path: root/cmd/utils/flags.go

package utils

import (
    "crypto/ecdsa"
    "fmt"
    "net"
    "net/http"
    "os"
    "path"
    "runtime"

    "github.com/codegangsta/cli"
    "github.com/ethereum/go-ethereum/accounts"
    "github.com/ethereum/go-ethereum/core"
    "github.com/ethereum/go-ethereum/crypto"
    "github.com/ethereum/go-ethereum/eth"
    "github.com/ethereum/go-ethereum/ethdb"
    "github.com/ethereum/go-ethereum/ethutil"
    "github.com/ethereum/go-ethereum/event"
    "github.com/ethereum/go-ethereum/logger"
    "github.com/ethereum/go-ethereum/p2p"
    "github.com/ethereum/go-ethereum/p2p/nat"
    "github.com/ethereum/go-ethereum/rpc"
    "github.com/ethereum/go-ethereum/xeth"
)

func init() {
    cli.AppHelpTemplate = `{{.Name}} {{if .Flags}}[global options] {{end}}command{{if .Flags}} [command options]{{end}} [arguments...]

VERSION:
   {{.Version}}

COMMANDS:
   {{range .Commands}}{{.Name}}{{with .ShortName}}, {{.}}{{end}}{{ "\t" }}{{.Usage}}
   {{end}}{{if .Flags}}
GLOBAL OPTIONS:
   {{range .Flags}}{{.}}
   {{end}}{{end}}
`

    cli.CommandHelpTemplate = `{{.Name}}{{if .Subcommands}} command{{end}}{{if .Flags}} [command options]{{end}} [arguments...]
{{if .Description}}{{.Description}}
{{end}}{{if .Subcommands}}
SUBCOMMANDS:
    {{range .Subcommands}}{{.Name}}{{with .ShortName}}, {{.}}{{end}}{{ "\t" }}{{.Usage}}
    {{end}}{{end}}{{if .Flags}}
OPTIONS:
    {{range .Flags}}{{.}}
    {{end}}{{end}}
`
}

// NewApp creates an app with sane defaults.
func NewApp(version, usage string) *cli.App {
    app := cli.NewApp()
    app.Name = path.Base(os.Args[0])
    app.Author = ""
    app.Authors = nil
    app.Email = ""
    app.Version = version
    app.Usage = usage
    return app
}

// These are all the command line flags we support.
// If you add to this list, please remember to include the
// flag in the appropriate command definition.
//
// The flags are defined here so their names and help texts
// are the same for all commands.

var (
    // General settings
    /*
        VMTypeFlag = cli.IntFlag{
            Name:  "vm",
            Usage: "Virtual Machine type: 0 is standard VM, 1 is debug VM",
        }
    */
    UnlockedAccountFlag = cli.StringFlag{
        Name:  "unlock",
        Usage: "Unlock a given account untill this programs exits (address:password)",
    }
    VMDebugFlag = cli.BoolFlag{
        Name:  "vmdebug",
        Usage: "Virtual Machine debug output",
    }
    DataDirFlag = cli.StringFlag{
        Name:  "datadir",
        Usage: "Data directory to be used",
        Value: ethutil.DefaultDataDir(),
    }
    MinerThreadsFlag = cli.IntFlag{
        Name:  "minerthreads",
        Usage: "Number of miner threads",
        Value: runtime.NumCPU(),
    }
    MiningEnabledFlag = cli.BoolFlag{
        Name:  "mine",
        Usage: "Enable mining",
    }

    LogFileFlag = cli.StringFlag{
        Name:  "logfile",
        Usage: "Send log output to a file",
    }
    LogLevelFlag = cli.IntFlag{
        Name:  "loglevel",
        Usage: "0-5 (silent, error, warn, info, debug, debug detail)",
        Value: int(logger.InfoLevel),
    }
    LogFormatFlag = cli.StringFlag{
        Name:  "logformat",
        Usage: `"std" or "raw"`,
        Value: "std",
    }

    // RPC settings
    RPCEnabledFlag = cli.BoolFlag{
        Name:  "rpc",
        Usage: "Whether RPC server is enabled",
    }
    RPCListenAddrFlag = cli.StringFlag{
        Name:  "rpcaddr",
        Usage: "Listening address for the JSON-RPC server",
        Value: "127.0.0.1",
    }
    RPCPortFlag = cli.IntFlag{
        Name:  "rpcport",
        Usage: "Port on which the JSON-RPC server should listen",
        Value: 8545,
    }

    // Network Settings
    MaxPeersFlag = cli.IntFlag{
        Name:  "maxpeers",
        Usage: "Maximum number of network peers",
        Value: 16,
    }
    ListenPortFlag = cli.IntFlag{
        Name:  "port",
        Usage: "Network listening port",
        Value: 30303,
    }
    BootnodesFlag = cli.StringFlag{
        Name:  "bootnodes",
        Usage: "Space-separated enode URLs for discovery bootstrap",
        Value: "",
    }
    NodeKeyFileFlag = cli.StringFlag{
        Name:  "nodekey",
        Usage: "P2P node key file",
    }
    NodeKeyHexFlag = cli.StringFlag{
        Name:  "nodekeyhex",
        Usage: "P2P node key as hex (for testing)",
    }
    NATFlag = cli.StringFlag{
        Name:  "nat",
        Usage: "Port mapping mechanism (any|none|upnp|pmp|extip:<IP>)",
        Value: "any",
    }
)

func GetNAT(ctx *cli.Context) nat.Interface {
    natif, err := nat.Parse(ctx.GlobalString(NATFlag.Name))
    if err != nil {
        Fatalf("Option %s: %v", NATFlag.Name, err)
    }
    return natif
}

func GetNodeKey(ctx *cli.Context) (key *ecdsa.PrivateKey) {
    hex, file := ctx.GlobalString(NodeKeyHexFlag.Name), ctx.GlobalString(NodeKeyFileFlag.Name)
    var err error
    switch {
    case file != "" && hex != "":
        Fatalf("Options %q and %q are mutually exclusive", NodeKeyFileFlag.Name, NodeKeyHexFlag.Name)
    case file != "":
        if key, err = crypto.LoadECDSA(file); err != nil {
            Fatalf("Option %q: %v", NodeKeyFileFlag.Name, err)
        }
    case hex != "":
        if key, err = crypto.HexToECDSA(hex); err != nil {
            Fatalf("Option %q: %v", NodeKeyHexFlag.Name, err)
        }
    }
    return key
}

func GetEthereum(clientID, version string, ctx *cli.Context) (*eth.Ethereum, error) {
    return eth.New(&eth.Config{
        Name:           p2p.MakeName(clientID, version),
        DataDir:        ctx.GlobalString(DataDirFlag.Name),
        LogFile:        ctx.GlobalString(LogFileFlag.Name),
        LogLevel:       ctx.GlobalInt(LogLevelFlag.Name),
        LogFormat:      ctx.GlobalString(LogFormatFlag.Name),
        MinerThreads:   ctx.GlobalInt(MinerThreadsFlag.Name),
        AccountManager: GetAccountManager(ctx),
        VmDebug:        ctx.GlobalBool(VMDebugFlag.Name),
        MaxPeers:       ctx.GlobalInt(MaxPeersFlag.Name),
        Port:           ctx.GlobalString(ListenPortFlag.Name),
        NAT:            GetNAT(ctx),
        NodeKey:        GetNodeKey(ctx),
        Shh:            true,
        Dial:           true,
        BootNodes:      ctx.GlobalString(BootnodesFlag.Name),
    })
}

func GetChain(ctx *cli.Context) (*core.ChainManager, ethutil.Database, ethutil.Database) {
    dataDir := ctx.GlobalString(DataDirFlag.Name)
    blockDb, err := ethdb.NewLDBDatabase(path.Join(dataDir, "blockchain"))
    if err != nil {
        Fatalf("Could not open database: %v", err)
    }

    stateDb, err := ethdb.NewLDBDatabase(path.Join(dataDir, "state"))
    if err != nil {
        Fatalf("Could not open database: %v", err)
    }
    return core.NewChainManager(blockDb, stateDb, new(event.TypeMux)), blockDb, stateDb
}

// Global account manager
var km *accounts.Manager

func GetAccountManager(ctx *cli.Context) *accounts.Manager {
    dataDir := ctx.GlobalString(DataDirFlag.Name)
    if km == nil {
        ks := crypto.NewKeyStorePassphrase(path.Join(dataDir, "keys"))
        km = accounts.NewManager(ks)
    }
    return km
}

func StartRPC(eth *eth.Ethereum, ctx *cli.Context) {
    addr := ctx.GlobalString(RPCListenAddrFlag.Name)
    port := ctx.GlobalInt(RPCPortFlag.Name)
    dataDir := ctx.GlobalString(DataDirFlag.Name)

    l, err := net.Listen("tcp", fmt.Sprintf("%s:%d", addr, port))
    if err != nil {
        Fatalf("Can't listen on %s:%d: %v", addr, port, err)
    }
    go http.Serve(l, rpc.JSONRPC(xeth.New(eth, nil), dataDir))
}