]> nmode's Git Repositories - signal-cli/blobdiff - lib/src/main/java/org/asamk/signal/manager/ManagerImpl.java
Refactor set blocked methods to accept multiple recipientIds/groupIds
[signal-cli] / lib / src / main / java / org / asamk / signal / manager / ManagerImpl.java
index fdb289295651790a8bb18c8ac4407a36d6d3f1cd..f6205dba7c7c59b0fb3ae83644a5f48c01f35bbb 100644 (file)
@@ -1,5 +1,5 @@
 /*
-  Copyright (C) 2015-2021 AsamK and contributors
+  Copyright (C) 2015-2022 AsamK and contributors
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -16,6 +16,7 @@
  */
 package org.asamk.signal.manager;
 
+import org.asamk.signal.manager.api.AttachmentInvalidException;
 import org.asamk.signal.manager.api.Configuration;
 import org.asamk.signal.manager.api.Device;
 import org.asamk.signal.manager.api.Group;
@@ -24,15 +25,20 @@ import org.asamk.signal.manager.api.InactiveGroupLinkException;
 import org.asamk.signal.manager.api.InvalidDeviceLinkException;
 import org.asamk.signal.manager.api.InvalidStickerException;
 import org.asamk.signal.manager.api.Message;
+import org.asamk.signal.manager.api.NotMasterDeviceException;
 import org.asamk.signal.manager.api.Pair;
 import org.asamk.signal.manager.api.RecipientIdentifier;
 import org.asamk.signal.manager.api.SendGroupMessageResults;
 import org.asamk.signal.manager.api.SendMessageResult;
 import org.asamk.signal.manager.api.SendMessageResults;
 import org.asamk.signal.manager.api.StickerPack;
+import org.asamk.signal.manager.api.StickerPackId;
+import org.asamk.signal.manager.api.StickerPackInvalidException;
+import org.asamk.signal.manager.api.StickerPackUrl;
 import org.asamk.signal.manager.api.TypingAction;
 import org.asamk.signal.manager.api.UnregisteredRecipientException;
 import org.asamk.signal.manager.api.UpdateGroup;
+import org.asamk.signal.manager.api.UserStatus;
 import org.asamk.signal.manager.config.ServiceEnvironmentConfig;
 import org.asamk.signal.manager.groups.GroupId;
 import org.asamk.signal.manager.groups.GroupInviteLinkUrl;
@@ -40,6 +46,7 @@ import org.asamk.signal.manager.groups.GroupNotFoundException;
 import org.asamk.signal.manager.groups.GroupSendingNotAllowedException;
 import org.asamk.signal.manager.groups.LastGroupAdminException;
 import org.asamk.signal.manager.groups.NotAGroupMemberException;
+import org.asamk.signal.manager.helper.AccountFileUpdater;
 import org.asamk.signal.manager.helper.Context;
 import org.asamk.signal.manager.storage.SignalAccount;
 import org.asamk.signal.manager.storage.groups.GroupInfo;
@@ -48,51 +55,53 @@ import org.asamk.signal.manager.storage.recipients.Contact;
 import org.asamk.signal.manager.storage.recipients.Profile;
 import org.asamk.signal.manager.storage.recipients.RecipientAddress;
 import org.asamk.signal.manager.storage.recipients.RecipientId;
+import org.asamk.signal.manager.storage.stickerPacks.JsonStickerPack;
+import org.asamk.signal.manager.storage.stickerPacks.StickerPackStore;
 import org.asamk.signal.manager.storage.stickers.Sticker;
-import org.asamk.signal.manager.storage.stickers.StickerPackId;
 import org.asamk.signal.manager.util.AttachmentUtils;
 import org.asamk.signal.manager.util.KeyUtils;
 import org.asamk.signal.manager.util.StickerUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import org.whispersystems.libsignal.util.guava.Optional;
 import org.whispersystems.signalservice.api.SignalSessionLock;
 import org.whispersystems.signalservice.api.messages.SignalServiceDataMessage;
 import org.whispersystems.signalservice.api.messages.SignalServiceReceiptMessage;
 import org.whispersystems.signalservice.api.messages.SignalServiceTypingMessage;
+import org.whispersystems.signalservice.api.push.ACI;
 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.internal.util.DynamicCredentialsProvider;
 import org.whispersystems.signalservice.internal.util.Hex;
 import org.whispersystems.signalservice.internal.util.Util;
 
 import java.io.File;
 import java.io.IOException;
 import java.net.URI;
-import java.net.URISyntaxException;
-import java.net.URLEncoder;
-import java.nio.charset.StandardCharsets;
 import java.time.Duration;
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
+import java.util.Optional;
 import java.util.Set;
-import java.util.UUID;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
+import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.locks.ReentrantLock;
 import java.util.function.Function;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
-public class ManagerImpl implements Manager {
+import io.reactivex.rxjava3.disposables.CompositeDisposable;
+
+class ManagerImpl implements Manager {
 
     private final static Logger logger = LoggerFactory.getLogger(ManagerImpl.class);
 
     private SignalAccount account;
+    private AccountFileUpdater accountFileUpdater;
     private final SignalDependencies dependencies;
     private final Context context;
 
@@ -103,19 +112,19 @@ public class ManagerImpl implements Manager {
     private final Set<ReceiveMessageHandler> weakHandlers = new HashSet<>();
     private final Set<ReceiveMessageHandler> messageHandlers = new HashSet<>();
     private final List<Runnable> closedListeners = new ArrayList<>();
+    private final List<Runnable> addressChangedListeners = new ArrayList<>();
+    private final CompositeDisposable disposable = new CompositeDisposable();
 
     ManagerImpl(
             SignalAccount account,
             PathConfig pathConfig,
+            AccountFileUpdater accountFileUpdater,
             ServiceEnvironmentConfig serviceEnvironmentConfig,
             String userAgent
     ) {
         this.account = account;
+        this.accountFileUpdater = accountFileUpdater;
 
-        final var credentialsProvider = new DynamicCredentialsProvider(account.getAci(),
-                account.getAccount(),
-                account.getPassword(),
-                account.getDeviceId());
         final var sessionLock = new SignalSessionLock() {
             private final ReentrantLock LEGACY_LOCK = new ReentrantLock();
 
@@ -127,15 +136,28 @@ public class ManagerImpl implements Manager {
         };
         this.dependencies = new SignalDependencies(serviceEnvironmentConfig,
                 userAgent,
-                credentialsProvider,
-                account.getSignalProtocolStore(),
+                account.getCredentialsProvider(),
+                account.getSignalServiceDataStore(),
                 executor,
                 sessionLock);
         final var avatarStore = new AvatarStore(pathConfig.avatarsPath());
         final var attachmentStore = new AttachmentStore(pathConfig.attachmentsPath());
         final var stickerPackStore = new StickerPackStore(pathConfig.stickerPacksPath());
 
-        this.context = new Context(account, dependencies, avatarStore, attachmentStore, stickerPackStore);
+        this.context = new Context(account, new AccountFileUpdater() {
+            @Override
+            public void updateAccountIdentifiers(final String number, final ACI aci) {
+                accountFileUpdater.updateAccountIdentifiers(number, aci);
+                synchronized (addressChangedListeners) {
+                    addressChangedListeners.forEach(Runnable::run);
+                }
+            }
+
+            @Override
+            public void removeAccount() {
+                accountFileUpdater.removeAccount();
+            }
+        }, dependencies, avatarStore, attachmentStore, stickerPackStore);
         this.context.getAccountHelper().setUnregisteredListener(this::close);
         this.context.getReceiveHelper().setAuthenticationFailureListener(this::close);
         this.context.getReceiveHelper().setCaughtUpWithOldMessagesListener(() -> {
@@ -143,23 +165,36 @@ public class ManagerImpl implements Manager {
                 this.notifyAll();
             }
         });
+        disposable.add(account.getIdentityKeyStore().getIdentityChanges().subscribe(recipientId -> {
+            logger.trace("Archiving old sessions for {}", recipientId);
+            account.getSessionStore().archiveSessions(recipientId);
+            account.getSenderKeyStore().deleteSharedWith(recipientId);
+            final var profile = account.getRecipientStore().getProfile(recipientId);
+            if (profile != null) {
+                account.getRecipientStore()
+                        .storeProfile(recipientId,
+                                Profile.newBuilder(profile)
+                                        .withUnidentifiedAccessMode(Profile.UnidentifiedAccessMode.UNKNOWN)
+                                        .withLastUpdateTimestamp(0)
+                                        .build());
+            }
+        }));
     }
 
     @Override
     public String getSelfNumber() {
-        return account.getAccount();
+        return account.getNumber();
     }
 
-    @Override
-    public void checkAccountState() throws IOException {
+    void checkAccountState() throws IOException {
         context.getAccountHelper().checkAccountState();
     }
 
     @Override
-    public Map<String, Pair<String, UUID>> areUsersRegistered(Set<String> numbers) throws IOException {
+    public Map<String, UserStatus> getUserStatus(Set<String> numbers) throws IOException {
         final var canonicalizedNumbers = numbers.stream().collect(Collectors.toMap(n -> n, n -> {
             try {
-                final var canonicalizedNumber = PhoneNumberFormatter.formatNumber(n, account.getAccount());
+                final var canonicalizedNumber = PhoneNumberFormatter.formatNumber(n, account.getNumber());
                 if (!canonicalizedNumber.equals(n)) {
                     logger.debug("Normalized number {} to {}.", n, canonicalizedNumber);
                 }
@@ -179,7 +214,13 @@ public class ManagerImpl implements Manager {
         return numbers.stream().collect(Collectors.toMap(n -> n, n -> {
             final var number = canonicalizedNumbers.get(n);
             final var aci = registeredUsers.get(number);
-            return new Pair<>(number.isEmpty() ? null : number, aci == null ? null : aci.uuid());
+            final var profile = aci == null
+                    ? null
+                    : context.getProfileHelper().getRecipientProfile(account.getRecipientStore().resolveRecipient(aci));
+            return new UserStatus(number.isEmpty() ? null : number,
+                    aci == null ? null : aci.uuid(),
+                    profile != null
+                            && profile.getUnidentifiedAccessMode() == Profile.UnidentifiedAccessMode.UNRESTRICTED);
         }));
     }
 
@@ -223,14 +264,9 @@ public class ManagerImpl implements Manager {
 
     @Override
     public void setProfile(
-            String givenName, final String familyName, String about, String aboutEmoji, java.util.Optional<File> avatar
+            String givenName, final String familyName, String about, String aboutEmoji, Optional<File> avatar
     ) throws IOException {
-        context.getProfileHelper()
-                .setProfile(givenName,
-                        familyName,
-                        about,
-                        aboutEmoji,
-                        avatar == null ? null : Optional.fromNullable(avatar.orElse(null)));
+        context.getProfileHelper().setProfile(givenName, familyName, about, aboutEmoji, avatar);
         context.getSyncHelper().sendSyncFetchProfileMessage();
     }
 
@@ -255,7 +291,7 @@ public class ManagerImpl implements Manager {
     public List<Device> getLinkedDevices() throws IOException {
         var devices = dependencies.getAccountManager().getDevices();
         account.setMultiDevice(devices.size() > 1);
-        var identityKey = account.getIdentityKeyPair().getPrivateKey();
+        var identityKey = account.getAciIdentityKeyPair().getPrivateKey();
         return devices.stream().map(d -> {
             String deviceName = d.getName();
             if (deviceName != null) {
@@ -274,7 +310,7 @@ public class ManagerImpl implements Manager {
     }
 
     @Override
-    public void removeLinkedDevices(long deviceId) throws IOException {
+    public void removeLinkedDevices(int deviceId) throws IOException {
         context.getAccountHelper().removeLinkedDevices(deviceId);
     }
 
@@ -285,7 +321,7 @@ public class ManagerImpl implements Manager {
     }
 
     @Override
-    public void setRegistrationLockPin(java.util.Optional<String> pin) throws IOException, NotMasterDeviceException {
+    public void setRegistrationLockPin(Optional<String> pin) throws IOException, NotMasterDeviceException {
         if (!account.isMasterDevice()) {
             throw new NotMasterDeviceException();
         }
@@ -330,6 +366,11 @@ public class ManagerImpl implements Manager {
 
     @Override
     public void deleteGroup(GroupId groupId) throws IOException {
+        final var group = context.getGroupHelper().getGroup(groupId);
+        if (group.isMember(account.getSelfRecipientId())) {
+            throw new IOException(
+                    "The local group information cannot be removed, as the user is still a member of the group");
+        }
         context.getGroupHelper().deleteGroup(groupId);
     }
 
@@ -363,6 +404,12 @@ public class ManagerImpl implements Manager {
                         updateGroup.getRemoveAdmins() == null
                                 ? null
                                 : context.getRecipientHelper().resolveRecipients(updateGroup.getRemoveAdmins()),
+                        updateGroup.getBanMembers() == null
+                                ? null
+                                : context.getRecipientHelper().resolveRecipients(updateGroup.getBanMembers()),
+                        updateGroup.getUnbanMembers() == null
+                                ? null
+                                : context.getRecipientHelper().resolveRecipients(updateGroup.getUnbanMembers()),
                         updateGroup.isResetGroupLink(),
                         updateGroup.getGroupLinkState(),
                         updateGroup.getAddMemberPermission(),
@@ -419,7 +466,7 @@ public class ManagerImpl implements Manager {
         final var timestamp = System.currentTimeMillis();
         for (var recipient : recipients) {
             if (recipient instanceof RecipientIdentifier.Single single) {
-                final var message = new SignalServiceTypingMessage(action, timestamp, Optional.absent());
+                final var message = new SignalServiceTypingMessage(action, timestamp, Optional.empty());
                 try {
                     final var recipientId = context.getRecipientHelper().resolveRecipient(single);
                     final var result = context.getSendHelper().sendTypingMessage(message, recipientId);
@@ -488,6 +535,11 @@ public class ManagerImpl implements Manager {
     public SendMessageResults sendMessage(
             Message message, Set<RecipientIdentifier> recipients
     ) throws IOException, AttachmentInvalidException, NotAGroupMemberException, GroupNotFoundException, GroupSendingNotAllowedException, UnregisteredRecipientException, InvalidStickerException {
+        final var selfProfile = context.getProfileHelper().getSelfProfile();
+        if (selfProfile == null || selfProfile.getDisplayName().isEmpty()) {
+            logger.warn(
+                    "No profile name set. When sending a message it's recommended to set a profile name wit the updateProfile command. This may become mandatory in the future.");
+        }
         final var messageBuilder = SignalServiceDataMessage.newBuilder();
         applyMessage(messageBuilder, message);
         return sendMessage(messageBuilder, recipients);
@@ -511,7 +563,8 @@ public class ManagerImpl implements Manager {
                             .resolveSignalServiceAddress(context.getRecipientHelper().resolveRecipient(quote.author())),
                     quote.message(),
                     List.of(),
-                    resolveMentions(quote.mentions())));
+                    resolveMentions(quote.mentions()),
+                    SignalServiceDataMessage.Quote.Type.NORMAL));
         }
         if (message.sticker().isPresent()) {
             final var sticker = message.sticker().get();
@@ -519,10 +572,10 @@ public class ManagerImpl implements Manager {
             final var stickerId = sticker.stickerId();
 
             final var stickerPack = context.getAccount().getStickerStore().getStickerPack(packId);
-            if (stickerPack == null || !context.getStickerPackStore().existsStickerPack(packId)) {
+            if (stickerPack == null) {
                 throw new InvalidStickerException("Sticker pack not found");
             }
-            final var manifest = context.getStickerPackStore().retrieveManifest(packId);
+            final var manifest = context.getStickerHelper().getOrRetrieveStickerPack(packId, stickerPack.getPackKey());
             if (manifest.stickers().size() <= stickerId) {
                 throw new InvalidStickerException("Sticker id not part of this pack");
             }
@@ -535,7 +588,7 @@ public class ManagerImpl implements Manager {
                     stickerPack.getPackKey(),
                     stickerId,
                     manifestSticker.emoji(),
-                    AttachmentUtils.createAttachment(streamDetails, Optional.absent())));
+                    AttachmentUtils.createAttachment(streamDetails, Optional.empty())));
         }
     }
 
@@ -545,7 +598,7 @@ public class ManagerImpl implements Manager {
             final var recipientId = context.getRecipientHelper().resolveRecipient(m.recipient());
             mentions.add(new SignalServiceDataMessage.Mention(context.getRecipientHelper()
                     .resolveSignalServiceAddress(recipientId)
-                    .getAci(), m.start(), m.length()));
+                    .getServiceId(), m.start(), m.length()));
         }
         return mentions;
     }
@@ -556,6 +609,17 @@ public class ManagerImpl implements Manager {
     ) throws IOException, NotAGroupMemberException, GroupNotFoundException, GroupSendingNotAllowedException {
         var delete = new SignalServiceDataMessage.RemoteDelete(targetSentTimestamp);
         final var messageBuilder = SignalServiceDataMessage.newBuilder().withRemoteDelete(delete);
+        for (final var recipient : recipients) {
+            if (recipient instanceof RecipientIdentifier.Single r) {
+                try {
+                    final var recipientId = context.getRecipientHelper().resolveRecipient(r);
+                    account.getMessageSendLogStore().deleteEntryForRecipientNonGroup(targetSentTimestamp, recipientId);
+                } catch (UnregisteredRecipientException ignored) {
+                }
+            } else if (recipient instanceof RecipientIdentifier.Group r) {
+                account.getMessageSendLogStore().deleteEntryForGroup(targetSentTimestamp, r.groupId());
+            }
+        }
         return sendMessage(messageBuilder, recipients);
     }
 
@@ -620,25 +684,36 @@ public class ManagerImpl implements Manager {
     }
 
     @Override
-    public void setContactBlocked(
-            RecipientIdentifier.Single recipient, boolean blocked
+    public void setContactsBlocked(
+            Collection<RecipientIdentifier.Single> recipients, boolean blocked
     ) throws NotMasterDeviceException, IOException, UnregisteredRecipientException {
         if (!account.isMasterDevice()) {
             throw new NotMasterDeviceException();
         }
-        context.getContactHelper().setContactBlocked(context.getRecipientHelper().resolveRecipient(recipient), blocked);
+        if (recipients.size() == 0) {
+            return;
+        }
+        final var recipientIds = context.getRecipientHelper().resolveRecipients(recipients);
+        for (final var recipientId : recipientIds) {
+            context.getContactHelper().setContactBlocked(recipientId, blocked);
+        }
         // TODO cycle our profile key, if we're not together in a group with recipient
         context.getSyncHelper().sendBlockedList();
     }
 
     @Override
-    public void setGroupBlocked(
-            final GroupId groupId, final boolean blocked
+    public void setGroupsBlocked(
+            final Collection<GroupId> groupIds, final boolean blocked
     ) throws GroupNotFoundException, NotMasterDeviceException {
         if (!account.isMasterDevice()) {
             throw new NotMasterDeviceException();
         }
-        context.getGroupHelper().setGroupBlocked(groupId, blocked);
+        if (groupIds.size() == 0) {
+            return;
+        }
+        for (final var groupId : groupIds) {
+            context.getGroupHelper().setGroupBlocked(groupId, blocked);
+        }
         // TODO cycle our profile key
         context.getSyncHelper().sendBlockedList();
     }
@@ -658,7 +733,7 @@ public class ManagerImpl implements Manager {
     }
 
     @Override
-    public URI uploadStickerPack(File path) throws IOException, StickerPackInvalidException {
+    public StickerPackUrl uploadStickerPack(File path) throws IOException, StickerPackInvalidException {
         var manifest = StickerUtils.getSignalServiceStickerManifestUpload(path);
 
         var messageSender = dependencies.getMessageSender();
@@ -670,17 +745,7 @@ public class ManagerImpl implements Manager {
         var sticker = new Sticker(packId, packKey);
         account.getStickerStore().updateSticker(sticker);
 
-        try {
-            return new URI("https",
-                    "signal.art",
-                    "/addstickers/",
-                    "pack_id="
-                            + URLEncoder.encode(Hex.toStringCondensed(packId.serialize()), StandardCharsets.UTF_8)
-                            + "&pack_key="
-                            + URLEncoder.encode(Hex.toStringCondensed(packKey), StandardCharsets.UTF_8));
-        } catch (URISyntaxException e) {
-            throw new AssertionError(e);
-        }
+        return new StickerPackUrl(packId, packKey);
     }
 
     @Override
@@ -691,11 +756,11 @@ public class ManagerImpl implements Manager {
                 try {
                     final var manifest = stickerPackStore.retrieveManifest(pack.getPackId());
                     return new StickerPack(pack.getPackId(),
-                            pack.getPackKey(),
+                            new StickerPackUrl(pack.getPackId(), pack.getPackKey()),
                             pack.isInstalled(),
                             manifest.title(),
                             manifest.author(),
-                            java.util.Optional.ofNullable(manifest.cover() == null ? null : manifest.cover().toApi()),
+                            Optional.ofNullable(manifest.cover() == null ? null : manifest.cover().toApi()),
                             manifest.stickers().stream().map(JsonStickerPack.JsonSticker::toApi).toList());
                 } catch (Exception e) {
                     logger.warn("Failed to read local sticker pack manifest: {}", e.getMessage(), e);
@@ -733,30 +798,25 @@ public class ManagerImpl implements Manager {
         }
     }
 
+    private static final AtomicInteger threadNumber = new AtomicInteger(0);
+
     private void startReceiveThreadIfRequired() {
         if (receiveThread != null) {
             return;
         }
         receiveThread = new Thread(() -> {
             logger.debug("Starting receiving messages");
-            while (!Thread.interrupted()) {
-                try {
-                    context.getReceiveHelper().receiveMessages(Duration.ofMinutes(1), false, (envelope, e) -> {
-                        synchronized (messageHandlers) {
-                            Stream.concat(messageHandlers.stream(), weakHandlers.stream()).forEach(h -> {
-                                try {
-                                    h.handleMessage(envelope, e);
-                                } catch (Exception ex) {
-                                    logger.warn("Message handler failed, ignoring", ex);
-                                }
-                            });
+            context.getReceiveHelper().receiveMessagesContinuously((envelope, e) -> {
+                synchronized (messageHandlers) {
+                    Stream.concat(messageHandlers.stream(), weakHandlers.stream()).forEach(h -> {
+                        try {
+                            h.handleMessage(envelope, e);
+                        } catch (Throwable ex) {
+                            logger.warn("Message handler failed, ignoring", ex);
                         }
                     });
-                    break;
-                } catch (IOException e) {
-                    logger.warn("Receiving messages failed, retrying", e);
                 }
-            }
+            });
             logger.debug("Finished receiving messages");
             synchronized (messageHandlers) {
                 receiveThread = null;
@@ -768,6 +828,7 @@ public class ManagerImpl implements Manager {
                 }
             }
         });
+        receiveThread.setName("receive-" + threadNumber.getAndIncrement());
 
         receiveThread.start();
     }
@@ -789,7 +850,10 @@ public class ManagerImpl implements Manager {
     }
 
     private void stopReceiveThread(final Thread thread) {
-        thread.interrupt();
+        if (context.getReceiveHelper().requestStopReceiveMessages()) {
+            logger.debug("Receive stop requested, interrupting read from server.");
+            thread.interrupt();
+        }
         try {
             thread.join();
         } catch (InterruptedException ignored) {
@@ -972,6 +1036,13 @@ public class ManagerImpl implements Manager {
         return updated;
     }
 
+    @Override
+    public void addAddressChangedListener(final Runnable listener) {
+        synchronized (addressChangedListeners) {
+            addressChangedListeners.add(listener);
+        }
+    }
+
     @Override
     public void addClosedListener(final Runnable listener) {
         synchronized (closedListeners) {
@@ -994,15 +1065,17 @@ public class ManagerImpl implements Manager {
         executor.shutdown();
 
         dependencies.getSignalWebSocket().disconnect();
+        disposable.dispose();
+
+        if (account != null) {
+            account.close();
+        }
 
         synchronized (closedListeners) {
             closedListeners.forEach(Runnable::run);
             closedListeners.clear();
         }
 
-        if (account != null) {
-            account.close();
-        }
         account = null;
     }
 }