cmd/bzzd: add swarm server daemon

cmd/bzzd/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 (
+	"crypto/ecdsa"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"runtime"
+	"strconv"
+
+	"github.com/ethereum/go-ethereum/accounts"
+	"github.com/ethereum/go-ethereum/cmd/utils"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/console"
+	"github.com/ethereum/go-ethereum/crypto"
+	"github.com/ethereum/go-ethereum/ethclient"
+	"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/node"
+	"github.com/ethereum/go-ethereum/p2p"
+	"github.com/ethereum/go-ethereum/p2p/discover"
+	"github.com/ethereum/go-ethereum/swarm"
+	bzzapi "github.com/ethereum/go-ethereum/swarm/api"
+	"gopkg.in/urfave/cli.v1"
+)
+
+const clientIdentifier = "bzzd"
+
+var (
+	gitCommit string // Git SHA1 commit hash of the release (set via linker flags)
+	app       = utils.NewApp(gitCommit, "Ethereum Swarm server daemon")
+)
+
+var (
+	ChequebookAddrFlag = cli.StringFlag{
+		Name:  "chequebook",
+		Usage: "chequebook contract address",
+	}
+	SwarmAccountFlag = cli.StringFlag{
+		Name:  "bzzaccount",
+		Usage: "Swarm account key file",
+	}
+	SwarmPortFlag = cli.StringFlag{
+		Name:  "bzzport",
+		Usage: "Swarm local http api port",
+	}
+	SwarmConfigPathFlag = cli.StringFlag{
+		Name:  "bzzconfig",
+		Usage: "Swarm config file path (datadir/bzz)",
+	}
+	SwarmSwapDisabled = cli.BoolFlag{
+		Name:  "bzznoswap",
+		Usage: "Swarm SWAP disabled (default false)",
+	}
+	SwarmSyncDisabled = cli.BoolFlag{
+		Name:  "bzznosync",
+		Usage: "Swarm Syncing disabled (default false)",
+	}
+	EthAPI = cli.StringFlag{
+		Name:  "ethapi",
+		Usage: "URL of the Ethereum API provider",
+		Value: node.DefaultIPCEndpoint("geth"),
+	}
+)
+
+var defaultBootnodes = []string{}
+
+func init() {
+	// Override flag defaults so bzzd can run alongside geth.
+	utils.ListenPortFlag.Value = 30399
+	utils.IPCPathFlag.Value = utils.DirectoryString{Value: "bzzd.ipc"}
+
+	// Set up the cli app.
+	app.Commands = nil
+	app.Action = bzzd
+	app.Flags = []cli.Flag{
+		utils.IdentityFlag,
+		utils.DataDirFlag,
+		utils.BootnodesFlag,
+		utils.KeyStoreDirFlag,
+		utils.ListenPortFlag,
+		utils.MaxPeersFlag,
+		utils.NATFlag,
+		utils.NodeKeyFileFlag,
+		utils.NodeKeyHexFlag,
+		utils.IPCDisabledFlag,
+		utils.IPCApiFlag,
+		utils.IPCPathFlag,
+		// bzzd-specific flags
+		EthAPI,
+		SwarmConfigPathFlag,
+		SwarmSwapDisabled,
+		SwarmSyncDisabled,
+		SwarmPortFlag,
+		SwarmAccountFlag,
+		ChequebookAddrFlag,
+	}
+	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 bzzd(ctx *cli.Context) error {
+	stack := utils.MakeNode(ctx, clientIdentifier, gitCommit)
+	registerBzzService(ctx, stack)
+	utils.StartNode(stack)
+
+	// Add bootnodes as initial peers.
+	if ctx.GlobalIsSet(utils.BootnodesFlag.Name) {
+		injectBootnodes(stack.Server(), ctx.GlobalStringSlice(utils.BootnodesFlag.Name))
+	} else {
+		injectBootnodes(stack.Server(), defaultBootnodes)
+	}
+
+	stack.Wait()
+	return nil
+}
+
+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)
+	if err != nil {
+		utils.Fatalf("unable to configure swarm: %v", err)
+	}
+	bzzport := ctx.GlobalString(SwarmPortFlag.Name)
+	if len(bzzport) > 0 {
+		bzzconfig.Port = bzzport
+	}
+	swapEnabled := !ctx.GlobalBool(SwarmSwapDisabled.Name)
+	syncEnabled := !ctx.GlobalBool(SwarmSyncDisabled.Name)
+
+	ethapi := ctx.GlobalString(EthAPI.Name)
+	if ethapi == "" {
+		utils.Fatalf("Option %q must not be empty", EthAPI.Name)
+	}
+
+	boot := func(ctx *node.ServiceContext) (node.Service, error) {
+		client, err := ethclient.Dial(ethapi)
+		if err != nil {
+			utils.Fatalf("Can't connect: %v", err)
+		}
+		return swarm.NewSwarm(ctx, client, bzzconfig, swapEnabled, syncEnabled)
+	}
+	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 {
+		glog.V(logger.Info).Infof("swarm account key loaded: %#x", crypto.PubkeyToAddress(key.PublicKey))
+		return key
+	}
+	// Otherwise try getting it from the keystore.
+	return decryptStoreAccount(stack.AccountManager(), keyid)
+}
+
+func decryptStoreAccount(accman *accounts.Manager, account string) *ecdsa.PrivateKey {
+	var a accounts.Account
+	var err error
+	if common.IsHexAddress(account) {
+		a, err = accman.Find(accounts.Account{Address: common.HexToAddress(account)})
+	} else if ix, ixerr := strconv.Atoi(account); ixerr == nil {
+		a, err = accman.AccountByIndex(ix)
+	} 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.File)
+	if err != nil {
+		utils.Fatalf("Can't load swarm account key: %v", err)
+	}
+	for i := 1; i <= 3; i++ {
+		passphrase := promptPassphrase(fmt.Sprintf("Unlocking swarm account %s [%d/3]", a.Address.Hex(), i))
+		key, err := accounts.DecryptKey(keyjson, passphrase)
+		if err == nil {
+			return key.PrivateKey
+		}
+	}
+	utils.Fatalf("Can't decrypt swarm account key")
+	return nil
+}
+
+func promptPassphrase(prompt string) string {
+	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 {
+			glog.Errorf("invalid bootnode %q", err)
+		}
+		srv.AddPeer(n)
+	}
+}