// Updates the LastCommitHeight of the validators in valSet, in place.
// Assumes that lastValSet matches the valset of block.LastValidation
// CONTRACT: lastValSet is not mutated.
func updateValidatorsWithBlock(lastValSet *types.ValidatorSet, valSet *types.ValidatorSet, block *types.Block) {
for i, precommit := range block.LastValidation.Precommits {
if precommit == nil {
continue
}
_, val := lastValSet.GetByIndex(i)
if val == nil {
PanicCrisis(Fmt("Failed to fetch validator at index %v", i))
}
if _, val_ := valSet.GetByAddress(val.Address); val_ != nil {
val_.LastCommitHeight = block.Height - 1
updated := valSet.Update(val_)
if !updated {
PanicCrisis("Failed to update validator LastCommitHeight")
}
} else {
// XXX This is not an error if validator was removed.
// But, we don't mutate validators yet so go ahead and panic.
PanicCrisis("Could not find validator")
}
}
}
// Implements Reactor
// NOTE: We process these messages even when we're fast_syncing.
func (conR *ConsensusReactor) Receive(chId byte, peer *p2p.Peer, msgBytes []byte) {
if !conR.IsRunning() {
log.Debug("Receive", "channel", chId, "peer", peer, "bytes", msgBytes)
return
}
// Get round state
rs := conR.conS.GetRoundState()
ps := peer.Data.Get(PeerStateKey).(*PeerState)
_, msg, err := DecodeMessage(msgBytes)
if err != nil {
log.Warn("Error decoding message", "channel", chId, "peer", peer, "msg", msg, "error", err, "bytes", msgBytes)
return
}
log.Debug("Receive", "channel", chId, "peer", peer, "msg", msg, "rsHeight", rs.Height)
switch chId {
case StateChannel:
switch msg := msg.(type) {
case *NewRoundStepMessage:
ps.ApplyNewRoundStepMessage(msg, rs)
case *CommitStepMessage:
ps.ApplyCommitStepMessage(msg)
case *HasVoteMessage:
ps.ApplyHasVoteMessage(msg)
default:
log.Warn(Fmt("Unknown message type %v", reflect.TypeOf(msg)))
}
case DataChannel:
if conR.fastSync {
log.Warn("Ignoring message received during fastSync", "msg", msg)
return
}
switch msg := msg.(type) {
case *ProposalMessage:
ps.SetHasProposal(msg.Proposal)
err = conR.conS.SetProposal(msg.Proposal)
case *ProposalPOLMessage:
ps.ApplyProposalPOLMessage(msg)
case *BlockPartMessage:
ps.SetHasProposalBlockPart(msg.Height, msg.Round, msg.Part.Proof.Index)
_, err = conR.conS.AddProposalBlockPart(msg.Height, msg.Part)
default:
log.Warn(Fmt("Unknown message type %v", reflect.TypeOf(msg)))
}
case VoteChannel:
if conR.fastSync {
log.Warn("Ignoring message received during fastSync", "msg", msg)
return
}
switch msg := msg.(type) {
case *VoteMessage:
vote := msg.Vote
var validators *types.ValidatorSet
if rs.Height == vote.Height {
validators = rs.Validators
} else if rs.Height == vote.Height+1 {
if !(rs.Step == RoundStepNewHeight && vote.Type == types.VoteTypePrecommit) {
return // Wrong height, not a LastCommit straggler commit.
}
validators = rs.LastValidators
} else {
return // Wrong height. Not necessarily a bad peer.
}
// We have vote/validators. Height may not be rs.Height
address, _ := validators.GetByIndex(msg.ValidatorIndex)
added, index, err := conR.conS.AddVote(address, vote, peer.Key)
if err != nil {
// If conflicting sig, broadcast evidence tx for slashing. Else punish peer.
if errDupe, ok := err.(*types.ErrVoteConflictingSignature); ok {
log.Warn("Found conflicting vote. Publish evidence")
evidenceTx := &types.DupeoutTx{
Address: address,
VoteA: *errDupe.VoteA,
VoteB: *errDupe.VoteB,
}
conR.conS.mempoolReactor.BroadcastTx(evidenceTx) // shouldn't need to check returned err
} else {
// Probably an invalid signature. Bad peer.
log.Warn("Error attempting to add vote", "error", err)
// TODO: punish peer
}
}
ps.EnsureVoteBitArrays(rs.Height, rs.Validators.Size())
ps.EnsureVoteBitArrays(rs.Height-1, rs.LastCommit.Size())
ps.SetHasVote(vote, index)
if added {
// If rs.Height == vote.Height && rs.Round < vote.Round,
// the peer is sending us CatchupCommit precommits.
// We could make note of this and help filter in broadcastHasVoteMessage().
conR.broadcastHasVoteMessage(vote, index)
}
default:
log.Warn(Fmt("Unknown message type %v", reflect.TypeOf(msg)))
}
default:
log.Warn(Fmt("Unknown channel %X", chId))
}
if err != nil {
log.Warn("Error in Receive()", "error", err)
}
}