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/ethminer"
    "github.com/ethereum/eth-go/ethutil"
    "github.com/ethereum/go-ethereum/utils"
    "log"
    "os"
    "os/signal"
    "runtime"
    "strings"
)

const Debug = true

// Register interrupt handlers so we can stop the ethereum
func RegisterInterrupts(s *eth.Ethereum) {
    // Buffered chan of one is enough
    c := make(chan os.Signal, 1)
    // Notify about interrupts for now
    signal.Notify(c, os.Interrupt)
    go func() {
        for sig := range c {
            fmt.Printf("Shutting down (%v) ... \n", sig)
            s.Stop()
        }
    }()
}

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

    ethutil.ReadConfig(DataDir)
    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()
    ethutil.Config.Seed = UseSeed

    // 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:
        key := ethutil.Config.Db.GetKeys()[0]
        logSys.Println(fmt.Sprintf("prvk: %x\n", key.PrivateKey))
        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

    if StartConsole {
        err := os.Mkdir(ethutil.Config.ExecPath, os.ModePerm)
        // Error is OK if the error is ErrExist
        if err != nil && !os.IsExist(err) {
            log.Panic("Unable to create EXECPATH:", err)
        }

        console := NewConsole(ethereum)
        go console.Start()
    }

    RegisterInterrupts(ethereum)
    ethereum.Start()

    if StartMining {
        logger.Infoln("Miner started")

        // Fake block mining. It broadcasts a new block every 5 seconds
        go func() {

            if StartMining {
                logger.Infoln("Miner started")

                go func() {
                    data, _ := ethutil.Config.Db.Get([]byte("KeyRing"))
                    keyRing := ethutil.NewValueFromBytes(data)
                    addr := keyRing.Get(1).Bytes()

                    miner := ethminer.NewDefaultMiner(addr, ethereum)
                    miner.Start()

                }()
            }
        }()

    }

    // Wait for shutdown
    ethereum.WaitForShutdown()
}