path: root/cmd/geth/main.go

// Copyright 2014 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.

// geth is the official command-line client for Ethereum.
package main

import (
    "fmt"
    "io/ioutil"
    "os"
    "path/filepath"
    "runtime"
    "strconv"
    "strings"
    "time"

    "github.com/codegangsta/cli"
    "github.com/ethereum/ethash"
    "github.com/ethereum/go-ethereum/cmd/utils"
    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/core"
    "github.com/ethereum/go-ethereum/eth"
    "github.com/ethereum/go-ethereum/ethdb"
    "github.com/ethereum/go-ethereum/internal/debug"
    "github.com/ethereum/go-ethereum/logger"
    "github.com/ethereum/go-ethereum/logger/glog"
    "github.com/ethereum/go-ethereum/metrics"
    "github.com/ethereum/go-ethereum/node"
    "github.com/ethereum/go-ethereum/params"
    "github.com/ethereum/go-ethereum/rlp"
)

const (
    ClientIdentifier = "Geth"
    Version          = "1.5.0-unstable"
    VersionMajor     = 1
    VersionMinor     = 5
    VersionPatch     = 0
)

var (
    gitCommit       string // set via linker flagg
    nodeNameVersion string
    app             *cli.App
)

func init() {
    if gitCommit == "" {
        nodeNameVersion = Version
    } else {
        nodeNameVersion = Version + "-" + gitCommit[:8]
    }

    app = utils.NewApp(Version, "the go-ethereum command line interface")
    app.Action = geth
    app.HideVersion = true // we have a command to print the version
    app.Commands = []cli.Command{
        importCommand,
        exportCommand,
        upgradedbCommand,
        removedbCommand,
        dumpCommand,
        monitorCommand,
        accountCommand,
        walletCommand,
        {
            Action: makedag,
            Name:   "makedag",
            Usage:  "generate ethash dag (for testing)",
            Description: `
The makedag command generates an ethash DAG in /tmp/dag.

This command exists to support the system testing project.
Regular users do not need to execute it.
`,
        },
        {
            Action: gpuinfo,
            Name:   "gpuinfo",
            Usage:  "gpuinfo",
            Description: `
Prints OpenCL device info for all found GPUs.
`,
        },
        {
            Action: gpubench,
            Name:   "gpubench",
            Usage:  "benchmark GPU",
            Description: `
Runs quick benchmark on first GPU found.
`,
        },
        {
            Action: version,
            Name:   "version",
            Usage:  "print ethereum version numbers",
            Description: `
The output of this command is supposed to be machine-readable.
`,
        },
        {
            Action: initGenesis,
            Name:   "init",
            Usage:  "bootstraps and initialises a new genesis block (JSON)",
            Description: `
The init command initialises a new genesis block and definition for the network.
This is a destructive action and changes the network in which you will be
participating.
`,
        },
        {
            Action: console,
            Name:   "console",
            Usage:  `Geth Console: interactive JavaScript environment`,
            Description: `
The Geth console is an interactive shell for the JavaScript runtime environment
which exposes a node admin interface as well as the Ðapp JavaScript API.
See https://github.com/ethereum/go-ethereum/wiki/Javascipt-Console
`,
        },
        {
            Action: attach,
            Name:   "attach",
            Usage:  `Geth Console: interactive JavaScript environment (connect to node)`,
            Description: `
        The Geth console is an interactive shell for the JavaScript runtime environment
        which exposes a node admin interface as well as the Ðapp JavaScript API.
        See https://github.com/ethereum/go-ethereum/wiki/Javascipt-Console.
        This command allows to open a console on a running geth node.
        `,
        },
        {
            Action: execScripts,
            Name:   "js",
            Usage:  `executes the given JavaScript files in the Geth JavaScript VM`,
            Description: `
The JavaScript VM exposes a node admin interface as well as the Ðapp
JavaScript API. See https://github.com/ethereum/go-ethereum/wiki/Javascipt-Console
`,
        },
    }

    app.Flags = []cli.Flag{
        utils.IdentityFlag,
        utils.UnlockedAccountFlag,
        utils.PasswordFileFlag,
        utils.GenesisFileFlag,
        utils.BootnodesFlag,
        utils.DataDirFlag,
        utils.KeyStoreDirFlag,
        utils.BlockchainVersionFlag,
        utils.OlympicFlag,
        utils.FastSyncFlag,
        utils.CacheFlag,
        utils.LightKDFFlag,
        utils.JSpathFlag,
        utils.ListenPortFlag,
        utils.MaxPeersFlag,
        utils.MaxPendingPeersFlag,
        utils.EtherbaseFlag,
        utils.GasPriceFlag,
        utils.MinerThreadsFlag,
        utils.MiningEnabledFlag,
        utils.MiningGPUFlag,
        utils.AutoDAGFlag,
        utils.TargetGasLimitFlag,
        utils.NATFlag,
        utils.NatspecEnabledFlag,
        utils.NoDiscoverFlag,
        utils.NodeKeyFileFlag,
        utils.NodeKeyHexFlag,
        utils.RPCEnabledFlag,
        utils.RPCListenAddrFlag,
        utils.RPCPortFlag,
        utils.RPCApiFlag,
        utils.WSEnabledFlag,
        utils.WSListenAddrFlag,
        utils.WSPortFlag,
        utils.WSApiFlag,
        utils.WSAllowedOriginsFlag,
        utils.IPCDisabledFlag,
        utils.IPCApiFlag,
        utils.IPCPathFlag,
        utils.ExecFlag,
        utils.PreLoadJSFlag,
        utils.WhisperEnabledFlag,
        utils.DevModeFlag,
        utils.TestNetFlag,
        utils.VMForceJitFlag,
        utils.VMJitCacheFlag,
        utils.VMEnableJitFlag,
        utils.NetworkIdFlag,
        utils.RPCCORSDomainFlag,
        utils.MetricsEnabledFlag,
        utils.SolcPathFlag,
        utils.GpoMinGasPriceFlag,
        utils.GpoMaxGasPriceFlag,
        utils.GpoFullBlockRatioFlag,
        utils.GpobaseStepDownFlag,
        utils.GpobaseStepUpFlag,
        utils.GpobaseCorrectionFactorFlag,
        utils.ExtraDataFlag,
    }
    app.Flags = append(app.Flags, debug.Flags...)

    app.Before = func(ctx *cli.Context) error {
        runtime.GOMAXPROCS(runtime.NumCPU())
        if err := debug.Setup(ctx); err != nil {
            return err
        }
        // Start system runtime metrics collection
        go metrics.CollectProcessMetrics(3 * time.Second)

        utils.SetupNetwork(ctx)

        // Deprecation warning.
        if ctx.GlobalIsSet(utils.GenesisFileFlag.Name) {
            common.PrintDepricationWarning("--genesis is deprecated. Switch to use 'geth init /path/to/file'")
        }

        return nil
    }

    app.After = func(ctx *cli.Context) error {
        logger.Flush()
        debug.Exit()
        utils.Stdin.Close() // Resets terminal mode.
        return nil
    }
}

func main() {
    if err := app.Run(os.Args); err != nil {
        fmt.Fprintln(os.Stderr, err)
        os.Exit(1)
    }
}

func makeDefaultExtra() []byte {
    var clientInfo = struct {
        Version   uint
        Name      string
        GoVersion string
        Os        string
    }{uint(VersionMajor<<16 | VersionMinor<<8 | VersionPatch), ClientIdentifier, runtime.Version(), runtime.GOOS}
    extra, err := rlp.EncodeToBytes(clientInfo)
    if err != nil {
        glog.V(logger.Warn).Infoln("error setting canonical miner information:", err)
    }

    if uint64(len(extra)) > params.MaximumExtraDataSize.Uint64() {
        glog.V(logger.Warn).Infoln("error setting canonical miner information: extra exceeds", params.MaximumExtraDataSize)
        glog.V(logger.Debug).Infof("extra: %x\n", extra)
        return nil
    }
    return extra
}

// geth is the main entry point into the system if no special subcommand is ran.
// It creates a default node based on the command line arguments and runs it in
// blocking mode, waiting for it to be shut down.
func geth(ctx *cli.Context) {
    node := utils.MakeSystemNode(ClientIdentifier, nodeNameVersion, makeDefaultExtra(), ctx)
    startNode(ctx, node)
    node.Wait()
}

// attach will connect to a running geth instance attaching a JavaScript console and to it.
func attach(ctx *cli.Context) {
    // attach to a running geth instance
    client, err := utils.NewRemoteRPCClient(ctx)
    if err != nil {
        utils.Fatalf("Unable to attach to geth: %v", err)
    }

    repl := newLightweightJSRE(
        ctx.GlobalString(utils.JSpathFlag.Name),
        client,
        ctx.GlobalString(utils.DataDirFlag.Name),
        true,
    )

    // preload user defined JS files into the console
    err = repl.preloadJSFiles(ctx)
    if err != nil {
        utils.Fatalf("unable to preload JS file %v", err)
    }

    // in case the exec flag holds a JS statement execute it and return
    if ctx.GlobalString(utils.ExecFlag.Name) != "" {
        repl.batch(ctx.GlobalString(utils.ExecFlag.Name))
    } else {
        repl.welcome()
        repl.interactive()
    }
}

// initGenesis will initialise the given JSON format genesis file and writes it as
// the zero'd block (i.e. genesis) or will fail hard if it can't succeed.
func initGenesis(ctx *cli.Context) {
    genesisPath := ctx.Args().First()
    if len(genesisPath) == 0 {
        utils.Fatalf("must supply path to genesis JSON file")
    }

    chainDb, err := ethdb.NewLDBDatabase(filepath.Join(utils.MustMakeDataDir(ctx), "chaindata"), 0, 0)
    if err != nil {
        utils.Fatalf("could not open database: %v", err)
    }

    genesisFile, err := os.Open(genesisPath)
    if err != nil {
        utils.Fatalf("failed to read genesis file: %v", err)
    }

    block, err := core.WriteGenesisBlock(chainDb, genesisFile)
    if err != nil {
        utils.Fatalf("failed to write genesis block: %v", err)
    }
    glog.V(logger.Info).Infof("successfully wrote genesis block and/or chain rule set: %x", block.Hash())
}

// console starts a new geth node, attaching a JavaScript console to it at the
// same time.
func console(ctx *cli.Context) {
    // Create and start the node based on the CLI flags
    node := utils.MakeSystemNode(ClientIdentifier, nodeNameVersion, makeDefaultExtra(), ctx)
    startNode(ctx, node)

    // Attach to the newly started node, and either execute script or become interactive
    client, err := node.Attach()
    if err != nil {
        utils.Fatalf("Failed to attach to the inproc geth: %v", err)
    }
    repl := newJSRE(node,
        ctx.GlobalString(utils.JSpathFlag.Name),
        ctx.GlobalString(utils.RPCCORSDomainFlag.Name),
        client, true)

    // preload user defined JS files into the console
    err = repl.preloadJSFiles(ctx)
    if err != nil {
        utils.Fatalf("unable to preload JS file %v", err)
    }

    // in case the exec flag holds a JS statement execute it and return
    if script := ctx.GlobalString(utils.ExecFlag.Name); script != "" {
        repl.batch(script)
    } else {
        repl.welcome()
        repl.interactive()
    }
    node.Stop()
}

// execScripts starts a new geth node based on the CLI flags, and executes each
// of the JavaScript files specified as command arguments.
func execScripts(ctx *cli.Context) {
    // Create and start the node based on the CLI flags
    node := utils.MakeSystemNode(ClientIdentifier, nodeNameVersion, makeDefaultExtra(), ctx)
    startNode(ctx, node)

    // Attach to the newly started node and execute the given scripts
    client, err := node.Attach()
    if err != nil {
        utils.Fatalf("Failed to attach to the inproc geth: %v", err)
    }
    repl := newJSRE(node,
        ctx.GlobalString(utils.JSpathFlag.Name),
        ctx.GlobalString(utils.RPCCORSDomainFlag.Name),
        client, false)

    for _, file := range ctx.Args() {
        repl.exec(file)
    }
    node.Stop()
}

// startNode boots up the system node and all registered protocols, after which
// it unlocks any requested accounts, and starts the RPC/IPC interfaces and the
// miner.
func startNode(ctx *cli.Context, stack *node.Node) {
    // Start up the node itself
    utils.StartNode(stack)

    // Unlock any account specifically requested
    var ethereum *eth.Ethereum
    if err := stack.Service(&ethereum); err != nil {
        utils.Fatalf("ethereum service not running: %v", err)
    }
    accman := ethereum.AccountManager()
    passwords := utils.MakePasswordList(ctx)

    accounts := strings.Split(ctx.GlobalString(utils.UnlockedAccountFlag.Name), ",")
    for i, account := range accounts {
        if trimmed := strings.TrimSpace(account); trimmed != "" {
            unlockAccount(ctx, accman, trimmed, i, passwords)
        }
    }
    // Start auxiliary services if enabled
    if ctx.GlobalBool(utils.MiningEnabledFlag.Name) {
        if err := ethereum.StartMining(ctx.GlobalInt(utils.MinerThreadsFlag.Name), ctx.GlobalString(utils.MiningGPUFlag.Name)); err != nil {
            utils.Fatalf("Failed to start mining: %v", err)
        }
    }
}

func makedag(ctx *cli.Context) {
    args := ctx.Args()
    wrongArgs := func() {
        utils.Fatalf(`Usage: geth makedag <block number> <outputdir>`)
    }
    switch {
    case len(args) == 2:
        blockNum, err := strconv.ParseUint(args[0], 0, 64)
        dir := args[1]
        if err != nil {
            wrongArgs()
        } else {
            dir = filepath.Clean(dir)
            // seems to require a trailing slash
            if !strings.HasSuffix(dir, "/") {
                dir = dir + "/"
            }
            _, err = ioutil.ReadDir(dir)
            if err != nil {
                utils.Fatalf("Can't find dir")
            }
            fmt.Println("making DAG, this could take awhile...")
            ethash.MakeDAG(blockNum, dir)
        }
    default:
        wrongArgs()
    }
}

func gpuinfo(ctx *cli.Context) {
    eth.PrintOpenCLDevices()
}

func gpubench(ctx *cli.Context) {
    args := ctx.Args()
    wrongArgs := func() {
        utils.Fatalf(`Usage: geth gpubench <gpu number>`)
    }
    switch {
    case len(args) == 1:
        n, err := strconv.ParseUint(args[0], 0, 64)
        if err != nil {
            wrongArgs()
        }
        eth.GPUBench(n)
    case len(args) == 0:
        eth.GPUBench(0)
    default:
        wrongArgs()
    }
}

func version(c *cli.Context) {
    fmt.Println(ClientIdentifier)
    fmt.Println("Version:", Version)
    if gitCommit != "" {
        fmt.Println("Git Commit:", gitCommit)
    }
    fmt.Println("Protocol Versions:", eth.ProtocolVersions)
    fmt.Println("Network Id:", c.GlobalInt(utils.NetworkIdFlag.Name))
    fmt.Println("Go Version:", runtime.Version())
    fmt.Println("OS:", runtime.GOOS)
    fmt.Printf("GOPATH=%s\n", os.Getenv("GOPATH"))
    fmt.Printf("GOROOT=%s\n", runtime.GOROOT())
}