func (conR *ConsensusReactor) sendNewRoundStep(peer *p2p.Peer) {
	rs := conR.conS.GetRoundState()
	nrsMsg, csMsg := makeRoundStepMessages(rs)
	if nrsMsg != nil {
		peer.Send(StateChannel, nrsMsg)
	}
	if csMsg != nil {
		peer.Send(StateChannel, csMsg)
	}
}

// Implements Reactor
func (bcR *BlockchainReactor) Receive(chId byte, src *p2p.Peer, msgBytes []byte) {
	_, msg, err := DecodeMessage(msgBytes)
	if err != nil {
		log.Warn("Error decoding message", "error", err)
		return
	}

	log.Info("Received message", "msg", msg)

	switch msg := msg.(type) {
	case *bcBlockRequestMessage:
		// Got a request for a block. Respond with block if we have it.
		block := bcR.store.LoadBlock(msg.Height)
		if block != nil {
			msg := &bcBlockResponseMessage{Block: block}
			queued := src.TrySend(BlockchainChannel, msg)
			if !queued {
				// queue is full, just ignore.
			}
		} else {
			// TODO peer is asking for things we don't have.
		}
	case *bcBlockResponseMessage:
		// Got a block.
		bcR.pool.AddBlock(msg.Block, src.Key)
	case *bcStatusRequestMessage:
		// Send peer our state.
		queued := src.TrySend(BlockchainChannel, &bcStatusResponseMessage{bcR.store.Height()})
		if !queued {
			// sorry
		}
	case *bcStatusResponseMessage:
		// Got a peer status. Unverified.
		bcR.pool.SetPeerHeight(src.Key, msg.Height)
	default:
		log.Warn(Fmt("Unknown message type %v", reflect.TypeOf(msg)))
	}
}

// Implements Reactor
func (bcR *BlockchainReactor) AddPeer(peer *p2p.Peer) {
	// Send peer our state.
	peer.Send(BlockchainChannel, &bcStatusResponseMessage{bcR.store.Height()})
}

func (conR *ConsensusReactor) gossipVotesRoutine(peer *p2p.Peer, ps *PeerState) {

	// Simple hack to throttle logs upon sleep.
	var sleeping = 0

OUTER_LOOP:
	for {
		// Manage disconnects from self or peer.
		if !peer.IsRunning() || !conR.IsRunning() {
			log.Info(Fmt("Stopping gossipVotesRoutine for %v.", peer))
			return
		}
		rs := conR.conS.GetRoundState()
		prs := ps.GetRoundState()

		switch sleeping {
		case 1: // First sleep
			sleeping = 2
		case 2: // No more sleep
			sleeping = 0
		}

		// Returns true when useful work was done.
		trySendVote := func(height uint, voteSet *VoteSet, peerVoteSet *BitArray) (sent bool) {
			if voteSet == nil {
				return false
			} else if peerVoteSet == nil {
				ps.EnsureVoteBitArrays(height, voteSet.Size())
				return true
			}
			// TODO: give priority to our vote.
			if index, ok := voteSet.BitArray().Sub(peerVoteSet.Copy()).PickRandom(); ok {
				vote := voteSet.GetByIndex(index)
				// NOTE: vote may be a commit.
				msg := &VoteMessage{index, vote}
				peer.Send(VoteChannel, msg)
				ps.SetHasVote(vote, index)
				return true
			}
			return false
		}

		// Returns true when useful work was done.
		trySendCommitFromValidation := func(blockMeta *types.BlockMeta, validation *types.Validation, peerVoteSet *BitArray) (sent bool) {
			if validation == nil {
				return false
			} else if peerVoteSet == nil {
				ps.EnsureVoteBitArrays(blockMeta.Header.Height, uint(len(validation.Commits)))
				return true
			}
			if index, ok := validation.BitArray().Sub(prs.Commits.Copy()).PickRandom(); ok {
				commit := validation.Commits[index]
				log.Debug("Picked commit to send", "index", index, "commit", commit)
				// Reconstruct vote.
				vote := &types.Vote{
					Height:     prs.Height,
					Round:      commit.Round,
					Type:       types.VoteTypeCommit,
					BlockHash:  blockMeta.Hash,
					BlockParts: blockMeta.Parts,
					Signature:  commit.Signature,
				}
				msg := &VoteMessage{index, vote}
				peer.Send(VoteChannel, msg)
				ps.SetHasVote(vote, index)
				return true
			}
			return false
		}

		// If height matches, then send LastCommits, Prevotes, Precommits, or Commits.
		if rs.Height == prs.Height {

			// If there are lastcommits to send...
			if prs.Round == 0 && prs.Step == RoundStepNewHeight {
				if trySendVote(rs.Height-1, rs.LastCommits, prs.LastCommits) {
					continue OUTER_LOOP
				}
			}

			// If there are prevotes to send...
			if rs.Round == prs.Round && prs.Step <= RoundStepPrevote {
				if trySendVote(rs.Height, rs.Prevotes, prs.Prevotes) {
					continue OUTER_LOOP
				}
			}

			// If there are precommits to send...
			if rs.Round == prs.Round && prs.Step <= RoundStepPrecommit {
				if trySendVote(rs.Height, rs.Precommits, prs.Precommits) {
					continue OUTER_LOOP
				}
			}

			// If there are any commits to send...
			if trySendVote(rs.Height, rs.Commits, prs.Commits) {
				continue OUTER_LOOP
			}
		}

//.........这里部分代码省略.........

func (conR *ConsensusReactor) gossipDataRoutine(peer *p2p.Peer, ps *PeerState) {

OUTER_LOOP:
	for {
		// Manage disconnects from self or peer.
		if !peer.IsRunning() || !conR.IsRunning() {
			log.Info(Fmt("Stopping gossipDataRoutine for %v.", peer))
			return
		}
		rs := conR.conS.GetRoundState()
		prs := ps.GetRoundState()

		// Send proposal Block parts?
		// NOTE: if we or peer is at RoundStepCommit*, the round
		// won't necessarily match, but that's OK.
		if rs.ProposalBlockParts.HasHeader(prs.ProposalBlockParts) {
			//log.Debug("ProposalBlockParts matched", "blockParts", prs.ProposalBlockParts)
			if index, ok := rs.ProposalBlockParts.BitArray().Sub(prs.ProposalBlockBitArray.Copy()).PickRandom(); ok {
				part := rs.ProposalBlockParts.GetPart(index)
				msg := &PartMessage{
					Height: rs.Height,
					Round:  rs.Round,
					Type:   partTypeProposalBlock,
					Part:   part,
				}
				peer.Send(DataChannel, msg)
				ps.SetHasProposalBlockPart(rs.Height, rs.Round, index)
				continue OUTER_LOOP
			}
		}

		// If the peer is on a previous height, help catch up.
		if 0 < prs.Height && prs.Height < rs.Height {
			//log.Debug("Data catchup", "height", rs.Height, "peerHeight", prs.Height, "peerProposalBlockBitArray", prs.ProposalBlockBitArray)
			if index, ok := prs.ProposalBlockBitArray.Not().PickRandom(); ok {
				// Ensure that the peer's PartSetHeader is correct
				blockMeta := conR.blockStore.LoadBlockMeta(prs.Height)
				if !blockMeta.Parts.Equals(prs.ProposalBlockParts) {
					log.Debug("Peer ProposalBlockParts mismatch, sleeping",
						"peerHeight", prs.Height, "blockParts", blockMeta.Parts, "peerBlockParts", prs.ProposalBlockParts)
					time.Sleep(peerGossipSleepDuration)
					continue OUTER_LOOP
				}
				// Load the part
				part := conR.blockStore.LoadBlockPart(prs.Height, index)
				if part == nil {
					log.Warn("Could not load part", "index", index,
						"peerHeight", prs.Height, "blockParts", blockMeta.Parts, "peerBlockParts", prs.ProposalBlockParts)
					time.Sleep(peerGossipSleepDuration)
					continue OUTER_LOOP
				}
				// Send the part
				msg := &PartMessage{
					Height: prs.Height,
					Round:  prs.Round,
					Type:   partTypeProposalBlock,
					Part:   part,
				}
				peer.Send(DataChannel, msg)
				ps.SetHasProposalBlockPart(prs.Height, prs.Round, index)
				continue OUTER_LOOP
			} else {
				//log.Debug("No parts to send in catch-up, sleeping")
				time.Sleep(peerGossipSleepDuration)
				continue OUTER_LOOP
			}
		}

		// If height and round don't match, sleep.
		if rs.Height != prs.Height || rs.Round != prs.Round {
			//log.Debug("Peer Height|Round mismatch, sleeping", "peerHeight", prs.Height, "peerRound", prs.Round, "peer", peer)
			time.Sleep(peerGossipSleepDuration)
			continue OUTER_LOOP
		}

		// Send proposal?
		if rs.Proposal != nil && !prs.Proposal {
			msg := &ProposalMessage{Proposal: rs.Proposal}
			peer.Send(DataChannel, msg)
			ps.SetHasProposal(rs.Proposal)
			continue OUTER_LOOP
		}

		// Send proposal POL parts?
		if rs.ProposalPOLParts.HasHeader(prs.ProposalPOLParts) {
			if index, ok := rs.ProposalPOLParts.BitArray().Sub(prs.ProposalPOLBitArray.Copy()).PickRandom(); ok {
				msg := &PartMessage{
					Height: rs.Height,
					Round:  rs.Round,
					Type:   partTypeProposalPOL,
					Part:   rs.ProposalPOLParts.GetPart(index),
				}
				peer.Send(DataChannel, msg)
				ps.SetHasProposalPOLPart(rs.Height, rs.Round, index)
				continue OUTER_LOOP
			}
		}

		// Nothing to do. Sleep.
		time.Sleep(peerGossipSleepDuration)
//.........这里部分代码省略.........

func (conR *ConsensusReactor) gossipVotesRoutine(peer *p2p.Peer, ps *PeerState) {
	log := log.New("peer", peer.Key)

	// Simple hack to throttle logs upon sleep.
	var sleeping = 0

OUTER_LOOP:
	for {
		// Manage disconnects from self or peer.
		if !peer.IsRunning() || !conR.IsRunning() {
			log.Notice(Fmt("Stopping gossipVotesRoutine for %v.", peer))
			return
		}
		rs := conR.conS.GetRoundState()
		prs := ps.GetRoundState()

		switch sleeping {
		case 1: // First sleep
			sleeping = 2
		case 2: // No more sleep
			sleeping = 0
		}

		log.Debug("gossipVotesRoutine", "rsHeight", rs.Height, "rsRound", rs.Round,
			"prsHeight", prs.Height, "prsRound", prs.Round, "prsStep", prs.Step)

		// If height matches, then send LastCommit, Prevotes, Precommits.
		if rs.Height == prs.Height {
			// If there are lastCommits to send...
			if prs.Step == RoundStepNewHeight {
				if ps.PickSendVote(rs.LastCommit) {
					log.Info("Picked rs.LastCommit to send")
					continue OUTER_LOOP
				}
			}
			// If there are prevotes to send...
			if rs.Round == prs.Round && prs.Step <= RoundStepPrevote {
				if ps.PickSendVote(rs.Votes.Prevotes(rs.Round)) {
					log.Info("Picked rs.Prevotes(rs.Round) to send")
					continue OUTER_LOOP
				}
			}
			// If there are precommits to send...
			if rs.Round == prs.Round && prs.Step <= RoundStepPrecommit {
				if ps.PickSendVote(rs.Votes.Precommits(rs.Round)) {
					log.Info("Picked rs.Precommits(rs.Round) to send")
					continue OUTER_LOOP
				}
			}
			// If there are prevotes to send for the last round...
			if rs.Round == prs.Round+1 && prs.Step <= RoundStepPrevote {
				if ps.PickSendVote(rs.Votes.Prevotes(prs.Round)) {
					log.Info("Picked rs.Prevotes(prs.Round) to send")
					continue OUTER_LOOP
				}
			}
			// If there are precommits to send for the last round...
			if rs.Round == prs.Round+1 && prs.Step <= RoundStepPrecommit {
				if ps.PickSendVote(rs.Votes.Precommits(prs.Round)) {
					log.Info("Picked rs.Precommits(prs.Round) to send")
					continue OUTER_LOOP
				}
			}
			// If there are POLPrevotes to send...
			if 0 <= prs.ProposalPOLRound {
				if polPrevotes := rs.Votes.Prevotes(prs.ProposalPOLRound); polPrevotes != nil {
					if ps.PickSendVote(polPrevotes) {
						log.Info("Picked rs.Prevotes(prs.ProposalPOLRound) to send")
						continue OUTER_LOOP
					}
				}
			}
		}

		// Special catchup logic.
		// If peer is lagging by height 1, send LastCommit.
		if prs.Height != 0 && rs.Height == prs.Height+1 {
			if ps.PickSendVote(rs.LastCommit) {
				log.Info("Picked rs.LastCommit to send")
				continue OUTER_LOOP
			}
		}

		// Catchup logic
		// If peer is lagging by more than 1, send Validation.
		if prs.Height != 0 && rs.Height >= prs.Height+2 {
			// Load the block validation for prs.Height,
			// which contains precommit signatures for prs.Height.
			validation := conR.blockStore.LoadBlockValidation(prs.Height)
			log.Info("Loaded BlockValidation for catch-up", "height", prs.Height, "validation", validation)
			if ps.PickSendVote(validation) {
				log.Info("Picked Catchup validation to send")
				continue OUTER_LOOP
			}
		}

		if sleeping == 0 {
			// We sent nothing. Sleep...
			sleeping = 1
			log.Info("No votes to send, sleeping", "peer", peer,
//.........这里部分代码省略.........

func (conR *ConsensusReactor) gossipDataRoutine(peer *p2p.Peer, ps *PeerState) {
	log := log.New("peer", peer.Key)

OUTER_LOOP:
	for {
		// Manage disconnects from self or peer.
		if !peer.IsRunning() || !conR.IsRunning() {
			log.Notice(Fmt("Stopping gossipDataRoutine for %v.", peer))
			return
		}
		rs := conR.conS.GetRoundState()
		prs := ps.GetRoundState()

		// Send proposal Block parts?
		if rs.ProposalBlockParts.HasHeader(prs.ProposalBlockPartsHeader) {
			//log.Info("ProposalBlockParts matched", "blockParts", prs.ProposalBlockParts)
			if index, ok := rs.ProposalBlockParts.BitArray().Sub(prs.ProposalBlockParts.Copy()).PickRandom(); ok {
				part := rs.ProposalBlockParts.GetPart(index)
				msg := &BlockPartMessage{
					Height: rs.Height, // This tells peer that this part applies to us.
					Round:  rs.Round,  // This tells peer that this part applies to us.
					Part:   part,
				}
				peer.Send(DataChannel, msg)
				ps.SetHasProposalBlockPart(prs.Height, prs.Round, index)
				continue OUTER_LOOP
			}
		}

		// If the peer is on a previous height, help catch up.
		if (0 < prs.Height) && (prs.Height < rs.Height) {
			//log.Info("Data catchup", "height", rs.Height, "peerHeight", prs.Height, "peerProposalBlockParts", prs.ProposalBlockParts)
			if index, ok := prs.ProposalBlockParts.Not().PickRandom(); ok {
				// Ensure that the peer's PartSetHeader is correct
				blockMeta := conR.blockStore.LoadBlockMeta(prs.Height)
				if !blockMeta.PartsHeader.Equals(prs.ProposalBlockPartsHeader) {
					log.Info("Peer ProposalBlockPartsHeader mismatch, sleeping",
						"peerHeight", prs.Height, "blockPartsHeader", blockMeta.PartsHeader, "peerBlockPartsHeader", prs.ProposalBlockPartsHeader)
					time.Sleep(peerGossipSleepDuration)
					continue OUTER_LOOP
				}
				// Load the part
				part := conR.blockStore.LoadBlockPart(prs.Height, index)
				if part == nil {
					log.Warn("Could not load part", "index", index,
						"peerHeight", prs.Height, "blockPartsHeader", blockMeta.PartsHeader, "peerBlockPartsHeader", prs.ProposalBlockPartsHeader)
					time.Sleep(peerGossipSleepDuration)
					continue OUTER_LOOP
				}
				// Send the part
				msg := &BlockPartMessage{
					Height: prs.Height, // Not our height, so it doesn't matter.
					Round:  prs.Round,  // Not our height, so it doesn't matter.
					Part:   part,
				}
				peer.Send(DataChannel, msg)
				ps.SetHasProposalBlockPart(prs.Height, prs.Round, index)
				continue OUTER_LOOP
			} else {
				//log.Info("No parts to send in catch-up, sleeping")
				time.Sleep(peerGossipSleepDuration)
				continue OUTER_LOOP
			}
		}

		// If height and round don't match, sleep.
		if (rs.Height != prs.Height) || (rs.Round != prs.Round) {
			//log.Info("Peer Height|Round mismatch, sleeping", "peerHeight", prs.Height, "peerRound", prs.Round, "peer", peer)
			time.Sleep(peerGossipSleepDuration)
			continue OUTER_LOOP
		}

		// By here, height and round match.
		// Proposal block parts were already matched and sent if any were wanted.
		// (These can match on hash so the round doesn't matter)
		// Now consider sending other things, like the Proposal itself.

		// Send Proposal && ProposalPOL BitArray?
		if rs.Proposal != nil && !prs.Proposal {
			// Proposal
			{
				msg := &ProposalMessage{Proposal: rs.Proposal}
				peer.Send(DataChannel, msg)
				ps.SetHasProposal(rs.Proposal)
			}
			// ProposalPOL.
			// Peer must receive ProposalMessage first.
			// rs.Proposal was validated, so rs.Proposal.POLRound <= rs.Round,
			// so we definitely have rs.Votes.Prevotes(rs.Proposal.POLRound).
			if 0 <= rs.Proposal.POLRound {
				msg := &ProposalPOLMessage{
					Height:           rs.Height,
					ProposalPOLRound: rs.Proposal.POLRound,
					ProposalPOL:      rs.Votes.Prevotes(rs.Proposal.POLRound).BitArray(),
				}
				peer.Send(DataChannel, msg)
			}
			continue OUTER_LOOP
		}

//.........这里部分代码省略.........