diff --git a/synapse/handlers/room_member.py b/synapse/handlers/room_member.py
index d550ba8ab4..3dc2b2dd8a 100644
--- a/synapse/handlers/room_member.py
+++ b/synapse/handlers/room_member.py
@@ -25,7 +25,7 @@ from twisted.internet import defer
from synapse import types
from synapse.api.constants import EventTypes, Membership
from synapse.api.errors import AuthError, Codes, SynapseError
-from synapse.types import RoomID, UserID
+from synapse.types import Collection, RoomID, UserID
from synapse.util.async_helpers import Linearizer
from synapse.util.distributor import user_joined_room, user_left_room
@@ -149,7 +149,7 @@ class RoomMemberHandler(object):
target,
room_id,
membership,
- prev_events_and_hashes,
+ prev_event_ids: Collection[str],
txn_id=None,
ratelimit=True,
content=None,
@@ -164,12 +164,6 @@ class RoomMemberHandler(object):
if requester.is_guest:
content["kind"] = "guest"
- prev_event_ids = (
- None
- if prev_events_and_hashes is None
- else [event_id for event_id, _, _ in prev_events_and_hashes]
- )
-
event, context = yield self.event_creation_handler.create_event(
requester,
{
@@ -376,10 +370,7 @@ class RoomMemberHandler(object):
if block_invite:
raise SynapseError(403, "Invites have been disabled on this server")
- prev_events_and_hashes = yield self.store.get_prev_events_and_hashes_for_room(
- room_id
- )
- latest_event_ids = (event_id for (event_id, _, _) in prev_events_and_hashes)
+ latest_event_ids = yield self.store.get_prev_events_for_room(room_id)
current_state_ids = yield self.state_handler.get_current_state_ids(
room_id, latest_event_ids=latest_event_ids
@@ -493,7 +484,7 @@ class RoomMemberHandler(object):
membership=effective_membership_state,
txn_id=txn_id,
ratelimit=ratelimit,
- prev_events_and_hashes=prev_events_and_hashes,
+ prev_event_ids=latest_event_ids,
content=content,
require_consent=require_consent,
)
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