fix(llc): Error while hiding channel and clearing message history.

Signed-off-by: xsahil03x <xdsahil@gmail.com>

packages/stream_chat/CHANGELOG.md

@@ -1,5 +1,10 @@
 ## Upcoming
 
+🐞 Fixed
+
+- [[#1355]](https://github.com/GetStream/stream-chat-flutter/issues/1355) Fixed error while hiding channel and clearing
+  message history.
+
 ✅ Added
 
 - Expose `ChannelMute` class. [#1473](https://github.com/GetStream/stream-chat-flutter/issues/1473)

packages/stream_chat/lib/src/client/channel.dart

@@ -1485,19 +1485,11 @@ class Channel {
   /// will be removed for the user.
   Future<EmptyResponse> hide({bool clearHistory = false}) async {
     _checkInitialized();
-    final response = await _client.hideChannel(
+    return _client.hideChannel(
       id!,
       type,
       clearHistory: clearHistory,
     );
-    if (clearHistory) {
-      state!.truncate();
-      final cid = _cid;
-      if (cid != null) {
-        await _client.chatPersistenceClient?.deleteMessageByCid(cid);
-      }
-    }
-    return response;
   }
 
   /// Removes the hidden status for the channel.

packages/stream_chat/lib/src/client/client.dart

@@ -1567,7 +1567,7 @@ class ClientState {
       _client.on(EventType.channelHidden).listen((event) async {
         final eventChannel = event.channel!;
         await _client.chatPersistenceClient?.deleteChannels([eventChannel.cid]);
-        channels[eventChannel.cid]?.dispose();
+        channels.remove(eventChannel.cid)?.dispose();
       }),
     );
   }
@@ -1606,7 +1606,7 @@ class ClientState {
           .listen((Event event) async {
         final eventChannel = event.channel!;
         await _client.chatPersistenceClient?.deleteChannels([eventChannel.cid]);
-        channels[eventChannel.cid]?.dispose();
+        channels.remove(eventChannel.cid)?.dispose();
       }),
     );
   }
@@ -1713,9 +1713,9 @@ class ClientState {
     _unreadChannelsController.close();
     _totalUnreadCountController.close();
 
-    final channels = this.channels.values.toList();
+    final channels = this.channels.keys;
     for (final channel in channels) {
-      channel.dispose();
+      this.channels.remove(channel)?.dispose();
     }
     _channelsController.close();
   }