]> nmode's Git Repositories - signal-cli/blobdiff - lib/src/main/java/org/asamk/signal/manager/Manager.java
Remove registrationLockV1 code
[signal-cli] / lib / src / main / java / org / asamk / signal / manager / Manager.java
index 87b0f30afa24c24bedd2fe189c9fbd4677d282ca..0fcb42d293d2f494c544908688a3826efdd38991 100644 (file)
@@ -17,6 +17,7 @@
 package org.asamk.signal.manager;
 
 import org.asamk.signal.manager.api.Device;
+import org.asamk.signal.manager.api.TypingAction;
 import org.asamk.signal.manager.config.ServiceConfig;
 import org.asamk.signal.manager.config.ServiceEnvironment;
 import org.asamk.signal.manager.config.ServiceEnvironmentConfig;
@@ -33,6 +34,9 @@ import org.asamk.signal.manager.helper.GroupV2Helper;
 import org.asamk.signal.manager.helper.PinHelper;
 import org.asamk.signal.manager.helper.ProfileHelper;
 import org.asamk.signal.manager.helper.UnidentifiedAccessHelper;
+import org.asamk.signal.manager.jobs.Context;
+import org.asamk.signal.manager.jobs.Job;
+import org.asamk.signal.manager.jobs.RetrieveStickerPackJob;
 import org.asamk.signal.manager.storage.SignalAccount;
 import org.asamk.signal.manager.storage.groups.GroupInfo;
 import org.asamk.signal.manager.storage.groups.GroupInfoV1;
@@ -61,14 +65,12 @@ import org.signal.libsignal.metadata.ProtocolLegacyMessageException;
 import org.signal.libsignal.metadata.ProtocolNoSessionException;
 import org.signal.libsignal.metadata.ProtocolUntrustedIdentityException;
 import org.signal.libsignal.metadata.SelfSendException;
-import org.signal.libsignal.metadata.certificate.CertificateValidator;
 import org.signal.storageservice.protos.groups.GroupChange;
 import org.signal.storageservice.protos.groups.local.DecryptedGroup;
 import org.signal.zkgroup.InvalidInputException;
 import org.signal.zkgroup.VerificationFailedException;
 import org.signal.zkgroup.groups.GroupMasterKey;
 import org.signal.zkgroup.groups.GroupSecretParams;
-import org.signal.zkgroup.profiles.ClientZkProfileOperations;
 import org.signal.zkgroup.profiles.ProfileKey;
 import org.signal.zkgroup.profiles.ProfileKeyCredential;
 import org.slf4j.Logger;
@@ -82,18 +84,12 @@ import org.whispersystems.libsignal.state.PreKeyRecord;
 import org.whispersystems.libsignal.state.SignedPreKeyRecord;
 import org.whispersystems.libsignal.util.Pair;
 import org.whispersystems.libsignal.util.guava.Optional;
-import org.whispersystems.signalservice.api.SignalServiceAccountManager;
-import org.whispersystems.signalservice.api.SignalServiceMessagePipe;
-import org.whispersystems.signalservice.api.SignalServiceMessageReceiver;
-import org.whispersystems.signalservice.api.SignalServiceMessageSender;
+import org.whispersystems.signalservice.api.InvalidMessageStructureException;
 import org.whispersystems.signalservice.api.SignalSessionLock;
-import org.whispersystems.signalservice.api.crypto.SignalServiceCipher;
+import org.whispersystems.signalservice.api.crypto.ContentHint;
 import org.whispersystems.signalservice.api.crypto.UntrustedIdentityException;
-import org.whispersystems.signalservice.api.groupsv2.ClientZkOperations;
 import org.whispersystems.signalservice.api.groupsv2.GroupLinkNotActiveException;
-import org.whispersystems.signalservice.api.groupsv2.GroupsV2Api;
 import org.whispersystems.signalservice.api.groupsv2.GroupsV2AuthorizationString;
-import org.whispersystems.signalservice.api.groupsv2.GroupsV2Operations;
 import org.whispersystems.signalservice.api.messages.SendMessageResult;
 import org.whispersystems.signalservice.api.messages.SignalServiceAttachment;
 import org.whispersystems.signalservice.api.messages.SignalServiceAttachmentPointer;
@@ -105,6 +101,7 @@ import org.whispersystems.signalservice.api.messages.SignalServiceEnvelope;
 import org.whispersystems.signalservice.api.messages.SignalServiceGroup;
 import org.whispersystems.signalservice.api.messages.SignalServiceGroupV2;
 import org.whispersystems.signalservice.api.messages.SignalServiceReceiptMessage;
+import org.whispersystems.signalservice.api.messages.SignalServiceTypingMessage;
 import org.whispersystems.signalservice.api.messages.multidevice.BlockedListMessage;
 import org.whispersystems.signalservice.api.messages.multidevice.ContactsMessage;
 import org.whispersystems.signalservice.api.messages.multidevice.DeviceContact;
@@ -121,14 +118,14 @@ import org.whispersystems.signalservice.api.messages.multidevice.VerifiedMessage
 import org.whispersystems.signalservice.api.profiles.ProfileAndCredential;
 import org.whispersystems.signalservice.api.profiles.SignalServiceProfile;
 import org.whispersystems.signalservice.api.push.SignalServiceAddress;
+import org.whispersystems.signalservice.api.push.exceptions.ConflictException;
 import org.whispersystems.signalservice.api.push.exceptions.MissingConfigurationException;
 import org.whispersystems.signalservice.api.push.exceptions.UnregisteredUserException;
 import org.whispersystems.signalservice.api.util.DeviceNameUtil;
 import org.whispersystems.signalservice.api.util.InvalidNumberException;
 import org.whispersystems.signalservice.api.util.PhoneNumberFormatter;
-import org.whispersystems.signalservice.api.util.SleepTimer;
-import org.whispersystems.signalservice.api.util.UptimeSleepTimer;
 import org.whispersystems.signalservice.api.util.UuidUtil;
+import org.whispersystems.signalservice.api.websocket.WebSocketUnavailableException;
 import org.whispersystems.signalservice.internal.contacts.crypto.Quote;
 import org.whispersystems.signalservice.internal.contacts.crypto.UnauthenticatedQuoteException;
 import org.whispersystems.signalservice.internal.contacts.crypto.UnauthenticatedResponseException;
@@ -175,29 +172,20 @@ public class Manager implements Closeable {
 
     private final static Logger logger = LoggerFactory.getLogger(Manager.class);
 
-    private final CertificateValidator certificateValidator;
-
     private final ServiceEnvironmentConfig serviceEnvironmentConfig;
-    private final String userAgent;
+    private final SignalDependencies dependencies;
 
     private SignalAccount account;
-    private final SignalServiceAccountManager accountManager;
-    private final GroupsV2Api groupsV2Api;
-    private final GroupsV2Operations groupsV2Operations;
-    private final SignalServiceMessageReceiver messageReceiver;
-    private final ClientZkProfileOperations clientZkProfileOperations;
 
     private final ExecutorService executor = Executors.newCachedThreadPool();
 
-    private SignalServiceMessagePipe messagePipe = null;
-    private SignalServiceMessagePipe unidentifiedMessagePipe = null;
-
     private final UnidentifiedAccessHelper unidentifiedAccessHelper;
     private final ProfileHelper profileHelper;
     private final GroupV2Helper groupV2Helper;
     private final PinHelper pinHelper;
     private final AvatarStore avatarStore;
     private final AttachmentStore attachmentStore;
+    private final StickerPackStore stickerPackStore;
     private final SignalSessionLock sessionLock = new SignalSessionLock() {
         private final ReentrantLock LEGACY_LOCK = new ReentrantLock();
 
@@ -216,42 +204,19 @@ public class Manager implements Closeable {
     ) {
         this.account = account;
         this.serviceEnvironmentConfig = serviceEnvironmentConfig;
-        this.certificateValidator = new CertificateValidator(serviceEnvironmentConfig.getUnidentifiedSenderTrustRoot());
-        this.userAgent = userAgent;
-        this.groupsV2Operations = capabilities.isGv2() ? new GroupsV2Operations(ClientZkOperations.create(
-                serviceEnvironmentConfig.getSignalServiceConfiguration())) : null;
-        final SleepTimer timer = new UptimeSleepTimer();
-        this.accountManager = new SignalServiceAccountManager(serviceEnvironmentConfig.getSignalServiceConfiguration(),
-                new DynamicCredentialsProvider(account.getUuid(),
-                        account.getUsername(),
-                        account.getPassword(),
-                        account.getDeviceId()),
-                userAgent,
-                groupsV2Operations,
-                ServiceConfig.AUTOMATIC_NETWORK_RETRY,
-                timer);
-        this.groupsV2Api = accountManager.getGroupsV2Api();
-        final var keyBackupService = accountManager.getKeyBackupService(ServiceConfig.getIasKeyStore(),
-                serviceEnvironmentConfig.getKeyBackupConfig().getEnclaveName(),
-                serviceEnvironmentConfig.getKeyBackupConfig().getServiceId(),
-                serviceEnvironmentConfig.getKeyBackupConfig().getMrenclave(),
-                10);
-
-        this.pinHelper = new PinHelper(keyBackupService);
-        this.clientZkProfileOperations = capabilities.isGv2()
-                ? ClientZkOperations.create(serviceEnvironmentConfig.getSignalServiceConfiguration())
-                .getProfileOperations()
-                : null;
-        this.messageReceiver = new SignalServiceMessageReceiver(serviceEnvironmentConfig.getSignalServiceConfiguration(),
-                account.getUuid(),
+
+        final var credentialsProvider = new DynamicCredentialsProvider(account.getUuid(),
                 account.getUsername(),
                 account.getPassword(),
-                account.getDeviceId(),
+                account.getDeviceId());
+        this.dependencies = new SignalDependencies(account.getSelfAddress(),
+                serviceEnvironmentConfig,
                 userAgent,
-                null,
-                timer,
-                clientZkProfileOperations,
-                ServiceConfig.AUTOMATIC_NETWORK_RETRY);
+                credentialsProvider,
+                account.getSignalProtocolStore(),
+                executor,
+                sessionLock);
+        this.pinHelper = new PinHelper(dependencies.getKeyBackupService());
 
         this.unidentifiedAccessHelper = new UnidentifiedAccessHelper(account::getProfileKey,
                 account.getProfileStore()::getProfileKey,
@@ -259,18 +224,19 @@ public class Manager implements Closeable {
                 this::getSenderCertificate);
         this.profileHelper = new ProfileHelper(account.getProfileStore()::getProfileKey,
                 unidentifiedAccessHelper::getAccessFor,
-                unidentified -> unidentified ? getOrCreateUnidentifiedMessagePipe() : getOrCreateMessagePipe(),
-                () -> messageReceiver,
+                dependencies::getProfileService,
+                dependencies::getMessageReceiver,
                 this::resolveSignalServiceAddress);
         this.groupV2Helper = new GroupV2Helper(this::getRecipientProfileKeyCredential,
                 this::getRecipientProfile,
                 account::getSelfRecipientId,
-                groupsV2Operations,
-                groupsV2Api,
+                dependencies.getGroupsV2Operations(),
+                dependencies.getGroupsV2Api(),
                 this::getGroupAuthForToday,
                 this::resolveSignalServiceAddress);
         this.avatarStore = new AvatarStore(pathConfig.getAvatarsPath());
         this.attachmentStore = new AttachmentStore(pathConfig.getAttachmentsPath());
+        this.stickerPackStore = new StickerPackStore(pathConfig.getStickerPacksPath());
     }
 
     public String getUsername() {
@@ -333,7 +299,7 @@ public class Manager implements Closeable {
         if (account.getLastReceiveTimestamp() == 0) {
             logger.warn("The Signal protocol expects that incoming messages are regularly received.");
         } else {
-            var diffInMilliseconds = new Date().getTime() - account.getLastReceiveTimestamp();
+            var diffInMilliseconds = System.currentTimeMillis() - account.getLastReceiveTimestamp();
             long days = TimeUnit.DAYS.convert(diffInMilliseconds, TimeUnit.MILLISECONDS);
             if (days > 7) {
                 logger.warn(
@@ -341,11 +307,11 @@ public class Manager implements Closeable {
                         days);
             }
         }
-        if (accountManager.getPreKeysCount() < ServiceConfig.PREKEY_MINIMUM_COUNT) {
+        if (dependencies.getAccountManager().getPreKeysCount() < ServiceConfig.PREKEY_MINIMUM_COUNT) {
             refreshPreKeys();
         }
         if (account.getUuid() == null) {
-            account.setUuid(accountManager.getOwnUuid());
+            account.setUuid(dependencies.getAccountManager().getOwnUuid());
         }
         updateAccountAttributes();
     }
@@ -367,17 +333,18 @@ public class Manager implements Closeable {
     }
 
     public void updateAccountAttributes() throws IOException {
-        accountManager.setAccountAttributes(account.getEncryptedDeviceName(),
-                null,
-                account.getLocalRegistrationId(),
-                true,
-                // set legacy pin only if no KBS master key is set
-                account.getPinMasterKey() == null ? account.getRegistrationLockPin() : null,
-                account.getPinMasterKey() == null ? null : account.getPinMasterKey().deriveRegistrationLock(),
-                account.getSelfUnidentifiedAccessKey(),
-                account.isUnrestrictedUnidentifiedAccess(),
-                capabilities,
-                account.isDiscoverableByPhoneNumber());
+        dependencies.getAccountManager()
+                .setAccountAttributes(account.getEncryptedDeviceName(),
+                        null,
+                        account.getLocalRegistrationId(),
+                        true,
+                        // set legacy pin only if no KBS master key is set
+                        account.getPinMasterKey() == null ? account.getRegistrationLockPin() : null,
+                        account.getPinMasterKey() == null ? null : account.getPinMasterKey().deriveRegistrationLock(),
+                        account.getSelfUnidentifiedAccessKey(),
+                        account.isUnrestrictedUnidentifiedAccess(),
+                        capabilities,
+                        account.isDiscoverableByPhoneNumber());
     }
 
     /**
@@ -409,13 +376,14 @@ public class Manager implements Closeable {
         try (final var streamDetails = avatar == null
                 ? avatarStore.retrieveProfileAvatar(getSelfAddress())
                 : avatar.isPresent() ? Utils.createStreamDetailsFromFile(avatar.get()) : null) {
-            accountManager.setVersionedProfile(account.getUuid(),
-                    account.getProfileKey(),
-                    newProfile.getInternalServiceName(),
-                    newProfile.getAbout() == null ? "" : newProfile.getAbout(),
-                    newProfile.getAboutEmoji() == null ? "" : newProfile.getAboutEmoji(),
-                    Optional.absent(),
-                    streamDetails);
+            dependencies.getAccountManager()
+                    .setVersionedProfile(account.getUuid(),
+                            account.getProfileKey(),
+                            newProfile.getInternalServiceName(),
+                            newProfile.getAbout() == null ? "" : newProfile.getAbout(),
+                            newProfile.getAboutEmoji() == null ? "" : newProfile.getAboutEmoji(),
+                            Optional.absent(),
+                            streamDetails);
         }
 
         if (avatar != null) {
@@ -438,19 +406,19 @@ public class Manager implements Closeable {
         // When setting an empty GCM id, the Signal-Server also sets the fetchesMessages property to false.
         // If this is the master device, other users can't send messages to this number anymore.
         // If this is a linked device, other users can still send messages, but this device doesn't receive them anymore.
-        accountManager.setGcmId(Optional.absent());
+        dependencies.getAccountManager().setGcmId(Optional.absent());
 
         account.setRegistered(false);
     }
 
     public void deleteAccount() throws IOException {
-        accountManager.deleteAccount();
+        dependencies.getAccountManager().deleteAccount();
 
         account.setRegistered(false);
     }
 
     public List<Device> getLinkedDevices() throws IOException {
-        var devices = accountManager.getDevices();
+        var devices = dependencies.getAccountManager().getDevices();
         account.setMultiDevice(devices.size() > 1);
         var identityKey = account.getIdentityKeyPair().getPrivateKey();
         return devices.stream().map(d -> {
@@ -467,8 +435,8 @@ public class Manager implements Closeable {
     }
 
     public void removeLinkedDevices(int deviceId) throws IOException {
-        accountManager.removeDevice(deviceId);
-        var devices = accountManager.getDevices();
+        dependencies.getAccountManager().removeDevice(deviceId);
+        var devices = dependencies.getAccountManager().getDevices();
         account.setMultiDevice(devices.size() > 1);
     }
 
@@ -480,13 +448,14 @@ public class Manager implements Closeable {
 
     private void addDevice(String deviceIdentifier, ECPublicKey deviceKey) throws IOException, InvalidKeyException {
         var identityKeyPair = getIdentityKeyPair();
-        var verificationCode = accountManager.getNewDeviceVerificationCode();
-
-        accountManager.addDevice(deviceIdentifier,
-                deviceKey,
-                identityKeyPair,
-                Optional.of(account.getProfileKey().serialize()),
-                verificationCode);
+        var verificationCode = dependencies.getAccountManager().getNewDeviceVerificationCode();
+
+        dependencies.getAccountManager()
+                .addDevice(deviceIdentifier,
+                        deviceKey,
+                        identityKeyPair,
+                        Optional.of(account.getProfileKey().serialize()),
+                        verificationCode);
         account.setMultiDevice(true);
     }
 
@@ -503,9 +472,6 @@ public class Manager implements Closeable {
 
             account.setRegistrationLockPin(pin.get(), masterKey);
         } else {
-            // Remove legacy registration lock
-            accountManager.removeRegistrationLockV1();
-
             // Remove KBS Pin
             pinHelper.removeRegistrationLockPin();
 
@@ -518,7 +484,7 @@ public class Manager implements Closeable {
         final var identityKeyPair = getIdentityKeyPair();
         var signedPreKeyRecord = generateSignedPreKey(identityKeyPair);
 
-        accountManager.setPreKeys(identityKeyPair.getPublicKey(), signedPreKeyRecord, oneTimePreKeys);
+        dependencies.getAccountManager().setPreKeys(identityKeyPair.getPublicKey(), signedPreKeyRecord, oneTimePreKeys);
     }
 
     private List<PreKeyRecord> generatePreKeys() {
@@ -539,39 +505,6 @@ public class Manager implements Closeable {
         return record;
     }
 
-    private SignalServiceMessagePipe getOrCreateMessagePipe() {
-        if (messagePipe == null) {
-            messagePipe = messageReceiver.createMessagePipe();
-        }
-        return messagePipe;
-    }
-
-    private SignalServiceMessagePipe getOrCreateUnidentifiedMessagePipe() {
-        if (unidentifiedMessagePipe == null) {
-            unidentifiedMessagePipe = messageReceiver.createUnidentifiedMessagePipe();
-        }
-        return unidentifiedMessagePipe;
-    }
-
-    private SignalServiceMessageSender createMessageSender() {
-        return new SignalServiceMessageSender(serviceEnvironmentConfig.getSignalServiceConfiguration(),
-                account.getUuid(),
-                account.getUsername(),
-                account.getPassword(),
-                account.getDeviceId(),
-                account.getSignalProtocolStore(),
-                sessionLock,
-                userAgent,
-                account.isMultiDevice(),
-                Optional.fromNullable(messagePipe),
-                Optional.fromNullable(unidentifiedMessagePipe),
-                Optional.absent(),
-                clientZkProfileOperations,
-                executor,
-                ServiceConfig.MAX_ENVELOPE_SIZE,
-                ServiceConfig.AUTOMATIC_NETWORK_RETRY);
-    }
-
     public Profile getRecipientProfile(
             RecipientId recipientId
     ) {
@@ -585,7 +518,7 @@ public class Manager implements Closeable {
     ) {
         var profile = account.getProfileStore().getProfile(recipientId);
 
-        var now = new Date().getTime();
+        var now = System.currentTimeMillis();
         // Profiles are cached for 24h before retrieving them again, unless forced
         if (!force && profile != null && now - profile.getLastUpdateTimestamp() < 24 * 60 * 60 * 1000) {
             return profile;
@@ -609,21 +542,27 @@ public class Manager implements Closeable {
             return null;
         }
 
+        profile = decryptProfileIfKeyKnown(recipientId, encryptedProfile);
+        account.getProfileStore().storeProfile(recipientId, profile);
+
+        return profile;
+    }
+
+    private Profile decryptProfileIfKeyKnown(
+            final RecipientId recipientId, final SignalServiceProfile encryptedProfile
+    ) {
         var profileKey = account.getProfileStore().getProfileKey(recipientId);
         if (profileKey == null) {
-            profile = new Profile(new Date().getTime(),
+            return new Profile(System.currentTimeMillis(),
                     null,
                     null,
                     null,
                     null,
                     ProfileUtils.getUnidentifiedAccessMode(encryptedProfile, null),
                     ProfileUtils.getCapabilities(encryptedProfile));
-        } else {
-            profile = decryptProfileAndDownloadAvatar(recipientId, profileKey, encryptedProfile);
         }
-        account.getProfileStore().storeProfile(recipientId, profile);
 
-        return profile;
+        return decryptProfileAndDownloadAvatar(recipientId, profileKey, encryptedProfile);
     }
 
     private SignalServiceProfile retrieveEncryptedProfile(RecipientId recipientId) {
@@ -778,35 +717,55 @@ public class Manager implements Closeable {
     public Pair<Long, List<SendMessageResult>> sendQuitGroupMessage(
             GroupId groupId, Set<String> groupAdmins
     ) throws GroupNotFoundException, IOException, NotAGroupMemberException, InvalidNumberException, LastGroupAdminException {
-        SignalServiceDataMessage.Builder messageBuilder;
+        var group = getGroupForUpdating(groupId);
+        if (group instanceof GroupInfoV1) {
+            return quitGroupV1((GroupInfoV1) group);
+        }
 
-        final var g = getGroupForUpdating(groupId);
-        if (g instanceof GroupInfoV1) {
-            var groupInfoV1 = (GroupInfoV1) g;
-            var group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.QUIT).withId(groupId.serialize()).build();
-            messageBuilder = SignalServiceDataMessage.newBuilder().asGroupMessage(group);
-            groupInfoV1.removeMember(account.getSelfRecipientId());
-            account.getGroupStore().updateGroup(groupInfoV1);
-        } else {
-            final var groupInfoV2 = (GroupInfoV2) g;
-            final var currentAdmins = g.getAdminMembers();
-            final var newAdmins = getSignalServiceAddresses(groupAdmins);
-            newAdmins.removeAll(currentAdmins);
-            newAdmins.retainAll(g.getMembers());
-            if (currentAdmins.contains(getSelfRecipientId())
-                    && currentAdmins.size() == 1
-                    && g.getMembers().size() > 1
-                    && newAdmins.size() == 0) {
-                // Last admin can't leave the group, unless she's also the last member
-                throw new LastGroupAdminException(g.getGroupId(), g.getTitle());
-            }
-            final var groupGroupChangePair = groupV2Helper.leaveGroup(groupInfoV2, newAdmins);
-            groupInfoV2.setGroup(groupGroupChangePair.first(), this::resolveRecipient);
-            messageBuilder = getGroupUpdateMessageBuilder(groupInfoV2, groupGroupChangePair.second().toByteArray());
-            account.getGroupStore().updateGroup(groupInfoV2);
+        final var newAdmins = getSignalServiceAddresses(groupAdmins);
+        try {
+            return quitGroupV2((GroupInfoV2) group, newAdmins);
+        } catch (ConflictException e) {
+            // Detected conflicting update, refreshing group and trying again
+            group = getGroup(groupId, true);
+            return quitGroupV2((GroupInfoV2) group, newAdmins);
         }
+    }
 
-        return sendMessage(messageBuilder, g.getMembersWithout(account.getSelfRecipientId()));
+    private Pair<Long, List<SendMessageResult>> quitGroupV1(final GroupInfoV1 groupInfoV1) throws IOException {
+        var group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.QUIT)
+                .withId(groupInfoV1.getGroupId().serialize())
+                .build();
+
+        var messageBuilder = SignalServiceDataMessage.newBuilder().asGroupMessage(group);
+        groupInfoV1.removeMember(account.getSelfRecipientId());
+        account.getGroupStore().updateGroup(groupInfoV1);
+        return sendMessage(messageBuilder, groupInfoV1.getMembersWithout(account.getSelfRecipientId()));
+    }
+
+    private Pair<Long, List<SendMessageResult>> quitGroupV2(
+            final GroupInfoV2 groupInfoV2, final Set<RecipientId> newAdmins
+    ) throws LastGroupAdminException, IOException {
+        final var currentAdmins = groupInfoV2.getAdminMembers();
+        newAdmins.removeAll(currentAdmins);
+        newAdmins.retainAll(groupInfoV2.getMembers());
+        if (currentAdmins.contains(getSelfRecipientId())
+                && currentAdmins.size() == 1
+                && groupInfoV2.getMembers().size() > 1
+                && newAdmins.size() == 0) {
+            // Last admin can't leave the group, unless she's also the last member
+            throw new LastGroupAdminException(groupInfoV2.getGroupId(), groupInfoV2.getTitle());
+        }
+        final var groupGroupChangePair = groupV2Helper.leaveGroup(groupInfoV2, newAdmins);
+        groupInfoV2.setGroup(groupGroupChangePair.first(), this::resolveRecipient);
+        var messageBuilder = getGroupUpdateMessageBuilder(groupInfoV2, groupGroupChangePair.second().toByteArray());
+        account.getGroupStore().updateGroup(groupInfoV2);
+        return sendMessage(messageBuilder, groupInfoV2.getMembersWithout(account.getSelfRecipientId()));
+    }
+
+    public void deleteGroup(GroupId groupId) throws IOException {
+        account.getGroupStore().deleteGroup(groupId);
+        avatarStore.deleteGroupAvatar(groupId);
     }
 
     public Pair<GroupId, List<SendMessageResult>> createGroup(
@@ -900,19 +859,37 @@ public class Manager implements Closeable {
         var group = getGroupForUpdating(groupId);
 
         if (group instanceof GroupInfoV2) {
-            return updateGroupV2((GroupInfoV2) group,
-                    name,
-                    description,
-                    members,
-                    removeMembers,
-                    admins,
-                    removeAdmins,
-                    resetGroupLink,
-                    groupLinkState,
-                    addMemberPermission,
-                    editDetailsPermission,
-                    avatarFile,
-                    expirationTimer);
+            try {
+                return updateGroupV2((GroupInfoV2) group,
+                        name,
+                        description,
+                        members,
+                        removeMembers,
+                        admins,
+                        removeAdmins,
+                        resetGroupLink,
+                        groupLinkState,
+                        addMemberPermission,
+                        editDetailsPermission,
+                        avatarFile,
+                        expirationTimer);
+            } catch (ConflictException e) {
+                // Detected conflicting update, refreshing group and trying again
+                group = getGroup(groupId, true);
+                return updateGroupV2((GroupInfoV2) group,
+                        name,
+                        description,
+                        members,
+                        removeMembers,
+                        admins,
+                        removeAdmins,
+                        resetGroupLink,
+                        groupLinkState,
+                        addMemberPermission,
+                        editDetailsPermission,
+                        avatarFile,
+                        expirationTimer);
+            }
         }
 
         final var gv1 = (GroupInfoV1) group;
@@ -1127,14 +1104,15 @@ public class Manager implements Closeable {
     ) throws IOException {
         final var today = currentTimeDays();
         // Returns credentials for the next 7 days
-        final var credentials = groupsV2Api.getCredentials(today);
+        final var credentials = dependencies.getGroupsV2Api().getCredentials(today);
         // TODO cache credentials until they expire
         var authCredentialResponse = credentials.get(today);
         try {
-            return groupsV2Api.getGroupsV2AuthorizationString(account.getUuid(),
-                    today,
-                    groupSecretParams,
-                    authCredentialResponse);
+            return dependencies.getGroupsV2Api()
+                    .getGroupsV2AuthorizationString(account.getUuid(),
+                            today,
+                            groupSecretParams,
+                            authCredentialResponse);
         } catch (VerificationFailedException e) {
             throw new IOException(e);
         }
@@ -1211,9 +1189,10 @@ public class Manager implements Closeable {
                 List.of(messageId),
                 System.currentTimeMillis());
 
-        createMessageSender().sendReceipt(remoteAddress,
-                unidentifiedAccessHelper.getAccessFor(resolveRecipient(remoteAddress)),
-                receiptMessage);
+        dependencies.getMessageSender()
+                .sendReceipt(remoteAddress,
+                        unidentifiedAccessHelper.getAccessFor(resolveRecipient(remoteAddress)),
+                        receiptMessage);
     }
 
     public Pair<Long, List<SendMessageResult>> sendMessage(
@@ -1224,7 +1203,7 @@ public class Manager implements Closeable {
             var attachmentStreams = AttachmentUtils.getSignalServiceAttachments(attachments);
 
             // Upload attachments here, so we only upload once even for multiple recipients
-            var messageSender = createMessageSender();
+            var messageSender = dependencies.getMessageSender();
             var attachmentPointers = new ArrayList<SignalServiceAttachment>(attachmentStreams.size());
             for (var attachment : attachmentStreams) {
                 if (attachment.isStream()) {
@@ -1298,11 +1277,6 @@ public class Manager implements Closeable {
         }
     }
 
-    public String getContactName(String number) throws InvalidNumberException {
-        var contact = account.getContactStore().getContact(canonicalizeAndResolveRecipient(number));
-        return contact == null || contact.getName() == null ? "" : contact.getName();
-    }
-
     public void setContactName(String number, String name) throws InvalidNumberException, NotMasterDeviceException {
         if (!account.isMasterDevice()) {
             throw new NotMasterDeviceException();
@@ -1389,21 +1363,23 @@ public class Manager implements Closeable {
     public String uploadStickerPack(File path) throws IOException, StickerPackInvalidException {
         var manifest = StickerUtils.getSignalServiceStickerManifestUpload(path);
 
-        var messageSender = createMessageSender();
+        var messageSender = dependencies.getMessageSender();
 
         var packKey = KeyUtils.createStickerUploadKey();
-        var packId = messageSender.uploadStickerManifest(manifest, packKey);
+        var packIdString = messageSender.uploadStickerManifest(manifest, packKey);
+        var packId = StickerPackId.deserialize(Hex.fromStringCondensed(packIdString));
 
-        var sticker = new Sticker(StickerPackId.deserialize(Hex.fromStringCondensed(packId)), packKey);
+        var sticker = new Sticker(packId, packKey);
         account.getStickerStore().updateSticker(sticker);
 
         try {
             return new URI("https",
                     "signal.art",
                     "/addstickers/",
-                    "pack_id=" + URLEncoder.encode(packId, StandardCharsets.UTF_8) + "&pack_key=" + URLEncoder.encode(
-                            Hex.toStringCondensed(packKey),
-                            StandardCharsets.UTF_8)).toString();
+                    "pack_id="
+                            + URLEncoder.encode(Hex.toStringCondensed(packId.serialize()), StandardCharsets.UTF_8)
+                            + "&pack_key="
+                            + URLEncoder.encode(Hex.toStringCondensed(packKey), StandardCharsets.UTF_8)).toString();
         } catch (URISyntaxException e) {
             throw new AssertionError(e);
         }
@@ -1481,9 +1457,9 @@ public class Manager implements Closeable {
         byte[] certificate;
         try {
             if (account.isPhoneNumberShared()) {
-                certificate = accountManager.getSenderCertificate();
+                certificate = dependencies.getAccountManager().getSenderCertificate();
             } else {
-                certificate = accountManager.getSenderCertificateForPhoneNumberPrivacy();
+                certificate = dependencies.getAccountManager().getSenderCertificateForPhoneNumberPrivacy();
             }
         } catch (IOException e) {
             logger.warn("Failed to get sender certificate, ignoring: {}", e.getMessage());
@@ -1494,8 +1470,8 @@ public class Manager implements Closeable {
     }
 
     private void sendSyncMessage(SignalServiceSyncMessage message) throws IOException, UntrustedIdentityException {
-        var messageSender = createMessageSender();
-        messageSender.sendMessage(message, unidentifiedAccessHelper.getAccessForSync());
+        var messageSender = dependencies.getMessageSender();
+        messageSender.sendSyncMessage(message, unidentifiedAccessHelper.getAccessForSync());
     }
 
     private Set<RecipientId> getSignalServiceAddresses(Collection<String> numbers) throws InvalidNumberException {
@@ -1549,36 +1525,73 @@ public class Manager implements Closeable {
 
     private Map<String, UUID> getRegisteredUsers(final Set<String> numbers) throws IOException {
         try {
-            return accountManager.getRegisteredUsers(ServiceConfig.getIasKeyStore(),
-                    numbers,
-                    serviceEnvironmentConfig.getCdsMrenclave());
+            return dependencies.getAccountManager()
+                    .getRegisteredUsers(ServiceConfig.getIasKeyStore(),
+                            numbers,
+                            serviceEnvironmentConfig.getCdsMrenclave());
         } catch (Quote.InvalidQuoteFormatException | UnauthenticatedQuoteException | SignatureException | UnauthenticatedResponseException | InvalidKeyException e) {
             throw new IOException(e);
         }
     }
 
+    public void sendTypingMessage(
+            TypingAction action, Set<String> recipients
+    ) throws IOException, UntrustedIdentityException, InvalidNumberException {
+        sendTypingMessageInternal(action, getSignalServiceAddresses(recipients));
+    }
+
+    private void sendTypingMessageInternal(
+            TypingAction action, Set<RecipientId> recipientIds
+    ) throws IOException, UntrustedIdentityException {
+        final var timestamp = System.currentTimeMillis();
+        var message = new SignalServiceTypingMessage(action.toSignalService(), timestamp, Optional.absent());
+        var messageSender = dependencies.getMessageSender();
+        for (var recipientId : recipientIds) {
+            final var address = resolveSignalServiceAddress(recipientId);
+            messageSender.sendTyping(address, unidentifiedAccessHelper.getAccessFor(recipientId), message);
+        }
+    }
+
+    public void sendGroupTypingMessage(
+            TypingAction action, GroupId groupId
+    ) throws IOException, NotAGroupMemberException, GroupNotFoundException {
+        final var timestamp = System.currentTimeMillis();
+        final var g = getGroupForSending(groupId);
+        final var message = new SignalServiceTypingMessage(action.toSignalService(),
+                timestamp,
+                Optional.of(groupId.serialize()));
+        final var messageSender = dependencies.getMessageSender();
+        final var recipientIdList = new ArrayList<>(g.getMembersWithout(account.getSelfRecipientId()));
+        final var addresses = recipientIdList.stream()
+                .map(this::resolveSignalServiceAddress)
+                .collect(Collectors.toList());
+        messageSender.sendTyping(addresses, unidentifiedAccessHelper.getAccessFor(recipientIdList), message, null);
+    }
+
     private Pair<Long, List<SendMessageResult>> sendMessage(
             SignalServiceDataMessage.Builder messageBuilder, Set<RecipientId> recipientIds
     ) throws IOException {
         final var timestamp = System.currentTimeMillis();
         messageBuilder.withTimestamp(timestamp);
-        getOrCreateMessagePipe();
-        getOrCreateUnidentifiedMessagePipe();
+
         SignalServiceDataMessage message = null;
         try {
             message = messageBuilder.build();
             if (message.getGroupContext().isPresent()) {
                 try {
-                    var messageSender = createMessageSender();
+                    var messageSender = dependencies.getMessageSender();
                     final var isRecipientUpdate = false;
                     final var recipientIdList = new ArrayList<>(recipientIds);
                     final var addresses = recipientIdList.stream()
                             .map(this::resolveSignalServiceAddress)
                             .collect(Collectors.toList());
-                    var result = messageSender.sendMessage(addresses,
+                    var result = messageSender.sendDataMessage(addresses,
                             unidentifiedAccessHelper.getAccessFor(recipientIdList),
                             isRecipientUpdate,
-                            message);
+                            ContentHint.DEFAULT,
+                            message,
+                            sendResult -> logger.trace("Partial message send result: {}", sendResult.isSuccess()),
+                            () -> false);
 
                     for (var r : result) {
                         if (r.getIdentityFailure() != null) {
@@ -1622,8 +1635,6 @@ public class Manager implements Closeable {
     ) throws IOException {
         final var timestamp = System.currentTimeMillis();
         messageBuilder.withTimestamp(timestamp);
-        getOrCreateMessagePipe();
-        getOrCreateUnidentifiedMessagePipe();
         final var recipientId = account.getSelfRecipientId();
 
         final var contact = account.getContactStore().getContact(recipientId);
@@ -1636,7 +1647,7 @@ public class Manager implements Closeable {
     }
 
     private SendMessageResult sendSelfMessage(SignalServiceDataMessage message) throws IOException {
-        var messageSender = createMessageSender();
+        var messageSender = dependencies.getMessageSender();
 
         var recipientId = account.getSelfRecipientId();
 
@@ -1651,12 +1662,7 @@ public class Manager implements Closeable {
         var syncMessage = SignalServiceSyncMessage.forSentTranscript(transcript);
 
         try {
-            var startTime = System.currentTimeMillis();
-            messageSender.sendMessage(syncMessage, unidentifiedAccess);
-            return SendMessageResult.success(recipient,
-                    unidentifiedAccess.isPresent(),
-                    false,
-                    System.currentTimeMillis() - startTime);
+            return messageSender.sendSyncMessage(syncMessage, unidentifiedAccess);
         } catch (UntrustedIdentityException e) {
             return SendMessageResult.identityFailure(recipient, e.getIdentityKey());
         }
@@ -1665,16 +1671,20 @@ public class Manager implements Closeable {
     private SendMessageResult sendMessage(
             RecipientId recipientId, SignalServiceDataMessage message
     ) throws IOException {
-        var messageSender = createMessageSender();
+        var messageSender = dependencies.getMessageSender();
 
         final var address = resolveSignalServiceAddress(recipientId);
         try {
             try {
-                return messageSender.sendMessage(address, unidentifiedAccessHelper.getAccessFor(recipientId), message);
+                return messageSender.sendDataMessage(address,
+                        unidentifiedAccessHelper.getAccessFor(recipientId),
+                        ContentHint.DEFAULT,
+                        message);
             } catch (UnregisteredUserException e) {
                 final var newRecipientId = refreshRegisteredUser(recipientId);
-                return messageSender.sendMessage(resolveSignalServiceAddress(newRecipientId),
+                return messageSender.sendDataMessage(resolveSignalServiceAddress(newRecipientId),
                         unidentifiedAccessHelper.getAccessFor(newRecipientId),
+                        ContentHint.DEFAULT,
                         message);
             }
         } catch (UntrustedIdentityException e) {
@@ -1683,7 +1693,7 @@ public class Manager implements Closeable {
     }
 
     private SendMessageResult sendNullMessage(RecipientId recipientId) throws IOException {
-        var messageSender = createMessageSender();
+        var messageSender = dependencies.getMessageSender();
 
         final var address = resolveSignalServiceAddress(recipientId);
         try {
@@ -1699,12 +1709,8 @@ public class Manager implements Closeable {
         }
     }
 
-    private SignalServiceContent decryptMessage(SignalServiceEnvelope envelope) throws InvalidMetadataMessageException, ProtocolInvalidMessageException, ProtocolDuplicateMessageException, ProtocolLegacyMessageException, ProtocolInvalidKeyIdException, InvalidMetadataVersionException, ProtocolInvalidVersionException, ProtocolNoSessionException, ProtocolInvalidKeyException, SelfSendException, UnsupportedDataMessageException, ProtocolUntrustedIdentityException {
-        var cipher = new SignalServiceCipher(account.getSelfAddress(),
-                account.getSignalProtocolStore(),
-                sessionLock,
-                certificateValidator);
-        return cipher.decrypt(envelope);
+    private SignalServiceContent decryptMessage(SignalServiceEnvelope envelope) throws InvalidMetadataMessageException, ProtocolInvalidMessageException, ProtocolDuplicateMessageException, ProtocolLegacyMessageException, ProtocolInvalidKeyIdException, InvalidMetadataVersionException, ProtocolInvalidVersionException, ProtocolNoSessionException, ProtocolInvalidKeyException, SelfSendException, UnsupportedDataMessageException, ProtocolUntrustedIdentityException, InvalidMessageStructureException {
+        return dependencies.getCipher().decrypt(envelope);
     }
 
     private void handleEndSession(RecipientId recipientId) {
@@ -1858,6 +1864,7 @@ public class Manager implements Closeable {
                 sticker = new Sticker(stickerPackId, messageSticker.getPackKey());
                 account.getStickerStore().updateSticker(sticker);
             }
+            enqueueJob(new RetrieveStickerPackJob(stickerPackId, messageSticker.getPackKey()));
         }
         return actions;
     }
@@ -1933,6 +1940,9 @@ public class Manager implements Closeable {
             try {
                 action.execute(this);
             } catch (Throwable e) {
+                if (e instanceof AssertionError && e.getCause() instanceof InterruptedException) {
+                    Thread.currentThread().interrupt();
+                }
                 logger.warn("Message action failed.", e);
             }
         }
@@ -1979,29 +1989,32 @@ public class Manager implements Closeable {
             boolean returnOnTimeout,
             boolean ignoreAttachments,
             ReceiveMessageHandler handler
-    ) throws IOException {
+    ) throws IOException, InterruptedException {
         retryFailedReceivedMessages(handler, ignoreAttachments);
 
         Set<HandleAction> queuedActions = null;
 
-        final var messagePipe = getOrCreateMessagePipe();
+        final var signalWebSocket = dependencies.getSignalWebSocket();
+        signalWebSocket.connect();
 
         var hasCaughtUpWithOldMessages = false;
 
-        while (true) {
+        while (!Thread.interrupted()) {
             SignalServiceEnvelope envelope;
             SignalServiceContent content = null;
             Exception exception = null;
             final CachedMessage[] cachedMessage = {null};
-            account.setLastReceiveTimestamp(new Date().getTime());
+            account.setLastReceiveTimestamp(System.currentTimeMillis());
+            logger.debug("Checking for new message from server");
             try {
-                var result = messagePipe.readOrEmpty(timeout, unit, envelope1 -> {
+                var result = signalWebSocket.readOrEmpty(unit.toMillis(timeout), envelope1 -> {
                     final var recipientId = envelope1.hasSource()
                             ? resolveRecipient(envelope1.getSourceIdentifier())
                             : null;
                     // store message on disk, before acknowledging receipt to the server
                     cachedMessage[0] = account.getMessageCache().cacheMessage(envelope1, recipientId);
                 });
+                logger.debug("New message received from server");
                 if (result.isPresent()) {
                     envelope = result.get();
                 } else {
@@ -2013,6 +2026,9 @@ public class Manager implements Closeable {
                             try {
                                 action.execute(this);
                             } catch (Throwable e) {
+                                if (e instanceof AssertionError && e.getCause() instanceof InterruptedException) {
+                                    Thread.currentThread().interrupt();
+                                }
                                 logger.warn("Message action failed.", e);
                             }
                         }
@@ -2023,6 +2039,16 @@ public class Manager implements Closeable {
                     // Continue to wait another timeout for new messages
                     continue;
                 }
+            } catch (AssertionError e) {
+                if (e.getCause() instanceof InterruptedException) {
+                    throw (InterruptedException) e.getCause();
+                } else {
+                    throw e;
+                }
+            } catch (WebSocketUnavailableException e) {
+                logger.debug("Pipe unexpectedly unavailable, connecting");
+                signalWebSocket.connect();
+                continue;
             } catch (TimeoutException e) {
                 if (returnOnTimeout) return;
                 continue;
@@ -2056,6 +2082,9 @@ public class Manager implements Closeable {
                         try {
                             action.execute(this);
                         } catch (Throwable e) {
+                            if (e instanceof AssertionError && e.getCause() instanceof InterruptedException) {
+                                Thread.currentThread().interrupt();
+                            }
                             logger.warn("Message action failed.", e);
                         }
                     }
@@ -2221,7 +2250,16 @@ public class Manager implements Closeable {
                         try (var attachmentAsStream = retrieveAttachmentAsStream(groupsMessage.asPointer(), tmpFile)) {
                             var s = new DeviceGroupsInputStream(attachmentAsStream);
                             DeviceGroup g;
-                            while ((g = s.read()) != null) {
+                            while (true) {
+                                try {
+                                    g = s.read();
+                                } catch (IOException e) {
+                                    logger.warn("Sync groups contained invalid group, ignoring: {}", e.getMessage());
+                                    continue;
+                                }
+                                if (g == null) {
+                                    break;
+                                }
                                 var syncGroup = account.getGroupStore().getOrCreateGroupV1(GroupId.v1(g.getId()));
                                 if (syncGroup != null) {
                                     if (g.getName().isPresent()) {
@@ -2292,7 +2330,17 @@ public class Manager implements Closeable {
                                 .asPointer(), tmpFile)) {
                             var s = new DeviceContactsInputStream(attachmentAsStream);
                             DeviceContact c;
-                            while ((c = s.read()) != null) {
+                            while (true) {
+                                try {
+                                    c = s.read();
+                                } catch (IOException e) {
+                                    logger.warn("Sync contacts contained invalid contact, ignoring: {}",
+                                            e.getMessage());
+                                    continue;
+                                }
+                                if (c == null) {
+                                    break;
+                                }
                                 if (c.getAddress().matches(account.getSelfAddress()) && c.getProfileKey().isPresent()) {
                                     account.setProfileKey(c.getProfileKey().get());
                                 }
@@ -2359,16 +2407,23 @@ public class Manager implements Closeable {
                             continue;
                         }
                         final var stickerPackId = StickerPackId.deserialize(m.getPackId().get());
+                        final var installed = !m.getType().isPresent()
+                                || m.getType().get() == StickerPackOperationMessage.Type.INSTALL;
+
                         var sticker = account.getStickerStore().getSticker(stickerPackId);
-                        if (sticker == null) {
-                            if (!m.getPackKey().isPresent()) {
-                                continue;
+                        if (m.getPackKey().isPresent()) {
+                            if (sticker == null) {
+                                sticker = new Sticker(stickerPackId, m.getPackKey().get());
+                            }
+                            if (installed) {
+                                enqueueJob(new RetrieveStickerPackJob(stickerPackId, m.getPackKey().get()));
                             }
-                            sticker = new Sticker(stickerPackId, m.getPackKey().get());
                         }
-                        sticker.setInstalled(!m.getType().isPresent()
-                                || m.getType().get() == StickerPackOperationMessage.Type.INSTALL);
-                        account.getStickerStore().updateSticker(sticker);
+
+                        if (sticker != null) {
+                            sticker.setInstalled(installed);
+                            account.getStickerStore().updateSticker(sticker);
+                        }
                     }
                 }
                 if (syncMessage.getFetchType().isPresent()) {
@@ -2426,6 +2481,9 @@ public class Manager implements Closeable {
             avatarStore.storeProfileAvatar(address,
                     outputStream -> retrieveProfileAvatar(avatarPath, profileKey, outputStream));
         } catch (Throwable e) {
+            if (e instanceof AssertionError && e.getCause() instanceof InterruptedException) {
+                Thread.currentThread().interrupt();
+            }
             logger.warn("Failed to download profile avatar, ignoring: {}", e.getMessage());
         }
     }
@@ -2461,12 +2519,11 @@ public class Manager implements Closeable {
     private void retrieveGroupV2Avatar(
             GroupSecretParams groupSecretParams, String cdnKey, OutputStream outputStream
     ) throws IOException {
-        var groupOperations = groupsV2Operations.forGroup(groupSecretParams);
+        var groupOperations = dependencies.getGroupsV2Operations().forGroup(groupSecretParams);
 
         var tmpFile = IOUtils.createTempFile();
-        try (InputStream input = messageReceiver.retrieveGroupsV2ProfileAvatar(cdnKey,
-                tmpFile,
-                ServiceConfig.AVATAR_DOWNLOAD_FAILSAFE_MAX_SIZE)) {
+        try (InputStream input = dependencies.getMessageReceiver()
+                .retrieveGroupsV2ProfileAvatar(cdnKey, tmpFile, ServiceConfig.AVATAR_DOWNLOAD_FAILSAFE_MAX_SIZE)) {
             var encryptedData = IOUtils.readFully(input);
 
             var decryptedData = groupOperations.decryptAvatar(encryptedData);
@@ -2486,10 +2543,11 @@ public class Manager implements Closeable {
             String avatarPath, ProfileKey profileKey, OutputStream outputStream
     ) throws IOException {
         var tmpFile = IOUtils.createTempFile();
-        try (var input = messageReceiver.retrieveProfileAvatar(avatarPath,
-                tmpFile,
-                profileKey,
-                ServiceConfig.AVATAR_DOWNLOAD_FAILSAFE_MAX_SIZE)) {
+        try (var input = dependencies.getMessageReceiver()
+                .retrieveProfileAvatar(avatarPath,
+                        tmpFile,
+                        profileKey,
+                        ServiceConfig.AVATAR_DOWNLOAD_FAILSAFE_MAX_SIZE)) {
             // Use larger buffer size to prevent AssertionError: Need: 12272 but only have: 8192 ...
             IOUtils.copyStream(input, outputStream, (int) ServiceConfig.AVATAR_DOWNLOAD_FAILSAFE_MAX_SIZE);
         } finally {
@@ -2537,7 +2595,8 @@ public class Manager implements Closeable {
     private InputStream retrieveAttachmentAsStream(
             SignalServiceAttachmentPointer pointer, File tmpFile
     ) throws IOException, InvalidMessageException, MissingConfigurationException {
-        return messageReceiver.retrieveAttachment(pointer, tmpFile, ServiceConfig.MAX_ATTACHMENT_SIZE);
+        return dependencies.getMessageReceiver()
+                .retrieveAttachment(pointer, tmpFile, ServiceConfig.MAX_ATTACHMENT_SIZE);
     }
 
     void sendGroups() throws IOException, UntrustedIdentityException {
@@ -2703,8 +2762,12 @@ public class Manager implements Closeable {
     }
 
     public GroupInfo getGroup(GroupId groupId) {
+        return getGroup(groupId, false);
+    }
+
+    public GroupInfo getGroup(GroupId groupId, boolean forceUpdate) {
         final var group = account.getGroupStore().getGroup(groupId);
-        if (group instanceof GroupInfoV2 && ((GroupInfoV2) group).getGroup() == null) {
+        if (group instanceof GroupInfoV2 && (forceUpdate || ((GroupInfoV2) group).getGroup() == null)) {
             final var groupSecretParams = GroupSecretParams.deriveFromMasterKey(((GroupInfoV2) group).getMasterKey());
             ((GroupInfoV2) group).setGroup(groupV2Helper.getDecryptedGroup(groupSecretParams), this::resolveRecipient);
             account.getGroupStore().updateGroup(group);
@@ -2833,6 +2896,14 @@ public class Manager implements Closeable {
         return account.getRecipientStore().resolveRecipientTrusted(address);
     }
 
+    private void enqueueJob(Job job) {
+        var context = new Context(account,
+                dependencies.getAccountManager(),
+                dependencies.getMessageReceiver(),
+                stickerPackStore);
+        job.run(context);
+    }
+
     @Override
     public void close() throws IOException {
         close(true);
@@ -2841,15 +2912,7 @@ public class Manager implements Closeable {
     void close(boolean closeAccount) throws IOException {
         executor.shutdown();
 
-        if (messagePipe != null) {
-            messagePipe.shutdown();
-            messagePipe = null;
-        }
-
-        if (unidentifiedMessagePipe != null) {
-            unidentifiedMessagePipe.shutdown();
-            unidentifiedMessagePipe = null;
-        }
+        dependencies.getSignalWebSocket().disconnect();
 
         if (closeAccount && account != null) {
             account.close();