Merge branch 'main' into traceDB

cmd/harmony/flags.go

@@ -238,6 +238,11 @@ var (
 		Usage:    "run node in offline mode",
 		DefValue: defaultConfig.General.IsOffline,
 	}
+	isBackupFlag = cli.BoolFlag{
+		Name:     "run.backup",
+		Usage:    "run node in backup mode",
+		DefValue: defaultConfig.General.IsBackup,
+	}
 	dataDirFlag = cli.StringFlag{
 		Name:     "datadir",
 		Usage:    "directory of chain database",
@@ -353,6 +358,10 @@ func applyGeneralFlags(cmd *cobra.Command, config *harmonyconfig.HarmonyConfig)
 
 	if cli.IsFlagChanged(cmd, taraceFlag) {
 		config.General.TraceEnable = cli.GetBoolFlagValue(cmd, taraceFlag)
+  }
+ 
+	if cli.IsFlagChanged(cmd, isBackupFlag) {
+		config.General.IsBackup = cli.GetBoolFlagValue(cmd, isBackupFlag)
 	}
 }
 

cmd/harmony/main.go

@@ -688,15 +688,7 @@ func setupConsensusAndNode(hc harmonyconfig.HarmonyConfig, nodeConfig *nodeconfi
 	)
 
 	nodeconfig.GetDefaultConfig().DBDir = nodeConfig.DBDir
-	switch hc.General.NodeType {
-	case nodeTypeExplorer:
-		nodeconfig.SetDefaultRole(nodeconfig.ExplorerNode)
-		currentNode.NodeConfig.SetRole(nodeconfig.ExplorerNode)
-
-	case nodeTypeValidator:
-		nodeconfig.SetDefaultRole(nodeconfig.Validator)
-		currentNode.NodeConfig.SetRole(nodeconfig.Validator)
-	}
+	processNodeType(hc, currentNode, currentConsensus)
 	currentNode.NodeConfig.SetShardGroupID(nodeconfig.NewGroupIDByShardID(nodeconfig.ShardID(nodeConfig.ShardID)))
 	currentNode.NodeConfig.SetClientGroupID(nodeconfig.NewClientGroupIDByShardID(shard.BeaconChainShardID))
 	currentNode.NodeConfig.ConsensusPriKey = nodeConfig.ConsensusPriKey
@@ -725,6 +717,22 @@ func setupConsensusAndNode(hc harmonyconfig.HarmonyConfig, nodeConfig *nodeconfi
 	return currentNode
 }
 
+func processNodeType(hc harmonyconfig.HarmonyConfig, currentNode *node.Node, currentConsensus *consensus.Consensus) {
+	switch hc.General.NodeType {
+	case nodeTypeExplorer:
+		nodeconfig.SetDefaultRole(nodeconfig.ExplorerNode)
+		currentNode.NodeConfig.SetRole(nodeconfig.ExplorerNode)
+
+	case nodeTypeValidator:
+		nodeconfig.SetDefaultRole(nodeconfig.Validator)
+		currentNode.NodeConfig.SetRole(nodeconfig.Validator)
+
+		if hc.General.IsBackup {
+			currentConsensus.SetIsBackup(true)
+		}
+	}
+}
+
 func setupPrometheusService(node *node.Node, hc harmonyconfig.HarmonyConfig, sid uint32) {
 	prometheusConfig := prometheus.Config{
 		Enabled:    hc.Prometheus.Enabled,

consensus/consensus.go

@@ -48,6 +48,8 @@ type Consensus struct {
 	phase FBFTPhase
 	// current indicates what state a node is in
 	current State
+	// isBackup declarative the node is in backup mode
+	isBackup bool
 	// 2 types of timeouts: normal and viewchange
 	consensusTimeout map[TimeoutType]*utils.Timeout
 	// Commits collected from validators.
@@ -185,6 +187,10 @@ func (consensus *Consensus) SetBlockVerifier(verifier VerifyBlockFunc) {
 	consensus.vc.SetVerifyBlock(consensus.VerifyBlock)
 }
 
+func (consensus *Consensus) IsBackup() bool {
+	return consensus.isBackup
+}
+
 // New create a new Consensus record
 func New(
 	host p2p.Host, shard uint32, leader p2p.Peer, multiBLSPriKey multibls.PrivateKeys,

consensus/consensus_service.go

@@ -173,12 +173,25 @@ func (consensus *Consensus) IsValidatorInCommittee(pubKey bls.SerializedPublicKe
 
 // SetMode sets the mode of consensus
 func (consensus *Consensus) SetMode(m Mode) {
+	if m == Normal && consensus.isBackup {
+		m = NormalBackup
+	}
+
 	consensus.getLogger().Debug().
 		Str("Mode", m.String()).
 		Msg("[SetMode]")
 	consensus.current.SetMode(m)
 }
 
+// SetIsBackup sets the mode of consensus
+func (consensus *Consensus) SetIsBackup(isBackup bool) {
+	consensus.getLogger().Debug().
+		Bool("IsBackup", isBackup).
+		Msg("[SetIsBackup]")
+	consensus.isBackup = isBackup
+	consensus.current.SetIsBackup(isBackup)
+}
+
 // Mode returns the mode of consensus
 func (consensus *Consensus) Mode() Mode {
 	return consensus.current.Mode()
@@ -200,7 +213,7 @@ func (consensus *Consensus) checkViewID(msg *FBFTMessage) error {
 	if consensus.IgnoreViewIDCheck.IsSet() {
 		//in syncing mode, node accepts incoming messages without viewID/leaderKey checking
 		//so only set mode to normal when new node enters consensus and need checking viewID
-		consensus.current.SetMode(Normal)
+		consensus.SetMode(Normal)
 		consensus.SetViewIDs(msg.ViewID)
 		if !msg.HasSingleSender() {
 			return errors.New("Leader message can not have multiple sender keys")

consensus/consensus_v2.go

@@ -92,10 +92,17 @@ func (consensus *Consensus) HandleMessageUpdate(ctx context.Context, msg *msg_pb
 		return errors.Wrapf(err, "unable to parse consensus msg with type: %s", msg.Type)
 	}
 
+	canHandleViewChange := true
 	intendedForValidator, intendedForLeader :=
 		!consensus.IsLeader(),
 		consensus.IsLeader()
 
+	// if in backup normal mode, force ignore view change event and leader event.
+	if consensus.current.Mode() == NormalBackup {
+		canHandleViewChange = false
+		intendedForLeader = false
+	}
+
 	// Route message to handler
 	switch t := msg.Type; true {
 	// Handle validator intended messages first
@@ -113,9 +120,9 @@ func (consensus *Consensus) HandleMessageUpdate(ctx context.Context, msg *msg_pb
 		consensus.onCommit(fbftMsg)
 
 	// Handle view change messages
-	case t == msg_pb.MessageType_VIEWCHANGE:
+	case t == msg_pb.MessageType_VIEWCHANGE && canHandleViewChange:
 		consensus.onViewChange(fbftMsg)
-	case t == msg_pb.MessageType_NEWVIEW:
+	case t == msg_pb.MessageType_NEWVIEW && canHandleViewChange:
 		consensus.onNewView(fbftMsg)
 	}
 

consensus/enums.go

@@ -14,6 +14,8 @@ const (
 	Syncing
 	// Listening ..
 	Listening
+	// NormalBackup Backup Node ..
+	NormalBackup
 )
 
 // FBFTPhase : different phases of consensus
@@ -32,6 +34,7 @@ var (
 		ViewChanging: "ViewChanging",
 		Syncing:      "Syncing",
 		Listening:    "Listening",
+		NormalBackup: "NormalBackup",
 	}
 	phaseNames = map[FBFTPhase]string{
 		FBFTAnnounce: "Announce",

consensus/validator.go

@@ -57,9 +57,14 @@ func (consensus *Consensus) onAnnounce(msg *msg_pb.Message) {
 		return
 	}
 	consensus.prepare()
+	consensus.switchPhase("Announce", FBFTPrepare)
 }
 
 func (consensus *Consensus) prepare() {
+	if consensus.IsBackup() {
+		return
+	}
+
 	priKeys := consensus.getPriKeysInCommittee()
 
 	p2pMsgs := consensus.constructP2pMessages(msg_pb.MessageType_PREPARE, nil, priKeys)
@@ -71,12 +76,14 @@ func (consensus *Consensus) prepare() {
 			Str("blockHash", hex.EncodeToString(consensus.blockHash[:])).
 			Msg("[OnAnnounce] Sent Prepare Message!!")
 	}
-
-	consensus.switchPhase("Announce", FBFTPrepare)
 }
 
 // sendCommitMessages send out commit messages to leader
 func (consensus *Consensus) sendCommitMessages(blockObj *types.Block) {
+	if consensus.IsBackup() {
+		return
+	}
+
 	priKeys := consensus.getPriKeysInCommittee()
 
 	// Sign commit signature on the received block and construct the p2p messages

consensus/view_change.go

@@ -37,7 +37,8 @@ type State struct {
 	// it is the next view id
 	viewChangingID uint64
 
-	viewMux sync.RWMutex
+	viewMux  sync.RWMutex
+	isBackup bool
 }
 
 // Mode return the current node mode
@@ -49,6 +50,10 @@ func (pm *State) Mode() Mode {
 
 // SetMode set the node mode as required
 func (pm *State) SetMode(s Mode) {
+	if s == Normal && pm.isBackup {
+		s = NormalBackup
+	}
+
 	pm.modeMux.Lock()
 	defer pm.modeMux.Unlock()
 	pm.mode = s
@@ -95,6 +100,10 @@ func (pm *State) GetViewChangeDuraion() time.Duration {
 	return time.Duration(diff * diff * int64(viewChangeDuration))
 }
 
+func (pm *State) SetIsBackup(isBackup bool) {
+	pm.isBackup = isBackup
+}
+
 // fallbackNextViewID return the next view ID and duration when there is an exception
 // to calculate the time-based viewId
 func (consensus *Consensus) fallbackNextViewID() (uint64, time.Duration) {
@@ -229,7 +238,7 @@ func createTimeout() map[TimeoutType]*utils.Timeout {
 
 // startViewChange start the view change process
 func (consensus *Consensus) startViewChange() {
-	if consensus.disableViewChange {
+	if consensus.disableViewChange || consensus.IsBackup() {
 		return
 	}
 	consensus.mutex.Lock()

core/headerchain.go

@@ -39,9 +39,10 @@ import (
 )
 
 const (
-	headerCacheLimit = 512
-	tdCacheLimit     = 1024
-	numberCacheLimit = 2048
+	headerCacheLimit    = 2048 // with 2s/block, 2048 headers is roughly block produced in 1 hour.
+	tdCacheLimit        = 1024
+	numberCacheLimit    = 4096
+	canonicalCacheLimit = 4096
 )
 
 // HeaderChain implements the basic block header chain logic that is shared by
@@ -58,9 +59,10 @@ type HeaderChain struct {
 	currentHeader     atomic.Value // Current head of the header chain (may be above the block chain!)
 	currentHeaderHash common.Hash  // Hash of the current head of the header chain (prevent recomputing all the time)
 
-	headerCache *lru.Cache // Cache for the most recent block headers
-	tdCache     *lru.Cache // Cache for the most recent block total difficulties
-	numberCache *lru.Cache // Cache for the most recent block numbers
+	headerCache    *lru.Cache // Cache for the most recent block headers
+	tdCache        *lru.Cache // Cache for the most recent block total difficulties
+	numberCache    *lru.Cache // Cache for the most recent block numbers
+	canonicalCache *lru.Cache // number -> Hash
 
 	procInterrupt func() bool
 
@@ -76,6 +78,7 @@ func NewHeaderChain(chainDb ethdb.Database, config *params.ChainConfig, engine c
 	headerCache, _ := lru.New(headerCacheLimit)
 	tdCache, _ := lru.New(tdCacheLimit)
 	numberCache, _ := lru.New(numberCacheLimit)
+	canonicalHash, _ := lru.New(canonicalCacheLimit)
 
 	// Seed a fast but crypto originating random generator
 	seed, err := crand.Int(crand.Reader, big.NewInt(math.MaxInt64))
@@ -84,14 +87,15 @@ func NewHeaderChain(chainDb ethdb.Database, config *params.ChainConfig, engine c
 	}
 
 	hc := &HeaderChain{
-		config:        config,
-		chainDb:       chainDb,
-		headerCache:   headerCache,
-		tdCache:       tdCache,
-		numberCache:   numberCache,
-		procInterrupt: procInterrupt,
-		rand:          mrand.New(mrand.NewSource(seed.Int64())),
-		engine:        engine,
+		config:         config,
+		chainDb:        chainDb,
+		headerCache:    headerCache,
+		tdCache:        tdCache,
+		numberCache:    numberCache,
+		canonicalCache: canonicalHash,
+		procInterrupt:  procInterrupt,
+		rand:           mrand.New(mrand.NewSource(seed.Int64())),
+		engine:         engine,
 	}
 
 	hc.genesisHeader = hc.GetHeaderByNumber(0)
@@ -191,6 +195,8 @@ func (hc *HeaderChain) WriteHeader(header *block.Header) (status WriteStatus, er
 
 	hc.headerCache.Add(hash, header)
 	hc.numberCache.Add(hash, number)
+	// when writing headers, it will write to canonical by default
+	hc.canonicalCache.Add(number, hash)
 
 	return
 }
@@ -434,13 +440,26 @@ func (hc *HeaderChain) HasHeader(hash common.Hash, number uint64) bool {
 // GetHeaderByNumber retrieves a block header from the database by number,
 // caching it (associated with its hash) if found.
 func (hc *HeaderChain) GetHeaderByNumber(number uint64) *block.Header {
-	hash := rawdb.ReadCanonicalHash(hc.chainDb, number)
+	hash := hc.getHashByNumber(number)
 	if hash == (common.Hash{}) {
 		return nil
 	}
 	return hc.GetHeader(hash, number)
 }
 
+func (hc *HeaderChain) getHashByNumber(number uint64) common.Hash {
+	// Since canonical chain is immutable, it's safe to read header
+	// hash by number from cache.
+	if hash, ok := hc.canonicalCache.Get(number); ok {
+		return hash.(common.Hash)
+	}
+	hash := rawdb.ReadCanonicalHash(hc.chainDb, number)
+	if hash != (common.Hash{}) {
+		hc.canonicalCache.Add(number, hash)
+	}
+	return hash
+}
+
 // CurrentHeader retrieves the current head header of the canonical chain. The
 // header is retrieved from the HeaderChain's internal cache.
 func (hc *HeaderChain) CurrentHeader() *block.Header {
@@ -505,6 +524,7 @@ func (hc *HeaderChain) SetHead(head uint64, delFn DeleteCallback) error {
 	hc.headerCache.Purge()
 	hc.tdCache.Purge()
 	hc.numberCache.Purge()
+	hc.canonicalCache.Purge()
 
 	if hc.CurrentHeader() == nil {
 		hc.currentHeader.Store(hc.genesisHeader)

go.mod

@@ -34,7 +34,7 @@ require (
 	github.com/libp2p/go-libp2p-core v0.8.5
 	github.com/libp2p/go-libp2p-crypto v0.1.0
 	github.com/libp2p/go-libp2p-discovery v0.5.0
-	github.com/libp2p/go-libp2p-kad-dht v0.12.1
+	github.com/libp2p/go-libp2p-kad-dht v0.12.2
 	github.com/libp2p/go-libp2p-pubsub v0.4.1
 	github.com/multiformats/go-multiaddr v0.3.1
 	github.com/multiformats/go-multiaddr-dns v0.3.1

hmy/hmy.go

@@ -102,6 +102,8 @@ type NodeAPI interface {
 	ListBlockedPeer() []peer.ID
 
 	GetConsensusInternal() commonRPC.ConsensusInternal
+	IsBackup() bool
+	SetNodeBackupMode(isBackup bool) bool
 
 	// debug API
 	GetConsensusMode() string
@@ -206,6 +208,7 @@ func (hmy *Harmony) GetNodeMetadata() commonRPC.NodeMetadata {
 		Role:            cfg.Role().String(),
 		DNSZone:         cfg.DNSZone,
 		Archival:        cfg.GetArchival(),
+		IsBackup:        hmy.NodeAPI.IsBackup(),
 		NodeBootTime:    hmy.NodeAPI.GetNodeBootTime(),
 		PeerID:          nodeconfig.GetPeerID(),
 		Consensus:       consensusInternal,

internal/configs/harmony/harmony.go

@@ -56,6 +56,7 @@ type GeneralConfig struct {
 	NoStaking        bool
 	ShardID          int
 	IsArchival       bool
+	IsBackup         bool
 	IsBeaconArchival bool
 	IsOffline        bool
 	DataDir          string

node/api.go

@@ -143,6 +143,22 @@ func (node *Node) GetConsensusInternal() rpc_common.ConsensusInternal {
 	}
 }
 
+// IsBackup returns the node is in backup mode
+func (node *Node) IsBackup() bool {
+	return node.Consensus.IsBackup()
+}
+
+// SetNodeBackupMode change node backup mode
+func (node *Node) SetNodeBackupMode(isBackup bool) bool {
+	if node.Consensus.IsBackup() == isBackup {
+		return false
+	}
+
+	node.Consensus.SetIsBackup(isBackup)
+	node.Consensus.ResetViewChangeState()
+	return true
+}
+
 func (node *Node) GetConfig() rpc_common.Config {
 	return rpc_common.Config{
 		HarmonyConfig: *node.HarmonyConfig,

p2p/discovery/option.go

@@ -33,6 +33,7 @@ func (opt DHTConfig) getLibp2pRawOptions() ([]libp2p_dht.Option, error) {
 		opts = append(opts, dsOption)
 	}
 
+	opts = append(opts, libp2p_dht.Concurrency(1))
 	return opts, nil
 }
 

p2p/discovery/option_test.go

@@ -40,14 +40,14 @@ func TestDHTOption_getLibp2pRawOptions(t *testing.T) {
 			opt: DHTConfig{
 				BootNodes: testAddrStr,
 			},
-			expLen: 1,
+			expLen: 2,
 		},
 		{
 			opt: DHTConfig{
 				BootNodes:     testAddrStr,
 				DataStoreFile: &validPath,
 			},
-			expLen: 2,
+			expLen: 3,
 		},
 		{
 			opt: DHTConfig{

rpc/blockchain.go

@@ -838,6 +838,10 @@ func isBlockGreaterThanLatest(hmy *hmy.Harmony, blockNum rpc.BlockNumber) bool {
 	return uint64(blockNum) > hmy.CurrentBlock().NumberU64()
 }
 
+func (s *PublicBlockchainService) SetNodeToBackupMode(ctx context.Context, isBackup bool) (bool, error) {
+	return s.hmy.NodeAPI.SetNodeBackupMode(isBackup), nil
+}
+
 func combineCacheKey(number uint64, version Version, blockArgs *rpc_common.BlockArgs) string {
 	// no need format blockArgs.Signers[] as a part of cache key
 	// because it's not input from rpc caller, it's caculate with blockArgs.WithSigners

rpc/common/types.go

@@ -64,6 +64,7 @@ type NodeMetadata struct {
 	Role            string             `json:"role"`
 	DNSZone         string             `json:"dns-zone"`
 	Archival        bool               `json:"is-archival"`
+	IsBackup        bool               `json:"is-backup"`
 	NodeBootTime    int64              `json:"node-unix-start-time"`
 	PeerID          peer.ID            `json:"peerid"`
 	Consensus       ConsensusInternal  `json:"consensus"`