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Clamp min depth to 0

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This commit is contained in:
Kegan Dougal 2020-05-12 14:49:21 +01:00
parent 21f8842395
commit bc1d8772dc
1 changed files with 5 additions and 1 deletions
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6
federationapi/routing/send.go
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@ -561,10 +561,14 @@ func (t *txnReq) getMissingEvents(e gomatrixserverlib.Event, roomVersion gomatri
latestEvents[i] = res.LatestEvents[i].EventID
}
// this server just sent us an event for which we do not know its prev_events - ask that server for those prev_events.
minDepth := int(res.Depth) - 20
if minDepth < 0 {
minDepth = 0
}
missingResp, err := t.federation.LookupMissingEvents(t.context, t.Origin, e.RoomID(), gomatrixserverlib.MissingEvents{
Limit: 20,
// synapse uses the min depth they've ever seen in that room
MinDepth: int(res.Depth) - 20,
MinDepth: minDepth,
// The latest event IDs that the sender already has. These are skipped when retrieving the previous events of latest_events.
EarliestEvents: latestEvents,
// The event IDs to retrieve the previous events for.