package utils
import (
"fmt"
"github.com/ethereum/eth-go"
"github.com/ethereum/eth-go/ethlog"
"github.com/ethereum/eth-go/ethminer"
"github.com/ethereum/eth-go/ethpub"
"github.com/ethereum/eth-go/ethrpc"
"github.com/ethereum/eth-go/ethutil"
"io"
"log"
"os"
"os/signal"
"path"
"strings"
"time"
)
var logger = ethlog.NewLogger("CLI")
var interruptCallbacks = []func(os.Signal){}
// Register interrupt handlers callbacks
func RegisterInterrupt(cb func(os.Signal)) {
interruptCallbacks = append(interruptCallbacks, cb)
}
// go routine that call interrupt handlers in order of registering
func HandleInterrupt() {
c := make(chan os.Signal, 1)
go func() {
signal.Notify(c, os.Interrupt)
for sig := range c {
logger.Errorf("Shutting down (%v) ... \n", sig)
RunInterruptCallbacks(sig)
}
}()
}
func RunInterruptCallbacks(sig os.Signal) {
for _, cb := range interruptCallbacks {
cb(sig)
}
}
func AbsolutePath(Datadir string, filename string) string {
if path.IsAbs(filename) {
return filename
}
return path.Join(Datadir, filename)
}
func openLogFile(Datadir string, filename string) *os.File {
path := AbsolutePath(Datadir, filename)
file, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
if err != nil {
panic(fmt.Sprintf("error opening log file '%s': %v", filename, err))
}
return file
}
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 InitDataDir(Datadir string) {
_, err := os.Stat(Datadir)
if err != nil {
if os.IsNotExist(err) {
fmt.Printf("Debug logging directory '%s' doesn't exist, creating it\n", Datadir)
os.Mkdir(Datadir, 0777)
}
}
}
func InitLogging(Datadir string, LogFile string, LogLevel int, DebugFile string) {
var writer io.Writer
if LogFile == "" {
writer = os.Stdout
} else {
writer = openLogFile(Datadir, LogFile)
}
ethlog.AddLogSystem(ethlog.NewStdLogSystem(writer, log.LstdFlags, ethlog.LogLevel(LogLevel)))
if DebugFile != "" {
writer = openLogFile(Datadir, DebugFile)
ethlog.AddLogSystem(ethlog.NewStdLogSystem(writer, log.LstdFlags, ethlog.DebugLevel))
}
}
func InitConfig(ConfigFile string, Datadir string, Identifier string, EnvPrefix string) {
InitDataDir(Datadir)
ethutil.ReadConfig(ConfigFile, Datadir, Identifier, EnvPrefix)
ethutil.Config.Set("rpcport", "700")
}
func exit(status int) {
ethlog.Flush()
os.Exit(status)
}
func NewEthereum(UseUPnP bool, OutboundPort string, MaxPeer int) *eth.Ethereum {
ethereum, err := eth.New(eth.CapDefault, UseUPnP)
if err != nil {
logger.Fatalln("eth start err:", err)
}
ethereum.Port = OutboundPort
ethereum.MaxPeers = MaxPeer
return ethereum
}
func StartEthereum(ethereum *eth.Ethereum, UseSeed bool) {
logger.Infof("Starting Ethereum v%s", ethutil.Config.Ver)
ethereum.Start(UseSeed)
RegisterInterrupt(func(sig os.Signal) {
ethereum.Stop()
ethlog.Flush()
})
}
func ShowGenesis(ethereum *eth.Ethereum) {
logger.Infoln(ethereum.BlockChain().Genesis())
exit(0)
}
func KeyTasks(GenAddr bool, ImportKey string, ExportKey bool, NonInteractive bool) {
switch {
case GenAddr:
if NonInteractive || confirm("This action overwrites your old private key.") {
CreateKeyPair(true)
}
exit(0)
case len(ImportKey) > 0:
if NonInteractive || confirm("This action overwrites your old private key.") {
// import should be from file
mnemonic := strings.Split(ImportKey, " ")
if len(mnemonic) == 24 {
logger.Infoln("Got mnemonic key, importing.")
key := ethutil.MnemonicDecode(mnemonic)
ImportPrivateKey(key)
} else if len(mnemonic) == 1 {
logger.Infoln("Got hex key, importing.")
ImportPrivateKey(ImportKey)
} else {
logger.Errorln("Did not recognise format, exiting.")
}
}
exit(0)
case ExportKey: // this should be exporting to a filename
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)
exit(0)
default:
// Creates a keypair if none exists
CreateKeyPair(false)
}
}
func StartRpc(ethereum *eth.Ethereum, RpcPort int) {
var err error
ethereum.RpcServer, err = ethrpc.NewJsonRpcServer(ethpub.NewPEthereum(ethereum), RpcPort)
if err != nil {
logger.Errorf("Could not start RPC interface (port %v): %v", RpcPort, err)
} else {
go ethereum.RpcServer.Start()
}
}
var miner ethminer.Miner
func StartMining(ethereum *eth.Ethereum) bool {
if !ethereum.Mining {
ethereum.Mining = true
if ethutil.GetKeyRing().Len() == 0 {
logger.Errorln("No address found, can't start mining")
ethereum.Mining = false
return true //????
}
keyPair := ethutil.GetKeyRing().Get(0)
addr := keyPair.Address()
go func() {
miner = ethminer.NewDefaultMiner(addr, ethereum)
// Give it some time to connect with peers
time.Sleep(3 * time.Second)
logger.Infoln("Miner started")
miner := ethminer.NewDefaultMiner(addr, ethereum)
miner.Start()
}()
RegisterInterrupt(func(os.Signal) {
StopMining(ethereum)
})
return true
}
return false
}
func StopMining(ethereum *eth.Ethereum) bool {
if ethereum.Mining {
miner.Stop()
logger.Infoln("Miner stopped")
ethereum.Mining = false
return true
}
return false
}
// Replay block
func BlockDo(ethereum *eth.Ethereum, hash []byte) error {
block := ethereum.BlockChain().GetBlock(hash)
if block == nil {
return fmt.Errorf("unknown block %x", hash)
}
parent := ethereum.BlockChain().GetBlock(block.PrevHash)
_, err := ethereum.StateManager().ApplyDiff(parent.State(), parent, block)
if err != nil {
return err
}
return nil
}
