Resolve conflicts

5 years ago · f15db6be8c
parent ae94397fe0 309a2aef46
commit f15db6be8c
3 changed files with 1530 additions and 0 deletions
--- a/cmd/client/txgen/main.go
+++ b/cmd/client/txgen/main.go
@ -0,0 +1,328 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"math/big"
+	"math/rand"
+	"os"
+	"path"
+	"sync"
+	"time"
+
+	"github.com/ethereum/go-ethereum/crypto"
+	"github.com/ethereum/go-ethereum/log"
+	bls2 "github.com/harmony-one/bls/ffi/go/bls"
+	"github.com/harmony-one/harmony/api/client"
+	proto_node "github.com/harmony-one/harmony/api/proto/node"
+	"github.com/harmony-one/harmony/common/denominations"
+	"github.com/harmony-one/harmony/consensus"
+	"github.com/harmony-one/harmony/consensus/quorum"
+	"github.com/harmony-one/harmony/core"
+	"github.com/harmony-one/harmony/core/types"
+	"github.com/harmony-one/harmony/crypto/bls"
+	nodeconfig "github.com/harmony-one/harmony/internal/configs/node"
+	"github.com/harmony-one/harmony/internal/genesis"
+	"github.com/harmony-one/harmony/internal/params"
+	"github.com/harmony-one/harmony/internal/shardchain"
+	"github.com/harmony-one/harmony/internal/utils"
+	"github.com/harmony-one/harmony/node"
+	"github.com/harmony-one/harmony/p2p"
+	p2p_host "github.com/harmony-one/harmony/p2p/host"
+	"github.com/harmony-one/harmony/p2p/p2pimpl"
+	"github.com/harmony-one/harmony/shard"
+)
+
+var (
+	version    string
+	builtBy    string
+	builtAt    string
+	commit     string
+	stateMutex sync.Mutex
+)
+
+const (
+	checkFrequency = 2 //checkfrequency checks whether the transaction generator is ready to send the next batch of transactions.
+)
+
+// Settings is the settings for TX generation. No Cross-Shard Support!
+type Settings struct {
+	NumOfAddress      int
+	MaxNumTxsPerBatch int
+}
+
+func printVersion(me string) {
+	fmt.Fprintf(os.Stderr, "Harmony (C) 2019. %v, version %v-%v (%v %v)\n", path.Base(me), version, commit, builtBy, builtAt)
+	os.Exit(0)
+}
+
+// The main entrance for the transaction generator program which simulate transactions and send to the network for
+// processing.
+
+var (
+	ip              = flag.String("ip", "127.0.0.1", "IP of the node")
+	port            = flag.String("port", "9999", "port of the node.")
+	numTxns         = flag.Int("numTxns", 100, "number of transactions to send per message")
+	logFolder       = flag.String("log_folder", "latest", "the folder collecting the logs of this execution")
+	duration        = flag.Int("duration", 30, "duration of the tx generation in second. If it's negative, the experiment runs forever.")
+	versionFlag     = flag.Bool("version", false, "Output version info")
+	crossShardRatio = flag.Int("cross_shard_ratio", 30, "The percentage of cross shard transactions.") //Keeping this for backward compatibility
+	shardIDFlag     = flag.Int("shardID", 0, "The shardID the node belongs to.")
+	// Key file to store the private key
+	keyFile = flag.String("key", "./.txgenkey", "the private key file of the txgen")
+	// logging verbosity
+	verbosity = flag.Int("verbosity", 5, "Logging verbosity: 0=silent, 1=error, 2=warn, 3=info, 4=debug, 5=detail (default: 5)")
+)
+
+func setUpTXGen() *node.Node {
+	nodePriKey, _, err := utils.LoadKeyFromFile(*keyFile)
+	if err != nil {
+		panic(err)
+	}
+
+	peerPubKey := bls.RandPrivateKey().GetPublicKey()
+	if peerPubKey == nil {
+		panic(fmt.Errorf("generate key error"))
+	}
+	shardID := *shardIDFlag
+	selfPeer := p2p.Peer{IP: *ip, Port: *port, ConsensusPubKey: peerPubKey}
+
+	// Nodes containing blockchain data to mirror the shards' data in the network
+
+	myhost, err := p2pimpl.NewHost(&selfPeer, nodePriKey)
+	if err != nil {
+		panic("unable to new host in txgen")
+	}
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error :%v \n", err)
+		os.Exit(1)
+	}
+	decider := quorum.NewDecider(quorum.SuperMajorityVote)
+	consensusObj, err := consensus.New(myhost, uint32(shardID), p2p.Peer{}, nil, decider)
+	chainDBFactory := &shardchain.MemDBFactory{}
+	txGen := node.New(myhost, consensusObj, chainDBFactory, false) //Changed it : no longer archival node.
+	txGen.Client = client.NewClient(txGen.GetHost(), uint32(shardID))
+	consensusObj.ChainReader = txGen.Blockchain()
+	genesisShardingConfig := shard.Schedule.InstanceForEpoch(big.NewInt(core.GenesisEpoch))
+	startIdx := 0
+	endIdx := startIdx + genesisShardingConfig.NumNodesPerShard()
+	pubs := []*bls2.PublicKey{}
+	for _, acct := range genesis.HarmonyAccounts[startIdx:endIdx] {
+		pub := &bls2.PublicKey{}
+		if err := pub.DeserializeHexStr(acct.BlsPublicKey); err != nil {
+			fmt.Printf("Can not deserialize public key. err: %v", err)
+			os.Exit(1)
+		}
+		pubs = append(pubs, pub)
+	}
+	consensusObj.Decider.UpdateParticipants(pubs)
+	txGen.NodeConfig.SetRole(nodeconfig.ClientNode)
+	if shardID == 0 {
+		txGen.NodeConfig.SetShardGroupID(nodeconfig.GroupIDBeacon)
+	} else {
+		txGen.NodeConfig.SetShardGroupID(nodeconfig.NewGroupIDByShardID(nodeconfig.ShardID(shardID)))
+	}
+
+	txGen.NodeConfig.SetIsClient(true)
+
+	return txGen
+}
+
+func main() {
+	flag.Var(&utils.BootNodes, "bootnodes", "a list of bootnode multiaddress")
+	flag.Parse()
+	if *versionFlag {
+		printVersion(os.Args[0])
+	}
+	// Logging setup
+	utils.SetLogContext(*port, *ip)
+	utils.SetLogVerbosity(log.Lvl(*verbosity))
+	if len(utils.BootNodes) == 0 {
+		bootNodeAddrs, err := utils.StringsToAddrs(utils.DefaultBootNodeAddrStrings)
+		if err != nil {
+			panic(err)
+		}
+		utils.BootNodes = bootNodeAddrs
+	}
+	// Init with LibP2P enabled, FIXME: (leochen) right now we support only one shard
+	setting := Settings{
+		NumOfAddress:      10000,
+		MaxNumTxsPerBatch: *numTxns,
+	}
+	shardID := *shardIDFlag
+	utils.Logger().Debug().
+		Int("cx ratio", *crossShardRatio).
+		Msg("Cross Shard Ratio Is Set But not used")
+
+	// TODO(Richard): refactor this chuck to a single method
+	// Setup a logger to stdout and log file.
+	logFileName := fmt.Sprintf("./%v/txgen.log", *logFolder)
+	h := log.MultiHandler(
+		log.StreamHandler(os.Stdout, log.TerminalFormat(false)),
+		log.Must.FileHandler(logFileName, log.LogfmtFormat()), // Log to file
+	)
+	log.Root().SetHandler(h)
+	txGen := setUpTXGen()
+	txGen.ServiceManagerSetup()
+	txGen.RunServices()
+	start := time.Now()
+	totalTime := float64(*duration)
+	utils.Logger().Debug().
+		Float64("totalTime", totalTime).
+		Bool("RunForever", isDurationForever(totalTime)).
+		Msg("Total Duration")
+	ticker := time.NewTicker(checkFrequency * time.Second)
+	txGen.DoSyncWithoutConsensus()
+syncLoop:
+	for {
+		t := time.Now()
+		if totalTime > 0 && t.Sub(start).Seconds() >= totalTime {
+			utils.Logger().Debug().
+				Int("duration", (int(t.Sub(start)))).
+				Time("startTime", start).
+				Float64("totalTime", totalTime).
+				Msg("Generator timer ended in syncLoop.")
+			break syncLoop
+		}
+		select {
+		case <-ticker.C:
+			if txGen.State.String() == "NodeReadyForConsensus" {
+				utils.Logger().Debug().
+					Str("txgen node", txGen.SelfPeer.String()).
+					Str("Node State", txGen.State.String()).
+					Msg("Generator is now in Sync.")
+				ticker.Stop()
+				break syncLoop
+			}
+		}
+	}
+	readySignal := make(chan uint32)
+	// This func is used to update the client's blockchain when new blocks are received from the leaders
+	updateBlocksFunc := func(blocks []*types.Block) {
+		utils.Logger().Info().
+			Uint64("block num", blocks[0].NumberU64()).
+			Msg("[Txgen] Received new block")
+		for _, block := range blocks {
+			shardID := block.ShardID()
+			if txGen.Consensus.ShardID == shardID {
+				utils.Logger().Info().
+					Int("txNum", len(block.Transactions())).
+					Uint32("shardID", shardID).
+					Str("preHash", block.ParentHash().Hex()).
+					Uint64("currentBlock", txGen.Blockchain().CurrentBlock().NumberU64()).
+					Uint64("incoming block", block.NumberU64()).
+					Msg("Got block from leader")
+				if block.NumberU64()-txGen.Blockchain().CurrentBlock().NumberU64() == 1 {
+					if err := txGen.AddNewBlock(block); err != nil {
+						utils.Logger().Error().
+							Err(err).
+							Msg("Error when adding new block")
+					}
+					stateMutex.Lock()
+					if err := txGen.Worker.UpdateCurrent(block.Coinbase()); err != nil {
+						utils.Logger().Warn().Err(err).Msg("(*Worker).UpdateCurrent failed")
+					}
+					stateMutex.Unlock()
+					readySignal <- shardID
+				}
+			} else {
+				continue
+			}
+		}
+	}
+	txGen.Client.UpdateBlocks = updateBlocksFunc
+	// Start the client server to listen to leader's message
+	go func() {
+		// wait for 3 seconds for client to send ping message to leader
+		// FIXME (leo) the readySignal should be set once we really sent ping message to leader
+		time.Sleep(1 * time.Second) // wait for nodes to be ready
+		readySignal <- uint32(shardID)
+	}()
+pushLoop:
+	for {
+		t := time.Now()
+		utils.Logger().Debug().
+			Float64("running time", t.Sub(start).Seconds()).
+			Float64("totalTime", totalTime).
+			Msg("Current running time")
+		if !isDurationForever(totalTime) && t.Sub(start).Seconds() >= totalTime {
+			utils.Logger().Debug().
+				Int("duration", (int(t.Sub(start)))).
+				Time("startTime", start).
+				Float64("totalTime", totalTime).
+				Msg("Generator timer ended.")
+			break pushLoop
+		}
+		if shardID != 0 {
+			if otherHeight, flag := txGen.IsSameHeight(); flag {
+				if otherHeight >= 1 {
+					go func() {
+						readySignal <- uint32(shardID)
+						utils.Logger().Debug().Msg("Same blockchain height so readySignal generated")
+						time.Sleep(3 * time.Second) // wait for nodes to be ready
+					}()
+				}
+			}
+		}
+		select {
+		case shardID := <-readySignal:
+			lock := sync.Mutex{}
+			txs, err := GenerateSimulatedTransactionsAccount(uint32(shardID), txGen, setting)
+			if err != nil {
+				utils.Logger().Debug().
+					Err(err).
+					Msg("Error in Generating Txns")
+			}
+			lock.Lock()
+			SendTxsToShard(txGen, txs, uint32(shardID))
+			lock.Unlock()
+		case <-time.After(10 * time.Second):
+			utils.Logger().Warn().Msg("No new block is received so far")
+		}
+	}
+}
+
+// SendTxsToShard sends txs to shard, currently just to beacon shard
+func SendTxsToShard(clientNode *node.Node, txs types.Transactions, shardID uint32) {
+	msg := proto_node.ConstructTransactionListMessageAccount(txs)
+	var err error
+	if shardID == 0 {
+		err = clientNode.GetHost().SendMessageToGroups([]nodeconfig.GroupID{nodeconfig.GroupIDBeaconClient}, p2p_host.ConstructP2pMessage(byte(0), msg))
+	} else {
+		clientGroup := nodeconfig.NewClientGroupIDByShardID(nodeconfig.ShardID(shardID))
+		err = clientNode.GetHost().SendMessageToGroups([]nodeconfig.GroupID{clientGroup}, p2p_host.ConstructP2pMessage(byte(0), msg))
+	}
+	if err != nil {
+		utils.Logger().Debug().
+			Err(err).
+			Msg("Error in Sending Txns")
+	}
+}
+
+// GenerateSimulatedTransactionsAccount generates simulated transaction for account model.
+func GenerateSimulatedTransactionsAccount(shardID uint32, node *node.Node, setting Settings) (types.Transactions, error) {
+	TxnsToGenerate := setting.MaxNumTxsPerBatch // TODO: make use of settings
+	txs := make([]*types.Transaction, TxnsToGenerate)
+	rounds := (TxnsToGenerate / 100)
+	remainder := TxnsToGenerate % 100
+	for i := 0; i < 100; i++ {
+		baseNonce := node.Worker.GetCurrentState().GetNonce(crypto.PubkeyToAddress(node.TestBankKeys[i].PublicKey))
+		for j := 0; j < rounds; j++ {
+			randomUserAddress := crypto.PubkeyToAddress(node.TestBankKeys[rand.Intn(100)].PublicKey)
+			randAmount := rand.Float32()
+			tx, _ := types.SignTx(types.NewTransaction(baseNonce+uint64(j), randomUserAddress, shardID, big.NewInt(int64(denominations.One*randAmount)), params.TxGas, nil, nil), types.HomesteadSigner{}, node.TestBankKeys[i])
+			txs[100*j+i] = tx
+		}
+		if i < remainder {
+			randomUserAddress := crypto.PubkeyToAddress(node.TestBankKeys[rand.Intn(100)].PublicKey)
+			randAmount := rand.Float32()
+			tx, _ := types.SignTx(types.NewTransaction(baseNonce+uint64(rounds), randomUserAddress, shardID, big.NewInt(int64(denominations.One*randAmount)), params.TxGas, nil, nil), types.HomesteadSigner{}, node.TestBankKeys[i])
+			txs[100*rounds+i] = tx
+		}
+	}
+	return txs, nil
+}
+
+func isDurationForever(duration float64) bool {
+	return duration <= 0
+}
--- a/cmd/harmony/main.go
+++ b/cmd/harmony/main.go
@ -0,0 +1,517 @@
+package main
+
+import (
+	"encoding/hex"
+	"flag"
+	"fmt"
+	"math/big"
+	"math/rand"
+	"os"
+	"path"
+	"runtime"
+	"strconv"
+	"time"
+
+	ethCommon "github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/ethdb"
+	"github.com/ethereum/go-ethereum/log"
+	"github.com/harmony-one/bls/ffi/go/bls"
+	"github.com/harmony-one/harmony/api/service/syncing"
+	"github.com/harmony-one/harmony/consensus"
+	"github.com/harmony-one/harmony/consensus/quorum"
+	"github.com/harmony-one/harmony/core"
+	"github.com/harmony-one/harmony/internal/blsgen"
+	"github.com/harmony-one/harmony/internal/common"
+	nodeconfig "github.com/harmony-one/harmony/internal/configs/node"
+	shardingconfig "github.com/harmony-one/harmony/internal/configs/sharding"
+	"github.com/harmony-one/harmony/internal/genesis"
+	hmykey "github.com/harmony-one/harmony/internal/keystore"
+	"github.com/harmony-one/harmony/internal/memprofiling"
+	"github.com/harmony-one/harmony/internal/shardchain"
+	"github.com/harmony-one/harmony/internal/utils"
+	"github.com/harmony-one/harmony/node"
+	"github.com/harmony-one/harmony/p2p"
+	"github.com/harmony-one/harmony/p2p/p2pimpl"
+	"github.com/harmony-one/harmony/shard"
+)
+
+// Version string variables
+var (
+	version string
+	builtBy string
+	builtAt string
+	commit  string
+)
+
+// Host
+var (
+	myHost p2p.Host
+)
+
+// InitLDBDatabase initializes a LDBDatabase. isGenesis=true will return the beacon chain database for normal shard nodes
+func InitLDBDatabase(ip string, port string, freshDB bool, isBeacon bool) (*ethdb.LDBDatabase, error) {
+	var dbFileName string
+	if isBeacon {
+		dbFileName = fmt.Sprintf("./db/harmony_beacon_%s_%s", ip, port)
+	} else {
+		dbFileName = fmt.Sprintf("./db/harmony_%s_%s", ip, port)
+	}
+	if freshDB {
+		var err = os.RemoveAll(dbFileName)
+		if err != nil {
+			fmt.Println(err.Error())
+		}
+	}
+	return ethdb.NewLDBDatabase(dbFileName, 0, 0)
+}
+
+func printVersion() {
+	fmt.Fprintln(os.Stderr, nodeconfig.GetVersion())
+	os.Exit(0)
+}
+
+var (
+	ip               = flag.String("ip", "127.0.0.1", "ip of the node")
+	port             = flag.String("port", "9000", "port of the node.")
+	logFolder        = flag.String("log_folder", "latest", "the folder collecting the logs of this execution")
+	logMaxSize       = flag.Int("log_max_size", 100, "the max size in megabytes of the log file before it gets rotated")
+	freshDB          = flag.Bool("fresh_db", false, "true means the existing disk based db will be removed")
+	profile          = flag.Bool("profile", false, "Turn on profiling (CPU, Memory).")
+	metricsReportURL = flag.String("metrics_report_url", "", "If set, reports metrics to this URL.")
+	versionFlag      = flag.Bool("version", false, "Output version info")
+	onlyLogTps       = flag.Bool("only_log_tps", false, "Only log TPS if true")
+	dnsZone          = flag.String("dns_zone", "", "if given and not empty, use peers from the zone (default: use libp2p peer discovery instead)")
+	dnsFlag          = flag.Bool("dns", true, "[deprecated] equivalent to -dns_zone t.hmny.io")
+	//Leader needs to have a minimal number of peers to start consensus
+	minPeers = flag.Int("min_peers", 32, "Minimal number of Peers in shard")
+	// Key file to store the private key
+	keyFile = flag.String("key", "./.hmykey", "the p2p key file of the harmony node")
+	// isGenesis indicates this node is a genesis node
+	isGenesis = flag.Bool("is_genesis", true, "true means this node is a genesis node")
+	// isArchival indicates this node is an archival node that will save and archive current blockchain
+	isArchival = flag.Bool("is_archival", true, "false makes node faster by turning caching off")
+	// delayCommit is the commit-delay timer, used by Harmony nodes
+	delayCommit = flag.String("delay_commit", "0ms", "how long to delay sending commit messages in consensus, ex: 500ms, 1s")
+	// nodeType indicates the type of the node: validator, explorer
+	nodeType = flag.String("node_type", "validator", "node type: validator, explorer")
+	// networkType indicates the type of the network
+	networkType = flag.String("network_type", "mainnet", "type of the network: mainnet, testnet, devnet, localnet")
+	// syncFreq indicates sync frequency
+	syncFreq = flag.Int("sync_freq", 60, "unit in seconds")
+	// beaconSyncFreq indicates beaconchain sync frequency
+	beaconSyncFreq = flag.Int("beacon_sync_freq", 60, "unit in seconds")
+	// blockPeriod indicates the how long the leader waits to propose a new block.
+	blockPeriod    = flag.Int("block_period", 8, "how long in second the leader waits to propose a new block.")
+	leaderOverride = flag.Bool("leader_override", false, "true means override the default leader role and acts as validator")
+	// shardID indicates the shard ID of this node
+	shardID            = flag.Int("shard_id", -1, "the shard ID of this node")
+	enableMemProfiling = flag.Bool("enableMemProfiling", false, "Enable memsize logging.")
+	enableGC           = flag.Bool("enableGC", true, "Enable calling garbage collector manually .")
+	blsKeyFile         = flag.String("blskey_file", "", "The encrypted file of bls serialized private key by passphrase.")
+	blsPass            = flag.String("blspass", "", "The file containing passphrase to decrypt the encrypted bls file.")
+	blsPassphrase      string
+	// Sharding configuration parameters for devnet
+	devnetNumShards   = flag.Uint("dn_num_shards", 2, "number of shards for -network_type=devnet (default: 2)")
+	devnetShardSize   = flag.Int("dn_shard_size", 10, "number of nodes per shard for -network_type=devnet (default 10)")
+	devnetHarmonySize = flag.Int("dn_hmy_size", -1, "number of Harmony-operated nodes per shard for -network_type=devnet; negative (default) means equal to -dn_shard_size")
+	// logConn logs incoming/outgoing connections
+	logConn        = flag.Bool("log_conn", false, "log incoming/outgoing connections")
+	keystoreDir    = flag.String("keystore", hmykey.DefaultKeyStoreDir, "The default keystore directory")
+	initialAccount = &genesis.DeployAccount{}
+	// logging verbosity
+	verbosity = flag.Int("verbosity", 5, "Logging verbosity: 0=silent, 1=error, 2=warn, 3=info, 4=debug, 5=detail (default: 5)")
+	// dbDir is the database directory.
+	dbDir = flag.String("db_dir", "", "blockchain database directory")
+	// Disable view change.
+	disableViewChange = flag.Bool("disable_view_change", false, "Do not propose view change (testing only)")
+	// metrics flag to collct meetrics or not, pushgateway ip and port for metrics
+	metricsFlag     = flag.Bool("metrics", false, "Collect and upload node metrics")
+	pushgatewayIP   = flag.String("pushgateway_ip", "grafana.harmony.one", "Metrics view ip")
+	pushgatewayPort = flag.String("pushgateway_port", "9091", "Metrics view port")
+	publicRPC       = flag.Bool("public_rpc", false, "Enable Public RPC Access (default: false)")
+)
+
+func initSetup() {
+
+	// maybe request passphrase for bls key.
+	passphraseForBls()
+
+	// Configure log parameters
+	utils.SetLogContext(*port, *ip)
+	utils.SetLogVerbosity(log.Lvl(*verbosity))
+	utils.AddLogFile(fmt.Sprintf("%v/validator-%v-%v.log", *logFolder, *ip, *port), *logMaxSize)
+
+	if *onlyLogTps {
+		matchFilterHandler := log.MatchFilterHandler("msg", "TPS Report", utils.GetLogInstance().GetHandler())
+		utils.GetLogInstance().SetHandler(matchFilterHandler)
+	}
+
+	// Add GOMAXPROCS to achieve max performance.
+	runtime.GOMAXPROCS(runtime.NumCPU() * 4)
+
+	// Set port and ip to global config.
+	nodeconfig.GetDefaultConfig().Port = *port
+	nodeconfig.GetDefaultConfig().IP = *ip
+
+	// Setup mem profiling.
+	memprofiling.GetMemProfiling().Config()
+
+	// Set default keystore Dir
+	hmykey.DefaultKeyStoreDir = *keystoreDir
+
+	// Set up randomization seed.
+	rand.Seed(int64(time.Now().Nanosecond()))
+
+	if len(utils.BootNodes) == 0 {
+		bootNodeAddrs, err := utils.StringsToAddrs(utils.DefaultBootNodeAddrStrings)
+		if err != nil {
+			panic(err)
+		}
+		utils.BootNodes = bootNodeAddrs
+	}
+}
+
+func passphraseForBls() {
+	// If FN node running, they should either specify blsPrivateKey or the file with passphrase
+	// However, explorer or non-validator nodes need no blskey
+	if *nodeType != "validator" {
+		return
+	}
+
+	if *blsKeyFile == "" || *blsPass == "" {
+		fmt.Println("Internal nodes need to have pass to decrypt blskey")
+		os.Exit(101)
+	}
+	passphrase, err := utils.GetPassphraseFromSource(*blsPass)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "ERROR when reading passphrase file: %v\n", err)
+		os.Exit(100)
+	}
+	blsPassphrase = passphrase
+}
+
+func setupInitialAccount() (isLeader bool) {
+	genesisShardingConfig := shard.Schedule.InstanceForEpoch(big.NewInt(core.GenesisEpoch))
+	pubKey := setupConsensusKey(nodeconfig.GetDefaultConfig())
+
+	reshardingEpoch := genesisShardingConfig.ReshardingEpoch()
+	if reshardingEpoch != nil && len(reshardingEpoch) > 0 {
+		for _, epoch := range reshardingEpoch {
+			config := shard.Schedule.InstanceForEpoch(epoch)
+			isLeader, initialAccount = config.FindAccount(pubKey.SerializeToHexStr())
+			if initialAccount != nil {
+				break
+			}
+		}
+	} else {
+		isLeader, initialAccount = genesisShardingConfig.FindAccount(pubKey.SerializeToHexStr())
+	}
+
+	if initialAccount == nil {
+		fmt.Fprintf(os.Stderr, "ERROR cannot find your BLS key in the genesis/FN tables: %s\n", pubKey.SerializeToHexStr())
+		os.Exit(100)
+	}
+
+	fmt.Printf("My Genesis Account: %v\n", *initialAccount)
+
+	return isLeader
+}
+
+func setupConsensusKey(nodeConfig *nodeconfig.ConfigType) *bls.PublicKey {
+	consensusPriKey, err := blsgen.LoadBlsKeyWithPassPhrase(*blsKeyFile, blsPassphrase)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "ERROR when loading bls key, err :%v\n", err)
+		os.Exit(100)
+	}
+	pubKey := consensusPriKey.GetPublicKey()
+
+	// Consensus keys are the BLS12-381 keys used to sign consensus messages
+	nodeConfig.ConsensusPriKey, nodeConfig.ConsensusPubKey = consensusPriKey, consensusPriKey.GetPublicKey()
+	if nodeConfig.ConsensusPriKey == nil || nodeConfig.ConsensusPubKey == nil {
+		fmt.Println("error to get consensus keys.")
+		os.Exit(100)
+	}
+	return pubKey
+}
+
+func createGlobalConfig() *nodeconfig.ConfigType {
+	var err error
+
+	nodeConfig := nodeconfig.GetShardConfig(initialAccount.ShardID)
+	if *nodeType == "validator" {
+		// Set up consensus keys.
+		setupConsensusKey(nodeConfig)
+	} else {
+		nodeConfig.ConsensusPriKey = &bls.SecretKey{} // set dummy bls key for consensus object
+	}
+
+	// Set network type
+	netType := nodeconfig.NetworkType(*networkType)
+	switch netType {
+	case nodeconfig.Mainnet, nodeconfig.Testnet, nodeconfig.Pangaea, nodeconfig.Localnet, nodeconfig.Devnet:
+		nodeconfig.SetNetworkType(netType)
+	default:
+		panic(fmt.Sprintf("invalid network type: %s", *networkType))
+	}
+
+	nodeConfig.SetPushgatewayIP(*pushgatewayIP)
+	nodeConfig.SetPushgatewayPort(*pushgatewayPort)
+	nodeConfig.SetMetricsFlag(*metricsFlag)
+
+	// P2p private key is used for secure message transfer between p2p nodes.
+	nodeConfig.P2pPriKey, _, err = utils.LoadKeyFromFile(*keyFile)
+	if err != nil {
+		panic(err)
+	}
+
+	selfPeer := p2p.Peer{IP: *ip, Port: *port, ConsensusPubKey: nodeConfig.ConsensusPubKey}
+
+	myHost, err = p2pimpl.NewHost(&selfPeer, nodeConfig.P2pPriKey)
+	if *logConn && nodeConfig.GetNetworkType() != nodeconfig.Mainnet {
+		myHost.GetP2PHost().Network().Notify(utils.NewConnLogger(utils.GetLogger()))
+	}
+	if err != nil {
+		panic("unable to new host in harmony")
+	}
+
+	nodeConfig.DBDir = *dbDir
+
+	return nodeConfig
+}
+
+func setupConsensusAndNode(nodeConfig *nodeconfig.ConfigType) *node.Node {
+	// Consensus object.
+	// TODO: consensus object shouldn't start here
+	// TODO(minhdoan): During refactoring, found out that the peers list is actually empty. Need to clean up the logic of consensus later.
+	decider := quorum.NewDecider(quorum.SuperMajorityVote)
+	currentConsensus, err := consensus.New(
+		myHost, nodeConfig.ShardID, p2p.Peer{}, nodeConfig.ConsensusPriKey, decider,
+	)
+	currentConsensus.Decider.SetShardIDProvider(func() (uint32, error) {
+		return currentConsensus.ShardID, nil
+	})
+	currentConsensus.SelfAddress = common.ParseAddr(initialAccount.Address)
+
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error :%v \n", err)
+		os.Exit(1)
+	}
+	commitDelay, err := time.ParseDuration(*delayCommit)
+	if err != nil || commitDelay < 0 {
+		_, _ = fmt.Fprintf(os.Stderr, "ERROR invalid commit delay %#v", *delayCommit)
+		os.Exit(1)
+	}
+	currentConsensus.SetCommitDelay(commitDelay)
+	currentConsensus.MinPeers = *minPeers
+
+	if *disableViewChange {
+		currentConsensus.DisableViewChangeForTestingOnly()
+	}
+
+	// Current node.
+	chainDBFactory := &shardchain.LDBFactory{RootDir: nodeConfig.DBDir}
+	currentNode := node.New(myHost, currentConsensus, chainDBFactory, *isArchival)
+
+	switch {
+	case *networkType == nodeconfig.Localnet:
+		epochConfig := shard.Schedule.InstanceForEpoch(ethCommon.Big0)
+		selfPort, err := strconv.ParseUint(*port, 10, 16)
+		if err != nil {
+			utils.Logger().Fatal().
+				Err(err).
+				Str("self_port_string", *port).
+				Msg("cannot convert self port string into port number")
+		}
+		currentNode.SyncingPeerProvider = node.NewLocalSyncingPeerProvider(
+			6000, uint16(selfPort), epochConfig.NumShards(), uint32(epochConfig.NumNodesPerShard()))
+	case *dnsZone != "":
+		currentNode.SyncingPeerProvider = node.NewDNSSyncingPeerProvider(*dnsZone, syncing.GetSyncingPort(*port))
+	case *dnsFlag:
+		currentNode.SyncingPeerProvider = node.NewDNSSyncingPeerProvider("t.hmny.io", syncing.GetSyncingPort(*port))
+	default:
+		currentNode.SyncingPeerProvider = node.NewLegacySyncingPeerProvider(currentNode)
+
+	}
+
+	// TODO: refactor the creation of blockchain out of node.New()
+	currentConsensus.ChainReader = currentNode.Blockchain()
+
+	// Set up prometheus pushgateway for metrics monitoring serivce.
+	currentNode.NodeConfig.SetPushgatewayIP(nodeConfig.PushgatewayIP)
+	currentNode.NodeConfig.SetPushgatewayPort(nodeConfig.PushgatewayPort)
+	currentNode.NodeConfig.SetMetricsFlag(nodeConfig.MetricsFlag)
+
+	currentNode.NodeConfig.SetBeaconGroupID(nodeconfig.NewGroupIDByShardID(0))
+
+	switch *nodeType {
+	case "explorer":
+		currentNode.NodeConfig.SetRole(nodeconfig.ExplorerNode)
+		currentNode.NodeConfig.SetShardGroupID(nodeconfig.NewGroupIDByShardID(nodeconfig.ShardID(*shardID)))
+		currentNode.NodeConfig.SetClientGroupID(nodeconfig.NewClientGroupIDByShardID(nodeconfig.ShardID(*shardID)))
+	case "validator":
+		currentNode.NodeConfig.SetRole(nodeconfig.Validator)
+		if nodeConfig.ShardID == shard.BeaconChainShardID {
+			currentNode.NodeConfig.SetShardGroupID(nodeconfig.NewGroupIDByShardID(shard.BeaconChainShardID))
+			currentNode.NodeConfig.SetClientGroupID(nodeconfig.NewClientGroupIDByShardID(shard.BeaconChainShardID))
+		} else {
+			currentNode.NodeConfig.SetShardGroupID(nodeconfig.NewGroupIDByShardID(nodeconfig.ShardID(nodeConfig.ShardID)))
+			currentNode.NodeConfig.SetClientGroupID(nodeconfig.NewClientGroupIDByShardID(nodeconfig.ShardID(nodeConfig.ShardID)))
+		}
+	}
+	currentNode.NodeConfig.ConsensusPubKey = nodeConfig.ConsensusPubKey
+	currentNode.NodeConfig.ConsensusPriKey = nodeConfig.ConsensusPriKey
+
+	// Setup block period for currentNode.
+	currentNode.BlockPeriod = time.Duration(*blockPeriod) * time.Second
+
+	// TODO: Disable drand. Currently drand isn't functioning but we want to compeletely turn it off for full protection.
+	// Enable it back after mainnet.
+	// dRand := drand.New(nodeConfig.Host, nodeConfig.ShardID, []p2p.Peer{}, nodeConfig.Leader, currentNode.ConfirmedBlockChannel, nodeConfig.ConsensusPriKey)
+	// currentNode.Consensus.RegisterPRndChannel(dRand.PRndChannel)
+	// currentNode.Consensus.RegisterRndChannel(dRand.RndChannel)
+	// currentNode.DRand = dRand
+
+	// This needs to be executed after consensus and drand are setup
+	if err := currentNode.InitConsensusWithValidators(); err != nil {
+		utils.Logger().Warn().
+			Int("shardID", *shardID).
+			Err(err).
+			Msg("InitConsensusWithMembers failed")
+	}
+
+	// Set the consensus ID to be the current block number
+	viewID := currentNode.Blockchain().CurrentBlock().Header().ViewID().Uint64()
+	currentConsensus.SetViewID(viewID)
+	utils.Logger().Info().
+		Uint64("viewID", viewID).
+		Msg("Init Blockchain")
+
+	// Assign closure functions to the consensus object
+	currentConsensus.BlockVerifier = currentNode.VerifyNewBlock
+	currentConsensus.OnConsensusDone = currentNode.PostConsensusProcessing
+	currentNode.State = node.NodeWaitToJoin
+
+	// update consensus information based on the blockchain
+	mode := currentConsensus.UpdateConsensusInformation()
+	currentConsensus.SetMode(mode)
+
+	// Watching currentNode and currentConsensus.
+	memprofiling.GetMemProfiling().Add("currentNode", currentNode)
+	memprofiling.GetMemProfiling().Add("currentConsensus", currentConsensus)
+	return currentNode
+}
+
+func main() {
+	flag.Var(&utils.BootNodes, "bootnodes", "a list of bootnode multiaddress (delimited by ,)")
+	flag.Parse()
+
+	switch *nodeType {
+	case "validator":
+	case "explorer":
+		break
+	default:
+		fmt.Fprintf(os.Stderr, "Unknown node type: %s\n", *nodeType)
+		os.Exit(1)
+	}
+
+	nodeconfig.SetPublicRPC(*publicRPC)
+	nodeconfig.SetVersion(fmt.Sprintf("Harmony (C) 2019. %v, version %v-%v (%v %v)", path.Base(os.Args[0]), version, commit, builtBy, builtAt))
+	if *versionFlag {
+		printVersion()
+	}
+
+	switch *networkType {
+	case nodeconfig.Mainnet:
+		shard.Schedule = shardingconfig.MainnetSchedule
+	case nodeconfig.Testnet:
+		shard.Schedule = shardingconfig.TestnetSchedule
+	case nodeconfig.Pangaea:
+		shard.Schedule = shardingconfig.PangaeaSchedule
+	case nodeconfig.Localnet:
+		shard.Schedule = shardingconfig.LocalnetSchedule
+	case nodeconfig.Devnet:
+		if *devnetHarmonySize < 0 {
+			*devnetHarmonySize = *devnetShardSize
+		}
+		// TODO (leo): use a passing list of accounts here
+		devnetConfig, err := shardingconfig.NewInstance(
+			uint32(*devnetNumShards), *devnetShardSize, *devnetHarmonySize, genesis.HarmonyAccounts, genesis.FoundationalNodeAccounts, nil)
+		if err != nil {
+			_, _ = fmt.Fprintf(os.Stderr, "ERROR invalid devnet sharding config: %s",
+				err)
+			os.Exit(1)
+		}
+		shard.Schedule = shardingconfig.NewFixedSchedule(devnetConfig)
+	}
+
+	initSetup()
+
+	// Set up manual call for garbage collection.
+	if *enableGC {
+		memprofiling.MaybeCallGCPeriodically()
+	}
+
+	if *nodeType == "validator" {
+		setupInitialAccount()
+	}
+
+	if *shardID >= 0 {
+		utils.Logger().Info().
+			Uint32("original", initialAccount.ShardID).
+			Int("override", *shardID).
+			Msg("ShardID Override")
+		initialAccount.ShardID = uint32(*shardID)
+	}
+
+	nodeConfig := createGlobalConfig()
+	currentNode := setupConsensusAndNode(nodeConfig)
+	//setup state syncing and beacon syncing frequency
+	currentNode.SetSyncFreq(*syncFreq)
+	currentNode.SetBeaconSyncFreq(*beaconSyncFreq)
+
+	if nodeConfig.ShardID != shard.BeaconChainShardID && currentNode.NodeConfig.Role() != nodeconfig.ExplorerNode {
+		utils.Logger().Info().Uint32("shardID", currentNode.Blockchain().ShardID()).Uint32("shardID", nodeConfig.ShardID).Msg("SupportBeaconSyncing")
+		go currentNode.SupportBeaconSyncing()
+	}
+
+	startMsg := "==== New Harmony Node ===="
+	if *nodeType == "explorer" {
+		startMsg = "==== New Explorer Node ===="
+	}
+
+	utils.Logger().Info().
+		Str("BlsPubKey", hex.EncodeToString(nodeConfig.ConsensusPubKey.Serialize())).
+		Uint32("ShardID", nodeConfig.ShardID).
+		Str("ShardGroupID", nodeConfig.GetShardGroupID().String()).
+		Str("BeaconGroupID", nodeConfig.GetBeaconGroupID().String()).
+		Str("ClientGroupID", nodeConfig.GetClientGroupID().String()).
+		Str("Role", currentNode.NodeConfig.Role().String()).
+		Str("multiaddress", fmt.Sprintf("/ip4/%s/tcp/%s/p2p/%s", *ip, *port, myHost.GetID().Pretty())).
+		Msg(startMsg)
+
+	if *enableMemProfiling {
+		memprofiling.GetMemProfiling().Start()
+	}
+	go currentNode.SupportSyncing()
+	currentNode.ServiceManagerSetup()
+
+	currentNode.RunServices()
+	// RPC for SDK not supported for mainnet.
+	if err := currentNode.StartRPC(*port); err != nil {
+		utils.Logger().Warn().
+			Err(err).
+			Msg("StartRPC failed")
+	}
+
+	// Run additional node collectors
+	// Collect node metrics if metrics flag is set
+	if currentNode.NodeConfig.GetMetricsFlag() {
+		go currentNode.CollectMetrics()
+	}
+	// Commit committtee if node role is explorer
+	if currentNode.NodeConfig.Role() == nodeconfig.ExplorerNode {
+		go currentNode.CommitCommittee()
+	}
+
+	currentNode.StartServer()
+}
--- a/node/node.go
+++ b/node/node.go
@ -0,0 +1,685 @@
+package node
+
+import (
+	"crypto/ecdsa"
+	"fmt"
+	"sync"
+	"time"
+
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/harmony-one/harmony/accounts"
+	"github.com/harmony-one/harmony/api/client"
+	clientService "github.com/harmony-one/harmony/api/client/service"
+	msg_pb "github.com/harmony-one/harmony/api/proto/message"
+	proto_node "github.com/harmony-one/harmony/api/proto/node"
+	"github.com/harmony-one/harmony/api/service"
+	"github.com/harmony-one/harmony/api/service/syncing"
+	"github.com/harmony-one/harmony/api/service/syncing/downloader"
+	"github.com/harmony-one/harmony/block"
+	"github.com/harmony-one/harmony/consensus"
+	"github.com/harmony-one/harmony/consensus/reward"
+	"github.com/harmony-one/harmony/contracts"
+	"github.com/harmony-one/harmony/core"
+	"github.com/harmony-one/harmony/core/types"
+	"github.com/harmony-one/harmony/drand"
+	"github.com/harmony-one/harmony/internal/chain"
+	nodeconfig "github.com/harmony-one/harmony/internal/configs/node"
+	"github.com/harmony-one/harmony/internal/ctxerror"
+	"github.com/harmony-one/harmony/internal/params"
+	"github.com/harmony-one/harmony/internal/shardchain"
+	"github.com/harmony-one/harmony/internal/utils"
+	"github.com/harmony-one/harmony/msgq"
+	"github.com/harmony-one/harmony/node/worker"
+	"github.com/harmony-one/harmony/p2p"
+	p2p_host "github.com/harmony-one/harmony/p2p/host"
+	"github.com/harmony-one/harmony/shard"
+	"github.com/harmony-one/harmony/shard/committee"
+	staking "github.com/harmony-one/harmony/staking/types"
+)
+
+// State is a state of a node.
+type State byte
+
+// All constants except the NodeLeader below are for validators only.
+const (
+	NodeInit              State = iota // Node just started, before contacting BeaconChain
+	NodeWaitToJoin                     // Node contacted BeaconChain, wait to join Shard
+	NodeNotInSync                      // Node out of sync, might be just joined Shard or offline for a period of time
+	NodeOffline                        // Node is offline
+	NodeReadyForConsensus              // Node is ready for doing consensus
+	NodeDoingConsensus                 // Node is already doing consensus
+	NodeLeader                         // Node is the leader of some shard.
+)
+
+const (
+	// TxPoolLimit is the limit of transaction pool.
+	TxPoolLimit = 20000
+	// NumTryBroadCast is the number of times trying to broadcast
+	NumTryBroadCast = 3
+	// ClientRxQueueSize is the number of client messages to queue before tail-dropping.
+	ClientRxQueueSize = 16384
+	// ShardRxQueueSize is the number of shard messages to queue before tail-dropping.
+	ShardRxQueueSize = 16384
+	// GlobalRxQueueSize is the number of global messages to queue before tail-dropping.
+	GlobalRxQueueSize = 16384
+	// ClientRxWorkers is the number of concurrent client message handlers.
+	ClientRxWorkers = 8
+	// ShardRxWorkers is the number of concurrent shard message handlers.
+	ShardRxWorkers = 32
+	// GlobalRxWorkers is the number of concurrent global message handlers.
+	GlobalRxWorkers = 32
+)
+
+func (state State) String() string {
+	switch state {
+	case NodeInit:
+		return "NodeInit"
+	case NodeWaitToJoin:
+		return "NodeWaitToJoin"
+	case NodeNotInSync:
+		return "NodeNotInSync"
+	case NodeOffline:
+		return "NodeOffline"
+	case NodeReadyForConsensus:
+		return "NodeReadyForConsensus"
+	case NodeDoingConsensus:
+		return "NodeDoingConsensus"
+	case NodeLeader:
+		return "NodeLeader"
+	}
+	return "Unknown"
+}
+
+const (
+	maxBroadcastNodes       = 10              // broadcast at most maxBroadcastNodes peers that need in sync
+	broadcastTimeout  int64 = 60 * 1000000000 // 1 mins
+	//SyncIDLength is the length of bytes for syncID
+	SyncIDLength = 20
+)
+
+// use to push new block to outofsync node
+type syncConfig struct {
+	timestamp int64
+	client    *downloader.Client
+}
+
+// Node represents a protocol-participating node in the network
+type Node struct {
+	Consensus             *consensus.Consensus // Consensus object containing all Consensus related data (e.g. committee members, signatures, commits)
+	BlockChannel          chan *types.Block    // The channel to send newly proposed blocks
+	ConfirmedBlockChannel chan *types.Block    // The channel to send confirmed blocks
+	BeaconBlockChannel    chan *types.Block    // The channel to send beacon blocks for non-beaconchain nodes
+	DRand                 *drand.DRand         // The instance for distributed randomness protocol
+	pendingCrossLinks     []*block.Header
+	pendingClMutex        sync.Mutex
+
+	pendingCXReceipts map[string]*types.CXReceiptsProof // All the receipts received but not yet processed for Consensus
+	pendingCXMutex    sync.Mutex
+
+	// Shard databases
+	shardChains shardchain.Collection
+
+	Client   *client.Client // The presence of a client object means this node will also act as a client
+	SelfPeer p2p.Peer       // TODO(minhdoan): it could be duplicated with Self below whose is Alok work.
+	BCPeers  []p2p.Peer     // list of Beacon Chain Peers.  This is needed by all nodes.
+
+	// TODO: Neighbors should store only neighbor nodes in the same shard
+	Neighbors  sync.Map   // All the neighbor nodes, key is the sha256 of Peer IP/Port, value is the p2p.Peer
+	numPeers   int        // Number of Peers
+	State      State      // State of the Node
+	stateMutex sync.Mutex // mutex for change node state
+
+	// BeaconNeighbors store only neighbor nodes in the beacon chain shard
+	BeaconNeighbors sync.Map // All the neighbor nodes, key is the sha256 of Peer IP/Port, value is the p2p.Peer
+
+	TxPool *core.TxPool // TODO migrate to TxPool from pendingTransactions list below
+
+	CxPool *core.CxPool // pool for missing cross shard receipts resend
+
+	pendingTransactions map[common.Hash]*types.Transaction // All the transactions received but not yet processed for Consensus
+	pendingTxMutex      sync.Mutex
+	recentTxsStats      types.RecentTxsStats
+
+	pendingStakingTransactions map[common.Hash]*staking.StakingTransaction // All the staking transactions received but not yet processed for Consensus
+	pendingStakingTxMutex      sync.Mutex
+
+	Worker       *worker.Worker
+	BeaconWorker *worker.Worker // worker for beacon chain
+
+	// Client server (for wallet requests)
+	clientServer *clientService.Server
+
+	// Syncing component.
+	syncID                 [SyncIDLength]byte // a unique ID for the node during the state syncing process with peers
+	downloaderServer       *downloader.Server
+	stateSync              *syncing.StateSync
+	beaconSync             *syncing.StateSync
+	peerRegistrationRecord map[string]*syncConfig // record registration time (unixtime) of peers begin in syncing
+	SyncingPeerProvider    SyncingPeerProvider
+
+	// syncing frequency parameters
+	syncFreq       int
+	beaconSyncFreq int
+
+	// The p2p host used to send/receive p2p messages
+	host p2p.Host
+
+	// Incoming messages to process.
+	clientRxQueue *msgq.Queue
+	shardRxQueue  *msgq.Queue
+	globalRxQueue *msgq.Queue
+
+	// Service manager.
+	serviceManager *service.Manager
+
+	// Demo account.
+	DemoContractAddress      common.Address
+	LotteryManagerPrivateKey *ecdsa.PrivateKey
+
+	// Puzzle account.
+	PuzzleContractAddress   common.Address
+	PuzzleManagerPrivateKey *ecdsa.PrivateKey
+
+	// For test only; TODO ek – remove this
+	TestBankKeys []*ecdsa.PrivateKey
+
+	ContractDeployerKey          *ecdsa.PrivateKey
+	ContractDeployerCurrentNonce uint64 // The nonce of the deployer contract at current block
+	ContractAddresses            []common.Address
+
+	// For puzzle contracts
+	AddressNonce sync.Map
+
+	// Shard group Message Receiver
+	shardGroupReceiver p2p.GroupReceiver
+
+	// Global group Message Receiver, communicate with beacon chain, or cross-shard TX
+	globalGroupReceiver p2p.GroupReceiver
+
+	// Client Message Receiver to handle light client messages
+	// Beacon leader needs to use this receiver to talk to new node
+	clientReceiver p2p.GroupReceiver
+
+	// Duplicated Ping Message Received
+	duplicatedPing sync.Map
+
+	// Channel to notify consensus service to really start consensus
+	startConsensus chan struct{}
+
+	// node configuration, including group ID, shard ID, etc
+	NodeConfig *nodeconfig.ConfigType
+
+	// Chain configuration.
+	chainConfig params.ChainConfig
+
+	// map of service type to its message channel.
+	serviceMessageChan map[service.Type]chan *msg_pb.Message
+
+	// Used to call smart contract locally
+	ContractCaller *contracts.ContractCaller
+
+	accountManager *accounts.Manager
+
+	// Next shard state
+	nextShardState struct {
+		// The received master shard state
+		master *shard.EpochShardState
+
+		// When for a leader to propose the next shard state,
+		// or for a validator to wait for a proposal before view change.
+		// TODO ek – replace with retry-based logic instead of delay
+		proposeTime time.Time
+	}
+
+	isFirstTime bool // the node was started with a fresh database
+	// How long in second the leader needs to wait to propose a new block.
+	BlockPeriod time.Duration
+
+	// last time consensus reached for metrics
+	lastConsensusTime int64
+}
+
+// Blockchain returns the blockchain for the node's current shard.
+func (node *Node) Blockchain() *core.BlockChain {
+	shardID := node.NodeConfig.ShardID
+	bc, err := node.shardChains.ShardChain(shardID)
+	if err != nil {
+		utils.Logger().Error().
+			Uint32("shardID", shardID).
+			Err(err).
+			Msg("cannot get shard chain")
+	}
+	return bc
+}
+
+// Beaconchain returns the beaconchain from node.
+func (node *Node) Beaconchain() *core.BlockChain {
+	bc, err := node.shardChains.ShardChain(0)
+	if err != nil {
+		utils.Logger().Error().Err(err).Msg("cannot get beaconchain")
+	}
+	return bc
+}
+
+func (node *Node) tryBroadcast(tx *types.Transaction) {
+	msg := proto_node.ConstructTransactionListMessageAccount(types.Transactions{tx})
+
+	shardGroupID := nodeconfig.NewGroupIDByShardID(nodeconfig.ShardID(tx.ShardID()))
+	utils.Logger().Info().Str("shardGroupID", string(shardGroupID)).Msg("tryBroadcast")
+
+	for attempt := 0; attempt < NumTryBroadCast; attempt++ {
+		if err := node.host.SendMessageToGroups([]nodeconfig.GroupID{shardGroupID}, p2p_host.ConstructP2pMessage(byte(0), msg)); err != nil && attempt < NumTryBroadCast {
+			utils.Logger().Error().Int("attempt", attempt).Msg("Error when trying to broadcast tx")
+		} else {
+			break
+		}
+	}
+}
+
+// Add new transactions to the pending transaction list.
+func (node *Node) addPendingTransactions(newTxs types.Transactions) {
+	txPoolLimit := shard.Schedule.MaxTxPoolSizeLimit()
+	node.pendingTxMutex.Lock()
+	for _, tx := range newTxs {
+		if _, ok := node.pendingTransactions[tx.Hash()]; !ok {
+			node.pendingTransactions[tx.Hash()] = tx
+		}
+		if len(node.pendingTransactions) > txPoolLimit {
+			break
+		}
+	}
+	node.pendingTxMutex.Unlock()
+	utils.Logger().Info().Int("length of newTxs", len(newTxs)).Int("totalPending", len(node.pendingTransactions)).Msg("Got more transactions")
+}
+
+// Add new staking transactions to the pending staking transaction list.
+func (node *Node) addPendingStakingTransactions(newStakingTxs staking.StakingTransactions) {
+	txPoolLimit := shard.Schedule.MaxTxPoolSizeLimit()
+	node.pendingStakingTxMutex.Lock()
+	for _, tx := range newStakingTxs {
+		if _, ok := node.pendingStakingTransactions[tx.Hash()]; !ok {
+			node.pendingStakingTransactions[tx.Hash()] = tx
+		}
+		if len(node.pendingStakingTransactions) > txPoolLimit {
+			break
+		}
+	}
+	node.pendingStakingTxMutex.Unlock()
+	utils.Logger().Info().Int("length of newStakingTxs", len(newStakingTxs)).Int("totalPending", len(node.pendingTransactions)).Msg("Got more staking transactions")
+}
+
+// AddPendingStakingTransaction staking transactions
+func (node *Node) AddPendingStakingTransaction(
+	newStakingTx *staking.StakingTransaction) {
+	node.addPendingStakingTransactions(staking.StakingTransactions{newStakingTx})
+}
+
+// AddPendingTransaction adds one new transaction to the pending transaction list.
+// This is only called from SDK.
+func (node *Node) AddPendingTransaction(newTx *types.Transaction) {
+	if node.Consensus.IsLeader() && newTx.ShardID() == node.NodeConfig.ShardID {
+		node.addPendingTransactions(types.Transactions{newTx})
+	} else {
+		utils.Logger().Info().Str("Hash", newTx.Hash().Hex()).Msg("Broadcasting Tx")
+		node.tryBroadcast(newTx)
+	}
+	utils.Logger().Debug().Int("totalPending", len(node.pendingTransactions)).Msg("Got ONE more transaction")
+}
+
+// AddPendingReceipts adds one receipt message to pending list.
+func (node *Node) AddPendingReceipts(receipts *types.CXReceiptsProof) {
+	node.pendingCXMutex.Lock()
+	defer node.pendingCXMutex.Unlock()
+
+	if receipts.ContainsEmptyField() {
+		utils.Logger().Info().Int("totalPendingReceipts", len(node.pendingCXReceipts)).Msg("CXReceiptsProof contains empty field")
+		return
+	}
+
+	blockNum := receipts.Header.Number().Uint64()
+	shardID := receipts.Header.ShardID()
+	key := utils.GetPendingCXKey(shardID, blockNum)
+
+	if _, ok := node.pendingCXReceipts[key]; ok {
+		utils.Logger().Info().Int("totalPendingReceipts", len(node.pendingCXReceipts)).Msg("Already Got Same Receipt message")
+		return
+	}
+	node.pendingCXReceipts[key] = receipts
+	utils.Logger().Info().Int("totalPendingReceipts", len(node.pendingCXReceipts)).Msg("Got ONE more receipt message")
+}
+
+// Take out a subset of valid transactions from the pending transaction list
+// Note the pending transaction list will then contain the rest of the txs
+func (node *Node) getTransactionsForNewBlock(coinbase common.Address) (types.Transactions, staking.StakingTransactions) {
+	txsThrottleConfig := shard.Schedule.TxsThrottleConfig()
+
+	// the next block number to be added in consensus protocol, which is always one more than current chain header block
+	newBlockNum := node.Blockchain().CurrentBlock().NumberU64() + 1
+	// remove old (> txsThrottleConfigRecentTxDuration) blockNum keys from recentTxsStats and initiailize for the new block
+	for blockNum := range node.recentTxsStats {
+		recentTxsBlockNumGap := uint64(txsThrottleConfig.RecentTxDuration / node.BlockPeriod)
+		if recentTxsBlockNumGap < newBlockNum-blockNum {
+			delete(node.recentTxsStats, blockNum)
+		}
+	}
+	node.recentTxsStats[newBlockNum] = make(types.BlockTxsCounts)
+	// Must update to the correct current state before processing potential txns
+	if err := node.Worker.UpdateCurrent(coinbase); err != nil {
+		utils.Logger().Error().
+			Err(err).
+			Msg("Failed updating worker's state before txn selection")
+		return types.Transactions{}, staking.StakingTransactions{}
+	}
+
+	node.pendingTxMutex.Lock()
+	defer node.pendingTxMutex.Unlock()
+	node.pendingStakingTxMutex.Lock()
+	defer node.pendingStakingTxMutex.Unlock()
+	pendingTransactions := types.Transactions{}
+	pendingStakingTransactions := staking.StakingTransactions{}
+	for _, tx := range node.pendingTransactions {
+		pendingTransactions = append(pendingTransactions, tx)
+	}
+	for _, tx := range node.pendingStakingTransactions {
+		pendingStakingTransactions = append(pendingStakingTransactions, tx)
+	}
+
+	selected, unselected, invalid := node.Worker.SelectTransactionsForNewBlock(newBlockNum, pendingTransactions, node.recentTxsStats, txsThrottleConfig, coinbase)
+
+	selectedStaking, unselectedStaking, invalidStaking :=
+		node.Worker.SelectStakingTransactionsForNewBlock(newBlockNum, pendingStakingTransactions, coinbase)
+
+	node.pendingTransactions = make(map[common.Hash]*types.Transaction)
+	for _, unselectedTx := range unselected {
+		node.pendingTransactions[unselectedTx.Hash()] = unselectedTx
+	}
+	utils.Logger().Info().
+		Int("remainPending", len(node.pendingTransactions)).
+		Int("selected", len(selected)).
+		Int("invalidDiscarded", len(invalid)).
+		Msg("Selecting Transactions")
+
+	node.pendingStakingTransactions = make(map[common.Hash]*staking.StakingTransaction)
+	for _, unselectedStakingTx := range unselectedStaking {
+		node.pendingStakingTransactions[unselectedStakingTx.Hash()] = unselectedStakingTx
+	}
+	utils.Logger().Info().
+		Int("remainPending", len(node.pendingStakingTransactions)).
+		Int("selected", len(unselectedStaking)).
+		Int("invalidDiscarded", len(invalidStaking)).
+		Msg("Selecting Staking Transactions")
+
+	return selected, selectedStaking
+}
+
+func (node *Node) startRxPipeline(
+	receiver p2p.GroupReceiver, queue *msgq.Queue, numWorkers int,
+) {
+	// consumers
+	for i := 0; i < numWorkers; i++ {
+		go queue.HandleMessages(node)
+	}
+	// provider
+	go node.receiveGroupMessage(receiver, queue)
+}
+
+// StartServer starts a server and process the requests by a handler.
+func (node *Node) StartServer() {
+
+	// client messages are sent by clients, like txgen, wallet
+	node.startRxPipeline(node.clientReceiver, node.clientRxQueue, ClientRxWorkers)
+
+	// start the goroutine to receive group message
+	node.startRxPipeline(node.shardGroupReceiver, node.shardRxQueue, ShardRxWorkers)
+
+	// start the goroutine to receive global message, used for cross-shard TX
+	// FIXME (leo): we use beacon client topic as the global topic for now
+	node.startRxPipeline(node.globalGroupReceiver, node.globalRxQueue, GlobalRxWorkers)
+
+	select {}
+}
+
+// Count the total number of transactions in the blockchain
+// Currently used for stats reporting purpose
+func (node *Node) countNumTransactionsInBlockchain() int {
+	count := 0
+	for block := node.Blockchain().CurrentBlock(); block != nil; block = node.Blockchain().GetBlockByHash(block.Header().ParentHash()) {
+		count += len(block.Transactions())
+	}
+	return count
+}
+
+// GetSyncID returns the syncID of this node
+func (node *Node) GetSyncID() [SyncIDLength]byte {
+	return node.syncID
+}
+
+// New creates a new node.
+func New(host p2p.Host, consensusObj *consensus.Consensus, chainDBFactory shardchain.DBFactory, isArchival bool) *Node {
+	node := Node{}
+
+	node.syncFreq = SyncFrequency
+	node.beaconSyncFreq = SyncFrequency
+
+	// Get the node config that's created in the harmony.go program.
+	if consensusObj != nil {
+		node.NodeConfig = nodeconfig.GetShardConfig(consensusObj.ShardID)
+	} else {
+		node.NodeConfig = nodeconfig.GetDefaultConfig()
+	}
+
+	copy(node.syncID[:], GenerateRandomString(SyncIDLength))
+	if host != nil {
+		node.host = host
+		node.SelfPeer = host.GetSelfPeer()
+	}
+
+	chainConfig := *params.TestnetChainConfig
+	switch node.NodeConfig.GetNetworkType() {
+	case nodeconfig.Mainnet:
+		chainConfig = *params.MainnetChainConfig
+	case nodeconfig.Pangaea:
+		chainConfig = *params.PangaeaChainConfig
+	}
+	node.chainConfig = chainConfig
+
+	collection := shardchain.NewCollection(
+		chainDBFactory, &genesisInitializer{&node}, chain.Engine, &chainConfig,
+	)
+	if isArchival {
+		collection.DisableCache()
+	}
+	node.shardChains = collection
+
+	if host != nil && consensusObj != nil {
+		// Consensus and associated channel to communicate blocks
+		node.Consensus = consensusObj
+
+		// Load the chains.
+		blockchain := node.Blockchain() // this also sets node.isFirstTime if the DB is fresh
+		beaconChain := node.Beaconchain()
+
+		node.BlockChannel = make(chan *types.Block)
+		node.ConfirmedBlockChannel = make(chan *types.Block)
+		node.BeaconBlockChannel = make(chan *types.Block)
+		node.recentTxsStats = make(types.RecentTxsStats)
+		node.TxPool = core.NewTxPool(core.DefaultTxPoolConfig, node.Blockchain().Config(), blockchain)
+		node.CxPool = core.NewCxPool(core.CxPoolSize)
+		node.Worker = worker.New(node.Blockchain().Config(), blockchain, chain.Engine)
+
+		if node.Blockchain().ShardID() != shard.BeaconChainShardID {
+			node.BeaconWorker = worker.New(node.Beaconchain().Config(), beaconChain, chain.Engine)
+		}
+
+		node.pendingCXReceipts = make(map[string]*types.CXReceiptsProof)
+		node.pendingTransactions = make(map[common.Hash]*types.Transaction)
+		node.pendingStakingTransactions = make(map[common.Hash]*staking.StakingTransaction)
+		node.Consensus.VerifiedNewBlock = make(chan *types.Block)
+		chain.Engine.SetRewarder(node.Consensus.Decider.(reward.Distributor))
+		// the sequence number is the next block number to be added in consensus protocol, which is always one more than current chain header block
+		node.Consensus.SetBlockNum(blockchain.CurrentBlock().NumberU64() + 1)
+
+		// Add Faucet contract to all shards, so that on testnet, we can demo wallet in explorer
+		// TODO (leo): we need to have support of cross-shard tx later so that the token can be transferred from beacon chain shard to other tx shards.
+		if node.NodeConfig.GetNetworkType() != nodeconfig.Mainnet {
+			if node.isFirstTime {
+				// Setup one time smart contracts
+				node.AddFaucetContractToPendingTransactions()
+			} else {
+				node.AddContractKeyAndAddress(scFaucet)
+			}
+			node.ContractCaller = contracts.NewContractCaller(node.Blockchain(), node.Blockchain().Config())
+			// Create test keys.  Genesis will later need this.
+			var err error
+			node.TestBankKeys, err = CreateTestBankKeys(TestAccountNumber)
+			if err != nil {
+				utils.Logger().Error().Err(err).Msg("Error while creating test keys")
+			}
+		}
+	}
+
+	utils.Logger().Info().
+		Interface("genesis block header", node.Blockchain().GetHeaderByNumber(0)).
+		Msg("Genesis block hash")
+
+	node.clientRxQueue = msgq.New(ClientRxQueueSize)
+	node.shardRxQueue = msgq.New(ShardRxQueueSize)
+	node.globalRxQueue = msgq.New(GlobalRxQueueSize)
+
+	// Setup initial state of syncing.
+	node.peerRegistrationRecord = make(map[string]*syncConfig)
+	node.startConsensus = make(chan struct{})
+	go node.bootstrapConsensus()
+	return &node
+}
+
+// InitConsensusWithValidators initialize shard state from latest epoch and update committee pub
+// keys for consensus and drand
+func (node *Node) InitConsensusWithValidators() (err error) {
+	if node.Consensus == nil {
+		utils.Logger().Error().Msg("[InitConsensusWithValidators] consenus is nil; Cannot figure out shardID")
+		return ctxerror.New("[InitConsensusWithValidators] consenus is nil; Cannot figure out shardID")
+	}
+	shardID := node.Consensus.ShardID
+	blockNum := node.Blockchain().CurrentBlock().NumberU64()
+	node.Consensus.SetMode(consensus.Listening)
+	epoch := shard.Schedule.CalcEpochNumber(blockNum)
+	utils.Logger().Info().
+		Uint64("blockNum", blockNum).
+		Uint32("shardID", shardID).
+		Uint64("epoch", epoch.Uint64()).
+		Msg("[InitConsensusWithValidators] Try To Get PublicKeys")
+	_, pubKeys := committee.WithStakingEnabled.ComputePublicKeys(
+		epoch, node.Consensus.ChainReader, int(shardID),
+	)
+	if len(pubKeys) == 0 {
+		utils.Logger().Error().
+			Uint32("shardID", shardID).
+			Uint64("blockNum", blockNum).
+			Msg("[InitConsensusWithValidators] PublicKeys is Empty, Cannot update public keys")
+		return ctxerror.New(
+			"[InitConsensusWithValidators] PublicKeys is Empty, Cannot update public keys",
+			"shardID", shardID,
+			"blockNum", blockNum)
+	}
+
+	for i := range pubKeys {
+		if pubKeys[i].IsEqual(node.Consensus.PubKey) {
+			utils.Logger().Info().
+				Uint64("blockNum", blockNum).
+				Int("numPubKeys", len(pubKeys)).
+				Msg("[InitConsensusWithValidators] Successfully updated public keys")
+			node.Consensus.UpdatePublicKeys(pubKeys)
+			node.Consensus.SetMode(consensus.Normal)
+			return nil
+		}
+	}
+	// TODO: Disable drand. Currently drand isn't functioning but we want to compeletely turn it off for full protection.
+	// node.DRand.UpdatePublicKeys(pubKeys)
+	return nil
+}
+
+// AddPeers adds neighbors nodes
+func (node *Node) AddPeers(peers []*p2p.Peer) int {
+	count := 0
+	for _, p := range peers {
+		key := fmt.Sprintf("%s:%s:%s", p.IP, p.Port, p.PeerID)
+		_, ok := node.Neighbors.LoadOrStore(key, *p)
+		if !ok {
+			// !ok means new peer is stored
+			count++
+			node.host.AddPeer(p)
+			node.numPeers++
+			continue
+		}
+	}
+
+	return count
+}
+
+// AddBeaconPeer adds beacon chain neighbors nodes
+// Return false means new neighbor peer was added
+// Return true means redundant neighbor peer wasn't added
+func (node *Node) AddBeaconPeer(p *p2p.Peer) bool {
+	key := fmt.Sprintf("%s:%s:%s", p.IP, p.Port, p.PeerID)
+	_, ok := node.BeaconNeighbors.LoadOrStore(key, *p)
+	return ok
+}
+
+// isBeacon = true if the node is beacon node
+// isClient = true if the node light client(wallet)
+func (node *Node) initNodeConfiguration() (service.NodeConfig, chan p2p.Peer) {
+	chanPeer := make(chan p2p.Peer)
+
+	nodeConfig := service.NodeConfig{
+		PushgatewayIP:   node.NodeConfig.GetPushgatewayIP(),
+		PushgatewayPort: node.NodeConfig.GetPushgatewayPort(),
+		IsClient:        node.NodeConfig.IsClient(),
+		Beacon:          nodeconfig.NewGroupIDByShardID(0),
+		ShardGroupID:    node.NodeConfig.GetShardGroupID(),
+		Actions:         make(map[nodeconfig.GroupID]nodeconfig.ActionType),
+	}
+
+	if nodeConfig.IsClient {
+		nodeConfig.Actions[nodeconfig.NewClientGroupIDByShardID(0)] = nodeconfig.ActionStart
+	} else {
+		nodeConfig.Actions[node.NodeConfig.GetShardGroupID()] = nodeconfig.ActionStart
+	}
+
+	var err error
+	node.shardGroupReceiver, err = node.host.GroupReceiver(node.NodeConfig.GetShardGroupID())
+	if err != nil {
+		utils.Logger().Error().Err(err).Msg("Failed to create shard receiver")
+	}
+
+	node.globalGroupReceiver, err = node.host.GroupReceiver(nodeconfig.NewClientGroupIDByShardID(0))
+	if err != nil {
+		utils.Logger().Error().Err(err).Msg("Failed to create global receiver")
+	}
+
+	node.clientReceiver, err = node.host.GroupReceiver(node.NodeConfig.GetClientGroupID())
+	if err != nil {
+		utils.Logger().Error().Err(err).Msg("Failed to create client receiver")
+	}
+	return nodeConfig, chanPeer
+}
+
+// AccountManager ...
+func (node *Node) AccountManager() *accounts.Manager {
+	return node.accountManager
+}
+
+// ServiceManager ...
+func (node *Node) ServiceManager() *service.Manager {
+	return node.serviceManager
+}
+
+// SetSyncFreq sets the syncing frequency in the loop
+func (node *Node) SetSyncFreq(syncFreq int) {
+	node.syncFreq = syncFreq
+}
+
+// SetBeaconSyncFreq sets the syncing frequency in the loop
+func (node *Node) SetBeaconSyncFreq(syncFreq int) {
+	node.beaconSyncFreq = syncFreq
+}