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MatrixSynapse/changelog.d/13815.feature

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Track when the pulled event signature fails (#13815) Because we're doing the recording in `_check_sigs_and_hash_for_pulled_events_and_fetch` (previously named `_check_sigs_and_hash_and_fetch`), this means we will track signature failures for `backfill`, `get_room_state`, `get_event_auth`, and `get_missing_events` (all pulled event scenarios). And we also record signature failures from `get_pdu`. Part of https://github.com/matrix-org/synapse/issues/13700 Part of https://github.com/matrix-org/synapse/issues/13676 and https://github.com/matrix-org/synapse/issues/13356 This PR will be especially important for https://github.com/matrix-org/synapse/pull/13816 so we can avoid the costly `_get_state_ids_after_missing_prev_event` down the line when `/messages` calls backfill.
2022-10-03 21:53:29 +02:00
Keep track when an event pulled over federation fails its signature check so we can intelligently back-off in the future.