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Limit prev_events and auth_events

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This commit is contained in:
Neil Alexander 2020-04-01 10:30:47 +01:00
parent b4c84be802
commit 942b2db448
1 changed files with 15 additions and 0 deletions
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15
common/events.go
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@ -105,17 +105,32 @@ func AddPrevEventsToEvent(
return err
}
// The limits here feel a bit arbitrary but they are currently here
// because of https://github.com/matrix-org/matrix-doc/issues/2307
// and because Synapse will just drop events that don't comply.
switch eventFormat {
case gomatrixserverlib.EventFormatV1:
builder.AuthEvents = refs
builder.PrevEvents = queryRes.LatestEvents
if len(builder.AuthEvents) > 10 {
builder.AuthEvents = builder.AuthEvents[:10]
}
if len(builder.PrevEvents) > 20 {
builder.PrevEvents = builder.PrevEvents[:20]
}
case gomatrixserverlib.EventFormatV2:
v2AuthRefs := []string{}
v2PrevRefs := []string{}
for _, ref := range refs {
if len(v2AuthRefs) == 10 {
break
}
v2AuthRefs = append(v2AuthRefs, ref.EventID)
}
for _, ref := range queryRes.LatestEvents {
if len(v2PrevRefs) == 20 {
break
}
v2PrevRefs = append(v2PrevRefs, ref.EventID)
}
builder.AuthEvents = v2AuthRefs