Remove Auth.check method (matrix-org#6217)

This method was somewhat redundant, and confusing.

changelog.d/6217.misc

@@ -0,0 +1 @@
+Remove Auth.check method.

synapse/api/auth.py

@@ -84,27 +84,10 @@ def check_from_context(self, room_version, event, context, do_sig_check=True):
         )
         auth_events = yield self.store.get_events(auth_events_ids)
         auth_events = {(e.type, e.state_key): e for e in itervalues(auth_events)}
-        self.check(
+        event_auth.check(
             room_version, event, auth_events=auth_events, do_sig_check=do_sig_check
         )
 
-    def check(self, room_version, event, auth_events, do_sig_check=True):
-        """ Checks if this event is correctly authed.
-
-        Args:
-            room_version (str): version of the room
-            event: the event being checked.
-            auth_events (dict: event-key -> event): the existing room state.
-
-
-        Returns:
-            True if the auth checks pass.
-        """
-        with Measure(self.clock, "auth.check"):
-            event_auth.check(
-                room_version, event, auth_events, do_sig_check=do_sig_check
-            )
-
     @defer.inlineCallbacks
     def check_joined_room(self, room_id, user_id, current_state=None):
         """Check if the user is currently joined in the room

synapse/handlers/federation.py

@@ -30,6 +30,7 @@
 
 from twisted.internet import defer
 
+from synapse import event_auth
 from synapse.api.constants import EventTypes, Membership, RejectedReason
 from synapse.api.errors import (
     AuthError,
@@ -1763,7 +1764,7 @@ def _persist_auth_tree(self, origin, auth_events, state, event):
                 auth_for_e[(EventTypes.Create, "")] = create_event
 
             try:
-                self.auth.check(room_version, e, auth_events=auth_for_e)
+                event_auth.check(room_version, e, auth_events=auth_for_e)
             except SynapseError as err:
                 # we may get SynapseErrors here as well as AuthErrors. For
                 # instance, there are a couple of (ancient) events in some
@@ -1919,7 +1920,7 @@ def _check_for_soft_fail(self, event, state, backfilled):
             }
 
             try:
-                self.auth.check(room_version, event, auth_events=current_auth_events)
+                event_auth.check(room_version, event, auth_events=current_auth_events)
             except AuthError as e:
                 logger.warn("Soft-failing %r because %s", event, e)
                 event.internal_metadata.soft_failed = True
@@ -2018,7 +2019,7 @@ def do_auth(self, origin, event, context, auth_events):
             )
 
         try:
-            self.auth.check(room_version, event, auth_events=auth_events)
+            event_auth.check(room_version, event, auth_events=auth_events)
         except AuthError as e:
             logger.warn("Failed auth resolution for %r because %s", event, e)
             raise e