diff --git a/synapse/federation/federation_client.py b/synapse/federation/federation_client.py
index 4870e39652..b5538bc07a 100644
--- a/synapse/federation/federation_client.py
+++ b/synapse/federation/federation_client.py
@@ -187,7 +187,7 @@ class FederationClient(FederationBase):
async def backfill(
self, dest: str, room_id: str, limit: int, extremities: Iterable[str]
- ) -> List[EventBase]:
+ ) -> Optional[List[EventBase]]:
"""Requests some more historic PDUs for the given room from the
given destination server.
@@ -199,9 +199,9 @@ class FederationClient(FederationBase):
"""
logger.debug("backfill extrem=%s", extremities)
- # If there are no extremeties then we've (probably) reached the start.
+ # If there are no extremities then we've (probably) reached the start.
if not extremities:
- return
+ return None
transaction_data = await self.transport_layer.backfill(
dest, room_id, extremities, limit
@@ -284,7 +284,7 @@ class FederationClient(FederationBase):
pdu_list = [
event_from_pdu_json(p, room_version, outlier=outlier)
for p in transaction_data["pdus"]
- ]
+ ] # type: List[EventBase]
if pdu_list and pdu_list[0]:
pdu = pdu_list[0]
@@ -615,7 +615,7 @@ class FederationClient(FederationBase):
]
if auth_chain_create_events != [create_event.event_id]:
raise InvalidResponseError(
- "Unexpected create event(s) in auth chain"
+ "Unexpected create event(s) in auth chain: %s"
% (auth_chain_create_events,)
)
|
