Add type hints to `synapse/storage/databases/main/events_worker.py` (#11411)

Also refactor the stream ID trackers/generators a bit and try to
document them better.

1 files changed, 3 insertions, 3 deletions

diff --git a/synapse/replication/tcp/streams/events.py b/synapse/replication/tcp/streams/events.py
index a030e9299e..a390cfcb74 100644
--- a/synapse/replication/tcp/streams/events.py
+++ b/synapse/replication/tcp/streams/events.py
@@ -14,7 +14,7 @@
 # limitations under the License.
 import heapq
 from collections.abc import Iterable
-from typing import TYPE_CHECKING, List, Optional, Tuple, Type
+from typing import TYPE_CHECKING, Optional, Tuple, Type
 
 import attr
 
@@ -157,7 +157,7 @@ class EventsStream(Stream):
 
         # now we fetch up to that many rows from the events table
 
-        event_rows: List[Tuple] = await self._store.get_all_new_forward_event_rows(
+        event_rows = await self._store.get_all_new_forward_event_rows(
             instance_name, from_token, current_token, target_row_count
         )
 
@@ -191,7 +191,7 @@ class EventsStream(Stream):
         # finally, fetch the ex-outliers rows. We assume there are few enough of these
         # not to bother with the limit.
 
-        ex_outliers_rows: List[Tuple] = await self._store.get_ex_outlier_stream_rows(
+        ex_outliers_rows = await self._store.get_ex_outlier_stream_rows(
             instance_name, from_token, upper_limit
         )