node/node.go

   1 package node
   2
   3 import (
   4         "context"
   5         "errors"
   6         "net/http"
   7         _ "net/http/pprof"
   8         "os"
   9         "path/filepath"
  10         "time"
  11
  12         "github.com/prometheus/prometheus/util/flock"
  13         log "github.com/sirupsen/logrus"
  14         cmn "github.com/tendermint/tmlibs/common"
  15         dbm "github.com/tendermint/tmlibs/db"
  16         browser "github.com/toqueteos/webbrowser"
  17
  18         "github.com/bytom/accesstoken"
  19         "github.com/bytom/account"
  20         "github.com/bytom/api"
  21         "github.com/bytom/asset"
  22         "github.com/bytom/blockchain/pseudohsm"
  23         "github.com/bytom/blockchain/txfeed"
  24         cfg "github.com/bytom/config"
  25         "github.com/bytom/consensus"
  26         "github.com/bytom/database/leveldb"
  27         "github.com/bytom/env"
  28         "github.com/bytom/mining/cpuminer"
  29         "github.com/bytom/mining/miningpool"
  30         "github.com/bytom/netsync"
  31         "github.com/bytom/protocol"
  32         "github.com/bytom/protocol/bc"
  33         "github.com/bytom/types"
  34         w "github.com/bytom/wallet"
  35 )
  36
  37 const (
  38         webAddress               = "http://127.0.0.1:9888"
  39         expireReservationsPeriod = time.Second
  40         maxNewBlockChSize        = 1024
  41 )
  42
  43 type Node struct {
  44         cmn.BaseService
  45
  46         // config
  47         config *cfg.Config
  48
  49         syncManager *netsync.SyncManager
  50
  51         evsw types.EventSwitch // pub/sub for services
  52         //bcReactor    *bc.BlockchainReactor
  53         wallet       *w.Wallet
  54         accessTokens *accesstoken.CredentialStore
  55         api          *api.API
  56         chain        *protocol.Chain
  57         txfeed       *txfeed.Tracker
  58         cpuMiner     *cpuminer.CPUMiner
  59         miningPool   *miningpool.MiningPool
  60         miningEnable bool
  61 }
  62
  63 func NewNode(config *cfg.Config) *Node {
  64         ctx := context.Background()
  65         if err := lockDataDirectory(config); err != nil {
  66                 cmn.Exit("Error: " + err.Error())
  67         }
  68         initLogFile(config)
  69         initActiveNetParams(config)
  70         // Get store
  71         coreDB := dbm.NewDB("core", config.DBBackend, config.DBDir())
  72         store := leveldb.NewStore(coreDB)
  73
  74         tokenDB := dbm.NewDB("accesstoken", config.DBBackend, config.DBDir())
  75         accessTokens := accesstoken.NewStore(tokenDB)
  76
  77         // Make event switch
  78         eventSwitch := types.NewEventSwitch()
  79         if _, err := eventSwitch.Start(); err != nil {
  80                 cmn.Exit(cmn.Fmt("Failed to start switch: %v", err))
  81         }
  82
  83         txPool := protocol.NewTxPool()
  84         chain, err := protocol.NewChain(store, txPool)
  85         if err != nil {
  86                 cmn.Exit(cmn.Fmt("Failed to create chain structure: %v", err))
  87         }
  88
  89         var accounts *account.Manager = nil
  90         var assets *asset.Registry = nil
  91         var wallet *w.Wallet = nil
  92         var txFeed *txfeed.Tracker = nil
  93
  94         txFeedDB := dbm.NewDB("txfeeds", config.DBBackend, config.DBDir())
  95         txFeed = txfeed.NewTracker(txFeedDB, chain)
  96
  97         if err = txFeed.Prepare(ctx); err != nil {
  98                 log.WithField("error", err).Error("start txfeed")
  99                 return nil
 100         }
 101
 102         hsm, err := pseudohsm.New(config.KeysDir())
 103         if err != nil {
 104                 cmn.Exit(cmn.Fmt("initialize HSM failed: %v", err))
 105         }
 106
 107         if !config.Wallet.Disable {
 108                 walletDB := dbm.NewDB("wallet", config.DBBackend, config.DBDir())
 109                 accounts = account.NewManager(walletDB, chain)
 110                 assets = asset.NewRegistry(walletDB, chain)
 111                 wallet, err = w.NewWallet(walletDB, accounts, assets, hsm, chain)
 112                 if err != nil {
 113                         log.WithField("error", err).Error("init NewWallet")
 114                 }
 115
 116                 // trigger rescan wallet
 117                 if config.Wallet.Rescan {
 118                         wallet.RescanBlocks()
 119                 }
 120
 121                 // Clean up expired UTXO reservations periodically.
 122                 go accounts.ExpireReservations(ctx, expireReservationsPeriod)
 123         }
 124         newBlockCh := make(chan *bc.Hash, maxNewBlockChSize)
 125
 126         syncManager, _ := netsync.NewSyncManager(config, chain, txPool, newBlockCh)
 127
 128         // get transaction from txPool and send it to syncManager and wallet
 129         go newPoolTxListener(txPool, syncManager, wallet)
 130
 131         // run the profile server
 132         profileHost := config.ProfListenAddress
 133         if profileHost != "" {
 134                 // Profiling bytomd programs.see (https://blog.golang.org/profiling-go-programs)
 135                 // go tool pprof http://profileHose/debug/pprof/heap
 136                 go func() {
 137                         http.ListenAndServe(profileHost, nil)
 138                 }()
 139         }
 140
 141         node := &Node{
 142                 config:       config,
 143                 syncManager:  syncManager,
 144                 evsw:         eventSwitch,
 145                 accessTokens: accessTokens,
 146                 wallet:       wallet,
 147                 chain:        chain,
 148                 txfeed:       txFeed,
 149                 miningEnable: config.Mining,
 150         }
 151
 152         node.cpuMiner = cpuminer.NewCPUMiner(chain, accounts, txPool, newBlockCh)
 153         node.miningPool = miningpool.NewMiningPool(chain, accounts, txPool, newBlockCh)
 154
 155         node.BaseService = *cmn.NewBaseService(nil, "Node", node)
 156
 157         return node
 158 }
 159
 160 // newPoolTxListener listener transaction from txPool, and send it to syncManager and wallet
 161 func newPoolTxListener(txPool *protocol.TxPool, syncManager *netsync.SyncManager, wallet *w.Wallet) {
 162         newTxCh := txPool.GetNewTxCh()
 163         syncManagerTxCh := syncManager.GetNewTxCh()
 164
 165         for {
 166                 newTx := <-newTxCh
 167                 syncManagerTxCh <- newTx
 168                 if wallet != nil {
 169                         wallet.GetNewTxCh() <- newTx
 170                 }
 171         }
 172 }
 173
 174 // Lock data directory after daemonization
 175 func lockDataDirectory(config *cfg.Config) error {
 176         _, _, err := flock.New(filepath.Join(config.RootDir, "LOCK"))
 177         if err != nil {
 178                 return errors.New("datadir already used by another process")
 179         }
 180         return nil
 181 }
 182
 183 func initActiveNetParams(config *cfg.Config) {
 184         var exist bool
 185         consensus.ActiveNetParams, exist = consensus.NetParams[config.ChainID]
 186         if !exist {
 187                 cmn.Exit(cmn.Fmt("chain_id[%v] don't exist", config.ChainID))
 188         }
 189 }
 190
 191 func initLogFile(config *cfg.Config) {
 192         if config.LogFile == "" {
 193                 return
 194         }
 195         cmn.EnsureDir(filepath.Dir(config.LogFile), 0700)
 196         file, err := os.OpenFile(config.LogFile, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
 197         if err == nil {
 198                 log.SetOutput(file)
 199         } else {
 200                 log.WithField("err", err).Info("using default")
 201         }
 202
 203 }
 204
 205 // Lanch web broser or not
 206 func launchWebBrowser() {
 207         log.Info("Launching System Browser with :", webAddress)
 208         if err := browser.Open(webAddress); err != nil {
 209                 log.Error(err.Error())
 210                 return
 211         }
 212 }
 213
 214 func (n *Node) initAndstartApiServer() {
 215         n.api = api.NewAPI(n.syncManager, n.wallet, n.txfeed, n.cpuMiner, n.miningPool, n.chain, n.config, n.accessTokens)
 216
 217         listenAddr := env.String("LISTEN", n.config.ApiAddress)
 218         env.Parse()
 219         n.api.StartServer(*listenAddr)
 220 }
 221
 222 func (n *Node) OnStart() error {
 223         if n.miningEnable {
 224                 n.cpuMiner.Start()
 225         }
 226         if !n.config.VaultMode {
 227                 n.syncManager.Start()
 228         }
 229         n.initAndstartApiServer()
 230         if !n.config.Web.Closed {
 231                 launchWebBrowser()
 232         }
 233         return nil
 234 }
 235
 236 func (n *Node) OnStop() {
 237         n.BaseService.OnStop()
 238         if n.miningEnable {
 239                 n.cpuMiner.Stop()
 240         }
 241         if !n.config.VaultMode {
 242                 n.syncManager.Stop()
 243         }
 244 }
 245
 246 func (n *Node) RunForever() {
 247         // Sleep forever and then...
 248         cmn.TrapSignal(func() {
 249                 n.Stop()
 250         })
 251 }
 252
 253 func (n *Node) EventSwitch() types.EventSwitch {
 254         return n.evsw
 255 }
 256
 257 func (n *Node) SyncManager() *netsync.SyncManager {
 258         return n.syncManager
 259 }
 260
 261 func (n *Node) MiningPool() *miningpool.MiningPool {
 262         return n.miningPool
 263 }