Add some type hints to datastore (#12485)

1 files changed, 2 insertions, 2 deletions

diff --git a/synapse/storage/databases/main/state.py b/synapse/storage/databases/main/state.py

index e653841fe5..5e340bd03d 100644
--- a/synapse/storage/databases/main/state.py
+++ b/synapse/storage/databases/main/state.py
@@ -370,10 +370,10 @@ class StateGroupWorkerStore(EventsWorkerStore, SQLBaseStore):
 
     def _update_state_for_partial_state_event_txn(
         self,
-        txn,
+        txn: LoggingTransaction,
         event: EventBase,
         context: EventContext,
-    ):
+    ) -> None:
         # we shouldn't have any outliers here
         assert not event.internal_metadata.is_outlier()