Add type hints to more handlers

synapse/handlers/events.py

@@ -149,7 +149,9 @@ def __init__(self, hs: "HomeServer"):
         super(EventHandler, self).__init__(hs)
         self.storage = hs.get_storage()
 
-    async def get_event(self, user: UserID, room_id: Optional[str], event_id: str):
+    async def get_event(
+        self, user: UserID, room_id: Optional[str], event_id: str
+    ) -> Optional[EventBase]:
         """Retrieve a single specified event.
 
         Args:

synapse/handlers/pagination.py

@@ -106,18 +106,20 @@ def __init__(self, hs: "HomeServer"):
                     job["longest_max_lifetime"],
                 )
 
-    async def purge_history_for_rooms_in_range(self, min_ms: int, max_ms: int):
+    async def purge_history_for_rooms_in_range(
+        self, min_ms: Optional[int], max_ms: Optional[int]
+    ):
         """Purge outdated events from rooms within the given retention range.
 
         If a default retention policy is defined in the server's configuration and its
         'max_lifetime' is within this range, also targets rooms which don't have a
         retention policy.
 
         Args:
-            min_ms (int|None): Duration in milliseconds that define the lower limit of
+            min_ms: Duration in milliseconds that define the lower limit of
                 the range to handle (exclusive). If None, it means that the range has no
                 lower limit.
-            max_ms (int|None): Duration in milliseconds that define the upper limit of
+            max_ms: Duration in milliseconds that define the upper limit of
                 the range to handle (inclusive). If None, it means that the range has no
                 upper limit.
         """