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/protocol/bc/types"
  34         "github.com/bytom/types"
  35         w "github.com/bytom/wallet"
  36 )
  37
  38 const (
  39         webAddress               = "http://127.0.0.1:9888"
  40         expireReservationsPeriod = time.Second
  41         maxNewBlockChSize        = 1024
  42 )
  43
  44 type Node struct {
  45         cmn.BaseService
  46
  47         // config
  48         config *cfg.Config
  49
  50         syncManager *netsync.SyncManager
  51
  52         evsw types.EventSwitch // pub/sub for services
  53         //bcReactor    *bc.BlockchainReactor
  54         wallet       *w.Wallet
  55         accessTokens *accesstoken.CredentialStore
  56         api          *api.API
  57         chain        *protocol.Chain
  58         txfeed       *txfeed.Tracker
  59         cpuMiner     *cpuminer.CPUMiner
  60         miningPool   *miningpool.MiningPool
  61         miningEnable bool
  62 }
  63
  64 func NewNode(config *cfg.Config) *Node {
  65         ctx := context.Background()
  66         if err := lockDataDirectory(config); err != nil {
  67                 cmn.Exit("Error: " + err.Error())
  68         }
  69         initLogFile(config)
  70         initActiveNetParams(config)
  71         // Get store
  72         coreDB := dbm.NewDB("core", config.DBBackend, config.DBDir())
  73         store := leveldb.NewStore(coreDB)
  74
  75         tokenDB := dbm.NewDB("accesstoken", config.DBBackend, config.DBDir())
  76         accessTokens := accesstoken.NewStore(tokenDB)
  77
  78         // Make event switch
  79         eventSwitch := types.NewEventSwitch()
  80         if _, err := eventSwitch.Start(); err != nil {
  81                 cmn.Exit(cmn.Fmt("Failed to start switch: %v", err))
  82         }
  83
  84         txPool := protocol.NewTxPool()
  85         chain, err := protocol.NewChain(store, txPool)
  86         if err != nil {
  87                 cmn.Exit(cmn.Fmt("Failed to create chain structure: %v", err))
  88         }
  89
  90         var accounts *account.Manager = nil
  91         var assets *asset.Registry = nil
  92         var wallet *w.Wallet = nil
  93         var txFeed *txfeed.Tracker = nil
  94
  95         txFeedDB := dbm.NewDB("txfeeds", config.DBBackend, config.DBDir())
  96         txFeed = txfeed.NewTracker(txFeedDB, chain)
  97
  98         if err = txFeed.Prepare(ctx); err != nil {
  99                 log.WithField("error", err).Error("start txfeed")
 100                 return nil
 101         }
 102
 103         hsm, err := pseudohsm.New(config.KeysDir())
 104         if err != nil {
 105                 cmn.Exit(cmn.Fmt("initialize HSM failed: %v", err))
 106         }
 107
 108         if !config.Wallet.Disable {
 109                 walletDB := dbm.NewDB("wallet", config.DBBackend, config.DBDir())
 110                 accounts = account.NewManager(walletDB, chain)
 111                 assets = asset.NewRegistry(walletDB, chain)
 112                 wallet, err = w.NewWallet(walletDB, accounts, assets, hsm, chain)
 113                 if err != nil {
 114                         log.WithField("error", err).Error("init NewWallet")
 115                 }
 116
 117                 // trigger rescan wallet
 118                 if config.Wallet.Rescan {
 119                         wallet.RescanBlocks()
 120                 }
 121
 122                 // Clean up expired UTXO reservations periodically.
 123                 go accounts.ExpireReservations(ctx, expireReservationsPeriod)
 124         }
 125         newBlockCh := make(chan *bc.Hash, maxNewBlockChSize)
 126
 127         syncManager, _ := netsync.NewSyncManager(config, chain, txPool, newBlockCh)
 128
 129         // get transaction from txPool and send it to syncManager and wallet
 130         go newPoolTxListener(txPool, syncManager, wallet)
 131
 132         // run the profile server
 133         profileHost := config.ProfListenAddress
 134         if profileHost != "" {
 135                 // Profiling bytomd programs.see (https://blog.golang.org/profiling-go-programs)
 136                 // go tool pprof http://profileHose/debug/pprof/heap
 137                 go func() {
 138                         http.ListenAndServe(profileHost, nil)
 139                 }()
 140         }
 141
 142         node := &Node{
 143                 config:       config,
 144                 syncManager:  syncManager,
 145                 evsw:         eventSwitch,
 146                 accessTokens: accessTokens,
 147                 wallet:       wallet,
 148                 chain:        chain,
 149                 txfeed:       txFeed,
 150                 miningEnable: config.Mining,
 151         }
 152
 153         node.cpuMiner = cpuminer.NewCPUMiner(chain, accounts, txPool, newBlockCh)
 154         node.miningPool = miningpool.NewMiningPool(chain, accounts, txPool, newBlockCh)
 155
 156         node.BaseService = *cmn.NewBaseService(nil, "Node", node)
 157
 158         return node
 159 }
 160
 161 // newPoolTxListener listener transaction from txPool, and send it to syncManager and wallet
 162 func newPoolTxListener(txPool *protocol.TxPool, syncManager *netsync.SyncManager, wallet *w.Wallet) {
 163         newTxCh := txPool.GetNewTxCh()
 164         syncManagerTxCh := syncManager.GetNewTxCh()
 165
 166         for {
 167                 newTx := <-newTxCh
 168                 syncManagerTxCh <- newTx
 169                 if wallet != nil {
 170                         wallet.GetNewTxCh() <- newTx
 171                 }
 172         }
 173 }
 174
 175 // Lock data directory after daemonization
 176 func lockDataDirectory(config *cfg.Config) error {
 177         _, _, err := flock.New(filepath.Join(config.RootDir, "LOCK"))
 178         if err != nil {
 179                 return errors.New("datadir already used by another process")
 180         }
 181         return nil
 182 }
 183
 184 func initActiveNetParams(config *cfg.Config) {
 185         var exist bool
 186         consensus.ActiveNetParams, exist = consensus.NetParams[config.ChainID]
 187         if !exist {
 188                 cmn.Exit(cmn.Fmt("chain_id[%v] don't exist", config.ChainID))
 189         }
 190 }
 191
 192 func initLogFile(config *cfg.Config) {
 193         if config.LogFile == "" {
 194                 return
 195         }
 196         cmn.EnsureDir(filepath.Dir(config.LogFile), 0700)
 197         file, err := os.OpenFile(config.LogFile, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
 198         if err == nil {
 199                 log.SetOutput(file)
 200         } else {
 201                 log.WithField("err", err).Info("using default")
 202         }
 203
 204 }
 205
 206 // Lanch web broser or not
 207 func launchWebBrowser() {
 208         log.Info("Launching System Browser with :", webAddress)
 209         if err := browser.Open(webAddress); err != nil {
 210                 log.Error(err.Error())
 211                 return
 212         }
 213 }
 214
 215 func (n *Node) initAndstartApiServer() {
 216         n.api = api.NewAPI(n.syncManager, n.wallet, n.txfeed, n.cpuMiner, n.miningPool, n.chain, n.config, n.accessTokens)
 217
 218         listenAddr := env.String("LISTEN", n.config.ApiAddress)
 219         env.Parse()
 220         n.api.StartServer(*listenAddr)
 221 }
 222
 223 func (n *Node) OnStart() error {
 224         if n.miningEnable {
 225                 n.cpuMiner.Start()
 226         }
 227         if !n.config.VaultMode {
 228                 n.syncManager.Start()
 229         }
 230         n.initAndstartApiServer()
 231         if !n.config.Web.Closed {
 232                 launchWebBrowser()
 233         }
 234
 235         return nil
 236 }
 237
 238 func (n *Node) OnStop() {
 239         n.BaseService.OnStop()
 240         if n.miningEnable {
 241                 n.cpuMiner.Stop()
 242         }
 243         if !n.config.VaultMode {
 244                 n.syncManager.Stop()
 245         }
 246 }
 247
 248 func (n *Node) RunForever() {
 249         // Sleep forever and then...
 250         cmn.TrapSignal(func() {
 251                 n.Stop()
 252         })
 253 }
 254
 255 func (n *Node) EventSwitch() types.EventSwitch {
 256         return n.evsw
 257 }
 258
 259 func (n *Node) SyncManager() *netsync.SyncManager {
 260         return n.syncManager
 261 }
 262
 263 func (n *Node) MiningPool() *miningpool.MiningPool {
 264         return n.miningPool
 265 }