package utils
import (
"fmt"
"github.com/ethereum/eth-go"
"github.com/ethereum/eth-go/ethcrypto"
"github.com/ethereum/eth-go/ethdb"
"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"
"github.com/ethereum/eth-go/ethwire"
"io"
"log"
"os"
"os/signal"
"path"
"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("Data 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, EnvPrefix string) *ethutil.ConfigManager {
InitDataDir(Datadir)
return ethutil.ReadConfig(ConfigFile, Datadir, EnvPrefix)
}
func exit(err error) {
status := 0
if err != nil {
fmt.Println(err)
logger.Errorln("Fatal: ", err)
status = 1
}
ethlog.Flush()
os.Exit(status)
}
func NewDatabase() ethutil.Database {
db, err := ethdb.NewLDBDatabase("database")
if err != nil {
exit(err)
}
return db
}
func NewClientIdentity(clientIdentifier, version, customIdentifier string) *ethwire.SimpleClientIdentity {
return ethwire.NewSimpleClientIdentity(clientIdentifier, version, customIdentifier)
}
func NewEthereum(db ethutil.Database, clientIdentity ethwire.ClientIdentity, keyManager *ethcrypto.KeyManager, usePnp bool, OutboundPort string, MaxPeer int) *eth.Ethereum {
ethereum, err := eth.New(db, clientIdentity, keyManager, eth.CapDefault, usePnp)
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 %s", ethereum.ClientIdentity())
ethereum.Start(UseSeed)
RegisterInterrupt(func(sig os.Signal) {
ethereum.Stop()
ethlog.Flush()
})
}
func ShowGenesis(ethereum *eth.Ethereum) {
logger.Infoln(ethereum.BlockChain().Genesis())
exit(nil)
}
func NewKeyManager(KeyStore string, Datadir string, db ethutil.Database) *ethcrypto.KeyManager {
var keyManager *ethcrypto.KeyManager
switch {
case KeyStore == "db":
keyManager = ethcrypto.NewDBKeyManager(db)
case KeyStore == "file":
keyManager = ethcrypto.NewFileKeyManager(Datadir)
default:
exit(fmt.Errorf("unknown keystore type: %s", KeyStore))
}
return keyManager
}
func KeyTasks(keyManager *ethcrypto.KeyManager, KeyRing string, GenAddr bool, SecretFile string, ExportDir string, NonInteractive bool) {
var err error
switch {
case GenAddr:
if NonInteractive || confirm("This action overwrites your old private key.") {
err = keyManager.Init(KeyRing, 0, true)
}
exit(err)
case len(SecretFile) > 0:
SecretFile = ethutil.ExpandHomePath(SecretFile)
if NonInteractive || confirm("This action overwrites your old private key.") {
err = keyManager.InitFromSecretsFile(KeyRing, 0, SecretFile)
}
exit(err)
case len(ExportDir) > 0:
err = keyManager.Init(KeyRing, 0, false)
if err == nil {
err = keyManager.Export(ExportDir)
}
exit(err)
default:
// Creates a keypair if none exists
err = keyManager.Init(KeyRing, 0, false)
if err != nil {
exit(err)
}
}
}
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
addr := ethereum.KeyManager().Address()
go func() {
miner = ethminer.NewDefaultMiner(addr, ethereum)
// Give it some time to connect with peers
time.Sleep(3 * time.Second)
for !ethereum.IsUpToDate() {
time.Sleep(5 * 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
}
