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checkSendEvidenceMessage

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This commit is contained in:
Ethan Buchman 2018-06-04 21:50:42 -07:00
parent 566024b64f
commit 1b2e34738a
1 changed files with 37 additions and 22 deletions
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61
evidence/reactor.go
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@ -130,30 +130,13 @@ func (evR *EvidenceReactor) broadcastEvidenceRoutine(peer p2p.Peer) {
}
ev := next.Value.(types.Evidence)
// make sure the peer is up to date
height := ev.Height()
peerState, ok := peer.Get(types.PeerStateKey).(PeerState)
if !ok {
evR.Logger.Info("Found peer without PeerState", "peer", peer)
time.Sleep(peerCatchupSleepIntervalMS * time.Millisecond)
continue
}
// NOTE: We only send evidence to peers where
// peerHeight - maxAge < evidenceHeight < peerHeight
maxAge := evR.evpool.State().ConsensusParams.EvidenceParams.MaxAge
peerHeight := peerState.GetHeight()
if peerHeight < height ||
peerHeight > height+maxAge {
time.Sleep(peerCatchupSleepIntervalMS * time.Millisecond)
continue
}
// send evidence
msg := &EvidenceListMessage{[]types.Evidence{ev}}
msg, retry := evR.checkSendEvidenceMessage(peer, ev)
if msg != nil {
success := peer.Send(EvidenceChannel, cdc.MustMarshalBinaryBare(msg))
if !success {
retry = !success
}
if retry {
time.Sleep(peerCatchupSleepIntervalMS * time.Millisecond)
continue
}
@ -175,6 +158,38 @@ func (evR *EvidenceReactor) broadcastEvidenceRoutine(peer p2p.Peer) {
}
}
// Returns the message to send the peer, or nil if the evidence is invalid for the peer.
// If message is nil, return true if we should sleep and try again.
func (evR EvidenceReactor) checkSendEvidenceMessage(peer p2p.Peer, ev types.Evidence) (msg EvidenceMessage, retry bool) {
// make sure the peer is up to date
evHeight := ev.Height()
peerState, ok := peer.Get(types.PeerStateKey).(PeerState)
if !ok {
evR.Logger.Info("Found peer without PeerState", "peer", peer)
return nil, true
}
// NOTE: We only send evidence to peers where
// peerHeight - maxAge < evidenceHeight < peerHeight
maxAge := evR.evpool.State().ConsensusParams.EvidenceParams.MaxAge
peerHeight := peerState.GetHeight()
if peerHeight < evHeight {
// peer is behind. sleep while he catches up
return nil, true
} else if peerHeight > evHeight+maxAge {
// evidence is too old, skip
// NOTE: if evidence is too old for an honest peer,
// then we're behind and either it already got committed or it never will!
evR.Logger.Info("Not sending peer old evidence", "peerHeight", peerHeight, "evHeight", evHeight, "maxAge", maxAge, "peer", peer)
return nil, false
}
// send evidence
msg = &EvidenceListMessage{[]types.Evidence{ev}}
return msg, false
}
// PeerState describes the state of a peer.
type PeerState interface {
GetHeight() int64