add '_is_valid_uuid()' to '_resolve_receiver()' for users without number

signalbot/bot.py

@@ -6,6 +6,7 @@
 import traceback
 from typing import Optional, Union, List, Callable
 import re
+import uuid
 
 from .api import SignalAPI, ReceiveMessagesError
 from .command import Command
@@ -240,6 +241,9 @@ def _resolve_receiver(self, receiver: str) -> str:
         if self._is_phone_number(receiver):
             return receiver
 
+        if self._is_valid_uuid(receiver):
+            return receiver
+
         if self._is_group_id(receiver):
             return receiver
 
@@ -259,6 +263,13 @@ def _is_phone_number(self, phone_number: str) -> bool:
             return False
         return True
 
+    def _is_valid_uuid(self, receiver_uuid: str):
+        try:
+            uuid.UUID(str(receiver_uuid))
+            return True
+        except ValueError:
+            return False
+
     def _is_group_id(self, group_id: str) -> bool:
         """Check if group_id has the right format, e.g.