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-rw-r--r--synapse/storage/databases/main/events.py7
-rw-r--r--synapse/storage/databases/main/roommember.py8
2 files changed, 9 insertions, 6 deletions
diff --git a/synapse/storage/databases/main/events.py b/synapse/storage/databases/main/events.py
index 8d9086ecf0..596275c23c 100644
--- a/synapse/storage/databases/main/events.py
+++ b/synapse/storage/databases/main/events.py
@@ -24,6 +24,7 @@ from typing import (
     Iterable,
     List,
     Optional,
+    Sequence,
     Set,
     Tuple,
 )
@@ -494,7 +495,7 @@ class PersistEventsStore:
         event_chain_id_gen: SequenceGenerator,
         event_to_room_id: Dict[str, str],
         event_to_types: Dict[str, Tuple[str, str]],
-        event_to_auth_chain: Dict[str, List[str]],
+        event_to_auth_chain: Dict[str, Sequence[str]],
     ) -> None:
         """Calculate the chain cover index for the given events.
 
@@ -786,7 +787,7 @@ class PersistEventsStore:
         event_chain_id_gen: SequenceGenerator,
         event_to_room_id: Dict[str, str],
         event_to_types: Dict[str, Tuple[str, str]],
-        event_to_auth_chain: Dict[str, List[str]],
+        event_to_auth_chain: Dict[str, Sequence[str]],
         events_to_calc_chain_id_for: Set[str],
         chain_map: Dict[str, Tuple[int, int]],
     ) -> Dict[str, Tuple[int, int]]:
@@ -1794,7 +1795,7 @@ class PersistEventsStore:
         )
 
         # Insert an edge for every prev_event connection
-        for prev_event_id in event.prev_events:
+        for prev_event_id in event.prev_event_ids():
             self.db_pool.simple_insert_txn(
                 txn,
                 table="insertion_event_edges",
diff --git a/synapse/storage/databases/main/roommember.py b/synapse/storage/databases/main/roommember.py
index 4b288bb2e7..033a9831d6 100644
--- a/synapse/storage/databases/main/roommember.py
+++ b/synapse/storage/databases/main/roommember.py
@@ -570,7 +570,7 @@ class RoomMemberWorkerStore(EventsWorkerStore):
 
     async def get_joined_users_from_context(
         self, event: EventBase, context: EventContext
-    ):
+    ) -> Dict[str, ProfileInfo]:
         state_group = context.state_group
         if not state_group:
             # If state_group is None it means it has yet to be assigned a
@@ -584,7 +584,9 @@ class RoomMemberWorkerStore(EventsWorkerStore):
             event.room_id, state_group, current_state_ids, event=event, context=context
         )
 
-    async def get_joined_users_from_state(self, room_id, state_entry):
+    async def get_joined_users_from_state(
+        self, room_id, state_entry
+    ) -> Dict[str, ProfileInfo]:
         state_group = state_entry.state_group
         if not state_group:
             # If state_group is None it means it has yet to be assigned a
@@ -607,7 +609,7 @@ class RoomMemberWorkerStore(EventsWorkerStore):
         cache_context,
         event=None,
         context=None,
-    ):
+    ) -> Dict[str, ProfileInfo]:
         # We don't use `state_group`, it's there so that we can cache based
         # on it. However, it's important that it's never None, since two current_states
         # with a state_group of None are likely to be different.