backend.go

// Copyright (c) 2018 The MATRIX Authors
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php

// Package man implements the Matrix protocol.
package man

import (
	"errors"
	"fmt"
	"math/big"
	"runtime"
	"sync/atomic"

	"github.com/MatrixAINetwork/go-matrix/ca"
	"github.com/MatrixAINetwork/go-matrix/params/manparams"

	"github.com/MatrixAINetwork/go-matrix/mc"
	"github.com/MatrixAINetwork/go-matrix/reelection"

	"github.com/MatrixAINetwork/go-matrix/accounts"
	"github.com/MatrixAINetwork/go-matrix/accounts/signhelper"
	"github.com/MatrixAINetwork/go-matrix/blkgenor"
	"github.com/MatrixAINetwork/go-matrix/blkverify"
	"github.com/MatrixAINetwork/go-matrix/broadcastTx"
	"github.com/MatrixAINetwork/go-matrix/common"
	"github.com/MatrixAINetwork/go-matrix/common/hexutil"
	"github.com/MatrixAINetwork/go-matrix/consensus"
	"github.com/MatrixAINetwork/go-matrix/consensus/blkmanage"
	"github.com/MatrixAINetwork/go-matrix/consensus/clique"
	"github.com/MatrixAINetwork/go-matrix/consensus/manash"
	"github.com/MatrixAINetwork/go-matrix/core"
	"github.com/MatrixAINetwork/go-matrix/core/bloombits"
	"github.com/MatrixAINetwork/go-matrix/core/rawdb"
	"github.com/MatrixAINetwork/go-matrix/core/types"
	"github.com/MatrixAINetwork/go-matrix/core/vm"
	"github.com/MatrixAINetwork/go-matrix/depoistInfo"
	"github.com/MatrixAINetwork/go-matrix/event"
	"github.com/MatrixAINetwork/go-matrix/internal/manapi"
	"github.com/MatrixAINetwork/go-matrix/log"
	"github.com/MatrixAINetwork/go-matrix/man/downloader"
	"github.com/MatrixAINetwork/go-matrix/man/filters"
	"github.com/MatrixAINetwork/go-matrix/man/gasprice"
	"github.com/MatrixAINetwork/go-matrix/mandb"
	"github.com/MatrixAINetwork/go-matrix/miner"
	"github.com/MatrixAINetwork/go-matrix/msgsend"
	"github.com/MatrixAINetwork/go-matrix/p2p"
	"github.com/MatrixAINetwork/go-matrix/params"
	"github.com/MatrixAINetwork/go-matrix/pod"
	"github.com/MatrixAINetwork/go-matrix/rlp"
	"github.com/MatrixAINetwork/go-matrix/rpc"

	"sync"

	"github.com/MatrixAINetwork/go-matrix/baseinterface"
	//"github.com/MatrixAINetwork/go-matrix/leaderelect"
	"time"

	"github.com/MatrixAINetwork/go-matrix/leaderelect"
	"github.com/MatrixAINetwork/go-matrix/leaderelect2.0"
	"github.com/MatrixAINetwork/go-matrix/lessdisk"
	"github.com/MatrixAINetwork/go-matrix/olconsensus"
	"github.com/MatrixAINetwork/go-matrix/p2p/discover"
)

var MsgCenter *mc.Center

type LesServer interface {
	Start(srvr *p2p.Server)
	Stop()
	Protocols() []p2p.Protocol
	SetBloomBitsIndexer(bbIndexer *core.ChainIndexer)
}

// Matrix implements the Matrix full node service.
type Matrix struct {
	config      *Config
	chainConfig *params.ChainConfig

	// Channel for shutting down the service
	shutdownChan chan bool // Channel for shutting down the Matrix

	// Handlers
	//txPool          *core.TxPool
	txPool          *core.TxPoolManager
	blockchain      *core.BlockChain
	protocolManager *ProtocolManager
	lesServer       LesServer

	// DB interfaces
	chainDb mandb.Database // Block chain database

	eventMux       *event.TypeMux
	engine         consensus.Engine
	accountManager *accounts.Manager

	bloomRequests chan chan *bloombits.Retrieval // Channel receiving bloom data retrieval requests
	bloomIndexer  *core.ChainIndexer             // Bloom indexer operating during block imports

	APIBackend *ManAPIBackend

	miner    *miner.Miner
	gasPrice *big.Int
	manbase  common.Address

	networkId     uint64
	netRPCService *manapi.PublicNetAPI

	broadTx *broadcastTx.BroadCast //

	//algorithm
	ca         *ca.Identity //node传进来的
	msgcenter  *mc.Center   //node传进来的
	hd         *msgsend.HD  //node传进来的
	signHelper *signhelper.SignHelper

	reelection     *reelection.ReElection //换届服务
	random         *baseinterface.Random
	olConsensus    *olconsensus.TopNodeService
	blockGen       *blkgenor.BlockGenor
	manBlkManage   *blkmanage.ManBlkManage
	blockVerify    *blkverify.BlockVerify
	leaderServer   *leaderelect.LeaderIdentity
	leaderServerV2 *leaderelect2.LeaderIdentity
	lessDiskSvr    *lessdisk.Server

	lock sync.RWMutex // Protects the variadic fields (e.g. gas price and manbase)
}

func (s *Matrix) AddLesServer(ls LesServer) {
	s.lesServer = ls
	ls.SetBloomBitsIndexer(s.bloomIndexer)
}

// New creates a new Matrix object (including the
// initialisation of the common Matrix object)
func New(ctx *pod.ServiceContext, config *Config) (*Matrix, error) {
	if config.SyncMode == downloader.LightSync {
		return nil, errors.New("can't run man.Matrix in light sync mode, use les.LightMatrix")
	}
	if !config.SyncMode.IsValid() {
		return nil, fmt.Errorf("invalid sync mode %d", config.SyncMode)
	}
	chainDb, err := CreateDB(ctx, config, "chaindata")
	if err != nil {
		return nil, err
	}

	chainConfig, genesisHash, genesisErr := core.SetupGenesisBlock(chainDb, config.Genesis)
	if _, ok := genesisErr.(*params.ConfigCompatError); genesisErr != nil && !ok {
		return nil, genesisErr
	}
	log.Info("Initialised chain configuration", "config", chainConfig)

	man := &Matrix{
		config:         config,
		chainDb:        chainDb,
		chainConfig:    chainConfig,
		eventMux:       ctx.EventMux,
		accountManager: ctx.AccountManager,
		ca:             ctx.Ca,
		msgcenter:      ctx.MsgCenter,
		hd:             ctx.HD,
		signHelper:     ctx.SignHelper,

		engine:        CreateConsensusEngine(ctx, &config.Manash, chainConfig, chainDb),
		shutdownChan:  make(chan bool),
		networkId:     config.NetworkId,
		gasPrice:      config.GasPrice,
		manbase:       config.Manerbase,
		bloomRequests: make(chan chan *bloombits.Retrieval),
		bloomIndexer:  NewBloomIndexer(chainDb, params.BloomBitsBlocks),
	}
	log.Info("Initialising Matrix protocol", "versions", ProtocolVersions, "network", config.NetworkId)

	if !config.SkipBcVersionCheck {
		bcVersion := rawdb.ReadDatabaseVersion(chainDb)
		if bcVersion != core.BlockChainVersion && bcVersion != 0 {
			return nil, fmt.Errorf("Blockchain DB version mismatch (%d / %d). Run gman upgradedb.\n", bcVersion, core.BlockChainVersion)
		}
		rawdb.WriteDatabaseVersion(chainDb, core.BlockChainVersion)
	}
	var (
		vmConfig    = vm.Config{EnablePreimageRecording: config.EnablePreimageRecording}
		cacheConfig = &core.CacheConfig{Disabled: config.NoPruning, TrieNodeLimit: config.TrieCache, TrieTimeLimit: config.TrieTimeout}
	)
	man.blockchain, err = core.NewBlockChain(chainDb, cacheConfig, man.chainConfig, man.engine, vmConfig)
	if err != nil {
		return nil, err
	}

	// Rewind the chain in case of an incompatible config upgrade.
	if compat, ok := genesisErr.(*params.ConfigCompatError); ok {
		log.Warn("Rewinding chain to upgrade configuration", "err", compat)
		man.blockchain.SetHead(compat.RewindTo)
		rawdb.WriteChainConfig(chainDb, genesisHash, chainConfig)
	}
	man.bloomIndexer.Start(man.blockchain)

	man.signHelper.SetAuthReader(man.blockchain)

	ca.SetTopologyReader(man.blockchain.GetTopologyStore())

	//if config.TxPool.Journal != "" {
	//	config.TxPool.Journal = ctx.ResolvePath(config.TxPool.Journal)
	//}
	man.txPool = core.NewTxPoolManager(config.TxPool, man.chainConfig, man.blockchain, ctx.GetConfig().DataDir)

	if man.protocolManager, err = NewProtocolManager(man.chainConfig, config.SyncMode, config.NetworkId, man.eventMux, man.txPool, man.engine, man.blockchain, chainDb, ctx.MsgCenter); err != nil {
		return nil, err
	}
	//man.protocolManager.Msgcenter = ctx.MsgCenter
	MsgCenter = ctx.MsgCenter
	man.miner, err = miner.New(man.blockchain, man.chainConfig, man.EventMux(), man.hd)
	if err != nil {
		return nil, err
	}
	man.miner.SetExtra(makeExtraData(config.ExtraData))

	//algorithm
	man.random, err = baseinterface.NewRandom(man.blockchain)
	if err != nil {
		return nil, err
	}
	man.blockchain.Processor([]byte(manparams.VersionAlpha)).SetRandom(man.random)
	man.olConsensus = olconsensus.NewTopNodeService(man.blockchain)
	topNodeInstance := olconsensus.NewTopNodeInstance(man.signHelper, man.hd)
	man.olConsensus.SetValidatorReader(man.blockchain)
	man.olConsensus.SetStateReaderInterface(man.blockchain.GetTopologyStore())
	man.olConsensus.SetTopNodeStateInterface(topNodeInstance)
	man.olConsensus.SetValidatorAccountInterface(topNodeInstance)
	man.olConsensus.SetMessageSendInterface(topNodeInstance)
	man.olConsensus.SetMessageCenterInterface(topNodeInstance)

	if err = man.olConsensus.Start(); err != nil {
		return nil, err
	}
	man.reelection, err = reelection.New(man.blockchain, man.random, man.olConsensus)
	if err != nil {
		return nil, err
	}

	man.blockchain.RegisterMatrixStateDataProducer(mc.MSKeyElectGraph, man.reelection.ProduceElectGraphData)
	man.blockchain.RegisterMatrixStateDataProducer(mc.MSKeyElectOnlineState, man.reelection.ProduceElectOnlineStateData)
	man.blockchain.RegisterMatrixStateDataProducer(mc.MSKeyPreBroadcastRoot, man.reelection.ProducePreBroadcastStateData)
	man.blockchain.RegisterMatrixStateDataProducer(mc.MSKeyMinHash, man.reelection.ProduceMinHashData)
	man.blockchain.RegisterMatrixStateDataProducer(mc.MSKeyBroadcastTx, core.ProduceMatrixStateData)

	man.APIBackend = &ManAPIBackend{man, nil}
	gpoParams := config.GPO
	if gpoParams.Default == nil {
		gpoParams.Default = config.GasPrice
	}
	man.APIBackend.gpo = gasprice.NewOracle(man.APIBackend, gpoParams)
	depoistInfo.NewDepositInfo(man.APIBackend)
	man.broadTx = broadcastTx.NewBroadCast(man.APIBackend) //

	man.leaderServer, err = leaderelect.NewLeaderIdentityService(man, "leader服务")
	if err != nil {
		return nil, err
	}
	man.leaderServerV2, err = leaderelect2.NewLeaderIdentityService(man, "leader服务V2")
	if err != nil {
		return nil, err
	}
	man.manBlkManage, err = blkmanage.New(man)
	if err != nil {
		return nil, err
	}
	man.blockGen, err = blkgenor.New(man)
	if err != nil {
		return nil, err
	}
	man.blockVerify, err = blkverify.NewBlockVerify(man)
	if err != nil {
		return nil, err
	}
	man.lessDiskSvr = lessdisk.NewLessDiskSvr(params.DefLessDiskConfig, chainDb, man.blockchain)
	man.lessDiskSvr.FuncSwitch(ctx.GetConfig().LessDisk)

	return man, nil
}

func makeExtraData(extra []byte) []byte {
	if len(extra) == 0 {
		// create default extradata
		extra, _ = rlp.EncodeToBytes([]interface{}{
			uint(params.VersionMajor<<16 | params.VersionMinor<<8 | params.VersionPatch),
			"gman",
			runtime.Version(),
			runtime.GOOS,
		})
	}
	if uint64(len(extra)) > params.MaximumExtraDataSize {
		log.Warn("Miner extra data exceed limit", "extra", hexutil.Bytes(extra), "limit", params.MaximumExtraDataSize)
		extra = nil
	}
	return extra
}

// CreateDB creates the chain database.
func CreateDB(ctx *pod.ServiceContext, config *Config, name string) (mandb.Database, error) {
	db, err := ctx.OpenDatabase(name, config.DatabaseCache, config.DatabaseHandles,config.DatabaseTableSize)
	if err != nil {
		return nil, err
	}
	if db, ok := db.(*mandb.LDBDatabase); ok {
		db.Meter("man/db/chaindata/")
	}
	return db, nil
}

// CreateConsensusEngine creates the required type of consensus engine instance for an Matrix service
func CreateConsensusEngine(ctx *pod.ServiceContext, config *manash.Config, chainConfig *params.ChainConfig, db mandb.Database) consensus.Engine {
	// If proof-of-authority is requested, set it up
	if chainConfig.Clique != nil {
		return clique.New(chainConfig.Clique, db)
	}
	// Otherwise assume proof-of-work
	switch config.PowMode {
	case manash.ModeFake:
		log.Warn("Manash used in fake mode")
		return manash.NewFaker()
	case manash.ModeTest:
		log.Warn("Manash used in test mode")
		return manash.NewTester()
	case manash.ModeShared:
		log.Warn("Manash used in shared mode")
		return manash.NewShared()
	default:
		engine := manash.New(manash.Config{
			CacheDir:       ctx.ResolvePath(config.CacheDir),
			CachesInMem:    config.CachesInMem,
			CachesOnDisk:   config.CachesOnDisk,
			DatasetDir:     config.DatasetDir,
			DatasetsInMem:  config.DatasetsInMem,
			DatasetsOnDisk: config.DatasetsOnDisk,
		})
		engine.SetThreads(-1) // Disable CPU mining
		return engine
	}
}

// APIs return the collection of RPC services the matrix package offers.
// NOTE, some of these services probably need to be moved to somewhere else.
func (s *Matrix) APIs() []rpc.API {
	apis := manapi.GetAPIs(s.APIBackend)

	// Append any APIs exposed explicitly by the consensus engine
	apis = append(apis, s.engine.APIs(s.BlockChain())...)

	// Append all the local APIs and return

	return append(apis, []rpc.API{
		{
			Namespace: "man",
			Version:   "1.0",
			Service:   NewPublicMatrixAPI(s),
			Public:    true,
		}, {
			Namespace: "eth",
			Version:   "1.0",
			Service:   NewPublicMatrixAPI(s),
			Public:    true,
		}, {
			Namespace: "man",
			Version:   "1.0",
			Service:   NewPublicMinerAPI(s),
			Public:    true,
		}, {
			Namespace: "eth",
			Version:   "1.0",
			Service:   NewPublicMinerAPI(s),
			Public:    true,
		}, {
			Namespace: "man",
			Version:   "1.0",
			Service:   downloader.NewPublicDownloaderAPI(s.protocolManager.downloader, s.eventMux),
			Public:    true,
		}, {
			Namespace: "eth",
			Version:   "1.0",
			Service:   downloader.NewPublicDownloaderAPI(s.protocolManager.downloader, s.eventMux),
			Public:    true,
		}, {
			Namespace: "miner",
			Version:   "1.0",
			Service:   NewPrivateMinerAPI(s),
			Public:    false,
		}, {
			Namespace: "man",
			Version:   "1.0",
			Service:   filters.NewPublicFilterAPI(s.APIBackend, false),
			Public:    true,
		}, {
			Namespace: "eth",
			Version:   "1.0",
			Service:   filters.NewPublicFilterAPI(s.APIBackend, false),
			Public:    true,
		}, {
			Namespace: "admin",
			Version:   "1.0",
			Service:   NewPrivateAdminAPI(s),
		}, {
			Namespace: "debug",
			Version:   "1.0",
			Service:   NewPublicDebugAPI(s),
			Public:    true,
		}, {
			Namespace: "debug",
			Version:   "1.0",
			Service:   NewPrivateDebugAPI(s.chainConfig, s),
		}, {
			Namespace: "net",
			Version:   "1.0",
			Service:   s.netRPCService,
			Public:    true,
		},
	}...)
}

func (s *Matrix) ResetWithGenesisBlock(gb *types.Block) {
	s.blockchain.ResetWithGenesisBlock(gb)
}

func (s *Matrix) Manerbase() (eb common.Address, err error) {
	s.lock.RLock()
	manbase := s.manbase
	s.lock.RUnlock()

	if manbase != (common.Address{}) {
		return manbase, nil
	}
	if wallets := s.AccountManager().Wallets(); len(wallets) > 0 {
		if accounts := wallets[0].Accounts(); len(accounts) > 0 {
			manbase := accounts[0].Address

			s.lock.Lock()
			s.manbase = manbase
			s.lock.Unlock()

			log.Info("Manerbase automatically configured", "address", manbase)
			return manbase, nil
		}
	}
	return common.Address{}, fmt.Errorf("manbase must be explicitly specified")
}

func (s *Matrix) StartMining(local bool) error {
	eb, err := s.Manerbase()
	if err != nil {
		log.Error("Cannot start mining without manbase", "err", err)
		return fmt.Errorf("manbase missing: %v", err)
	}
	if clique, ok := s.engine.(*clique.Clique); ok {
		wallet, err := s.accountManager.Find(accounts.Account{Address: eb})
		if wallet == nil || err != nil {
			log.Error("Manerbase account unavailable locally", "err", err)
			return fmt.Errorf("signer missing: %v", err)
		}
		clique.Authorize(eb, wallet.SignHash)
	}
	if local {
		// If local (CPU) mining is started, we can disable the transaction rejection
		// mechanism introduced to speed sync times. CPU mining on mainnet is ludicrous
		// so none will ever hit this path, whereas marking sync done on CPU mining
		// will ensure that private networks work in single miner mode too.
		atomic.StoreUint32(&s.protocolManager.acceptTxs, 1)
	}
	go s.miner.Start()
	return nil
}

func (s *Matrix) StopMining()         { s.miner.Stop() }
func (s *Matrix) IsMining() bool      { return s.miner.Mining() }
func (s *Matrix) Miner() *miner.Miner { return s.miner }

func (s *Matrix) AccountManager() *accounts.Manager { return s.accountManager }
func (s *Matrix) BlockChain() *core.BlockChain      { return s.blockchain }
func (s *Matrix) TxPool() *core.TxPoolManager       { return s.txPool } //Y
func (s *Matrix) EventMux() *event.TypeMux          { return s.eventMux }
func (s *Matrix) Engine() consensus.Engine          { return s.engine }
func (s *Matrix) DPOSEngine() consensus.DPOSEngine {
	block := s.blockchain.CurrentBlock()
	if nil == block {
		s.blockchain.DPOSEngine([]byte("default"))
	}
	return s.blockchain.DPOSEngine(s.blockchain.CurrentBlock().Version())
}
func (s *Matrix) ChainDb() mandb.Database                  { return s.chainDb }
func (s *Matrix) IsListening() bool                        { return true } // Always listening
func (s *Matrix) ManVersion() int                          { return int(s.protocolManager.SubProtocols[0].Version) }
func (s *Matrix) NetVersion() uint64                       { return s.networkId }
func (s *Matrix) Downloader() *downloader.Downloader       { return s.protocolManager.downloader }
func (s *Matrix) CA() *ca.Identity                         { return s.ca }
func (s *Matrix) MsgCenter() *mc.Center                    { return s.msgcenter }
func (s *Matrix) SignHelper() *signhelper.SignHelper       { return s.signHelper }
func (s *Matrix) ReElection() *reelection.ReElection       { return s.reelection }
func (s *Matrix) HD() *msgsend.HD                          { return s.hd }
func (s *Matrix) OLConsensus() *olconsensus.TopNodeService { return s.olConsensus }
func (s *Matrix) Random() *baseinterface.Random            { return s.random }
func (s *Matrix) ManBlkDeal() *blkmanage.ManBlkManage      { return s.manBlkManage }

// Protocols implements node.Service, returning all the currently configured
// network protocols to start.
func (s *Matrix) Protocols() []p2p.Protocol {
	if s.lesServer == nil {
		return s.protocolManager.SubProtocols
	}
	return append(s.protocolManager.SubProtocols, s.lesServer.Protocols()...)
}

// Start implements node.Service, starting all internal goroutines needed by the
// Matrix protocol implementation.
func (s *Matrix) Start(srvr *p2p.Server) error {
	srvr.NetWorkId = s.config.NetworkId
	// Start the bloom bits servicing goroutines
	s.startBloomHandlers()

	// Start the RPC service
	s.netRPCService = manapi.NewPublicNetAPI(srvr, s.NetVersion())

	// Figure out a max peers count based on the server limits
	maxPeers := srvr.MaxPeers
	if s.config.LightServ > 0 {
		if s.config.LightPeers >= srvr.MaxPeers {
			return fmt.Errorf("invalid peer config: light peer count (%d) >= total peer count (%d)", s.config.LightPeers, srvr.MaxPeers)
		}
		maxPeers -= s.config.LightPeers
	}
	// Start the networking layer and the light server if requested
	s.protocolManager.Start(maxPeers)
	if s.lesServer != nil {
		s.lesServer.Start(srvr)
	}
	//s.broadTx.Start()//
	return nil
}

//func (s *Matrix) FetcherNotify(hash common.Hash, number uint64) {
//	ids := ca.GetRolesByGroup(common.RoleValidator | common.RoleBroadcast)
//	selfId := p2p.ServerP2p.Self().ID.String()
//	for _, id := range ids {
//		if id.String() == selfId {
//			log.Info("func FetcherNotify  NodeID is same ", "selfID", selfId, "ca`s nodeID", id.String())
//			continue
//		}
//		peer := s.protocolManager.Peers.Peer(id.String()[:16])
//		if peer == nil {
//			continue
//		}
//		s.protocolManager.fetcher.Notify(id.String()[:16], hash, number, time.Now(), peer.RequestOneHeader, peer.RequestBodies)
//	}
//}
func (s *Matrix) FetcherNotify(hash common.Hash, number uint64, addr common.Address) {
	log.Trace("download backend func FetcherNotify ", "number", number, "hash", hash.String(), "addr", addr.String())
	return
	var nid discover.NodeID
	if len(addr) == 0 || addr == (common.Address{}) {
		addrs := ca.GetRolesByGroup(common.RoleValidator | common.RoleBroadcast)
		selfId := p2p.ServerP2p.Self().ID.String()
		indexs := p2p.Random(len(addrs), 1)
		if len(indexs) > 0 && indexs[0] <= (len(addrs)-1) {
			nid = p2p.ServerP2p.ConvertAddressToId(addrs[indexs[0]])
		}
		if nid.String() == selfId {
			log.Info("func FetcherNotify  NodeID is same ", "selfID", selfId, "ca`s nodeID", nid.String())
			if indexs[0] == (len(addrs) - 1) {
				nid = p2p.ServerP2p.ConvertAddressToId(addrs[indexs[0]-1])
			} else {
				nid = p2p.ServerP2p.ConvertAddressToId(addrs[indexs[0]+1])
			}
		}

	} else {
		nid = p2p.ServerP2p.ConvertAddressToId(addr)
	}
	if nid.String() == "" {
		log.Info("backend func FetcherNotify", "NodeID is nil", nid.String(), "address", addr)
		return
	}
	peer := s.protocolManager.Peers.Peer(nid.String()[:16])
	if peer == nil {
		log.Info("backend func FetcherNotify", "get PeerID is nil by Validator ID:id", nid.String()[:16])
		return
	}
	s.protocolManager.fetcher.Notify(nid.String()[:16], hash, number, time.Now(), peer.RequestOneHeader, peer.RequestBodies)

}

// Stop implements node.Service, terminating all internal goroutines used by the
// Matrix protocol.
func (s *Matrix) Stop() error {
	s.blockGen.Close()
	s.blockVerify.Close()
	s.olConsensus.Close()
	s.bloomIndexer.Close()
	s.blockchain.Stop()
	s.protocolManager.Stop()
	if s.lesServer != nil {
		s.lesServer.Stop()
	}
	s.txPool.Stop()
	s.miner.Stop()
	s.eventMux.Stop()

	s.chainDb.Close()
	s.broadTx.Stop() //
	close(s.shutdownChan)

	return nil
}