package eth import ( "crypto/ecdsa" "fmt" "io/ioutil" "path" "strings" "github.com/ethereum/ethash" "github.com/ethereum/go-ethereum/accounts" "github.com/ethereum/go-ethereum/blockpool" "github.com/ethereum/go-ethereum/core" "github.com/ethereum/go-ethereum/crypto" "github.com/ethereum/go-ethereum/ethdb" "github.com/ethereum/go-ethereum/ethutil" "github.com/ethereum/go-ethereum/event" "github.com/ethereum/go-ethereum/logger" "github.com/ethereum/go-ethereum/miner" "github.com/ethereum/go-ethereum/p2p" "github.com/ethereum/go-ethereum/p2p/discover" "github.com/ethereum/go-ethereum/p2p/nat" "github.com/ethereum/go-ethereum/rpc" "github.com/ethereum/go-ethereum/whisper" ) var ( ethlogger = logger.NewLogger("SERV") jsonlogger = logger.NewJsonLogger() defaultBootNodes = []*discover.Node{ // ETH/DEV cmd/bootnode discover.MustParseNode("enode://6cdd090303f394a1cac34ecc9f7cda18127eafa2a3a06de39f6d920b0e583e062a7362097c7c65ee490a758b442acd5c80c6fce4b148c6a391e946b45131365b@54.169.166.226:30303"), // ETH/DEV cpp-ethereum (poc-8.ethdev.com) discover.MustParseNode("enode://4a44599974518ea5b0f14c31c4463692ac0329cb84851f3435e6d1b18ee4eae4aa495f846a0fa1219bd58035671881d44423876e57db2abd57254d0197da0ebe@5.1.83.226:30303"), } ) type Config struct { Name string DataDir string LogFile string LogLevel int LogFormat string MaxPeers int Port string // This should be a space-separated list of // discovery node URLs. BootNodes string // This key is used to identify the node on the network. // If nil, an ephemeral key is used. NodeKey *ecdsa.PrivateKey NAT nat.Interface Shh bool Dial bool MinerThreads int AccountManager *accounts.AccountManager } func (cfg *Config) parseBootNodes() []*discover.Node { if cfg.BootNodes == "" { return defaultBootNodes } var ns []*discover.Node for _, url := range strings.Split(cfg.BootNodes, " ") { if url == "" { continue } n, err := discover.ParseNode(url) if err != nil { ethlogger.Errorf("Bootstrap URL %s: %v\n", url, err) continue } ns = append(ns, n) } return ns } func (cfg *Config) nodeKey() (*ecdsa.PrivateKey, error) { // use explicit key from command line args if set if cfg.NodeKey != nil { return cfg.NodeKey, nil } // use persistent key if present keyfile := path.Join(cfg.DataDir, "nodekey") key, err := crypto.LoadECDSA(keyfile) if err == nil { return key, nil } // no persistent key, generate and store a new one if key, err = crypto.GenerateKey(); err != nil { return nil, fmt.Errorf("could not generate server key: %v", err) } if err := ioutil.WriteFile(keyfile, crypto.FromECDSA(key), 0600); err != nil { ethlogger.Errorln("could not persist nodekey: ", err) } return key, nil } type Ethereum struct { // Channel for shutting down the ethereum shutdownChan chan bool // DB interface db ethutil.Database //*** SERVICES *** // State manager for processing new blocks and managing the over all states blockProcessor *core.BlockProcessor txPool *core.TxPool chainManager *core.ChainManager blockPool *blockpool.BlockPool accountManager *accounts.AccountManager whisper *whisper.Whisper net *p2p.Server eventMux *event.TypeMux txSub event.Subscription blockSub event.Subscription miner *miner.Miner RpcServer rpc.RpcServer logger logger.LogSystem Mining bool DataDir string } func New(config *Config) (*Ethereum, error) { // Boostrap database ethlogger := logger.New(config.DataDir, config.LogFile, config.LogLevel, config.LogFormat) db, err := ethdb.NewLDBDatabase(path.Join(config.DataDir, "blockchain")) if err != nil { return nil, err } // Perform database sanity checks d, _ := db.Get([]byte("ProtocolVersion")) protov := ethutil.NewValue(d).Uint() if protov != ProtocolVersion && protov != 0 { path := path.Join(config.DataDir, "blockchain") return nil, fmt.Errorf("Database version mismatch. Protocol(%d / %d). `rm -rf %s`", protov, ProtocolVersion, path) } saveProtocolVersion(db) //ethutil.Config.Db = db eth := &Ethereum{ shutdownChan: make(chan bool), db: db, eventMux: &event.TypeMux{}, logger: ethlogger, accountManager: config.AccountManager, DataDir: config.DataDir, } cb, err := eth.accountManager.Coinbase() if err != nil { return nil, fmt.Errorf("no coinbase: %v", err) } eth.chainManager = core.NewChainManager(db, eth.EventMux()) pow := ethash.New(eth.chainManager) eth.txPool = core.NewTxPool(eth.EventMux()) eth.blockProcessor = core.NewBlockProcessor(db, pow, eth.txPool, eth.chainManager, eth.EventMux()) eth.chainManager.SetProcessor(eth.blockProcessor) eth.whisper = whisper.New() eth.miner = miner.New(cb, eth, pow, config.MinerThreads) hasBlock := eth.chainManager.HasBlock insertChain := eth.chainManager.InsertChain eth.blockPool = blockpool.New(hasBlock, insertChain, pow.Verify) netprv, err := config.nodeKey() if err != nil { return nil, err } ethProto := EthProtocol(eth.txPool, eth.chainManager, eth.blockPool) protocols := []p2p.Protocol{ethProto} if config.Shh { protocols = append(protocols, eth.whisper.Protocol()) } eth.net = &p2p.Server{ PrivateKey: netprv, Name: config.Name, MaxPeers: config.MaxPeers, Protocols: protocols, NAT: config.NAT, NoDial: !config.Dial, BootstrapNodes: config.parseBootNodes(), } if len(config.Port) > 0 { eth.net.ListenAddr = ":" + config.Port } return eth, nil } func (s *Ethereum) Logger() logger.LogSystem { return s.logger } func (s *Ethereum) Name() string { return s.net.Name } func (s *Ethereum) AccountManager() *accounts.AccountManager { return s.accountManager } func (s *Ethereum) ChainManager() *core.ChainManager { return s.chainManager } func (s *Ethereum) BlockProcessor() *core.BlockProcessor { return s.blockProcessor } func (s *Ethereum) TxPool() *core.TxPool { return s.txPool } func (s *Ethereum) BlockPool() *blockpool.BlockPool { return s.blockPool } func (s *Ethereum) Whisper() *whisper.Whisper { return s.whisper } func (s *Ethereum) EventMux() *event.TypeMux { return s.eventMux } func (s *Ethereum) Db() ethutil.Database { return s.db } func (s *Ethereum) Miner() *miner.Miner { return s.miner } func (s *Ethereum) IsListening() bool { return true } // Always listening func (s *Ethereum) PeerCount() int { return s.net.PeerCount() } func (s *Ethereum) Peers() []*p2p.Peer { return s.net.Peers() } func (s *Ethereum) MaxPeers() int { return s.net.MaxPeers } // Start the ethereum func (s *Ethereum) Start() error { jsonlogger.LogJson(&logger.LogStarting{ ClientString: s.net.Name, ProtocolVersion: ProtocolVersion, }) err := s.net.Start() if err != nil { return err } // Start services s.txPool.Start() s.blockPool.Start() if s.whisper != nil { s.whisper.Start() } // broadcast transactions s.txSub = s.eventMux.Subscribe(core.TxPreEvent{}) go s.txBroadcastLoop() // broadcast mined blocks s.blockSub = s.eventMux.Subscribe(core.NewMinedBlockEvent{}) go s.blockBroadcastLoop() ethlogger.Infoln("Server started") return nil } func (self *Ethereum) SuggestPeer(nodeURL string) error { n, err := discover.ParseNode(nodeURL) if err != nil { return fmt.Errorf("invalid node URL: %v", err) } self.net.SuggestPeer(n) return nil } func (s *Ethereum) Stop() { // Close the database defer s.db.Close() s.txSub.Unsubscribe() // quits txBroadcastLoop s.blockSub.Unsubscribe() // quits blockBroadcastLoop if s.RpcServer != nil { s.RpcServer.Stop() } s.txPool.Stop() s.eventMux.Stop() s.blockPool.Stop() if s.whisper != nil { s.whisper.Stop() } ethlogger.Infoln("Server stopped") close(s.shutdownChan) } // This function will wait for a shutdown and resumes main thread execution func (s *Ethereum) WaitForShutdown() { <-s.shutdownChan } // now tx broadcasting is taken out of txPool // handled here via subscription, efficiency? func (self *Ethereum) txBroadcastLoop() { // automatically stops if unsubscribe for obj := range self.txSub.Chan() { event := obj.(core.TxPreEvent) self.net.Broadcast("eth", TxMsg, event.Tx.RlpData()) } } func (self *Ethereum) blockBroadcastLoop() { // automatically stops if unsubscribe for obj := range self.blockSub.Chan() { switch ev := obj.(type) { case core.NewMinedBlockEvent: self.net.Broadcast("eth", NewBlockMsg, ev.Block.RlpData(), ev.Block.Td) } } } func saveProtocolVersion(db ethutil.Database) { d, _ := db.Get([]byte("ProtocolVersion")) protocolVersion := ethutil.NewValue(d).Uint() if protocolVersion == 0 { db.Put([]byte("ProtocolVersion"), ethutil.NewValue(ProtocolVersion).Bytes()) } }