9b509f6478
Returning an error would indicate a complete failure initialising the Ethereum backend. Instead we should print the message and continue.
323 lines
7.2 KiB
Go
323 lines
7.2 KiB
Go
package eth
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import (
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"fmt"
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"net"
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"sync"
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"github.com/ethereum/go-ethereum/core"
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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/ethutil"
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"github.com/ethereum/go-ethereum/event"
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ethlogger "github.com/ethereum/go-ethereum/logger"
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"github.com/ethereum/go-ethereum/p2p"
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"github.com/ethereum/go-ethereum/pow/ezp"
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"github.com/ethereum/go-ethereum/rpc"
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"github.com/ethereum/go-ethereum/whisper"
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)
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const (
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seedNodeAddress = "poc-8.ethdev.com:30303"
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)
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type Config struct {
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Name string
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Version string
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Identifier string
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KeyStore string
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DataDir string
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LogFile string
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LogLevel int
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KeyRing string
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MaxPeers int
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Port string
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NATType string
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PMPGateway string
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Shh bool
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Dial bool
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KeyManager *crypto.KeyManager
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}
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var logger = ethlogger.NewLogger("SERV")
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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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quit chan bool
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// DB interface
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db ethutil.Database
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blacklist p2p.Blacklist
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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
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whisper *whisper.Whisper
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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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RpcServer *rpc.JsonRpcServer
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keyManager *crypto.KeyManager
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clientIdentity p2p.ClientIdentity
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logger ethlogger.LogSystem
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synclock sync.Mutex
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syncGroup sync.WaitGroup
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Mining bool
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}
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func New(config *Config) (*Ethereum, error) {
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// Boostrap database
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logger := ethlogger.New(config.DataDir, config.LogFile, config.LogLevel)
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db, err := ethdb.NewLDBDatabase("blockchain")
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if err != nil {
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return nil, err
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}
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// Perform database sanity checks
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d, _ := db.Get([]byte("ProtocolVersion"))
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protov := ethutil.NewValue(d).Uint()
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if protov != ProtocolVersion && protov != 0 {
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return nil, fmt.Errorf("Database version mismatch. Protocol(%d / %d). `rm -rf %s`", protov, ProtocolVersion, ethutil.Config.ExecPath+"/database")
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}
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// Create new keymanager
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var keyManager *crypto.KeyManager
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switch config.KeyStore {
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case "db":
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keyManager = crypto.NewDBKeyManager(db)
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case "file":
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keyManager = crypto.NewFileKeyManager(config.DataDir)
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default:
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return nil, fmt.Errorf("unknown keystore type: %s", config.KeyStore)
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}
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// Initialise the keyring
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keyManager.Init(config.KeyRing, 0, false)
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// Create a new client id for this instance. This will help identifying the node on the network
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clientId := p2p.NewSimpleClientIdentity(config.Name, config.Version, config.Identifier, keyManager.PublicKey())
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saveProtocolVersion(db)
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//ethutil.Config.Db = db
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eth := &Ethereum{
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shutdownChan: make(chan bool),
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quit: make(chan bool),
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db: db,
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keyManager: keyManager,
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clientIdentity: clientId,
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blacklist: p2p.NewBlacklist(),
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eventMux: &event.TypeMux{},
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logger: logger,
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}
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eth.chainManager = core.NewChainManager(db, eth.EventMux())
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eth.txPool = core.NewTxPool(eth.EventMux())
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eth.blockProcessor = core.NewBlockProcessor(db, 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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hasBlock := eth.chainManager.HasBlock
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insertChain := eth.chainManager.InsertChain
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eth.blockPool = NewBlockPool(hasBlock, insertChain, ezp.Verify)
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ethProto := EthProtocol(eth.txPool, eth.chainManager, eth.blockPool)
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protocols := []p2p.Protocol{ethProto, eth.whisper.Protocol()}
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nat, err := p2p.ParseNAT(config.NATType, config.PMPGateway)
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if err != nil {
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return nil, err
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}
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fmt.Println(nat)
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eth.net = &p2p.Server{
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Identity: clientId,
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MaxPeers: config.MaxPeers,
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Protocols: protocols,
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Blacklist: eth.blacklist,
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NAT: p2p.UPNP(),
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NoDial: !config.Dial,
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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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return eth, nil
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}
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func (s *Ethereum) KeyManager() *crypto.KeyManager {
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return s.keyManager
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}
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func (s *Ethereum) Logger() ethlogger.LogSystem {
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return s.logger
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}
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func (s *Ethereum) ClientIdentity() p2p.ClientIdentity {
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return s.clientIdentity
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}
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func (s *Ethereum) ChainManager() *core.ChainManager {
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return s.chainManager
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}
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func (s *Ethereum) BlockProcessor() *core.BlockProcessor {
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return s.blockProcessor
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}
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func (s *Ethereum) TxPool() *core.TxPool {
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return s.txPool
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}
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func (s *Ethereum) BlockPool() *BlockPool {
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return s.blockPool
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}
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func (s *Ethereum) Whisper() *whisper.Whisper {
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return s.whisper
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}
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func (s *Ethereum) EventMux() *event.TypeMux {
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return s.eventMux
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}
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func (self *Ethereum) Db() ethutil.Database {
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return self.db
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}
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func (s *Ethereum) IsMining() bool {
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return s.Mining
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}
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func (s *Ethereum) IsListening() bool {
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// XXX TODO
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return false
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}
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func (s *Ethereum) PeerCount() int {
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return s.net.PeerCount()
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}
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func (s *Ethereum) Peers() []*p2p.Peer {
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return s.net.Peers()
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}
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func (s *Ethereum) MaxPeers() int {
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return s.net.MaxPeers
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}
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// Start the ethereum
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func (s *Ethereum) Start(seed bool) error {
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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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// TODO: read peers here
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if seed {
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logger.Infof("Connect to seed node %v", seedNodeAddress)
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if err := s.SuggestPeer(seedNodeAddress); err != nil {
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logger.Infoln(err)
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}
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}
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logger.Infoln("Server started")
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return nil
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}
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func (self *Ethereum) SuggestPeer(addr string) error {
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netaddr, err := net.ResolveTCPAddr("tcp", addr)
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if err != nil {
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logger.Errorf("couldn't resolve %s:", addr, err)
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return err
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}
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self.net.SuggestPeer(netaddr.IP, netaddr.Port, nil)
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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.db.Close()
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close(s.quit)
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s.txSub.Unsubscribe() // quits txBroadcastLoop
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s.blockSub.Unsubscribe() // quits blockBroadcastLoop
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if s.RpcServer != nil {
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s.RpcServer.Stop()
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}
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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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logger.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 ethutil.Database) {
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d, _ := db.Get([]byte("ProtocolVersion"))
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protocolVersion := ethutil.NewValue(d).Uint()
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if protocolVersion == 0 {
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db.Put([]byte("ProtocolVersion"), ethutil.NewValue(ProtocolVersion).Bytes())
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}
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}
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