Make StreamIdGen `get_next` and `get_next_mult` async (#8161)

This is mainly so that `StreamIdGenerator` and `MultiWriterIdGenerator`
will have the same interface, allowing them to be used interchangeably.

1 files changed, 1 insertions, 1 deletions

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

index 4e3ec02d14..c9f655dfb7 100644
--- a/synapse/storage/databases/main/presence.py
+++ b/synapse/storage/databases/main/presence.py
@@ -23,7 +23,7 @@ from synapse.util.iterutils import batch_iter
 
 class PresenceStore(SQLBaseStore):
     async def update_presence(self, presence_states):
-        stream_ordering_manager = self._presence_id_gen.get_next_mult(
+        stream_ordering_manager = await self._presence_id_gen.get_next_mult(
             len(presence_states)
         )