Exemple #1
0
// 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")
		}
	}

}
Exemple #2
0
// 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)
	}
}