github.com/bcskill/bcschain/v3@v3.4.9-beta2/cmd/utils/flags.go

// Copyright 2015 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 utils contains internal helper functions for go-ethereum commands.
package utils

import (
	"bytes"
	"context"
	"crypto/ecdsa"
	"fmt"
	"io/ioutil"
	"math/big"
	"os"
	"path/filepath"
	"strconv"
	"strings"

	"github.com/bcskill/bcschain/v3/accounts"
	"github.com/bcskill/bcschain/v3/accounts/keystore"
	"github.com/bcskill/bcschain/v3/common"
	"github.com/bcskill/bcschain/v3/common/fdlimit"
	"github.com/bcskill/bcschain/v3/consensus"
	"github.com/bcskill/bcschain/v3/consensus/clique"
	"github.com/bcskill/bcschain/v3/core"
	"github.com/bcskill/bcschain/v3/core/rawdb"
	"github.com/bcskill/bcschain/v3/core/state"
	"github.com/bcskill/bcschain/v3/core/vm"
	"github.com/bcskill/bcschain/v3/crypto"
	"github.com/bcskill/bcschain/v3/eth"
	"github.com/bcskill/bcschain/v3/eth/downloader"
	"github.com/bcskill/bcschain/v3/eth/gasprice"
	"github.com/bcskill/bcschain/v3/ethdb"
	"github.com/bcskill/bcschain/v3/les"
	"github.com/bcskill/bcschain/v3/log"
	"github.com/bcskill/bcschain/v3/metrics"
	"github.com/bcskill/bcschain/v3/netstats"
	"github.com/bcskill/bcschain/v3/node"
	"github.com/bcskill/bcschain/v3/p2p"
	"github.com/bcskill/bcschain/v3/p2p/discover"
	"github.com/bcskill/bcschain/v3/p2p/nat"
	"github.com/bcskill/bcschain/v3/p2p/netutil"
	"github.com/bcskill/bcschain/v3/params"
	whisper "github.com/bcskill/bcschain/v3/whisper/whisperv6"
	"github.com/urfave/cli"
)

var (
	CommandHelpTemplate = `{{.cmd.Name}}{{if .cmd.Subcommands}} command{{end}}{{if .cmd.Flags}} [command options]{{end}} [arguments...]
{{if .cmd.Description}}{{.cmd.Description}}
{{end}}{{if .cmd.Subcommands}}
SUBCOMMANDS:
	{{range .cmd.Subcommands}}{{.Name}}{{with .ShortName}}, {{.}}{{end}}{{ "\t" }}{{.Usage}}
	{{end}}{{end}}{{if .categorizedFlags}}
{{range $idx, $categorized := .categorizedFlags}}{{$categorized.Name}} OPTIONS:
{{range $categorized.Flags}}{{"\t"}}{{.}}
{{end}}
{{end}}{{end}}`
)

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 = CommandHelpTemplate
}

// NewApp creates an app with sane defaults.
func NewApp(gitCommit, usage string) *cli.App {
	app := cli.NewApp()
	app.Name = filepath.Base(os.Args[0])
	app.Author = ""
	//app.Authors = nil
	app.Email = ""
	app.Version = params.Version
	if len(gitCommit) >= 8 {
		app.Version += "-" + gitCommit[:8]
	}
	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
	DataDirFlag = DirectoryFlag{
		Name:  "datadir",
		Usage: "Data directory for the databases and keystore",
		Value: DirectoryString{node.DefaultDataDir()},
	}
	KeyStoreDirFlag = DirectoryFlag{
		Name:  "keystore",
		Usage: "Directory for the keystore (default = inside the datadir)",
	}
	NoUSBFlag = cli.BoolFlag{
		Name:  "nousb",
		Usage: "Disables monitoring for and managing USB hardware wallets",
	}
	NetworkIdFlag = cli.Uint64Flag{
		Name:  "networkid",
		Usage: "Network identifier (integer, 60=mainnet, 31337=testnet)",
		Value: eth.DefaultConfig.NetworkId,
	}
	TestnetFlag = cli.BoolFlag{
		Name:  "testnet",
		Usage: "Gochain test network: pre-configured test network",
	}
	ConstantinopleOverrideFlag = cli.Uint64Flag{
		Name:  "override.constantinople",
		Usage: "Manually specify constantinople fork-block, overriding the bundled setting",
	}
	DeveloperFlag = cli.BoolFlag{
		Name:  "dev",
		Usage: "Ephemeral network with a pre-funded developer account",
	}
	DeveloperPeriodFlag = cli.IntFlag{
		Name:  "dev.period",
		Usage: "Block period to use in developer mode (0 = mine only if transaction pending)",
		Value: params.DefaultCliquePeriod,
	}
	LocalFlag = cli.BoolFlag{
		Name:  "local",
		Usage: "Persistent network with pre-funded accounts.",
	}
	LocalFundFlag = cli.StringSliceFlag{
		Name:  "local.fund",
		Usage: "Comma separated list of accounts (and optionally balances) to pre-fund: <addr> or <addr>:<amount>",
	}
	IdentityFlag = cli.StringFlag{
		Name:  "identity",
		Usage: "Custom node name",
	}
	DocRootFlag = DirectoryFlag{
		Name:  "docroot",
		Usage: "Document Root for HTTPClient file scheme",
		Value: DirectoryString{homeDir()},
	}
	FastSyncFlag = cli.BoolFlag{
		Name:  "fast",
		Usage: "Enable fast syncing through state downloads",
	}
	LightModeFlag = cli.BoolFlag{
		Name:  "light",
		Usage: "Enable light client mode",
	}
	defaultSyncMode = eth.DefaultConfig.SyncMode
	SyncModeFlag    = TextMarshalerFlag{
		Name:  "syncmode",
		Usage: `Blockchain sync mode ("fast", "full", or "light")`,
		Value: &defaultSyncMode,
	}
	GCModeFlag = cli.StringFlag{
		Name:  "gcmode",
		Usage: `Blockchain garbage collection mode ("full", "archive")`,
		Value: "full",
	}
	LightServFlag = cli.IntFlag{
		Name:  "lightserv",
		Usage: "Maximum percentage of time allowed for serving LES requests (0-90)",
		Value: 0,
	}
	LightPeersFlag = cli.IntFlag{
		Name:  "lightpeers",
		Usage: "Maximum number of LES client peers",
		Value: eth.DefaultConfig.LightPeers,
	}
	LightKDFFlag = cli.BoolFlag{
		Name:  "lightkdf",
		Usage: "Reduce key-derivation RAM & CPU usage at some expense of KDF strength",
	}
	// Transaction pool settings
	TxPoolLocalsFlag = cli.StringFlag{
		Name:  "txpool.locals",
		Usage: "Comma separated accounts to treat as locals (no flush, priority inclusion)",
	}
	TxPoolNoLocalsFlag = cli.BoolFlag{
		Name:  "txpool.nolocals",
		Usage: "Disables price exemptions for locally submitted transactions",
	}
	TxPoolJournalFlag = cli.StringFlag{
		Name:  "txpool.journal",
		Usage: "Disk journal for local transaction to survive node restarts",
		Value: core.DefaultTxPoolConfig.Journal,
	}
	TxPoolRejournalFlag = cli.DurationFlag{
		Name:  "txpool.rejournal",
		Usage: "Time interval to regenerate the local transaction journal",
		Value: core.DefaultTxPoolConfig.Rejournal,
	}
	TxPoolPriceLimitFlag = cli.Uint64Flag{
		Name:  "txpool.pricelimit",
		Usage: "Minimum gas price limit to enforce for acceptance into the pool",
		Value: eth.DefaultConfig.TxPool.PriceLimit,
	}
	TxPoolPriceBumpFlag = cli.Uint64Flag{
		Name:  "txpool.pricebump",
		Usage: "Price bump percentage to replace an already existing transaction",
		Value: eth.DefaultConfig.TxPool.PriceBump,
	}
	TxPoolAccountSlotsFlag = cli.Uint64Flag{
		Name:  "txpool.accountslots",
		Usage: "Minimum number of executable transaction slots guaranteed per account",
		Value: eth.DefaultConfig.TxPool.AccountSlots,
	}
	TxPoolGlobalSlotsFlag = cli.Uint64Flag{
		Name:  "txpool.globalslots",
		Usage: "Maximum number of executable transaction slots for all accounts",
		Value: eth.DefaultConfig.TxPool.GlobalSlots,
	}
	TxPoolAccountQueueFlag = cli.Uint64Flag{
		Name:  "txpool.accountqueue",
		Usage: "Maximum number of non-executable transaction slots permitted per account",
		Value: eth.DefaultConfig.TxPool.AccountQueue,
	}
	TxPoolGlobalQueueFlag = cli.Uint64Flag{
		Name:  "txpool.globalqueue",
		Usage: "Maximum number of non-executable transaction slots for all accounts",
		Value: eth.DefaultConfig.TxPool.GlobalQueue,
	}
	TxPoolLifetimeFlag = cli.DurationFlag{
		Name:  "txpool.lifetime",
		Usage: "Maximum amount of time non-executable transaction are queued",
		Value: eth.DefaultConfig.TxPool.Lifetime,
	}
	// Performance tuning settings
	CacheFlag = cli.IntFlag{
		Name:  "cache",
		Usage: "Megabytes of memory allocated to internal caching",
		Value: 1024,
	}
	CacheDatabaseFlag = cli.IntFlag{
		Name:  "cache.database",
		Usage: "Percentage of cache memory allowance to use for database io",
		Value: 75,
	}
	CacheGCFlag = cli.IntFlag{
		Name:  "cache.gc",
		Usage: "Percentage of cache memory allowance to use for trie pruning",
		Value: 25,
	}
	TrieCacheGenFlag = cli.IntFlag{
		Name:  "trie-cache-gens",
		Usage: "Number of trie node generations to keep in memory",
		Value: int(state.MaxTrieCacheGen),
	}
	// Miner settings
	MiningEnabledFlag = cli.BoolFlag{
		Name:  "mine",
		Usage: "Enable mining",
	}
	MinerThreadsFlag = cli.IntFlag{
		Name:  "miner.threads",
		Usage: "Number of CPU threads to use for mining",
		Value: 0,
	}
	MinerLegacyThreadsFlag = cli.IntFlag{
		Name:  "minerthreads",
		Usage: "Number of CPU threads to use for mining (deprecated, use --miner.threads)",
		Value: 0,
	}
	MinerNotifyFlag = cli.StringFlag{
		Name:  "miner.notify",
		Usage: "Comma separated HTTP URL list to notify of new work packages",
	}
	MinerGasTargetFlag = cli.Uint64Flag{
		Name:  "miner.gastarget",
		Usage: "Target gas floor for mined blocks",
		Value: eth.DefaultConfig.MinerGasFloor,
	}
	MinerLegacyGasTargetFlag = cli.Uint64Flag{
		Name:  "targetgaslimit",
		Usage: "Target gas floor for mined blocks (deprecated, use --miner.gastarget)",
		Value: eth.DefaultConfig.MinerGasFloor,
	}
	MinerGasLimitFlag = cli.Uint64Flag{
		Name:  "miner.gaslimit",
		Usage: "Target gas ceiling for mined blocks",
		Value: eth.DefaultConfig.MinerGasCeil,
	}
	MinerGasPriceFlag = BigFlag{
		Name:  "miner.gasprice",
		Usage: "Minimum gas price for mining a transaction",
		Value: eth.DefaultConfig.MinerGasPrice,
	}
	MinerLegacyGasPriceFlag = BigFlag{
		Name:  "gasprice",
		Usage: "Minimum gas price for mining a transaction (deprecated, use --miner.gasprice)",
		Value: eth.DefaultConfig.MinerGasPrice,
	}
	MinerEtherbaseFlag = cli.StringFlag{
		Name:  "miner.etherbase",
		Usage: "Public address for block mining rewards (default = first account)",
		Value: "0",
	}
	MinerLegacyEtherbaseFlag = cli.StringFlag{
		Name:  "etherbase",
		Usage: "Public address for block mining rewards (default = first account, deprecated, use --miner.etherbase)",
		Value: "0",
	}
	MinerExtraDataFlag = cli.StringFlag{
		Name:  "miner.extradata",
		Usage: "Block extra data set by the miner (default = client version)",
	}
	MinerLegacyExtraDataFlag = cli.StringFlag{
		Name:  "extradata",
		Usage: "Block extra data set by the miner (default = client version, deprecated, use --miner.extradata)",
	}
	MinerRecommitIntervalFlag = cli.DurationFlag{
		Name:  "miner.recommit",
		Usage: "Time interval to recreate the block being mined",
		Value: eth.DefaultConfig.MinerRecommit,
	}
	MinerNoVerfiyFlag = cli.BoolFlag{
		Name:  "miner.noverify",
		Usage: "Disable remote sealing verification",
	}
	// Account settings
	UnlockedAccountFlag = cli.StringFlag{
		Name:  "unlock",
		Usage: "Comma separated list of accounts to unlock",
		Value: "",
	}
	PasswordFileFlag = cli.StringFlag{
		Name:  "password",
		Usage: "Password file to use for non-interactive password input",
		Value: "",
	}

	VMEnableDebugFlag = cli.BoolFlag{
		Name:  "vmdebug",
		Usage: "Record information useful for VM and contract debugging",
	}
	// Logging and debug settings
	NetStatsURLFlag = cli.StringFlag{
		Name:  "netstats",
		Usage: "Reporting URL of a netstats service (nodename:secret@host:port)",
	}
	MetricsEnabledFlag = cli.BoolFlag{
		Name:  metrics.MetricsEnabledFlag,
		Usage: "Enable metrics collection and reporting",
	}
	TracingStackdriverFlag = cli.StringFlag{
		Name:  "tracing.stackdriver",
		Usage: "GCP Project ID to enable stackdriver tracing",
	}
	TracingSampleRateFlag = cli.Float64Flag{
		Name:  "tracing.samplerate",
		Usage: "Tracing sample rate",
	}
	FakePoWFlag = cli.BoolFlag{
		Name:  "fakepow",
		Usage: "Disables proof-of-work verification",
	}
	NoCompactionFlag = cli.BoolFlag{
		Name:  "nocompaction",
		Usage: "Disables db compaction after import",
	}
	// RPC settings
	RPCEnabledFlag = cli.BoolFlag{
		Name:  "rpc",
		Usage: "Enable the HTTP-RPC server",
	}
	RPCListenAddrFlag = cli.StringFlag{
		Name:  "rpcaddr",
		Usage: "HTTP-RPC server listening interface",
		Value: node.DefaultHTTPHost,
	}
	RPCPortFlag = cli.IntFlag{
		Name:  "rpcport",
		Usage: "HTTP-RPC server listening port",
		Value: node.DefaultHTTPPort,
	}
	RPCCORSDomainFlag = cli.StringFlag{
		Name:  "rpccorsdomain",
		Usage: "Comma separated list of domains from which to accept cross origin requests (browser enforced)",
		Value: "",
	}
	RPCVirtualHostsFlag = cli.StringFlag{
		Name:  "rpcvhosts",
		Usage: "Comma separated list of virtual hostnames from which to accept requests (server enforced). Accepts global ('*') or subdomain ('*.example.com') wildcards.",
		Value: "localhost",
	}
	RPCApiFlag = cli.StringFlag{
		Name:  "rpcapi",
		Usage: "API's offered over the HTTP-RPC interface",
		Value: "",
	}
	IPCDisabledFlag = cli.BoolFlag{
		Name:  "ipcdisable",
		Usage: "Disable the IPC-RPC server",
	}
	IPCPathFlag = DirectoryFlag{
		Name:  "ipcpath",
		Usage: "Filename for IPC socket/pipe within the datadir (explicit paths escape it)",
	}
	WSEnabledFlag = cli.BoolFlag{
		Name:  "ws",
		Usage: "Enable the WS-RPC server",
	}
	WSListenAddrFlag = cli.StringFlag{
		Name:  "wsaddr",
		Usage: "WS-RPC server listening interface",
		Value: node.DefaultWSHost,
	}
	WSPortFlag = cli.IntFlag{
		Name:  "wsport",
		Usage: "WS-RPC server listening port",
		Value: node.DefaultWSPort,
	}
	WSApiFlag = cli.StringFlag{
		Name:  "wsapi",
		Usage: "API's offered over the WS-RPC interface",
		Value: "",
	}
	WSAllowedOriginsFlag = cli.StringFlag{
		Name:  "wsorigins",
		Usage: "Origins from which to accept websockets requests",
		Value: "",
	}
	ExecFlag = cli.StringFlag{
		Name:  "exec",
		Usage: "Execute JavaScript statement",
	}
	PreloadJSFlag = cli.StringFlag{
		Name:  "preload",
		Usage: "Comma separated list of JavaScript files to preload into the console",
	}

	// Network Settings
	MaxPeersFlag = cli.IntFlag{
		Name:  "maxpeers",
		Usage: "Maximum number of network peers (network disabled if set to 0)",
		Value: 25,
	}
	MaxPendingPeersFlag = cli.IntFlag{
		Name:  "maxpendpeers",
		Usage: "Maximum number of pending connection attempts (defaults used if set to 0)",
		Value: 0,
	}
	ListenPortFlag = cli.IntFlag{
		Name:  "port",
		Usage: "Network listening port",
		Value: 30303,
	}
	BootnodesFlag = cli.StringFlag{
		Name:  "bootnodes",
		Usage: "Comma separated enode URLs for P2P discovery bootstrap (set v4+v5 instead for light servers)",
		Value: "",
	}
	BootnodesV4Flag = cli.StringFlag{
		Name:  "bootnodesv4",
		Usage: "Comma separated enode URLs for P2P v4 discovery bootstrap (light server, full nodes)",
		Value: "",
	}
	BootnodesV5Flag = cli.StringFlag{
		Name:  "bootnodesv5",
		Usage: "Comma separated enode URLs for P2P v5 discovery bootstrap (light server, light nodes)",
		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: "NAT port mapping mechanism (any|none|upnp|pmp|extip:<IP>)",
		Value: "any",
	}
	NoDiscoverFlag = cli.BoolFlag{
		Name:  "nodiscover",
		Usage: "Disables the peer discovery mechanism (manual peer addition)",
	}
	DiscoveryV5Flag = cli.BoolFlag{
		Name:  "v5disc",
		Usage: "Enables the experimental RLPx V5 (Topic Discovery) mechanism",
	}
	NetrestrictFlag = cli.StringFlag{
		Name:  "netrestrict",
		Usage: "Restricts network communication to the given IP networks (CIDR masks)",
	}

	// ATM the url is left to the user and deployment to
	JSpathFlag = cli.StringFlag{
		Name:  "jspath",
		Usage: "JavaScript root path for `loadScript`",
		Value: ".",
	}

	// Gas price oracle settings
	GpoBlocksFlag = cli.IntFlag{
		Name:  "gpoblocks",
		Usage: "Number of recent blocks to check for gas prices",
		Value: eth.DefaultConfig.GPO.Blocks,
	}
	GpoPercentileFlag = cli.IntFlag{
		Name:  "gpopercentile",
		Usage: "Suggested gas price is the given percentile of a set of recent transaction gas prices",
		Value: eth.DefaultConfig.GPO.Percentile,
	}
	GpoMaxGasPriceFlag = cli.Int64Flag{
		Name:  "gpomaxprice",
		Usage: "Maximum gas price will be recommended by gpo",
		Value: eth.DefaultConfig.GPO.MaxPrice.Int64(),
	}
	WhisperEnabledFlag = cli.BoolFlag{
		Name:  "shh",
		Usage: "Enable Whisper",
	}
	WhisperMaxMessageSizeFlag = cli.IntFlag{
		Name:  "shh.maxmessagesize",
		Usage: "Max message size accepted",
		Value: int(whisper.DefaultMaxMessageSize),
	}
	WhisperMinPOWFlag = cli.Float64Flag{
		Name:  "shh.pow",
		Usage: "Minimum POW accepted",
		Value: whisper.DefaultMinimumPoW,
	}

	// S3 archival settings
	EthdbEndpointFlag = cli.StringFlag{
		Name:  "ethdb.endpoint",
		Usage: "S3 compatible archive endpoint.",
	}
	EthdbBucketFlag = cli.StringFlag{
		Name:  "ethdb.bucket",
		Usage: "Name of ethdb archive bucket. Must already exist.",
	}
	EthdbAccessKeyIDFlag = cli.StringFlag{
		Name:  "ethdb.accesskeyid",
		Usage: "Ethdb archive access key ID.",
	}
	EthdbSecretAccessKeyFlag = cli.StringFlag{
		Name:  "ethdb.secretaccesskey",
		Usage: "Ethdb archive secret access key.",
	}
	EthdbMaxOpenSegmentCountFlag = cli.IntFlag{
		Name:  "ethdb.maxopensegmentcount",
		Usage: "Ethdb per-table open segment count.",
	}

	EWASMInterpreterFlag = cli.StringFlag{
		Name:  "vm.ewasm",
		Usage: "External ewasm configuration (default = built-in interpreter)",
		Value: "",
	}
	EVMInterpreterFlag = cli.StringFlag{
		Name:  "vm.evm",
		Usage: "External EVM configuration (default = built-in interpreter)",
		Value: "",
	}
)

// MakeDataDir retrieves the currently requested data directory, terminating
// if none (or the empty string) is specified. If the node is starting a testnet,
// the a subdirectory of the specified datadir will be used.
func MakeDataDir(ctx *cli.Context) string {
	if path := ctx.GlobalString(DataDirFlag.Name); path != "" {
		if ctx.GlobalBool(TestnetFlag.Name) {
			return filepath.Join(path, "testnet")
		}
		return path
	}
	Fatalf("Cannot determine default data directory, please set manually (--datadir)")
	return ""
}

// setNodeKey creates a node key from set command line flags, either loading it
// from a file or as a specified hex value. If neither flags were provided, this
// method returns nil and an emphemeral key is to be generated.
func setNodeKey(ctx *cli.Context, cfg *p2p.Config) {
	var (
		hex  = ctx.GlobalString(NodeKeyHexFlag.Name)
		file = ctx.GlobalString(NodeKeyFileFlag.Name)
		key  *ecdsa.PrivateKey
		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)
		}
		cfg.PrivateKey = key
	case hex != "":
		if key, err = crypto.HexToECDSA(hex); err != nil {
			Fatalf("Option %q: %v", NodeKeyHexFlag.Name, err)
		}
		cfg.PrivateKey = key
	}
}

// setNodeUserIdent creates the user identifier from CLI flags.
func setNodeUserIdent(ctx *cli.Context, cfg *node.Config) {
	if identity := ctx.GlobalString(IdentityFlag.Name); len(identity) > 0 {
		cfg.UserIdent = identity
	}
}

// setBootstrapNodes creates a list of bootstrap nodes from the command line
// flags, reverting to pre-configured ones if none have been specified.
func setBootstrapNodes(ctx *cli.Context, cfg *p2p.Config) {
	urls := params.MainnetBootnodes
	switch {
	case ctx.GlobalIsSet(BootnodesFlag.Name):
		urls = strings.Split(ctx.GlobalString(BootnodesFlag.Name), ",")
	case ctx.GlobalBool(TestnetFlag.Name):
		urls = params.TestnetBootnodes
	case cfg.BootstrapNodes != nil:
		return // already set, don't apply defaults.
	}

	cfg.BootstrapNodes = make([]*discover.Node, 0, len(urls))
	for _, url := range urls {
		node, err := discover.ParseNode(url)
		if err != nil {
			log.Error("Bootstrap URL invalid", "enode", url, "err", err)
			continue
		}
		cfg.BootstrapNodes = append(cfg.BootstrapNodes, node)
	}
}

// setListenAddress creates a TCP listening address string from set command
// line flags.
func setListenAddress(ctx *cli.Context, cfg *p2p.Config) {
	if ctx.GlobalIsSet(ListenPortFlag.Name) {
		cfg.ListenAddr = fmt.Sprintf(":%d", ctx.GlobalInt(ListenPortFlag.Name))
	}
}

// setNAT creates a port mapper from command line flags.
func setNAT(ctx *cli.Context, cfg *p2p.Config) {
	if ctx.GlobalIsSet(NATFlag.Name) {
		natif, err := nat.Parse(ctx.GlobalString(NATFlag.Name))
		if err != nil {
			Fatalf("Option %s: %v", NATFlag.Name, err)
		}
		cfg.NAT = natif
	}
}

// splitAndTrim splits input separated by a comma
// and trims excessive white space from the substrings.
func splitAndTrim(input string) []string {
	result := strings.Split(input, ",")
	for i, r := range result {
		result[i] = strings.TrimSpace(r)
	}
	return result
}

// setHTTP creates the HTTP RPC listener interface string from the set
// command line flags, returning empty if the HTTP endpoint is disabled.
func setHTTP(ctx *cli.Context, cfg *node.Config) {
	if ctx.GlobalBool(RPCEnabledFlag.Name) && cfg.HTTPHost == "" || ctx.GlobalBool(LocalFlag.Name) {
		cfg.HTTPHost = "127.0.0.1"
		if ctx.GlobalIsSet(RPCListenAddrFlag.Name) {
			cfg.HTTPHost = ctx.GlobalString(RPCListenAddrFlag.Name)
		} else if ctx.GlobalBool(LocalFlag.Name) {
			cfg.HTTPHost = "0.0.0.0"
		}
	}

	if ctx.GlobalIsSet(RPCPortFlag.Name) {
		cfg.HTTPPort = ctx.GlobalInt(RPCPortFlag.Name)
	}
	if ctx.GlobalIsSet(RPCCORSDomainFlag.Name) {
		cfg.HTTPCors = splitAndTrim(ctx.GlobalString(RPCCORSDomainFlag.Name))
	}
	if ctx.GlobalIsSet(RPCApiFlag.Name) {
		cfg.HTTPModules = splitAndTrim(ctx.GlobalString(RPCApiFlag.Name))
	}

	cfg.HTTPVirtualHosts = splitAndTrim(ctx.GlobalString(RPCVirtualHostsFlag.Name))
	cfg.HTTPTracing = ctx.GlobalIsSet(TracingStackdriverFlag.Name)
}

// setWS creates the WebSocket RPC listener interface string from the set
// command line flags, returning empty if the HTTP endpoint is disabled.
func setWS(ctx *cli.Context, cfg *node.Config) {
	if ctx.GlobalBool(WSEnabledFlag.Name) && cfg.WSHost == "" || ctx.GlobalBool(LocalFlag.Name) {
		cfg.WSHost = "127.0.0.1"
		if ctx.GlobalIsSet(WSListenAddrFlag.Name) {
			cfg.WSHost = ctx.GlobalString(WSListenAddrFlag.Name)
		} else if ctx.GlobalBool(LocalFlag.Name) {
			cfg.WSHost = "0.0.0.0"
		}
	}

	if ctx.GlobalIsSet(WSPortFlag.Name) {
		cfg.WSPort = ctx.GlobalInt(WSPortFlag.Name)
	}
	if ctx.GlobalIsSet(WSAllowedOriginsFlag.Name) {
		cfg.WSOrigins = splitAndTrim(ctx.GlobalString(WSAllowedOriginsFlag.Name))
	} else if ctx.GlobalBool(LocalFlag.Name) {
		cfg.WSOrigins = []string{"*"}
	}
	if ctx.GlobalIsSet(WSApiFlag.Name) {
		cfg.WSModules = splitAndTrim(ctx.GlobalString(WSApiFlag.Name))
	}
}

// setIPC creates an IPC path configuration from the set command line flags,
// returning an empty string if IPC was explicitly disabled, or the set path.
func setIPC(ctx *cli.Context, cfg *node.Config) {
	CheckExclusive(ctx, IPCDisabledFlag, IPCPathFlag)
	switch {
	case ctx.GlobalBool(IPCDisabledFlag.Name):
		cfg.IPCPath = ""
	case ctx.GlobalIsSet(IPCPathFlag.Name):
		cfg.IPCPath = ctx.GlobalString(IPCPathFlag.Name)
	}
}

// makeDatabaseHandles raises out the number of allowed file handles per process
// for GoChain and returns half of the allowance to assign to the database.
func makeDatabaseHandles() int {
	limit, err := fdlimit.Current()
	if err != nil {
		Fatalf("Failed to retrieve file descriptor allowance: %v", err)
	}
	if limit < 2048 {
		if err := fdlimit.Raise(2048); err != nil {
			Fatalf("Failed to raise file descriptor allowance: %v", err)
		}
	}
	if limit > 2048 { // cap database file descriptors even if more is available
		limit = 2048
	}
	return limit / 2 // Leave half for networking and other stuff
}

// MakeAddress converts an account specified directly as a hex encoded string or
// a key index in the key store to an internal account representation.
func MakeAddress(ks *keystore.KeyStore, account string) (accounts.Account, error) {
	// If the specified account is a valid address, return it
	if common.IsHexAddress(account) {
		return accounts.Account{Address: common.HexToAddress(account)}, nil
	}
	// Otherwise try to interpret the account as a keystore index
	index, err := strconv.Atoi(account)
	if err != nil || index < 0 {
		return accounts.Account{}, fmt.Errorf("invalid account address or index %q", account)
	}
	log.Warn("-------------------------------------------------------------------")
	log.Warn("Referring to accounts by order in the keystore folder is dangerous!")
	log.Warn("This functionality is deprecated and will be removed in the future!")
	log.Warn("Please use explicit addresses! (can search via `geth account list`)")
	log.Warn("-------------------------------------------------------------------")

	accs := ks.Accounts()
	if len(accs) <= index {
		return accounts.Account{}, fmt.Errorf("index %d higher than number of accounts %d", index, len(accs))
	}
	return accs[index], nil
}

// setEtherbase retrieves the etherbase either from the directly specified
// command line flags or from the keystore if CLI indexed.
func setEtherbase(ctx *cli.Context, ks *keystore.KeyStore, cfg *eth.Config) {
	// Extract the current etherbase, new flag overriding legacy one
	var etherbase string
	if ctx.GlobalIsSet(MinerLegacyEtherbaseFlag.Name) {
		etherbase = ctx.GlobalString(MinerLegacyEtherbaseFlag.Name)
	}
	if ctx.GlobalIsSet(MinerEtherbaseFlag.Name) {
		etherbase = ctx.GlobalString(MinerEtherbaseFlag.Name)
	}
	// Convert the etherbase into an address and configure it
	if etherbase != "" {
		account, err := MakeAddress(ks, etherbase)
		if err != nil {
			Fatalf("Invalid miner etherbase: %v", err)
		}
		cfg.Etherbase = account.Address
	}
}

// MakePasswordList reads password lines from the file specified by the global --password flag.
func MakePasswordList(ctx *cli.Context) []string {
	path := ctx.GlobalString(PasswordFileFlag.Name)
	if path == "" {
		return nil
	}
	text, err := ioutil.ReadFile(path)
	if err != nil {
		Fatalf("Failed to read password file: %v", err)
	}
	lines := strings.Split(string(text), "\n")
	// Sanitise DOS line endings.
	for i := range lines {
		lines[i] = strings.TrimRight(lines[i], "\r")
	}
	return lines
}

func SetP2PConfig(ctx *cli.Context, cfg *p2p.Config) {
	setNodeKey(ctx, cfg)
	setNAT(ctx, cfg)
	setListenAddress(ctx, cfg)
	setBootstrapNodes(ctx, cfg)

	lightClient := ctx.GlobalBool(LightModeFlag.Name) || ctx.GlobalString(SyncModeFlag.Name) == "light"
	lightServer := ctx.GlobalInt(LightServFlag.Name) != 0
	lightPeers := ctx.GlobalInt(LightPeersFlag.Name)

	if ctx.GlobalIsSet(MaxPeersFlag.Name) {
		cfg.MaxPeers = ctx.GlobalInt(MaxPeersFlag.Name)
	} else {
		if lightServer {
			cfg.MaxPeers += lightPeers
		}
		if lightClient && ctx.GlobalIsSet(LightPeersFlag.Name) && cfg.MaxPeers < lightPeers {
			cfg.MaxPeers = lightPeers
		}
	}
	if !(lightClient || lightServer) {
		lightPeers = 0
	}
	ethPeers := cfg.MaxPeers - lightPeers
	if lightClient {
		ethPeers = 0
	}
	log.Info("Maximum peer count", "ETH", ethPeers, "LES", lightPeers, "total", cfg.MaxPeers)

	if ctx.GlobalIsSet(MaxPendingPeersFlag.Name) {
		cfg.MaxPendingPeers = ctx.GlobalInt(MaxPendingPeersFlag.Name)
	}
	if ctx.GlobalIsSet(NoDiscoverFlag.Name) || lightClient {
		cfg.NoDiscovery = true
	}

	// if we're running a light client or server, force enable the v5 peer discovery
	// unless it is explicitly disabled with --nodiscover note that explicitly specifying
	// --v5disc overrides --nodiscover, in which case the later only disables v4 discovery
	forceV5Discovery := (lightClient || lightServer) && !ctx.GlobalBool(NoDiscoverFlag.Name)
	if ctx.GlobalIsSet(DiscoveryV5Flag.Name) {
		cfg.DiscoveryV5 = ctx.GlobalBool(DiscoveryV5Flag.Name)
	} else if forceV5Discovery {
		cfg.DiscoveryV5 = true
	}

	if netrestrict := ctx.GlobalString(NetrestrictFlag.Name); netrestrict != "" {
		list, err := netutil.ParseNetlist(netrestrict)
		if err != nil {
			Fatalf("Option %q: %v", NetrestrictFlag.Name, err)
		}
		cfg.NetRestrict = list
	}

	if ctx.GlobalBool(DeveloperFlag.Name) || ctx.GlobalBool(LocalFlag.Name) {
		// --dev mode can't use p2p networking.
		cfg.MaxPeers = 0
		cfg.ListenAddr = ":0"
		cfg.NoDiscovery = true
		cfg.DiscoveryV5 = false
	}
}

// SetNodeConfig applies node-related command line flags to the config.
func SetNodeConfig(ctx *cli.Context, cfg *node.Config) {
	SetP2PConfig(ctx, &cfg.P2P)
	setIPC(ctx, cfg)
	setHTTP(ctx, cfg)
	setWS(ctx, cfg)
	setNodeUserIdent(ctx, cfg)
	setEthdb(ctx, &cfg.Ethdb)

	switch {
	case ctx.GlobalIsSet(DataDirFlag.Name):
		cfg.DataDir = ctx.GlobalString(DataDirFlag.Name)
	case ctx.GlobalBool(DeveloperFlag.Name):
		cfg.DataDir = "" // unless explicitly requested, use memory databases
	case ctx.GlobalBool(LocalFlag.Name):
		cfg.DataDir = filepath.Join(node.DefaultDataDir(), "local")
	case ctx.GlobalBool(TestnetFlag.Name):
		cfg.DataDir = filepath.Join(node.DefaultDataDir(), "testnet")
	}

	if ctx.GlobalIsSet(KeyStoreDirFlag.Name) {
		cfg.KeyStoreDir = ctx.GlobalString(KeyStoreDirFlag.Name)
	}
	if ctx.GlobalIsSet(LightKDFFlag.Name) {
		cfg.UseLightweightKDF = ctx.GlobalBool(LightKDFFlag.Name)
	}
	if ctx.GlobalIsSet(NoUSBFlag.Name) {
		cfg.NoUSB = ctx.GlobalBool(NoUSBFlag.Name)
	}
}

func setGPO(ctx *cli.Context, cfg *gasprice.Config) {
	if ctx.GlobalIsSet(GpoBlocksFlag.Name) {
		cfg.Blocks = ctx.GlobalInt(GpoBlocksFlag.Name)
	}
	if ctx.GlobalIsSet(GpoPercentileFlag.Name) {
		cfg.Percentile = ctx.GlobalInt(GpoPercentileFlag.Name)
	}
	if ctx.GlobalIsSet(GpoMaxGasPriceFlag.Name) {
		cfg.MaxPrice = big.NewInt(ctx.GlobalInt64(GpoMaxGasPriceFlag.Name))
	}
}

func setTxPool(ctx *cli.Context, cfg *core.TxPoolConfig) {
	if ctx.GlobalIsSet(TxPoolLocalsFlag.Name) {
		locals := strings.Split(ctx.GlobalString(TxPoolLocalsFlag.Name), ",")
		for _, account := range locals {
			if trimmed := strings.TrimSpace(account); !common.IsHexAddress(trimmed) {
				Fatalf("Invalid account in --txpool.locals: %s", trimmed)
			} else {
				cfg.Locals = append(cfg.Locals, common.HexToAddress(account))
			}
		}
	}
	if ctx.GlobalIsSet(TxPoolNoLocalsFlag.Name) {
		cfg.NoLocals = ctx.GlobalBool(TxPoolNoLocalsFlag.Name)
	}
	if ctx.GlobalIsSet(TxPoolJournalFlag.Name) {
		cfg.Journal = ctx.GlobalString(TxPoolJournalFlag.Name)
	}
	if ctx.GlobalIsSet(TxPoolRejournalFlag.Name) {
		cfg.Rejournal = ctx.GlobalDuration(TxPoolRejournalFlag.Name)
	}
	if ctx.GlobalIsSet(TxPoolPriceLimitFlag.Name) {
		cfg.PriceLimit = ctx.GlobalUint64(TxPoolPriceLimitFlag.Name)
	}
	if ctx.GlobalIsSet(TxPoolPriceBumpFlag.Name) {
		cfg.PriceBump = ctx.GlobalUint64(TxPoolPriceBumpFlag.Name)
	}
	if ctx.GlobalIsSet(TxPoolAccountSlotsFlag.Name) {
		cfg.AccountSlots = ctx.GlobalUint64(TxPoolAccountSlotsFlag.Name)
	}
	if ctx.GlobalIsSet(TxPoolGlobalSlotsFlag.Name) {
		cfg.GlobalSlots = ctx.GlobalUint64(TxPoolGlobalSlotsFlag.Name)
	}
	if ctx.GlobalIsSet(TxPoolAccountQueueFlag.Name) {
		cfg.AccountQueue = ctx.GlobalUint64(TxPoolAccountQueueFlag.Name)
	}
	if ctx.GlobalIsSet(TxPoolGlobalQueueFlag.Name) {
		cfg.GlobalQueue = ctx.GlobalUint64(TxPoolGlobalQueueFlag.Name)
	}
	if ctx.GlobalIsSet(TxPoolLifetimeFlag.Name) {
		cfg.Lifetime = ctx.GlobalDuration(TxPoolLifetimeFlag.Name)
	}
}

func setEthdb(ctx *cli.Context, cfg *ethdb.Config) {
	if ctx.GlobalIsSet(EthdbEndpointFlag.Name) {
		cfg.Endpoint = ctx.GlobalString(EthdbEndpointFlag.Name)
	}
	if ctx.GlobalIsSet(EthdbBucketFlag.Name) {
		cfg.Bucket = ctx.GlobalString(EthdbBucketFlag.Name)
	}
	if ctx.GlobalIsSet(EthdbAccessKeyIDFlag.Name) {
		cfg.AccessKeyID = ctx.GlobalString(EthdbAccessKeyIDFlag.Name)
	}
	if ctx.GlobalIsSet(EthdbSecretAccessKeyFlag.Name) {
		cfg.SecretAccessKey = ctx.GlobalString(EthdbSecretAccessKeyFlag.Name)
	}
	if ctx.GlobalIsSet(EthdbMaxOpenSegmentCountFlag.Name) {
		cfg.MaxOpenSegmentCount = ctx.GlobalInt(EthdbMaxOpenSegmentCountFlag.Name)
	}
}

// CheckExclusive verifies that only a single instance of the provided flags was
// set by the user. Each flag might optionally be followed by a string type to
// specialize it further.
func CheckExclusive(ctx *cli.Context, args ...interface{}) {
	set := make([]string, 0, 1)
	for i := 0; i < len(args); i++ {
		// Make sure the next argument is a flag and skip if not set
		flag, ok := args[i].(cli.Flag)
		if !ok {
			panic(fmt.Sprintf("invalid argument, not cli.Flag type: %T", args[i]))
		}
		// Check if next arg extends current and expand its name if so
		name := flag.GetName()

		if i+1 < len(args) {
			switch option := args[i+1].(type) {
			case string:
				// Extended flag check, make sure value set doesn't conflict with passed in option
				if ctx.GlobalString(flag.GetName()) == option {
					name += "=" + option
					set = append(set, "--"+name)
				}
				// shift arguments and continue
				i++
				continue

			case cli.Flag:
			default:
				panic(fmt.Sprintf("invalid argument, not cli.Flag or string extension: %T", args[i+1]))
			}
		}
		// Mark the flag if it's set
		if ctx.GlobalIsSet(flag.GetName()) {
			set = append(set, "--"+name)
		}
	}
	if len(set) > 1 {
		Fatalf("Flags %v can't be used at the same time", strings.Join(set, ", "))
	}
}

// SetShhConfig applies shh-related command line flags to the config.
func SetShhConfig(ctx *cli.Context, stack *node.Node, cfg *whisper.Config) {
	if ctx.GlobalIsSet(WhisperMaxMessageSizeFlag.Name) {
		cfg.MaxMessageSize = uint32(ctx.GlobalUint(WhisperMaxMessageSizeFlag.Name))
	}
	if ctx.GlobalIsSet(WhisperMinPOWFlag.Name) {
		cfg.MinimumAcceptedPOW = ctx.GlobalFloat64(WhisperMinPOWFlag.Name)
	}
}

// SetEthConfig applies eth-related command line flags to the config.
func SetEthConfig(ctx *cli.Context, stack *node.Node, cfg *eth.Config) {
	// Avoid conflicting network flags
	CheckExclusive(ctx, DeveloperFlag, TestnetFlag, LocalFlag)
	CheckExclusive(ctx, FastSyncFlag, LightModeFlag, SyncModeFlag)
	CheckExclusive(ctx, LightServFlag, LightModeFlag)
	CheckExclusive(ctx, LightServFlag, SyncModeFlag, "light")

	ks := stack.AccountManager().Backends(keystore.KeyStoreType)[0].(*keystore.KeyStore)
	setEtherbase(ctx, ks, cfg)
	setGPO(ctx, &cfg.GPO)
	setTxPool(ctx, &cfg.TxPool)

	switch {
	case ctx.GlobalIsSet(SyncModeFlag.Name):
		cfg.SyncMode = *GlobalTextMarshaler(ctx, SyncModeFlag.Name).(*downloader.SyncMode)
	case ctx.GlobalBool(FastSyncFlag.Name):
		cfg.SyncMode = downloader.FastSync
	case ctx.GlobalBool(LightModeFlag.Name):
		cfg.SyncMode = downloader.LightSync
	}
	if ctx.GlobalIsSet(LightServFlag.Name) {
		cfg.LightServ = ctx.GlobalInt(LightServFlag.Name)
	}
	if ctx.GlobalIsSet(LightPeersFlag.Name) {
		cfg.LightPeers = ctx.GlobalInt(LightPeersFlag.Name)
	}
	if ctx.GlobalIsSet(NetworkIdFlag.Name) {
		cfg.NetworkId = ctx.GlobalUint64(NetworkIdFlag.Name)
	}

	if ctx.GlobalIsSet(CacheFlag.Name) || ctx.GlobalIsSet(CacheDatabaseFlag.Name) {
		cfg.DatabaseCache = ctx.GlobalInt(CacheFlag.Name) * ctx.GlobalInt(CacheDatabaseFlag.Name) / 100
	}
	cfg.DatabaseHandles = makeDatabaseHandles()

	if gcmode := ctx.GlobalString(GCModeFlag.Name); gcmode != "full" && gcmode != "archive" {
		Fatalf("--%s must be either 'full' or 'archive'", GCModeFlag.Name)
	}
	cfg.NoPruning = ctx.GlobalString(GCModeFlag.Name) == "archive"

	if ctx.GlobalIsSet(CacheFlag.Name) || ctx.GlobalIsSet(CacheGCFlag.Name) {
		cfg.TrieCache = ctx.GlobalInt(CacheFlag.Name) * ctx.GlobalInt(CacheGCFlag.Name) / 100
	}
	if ctx.GlobalIsSet(MinerNotifyFlag.Name) {
		cfg.MinerNotify = strings.Split(ctx.GlobalString(MinerNotifyFlag.Name), ",")
	}
	if ctx.GlobalIsSet(DocRootFlag.Name) {
		cfg.DocRoot = ctx.GlobalString(DocRootFlag.Name)
	}
	if ctx.GlobalIsSet(MinerLegacyExtraDataFlag.Name) {
		cfg.MinerExtraData = []byte(ctx.GlobalString(MinerLegacyExtraDataFlag.Name))
	}
	if ctx.GlobalIsSet(MinerExtraDataFlag.Name) {
		cfg.MinerExtraData = []byte(ctx.GlobalString(MinerExtraDataFlag.Name))
	}
	if ctx.GlobalIsSet(MinerLegacyGasTargetFlag.Name) {
		cfg.MinerGasFloor = ctx.GlobalUint64(MinerLegacyGasTargetFlag.Name)
	}
	if ctx.GlobalIsSet(MinerGasTargetFlag.Name) {
		cfg.MinerGasFloor = ctx.GlobalUint64(MinerGasTargetFlag.Name)
	}
	if ctx.GlobalIsSet(MinerGasLimitFlag.Name) {
		cfg.MinerGasCeil = ctx.GlobalUint64(MinerGasLimitFlag.Name)
	}
	if ctx.GlobalIsSet(MinerLegacyGasPriceFlag.Name) {
		cfg.MinerGasPrice = GlobalBig(ctx, MinerLegacyGasPriceFlag.Name)
	}
	if ctx.GlobalIsSet(MinerGasPriceFlag.Name) {
		cfg.MinerGasPrice = GlobalBig(ctx, MinerGasPriceFlag.Name)
	}
	if ctx.GlobalIsSet(MinerRecommitIntervalFlag.Name) {
		cfg.MinerRecommit = ctx.Duration(MinerRecommitIntervalFlag.Name)
	}
	if ctx.GlobalIsSet(MinerNoVerfiyFlag.Name) {
		cfg.MinerNoverify = ctx.Bool(MinerNoVerfiyFlag.Name)
	}
	if ctx.GlobalIsSet(VMEnableDebugFlag.Name) {
		// TODO(fjl): force-enable this in --dev mode
		cfg.EnablePreimageRecording = ctx.GlobalBool(VMEnableDebugFlag.Name)
	}

	// Override any default configs for hard coded networks.
	switch {
	case ctx.GlobalBool(TestnetFlag.Name):
		if !ctx.GlobalIsSet(NetworkIdFlag.Name) {
			cfg.NetworkId = params.TestnetChainID
		}
		cfg.Genesis = core.DefaultTestnetGenesisBlock()
	case ctx.GlobalBool(DeveloperFlag.Name):
		if ctx.GlobalIsSet(NetworkIdFlag.Name) {
			Fatalf("%q cannot be used with %q", NetworkIdFlag.Name, DeveloperFlag.Name)
		}
		// Create new developer account or reuse existing one
		var (
			developer accounts.Account
			err       error
		)
		if accs := ks.Accounts(); len(accs) > 0 {
			developer = ks.Accounts()[0]
		} else {
			developer, err = ks.NewAccount("")
			if err != nil {
				Fatalf("Failed to create developer account: %v", err)
			}
		}
		if err := ks.Unlock(developer, ""); err != nil {
			Fatalf("Failed to unlock developer account: %v", err)
		}

		log.Info("Using developer account", "address", developer.Address)

		cfg.Genesis = core.DeveloperGenesisBlock(uint64(ctx.GlobalInt(DeveloperPeriodFlag.Name)), developer.Address)
		cfg.NetworkId = cfg.Genesis.Config.ChainId.Uint64()
		if !ctx.GlobalIsSet(MinerGasPriceFlag.Name) && !ctx.GlobalIsSet(MinerLegacyGasPriceFlag.Name) {
			cfg.MinerGasPrice = big.NewInt(1)
		}
	case ctx.GlobalBool(LocalFlag.Name):
		if ctx.GlobalIsSet(NetworkIdFlag.Name) {
			Fatalf("%q cannot be used with %q", NetworkIdFlag.Name, LocalFlag.Name)
		}
		if GenesisExists(ctx, stack) {
			accs := ks.Accounts()
			if len(accs) == 0 {
				Fatalf("Genesis exists but keystore is empty")
			}
			if err := ks.Unlock(accs[0], ""); err != nil {
				Fatalf("Failed to unlock signer account %q: %v", cfg.Etherbase, err)
			}
			break
		}

		var (
			signer accounts.Account
			err    error
		)
		if accs := ks.Accounts(); len(accs) > 0 {
			signer = ks.Accounts()[0]
		} else {
			signer, err = ks.NewAccount("")
			if err != nil {
				Fatalf("Failed to create signer account: %v", err)
			}
		}
		if err := ks.Unlock(signer, ""); err != nil {
			Fatalf("Failed to unlock signer account: %v", err)
		}
		log.Info("Signing with account", "address", signer.Address)

		oneGO, ok := new(big.Int).SetString("1000000000000000000", 10)
		if !ok {
			panic("failed to parse big.Int string")
		}
		oneThousandGO := new(big.Int).Mul(big.NewInt(1000), oneGO)

		alloc := make(core.GenesisAlloc)
		seedStrs := ctx.GlobalStringSlice(LocalFundFlag.Name)
		if len(seedStrs) > 0 {
			for _, seed := range seedStrs {
				parts := strings.Split(seed, ":")
				if len(parts) > 2 {
					Fatalf("invalid seed format %q: expected <addr> or <addr>:<amount>")
				}

				if !common.IsHexAddress(parts[0]) {
					Fatalf("Failed to parse hex address: %s", parts[0])
				}
				addr := common.HexToAddress(parts[0])

				var amount *big.Int
				if len(parts) == 2 {
					a, ok := new(big.Int).SetString(parts[1], 10)
					if !ok {
						Fatalf("failed to parse seed amount: %s", parts[1])
					}
					amount = a.Mul(a, oneGO)
				} else {
					amount = oneThousandGO
				}

				alloc[addr] = core.GenesisAccount{Balance: amount}
			}
		} else {
			keys := make(map[common.Address]string)
			for i := 0; i < 10; i++ {
				acc, err := crypto.CreateKey()
				if err != nil {
					Fatalf("Failed to create account: %v", err)
				}
				addr := crypto.PubkeyToAddress(acc.PrivateKey().PublicKey)
				alloc[addr] = core.GenesisAccount{Balance: oneThousandGO}
				keys[addr] = acc.PrivateKeyHex()
			}

			var buf bytes.Buffer
			fmt.Fprintln(&buf, "Pre-funded accounts:")
			fmt.Fprintln(&buf)
			fmt.Fprintln(&buf, "\tAddress\t\t\t\t\t\tKey")
			for addr, key := range keys {
				fmt.Fprintf(&buf, "\t%s %s\n", addr.Hex(), key)
			}
			log.Info(buf.String())
		}

		cfg.Genesis = core.LocalGenesisBlock(uint64(ctx.GlobalInt(DeveloperPeriodFlag.Name)), signer.Address, alloc)
		cfg.NetworkId = cfg.Genesis.Config.ChainId.Uint64()
		if !ctx.GlobalIsSet(MinerGasPriceFlag.Name) && !ctx.GlobalIsSet(MinerLegacyGasPriceFlag.Name) {
			cfg.MinerGasPrice = big.NewInt(1)
		}
	}
	// TODO(fjl): move trie cache generations into config
	if gen := ctx.GlobalInt(TrieCacheGenFlag.Name); gen > 0 {
		state.MaxTrieCacheGen = uint16(gen)
	}
}

func GenesisExists(ctx *cli.Context, stack *node.Node) bool {
	db := MakeChainDatabase(ctx, stack)
	defer db.Close()
	stored := rawdb.ReadCanonicalHash(db, 0)
	return stored != common.Hash{}
}

// RegisterEthService adds an GoChain client to the stack.
func RegisterEthService(ctx context.Context, stack *node.Node, cfg *eth.Config) {
	var err error
	if cfg.SyncMode == downloader.LightSync {
		err = stack.Register(func(sctx *node.ServiceContext) (node.Service, error) {
			return les.New(ctx, sctx, cfg)
		})
	} else {
		err = stack.Register(func(sctx *node.ServiceContext) (node.Service, error) {
			fullNode, err := eth.New(sctx, cfg)
			if fullNode != nil && cfg.LightServ > 0 {
				ls, _ := les.NewLesServer(fullNode, cfg)
				fullNode.AddLesServer(ls)
			}
			return fullNode, err
		})
	}
	if err != nil {
		Fatalf("Failed to register the GoChain service: %v", err)
	}
}

// RegisterShhService configures Whisper and adds it to the given node.
func RegisterShhService(stack *node.Node, cfg *whisper.Config) {
	if err := stack.Register(func(n *node.ServiceContext) (node.Service, error) {
		return whisper.New(cfg), nil
	}); err != nil {
		Fatalf("Failed to register the Whisper service: %v", err)
	}
}

// RegisterNetStatsService configures the GoChain Stats daemon and adds it to
// the given node.
func RegisterNetStatsService(stack *node.Node, cfg netstats.Config) {
	if err := stack.Register(func(ctx *node.ServiceContext) (node.Service, error) {
		// Retrieve both eth and les services
		var ethServ *eth.GoChain
		ctx.Service(&ethServ)

		var lesServ *les.LightGoChain
		ctx.Service(&lesServ)

		return netstats.New(cfg, ethServ, lesServ), nil
	}); err != nil {
		Fatalf("Failed to register the GoChain Stats service: %v", err)
	}
}

// MakeChainDatabase open an LevelDB using the flags passed to the client and will hard crash if it fails.
func MakeChainDatabase(ctx *cli.Context, stack *node.Node) common.Database {
	var (
		cache   = ctx.GlobalInt(CacheFlag.Name) * ctx.GlobalInt(CacheDatabaseFlag.Name) / 100
		handles = makeDatabaseHandles()
	)
	name := "chaindata"
	if ctx.GlobalBool(LightModeFlag.Name) {
		name = "lightchaindata"
	}
	chainDb, err := stack.OpenDatabase(name, cache, handles)
	if err != nil {
		Fatalf("Could not open database: %v", err)
	}
	return chainDb
}

func MakeGenesis(ctx *cli.Context) *core.Genesis {
	var genesis *core.Genesis
	switch {
	case ctx.GlobalBool(TestnetFlag.Name):
		genesis = core.DefaultTestnetGenesisBlock()
	case ctx.GlobalBool(DeveloperFlag.Name):
		Fatalf("Developer chains are ephemeral")
	case ctx.GlobalBool(LocalFlag.Name):
		Fatalf("Local chains not supported")
	default:
		genesis = core.DefaultGenesisBlock()
	}
	return genesis
}

// MakeChain creates a chain manager from set command line flags.
func MakeChain(ctx *cli.Context, stack *node.Node) (chain *core.BlockChain, chainDb common.Database) {
	var err error
	chainDb = MakeChainDatabase(ctx, stack)

	config, _, err := core.SetupGenesisBlock(chainDb, MakeGenesis(ctx))
	if err != nil {
		Fatalf("%v", err)
	}
	var engine consensus.Engine
	if config.Clique != nil {
		engine = clique.New(config.Clique, chainDb)
	} else {
		panic(fmt.Errorf("illegal config, nil clique: %s", config))
	}
	if gcmode := ctx.GlobalString(GCModeFlag.Name); gcmode != "full" && gcmode != "archive" {
		Fatalf("--%s must be either 'full' or 'archive'", GCModeFlag.Name)
	}
	cache := &core.CacheConfig{
		Disabled:      ctx.GlobalString(GCModeFlag.Name) == "archive",
		TrieNodeLimit: eth.DefaultConfig.TrieCache,
		TrieTimeLimit: eth.DefaultConfig.TrieTimeout,
	}
	if ctx.GlobalIsSet(CacheFlag.Name) || ctx.GlobalIsSet(CacheGCFlag.Name) {
		cache.TrieNodeLimit = ctx.GlobalInt(CacheFlag.Name) * ctx.GlobalInt(CacheGCFlag.Name) / 100
	}
	vmcfg := vm.Config{EnablePreimageRecording: ctx.GlobalBool(VMEnableDebugFlag.Name)}
	chain, err = core.NewBlockChain(chainDb, cache, config, engine, vmcfg)
	if err != nil {
		Fatalf("Can't create BlockChain: %v", err)
	}
	return chain, chainDb
}

// MakeConsolePreloads retrieves the absolute paths for the console JavaScript
// scripts to preload before starting.
func MakeConsolePreloads(ctx *cli.Context) []string {
	// Skip preloading if there's nothing to preload
	if ctx.GlobalString(PreloadJSFlag.Name) == "" {
		return nil
	}
	// Otherwise resolve absolute paths and return them
	preloads := []string{}

	assets := ctx.GlobalString(JSpathFlag.Name)
	for _, file := range strings.Split(ctx.GlobalString(PreloadJSFlag.Name), ",") {
		preloads = append(preloads, common.AbsolutePath(assets, strings.TrimSpace(file)))
	}
	return preloads
}

// MigrateFlags sets the global flag from a local flag when it's set.
// This is a temporary function used for migrating old command/flags to the
// new format.
//
// e.g. geth account new --keystore /tmp/mykeystore --lightkdf
//
// is equivalent after calling this method with:
//
// geth --keystore /tmp/mykeystore --lightkdf account new
//
// This allows the use of the existing configuration functionality.
// When all flags are migrated this function can be removed and the existing
// configuration functionality must be changed that is uses local flags
func MigrateFlags(action func(ctx *cli.Context) error) func(*cli.Context) error {
	return func(ctx *cli.Context) error {
		for _, name := range ctx.FlagNames() {
			if ctx.IsSet(name) {
				ctx.GlobalSet(name, ctx.String(name))
			}
		}
		return action(ctx)
	}
}