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/common" "github.com/ethereum/go-ethereum/core" "github.com/ethereum/go-ethereum/core/types" "github.com/ethereum/go-ethereum/crypto" "github.com/ethereum/go-ethereum/ethdb" "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/vm" "github.com/ethereum/go-ethereum/whisper" ) var ( servlogger = 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 ProtocolVersion int NetworkId int DataDir string LogFile string LogLevel int LogFormat string VmDebug bool 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.Manager // NewDB is used to create databases. // If nil, the default is to create leveldb databases on disk. NewDB func(path string) (common.Database, error) } 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 { servlogger.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 { servlogger.Errorln("could not persist nodekey: ", err) } return key, nil } type Ethereum struct { // Channel for shutting down the ethereum shutdownChan chan bool // DB interfaces blockDb common.Database // Block chain database stateDb common.Database // State changes database extraDb common.Database // Extra database (txs, etc) //*** 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.Manager whisper *whisper.Whisper pow *ethash.Ethash net *p2p.Server eventMux *event.TypeMux txSub event.Subscription blockSub event.Subscription miner *miner.Miner logger logger.LogSystem Mining bool DataDir string version string ProtocolVersion int NetworkId int } func New(config *Config) (*Ethereum, error) { // Boostrap database servlogsystem := logger.New(config.DataDir, config.LogFile, config.LogLevel, config.LogFormat) newdb := config.NewDB if newdb == nil { newdb = func(path string) (common.Database, error) { return ethdb.NewLDBDatabase(path) } } blockDb, err := newdb(path.Join(config.DataDir, "blockchain")) if err != nil { return nil, err } stateDb, err := newdb(path.Join(config.DataDir, "state")) if err != nil { return nil, err } extraDb, err := ethdb.NewLDBDatabase(path.Join(config.DataDir, "extra")) // Perform database sanity checks d, _ := extraDb.Get([]byte("ProtocolVersion")) protov := int(common.NewValue(d).Uint()) if protov != config.ProtocolVersion && protov != 0 { path := path.Join(config.DataDir, "blockchain") return nil, fmt.Errorf("Database version mismatch. Protocol(%d / %d). `rm -rf %s`", protov, config.ProtocolVersion, path) } saveProtocolVersion(extraDb, config.ProtocolVersion) servlogger.Infof("Protocol Version: %v, Network Id: %v", config.ProtocolVersion, config.NetworkId) eth := &Ethereum{ shutdownChan: make(chan bool), blockDb: blockDb, stateDb: stateDb, extraDb: extraDb, eventMux: &event.TypeMux{}, logger: servlogsystem, accountManager: config.AccountManager, DataDir: config.DataDir, version: config.Name, // TODO should separate from Name } eth.chainManager = core.NewChainManager(blockDb, stateDb, eth.EventMux()) eth.pow = ethash.New(eth.chainManager) eth.txPool = core.NewTxPool(eth.EventMux()) eth.blockProcessor = core.NewBlockProcessor(stateDb, extraDb, eth.pow, eth.txPool, eth.chainManager, eth.EventMux()) eth.chainManager.SetProcessor(eth.blockProcessor) eth.whisper = whisper.New() eth.miner = miner.New(eth, eth.pow, config.MinerThreads) hasBlock := eth.chainManager.HasBlock insertChain := eth.chainManager.InsertChain eth.blockPool = blockpool.New(hasBlock, insertChain, eth.pow.Verify) netprv, err := config.nodeKey() if err != nil { return nil, err } ethProto := EthProtocol(config.ProtocolVersion, config.NetworkId, 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 } vm.Debug = config.VmDebug return eth, nil } type NodeInfo struct { Name string NodeUrl string NodeID string IP string DiscPort int // UDP listening port for discovery protocol TCPPort int // TCP listening port for RLPx Td string ListenAddr string } func (s *Ethereum) NodeInfo() *NodeInfo { node := s.net.Self() return &NodeInfo{ Name: s.Name(), NodeUrl: node.String(), NodeID: node.ID.String(), IP: node.IP.String(), DiscPort: node.DiscPort, TCPPort: node.TCPPort, ListenAddr: s.net.ListenAddr, Td: s.ChainManager().Td().String(), } } type PeerInfo struct { ID string Name string Caps string RemoteAddress string LocalAddress string } func newPeerInfo(peer *p2p.Peer) *PeerInfo { var caps []string for _, cap := range peer.Caps() { caps = append(caps, cap.String()) } return &PeerInfo{ ID: peer.ID().String(), Name: peer.Name(), Caps: strings.Join(caps, ", "), RemoteAddress: peer.RemoteAddr().String(), LocalAddress: peer.LocalAddr().String(), } } // PeersInfo returns an array of PeerInfo objects describing connected peers func (s *Ethereum) PeersInfo() (peersinfo []*PeerInfo) { for _, peer := range s.net.Peers() { if peer != nil { peersinfo = append(peersinfo, newPeerInfo(peer)) } } return } func (s *Ethereum) ResetWithGenesisBlock(gb *types.Block) { s.chainManager.ResetWithGenesisBlock(gb) s.pow.UpdateCache(true) } func (s *Ethereum) StartMining() error { cb, err := s.accountManager.Coinbase() if err != nil { servlogger.Errorf("Cannot start mining without coinbase: %v\n", err) return fmt.Errorf("no coinbase: %v", err) } s.miner.Start(common.BytesToAddress(cb)) return nil } func (s *Ethereum) StopMining() { s.miner.Stop() } func (s *Ethereum) IsMining() bool { return s.miner.Mining() } func (s *Ethereum) Logger() logger.LogSystem { return s.logger } func (s *Ethereum) Name() string { return s.net.Name } func (s *Ethereum) AccountManager() *accounts.Manager { 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) BlockDb() common.Database { return s.blockDb } func (s *Ethereum) StateDb() common.Database { return s.stateDb } func (s *Ethereum) ExtraDb() common.Database { return s.extraDb } 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 } func (s *Ethereum) Version() string { return s.version } // Start the ethereum func (s *Ethereum) Start() error { jsonlogger.LogJson(&logger.LogStarting{ ClientString: s.net.Name, ProtocolVersion: ProtocolVersion, }) if s.net.MaxPeers > 0 { 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() servlogger.Infoln("Server started") return nil } func (s *Ethereum) StartForTest() { jsonlogger.LogJson(&logger.LogStarting{ ClientString: s.net.Name, ProtocolVersion: ProtocolVersion, }) // Start services s.txPool.Start() s.blockPool.Start() } 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.blockDb.Close() defer s.stateDb.Close() defer s.extraDb.Close() s.txSub.Unsubscribe() // quits txBroadcastLoop s.blockSub.Unsubscribe() // quits blockBroadcastLoop s.txPool.Stop() s.eventMux.Stop() s.blockPool.Stop() if s.whisper != nil { s.whisper.Stop() } servlogger.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 common.Database, protov int) { d, _ := db.Get([]byte("ProtocolVersion")) protocolVersion := common.NewValue(d).Uint() if protocolVersion == 0 { db.Put([]byte("ProtocolVersion"), common.NewValue(protov).Bytes()) } }