diff --git a/synapse/federation/federation_server.py b/synapse/federation/federation_server.py
index 22b9663831..34bc397e8a 100644
--- a/synapse/federation/federation_server.py
+++ b/synapse/federation/federation_server.py
@@ -305,6 +305,78 @@ class FederationServer(FederationBase):
(200, send_content)
)
+ @defer.inlineCallbacks
+ def get_missing_events(self, origin, room_id, earliest_events,
+ latest_events, limit, min_depth):
+ limit = max(limit, 50)
+ min_depth = max(min_depth, 0)
+
+ missing_events = yield self.store.get_missing_events(
+ room_id=room_id,
+ earliest_events=earliest_events,
+ latest_events=latest_events,
+ limit=limit,
+ min_depth=min_depth,
+ )
+
+ known_ids = {e.event_id for e in missing_events} | {earliest_events}
+
+ back_edges = {
+ e for e in missing_events
+ if {i for i, h in e.prev_events.items()} <= known_ids
+ }
+
+ decoded_auth_events = set()
+ state = {}
+ auth_events = set()
+ auth_and_state = {}
+ for event in back_edges:
+ state_pdus = yield self.handler.get_state_for_pdu(
+ origin, room_id, event.event_id,
+ do_auth=False,
+ )
+
+ state[event.event_id] = [s.event_id for s in state_pdus]
+
+ auth_and_state.update({
+ s.event_id: s for s in state_pdus
+ })
+
+ state_ids = {pdu.event_id for pdu in state_pdus}
+ prev_ids = {i for i, h in event.prev_events.items()}
+ partial_auth_chain = yield self.store.get_auth_chain(
+ state_ids | prev_ids, have_ids=decoded_auth_events.keys()
+ )
+
+ for p in partial_auth_chain:
+ p.signatures.update(
+ compute_event_signature(
+ p,
+ self.hs.hostname,
+ self.hs.config.signing_key[0]
+ )
+ )
+
+ auth_events.update(
+ a.event_id for a in partial_auth_chain
+ )
+
+ auth_and_state.update({
+ a.event_id: a for a in partial_auth_chain
+ })
+
+ time_now = self._clock.time_msec()
+
+ defer.returnValue({
+ "events": [ev.get_pdu_json(time_now) for ev in missing_events],
+ "state_for_events": state,
+ "auth_events": auth_events,
+ "event_map": {
+ k: ev.get_pdu_json(time_now)
+ for k, ev in auth_and_state.items()
+ },
+ })
+
@log_function
def _get_persisted_pdu(self, origin, event_id, do_auth=True):
""" Get a PDU from the database with given origin and id.
|
