path: root/ethereum/ethereum.go

package main

import (
    "fmt"
    "github.com/ethereum/eth-go"
    "github.com/ethereum/eth-go/ethchain"
    "github.com/ethereum/eth-go/ethutil"
    "github.com/ethereum/go-ethereum/utils"
    "io/ioutil"
    "log"
    "os"
    "os/signal"
    "runtime"
    "strings"
)

const Debug = true

func RegisterInterrupt(cb func(os.Signal)) {
    go func() {
        // Buffered chan of one is enough
        c := make(chan os.Signal, 1)
        // Notify about interrupts for now
        signal.Notify(c, os.Interrupt)

        for sig := range c {
            cb(sig)
        }
    }()
}

func confirm(message string) bool {
    fmt.Println(message, "Are you sure? (y/n)")
    var r string
    fmt.Scanln(&r)
    for ; ; fmt.Scanln(&r) {
        if r == "n" || r == "y" {
            break
        } else {
            fmt.Printf("Yes or no?", r)
        }
    }
    return r == "y"
}

func main() {
    Init()

    runtime.GOMAXPROCS(runtime.NumCPU())

    // set logger
    var logSys *log.Logger
    flags := log.LstdFlags

    if StartJsConsole || len(InputFile) > 0 {
        ethutil.ReadConfig(DataDir, ethutil.LogFile)
    } else {
        ethutil.ReadConfig(DataDir, ethutil.LogFile|ethutil.LogStd)
    }

    logger := ethutil.Config.Log

    if LogFile != "" {
        logfile, err := os.OpenFile(LogFile, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
        if err != nil {
            panic(fmt.Sprintf("error opening log file '%s': %v", LogFile, err))
        }
        defer logfile.Close()
        log.SetOutput(logfile)
        logSys = log.New(logfile, "", flags)
        logger.AddLogSystem(logSys)
    } else {
        logSys = log.New(os.Stdout, "", flags)
    }

    ethchain.InitFees()

    // Instantiated a eth stack
    ethereum, err := eth.New(eth.CapDefault, UseUPnP)
    if err != nil {
        log.Println("eth start err:", err)
        return
    }
    ethereum.Port = OutboundPort

    // bookkeeping tasks
    switch {
    case GenAddr:
        if NonInteractive || confirm("This action overwrites your old private key.") {
            utils.CreateKeyPair(true)
        }
        os.Exit(0)
    case len(ImportKey) > 0:
        if NonInteractive || confirm("This action overwrites your old private key.") {
            mnemonic := strings.Split(ImportKey, " ")
            if len(mnemonic) == 24 {
                logSys.Println("Got mnemonic key, importing.")
                key := ethutil.MnemonicDecode(mnemonic)
                utils.ImportPrivateKey(key)
            } else if len(mnemonic) == 1 {
                logSys.Println("Got hex key, importing.")
                utils.ImportPrivateKey(ImportKey)
            } else {
                logSys.Println("Did not recognise format, exiting.")
            }
        }
        os.Exit(0)
    case ExportKey:
        keyPair := ethutil.GetKeyRing().Get(0)
        fmt.Printf(`
Generating new address and keypair.
Please keep your keys somewhere save.

++++++++++++++++ KeyRing +++++++++++++++++++
addr: %x
prvk: %x
pubk: %x
++++++++++++++++++++++++++++++++++++++++++++
save these words so you can restore your account later: %s
`, keyPair.Address(), keyPair.PrivateKey, keyPair.PublicKey)

        os.Exit(0)
    case ShowGenesis:
        logSys.Println(ethereum.BlockChain().Genesis())
        os.Exit(0)
    default:
        // Creates a keypair if non exists
        utils.CreateKeyPair(false)
    }

    // client
    logger.Infoln(fmt.Sprintf("Starting Ethereum v%s", ethutil.Config.Ver))

    // Set the max peers
    ethereum.MaxPeers = MaxPeer

    // Set Mining status
    ethereum.Mining = StartMining

    if StartMining {
        utils.DoMining(ethereum)
    }

    if StartJsConsole {
        repl := NewJSRepl(ethereum)

        go repl.Start()

        RegisterInterrupt(func(os.Signal) {
            repl.Stop()
        })
    } else if len(InputFile) > 0 {
        file, err := os.Open(InputFile)
        if err != nil {
            ethutil.Config.Log.Fatal(err)
        }

        content, err := ioutil.ReadAll(file)
        if err != nil {
            ethutil.Config.Log.Fatal(err)
        }

        re := NewJSRE(ethereum)
        RegisterInterrupt(func(os.Signal) {
            re.Stop()
        })
        re.Run(string(content))
    }

    if StartRpc {
        utils.DoRpc(ethereum, RpcPort)
    }

    RegisterInterrupt(func(sig os.Signal) {
        fmt.Printf("Shutting down (%v) ... \n", sig)
        ethereum.Stop()
    })

    ethereum.Start(UseSeed)

    // Wait for shutdown
    ethereum.WaitForShutdown()
}