Add m.room.history_visibility to list of auth events

synapse/api/auth.py

@@ -29,7 +29,7 @@ logger = logging.getLogger(__name__)
 
 AuthEventTypes = (
     EventTypes.Create, EventTypes.Member, EventTypes.PowerLevels,
-    EventTypes.JoinRules,
+    EventTypes.JoinRules, EventTypes.RoomHistoryVisibility,
 )
 
 

synapse/events/utils.py

@@ -74,6 +74,8 @@ def prune_event(event):
         )
     elif event_type == EventTypes.Aliases:
         add_fields("aliases")
+    elif event_type == EventTypes.RoomHistoryVisibility:
+        add_fields("visibility")
 
     allowed_fields = {
         k: v