path: root/cmd/swarm/main.go

// Copyright 2016 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/>.

package main

import (
    "context"
    "crypto/ecdsa"
    "fmt"
    "io/ioutil"
    "math/big"
    "os"
    "os/signal"
    "runtime"
    "strconv"
    "strings"
    "syscall"
    "time"

    "github.com/ethereum/go-ethereum/accounts"
    "github.com/ethereum/go-ethereum/accounts/keystore"
    "github.com/ethereum/go-ethereum/cmd/utils"
    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/console"
    "github.com/ethereum/go-ethereum/contracts/ens"
    "github.com/ethereum/go-ethereum/crypto"
    "github.com/ethereum/go-ethereum/ethclient"
    "github.com/ethereum/go-ethereum/internal/debug"
    "github.com/ethereum/go-ethereum/log"
    "github.com/ethereum/go-ethereum/node"
    "github.com/ethereum/go-ethereum/p2p"
    "github.com/ethereum/go-ethereum/p2p/discover"
    "github.com/ethereum/go-ethereum/params"
    "github.com/ethereum/go-ethereum/rpc"
    "github.com/ethereum/go-ethereum/swarm"
    bzzapi "github.com/ethereum/go-ethereum/swarm/api"
    "gopkg.in/urfave/cli.v1"
)

const clientIdentifier = "swarm"

var (
    gitCommit        string // Git SHA1 commit hash of the release (set via linker flags)
    testbetBootNodes = []string{
        "enode://ec8ae764f7cb0417bdfb009b9d0f18ab3818a3a4e8e7c67dd5f18971a93510a2e6f43cd0b69a27e439a9629457ea804104f37c85e41eed057d3faabbf7744cdf@13.74.157.139:30429",
        "enode://c2e1fceb3bf3be19dff71eec6cccf19f2dbf7567ee017d130240c670be8594bc9163353ca55dd8df7a4f161dd94b36d0615c17418b5a3cdcbb4e9d99dfa4de37@13.74.157.139:30430",
        "enode://fe29b82319b734ce1ec68b84657d57145fee237387e63273989d354486731e59f78858e452ef800a020559da22dcca759536e6aa5517c53930d29ce0b1029286@13.74.157.139:30431",
        "enode://1d7187e7bde45cf0bee489ce9852dd6d1a0d9aa67a33a6b8e6db8a4fbc6fcfa6f0f1a5419343671521b863b187d1c73bad3603bae66421d157ffef357669ddb8@13.74.157.139:30432",
        "enode://0e4cba800f7b1ee73673afa6a4acead4018f0149d2e3216be3f133318fd165b324cd71b81fbe1e80deac8dbf56e57a49db7be67f8b9bc81bd2b7ee496434fb5d@13.74.157.139:30433",
    }
)

var (
    ChequebookAddrFlag = cli.StringFlag{
        Name:  "chequebook",
        Usage: "chequebook contract address",
    }
    SwarmAccountFlag = cli.StringFlag{
        Name:  "bzzaccount",
        Usage: "Swarm account key file",
    }
    SwarmListenAddrFlag = cli.StringFlag{
        Name:  "httpaddr",
        Usage: "Swarm HTTP API listening interface",
    }
    SwarmPortFlag = cli.StringFlag{
        Name:  "bzzport",
        Usage: "Swarm local http api port",
    }
    SwarmNetworkIdFlag = cli.IntFlag{
        Name:  "bzznetworkid",
        Usage: "Network identifier (integer, default 3=swarm testnet)",
    }
    SwarmConfigPathFlag = cli.StringFlag{
        Name:  "bzzconfig",
        Usage: "Swarm config file path (datadir/bzz)",
    }
    SwarmSwapEnabledFlag = cli.BoolFlag{
        Name:  "swap",
        Usage: "Swarm SWAP enabled (default false)",
    }
    SwarmSwapAPIFlag = cli.StringFlag{
        Name:  "swap-api",
        Usage: "URL of the Ethereum API provider to use to settle SWAP payments",
    }
    SwarmSyncEnabledFlag = cli.BoolTFlag{
        Name:  "sync",
        Usage: "Swarm Syncing enabled (default true)",
    }
    EnsAPIFlag = cli.StringFlag{
        Name:  "ens-api",
        Usage: "URL of the Ethereum API provider to use for ENS record lookups",
        Value: node.DefaultIPCEndpoint("geth"),
    }
    EnsAddrFlag = cli.StringFlag{
        Name:  "ens-addr",
        Usage: "ENS contract address (default is detected as testnet or mainnet using --ens-api)",
    }
    SwarmApiFlag = cli.StringFlag{
        Name:  "bzzapi",
        Usage: "Swarm HTTP endpoint",
        Value: "http://127.0.0.1:8500",
    }
    SwarmRecursiveUploadFlag = cli.BoolFlag{
        Name:  "recursive",
        Usage: "Upload directories recursively",
    }
    SwarmWantManifestFlag = cli.BoolTFlag{
        Name:  "manifest",
        Usage: "Automatic manifest upload",
    }
    SwarmUploadDefaultPath = cli.StringFlag{
        Name:  "defaultpath",
        Usage: "path to file served for empty url path (none)",
    }
    SwarmUpFromStdinFlag = cli.BoolFlag{
        Name:  "stdin",
        Usage: "reads data to be uploaded from stdin",
    }
    SwarmUploadMimeType = cli.StringFlag{
        Name:  "mime",
        Usage: "force mime type",
    }
    CorsStringFlag = cli.StringFlag{
        Name:  "corsdomain",
        Usage: "Domain on which to send Access-Control-Allow-Origin header (multiple domains can be supplied separated by a ',')",
    }

    // the following flags are deprecated and should be removed in the future
    DeprecatedEthAPIFlag = cli.StringFlag{
        Name:  "ethapi",
        Usage: "DEPRECATED: please use --ens-api and --swap-api",
    }
)

var defaultNodeConfig = node.DefaultConfig

// This init function sets defaults so cmd/swarm can run alongside geth.
func init() {
    defaultNodeConfig.Name = clientIdentifier
    defaultNodeConfig.Version = params.VersionWithCommit(gitCommit)
    defaultNodeConfig.P2P.ListenAddr = ":30399"
    defaultNodeConfig.IPCPath = "bzzd.ipc"
    // Set flag defaults for --help display.
    utils.ListenPortFlag.Value = 30399
}

var app = utils.NewApp(gitCommit, "Ethereum Swarm")

// This init function creates the cli.App.
func init() {
    app.Action = bzzd
    app.HideVersion = true // we have a command to print the version
    app.Copyright = "Copyright 2013-2016 The go-ethereum Authors"
    app.Commands = []cli.Command{
        {
            Action:    version,
            Name:      "version",
            Usage:     "Print version numbers",
            ArgsUsage: " ",
            Description: `
The output of this command is supposed to be machine-readable.
`,
        },
        {
            Action:    upload,
            Name:      "up",
            Usage:     "upload a file or directory to swarm using the HTTP API",
            ArgsUsage: " <file>",
            Description: `
"upload a file or directory to swarm using the HTTP API and prints the root hash",
`,
        },
        {
            Action:    list,
            Name:      "ls",
            Usage:     "list files and directories contained in a manifest",
            ArgsUsage: " <manifest> [<prefix>]",
            Description: `
Lists files and directories contained in a manifest.
`,
        },
        {
            Action:    hash,
            Name:      "hash",
            Usage:     "print the swarm hash of a file or directory",
            ArgsUsage: " <file>",
            Description: `
Prints the swarm hash of file or directory.
`,
        },
        {
            Name:      "manifest",
            Usage:     "update a MANIFEST",
            ArgsUsage: "manifest COMMAND",
            Description: `
Updates a MANIFEST by adding/removing/updating the hash of a path.
`,
            Subcommands: []cli.Command{
                {
                    Action:    add,
                    Name:      "add",
                    Usage:     "add a new path to the manifest",
                    ArgsUsage: "<MANIFEST> <path> <hash> [<content-type>]",
                    Description: `
Adds a new path to the manifest
`,
                },
                {
                    Action:    update,
                    Name:      "update",
                    Usage:     "update the hash for an already existing path in the manifest",
                    ArgsUsage: "<MANIFEST> <path> <newhash> [<newcontent-type>]",
                    Description: `
Update the hash for an already existing path in the manifest
`,
                },
                {
                    Action:    remove,
                    Name:      "remove",
                    Usage:     "removes a path from the manifest",
                    ArgsUsage: "<MANIFEST> <path>",
                    Description: `
Removes a path from the manifest
`,
                },
            },
        },
        {
            Action:    cleandb,
            Name:      "cleandb",
            Usage:     "Cleans database of corrupted entries",
            ArgsUsage: " ",
            Description: `
Cleans database of corrupted entries.
`,
        },
    }

    app.Flags = []cli.Flag{
        utils.IdentityFlag,
        utils.DataDirFlag,
        utils.BootnodesFlag,
        utils.KeyStoreDirFlag,
        utils.ListenPortFlag,
        utils.NoDiscoverFlag,
        utils.DiscoveryV5Flag,
        utils.NetrestrictFlag,
        utils.NodeKeyFileFlag,
        utils.NodeKeyHexFlag,
        utils.MaxPeersFlag,
        utils.NATFlag,
        utils.IPCDisabledFlag,
        utils.IPCPathFlag,
        utils.PasswordFileFlag,
        // bzzd-specific flags
        CorsStringFlag,
        EnsAPIFlag,
        EnsAddrFlag,
        SwarmConfigPathFlag,
        SwarmSwapEnabledFlag,
        SwarmSwapAPIFlag,
        SwarmSyncEnabledFlag,
        SwarmListenAddrFlag,
        SwarmPortFlag,
        SwarmAccountFlag,
        SwarmNetworkIdFlag,
        ChequebookAddrFlag,
        // upload flags
        SwarmApiFlag,
        SwarmRecursiveUploadFlag,
        SwarmWantManifestFlag,
        SwarmUploadDefaultPath,
        SwarmUpFromStdinFlag,
        SwarmUploadMimeType,
        //deprecated flags
        DeprecatedEthAPIFlag,
    }
    app.Flags = append(app.Flags, debug.Flags...)
    app.Before = func(ctx *cli.Context) error {
        runtime.GOMAXPROCS(runtime.NumCPU())
        return debug.Setup(ctx)
    }
    app.After = func(ctx *cli.Context) error {
        debug.Exit()
        return nil
    }
}

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

func version(ctx *cli.Context) error {
    fmt.Println(strings.Title(clientIdentifier))
    fmt.Println("Version:", params.Version)
    if gitCommit != "" {
        fmt.Println("Git Commit:", gitCommit)
    }
    fmt.Println("Network Id:", ctx.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())
    return nil
}

func bzzd(ctx *cli.Context) error {
    // exit if the deprecated --ethapi flag is set
    if ctx.GlobalString(DeprecatedEthAPIFlag.Name) != "" {
        utils.Fatalf("--ethapi is no longer a valid command line flag, please use --ens-api and/or --swap-api.")
    }

    cfg := defaultNodeConfig
    utils.SetNodeConfig(ctx, &cfg)
    stack, err := node.New(&cfg)
    if err != nil {
        utils.Fatalf("can't create node: %v", err)
    }

    registerBzzService(ctx, stack)
    utils.StartNode(stack)

    go func() {
        sigc := make(chan os.Signal, 1)
        signal.Notify(sigc, syscall.SIGTERM)
        defer signal.Stop(sigc)
        <-sigc
        log.Info("Got sigterm, shutting swarm down...")
        stack.Stop()
    }()

    networkId := ctx.GlobalUint64(SwarmNetworkIdFlag.Name)
    // Add bootnodes as initial peers.
    if ctx.GlobalIsSet(utils.BootnodesFlag.Name) {
        bootnodes := strings.Split(ctx.GlobalString(utils.BootnodesFlag.Name), ",")
        injectBootnodes(stack.Server(), bootnodes)
    } else {
        if networkId == 3 {
            injectBootnodes(stack.Server(), testbetBootNodes)
        }
    }

    stack.Wait()
    return nil
}

// detectEnsAddr determines the ENS contract address by getting both the
// version and genesis hash using the client and matching them to either
// mainnet or testnet addresses
func detectEnsAddr(client *rpc.Client) (common.Address, error) {
    ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
    defer cancel()

    var version string
    if err := client.CallContext(ctx, &version, "net_version"); err != nil {
        return common.Address{}, err
    }

    block, err := ethclient.NewClient(client).BlockByNumber(ctx, big.NewInt(0))
    if err != nil {
        return common.Address{}, err
    }

    switch {

    case version == "1" && block.Hash() == params.MainNetGenesisHash:
        log.Info("using Mainnet ENS contract address", "addr", ens.MainNetAddress)
        return ens.MainNetAddress, nil

    case version == "3" && block.Hash() == params.TestNetGenesisHash:
        log.Info("using Testnet ENS contract address", "addr", ens.TestNetAddress)
        return ens.TestNetAddress, nil

    default:
        return common.Address{}, fmt.Errorf("unknown version and genesis hash: %s %s", version, block.Hash())
    }
}

func registerBzzService(ctx *cli.Context, stack *node.Node) {
    prvkey := getAccount(ctx, stack)

    chbookaddr := common.HexToAddress(ctx.GlobalString(ChequebookAddrFlag.Name))
    bzzdir := ctx.GlobalString(SwarmConfigPathFlag.Name)
    if bzzdir == "" {
        bzzdir = stack.InstanceDir()
    }

    bzzconfig, err := bzzapi.NewConfig(bzzdir, chbookaddr, prvkey, ctx.GlobalUint64(SwarmNetworkIdFlag.Name))
    if err != nil {
        utils.Fatalf("unable to configure swarm: %v", err)
    }
    bzzport := ctx.GlobalString(SwarmPortFlag.Name)
    if len(bzzport) > 0 {
        bzzconfig.Port = bzzport
    }
    if bzzaddr := ctx.GlobalString(SwarmListenAddrFlag.Name); bzzaddr != "" {
        bzzconfig.ListenAddr = bzzaddr
    }
    swapEnabled := ctx.GlobalBool(SwarmSwapEnabledFlag.Name)
    syncEnabled := ctx.GlobalBoolT(SwarmSyncEnabledFlag.Name)

    swapapi := ctx.GlobalString(SwarmSwapAPIFlag.Name)
    if swapEnabled && swapapi == "" {
        utils.Fatalf("SWAP is enabled but --swap-api is not set")
    }

    ensapi := ctx.GlobalString(EnsAPIFlag.Name)
    ensAddr := ctx.GlobalString(EnsAddrFlag.Name)

    cors := ctx.GlobalString(CorsStringFlag.Name)

    boot := func(ctx *node.ServiceContext) (node.Service, error) {
        var swapClient *ethclient.Client
        if swapapi != "" {
            log.Info("connecting to SWAP API", "url", swapapi)
            swapClient, err = ethclient.Dial(swapapi)
            if err != nil {
                return nil, fmt.Errorf("error connecting to SWAP API %s: %s", swapapi, err)
            }
        }

        var ensClient *ethclient.Client
        if ensapi != "" {
            log.Info("connecting to ENS API", "url", ensapi)
            client, err := rpc.Dial(ensapi)
            if err != nil {
                return nil, fmt.Errorf("error connecting to ENS API %s: %s", ensapi, err)
            }
            ensClient = ethclient.NewClient(client)

            if ensAddr != "" {
                bzzconfig.EnsRoot = common.HexToAddress(ensAddr)
            } else {
                ensAddr, err := detectEnsAddr(client)
                if err == nil {
                    bzzconfig.EnsRoot = ensAddr
                } else {
                    log.Warn(fmt.Sprintf("could not determine ENS contract address, using default %s", bzzconfig.EnsRoot), "err", err)
                }
            }
        }

        return swarm.NewSwarm(ctx, swapClient, ensClient, bzzconfig, swapEnabled, syncEnabled, cors)
    }
    if err := stack.Register(boot); err != nil {
        utils.Fatalf("Failed to register the Swarm service: %v", err)
    }
}

func getAccount(ctx *cli.Context, stack *node.Node) *ecdsa.PrivateKey {
    keyid := ctx.GlobalString(SwarmAccountFlag.Name)

    if keyid == "" {
        utils.Fatalf("Option %q is required", SwarmAccountFlag.Name)
    }
    // Try to load the arg as a hex key file.
    if key, err := crypto.LoadECDSA(keyid); err == nil {
        log.Info("Swarm account key loaded", "address", crypto.PubkeyToAddress(key.PublicKey))
        return key
    }
    // Otherwise try getting it from the keystore.
    am := stack.AccountManager()
    ks := am.Backends(keystore.KeyStoreType)[0].(*keystore.KeyStore)

    return decryptStoreAccount(ks, keyid, utils.MakePasswordList(ctx))
}

func decryptStoreAccount(ks *keystore.KeyStore, account string, passwords []string) *ecdsa.PrivateKey {
    var a accounts.Account
    var err error
    if common.IsHexAddress(account) {
        a, err = ks.Find(accounts.Account{Address: common.HexToAddress(account)})
    } else if ix, ixerr := strconv.Atoi(account); ixerr == nil && ix > 0 {
        if accounts := ks.Accounts(); len(accounts) > ix {
            a = accounts[ix]
        } else {
            err = fmt.Errorf("index %d higher than number of accounts %d", ix, len(accounts))
        }
    } else {
        utils.Fatalf("Can't find swarm account key %s", account)
    }
    if err != nil {
        utils.Fatalf("Can't find swarm account key: %v", err)
    }
    keyjson, err := ioutil.ReadFile(a.URL.Path)
    if err != nil {
        utils.Fatalf("Can't load swarm account key: %v", err)
    }
    for i := 0; i < 3; i++ {
        password := getPassPhrase(fmt.Sprintf("Unlocking swarm account %s [%d/3]", a.Address.Hex(), i+1), i, passwords)
        key, err := keystore.DecryptKey(keyjson, password)
        if err == nil {
            return key.PrivateKey
        }
    }
    utils.Fatalf("Can't decrypt swarm account key")
    return nil
}

// getPassPhrase retrieves the password associated with bzz account, either by fetching
// from a list of pre-loaded passwords, or by requesting it interactively from user.
func getPassPhrase(prompt string, i int, passwords []string) string {
    // non-interactive
    if len(passwords) > 0 {
        if i < len(passwords) {
            return passwords[i]
        }
        return passwords[len(passwords)-1]
    }

    // fallback to interactive mode
    if prompt != "" {
        fmt.Println(prompt)
    }
    password, err := console.Stdin.PromptPassword("Passphrase: ")
    if err != nil {
        utils.Fatalf("Failed to read passphrase: %v", err)
    }
    return password
}

func injectBootnodes(srv *p2p.Server, nodes []string) {
    for _, url := range nodes {
        n, err := discover.ParseNode(url)
        if err != nil {
            log.Error("Invalid swarm bootnode", "err", err)
            continue
        }
        srv.AddPeer(n)
    }
}