package eth
import (
"fmt"
"net"
"sync"
"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/p2p"
"github.com/ethereum/go-ethereum/pow/ezp"
"github.com/ethereum/go-ethereum/rpc"
"github.com/ethereum/go-ethereum/whisper"
)
const (
seedNodeAddress = "poc-8.ethdev.com:30303"
)
type Config struct {
Name string
Version string
Identifier string
KeyStore string
DataDir string
LogFile string
LogLevel int
LogFormat string
KeyRing string
MaxPeers int
Port string
NATType string
PMPGateway string
Shh bool
Dial bool
KeyManager *crypto.KeyManager
}
var logger = ethlogger.NewLogger("SERV")
var jsonlogger = ethlogger.NewJsonLogger()
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
RpcServer *rpc.JsonRpcServer
keyManager *crypto.KeyManager
clientIdentity p2p.ClientIdentity
logger ethlogger.LogSystem
synclock sync.Mutex
syncGroup sync.WaitGroup
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)
// Create a new client id for this instance. This will help identifying the node on the network
clientId := p2p.NewSimpleClientIdentity(config.Name, config.Version, config.Identifier, keyManager.PublicKey())
saveProtocolVersion(db)
//ethutil.Config.Db = db
eth := &Ethereum{
shutdownChan: make(chan bool),
quit: make(chan bool),
db: db,
keyManager: keyManager,
clientIdentity: clientId,
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()
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, eth.whisper.Protocol()}
nat, err := p2p.ParseNAT(config.NATType, config.PMPGateway)
if err != nil {
return nil, err
}
fmt.Println(nat)
eth.net = &p2p.Server{
Identity: clientId,
MaxPeers: config.MaxPeers,
Protocols: protocols,
Blacklist: eth.blacklist,
NAT: p2p.UPNP(),
NoDial: !config.Dial,
}
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) ClientIdentity() p2p.ClientIdentity {
return s.clientIdentity
}
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 (self *Ethereum) Db() ethutil.Database {
return self.db
}
func (s *Ethereum) IsMining() bool {
return s.Mining
}
func (s *Ethereum) IsListening() bool {
// XXX TODO
return false
}
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(seed bool) error {
evd := map[string]interface{}{
"version_string": s.ClientIdentity().String(),
"guid": ethutil.Bytes2Hex(s.ClientIdentity().Pubkey()),
"level": "debug",
"coinbase": ethutil.Bytes2Hex(s.KeyManager().Address()),
"eth_version": ProtocolVersion,
}
jsonlogger.LogJson("starting", evd)
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()
// TODO: read peers here
if seed {
logger.Infof("Connect to seed node %v", seedNodeAddress)
if err := s.SuggestPeer(seedNodeAddress); err != nil {
logger.Infoln(err)
}
}
logger.Infoln("Server started")
return nil
}
func (self *Ethereum) SuggestPeer(addr string) error {
netaddr, err := net.ResolveTCPAddr("tcp", addr)
if err != nil {
logger.Errorf("couldn't resolve %s:", addr, err)
return err
}
self.net.SuggestPeer(netaddr.IP, netaddr.Port, nil)
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()
}
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())
}
}
