix.android.internal.crypto.actions.EnsureOlmSessionsForUsersAction
 import im.vector.matrix.android.internal.crypto.actions.MessageEncrypter
 import im.vector.matrix.android.internal.crypto.store.IMXCryptoStore
-import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.util.MatrixCoroutineDispatchers
 import javax.inject.Inject
 

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

@@ -18,8 +18,6 @@ package im.vector.matrix.android.internal.crypto.api
 
 
 import im.vector.matrix.android.internal.crypto.model.rest.*
-import im.vector.matrix.android.internal.crypto.model.rest.KeysUploadBody
-import im.vector.matrix.android.internal.crypto.model.rest.SendToDeviceBody
 import im.vector.matrix.android.internal.network.NetworkConstants
 import retrofit2.Call
 import retrofit2.http.*

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

@@ -51,7 +51,6 @@ import im.vector.matrix.android.internal.crypto.store.db.model.KeysBackupDataEnt
 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
@@ -204,8 +203,8 @@ internal class KeysBackup @Inject constructor(
         keysBackupStateManager.state = KeysBackupState.Enabling
 
         createKeysBackupVersionTask
-                .configureWith(createKeysBackupVersionBody)
-                .dispatchTo(object : MatrixCallback<KeysVersion> {
+                .configureWith(createKeysBackupVersionBody) {
+                    this.callback = object : MatrixCallback<KeysVersion> {
                         override fun onSuccess(info: KeysVersion) {
                             // Reset backup markers.
                             cryptoStore.resetBackupMarkers()
@@ -228,7 +227,8 @@ internal class KeysBackup @Inject constructor(
                             keysBackupStateManager.state = KeysBackupState.Disabled
                             callback.onFailure(failure)
                         }
-                })
+                    }
+                }
                 .executeBy(taskExecutor)
     }
 
@@ -243,8 +243,9 @@ internal class KeysBackup @Inject constructor(
                     keysBackupStateManager.state = KeysBackupState.Unknown
                 }
 
-                deleteBackupTask.configureWith(DeleteBackupTask.Params(version))
-                        .dispatchTo(object : MatrixCallback<Unit> {
+                deleteBackupTask
+                        .configureWith(DeleteBackupTask.Params(version)) {
+                            this.callback = object : MatrixCallback<Unit> {
                                 private fun eventuallyRestartBackup() {
                                     // Do not stay in KeysBackupState.Unknown but check what is available on the homeserver
                                     if (state == KeysBackupState.Unknown) {
@@ -263,7 +264,8 @@ internal class KeysBackup @Inject constructor(
 
                                     uiHandler.post { callback?.onFailure(failure) }
                                 }
-                        })
+                            }
+                        }
                         .executeBy(taskExecutor)
             }
         }
@@ -355,15 +357,14 @@ 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) {
+                    this.callback = callback
+                    this.executionThread = TaskThread.COMPUTATION
                 }
-                .configureWith(keysBackupVersion)
-                .dispatchTo(callback)
-                .executeOn(TaskThread.COMPUTATION)
                 .executeBy(taskExecutor)
     }
 
@@ -454,7 +455,8 @@ 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
@@ -492,8 +494,8 @@ internal class KeysBackup @Inject constructor(
 
                 // And send it to the homeserver
                 updateKeysBackupVersionTask
-                        .configureWith(UpdateKeysBackupVersionTask.Params(keysBackupVersion.version!!, updateKeysBackupVersionBody))
-                        .dispatchTo(object : MatrixCallback<Unit> {
+                        .configureWith(UpdateKeysBackupVersionTask.Params(keysBackupVersion.version!!, updateKeysBackupVersionBody)) {
+                            this.callback = object : MatrixCallback<Unit> {
                                 override fun onSuccess(data: Unit) {
                                     // Relaunch the state machine on this updated backup version
                                     val newKeysBackupVersion = KeysVersionResult()
@@ -512,7 +514,8 @@ internal class KeysBackup @Inject constructor(
                                 override fun onFailure(failure: Throwable) {
                                     callback.onFailure(failure)
                                 }
-                        })
+                            }
+                        }
                         .executeBy(taskExecutor)
             }
         }
@@ -758,8 +761,8 @@ internal class KeysBackup @Inject constructor(
         if (roomId != null && sessionId != null) {
             // Get key for the room and for the session
             getRoomSessionDataTask
-                    .configureWith(GetRoomSessionDataTask.Params(roomId, sessionId, version))
-                    .dispatchTo(object : MatrixCallback<KeyBackupData> {
+                    .configureWith(GetRoomSessionDataTask.Params(roomId, sessionId, version)) {
+                        this.callback = object : MatrixCallback<KeyBackupData> {
                             override fun onSuccess(data: KeyBackupData) {
                                 // Convert to KeysBackupData
                                 val keysBackupData = KeysBackupData()
@@ -775,13 +778,14 @@ internal class KeysBackup @Inject constructor(
                             override fun onFailure(failure: Throwable) {
                                 callback.onFailure(failure)
                             }
-                    })
+                        }
+                    }
                     .executeBy(taskExecutor)
         } else if (roomId != null) {
             // Get all keys for the room
             getRoomSessionsDataTask
-                    .configureWith(GetRoomSessionsDataTask.Params(roomId, version))
-                    .dispatchTo(object : MatrixCallback<RoomKeysBackupData> {
+                    .configureWith(GetRoomSessionsDataTask.Params(roomId, version)) {
+                        this.callback = object : MatrixCallback<RoomKeysBackupData> {
                             override fun onSuccess(data: RoomKeysBackupData) {
                                 // Convert to KeysBackupData
                                 val keysBackupData = KeysBackupData()
@@ -794,13 +798,15 @@ internal class KeysBackup @Inject constructor(
                             override fun onFailure(failure: Throwable) {
                                 callback.onFailure(failure)
                             }
-                    })
+                        }
+                    }
                     .executeBy(taskExecutor)
         } else {
             // Get all keys
             getSessionsDataTask
-                    .configureWith(GetSessionsDataTask.Params(version))
-                    .dispatchTo(callback)
+                    .configureWith(GetSessionsDataTask.Params(version)) {
+                        this.callback = callback
+                    }
                     .executeBy(taskExecutor)
         }
     }
@@ -855,8 +861,8 @@ internal class KeysBackup @Inject constructor(
     override fun getVersion(version: String,
                             callback: MatrixCallback<KeysVersionResult?>) {
         getKeysBackupVersionTask
-                .configureWith(version)
-                .dispatchTo(object : MatrixCallback<KeysVersionResult> {
+                .configureWith(version) {
+                    this.callback = object : MatrixCallback<KeysVersionResult> {
                         override fun onSuccess(data: KeysVersionResult) {
                             callback.onSuccess(data)
                         }
@@ -871,14 +877,15 @@ internal class KeysBackup @Inject constructor(
                                 callback.onFailure(failure)
                             }
                         }
-                })
+                    }
+                }
                 .executeBy(taskExecutor)
     }
 
     override fun getCurrentVersion(callback: MatrixCallback<KeysVersionResult?>) {
         getKeysBackupLastVersionTask
-                .toConfigurableTask()
-                .dispatchTo(object : MatrixCallback<KeysVersionResult> {
+                .configureWith {
+                    this.callback = object : MatrixCallback<KeysVersionResult> {
                         override fun onSuccess(data: KeysVersionResult) {
                             callback.onSuccess(data)
                         }
@@ -893,7 +900,8 @@ internal class KeysBackup @Inject constructor(
                                 callback.onFailure(failure)
                             }
                         }
-                })
+                    }
+                }
                 .executeBy(taskExecutor)
     }
 
@@ -1236,10 +1244,7 @@ internal class KeysBackup @Inject constructor(
 
                 Timber.v("backupKeys: 4 - Sending request")
 
-                // Make the request
-                storeSessionDataTask
-                        .configureWith(StoreSessionsDataTask.Params(keysBackupVersion!!.version!!, keysBackupData))
-                        .dispatchTo(object : MatrixCallback<BackupKeysResult> {
+                val sendingRequestCallback = object : MatrixCallback<BackupKeysResult> {
                     override fun onSuccess(data: BackupKeysResult) {
                         uiHandler.post {
                             Timber.v("backupKeys: 5a - Request complete")
@@ -1298,7 +1303,13 @@ internal class KeysBackup @Inject constructor(
                             }
                         }
                     }
-                        })
+                }
+
+                // Make the request
+                storeSessionDataTask
+                        .configureWith(StoreSessionsDataTask.Params(keysBackupVersion!!.version!!, keysBackupData)){
+                            this.callback = sendingRequestCallback
+                        }
                         .executeBy(taskExecutor)
             }
         }

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

@@ -142,12 +142,11 @@ private fun deriveKey(password: String,
  * Generate a 32 chars salt
  */
 private fun generateSalt(): String {
-    var salt = ""
-
+    val salt = buildString {
         do {
-        salt += UUID.randomUUID().toString()
-    } while (salt.length < SALT_LENGTH)
-
+            append(UUID.randomUUID().toString())
+        } while (length < SALT_LENGTH)
+    }
 
     return salt.substring(0, SALT_LENGTH)
 }

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/model/MXKey.kt

@@ -63,10 +63,8 @@ data class MXKey(
     fun signatureForUserId(userId: String, signkey: String): String? {
         // sanity checks
         if (userId.isNotBlank() && signkey.isNotBlank()) {
-            if (signatures.containsKey(userId)) {
             return signatures[userId]?.get(signkey)
         }
-        }
 
         return null
     }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/store/db/RealmCryptoStoreModule.kt

@@ -16,8 +16,8 @@
 
 package im.vector.matrix.android.internal.crypto.store.db
 
-import io.realm.annotations.RealmModule
 import im.vector.matrix.android.internal.crypto.store.db.model.*
+import io.realm.annotations.RealmModule
 
 /**
  * Realm module for Crypto store classes

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/store/db/model/CryptoMetadataEntity.kt

@@ -16,10 +16,10 @@
 
 package im.vector.matrix.android.internal.crypto.store.db.model
 
-import io.realm.RealmObject
-import io.realm.annotations.PrimaryKey
 import im.vector.matrix.android.internal.crypto.store.db.deserializeFromRealm
 import im.vector.matrix.android.internal.crypto.store.db.serializeForRealm
+import io.realm.RealmObject
+import io.realm.annotations.PrimaryKey
 import org.matrix.olm.OlmAccount
 
 internal open class CryptoMetadataEntity(

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/store/db/model/DeviceInfoEntity.kt

@@ -16,9 +16,9 @@
 
 package im.vector.matrix.android.internal.crypto.store.db.model
 
+import im.vector.matrix.android.internal.crypto.model.MXDeviceInfo
 import im.vector.matrix.android.internal.crypto.store.db.deserializeFromRealm
 import im.vector.matrix.android.internal.crypto.store.db.serializeForRealm
-import im.vector.matrix.android.internal.crypto.model.MXDeviceInfo
 import io.realm.RealmObject
 import io.realm.RealmResults
 import io.realm.annotations.LinkingObjects

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/store/db/model/OlmInboundGroupSessionEntity.kt

@@ -16,11 +16,11 @@
 
 package im.vector.matrix.android.internal.crypto.store.db.model
 
-import io.realm.RealmObject
-import io.realm.annotations.PrimaryKey
+import im.vector.matrix.android.internal.crypto.model.OlmInboundGroupSessionWrapper
 import im.vector.matrix.android.internal.crypto.store.db.deserializeFromRealm
 import im.vector.matrix.android.internal.crypto.store.db.serializeForRealm
-import im.vector.matrix.android.internal.crypto.model.OlmInboundGroupSessionWrapper
+import io.realm.RealmObject
+import io.realm.annotations.PrimaryKey
 
 internal fun OlmInboundGroupSessionEntity.Companion.createPrimaryKey(sessionId: String?, senderKey: String?) = "$sessionId|$senderKey"
 

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/store/db/model/OlmSessionEntity.kt

@@ -16,10 +16,10 @@
 
 package im.vector.matrix.android.internal.crypto.store.db.model
 
-import io.realm.RealmObject
-import io.realm.annotations.PrimaryKey
 import im.vector.matrix.android.internal.crypto.store.db.deserializeFromRealm
 import im.vector.matrix.android.internal.crypto.store.db.serializeForRealm
+import io.realm.RealmObject
+import io.realm.annotations.PrimaryKey
 import org.matrix.olm.OlmSession
 
 internal fun OlmSessionEntity.Companion.createPrimaryKey(sessionId: String, deviceKey: String) = "$sessionId|$deviceKey"

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/store/db/model/OutgoingRoomKeyRequestEntity.kt

@@ -17,9 +17,9 @@
 package im.vector.matrix.android.internal.crypto.store.db.model
 
 import im.vector.matrix.android.internal.crypto.OutgoingRoomKeyRequest
+import im.vector.matrix.android.internal.crypto.model.rest.RoomKeyRequestBody
 import im.vector.matrix.android.internal.crypto.store.db.deserializeFromRealm
 import im.vector.matrix.android.internal.crypto.store.db.serializeForRealm
-import im.vector.matrix.android.internal.crypto.model.rest.RoomKeyRequestBody
 import io.realm.RealmObject
 import io.realm.annotations.PrimaryKey
 

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/store/db/query/DeviceInfoEntityQueries.kt

@@ -16,11 +16,11 @@
 
 package im.vector.matrix.android.internal.crypto.store.db.query
 
-import io.realm.Realm
-import io.realm.kotlin.where
 import im.vector.matrix.android.internal.crypto.store.db.model.DeviceInfoEntity
 import im.vector.matrix.android.internal.crypto.store.db.model.DeviceInfoEntityFields
 import im.vector.matrix.android.internal.crypto.store.db.model.createPrimaryKey
+import io.realm.Realm
+import io.realm.kotlin.where
 
 /**
  * Get or create a device info

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/store/db/query/UserEntitiesQueries.kt

@@ -16,10 +16,10 @@
 
 package im.vector.matrix.android.internal.crypto.store.db.query
 
-import io.realm.Realm
-import io.realm.kotlin.where
 import im.vector.matrix.android.internal.crypto.store.db.model.UserEntity
 import im.vector.matrix.android.internal.crypto.store.db.model.UserEntityFields
+import io.realm.Realm
+import io.realm.kotlin.where
 
 /**
  * Get or create a user

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
@@ -37,15 +36,13 @@ 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>()
-
         keysClaimResponse.oneTimeKeys?.let { oneTimeKeys ->
             for (userId in oneTimeKeys.keys) {
                 val mapByUserId = oneTimeKeys[userId]
@@ -63,9 +60,6 @@ internal class DefaultClaimOneTimeKeysForUsersDevice @Inject constructor(private
                 }
             }
         }
-
-                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> {
+    override suspend fun execute(params: DeleteDeviceTask.Params) {
+        try {
+            executeRequest<Unit> {
                 apiCall = cryptoApi.deleteDevice(params.deviceId, DeleteDeviceParams())
-        }.recoverWith { throwable ->
+            }
+        } 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

@@ -37,6 +37,7 @@ import im.vector.matrix.android.internal.crypto.model.rest.*
 import im.vector.matrix.android.internal.crypto.store.IMXCryptoStore
 import im.vector.matrix.android.internal.crypto.tasks.SendToDeviceTask
 import im.vector.matrix.android.internal.session.SessionScope
+import im.vector.matrix.android.internal.task.TaskConstraints
 import im.vector.matrix.android.internal.task.TaskExecutor
 import im.vector.matrix.android.internal.task.configureWith
 import im.vector.matrix.android.internal.util.MatrixCoroutineDispatchers
@@ -219,15 +220,18 @@ internal class DefaultSasVerificationService @Inject constructor(private val cre
                                                startReq: KeyVerificationStart,
                                                success: (MXUsersDevicesMap<MXDeviceInfo>) -> Unit,
                                                error: () -> Unit) {
+        runCatching {
             deviceListManager.downloadKeys(listOf(otherUserId), true)
-                .fold(
-                        { error() },
+        }.fold(
                 {
                     if (it.getUserDeviceIds(otherUserId)?.contains(startReq.fromDevice) == true) {
                         success(it)
                     } else {
                         error()
                     }
+                },
+                {
+                    error()
                 }
         )
     }
@@ -412,8 +416,9 @@ internal class DefaultSasVerificationService @Inject constructor(private val cre
         val contentMap = MXUsersDevicesMap<Any>()
         contentMap.setObject(userId, userDevice, cancelMessage)
 
-        sendToDeviceTask.configureWith(SendToDeviceTask.Params(EventType.KEY_VERIFICATION_CANCEL, contentMap, transactionId))
-                .dispatchTo(object : MatrixCallback<Unit> {
+        sendToDeviceTask
+                .configureWith(SendToDeviceTask.Params(EventType.KEY_VERIFICATION_CANCEL, contentMap, transactionId)) {
+                    this.callback = object : MatrixCallback<Unit> {
                         override fun onSuccess(data: Unit) {
                             Timber.v("## SAS verification [$transactionId] canceled for reason ${code.value}")
                         }
@@ -421,7 +426,8 @@ internal class DefaultSasVerificationService @Inject constructor(private val cre
                         override fun onFailure(failure: Throwable) {
                             Timber.e(failure, "## SAS verification [$transactionId] failed to cancel.")
                         }
-                })
+                    }
+                }
                 .executeBy(taskExecutor)
     }
 }

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

@@ -287,8 +287,9 @@ internal abstract class SASVerificationTransaction(
         val contentMap = MXUsersDevicesMap<Any>()
         contentMap.setObject(otherUserId, otherDeviceId, keyToDevice)
 
-        sendToDeviceTask.configureWith(SendToDeviceTask.Params(type, contentMap, transactionId))
-                .dispatchTo(object : MatrixCallback<Unit> {
+        sendToDeviceTask
+                .configureWith(SendToDeviceTask.Params(type, contentMap, transactionId)) {
+                    this.callback = object : MatrixCallback<Unit> {
                         override fun onSuccess(data: Unit) {
                             Timber.v("## SAS verification [$transactionId] toDevice type '$type' success.")
                             if (onDone != null) {
@@ -303,7 +304,8 @@ internal abstract class SASVerificationTransaction(
 
                             cancel(onErrorReason)
                         }
-                })
+                    }
+                }
                 .executeBy(taskExecutor)
     }