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253
utils/cmd.go
253
utils/cmd.go
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package utils
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import (
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"fmt"
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"github.com/ethereum/eth-go"
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"github.com/ethereum/eth-go/ethcrypto"
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"github.com/ethereum/eth-go/ethdb"
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"github.com/ethereum/eth-go/ethlog"
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"github.com/ethereum/eth-go/ethminer"
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"github.com/ethereum/eth-go/ethpub"
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"github.com/ethereum/eth-go/ethrpc"
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"github.com/ethereum/eth-go/ethutil"
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"io"
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"log"
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"os"
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"os/signal"
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"path"
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"time"
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)
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var logger = ethlog.NewLogger("CLI")
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var interruptCallbacks = []func(os.Signal){}
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// Register interrupt handlers callbacks
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func RegisterInterrupt(cb func(os.Signal)) {
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interruptCallbacks = append(interruptCallbacks, cb)
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}
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// go routine that call interrupt handlers in order of registering
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func HandleInterrupt() {
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c := make(chan os.Signal, 1)
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go func() {
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signal.Notify(c, os.Interrupt)
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for sig := range c {
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logger.Errorf("Shutting down (%v) ... \n", sig)
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RunInterruptCallbacks(sig)
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}
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}()
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}
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func RunInterruptCallbacks(sig os.Signal) {
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for _, cb := range interruptCallbacks {
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cb(sig)
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}
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}
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func AbsolutePath(Datadir string, filename string) string {
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if path.IsAbs(filename) {
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return filename
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}
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return path.Join(Datadir, filename)
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}
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func openLogFile(Datadir string, filename string) *os.File {
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path := AbsolutePath(Datadir, filename)
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file, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
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if err != nil {
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panic(fmt.Sprintf("error opening log file '%s': %v", filename, err))
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}
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return file
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}
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func confirm(message string) bool {
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fmt.Println(message, "Are you sure? (y/n)")
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var r string
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fmt.Scanln(&r)
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for ; ; fmt.Scanln(&r) {
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if r == "n" || r == "y" {
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break
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} else {
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fmt.Printf("Yes or no?", r)
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}
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}
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return r == "y"
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}
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func InitDataDir(Datadir string) {
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_, err := os.Stat(Datadir)
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if err != nil {
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if os.IsNotExist(err) {
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fmt.Printf("Data directory '%s' doesn't exist, creating it\n", Datadir)
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os.Mkdir(Datadir, 0777)
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}
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}
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}
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func InitLogging(Datadir string, LogFile string, LogLevel int, DebugFile string) {
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var writer io.Writer
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if LogFile == "" {
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writer = os.Stdout
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} else {
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writer = openLogFile(Datadir, LogFile)
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}
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ethlog.AddLogSystem(ethlog.NewStdLogSystem(writer, log.LstdFlags, ethlog.LogLevel(LogLevel)))
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if DebugFile != "" {
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writer = openLogFile(Datadir, DebugFile)
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ethlog.AddLogSystem(ethlog.NewStdLogSystem(writer, log.LstdFlags, ethlog.DebugLevel))
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}
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}
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func InitConfig(ConfigFile string, Datadir string, Identifier string, EnvPrefix string) {
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InitDataDir(Datadir)
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ethutil.ReadConfig(ConfigFile, Datadir, Identifier, EnvPrefix)
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}
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func exit(err error) {
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status := 0
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if err != nil {
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logger.Errorln("Fatal: ", err)
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status = 1
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}
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ethlog.Flush()
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os.Exit(status)
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}
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func NewDatabase() ethutil.Database {
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db, err := ethdb.NewLDBDatabase("database")
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if err != nil {
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exit(err)
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}
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return db
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}
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func NewEthereum(db ethutil.Database, keyManager *ethcrypto.KeyManager, usePnp bool, OutboundPort string, MaxPeer int) *eth.Ethereum {
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ethereum, err := eth.New(db, keyManager, eth.CapDefault, usePnp)
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if err != nil {
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logger.Fatalln("eth start err:", err)
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}
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ethereum.Port = OutboundPort
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ethereum.MaxPeers = MaxPeer
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return ethereum
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}
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func StartEthereum(ethereum *eth.Ethereum, UseSeed bool) {
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logger.Infof("Starting Ethereum v%s", ethutil.Config.Ver)
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ethereum.Start(UseSeed)
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RegisterInterrupt(func(sig os.Signal) {
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ethereum.Stop()
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ethlog.Flush()
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})
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}
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func ShowGenesis(ethereum *eth.Ethereum) {
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logger.Infoln(ethereum.BlockChain().Genesis())
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exit(nil)
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}
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func NewKeyManager(KeyStore string, Datadir string, db ethutil.Database) *ethcrypto.KeyManager {
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var keyManager *ethcrypto.KeyManager
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switch {
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case KeyStore == "db":
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keyManager = ethcrypto.NewDBKeyManager(db)
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case KeyStore == "file":
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keyManager = ethcrypto.NewFileKeyManager(Datadir)
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default:
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exit(fmt.Errorf("unknown keystore type: %s", KeyStore))
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}
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return keyManager
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}
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func KeyTasks(keyManager *ethcrypto.KeyManager, KeyRing string, GenAddr bool, SecretFile string, ExportDir string, NonInteractive bool) {
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var err error
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switch {
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case GenAddr:
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if NonInteractive || confirm("This action overwrites your old private key.") {
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err = keyManager.Init(KeyRing, 0, true)
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}
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exit(err)
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case len(SecretFile) > 0:
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if NonInteractive || confirm("This action overwrites your old private key.") {
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err = keyManager.InitFromSecretsFile(KeyRing, 0, SecretFile)
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}
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exit(err)
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case len(ExportDir) > 0:
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err = keyManager.Init(KeyRing, 0, false)
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if err == nil {
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err = keyManager.Export(ExportDir)
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}
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exit(err)
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default:
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// Creates a keypair if none exists
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err = keyManager.Init(KeyRing, 0, false)
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if err != nil {
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exit(err)
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}
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}
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}
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func StartRpc(ethereum *eth.Ethereum, RpcPort int) {
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var err error
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ethereum.RpcServer, err = ethrpc.NewJsonRpcServer(ethpub.NewPEthereum(ethereum), RpcPort)
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if err != nil {
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logger.Errorf("Could not start RPC interface (port %v): %v", RpcPort, err)
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} else {
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go ethereum.RpcServer.Start()
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}
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}
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var miner ethminer.Miner
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func StartMining(ethereum *eth.Ethereum) bool {
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if !ethereum.Mining {
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ethereum.Mining = true
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addr := ethereum.KeyManager().Address()
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go func() {
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miner = ethminer.NewDefaultMiner(addr, ethereum)
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// Give it some time to connect with peers
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time.Sleep(3 * time.Second)
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for !ethereum.IsUpToDate() == false {
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time.Sleep(5 * time.Second)
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}
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logger.Infoln("Miner started")
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miner := ethminer.NewDefaultMiner(addr, ethereum)
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miner.Start()
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}()
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RegisterInterrupt(func(os.Signal) {
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StopMining(ethereum)
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})
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return true
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}
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return false
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}
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func StopMining(ethereum *eth.Ethereum) bool {
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if ethereum.Mining {
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miner.Stop()
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logger.Infoln("Miner stopped")
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ethereum.Mining = false
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return true
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}
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return false
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}
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// Replay block
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func BlockDo(ethereum *eth.Ethereum, hash []byte) error {
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block := ethereum.BlockChain().GetBlock(hash)
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if block == nil {
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return fmt.Errorf("unknown block %x", hash)
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}
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parent := ethereum.BlockChain().GetBlock(block.PrevHash)
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_, err := ethereum.StateManager().ApplyDiff(parent.State(), parent, block)
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if err != nil {
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return err
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}
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return nil
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}
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