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