]> nmode's Git Repositories - signal-cli/blobdiff - src/main/java/org/asamk/signal/manager/Manager.java
Cleanup utils
[signal-cli] / src / main / java / org / asamk / signal / manager / Manager.java
index 26f5abbc20ee29d0873614e8fc42ce6a6015b8a1..5ed8fc4e506d852fccafb4144174e69d8025402a 100644 (file)
@@ -18,20 +18,30 @@ package org.asamk.signal.manager;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
 
+import org.asamk.signal.manager.groups.GroupId;
+import org.asamk.signal.manager.groups.GroupIdV1;
+import org.asamk.signal.manager.groups.GroupIdV2;
+import org.asamk.signal.manager.groups.GroupInviteLinkUrl;
+import org.asamk.signal.manager.groups.GroupNotFoundException;
+import org.asamk.signal.manager.groups.GroupUtils;
+import org.asamk.signal.manager.groups.NotAGroupMemberException;
 import org.asamk.signal.manager.helper.GroupHelper;
 import org.asamk.signal.manager.helper.ProfileHelper;
 import org.asamk.signal.manager.helper.UnidentifiedAccessHelper;
-import org.asamk.signal.storage.SignalAccount;
-import org.asamk.signal.storage.contacts.ContactInfo;
-import org.asamk.signal.storage.groups.GroupInfo;
-import org.asamk.signal.storage.groups.GroupInfoV1;
-import org.asamk.signal.storage.groups.GroupInfoV2;
-import org.asamk.signal.storage.profiles.SignalProfile;
-import org.asamk.signal.storage.profiles.SignalProfileEntry;
-import org.asamk.signal.storage.protocol.JsonIdentityKeyStore;
-import org.asamk.signal.storage.stickers.Sticker;
-import org.asamk.signal.util.IOUtils;
-import org.asamk.signal.util.Util;
+import org.asamk.signal.manager.storage.SignalAccount;
+import org.asamk.signal.manager.storage.contacts.ContactInfo;
+import org.asamk.signal.manager.storage.groups.GroupInfo;
+import org.asamk.signal.manager.storage.groups.GroupInfoV1;
+import org.asamk.signal.manager.storage.groups.GroupInfoV2;
+import org.asamk.signal.manager.storage.profiles.SignalProfile;
+import org.asamk.signal.manager.storage.profiles.SignalProfileEntry;
+import org.asamk.signal.manager.storage.protocol.IdentityInfo;
+import org.asamk.signal.manager.storage.stickers.Sticker;
+import org.asamk.signal.manager.util.AttachmentUtils;
+import org.asamk.signal.manager.util.IOUtils;
+import org.asamk.signal.manager.util.KeyUtils;
+import org.asamk.signal.manager.util.MessageCacheUtils;
+import org.asamk.signal.manager.util.Utils;
 import org.signal.libsignal.metadata.InvalidMetadataMessageException;
 import org.signal.libsignal.metadata.InvalidMetadataVersionException;
 import org.signal.libsignal.metadata.ProtocolDuplicateMessageException;
@@ -43,8 +53,10 @@ 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.storageservice.protos.groups.local.DecryptedGroupJoinInfo;
 import org.signal.storageservice.protos.groups.local.DecryptedMember;
 import org.signal.zkgroup.InvalidInputException;
 import org.signal.zkgroup.VerificationFailedException;
@@ -54,6 +66,8 @@ 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;
+import org.slf4j.LoggerFactory;
 import org.whispersystems.libsignal.IdentityKey;
 import org.whispersystems.libsignal.IdentityKeyPair;
 import org.whispersystems.libsignal.InvalidKeyException;
@@ -78,10 +92,10 @@ import org.whispersystems.signalservice.api.crypto.SignalServiceCipher;
 import org.whispersystems.signalservice.api.crypto.UnidentifiedAccessPair;
 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.groupsv2.InvalidGroupStateException;
 import org.whispersystems.signalservice.api.messages.SendMessageResult;
 import org.whispersystems.signalservice.api.messages.SignalServiceAttachment;
 import org.whispersystems.signalservice.api.messages.SignalServiceAttachmentPointer;
@@ -115,6 +129,7 @@ import org.whispersystems.signalservice.api.push.ContactTokenDetails;
 import org.whispersystems.signalservice.api.push.SignalServiceAddress;
 import org.whispersystems.signalservice.api.push.exceptions.MissingConfigurationException;
 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.StreamDetails;
 import org.whispersystems.signalservice.api.util.UptimeSleepTimer;
@@ -172,7 +187,10 @@ import static org.asamk.signal.manager.ServiceConfig.getIasKeyStore;
 
 public class Manager implements Closeable {
 
+    final static Logger logger = LoggerFactory.getLogger(Manager.class);
+
     private final SleepTimer timer = new UptimeSleepTimer();
+    private final CertificateValidator certificateValidator = new CertificateValidator(ServiceConfig.getUnidentifiedSenderTrustRoot());
 
     private final SignalServiceConfiguration serviceConfiguration;
     private final String userAgent;
@@ -254,26 +272,26 @@ public class Manager implements Closeable {
         return account.getDeviceId();
     }
 
-    private String getMessageCachePath() {
-        return pathConfig.getDataPath() + "/" + account.getUsername() + ".d/msg-cache";
+    private File getMessageCachePath() {
+        return SignalAccount.getMessageCachePath(pathConfig.getDataPath(), account.getUsername());
     }
 
-    private String getMessageCachePath(String sender) {
+    private File getMessageCachePath(String sender) {
         if (sender == null || sender.isEmpty()) {
             return getMessageCachePath();
         }
 
-        return getMessageCachePath() + "/" + sender.replace("/", "_");
+        return new File(getMessageCachePath(), sender.replace("/", "_"));
     }
 
     private File getMessageCacheFile(String sender, long now, long timestamp) throws IOException {
-        String cachePath = getMessageCachePath(sender);
+        File cachePath = getMessageCachePath(sender);
         IOUtils.createPrivateDirectories(cachePath);
-        return new File(cachePath + "/" + now + "_" + timestamp);
+        return new File(cachePath, now + "_" + timestamp);
     }
 
     public static Manager init(
-            String username, String settingsPath, SignalServiceConfiguration serviceConfiguration, String userAgent
+            String username, File settingsPath, SignalServiceConfiguration serviceConfiguration, String userAgent
     ) throws IOException {
         PathConfig pathConfig = PathConfig.createDefault(settingsPath);
 
@@ -322,6 +340,8 @@ public class Manager implements Closeable {
             contact.profileKey = null;
             account.getProfileStore().storeProfileKey(contact.getAddress(), profileKey);
         }
+        // Ensure our profile key is stored in profile store
+        account.getProfileStore().storeProfileKey(getSelfAddress(), account.getProfileKey());
     }
 
     public void checkAccountState() throws IOException {
@@ -405,7 +425,7 @@ public class Manager implements Closeable {
     }
 
     public void addDeviceLink(URI linkUri) throws IOException, InvalidKeyException {
-        Utils.DeviceLinkInfo info = Utils.parseDeviceLinkUri(linkUri);
+        DeviceLinkInfo info = DeviceLinkInfo.parseDeviceLinkUri(linkUri);
 
         addDevice(info.deviceIdentifier, info.deviceKey);
     }
@@ -587,7 +607,7 @@ public class Manager implements Closeable {
             try {
                 profile = retrieveRecipientProfile(address, profileKey);
             } catch (IOException e) {
-                System.err.println("Failed to retrieve profile, ignoring: " + e.getMessage());
+                logger.warn("Failed to retrieve profile, ignoring: {}", e.getMessage());
                 profileEntry.setRequestPending(false);
                 return null;
             }
@@ -610,7 +630,7 @@ public class Manager implements Closeable {
                 profileAndCredential = profileHelper.retrieveProfileSync(address,
                         SignalServiceProfile.RequestType.PROFILE_AND_CREDENTIAL);
             } catch (IOException e) {
-                System.err.println("Failed to retrieve profile key credential, ignoring: " + e.getMessage());
+                logger.warn("Failed to retrieve profile key credential, ignoring: {}", e.getMessage());
                 return null;
             }
 
@@ -643,7 +663,7 @@ public class Manager implements Closeable {
                     ? null
                     : retrieveProfileAvatar(address, encryptedProfile.getAvatar(), profileKey);
         } catch (Throwable e) {
-            System.err.println("Failed to retrieve profile avatar, ignoring: " + e.getMessage());
+            logger.warn("Failed to retrieve profile avatar, ignoring: {}", e.getMessage());
         }
 
         ProfileCipher profileCipher = new ProfileCipher(profileKey);
@@ -676,13 +696,13 @@ public class Manager implements Closeable {
         }
     }
 
-    private Optional<SignalServiceAttachmentStream> createGroupAvatarAttachment(byte[] groupId) throws IOException {
+    private Optional<SignalServiceAttachmentStream> createGroupAvatarAttachment(GroupId groupId) throws IOException {
         File file = getGroupAvatarFile(groupId);
         if (!file.exists()) {
             return Optional.absent();
         }
 
-        return Optional.of(Utils.createAttachment(file));
+        return Optional.of(AttachmentUtils.createAttachment(file));
     }
 
     private Optional<SignalServiceAttachmentStream> createContactAvatarAttachment(String number) throws IOException {
@@ -691,10 +711,10 @@ public class Manager implements Closeable {
             return Optional.absent();
         }
 
-        return Optional.of(Utils.createAttachment(file));
+        return Optional.of(AttachmentUtils.createAttachment(file));
     }
 
-    private GroupInfo getGroupForSending(byte[] groupId) throws GroupNotFoundException, NotAGroupMemberException {
+    private GroupInfo getGroupForSending(GroupId groupId) throws GroupNotFoundException, NotAGroupMemberException {
         GroupInfo g = account.getGroupStore().getGroup(groupId);
         if (g == null) {
             throw new GroupNotFoundException(groupId);
@@ -705,12 +725,23 @@ public class Manager implements Closeable {
         return g;
     }
 
+    private GroupInfo getGroupForUpdating(GroupId groupId) throws GroupNotFoundException, NotAGroupMemberException {
+        GroupInfo g = account.getGroupStore().getGroup(groupId);
+        if (g == null) {
+            throw new GroupNotFoundException(groupId);
+        }
+        if (!g.isMember(account.getSelfAddress()) && !g.isPendingMember(account.getSelfAddress())) {
+            throw new NotAGroupMemberException(groupId, g.getTitle());
+        }
+        return g;
+    }
+
     public List<GroupInfo> getGroups() {
         return account.getGroupStore().getGroups();
     }
 
     public Pair<Long, List<SendMessageResult>> sendGroupMessage(
-            SignalServiceDataMessage.Builder messageBuilder, byte[] groupId
+            SignalServiceDataMessage.Builder messageBuilder, GroupId groupId
     ) throws IOException, GroupNotFoundException, NotAGroupMemberException {
         final GroupInfo g = getGroupForSending(groupId);
 
@@ -721,19 +752,19 @@ public class Manager implements Closeable {
     }
 
     public Pair<Long, List<SendMessageResult>> sendGroupMessage(
-            String messageText, List<String> attachments, byte[] groupId
+            String messageText, List<String> attachments, GroupId groupId
     ) throws IOException, GroupNotFoundException, AttachmentInvalidException, NotAGroupMemberException {
         final SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder()
                 .withBody(messageText);
         if (attachments != null) {
-            messageBuilder.withAttachments(Utils.getSignalServiceAttachments(attachments));
+            messageBuilder.withAttachments(AttachmentUtils.getSignalServiceAttachments(attachments));
         }
 
         return sendGroupMessage(messageBuilder, groupId);
     }
 
     public Pair<Long, List<SendMessageResult>> sendGroupMessageReaction(
-            String emoji, boolean remove, String targetAuthor, long targetSentTimestamp, byte[] groupId
+            String emoji, boolean remove, String targetAuthor, long targetSentTimestamp, GroupId groupId
     ) throws IOException, InvalidNumberException, NotAGroupMemberException, GroupNotFoundException {
         SignalServiceDataMessage.Reaction reaction = new SignalServiceDataMessage.Reaction(emoji,
                 remove,
@@ -745,15 +776,15 @@ public class Manager implements Closeable {
         return sendGroupMessage(messageBuilder, groupId);
     }
 
-    public Pair<Long, List<SendMessageResult>> sendQuitGroupMessage(byte[] groupId) throws GroupNotFoundException, IOException, NotAGroupMemberException {
+    public Pair<Long, List<SendMessageResult>> sendQuitGroupMessage(GroupId groupId) throws GroupNotFoundException, IOException, NotAGroupMemberException {
 
         SignalServiceDataMessage.Builder messageBuilder;
 
-        final GroupInfo g = getGroupForSending(groupId);
+        final GroupInfo g = getGroupForUpdating(groupId);
         if (g instanceof GroupInfoV1) {
             GroupInfoV1 groupInfoV1 = (GroupInfoV1) g;
             SignalServiceGroup group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.QUIT)
-                    .withId(groupId)
+                    .withId(groupId.serialize())
                     .build();
             messageBuilder = SignalServiceDataMessage.newBuilder().asGroupMessage(group);
             groupInfoV1.removeMember(account.getSelfAddress());
@@ -769,8 +800,8 @@ public class Manager implements Closeable {
         return sendMessage(messageBuilder, g.getMembersWithout(account.getSelfAddress()));
     }
 
-    private Pair<byte[], List<SendMessageResult>> sendUpdateGroupMessage(
-            byte[] groupId, String name, Collection<SignalServiceAddress> members, String avatarFile
+    private Pair<GroupId, List<SendMessageResult>> sendUpdateGroupMessage(
+            GroupId groupId, String name, Collection<SignalServiceAddress> members, String avatarFile
     ) throws IOException, GroupNotFoundException, AttachmentInvalidException, NotAGroupMemberException {
         GroupInfo g;
         SignalServiceDataMessage.Builder messageBuilder;
@@ -778,7 +809,7 @@ public class Manager implements Closeable {
             // Create new group
             GroupInfoV2 gv2 = groupHelper.createGroupV2(name, members, avatarFile);
             if (gv2 == null) {
-                GroupInfoV1 gv1 = new GroupInfoV1(KeyUtils.createGroupId());
+                GroupInfoV1 gv1 = new GroupInfoV1(GroupIdV1.createRandom());
                 gv1.addMembers(Collections.singleton(account.getSelfAddress()));
                 updateGroupV1(gv1, name, members, avatarFile);
                 messageBuilder = getGroupUpdateMessageBuilder(gv1);
@@ -788,31 +819,42 @@ public class Manager implements Closeable {
                 g = gv2;
             }
         } else {
-            GroupInfo group = getGroupForSending(groupId);
+            GroupInfo group = getGroupForUpdating(groupId);
             if (group instanceof GroupInfoV2) {
-                Pair<DecryptedGroup, GroupChange> groupGroupChangePair = null;
+                final GroupInfoV2 groupInfoV2 = (GroupInfoV2) group;
+
+                Pair<Long, List<SendMessageResult>> result = null;
+                if (groupInfoV2.isPendingMember(getSelfAddress())) {
+                    Pair<DecryptedGroup, GroupChange> groupGroupChangePair = groupHelper.acceptInvite(groupInfoV2);
+                    result = sendUpdateGroupMessage(groupInfoV2,
+                            groupGroupChangePair.first(),
+                            groupGroupChangePair.second());
+                }
+
                 if (members != null) {
                     final Set<SignalServiceAddress> newMembers = new HashSet<>(members);
-                    newMembers.removeAll(group.getMembers());
+                    newMembers.removeAll(group.getMembers()
+                            .stream()
+                            .map(this::resolveSignalServiceAddress)
+                            .collect(Collectors.toSet()));
                     if (newMembers.size() > 0) {
-                        groupGroupChangePair = groupHelper.updateGroupV2((GroupInfoV2) group, newMembers);
+                        Pair<DecryptedGroup, GroupChange> groupGroupChangePair = groupHelper.updateGroupV2(groupInfoV2,
+                                newMembers);
+                        result = sendUpdateGroupMessage(groupInfoV2,
+                                groupGroupChangePair.first(),
+                                groupGroupChangePair.second());
                     }
                 }
-                if (groupGroupChangePair == null || name != null || avatarFile != null) {
-                    if (groupGroupChangePair != null) {
-                        ((GroupInfoV2) group).setGroup(groupGroupChangePair.first());
-                        messageBuilder = getGroupUpdateMessageBuilder((GroupInfoV2) group,
-                                groupGroupChangePair.second().toByteArray());
-                        sendMessage(messageBuilder, group.getMembersWithout(account.getSelfAddress()));
-                    }
-
-                    groupGroupChangePair = groupHelper.updateGroupV2((GroupInfoV2) group, name, avatarFile);
+                if (result == null || name != null || avatarFile != null) {
+                    Pair<DecryptedGroup, GroupChange> groupGroupChangePair = groupHelper.updateGroupV2(groupInfoV2,
+                            name,
+                            avatarFile);
+                    result = sendUpdateGroupMessage(groupInfoV2,
+                            groupGroupChangePair.first(),
+                            groupGroupChangePair.second());
                 }
 
-                ((GroupInfoV2) group).setGroup(groupGroupChangePair.first());
-                messageBuilder = getGroupUpdateMessageBuilder((GroupInfoV2) group,
-                        groupGroupChangePair.second().toByteArray());
-                g = group;
+                return new Pair<>(group.getGroupId(), result.second());
             } else {
                 GroupInfoV1 gv1 = (GroupInfoV1) group;
                 updateGroupV1(gv1, name, members, avatarFile);
@@ -824,8 +866,46 @@ public class Manager implements Closeable {
         account.getGroupStore().updateGroup(g);
 
         final Pair<Long, List<SendMessageResult>> result = sendMessage(messageBuilder,
-                g.getMembersWithout(account.getSelfAddress()));
-        return new Pair<>(g.groupId, result.second());
+                g.getMembersIncludingPendingWithout(account.getSelfAddress()));
+        return new Pair<>(g.getGroupId(), result.second());
+    }
+
+    public Pair<GroupId, List<SendMessageResult>> joinGroup(
+            GroupInviteLinkUrl inviteLinkUrl
+    ) throws IOException, GroupLinkNotActiveException {
+        return sendJoinGroupMessage(inviteLinkUrl);
+    }
+
+    private Pair<GroupId, List<SendMessageResult>> sendJoinGroupMessage(
+            GroupInviteLinkUrl inviteLinkUrl
+    ) throws IOException, GroupLinkNotActiveException {
+        final DecryptedGroupJoinInfo groupJoinInfo = groupHelper.getDecryptedGroupJoinInfo(inviteLinkUrl.getGroupMasterKey(),
+                inviteLinkUrl.getPassword());
+        final GroupChange groupChange = groupHelper.joinGroup(inviteLinkUrl.getGroupMasterKey(),
+                inviteLinkUrl.getPassword(),
+                groupJoinInfo);
+        final GroupInfoV2 group = getOrMigrateGroup(inviteLinkUrl.getGroupMasterKey(),
+                groupJoinInfo.getRevision() + 1,
+                groupChange.toByteArray());
+
+        if (group.getGroup() == null) {
+            // Only requested member, can't send update to group members
+            return new Pair<>(group.getGroupId(), List.of());
+        }
+
+        final Pair<Long, List<SendMessageResult>> result = sendUpdateGroupMessage(group, group.getGroup(), groupChange);
+
+        return new Pair<>(group.getGroupId(), result.second());
+    }
+
+    private Pair<Long, List<SendMessageResult>> sendUpdateGroupMessage(
+            GroupInfoV2 group, DecryptedGroup newDecryptedGroup, GroupChange groupChange
+    ) throws IOException {
+        group.setGroup(newDecryptedGroup);
+        final SignalServiceDataMessage.Builder messageBuilder = getGroupUpdateMessageBuilder(group,
+                groupChange.toByteArray());
+        account.getGroupStore().updateGroup(group);
+        return sendMessage(messageBuilder, group.getMembersIncludingPendingWithout(account.getSelfAddress()));
     }
 
     private void updateGroupV1(
@@ -854,7 +934,7 @@ public class Manager implements Closeable {
                     newE164Members.remove(contact.getNumber());
                 }
                 throw new IOException("Failed to add members "
-                        + Util.join(", ", newE164Members)
+                        + String.join(", ", newE164Members)
                         + " to group: Not registered on Signal");
             }
 
@@ -863,13 +943,13 @@ public class Manager implements Closeable {
 
         if (avatarFile != null) {
             IOUtils.createPrivateDirectories(pathConfig.getAvatarsPath());
-            File aFile = getGroupAvatarFile(g.groupId);
+            File aFile = getGroupAvatarFile(g.getGroupId());
             Files.copy(Paths.get(avatarFile), aFile.toPath(), StandardCopyOption.REPLACE_EXISTING);
         }
     }
 
     Pair<Long, List<SendMessageResult>> sendUpdateGroupMessage(
-            byte[] groupId, SignalServiceAddress recipient
+            GroupIdV1 groupId, SignalServiceAddress recipient
     ) throws IOException, NotAGroupMemberException, GroupNotFoundException, AttachmentInvalidException {
         GroupInfoV1 g;
         GroupInfo group = getGroupForSending(groupId);
@@ -890,14 +970,14 @@ public class Manager implements Closeable {
 
     private SignalServiceDataMessage.Builder getGroupUpdateMessageBuilder(GroupInfoV1 g) throws AttachmentInvalidException {
         SignalServiceGroup.Builder group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.UPDATE)
-                .withId(g.groupId)
+                .withId(g.getGroupId().serialize())
                 .withName(g.name)
                 .withMembers(new ArrayList<>(g.getMembers()));
 
-        File aFile = getGroupAvatarFile(g.groupId);
+        File aFile = getGroupAvatarFile(g.getGroupId());
         if (aFile.exists()) {
             try {
-                group.withAvatar(Utils.createAttachment(aFile));
+                group.withAvatar(AttachmentUtils.createAttachment(aFile));
             } catch (IOException e) {
                 throw new AttachmentInvalidException(aFile.toString(), e);
             }
@@ -918,10 +998,10 @@ public class Manager implements Closeable {
     }
 
     Pair<Long, List<SendMessageResult>> sendGroupInfoRequest(
-            byte[] groupId, SignalServiceAddress recipient
+            GroupIdV1 groupId, SignalServiceAddress recipient
     ) throws IOException {
         SignalServiceGroup.Builder group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.REQUEST_INFO)
-                .withId(groupId);
+                .withId(groupId.serialize());
 
         SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder()
                 .asGroupMessage(group.build());
@@ -948,7 +1028,7 @@ public class Manager implements Closeable {
         final SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder()
                 .withBody(messageText);
         if (attachments != null) {
-            List<SignalServiceAttachment> attachmentStreams = Utils.getSignalServiceAttachments(attachments);
+            List<SignalServiceAttachment> attachmentStreams = AttachmentUtils.getSignalServiceAttachments(attachments);
 
             // Upload attachments here, so we only upload once even for multiple recipients
             SignalServiceMessageSender messageSender = createMessageSender();
@@ -1027,7 +1107,7 @@ public class Manager implements Closeable {
         account.save();
     }
 
-    public void setGroupBlocked(final byte[] groupId, final boolean blocked) throws GroupNotFoundException {
+    public void setGroupBlocked(final GroupId groupId, final boolean blocked) throws GroupNotFoundException {
         GroupInfo group = getGroup(groupId);
         if (group == null) {
             throw new GroupNotFoundException(groupId);
@@ -1038,8 +1118,8 @@ public class Manager implements Closeable {
         account.save();
     }
 
-    public Pair<byte[], List<SendMessageResult>> updateGroup(
-            byte[] groupId, String name, List<String> members, String avatar
+    public Pair<GroupId, List<SendMessageResult>> updateGroup(
+            GroupId groupId, String name, List<String> members, String avatar
     ) throws IOException, GroupNotFoundException, AttachmentInvalidException, InvalidNumberException, NotAGroupMemberException {
         return sendUpdateGroupMessage(groupId,
                 name,
@@ -1077,7 +1157,7 @@ public class Manager implements Closeable {
     /**
      * Change the expiration timer for a group
      */
-    public void setExpirationTimer(byte[] groupId, int messageExpirationTimer) {
+    public void setExpirationTimer(GroupId groupId, int messageExpirationTimer) {
         GroupInfo g = account.getGroupStore().getGroup(groupId);
         if (g instanceof GroupInfoV1) {
             GroupInfoV1 groupInfoV1 = (GroupInfoV1) g;
@@ -1094,7 +1174,7 @@ public class Manager implements Closeable {
      * @param path Path can be a path to a manifest.json file or to a zip file that contains a manifest.json file
      * @return if successful, returns the URL to install the sticker pack in the signal app
      */
-    public String uploadStickerPack(String path) throws IOException, StickerPackInvalidException {
+    public String uploadStickerPack(File path) throws IOException, StickerPackInvalidException {
         SignalServiceStickerManifestUpload manifest = getSignalServiceStickerManifestUpload(path);
 
         SignalServiceMessageSender messageSender = createMessageSender();
@@ -1119,12 +1199,11 @@ public class Manager implements Closeable {
     }
 
     private SignalServiceStickerManifestUpload getSignalServiceStickerManifestUpload(
-            final String path
+            final File file
     ) throws IOException, StickerPackInvalidException {
         ZipFile zip = null;
         String rootPath = null;
 
-        final File file = new File(path);
         if (file.getName().endsWith(".zip")) {
             zip = new ZipFile(file);
         } else if (file.getName().equals("manifest.json")) {
@@ -1264,7 +1343,7 @@ public class Manager implements Closeable {
         try {
             certificate = accountManager.getSenderCertificate();
         } catch (IOException e) {
-            System.err.println("Failed to get sender certificate: " + e);
+            logger.warn("Failed to get sender certificate, ignoring: {}", e.getMessage());
             return null;
         }
         // TODO cache for a day
@@ -1303,7 +1382,7 @@ public class Manager implements Closeable {
                     missingUuids.stream().map(a -> a.getNumber().get()).collect(Collectors.toSet()),
                     CDS_MRENCLAVE);
         } catch (IOException | Quote.InvalidQuoteFormatException | UnauthenticatedQuoteException | SignatureException | UnauthenticatedResponseException e) {
-            System.err.println("Failed to resolve uuids from server: " + e.getMessage());
+            logger.warn("Failed to resolve uuids from server, ignoring: {}", e.getMessage());
             registeredUsers = new HashMap<>();
         }
 
@@ -1437,7 +1516,7 @@ public class Manager implements Closeable {
     private SignalServiceContent decryptMessage(SignalServiceEnvelope envelope) throws InvalidMetadataMessageException, ProtocolInvalidMessageException, ProtocolDuplicateMessageException, ProtocolLegacyMessageException, ProtocolInvalidKeyIdException, InvalidMetadataVersionException, ProtocolInvalidVersionException, ProtocolNoSessionException, ProtocolInvalidKeyException, SelfSendException, UnsupportedDataMessageException, org.whispersystems.libsignal.UntrustedIdentityException {
         SignalServiceCipher cipher = new SignalServiceCipher(account.getSelfAddress(),
                 account.getSignalProtocolStore(),
-                Utils.getCertificateValidator());
+                certificateValidator);
         try {
             return cipher.decrypt(envelope);
         } catch (ProtocolUntrustedIdentityException e) {
@@ -1491,23 +1570,25 @@ public class Manager implements Closeable {
         if (message.getGroupContext().isPresent()) {
             if (message.getGroupContext().get().getGroupV1().isPresent()) {
                 SignalServiceGroup groupInfo = message.getGroupContext().get().getGroupV1().get();
-                GroupInfo group = account.getGroupStore().getGroupByV1Id(groupInfo.getGroupId());
+                GroupIdV1 groupId = GroupId.v1(groupInfo.getGroupId());
+                GroupInfo group = account.getGroupStore().getGroup(groupId);
                 if (group == null || group instanceof GroupInfoV1) {
                     GroupInfoV1 groupV1 = (GroupInfoV1) group;
                     switch (groupInfo.getType()) {
                         case UPDATE: {
                             if (groupV1 == null) {
-                                groupV1 = new GroupInfoV1(groupInfo.getGroupId());
+                                groupV1 = new GroupInfoV1(groupId);
                             }
 
                             if (groupInfo.getAvatar().isPresent()) {
                                 SignalServiceAttachment avatar = groupInfo.getAvatar().get();
                                 if (avatar.isPointer()) {
                                     try {
-                                        retrieveGroupAvatarAttachment(avatar.asPointer(), groupV1.groupId);
+                                        retrieveGroupAvatarAttachment(avatar.asPointer(), groupV1.getGroupId());
                                     } catch (IOException | InvalidMessageException | MissingConfigurationException e) {
-                                        System.err.println("Failed to retrieve group avatar (" + avatar.asPointer()
-                                                .getRemoteId() + "): " + e.getMessage());
+                                        logger.warn("Failed to retrieve avatar for group {}, ignoring: {}",
+                                                groupId.toBase64(),
+                                                e.getMessage());
                                     }
                                 }
                             }
@@ -1529,7 +1610,7 @@ public class Manager implements Closeable {
                         }
                         case DELIVER:
                             if (groupV1 == null && !isSync) {
-                                actions.add(new SendGroupInfoRequestAction(source, groupInfo.getGroupId()));
+                                actions.add(new SendGroupInfoRequestAction(source, groupId));
                             }
                             break;
                         case QUIT: {
@@ -1541,7 +1622,7 @@ public class Manager implements Closeable {
                         }
                         case REQUEST_INFO:
                             if (groupV1 != null && !isSync) {
-                                actions.add(new SendGroupUpdateAction(source, groupV1.groupId));
+                                actions.add(new SendGroupUpdateAction(source, groupV1.getGroupId()));
                             }
                             break;
                     }
@@ -1553,54 +1634,21 @@ public class Manager implements Closeable {
                 final SignalServiceGroupV2 groupContext = message.getGroupContext().get().getGroupV2().get();
                 final GroupMasterKey groupMasterKey = groupContext.getMasterKey();
 
-                final GroupSecretParams groupSecretParams = GroupSecretParams.deriveFromMasterKey(groupMasterKey);
-
-                byte[] groupId = groupSecretParams.getPublicParams().getGroupIdentifier().serialize();
-                GroupInfo groupInfo = account.getGroupStore().getGroupByV2Id(groupId);
-                if (groupInfo instanceof GroupInfoV1) {
-                    // Received a v2 group message for a v2 group, we need to locally migrate the group
-                    account.getGroupStore().deleteGroup(groupInfo.groupId);
-                    GroupInfoV2 groupInfoV2 = new GroupInfoV2(groupId, groupMasterKey);
-                    groupInfoV2.setGroup(getDecryptedGroup(groupSecretParams));
-                    account.getGroupStore().updateGroup(groupInfoV2);
-                    System.err.println("Locally migrated group "
-                            + Base64.encodeBytes(groupInfo.groupId)
-                            + " to group v2, id: "
-                            + Base64.encodeBytes(groupInfoV2.groupId)
-                            + " !!!");
-                } else if (groupInfo == null || groupInfo instanceof GroupInfoV2) {
-                    GroupInfoV2 groupInfoV2 = groupInfo == null
-                            ? new GroupInfoV2(groupId, groupMasterKey)
-                            : (GroupInfoV2) groupInfo;
-
-                    if (groupInfoV2.getGroup() == null
-                            || groupInfoV2.getGroup().getRevision() < groupContext.getRevision()) {
-                        DecryptedGroup group = null;
-                        if (groupContext.hasSignedGroupChange()
-                                && groupInfoV2.getGroup() != null
-                                && groupInfoV2.getGroup().getRevision() + 1 == groupContext.getRevision()) {
-                            group = groupHelper.getUpdatedDecryptedGroup(groupInfoV2.getGroup(),
-                                    groupContext.getSignedGroupChange(),
-                                    groupMasterKey);
-                        }
-                        if (group == null) {
-                            group = getDecryptedGroup(groupSecretParams);
-                        }
-                        groupInfoV2.setGroup(group);
-                        account.getGroupStore().updateGroup(groupInfoV2);
-                    }
-                }
+                getOrMigrateGroup(groupMasterKey,
+                        groupContext.getRevision(),
+                        groupContext.hasSignedGroupChange() ? groupContext.getSignedGroupChange() : null);
             }
         }
+
         final SignalServiceAddress conversationPartnerAddress = isSync ? destination : source;
-        if (message.isEndSession()) {
+        if (conversationPartnerAddress != null && message.isEndSession()) {
             handleEndSession(conversationPartnerAddress);
         }
         if (message.isExpirationUpdate() || message.getBody().isPresent()) {
             if (message.getGroupContext().isPresent()) {
                 if (message.getGroupContext().get().getGroupV1().isPresent()) {
                     SignalServiceGroup groupInfo = message.getGroupContext().get().getGroupV1().get();
-                    GroupInfoV1 group = account.getGroupStore().getOrCreateGroupV1(groupInfo.getGroupId());
+                    GroupInfoV1 group = account.getGroupStore().getOrCreateGroupV1(GroupId.v1(groupInfo.getGroupId()));
                     if (group != null) {
                         if (group.messageExpirationTime != message.getExpiresInSeconds()) {
                             group.messageExpirationTime = message.getExpiresInSeconds();
@@ -1610,7 +1658,7 @@ public class Manager implements Closeable {
                 } else if (message.getGroupContext().get().getGroupV2().isPresent()) {
                     // disappearing message timer already stored in the DecryptedGroup
                 }
-            } else {
+            } else if (conversationPartnerAddress != null) {
                 ContactInfo contact = account.getContactStore().getContact(conversationPartnerAddress);
                 if (contact == null) {
                     contact = new ContactInfo(conversationPartnerAddress);
@@ -1627,10 +1675,9 @@ public class Manager implements Closeable {
                     try {
                         retrieveAttachment(attachment.asPointer());
                     } catch (IOException | InvalidMessageException | MissingConfigurationException e) {
-                        System.err.println("Failed to retrieve attachment ("
-                                + attachment.asPointer().getRemoteId()
-                                + "): "
-                                + e.getMessage());
+                        logger.warn("Failed to retrieve attachment ({}), ignoring: {}",
+                                attachment.asPointer().getRemoteId(),
+                                e.getMessage());
                     }
                 }
             }
@@ -1655,10 +1702,25 @@ public class Manager implements Closeable {
                     try {
                         retrieveAttachment(attachment);
                     } catch (IOException | InvalidMessageException | MissingConfigurationException e) {
-                        System.err.println("Failed to retrieve attachment ("
-                                + attachment.getRemoteId()
-                                + "): "
-                                + e.getMessage());
+                        logger.warn("Failed to retrieve preview image ({}), ignoring: {}",
+                                attachment.getRemoteId(),
+                                e.getMessage());
+                    }
+                }
+            }
+        }
+        if (message.getQuote().isPresent()) {
+            final SignalServiceDataMessage.Quote quote = message.getQuote().get();
+
+            for (SignalServiceDataMessage.Quote.QuotedAttachment quotedAttachment : quote.getAttachments()) {
+                final SignalServiceAttachment attachment = quotedAttachment.getThumbnail();
+                if (attachment != null && attachment.isPointer()) {
+                    try {
+                        retrieveAttachment(attachment.asPointer());
+                    } catch (IOException | InvalidMessageException | MissingConfigurationException e) {
+                        logger.warn("Failed to retrieve quote attachment thumbnail ({}), ignoring: {}",
+                                attachment.asPointer().getRemoteId(),
+                                e.getMessage());
                     }
                 }
             }
@@ -1674,30 +1736,71 @@ public class Manager implements Closeable {
         return actions;
     }
 
-    private DecryptedGroup getDecryptedGroup(final GroupSecretParams groupSecretParams) {
-        try {
-            final GroupsV2AuthorizationString groupsV2AuthorizationString = getGroupAuthForToday(groupSecretParams);
-            DecryptedGroup group = groupsV2Api.getGroup(groupSecretParams, groupsV2AuthorizationString);
-            for (DecryptedMember member : group.getMembersList()) {
-                final SignalServiceAddress address = resolveSignalServiceAddress(new SignalServiceAddress(UuidUtil.parseOrThrow(
-                        member.getUuid().toByteArray()), null));
-                try {
-                    account.getProfileStore()
-                            .storeProfileKey(address, new ProfileKey(member.getProfileKey().toByteArray()));
-                } catch (InvalidInputException ignored) {
+    private GroupInfoV2 getOrMigrateGroup(
+            final GroupMasterKey groupMasterKey, final int revision, final byte[] signedGroupChange
+    ) {
+        final GroupSecretParams groupSecretParams = GroupSecretParams.deriveFromMasterKey(groupMasterKey);
+
+        GroupIdV2 groupId = GroupUtils.getGroupIdV2(groupSecretParams);
+        GroupInfo groupInfo = account.getGroupStore().getGroup(groupId);
+        final GroupInfoV2 groupInfoV2;
+        if (groupInfo instanceof GroupInfoV1) {
+            // Received a v2 group message for a v1 group, we need to locally migrate the group
+            account.getGroupStore().deleteGroup(groupInfo.getGroupId());
+            groupInfoV2 = new GroupInfoV2(groupId, groupMasterKey);
+            logger.info("Locally migrated group {} to group v2, id: {}",
+                    groupInfo.getGroupId().toBase64(),
+                    groupInfoV2.getGroupId().toBase64());
+        } else if (groupInfo instanceof GroupInfoV2) {
+            groupInfoV2 = (GroupInfoV2) groupInfo;
+        } else {
+            groupInfoV2 = new GroupInfoV2(groupId, groupMasterKey);
+        }
+
+        if (groupInfoV2.getGroup() == null || groupInfoV2.getGroup().getRevision() < revision) {
+            DecryptedGroup group = null;
+            if (signedGroupChange != null
+                    && groupInfoV2.getGroup() != null
+                    && groupInfoV2.getGroup().getRevision() + 1 == revision) {
+                group = groupHelper.getUpdatedDecryptedGroup(groupInfoV2.getGroup(), signedGroupChange, groupMasterKey);
+            }
+            if (group == null) {
+                group = groupHelper.getDecryptedGroup(groupSecretParams);
+            }
+            if (group != null) {
+                storeProfileKeysFromMembers(group);
+                final String avatar = group.getAvatar();
+                if (avatar != null && !avatar.isEmpty()) {
+                    try {
+                        retrieveGroupAvatar(groupId, groupSecretParams, avatar);
+                    } catch (IOException e) {
+                        logger.warn("Failed to download group avatar, ignoring: {}", e.getMessage());
+                    }
                 }
             }
-            return group;
-        } catch (IOException | VerificationFailedException | InvalidGroupStateException e) {
-            System.err.println("Failed to retrieve Group V2 info, ignoring ...");
-            return null;
+            groupInfoV2.setGroup(group);
+            account.getGroupStore().updateGroup(groupInfoV2);
+        }
+
+        return groupInfoV2;
+    }
+
+    private void storeProfileKeysFromMembers(final DecryptedGroup group) {
+        for (DecryptedMember member : group.getMembersList()) {
+            final SignalServiceAddress address = resolveSignalServiceAddress(new SignalServiceAddress(UuidUtil.parseOrThrow(
+                    member.getUuid().toByteArray()), null));
+            try {
+                account.getProfileStore()
+                        .storeProfileKey(address, new ProfileKey(member.getProfileKey().toByteArray()));
+            } catch (InvalidInputException ignored) {
+            }
         }
     }
 
     private void retryFailedReceivedMessages(
             ReceiveMessageHandler handler, boolean ignoreAttachments
     ) {
-        final File cachePath = new File(getMessageCachePath());
+        final File cachePath = getMessageCachePath();
         if (!cachePath.exists()) {
             return;
         }
@@ -1723,7 +1826,7 @@ public class Manager implements Closeable {
     ) {
         SignalServiceEnvelope envelope;
         try {
-            envelope = Utils.loadEnvelope(fileEntry);
+            envelope = MessageCacheUtils.loadEnvelope(fileEntry);
             if (envelope == null) {
                 return;
             }
@@ -1742,7 +1845,7 @@ public class Manager implements Closeable {
                 try {
                     Files.delete(fileEntry.toPath());
                 } catch (IOException e) {
-                    System.err.println("Failed to delete cached message file “" + fileEntry + "”: " + e.getMessage());
+                    logger.warn("Failed to delete cached message file “{}”, ignoring: {}", fileEntry, e.getMessage());
                 }
                 return;
             }
@@ -1760,7 +1863,7 @@ public class Manager implements Closeable {
         try {
             Files.delete(fileEntry.toPath());
         } catch (IOException e) {
-            System.err.println("Failed to delete cached message file “" + fileEntry + "”: " + e.getMessage());
+            logger.warn("Failed to delete cached message file “{}”, ignoring: {}", fileEntry, e.getMessage());
         }
     }
 
@@ -1790,10 +1893,9 @@ public class Manager implements Closeable {
                     try {
                         String source = envelope1.getSourceE164().isPresent() ? envelope1.getSourceE164().get() : "";
                         File cacheFile = getMessageCacheFile(source, now, envelope1.getTimestamp());
-                        Utils.storeEnvelope(envelope1, cacheFile);
+                        MessageCacheUtils.storeEnvelope(envelope1, cacheFile);
                     } catch (IOException e) {
-                        System.err.println("Failed to store encrypted message in disk cache, ignoring: "
-                                + e.getMessage());
+                        logger.warn("Failed to store encrypted message in disk cache, ignoring: {}", e.getMessage());
                     }
                 });
                 if (result.isPresent()) {
@@ -1822,7 +1924,7 @@ public class Manager implements Closeable {
                 if (returnOnTimeout) return;
                 continue;
             } catch (InvalidVersionException e) {
-                System.err.println("Ignoring error: " + e.getMessage());
+                logger.warn("Error while receiving messages, ignoring: {}", e.getMessage());
                 continue;
             }
 
@@ -1864,9 +1966,9 @@ public class Manager implements Closeable {
                     cacheFile = getMessageCacheFile(source, now, envelope.getTimestamp());
                     Files.delete(cacheFile.toPath());
                     // Try to delete directory if empty
-                    new File(getMessageCachePath()).delete();
+                    getMessageCachePath().delete();
                 } catch (IOException e) {
-                    System.err.println("Failed to delete cached message file “" + cacheFile + "”: " + e.getMessage());
+                    logger.warn("Failed to delete cached message file “{}”, ignoring: {}", cacheFile, e.getMessage());
                 }
             }
         }
@@ -1890,10 +1992,18 @@ public class Manager implements Closeable {
 
         if (content != null && content.getDataMessage().isPresent()) {
             SignalServiceDataMessage message = content.getDataMessage().get();
-            if (message.getGroupContext().isPresent() && message.getGroupContext().get().getGroupV1().isPresent()) {
-                SignalServiceGroup groupInfo = message.getGroupContext().get().getGroupV1().get();
-                GroupInfo group = getGroup(groupInfo.getGroupId());
-                return groupInfo.getType() == SignalServiceGroup.Type.DELIVER && group != null && group.isBlocked();
+            if (message.getGroupContext().isPresent()) {
+                if (message.getGroupContext().get().getGroupV1().isPresent()) {
+                    SignalServiceGroup groupInfo = message.getGroupContext().get().getGroupV1().get();
+                    if (groupInfo.getType() != SignalServiceGroup.Type.DELIVER) {
+                        return false;
+                    }
+                }
+                GroupId groupId = GroupUtils.getGroupId(message.getGroupContext().get());
+                GroupInfo group = account.getGroupStore().getGroup(groupId);
+                if (group != null && group.isBlocked()) {
+                    return true;
+                }
             }
         }
         return false;
@@ -1932,13 +2042,11 @@ public class Manager implements Closeable {
                 if (syncMessage.getSent().isPresent()) {
                     SentTranscriptMessage message = syncMessage.getSent().get();
                     final SignalServiceAddress destination = message.getDestination().orNull();
-                    if (destination != null) {
-                        actions.addAll(handleSignalServiceDataMessage(message.getMessage(),
-                                true,
-                                sender,
-                                destination,
-                                ignoreAttachments));
-                    }
+                    actions.addAll(handleSignalServiceDataMessage(message.getMessage(),
+                            true,
+                            sender,
+                            destination,
+                            ignoreAttachments));
                 }
                 if (syncMessage.getRequest().isPresent()) {
                     RequestMessage rm = syncMessage.getRequest().get();
@@ -1963,7 +2071,8 @@ public class Manager implements Closeable {
                             DeviceGroupsInputStream s = new DeviceGroupsInputStream(attachmentAsStream);
                             DeviceGroup g;
                             while ((g = s.read()) != null) {
-                                GroupInfoV1 syncGroup = account.getGroupStore().getOrCreateGroupV1(g.getId());
+                                GroupInfoV1 syncGroup = account.getGroupStore()
+                                        .getOrCreateGroupV1(GroupId.v1(g.getId()));
                                 if (syncGroup != null) {
                                     if (g.getName().isPresent()) {
                                         syncGroup.name = g.getName().get();
@@ -1984,7 +2093,7 @@ public class Manager implements Closeable {
                                     }
 
                                     if (g.getAvatar().isPresent()) {
-                                        retrieveGroupAvatarAttachment(g.getAvatar().get(), syncGroup.groupId);
+                                        retrieveGroupAvatarAttachment(g.getAvatar().get(), syncGroup.getGroupId());
                                     }
                                     syncGroup.inboxPosition = g.getInboxPosition().orNull();
                                     syncGroup.archived = g.isArchived();
@@ -1993,16 +2102,18 @@ public class Manager implements Closeable {
                             }
                         }
                     } catch (Exception e) {
+                        logger.warn("Failed to handle received sync groups “{}”, ignoring: {}",
+                                tmpFile,
+                                e.getMessage());
                         e.printStackTrace();
                     } finally {
                         if (tmpFile != null) {
                             try {
                                 Files.delete(tmpFile.toPath());
                             } catch (IOException e) {
-                                System.err.println("Failed to delete received groups temp file “"
-                                        + tmpFile
-                                        + "”: "
-                                        + e.getMessage());
+                                logger.warn("Failed to delete received groups temp file “{}”, ignoring: {}",
+                                        tmpFile,
+                                        e.getMessage());
                             }
                         }
                     }
@@ -2012,12 +2123,15 @@ public class Manager implements Closeable {
                     for (SignalServiceAddress address : blockedListMessage.getAddresses()) {
                         setContactBlocked(resolveSignalServiceAddress(address), true);
                     }
-                    for (byte[] groupId : blockedListMessage.getGroupIds()) {
+                    for (GroupId groupId : blockedListMessage.getGroupIds()
+                            .stream()
+                            .map(GroupId::unknownVersion)
+                            .collect(Collectors.toSet())) {
                         try {
                             setGroupBlocked(groupId, true);
                         } catch (GroupNotFoundException e) {
-                            System.err.println("BlockedListMessage contained groupID that was not found in GroupStore: "
-                                    + Base64.encodeBytes(groupId));
+                            logger.warn("BlockedListMessage contained groupID that was not found in GroupStore: {}",
+                                    groupId.toBase64());
                         }
                     }
                 }
@@ -2078,10 +2192,9 @@ public class Manager implements Closeable {
                             try {
                                 Files.delete(tmpFile.toPath());
                             } catch (IOException e) {
-                                System.err.println("Failed to delete received contacts temp file “"
-                                        + tmpFile
-                                        + "”: "
-                                        + e.getMessage());
+                                logger.warn("Failed to delete received contacts temp file “{}”, ignoring: {}",
+                                        tmpFile,
+                                        e.getMessage());
                             }
                         }
                     }
@@ -2133,16 +2246,16 @@ public class Manager implements Closeable {
             return retrieveAttachment(pointer, getContactAvatarFile(number), false);
         } else {
             SignalServiceAttachmentStream stream = attachment.asStream();
-            return Utils.retrieveAttachment(stream, getContactAvatarFile(number));
+            return AttachmentUtils.retrieveAttachment(stream, getContactAvatarFile(number));
         }
     }
 
-    private File getGroupAvatarFile(byte[] groupId) {
-        return new File(pathConfig.getAvatarsPath(), "group-" + Base64.encodeBytes(groupId).replace("/", "_"));
+    private File getGroupAvatarFile(GroupId groupId) {
+        return new File(pathConfig.getAvatarsPath(), "group-" + groupId.toBase64().replace("/", "_"));
     }
 
     private File retrieveGroupAvatarAttachment(
-            SignalServiceAttachment attachment, byte[] groupId
+            SignalServiceAttachment attachment, GroupId groupId
     ) throws IOException, InvalidMessageException, MissingConfigurationException {
         IOUtils.createPrivateDirectories(pathConfig.getAvatarsPath());
         if (attachment.isPointer()) {
@@ -2150,10 +2263,41 @@ public class Manager implements Closeable {
             return retrieveAttachment(pointer, getGroupAvatarFile(groupId), false);
         } else {
             SignalServiceAttachmentStream stream = attachment.asStream();
-            return Utils.retrieveAttachment(stream, getGroupAvatarFile(groupId));
+            return AttachmentUtils.retrieveAttachment(stream, getGroupAvatarFile(groupId));
         }
     }
 
+    private File retrieveGroupAvatar(
+            GroupId groupId, GroupSecretParams groupSecretParams, String cdnKey
+    ) throws IOException {
+        IOUtils.createPrivateDirectories(pathConfig.getAvatarsPath());
+        SignalServiceMessageReceiver receiver = getOrCreateMessageReceiver();
+        File outputFile = getGroupAvatarFile(groupId);
+        GroupsV2Operations.GroupOperations groupOperations = groupsV2Operations.forGroup(groupSecretParams);
+
+        File tmpFile = IOUtils.createTempFile();
+        tmpFile.deleteOnExit();
+        try (InputStream input = receiver.retrieveGroupsV2ProfileAvatar(cdnKey,
+                tmpFile,
+                ServiceConfig.AVATAR_DOWNLOAD_FAILSAFE_MAX_SIZE)) {
+            byte[] encryptedData = IOUtils.readFully(input);
+
+            byte[] decryptedData = groupOperations.decryptAvatar(encryptedData);
+            try (OutputStream output = new FileOutputStream(outputFile)) {
+                output.write(decryptedData);
+            }
+        } finally {
+            try {
+                Files.delete(tmpFile.toPath());
+            } catch (IOException e) {
+                logger.warn("Failed to delete received group avatar temp file “{}”, ignoring: {}",
+                        tmpFile,
+                        e.getMessage());
+            }
+        }
+        return outputFile;
+    }
+
     private File getProfileAvatarFile(SignalServiceAddress address) {
         return new File(pathConfig.getAvatarsPath(), "profile-" + address.getLegacyIdentifier());
     }
@@ -2176,7 +2320,9 @@ public class Manager implements Closeable {
             try {
                 Files.delete(tmpFile.toPath());
             } catch (IOException e) {
-                System.err.println("Failed to delete received avatar temp file “" + tmpFile + "”: " + e.getMessage());
+                logger.warn("Failed to delete received profile avatar temp file “{}”, ignoring: {}",
+                        tmpFile,
+                        e.getMessage());
             }
         }
         return outputFile;
@@ -2216,10 +2362,9 @@ public class Manager implements Closeable {
             try {
                 Files.delete(tmpFile.toPath());
             } catch (IOException e) {
-                System.err.println("Failed to delete received attachment temp file “"
-                        + tmpFile
-                        + "”: "
-                        + e.getMessage());
+                logger.warn("Failed to delete received attachment temp file “{}”, ignoring: {}",
+                        tmpFile,
+                        e.getMessage());
             }
         }
         return outputFile;
@@ -2241,10 +2386,10 @@ public class Manager implements Closeable {
                 for (GroupInfo record : account.getGroupStore().getGroups()) {
                     if (record instanceof GroupInfoV1) {
                         GroupInfoV1 groupInfo = (GroupInfoV1) record;
-                        out.write(new DeviceGroup(groupInfo.groupId,
+                        out.write(new DeviceGroup(groupInfo.getGroupId().serialize(),
                                 Optional.fromNullable(groupInfo.name),
                                 new ArrayList<>(groupInfo.getMembers()),
-                                createGroupAvatarAttachment(groupInfo.groupId),
+                                createGroupAvatarAttachment(groupInfo.getGroupId()),
                                 groupInfo.isMember(account.getSelfAddress()),
                                 Optional.of(groupInfo.messageExpirationTime),
                                 Optional.fromNullable(groupInfo.color),
@@ -2270,7 +2415,7 @@ public class Manager implements Closeable {
             try {
                 Files.delete(groupsFile.toPath());
             } catch (IOException e) {
-                System.err.println("Failed to delete groups temp file “" + groupsFile + "”: " + e.getMessage());
+                logger.warn("Failed to delete groups temp file “{}”, ignoring: {}", groupsFile, e.getMessage());
             }
         }
     }
@@ -2283,8 +2428,7 @@ public class Manager implements Closeable {
                 DeviceContactsOutputStream out = new DeviceContactsOutputStream(fos);
                 for (ContactInfo record : account.getContactStore().getContacts()) {
                     VerifiedMessage verifiedMessage = null;
-                    JsonIdentityKeyStore.Identity currentIdentity = account.getSignalProtocolStore()
-                            .getIdentity(record.getAddress());
+                    IdentityInfo currentIdentity = account.getSignalProtocolStore().getIdentity(record.getAddress());
                     if (currentIdentity != null) {
                         verifiedMessage = new VerifiedMessage(record.getAddress(),
                                 currentIdentity.getIdentityKey(),
@@ -2335,7 +2479,7 @@ public class Manager implements Closeable {
             try {
                 Files.delete(contactsFile.toPath());
             } catch (IOException e) {
-                System.err.println("Failed to delete contacts temp file “" + contactsFile + "”: " + e.getMessage());
+                logger.warn("Failed to delete contacts temp file “{}”, ignoring: {}", contactsFile, e.getMessage());
             }
         }
     }
@@ -2350,7 +2494,7 @@ public class Manager implements Closeable {
         List<byte[]> groupIds = new ArrayList<>();
         for (GroupInfo record : account.getGroupStore().getGroups()) {
             if (record.isBlocked()) {
-                groupIds.add(record.groupId);
+                groupIds.add(record.getGroupId().serialize());
             }
         }
         sendSyncMessage(SignalServiceSyncMessage.forBlocked(new BlockedListMessage(addresses, groupIds)));
@@ -2371,18 +2515,18 @@ public class Manager implements Closeable {
     }
 
     public ContactInfo getContact(String number) {
-        return account.getContactStore().getContact(Util.getSignalServiceAddressFromIdentifier(number));
+        return account.getContactStore().getContact(Utils.getSignalServiceAddressFromIdentifier(number));
     }
 
-    public GroupInfo getGroup(byte[] groupId) {
+    public GroupInfo getGroup(GroupId groupId) {
         return account.getGroupStore().getGroup(groupId);
     }
 
-    public List<JsonIdentityKeyStore.Identity> getIdentities() {
+    public List<IdentityInfo> getIdentities() {
         return account.getSignalProtocolStore().getIdentities();
     }
 
-    public List<JsonIdentityKeyStore.Identity> getIdentities(String number) throws InvalidNumberException {
+    public List<IdentityInfo> getIdentities(String number) throws InvalidNumberException {
         return account.getSignalProtocolStore().getIdentities(canonicalizeAndResolveSignalServiceAddress(number));
     }
 
@@ -2394,11 +2538,11 @@ public class Manager implements Closeable {
      */
     public boolean trustIdentityVerified(String name, byte[] fingerprint) throws InvalidNumberException {
         SignalServiceAddress address = canonicalizeAndResolveSignalServiceAddress(name);
-        List<JsonIdentityKeyStore.Identity> ids = account.getSignalProtocolStore().getIdentities(address);
+        List<IdentityInfo> ids = account.getSignalProtocolStore().getIdentities(address);
         if (ids == null) {
             return false;
         }
-        for (JsonIdentityKeyStore.Identity id : ids) {
+        for (IdentityInfo id : ids) {
             if (!Arrays.equals(id.getIdentityKey().serialize(), fingerprint)) {
                 continue;
             }
@@ -2424,11 +2568,11 @@ public class Manager implements Closeable {
      */
     public boolean trustIdentityVerifiedSafetyNumber(String name, String safetyNumber) throws InvalidNumberException {
         SignalServiceAddress address = canonicalizeAndResolveSignalServiceAddress(name);
-        List<JsonIdentityKeyStore.Identity> ids = account.getSignalProtocolStore().getIdentities(address);
+        List<IdentityInfo> ids = account.getSignalProtocolStore().getIdentities(address);
         if (ids == null) {
             return false;
         }
-        for (JsonIdentityKeyStore.Identity id : ids) {
+        for (IdentityInfo id : ids) {
             if (!safetyNumber.equals(computeSafetyNumber(address, id.getIdentityKey()))) {
                 continue;
             }
@@ -2453,11 +2597,11 @@ public class Manager implements Closeable {
      */
     public boolean trustIdentityAllKeys(String name) {
         SignalServiceAddress address = resolveSignalServiceAddress(name);
-        List<JsonIdentityKeyStore.Identity> ids = account.getSignalProtocolStore().getIdentities(address);
+        List<IdentityInfo> ids = account.getSignalProtocolStore().getIdentities(address);
         if (ids == null) {
             return false;
         }
-        for (JsonIdentityKeyStore.Identity id : ids) {
+        for (IdentityInfo id : ids) {
             if (id.getTrustLevel() == TrustLevel.UNTRUSTED) {
                 account.getSignalProtocolStore()
                         .setIdentityTrustLevel(address, id.getIdentityKey(), TrustLevel.TRUSTED_UNVERIFIED);
@@ -2475,7 +2619,8 @@ public class Manager implements Closeable {
     public String computeSafetyNumber(
             SignalServiceAddress theirAddress, IdentityKey theirIdentityKey
     ) {
-        return Utils.computeSafetyNumber(account.getSelfAddress(),
+        return Utils.computeSafetyNumber(ServiceConfig.capabilities.isUuid(),
+                account.getSelfAddress(),
                 getIdentityKeyPair().getPublicKey(),
                 theirAddress,
                 theirIdentityKey);
@@ -2488,12 +2633,12 @@ public class Manager implements Closeable {
     public SignalServiceAddress canonicalizeAndResolveSignalServiceAddress(String identifier) throws InvalidNumberException {
         String canonicalizedNumber = UuidUtil.isUuid(identifier)
                 ? identifier
-                : Util.canonicalizeNumber(identifier, account.getUsername());
+                : PhoneNumberFormatter.formatNumber(identifier, account.getUsername());
         return resolveSignalServiceAddress(canonicalizedNumber);
     }
 
     public SignalServiceAddress resolveSignalServiceAddress(String identifier) {
-        SignalServiceAddress address = Util.getSignalServiceAddressFromIdentifier(identifier);
+        SignalServiceAddress address = Utils.getSignalServiceAddressFromIdentifier(identifier);
 
         return resolveSignalServiceAddress(address);
     }