fix(community): fix editing a community channel loses the members

protocol/communities/community.go

@@ -621,6 +621,15 @@ func (o *Community) GetMember(pk *ecdsa.PublicKey) *protobuf.CommunityMember {
 	return o.getMember(pk)
 }
 
+func (o *Community) GetChat(chatID string) (*protobuf.CommunityChat, error) {
+	chat, ok := o.config.CommunityDescription.Chats[chatID]
+	if !ok {
+		return nil, ErrChatNotFound
+	}
+
+	return chat, nil
+}
+
 func (o *Community) getChatMember(pk *ecdsa.PublicKey, chatID string) *protobuf.CommunityMember {
 	if !o.hasMember(pk) {
 		return nil

protocol/communities/manager.go

@@ -1469,6 +1469,15 @@ func (m *Manager) EditChat(communityID types.HexBytes, chatID string, chat *prot
 		chatID = strings.TrimPrefix(chatID, communityID.String())
 	}
 
+	oldChat, err := community.GetChat(chatID)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	// We can't edit permissions and members with an Edit, so we set to what we had, otherwise they will be lost
+	chat.Permissions = oldChat.Permissions
+	chat.Members = oldChat.Members
+
 	changes, err := community.EditChat(chatID, chat)
 	if err != nil {
 		return nil, nil, err