core: apply megacheck vet tool (unused, gosimple, staticcheck)

blockchain/pool.go

@@ -142,7 +142,7 @@ func (pool *BlockPool) IsCaughtUp() bool {
 		maxPeerHeight = MaxInt(maxPeerHeight, peer.height)
 	}
 
-	isCaughtUp := (height > 0 || time.Now().Sub(pool.startTime) > 5*time.Second) && (maxPeerHeight == 0 || height >= maxPeerHeight)
+	isCaughtUp := (height > 0 || time.Since(pool.startTime) > 5*time.Second) && (maxPeerHeight == 0 || height >= maxPeerHeight)
 	pool.Logger.Info(Fmt("IsCaughtUp: %v", isCaughtUp), "height", height, "maxPeerHeight", maxPeerHeight)
 	return isCaughtUp
 }
@@ -212,9 +212,9 @@ func (pool *BlockPool) AddBlock(peerID string, block *types.Block, blockSize int
 		pool.numPending--
 		peer := pool.peers[peerID]
 		peer.decrPending(blockSize)
-	} else {
-		// Bad peer?
-	}
+	} // else {
+	// Bad peer?
+	// }
 }
 
 // Sets the peer's alleged blockchain height.
@@ -261,7 +261,6 @@ func (pool *BlockPool) pickIncrAvailablePeer(minHeight int) *bpPeer {
 		if peer.didTimeout {
 			pool.removePeer(peer.id)
 			continue
-		} else {
 		}
 		if peer.numPending >= maxPendingRequestsPerPeer {
 			continue
@@ -303,7 +302,8 @@ func (pool *BlockPool) sendTimeout(peerID string) {
 	pool.timeoutsCh <- peerID
 }
 
-func (pool *BlockPool) debug() string {
+// unused by tendermint; left for debugging purposes
+/*func (pool *BlockPool) debug() string {
 	pool.mtx.Lock() // Lock
 	defer pool.mtx.Unlock()
 
@@ -317,7 +317,7 @@ func (pool *BlockPool) debug() string {
 		}
 	}
 	return str
-}
+}*/
 
 //-------------------------------------
 
@@ -326,7 +326,6 @@ type bpPeer struct {
 	id          string
 	recvMonitor *flow.Monitor
 
-	mtx        sync.Mutex
 	height     int
 	numPending int32
 	timeout    *time.Timer

blockchain/reactor.go

@@ -19,7 +19,6 @@ const (
 	BlockchainChannel = byte(0x40)
 
 	defaultChannelCapacity = 100
-	defaultSleepIntervalMS = 500
 	trySyncIntervalMS      = 100
 	// stop syncing when last block's time is
 	// within this much of the system time.
@@ -49,7 +48,6 @@ type BlockchainReactor struct {
 	fastSync     bool
 	requestsCh   chan BlockRequest
 	timeoutsCh   chan string
-	lastBlock    *types.Block
 
 	evsw types.EventSwitch
 }
@@ -134,6 +132,8 @@ func (bcR *BlockchainReactor) Receive(chID byte, src *p2p.Peer, msgBytes []byte)
 
 	bcR.Logger.Debug("Receive", "src", src, "chID", chID, "msg", msg)
 
+	// [zr] note: the `megacheck` tool (go vet on steroids)
+	// really dislikes the logic in this switch
 	switch msg := msg.(type) {
 	case *bcBlockRequestMessage:
 		// Got a request for a block. Respond with block if we have it.
@@ -194,10 +194,10 @@ FOR_LOOP:
 			if peer != nil {
 				bcR.Switch.StopPeerForError(peer, errors.New("BlockchainReactor Timeout"))
 			}
-		case _ = <-statusUpdateTicker.C:
+		case <-statusUpdateTicker.C:
 			// ask for status updates
 			go bcR.BroadcastStatusRequest()
-		case _ = <-switchToConsensusTicker.C:
+		case <-switchToConsensusTicker.C:
 			height, numPending, _ := bcR.pool.GetStatus()
 			outbound, inbound, _ := bcR.Switch.NumPeers()
 			bcR.Logger.Info("Consensus ticker", "numPending", numPending, "total", len(bcR.pool.requesters),
@@ -211,7 +211,7 @@ FOR_LOOP:
 
 				break FOR_LOOP
 			}
-		case _ = <-trySyncTicker.C: // chan time
+		case <-trySyncTicker.C: // chan time
 			// This loop can be slow as long as it's doing syncing work.
 		SYNC_LOOP:
 			for i := 0; i < 10; i++ {

consensus/byzantine_test.go

@@ -77,6 +77,7 @@ func TestByzantine(t *testing.T) {
 
 		var conRI p2p.Reactor
 		conRI = conR
+
 		if i == 0 {
 			conRI = NewByzantineReactor(conR)
 		}

consensus/common_test.go

@@ -222,17 +222,6 @@ func subscribeToVoter(cs *ConsensusState, addr []byte) chan interface{} {
 	return voteCh
 }
 
-func readVotes(ch chan interface{}, reads int) chan struct{} {
-	wg := make(chan struct{})
-	go func() {
-		for i := 0; i < reads; i++ {
-			<-ch // read the precommit event
-		}
-		close(wg)
-	}()
-	return wg
-}
-
 //-------------------------------------------------------------------------------
 // consensus states
 
@@ -274,16 +263,6 @@ func loadPrivValidator(config *cfg.Config) *types.PrivValidator {
 	return privValidator
 }
 
-func fixedConsensusState() *ConsensusState {
-	stateDB := dbm.NewMemDB()
-	state := sm.MakeGenesisStateFromFile(stateDB, config.GenesisFile())
-	state.SetLogger(log.TestingLogger().With("module", "state"))
-	privValidator := loadPrivValidator(config)
-	cs := newConsensusState(state, privValidator, counter.NewCounterApplication(true))
-	cs.SetLogger(log.TestingLogger())
-	return cs
-}
-
 func fixedConsensusStateDummy() *ConsensusState {
 	stateDB := dbm.NewMemDB()
 	state := sm.MakeGenesisStateFromFile(stateDB, config.GenesisFile())

consensus/height_vote_set_test.go

@@ -30,6 +30,9 @@ func TestPeerCatchupRounds(t *testing.T) {
 
 	vote1001_0 := makeVoteHR(t, 1, 1001, privVals, 0)
 	added, err = hvs.AddVote(vote1001_0, "peer1")
+	if err != nil {
+		t.Error("AddVote error", err)
+	}
 	if added {
 		t.Error("Expected to *not* add vote from peer, too many catchup rounds.")
 	}

consensus/reactor.go

@@ -351,7 +351,7 @@ func makeRoundStepMessages(rs *RoundState) (nrsMsg *NewRoundStepMessage, csMsg *
 		Height: rs.Height,
 		Round:  rs.Round,
 		Step:   rs.Step,
-		SecondsSinceStartTime: int(time.Now().Sub(rs.StartTime).Seconds()),
+		SecondsSinceStartTime: int(time.Since(rs.StartTime).Seconds()),
 		LastCommitRound:       rs.LastCommit.Round(),
 	}
 	if rs.Step == RoundStepCommit {

consensus/replay.go

@@ -104,6 +104,9 @@ func (cs *ConsensusState) catchupReplay(csHeight int) error {
 	// NOTE: This is just a sanity check. As far as we know things work fine without it,
 	// and Handshake could reuse ConsensusState if it weren't for this check (since we can crash after writing ENDHEIGHT).
 	gr, found, err := cs.wal.group.Search("#ENDHEIGHT: ", makeHeightSearchFunc(csHeight))
+	if err != nil {
+		return err
+	}
 	if gr != nil {
 		gr.Close()
 	}
@@ -132,7 +135,7 @@ func (cs *ConsensusState) catchupReplay(csHeight int) error {
 	if !found {
 		// if we upgraded from 0.9 to 0.9.1, we may have #HEIGHT instead
 		// TODO (0.10.0): remove this
-		gr, found, err = cs.wal.group.Search("#HEIGHT: ", makeHeightSearchFunc(csHeight))
+		gr, _, err = cs.wal.group.Search("#HEIGHT: ", makeHeightSearchFunc(csHeight))
 		if err == io.EOF {
 			cs.Logger.Error("Replay: wal.group.Search returned EOF", "#HEIGHT", csHeight)
 			return nil

consensus/replay_test.go

@@ -557,67 +557,6 @@ func readPieceFromWAL(msgBytes []byte) (interface{}, error) {
 	return nil, nil
 }
 
-// make some bogus txs
-func txsFunc(blockNum int) (txs []types.Tx) {
-	for i := 0; i < 10; i++ {
-		txs = append(txs, types.Tx([]byte{byte(blockNum), byte(i)}))
-	}
-	return txs
-}
-
-// sign a commit vote
-func signCommit(chainID string, privVal *types.PrivValidator, height, round int, hash []byte, header types.PartSetHeader) *types.Vote {
-	vote := &types.Vote{
-		ValidatorIndex:   0,
-		ValidatorAddress: privVal.Address,
-		Height:           height,
-		Round:            round,
-		Type:             types.VoteTypePrecommit,
-		BlockID:          types.BlockID{hash, header},
-	}
-
-	sig := privVal.Sign(types.SignBytes(chainID, vote))
-	vote.Signature = sig
-	return vote
-}
-
-// make a blockchain with one validator
-func makeBlockchain(t *testing.T, chainID string, nBlocks int, privVal *types.PrivValidator, proxyApp proxy.AppConns, state *sm.State) (blockchain []*types.Block, commits []*types.Commit) {
-
-	prevHash := state.LastBlockID.Hash
-	lastCommit := new(types.Commit)
-	prevParts := types.PartSetHeader{}
-	valHash := state.Validators.Hash()
-	prevBlockID := types.BlockID{prevHash, prevParts}
-
-	for i := 1; i < nBlocks+1; i++ {
-		block, parts := types.MakeBlock(i, chainID, txsFunc(i), lastCommit,
-			prevBlockID, valHash, state.AppHash, testPartSize)
-		fmt.Println(i)
-		fmt.Println(block.LastBlockID)
-		err := state.ApplyBlock(nil, proxyApp.Consensus(), block, block.MakePartSet(testPartSize).Header(), mempool)
-		if err != nil {
-			t.Fatal(i, err)
-		}
-
-		voteSet := types.NewVoteSet(chainID, i, 0, types.VoteTypePrecommit, state.Validators)
-		vote := signCommit(chainID, privVal, i, 0, block.Hash(), parts.Header())
-		_, err = voteSet.AddVote(vote)
-		if err != nil {
-			t.Fatal(err)
-		}
-
-		prevHash = block.Hash()
-		prevParts = parts.Header()
-		lastCommit = voteSet.MakeCommit()
-		prevBlockID = types.BlockID{prevHash, prevParts}
-
-		blockchain = append(blockchain, block)
-		commits = append(commits, lastCommit)
-	}
-	return blockchain, commits
-}
-
 // fresh state and mock store
 func stateAndStore(config *cfg.Config, pubKey crypto.PubKey) (*sm.State, *mockBlockStore) {
 	stateDB := dbm.NewMemDB()

consensus/state.go

@@ -648,10 +648,10 @@ func (cs *ConsensusState) handleMsg(mi msgInfo, rs RoundState) {
 	case *VoteMessage:
 		// attempt to add the vote and dupeout the validator if its a duplicate signature
 		// if the vote gives us a 2/3-any or 2/3-one, we transition
-		err := cs.tryAddVote(msg.Vote, peerKey)
-		if err == ErrAddingVote {
-			// TODO: punish peer
-		}
+		_ = cs.tryAddVote(msg.Vote, peerKey)
+		//if err == ErrAddingVote {
+		// TODO: punish peer
+		//}
 
 		// NOTE: the vote is broadcast to peers by the reactor listening
 		// for vote events
@@ -897,10 +897,10 @@ func (cs *ConsensusState) enterPrevote(height int, round int) {
 	// fire event for how we got here
 	if cs.isProposalComplete() {
 		types.FireEventCompleteProposal(cs.evsw, cs.RoundStateEvent())
-	} else {
-		// we received +2/3 prevotes for a future round
-		// TODO: catchup event?
-	}
+	} // else {
+	// we received +2/3 prevotes for a future round
+	// TODO: catchup event?
+	//}
 
 	cs.Logger.Info(cmn.Fmt("enterPrevote(%v/%v). Current: %v/%v/%v", height, round, cs.Height, cs.Round, cs.Step))
 
@@ -939,7 +939,6 @@ func (cs *ConsensusState) defaultDoPrevote(height int, round int) {
 	// NOTE: the proposal signature is validated when it is received,
 	// and the proposal block parts are validated as they are received (against the merkle hash in the proposal)
 	cs.signAddVote(types.VoteTypePrevote, cs.ProposalBlock.Hash(), cs.ProposalBlockParts.Header())
-	return
 }
 
 // Enter: any +2/3 prevotes at next round.
@@ -1059,7 +1058,6 @@ func (cs *ConsensusState) enterPrecommit(height int, round int) {
 	}
 	types.FireEventUnlock(cs.evsw, cs.RoundStateEvent())
 	cs.signAddVote(types.VoteTypePrecommit, nil, types.PartSetHeader{})
-	return
 }
 
 // Enter: any +2/3 precommits for next round.
@@ -1124,9 +1122,9 @@ func (cs *ConsensusState) enterCommit(height int, commitRound int) {
 			// Set up ProposalBlockParts and keep waiting.
 			cs.ProposalBlock = nil
 			cs.ProposalBlockParts = types.NewPartSetFromHeader(blockID.PartsHeader)
-		} else {
-			// We just need to keep waiting.
-		}
+		} // else {
+		// We just need to keep waiting.
+		//}
 	}
 }
 
@@ -1250,7 +1248,6 @@ func (cs *ConsensusState) finalizeCommit(height int) {
 	// * cs.Height has been increment to height+1
 	// * cs.Step is now RoundStepNewHeight
 	// * cs.StartTime is set to when we will start round0.
-	return
 }
 
 //-----------------------------------------------------------------------------

consensus/state_test.go

@@ -523,7 +523,10 @@ func TestLockPOLRelock(t *testing.T) {
 	<-voteCh // prevote
 
 	signAddVotes(cs1, types.VoteTypePrevote, cs1.ProposalBlock.Hash(), cs1.ProposalBlockParts.Header(), vs2, vs3, vs4)
-	_, _, _ = <-voteCh, <-voteCh, <-voteCh // prevotes
+	// prevotes
+	<-voteCh
+	<-voteCh
+	<-voteCh
 
 	<-voteCh // our precommit
 	// the proposed block should now be locked and our precommit added
@@ -532,7 +535,10 @@ func TestLockPOLRelock(t *testing.T) {
 	// add precommits from the rest
 	signAddVotes(cs1, types.VoteTypePrecommit, nil, types.PartSetHeader{}, vs2, vs4)
 	signAddVotes(cs1, types.VoteTypePrecommit, cs1.ProposalBlock.Hash(), cs1.ProposalBlockParts.Header(), vs3)
-	_, _, _ = <-voteCh, <-voteCh, <-voteCh // precommits
+	// precommites
+	<-voteCh
+	<-voteCh
+	<-voteCh
 
 	// before we timeout to the new round set the new proposal
 	prop, propBlock := decideProposal(cs1, vs2, vs2.Height, vs2.Round+1)
@@ -570,7 +576,10 @@ func TestLockPOLRelock(t *testing.T) {
 
 	// now lets add prevotes from everyone else for the new block
 	signAddVotes(cs1, types.VoteTypePrevote, propBlockHash, propBlockParts.Header(), vs2, vs3, vs4)
-	_, _, _ = <-voteCh, <-voteCh, <-voteCh // prevotes
+	// prevotes
+	<-voteCh
+	<-voteCh
+	<-voteCh
 
 	// now either we go to PrevoteWait or Precommit
 	select {
@@ -585,7 +594,8 @@ func TestLockPOLRelock(t *testing.T) {
 	validatePrecommit(t, cs1, 1, 1, vss[0], propBlockHash, propBlockHash)
 
 	signAddVotes(cs1, types.VoteTypePrecommit, propBlockHash, propBlockParts.Header(), vs2, vs3)
-	_, _ = <-voteCh, <-voteCh
+	<-voteCh
+	<-voteCh
 
 	be := <-newBlockCh
 	b := be.(types.TMEventData).Unwrap().(types.EventDataNewBlockHeader)

p2p/addrbook.go

@@ -68,9 +68,6 @@ const (
 	// max addresses returned by GetSelection
 	// NOTE: this must match "maxPexMessageSize"
 	maxGetSelection = 250
-
-	// current version of the on-disk format.
-	serializationVersion = 1
 )
 
 const (

p2p/connection.go

@@ -366,9 +366,9 @@ func (c *MConnection) sendMsgPacket() bool {
 	// Nothing to send?
 	if leastChannel == nil {
 		return true
-	} else {
-		// c.Logger.Info("Found a msgPacket to send")
-	}
+	} // else {
+	// c.Logger.Info("Found a msgPacket to send")
+	//}
 
 	// Make & send a msgPacket from this channel
 	n, err := leastChannel.writeMsgPacketTo(c.bufWriter)
@@ -468,7 +468,7 @@ FOR_LOOP:
 
 	// Cleanup
 	close(c.pong)
-	for _ = range c.pong {
+	for range c.pong {
 		// Drain
 	}
 }

p2p/listener.go

@@ -135,7 +135,7 @@ func (l *DefaultListener) listenRoutine() {
 
 	// Cleanup
 	close(l.connections)
-	for _ = range l.connections {
+	for range l.connections {
 		// Drain
 	}
 }

p2p/netaddress.go

@@ -174,7 +174,6 @@ func (na *NetAddress) ReachabilityTo(o *NetAddress) int {
 		Ipv6_weak
 		Ipv4
 		Ipv6_strong
-		Private
 	)
 	if !na.Routable() {
 		return Unreachable

p2p/pex_reactor.go

@@ -44,7 +44,6 @@ const (
 type PEXReactor struct {
 	BaseReactor
 
-	sw                *Switch
 	book              *AddrBook
 	ensurePeersPeriod time.Duration
 

p2p/secret_connection.go

@@ -293,10 +293,6 @@ func shareAuthSignature(sc *SecretConnection, pubKey crypto.PubKeyEd25519, signa
 	return &recvMsg, nil
 }
 
-func verifyChallengeSignature(challenge *[32]byte, remPubKey crypto.PubKeyEd25519, remSignature crypto.SignatureEd25519) bool {
-	return remPubKey.VerifyBytes(challenge[:], remSignature.Wrap())
-}
-
 //--------------------------------------------------------------------------------
 
 // sha256
@@ -319,16 +315,6 @@ func hash24(input []byte) (res *[24]byte) {
 	return
 }
 
-// ripemd160
-func hash20(input []byte) (res *[20]byte) {
-	hasher := ripemd160.New()
-	hasher.Write(input) // does not error
-	resSlice := hasher.Sum(nil)
-	res = new([20]byte)
-	copy(res[:], resSlice)
-	return
-}
-
 // increment nonce big-endian by 2 with wraparound.
 func incr2Nonce(nonce *[24]byte) {
 	incrNonce(nonce)

p2p/upnp/probe.go

@@ -1,7 +1,6 @@
 package upnp
 
 import (
-	"errors"
 	"fmt"
 	"net"
 	"time"
@@ -18,26 +17,26 @@ type UPNPCapabilities struct {
 func makeUPNPListener(intPort int, extPort int, logger log.Logger) (NAT, net.Listener, net.IP, error) {
 	nat, err := Discover()
 	if err != nil {
-		return nil, nil, nil, errors.New(fmt.Sprintf("NAT upnp could not be discovered: %v", err))
+		return nil, nil, nil, fmt.Errorf("NAT upnp could not be discovered: %v", err)
 	}
 	logger.Info(cmn.Fmt("ourIP: %v", nat.(*upnpNAT).ourIP))
 
 	ext, err := nat.GetExternalAddress()
 	if err != nil {
-		return nat, nil, nil, errors.New(fmt.Sprintf("External address error: %v", err))
+		return nat, nil, nil, fmt.Errorf("External address error: %v", err)
 	}
 	logger.Info(cmn.Fmt("External address: %v", ext))
 
 	port, err := nat.AddPortMapping("tcp", extPort, intPort, "Tendermint UPnP Probe", 0)
 	if err != nil {
-		return nat, nil, ext, errors.New(fmt.Sprintf("Port mapping error: %v", err))
+		return nat, nil, ext, fmt.Errorf("Port mapping error: %v", err)
 	}
 	logger.Info(cmn.Fmt("Port mapping mapped: %v", port))
 
 	// also run the listener, open for all remote addresses.
 	listener, err := net.Listen("tcp", fmt.Sprintf(":%v", intPort))
 	if err != nil {
-		return nat, nil, ext, errors.New(fmt.Sprintf("Error establishing listener: %v", err))
+		return nat, nil, ext, fmt.Errorf("Error establishing listener: %v", err)
 	}
 	return nat, listener, ext, nil
 }

p2p/upnp/upnp.go

@@ -65,14 +65,14 @@ func Discover() (nat NAT, err error) {
 			return
 		}
 		var n int
-		n, _, err = socket.ReadFromUDP(answerBytes)
+		_, _, err = socket.ReadFromUDP(answerBytes)
 		for {
 			n, _, err = socket.ReadFromUDP(answerBytes)
 			if err != nil {
 				break
 			}
 			answer := string(answerBytes[0:n])
-			if strings.Index(answer, st) < 0 {
+			if !strings.Contains(answer, st) {
 				continue
 			}
 			// HTTP header field names are case-insensitive.
@@ -153,7 +153,7 @@ type Root struct {
 func getChildDevice(d *Device, deviceType string) *Device {
 	dl := d.DeviceList.Device
 	for i := 0; i < len(dl); i++ {
-		if strings.Index(dl[i].DeviceType, deviceType) >= 0 {
+		if strings.Contains(dl[i].DeviceType, deviceType) {
 			return &dl[i]
 		}
 	}
@@ -163,7 +163,7 @@ func getChildDevice(d *Device, deviceType string) *Device {
 func getChildService(d *Device, serviceType string) *UPNPService {
 	sl := d.ServiceList.Service
 	for i := 0; i < len(sl); i++ {
-		if strings.Index(sl[i].ServiceType, serviceType) >= 0 {
+		if strings.Contains(sl[i].ServiceType, serviceType) {
 			return &sl[i]
 		}
 	}
@@ -211,7 +211,7 @@ func getServiceURL(rootURL string) (url, urnDomain string, err error) {
 		return
 	}
 	a := &root.Device
-	if strings.Index(a.DeviceType, "InternetGatewayDevice:1") < 0 {
+	if !strings.Contains(a.DeviceType, "InternetGatewayDevice:1") {
 		err = errors.New("No InternetGatewayDevice")
 		return
 	}

rpc/test/client_test.go

@@ -238,8 +238,6 @@ func testTx(t *testing.T, client rpc.HTTPClient, withIndexer bool) {
 //--------------------------------------------------------------------------------
 // Test the websocket service
 
-var wsTyp = "JSONRPC"
-
 // make a simple connection to the server
 func TestWSConnect(t *testing.T) {
 	wsc := GetWSClient()

state/execution.go

@@ -155,18 +155,6 @@ func updateValidators(validators *types.ValidatorSet, changedValidators []*abci.
 	return nil
 }
 
-// return a bit array of validators that signed the last commit
-// NOTE: assumes commits have already been authenticated
-func commitBitArrayFromBlock(block *types.Block) *cmn.BitArray {
-	signed := cmn.NewBitArray(len(block.LastCommit.Precommits))
-	for i, precommit := range block.LastCommit.Precommits {
-		if precommit != nil {
-			signed.SetIndex(i, true) // val_.LastCommitHeight = block.Height - 1
-		}
-	}
-	return signed
-}
-
 //-----------------------------------------------------
 // Validate block
 

state/state.go

@@ -46,10 +46,6 @@ type State struct {
 
 	TxIndexer txindex.TxIndexer `json:"-"` // Transaction indexer.
 
-	// Intermediate results from processing
-	// Persisted separately from the state
-	abciResponses *ABCIResponses
-
 	logger log.Logger
 }
 

state/txindex/kv/kv_test.go

@@ -8,9 +8,9 @@ import (
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 	abci "github.com/tendermint/abci/types"
-	db "github.com/tendermint/tmlibs/db"
 	"github.com/tendermint/tendermint/state/txindex"
 	"github.com/tendermint/tendermint/types"
+	db "github.com/tendermint/tmlibs/db"
 )
 
 func TestTxIndex(t *testing.T) {
@@ -52,7 +52,7 @@ func benchmarkTxIndex(txsCount int, b *testing.B) {
 	b.ResetTimer()
 
 	for n := 0; n < b.N; n++ {
-		err = indexer.AddBatch(batch)
+		_ = indexer.AddBatch(batch)
 	}
 }
 

types/block.go

@@ -282,10 +282,7 @@ func (commit *Commit) GetByIndex(index int) *Vote {
 }
 
 func (commit *Commit) IsCommit() bool {
-	if len(commit.Precommits) == 0 {
-		return false
-	}
-	return true
+	return len(commit.Precommits) == 0
 }
 
 func (commit *Commit) ValidateBasic() error {

types/validator_set.go

@@ -85,14 +85,14 @@ func (valSet *ValidatorSet) HasAddress(address []byte) bool {
 	idx := sort.Search(len(valSet.Validators), func(i int) bool {
 		return bytes.Compare(address, valSet.Validators[i].Address) <= 0
 	})
-	return idx != len(valSet.Validators) && bytes.Compare(valSet.Validators[idx].Address, address) == 0
+	return idx != len(valSet.Validators) && bytes.Equal(valSet.Validators[idx].Address, address)
 }
 
 func (valSet *ValidatorSet) GetByAddress(address []byte) (index int, val *Validator) {
 	idx := sort.Search(len(valSet.Validators), func(i int) bool {
 		return bytes.Compare(address, valSet.Validators[i].Address) <= 0
 	})
-	if idx != len(valSet.Validators) && bytes.Compare(valSet.Validators[idx].Address, address) == 0 {
+	if idx != len(valSet.Validators) && bytes.Equal(valSet.Validators[idx].Address, address) {
 		return idx, valSet.Validators[idx].Copy()
 	} else {
 		return 0, nil
@@ -159,7 +159,7 @@ func (valSet *ValidatorSet) Add(val *Validator) (added bool) {
 		valSet.Proposer = nil
 		valSet.totalVotingPower = 0
 		return true
-	} else if bytes.Compare(valSet.Validators[idx].Address, val.Address) == 0 {
+	} else if bytes.Equal(valSet.Validators[idx].Address, val.Address) {
 		return false
 	} else {
 		newValidators := make([]*Validator, len(valSet.Validators)+1)
@@ -191,7 +191,7 @@ func (valSet *ValidatorSet) Remove(address []byte) (val *Validator, removed bool
 	idx := sort.Search(len(valSet.Validators), func(i int) bool {
 		return bytes.Compare(address, valSet.Validators[i].Address) <= 0
 	})
-	if idx == len(valSet.Validators) || bytes.Compare(valSet.Validators[idx].Address, address) != 0 {
+	if idx == len(valSet.Validators) || !bytes.Equal(valSet.Validators[idx].Address, address) {
 		return nil, false
 	} else {
 		removedVal := valSet.Validators[idx]