Don't try to send m.bridge events before portal is created

mautrix_telegram/__main__.py

@@ -14,7 +14,6 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 from typing import Optional
-from itertools import chain
 
 from alchemysession import AlchemySessionContainer
 

mautrix_telegram/portal/metadata.py

@@ -287,6 +287,9 @@ class PortalMetadata(BasePortal, ABC):
         return info
 
     async def update_bridge_info(self) -> None:
+        if not self.mxid:
+            self.log.debug("Not updating bridge info: no Matrix room created")
+            return
         try:
             self.log.debug("Updating bridge info...")
             await self.main_intent.send_state_event(self.mxid, StateBridge,