diff options
Diffstat (limited to 'eth/backend.go')
| -rw-r--r-- | eth/backend.go | 309 |
1 files changed, 309 insertions, 0 deletions
diff --git a/eth/backend.go b/eth/backend.go new file mode 100644 index 000000000..b57e9fd69 --- /dev/null +++ b/eth/backend.go @@ -0,0 +1,309 @@ +package eth + +import ( + "crypto/ecdsa" + "fmt" + "strings" + + "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" + ethlogger "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/pow/ezp" + "github.com/ethereum/go-ethereum/rpc" + "github.com/ethereum/go-ethereum/whisper" +) + +var ( + logger = ethlogger.NewLogger("SERV") + jsonlogger = ethlogger.NewJsonLogger() + + defaultBootNodes = []*discover.Node{ + discover.MustParseNode("enode://6cdd090303f394a1cac34ecc9f7cda18127eafa2a3a06de39f6d920b0e583e062a7362097c7c65ee490a758b442acd5c80c6fce4b148c6a391e946b45131365b@54.169.166.226:30303"), + } +) + +type Config struct { + Name string + KeyStore string + DataDir string + LogFile string + LogLevel int + KeyRing string + 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 + + KeyManager *crypto.KeyManager +} + +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 { + logger.Errorf("Bootstrap URL %s: %v\n", url, err) + continue + } + ns = append(ns, n) + } + return ns +} + +type Ethereum struct { + // Channel for shutting down the ethereum + shutdownChan chan bool + quit chan bool + + // DB interface + db ethutil.Database + blacklist p2p.Blacklist + + //*** SERVICES *** + // State manager for processing new blocks and managing the over all states + blockProcessor *core.BlockProcessor + txPool *core.TxPool + chainManager *core.ChainManager + blockPool *BlockPool + whisper *whisper.Whisper + + net *p2p.Server + eventMux *event.TypeMux + txSub event.Subscription + blockSub event.Subscription + miner *miner.Miner + + RpcServer rpc.RpcServer + WsServer rpc.RpcServer + keyManager *crypto.KeyManager + + logger ethlogger.LogSystem + + Mining bool +} + +func New(config *Config) (*Ethereum, error) { + // Boostrap database + logger := ethlogger.New(config.DataDir, config.LogFile, config.LogLevel, config.LogFormat) + db, err := ethdb.NewLDBDatabase("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 { + return nil, fmt.Errorf("Database version mismatch. Protocol(%d / %d). `rm -rf %s`", protov, ProtocolVersion, ethutil.Config.ExecPath+"/database") + } + + // Create new keymanager + var keyManager *crypto.KeyManager + switch config.KeyStore { + case "db": + keyManager = crypto.NewDBKeyManager(db) + case "file": + keyManager = crypto.NewFileKeyManager(config.DataDir) + default: + return nil, fmt.Errorf("unknown keystore type: %s", config.KeyStore) + } + // Initialise the keyring + keyManager.Init(config.KeyRing, 0, false) + + saveProtocolVersion(db) + //ethutil.Config.Db = db + + eth := &Ethereum{ + shutdownChan: make(chan bool), + quit: make(chan bool), + db: db, + keyManager: keyManager, + blacklist: p2p.NewBlacklist(), + eventMux: &event.TypeMux{}, + logger: logger, + } + + eth.chainManager = core.NewChainManager(db, eth.EventMux()) + eth.txPool = core.NewTxPool(eth.EventMux()) + eth.blockProcessor = core.NewBlockProcessor(db, eth.txPool, eth.chainManager, eth.EventMux()) + eth.chainManager.SetProcessor(eth.blockProcessor) + eth.whisper = whisper.New() + eth.miner = miner.New(keyManager.Address(), eth, config.MinerThreads) + + hasBlock := eth.chainManager.HasBlock + insertChain := eth.chainManager.InsertChain + eth.blockPool = NewBlockPool(hasBlock, insertChain, ezp.Verify) + + ethProto := EthProtocol(eth.txPool, eth.chainManager, eth.blockPool) + protocols := []p2p.Protocol{ethProto} + if config.Shh { + protocols = append(protocols, eth.whisper.Protocol()) + } + + netprv := config.NodeKey + if netprv == nil { + if netprv, err = crypto.GenerateKey(); err != nil { + return nil, fmt.Errorf("could not generate server key: %v", err) + } + } + eth.net = &p2p.Server{ + PrivateKey: netprv, + Name: config.Name, + MaxPeers: config.MaxPeers, + Protocols: protocols, + Blacklist: eth.blacklist, + 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) KeyManager() *crypto.KeyManager { return s.keyManager } +func (s *Ethereum) Logger() ethlogger.LogSystem { return s.logger } +func (s *Ethereum) Name() string { return s.net.Name } +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 { 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 } +func (s *Ethereum) Coinbase() []byte { return nil } // TODO + +// Start the ethereum +func (s *Ethereum) Start() error { + jsonlogger.LogJson(ðlogger.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() + + logger.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() + + close(s.quit) + + s.txSub.Unsubscribe() // quits txBroadcastLoop + s.blockSub.Unsubscribe() // quits blockBroadcastLoop + + if s.RpcServer != nil { + s.RpcServer.Stop() + } + if s.WsServer != nil { + s.WsServer.Stop() + } + s.txPool.Stop() + s.eventMux.Stop() + s.blockPool.Stop() + if s.whisper != nil { + s.whisper.Stop() + } + + logger.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()) + } +} |