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@@ -34,6 +34,8 @@ from synapse.api.errors import SynapseError
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from synapse.events import EventBase # noqa: F401
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from synapse.events.snapshot import EventContext # noqa: F401
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from synapse.metrics.background_process_metrics import run_as_background_process
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+from synapse.storage.background_updates import BackgroundUpdateStore
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+from synapse.storage.event_federation import EventFederationStore
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from synapse.storage.events_worker import EventsWorkerStore
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from synapse.types import RoomStreamToken, get_domain_from_id
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from synapse.util.async import ObservableDeferred
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@@ -193,7 +195,9 @@ def _retry_on_integrity_error(func):
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return f
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-class EventsStore(EventsWorkerStore):
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+# inherits from EventFederationStore so that we can call _update_backward_extremities
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+# and _handle_mult_prev_events (though arguably those could both be moved in here)
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+class EventsStore(EventFederationStore, EventsWorkerStore, BackgroundUpdateStore):
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EVENT_ORIGIN_SERVER_TS_NAME = "event_origin_server_ts"
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EVENT_FIELDS_SENDER_URL_UPDATE_NAME = "event_fields_sender_url"
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