github.com/linapex/ethereum-dpos-chinese@v0.0.0-20190316121959-b78b3a4a1ece/cmd/utils/flags.go

//<developer>
//    <name>linapex 曹一峰</name>
//    <email>linapex@163.com</email>
//    <wx>superexc</wx>
//    <qqgroup>128148617</qqgroup>
//    <url>https://jsq.ink</url>
//    <role>pku engineer</role>
//    <date>2019-03-16 12:09:32</date>
//</624342607064993792>


//package utils包含用于go-ethereum命令的内部助手函数。
package utils

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

	"github.com/ethereum/go-ethereum/accounts"
	"github.com/ethereum/go-ethereum/accounts/keystore"
	"github.com/ethereum/go-ethereum/common"
	"github.com/ethereum/go-ethereum/common/fdlimit"
//“github.com/ethereum/go-ethereum/consension”网站
//“github.com/ethereum/go-ethereum/consension/clique”
//“github.com/ethereum/go-ethereum/consultance/ethash”
	"github.com/ethereum/go-ethereum/consensus/dpos"
	"github.com/ethereum/go-ethereum/core"
	"github.com/ethereum/go-ethereum/core/state"
	"github.com/ethereum/go-ethereum/core/vm"
	"github.com/ethereum/go-ethereum/crypto"
	"github.com/ethereum/go-ethereum/dashboard"
	"github.com/ethereum/go-ethereum/eth"
	"github.com/ethereum/go-ethereum/eth/downloader"
	"github.com/ethereum/go-ethereum/eth/gasprice"
	"github.com/ethereum/go-ethereum/ethdb"
	"github.com/ethereum/go-ethereum/ethstats"
	"github.com/ethereum/go-ethereum/les"
	"github.com/ethereum/go-ethereum/log"
	"github.com/ethereum/go-ethereum/metrics"
	"github.com/ethereum/go-ethereum/metrics/influxdb"
	"github.com/ethereum/go-ethereum/node"
	"github.com/ethereum/go-ethereum/p2p"
	"github.com/ethereum/go-ethereum/p2p/discover"
	"github.com/ethereum/go-ethereum/p2p/discv5"
	"github.com/ethereum/go-ethereum/p2p/nat"
	"github.com/ethereum/go-ethereum/p2p/netutil"
	"github.com/ethereum/go-ethereum/params"
	whisper "github.com/ethereum/go-ethereum/whisper/whisperv6"
	"gopkg.in/urfave/cli.v1"
)



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创建具有健全默认值的应用程序。
func NewApp(gitCommit, usage string) *cli.App {
	app := cli.NewApp()
	app.Name = filepath.Base(os.Args[0])
	app.Author = ""
//
	app.Email = ""
	app.Version = params.VersionWithMeta
	if len(gitCommit) >= 8 {
		app.Version += "-" + gitCommit[:8]
	}
	app.Usage = usage
	return app
}

//这些都是我们支持的命令行标志。
//
//在适当的命令定义中标记。
//
//
//所有命令都相同。

var (
//常规设置
	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, 1=Frontier, 2=Morden (disused), 3=Ropsten, 4=Rinkeby)",
		Value: eth.DefaultConfig.NetworkId,
	}
	TestnetFlag = cli.BoolFlag{
		Name:  "testnet",
		Usage: "Ropsten network: pre-configured proof-of-work test network",
	}
	RinkebyFlag = cli.BoolFlag{
		Name:  "rinkeby",
		Usage: "Rinkeby network: pre-configured proof-of-authority test network",
	}
	DeveloperFlag = cli.BoolFlag{
		Name:  "dev",
		Usage: "Ephemeral proof-of-authority network with a pre-funded developer account, mining enabled",
	}
	DeveloperPeriodFlag = cli.IntFlag{
		Name:  "dev.period",
		Usage: "Block period to use in developer mode (0 = mine only if transaction pending)",
	}
	IdentityFlag = cli.StringFlag{
		Name:  "identity",
		Usage: "Custom node name",
	}
	DocRootFlag = DirectoryFlag{
		Name:  "docroot",
		Usage: "Document Root for HTTPClient file scheme",
		Value: DirectoryString{homeDir()},
	}
	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",
	}
//仪表板设置
	DashboardEnabledFlag = cli.BoolFlag{
		Name:  metrics.DashboardEnabledFlag,
		Usage: "Enable the dashboard",
	}
	DashboardAddrFlag = cli.StringFlag{
		Name:  "dashboard.addr",
		Usage: "Dashboard listening interface",
		Value: dashboard.DefaultConfig.Host,
	}
	DashboardPortFlag = cli.IntFlag{
		Name:  "dashboard.host",
		Usage: "Dashboard listening port",
		Value: dashboard.DefaultConfig.Port,
	}
	DashboardRefreshFlag = cli.DurationFlag{
		Name:  "dashboard.refresh",
		Usage: "Dashboard metrics collection refresh rate",
		Value: dashboard.DefaultConfig.Refresh,
	}
//乙烯利设置
	EthashCacheDirFlag = DirectoryFlag{
		Name:  "ethash.cachedir",
		Usage: "Directory to store the ethash verification caches (default = inside the datadir)",
	}
	EthashCachesInMemoryFlag = cli.IntFlag{
		Name:  "ethash.cachesinmem",
		Usage: "Number of recent ethash caches to keep in memory (16MB each)",
		Value: eth.DefaultConfig.Ethash.CachesInMem,
	}
	EthashCachesOnDiskFlag = cli.IntFlag{
		Name:  "ethash.cachesondisk",
		Usage: "Number of recent ethash caches to keep on disk (16MB each)",
		Value: eth.DefaultConfig.Ethash.CachesOnDisk,
	}
	EthashDatasetDirFlag = DirectoryFlag{
		Name:  "ethash.dagdir",
		Usage: "Directory to store the ethash mining DAGs (default = inside home folder)",
		Value: DirectoryString{eth.DefaultConfig.Ethash.DatasetDir},
	}
	EthashDatasetsInMemoryFlag = cli.IntFlag{
		Name:  "ethash.dagsinmem",
		Usage: "Number of recent ethash mining DAGs to keep in memory (1+GB each)",
		Value: eth.DefaultConfig.Ethash.DatasetsInMem,
	}
	EthashDatasetsOnDiskFlag = cli.IntFlag{
		Name:  "ethash.dagsondisk",
		Usage: "Number of recent ethash mining DAGs to keep on disk (1+GB each)",
		Value: eth.DefaultConfig.Ethash.DatasetsOnDisk,
	}
//
	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,
	}
//性能调整设置
	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),
	}
//矿工设置
	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: params.GenesisGasLimit,
	}
	MinerLegacyGasTargetFlag = cli.Uint64Flag{
		Name:  "targetgaslimit",
		Usage: "Target gas floor for mined blocks (deprecated, use --miner.gastarget)",
		Value: params.GenesisGasLimit,
	}
	MinerGasPriceFlag = BigFlag{
		Name:  "miner.gasprice",
		Usage: "Minimal gas price for mining a transactions",
		Value: eth.DefaultConfig.MinerGasPrice,
	}
	MinerLegacyGasPriceFlag = BigFlag{
		Name:  "gasprice",
		Usage: "Minimal gas price for mining a transactions (deprecated, use --miner.gasprice)",
		Value: eth.DefaultConfig.MinerGasPrice,
	}
	ValidatorFlag = cli.StringFlag{
		Name:  "validator",
		Usage: "Public address for block mining signer (default = first account created)",
		Value: "0",
	}
	CoinbaseFlag = cli.StringFlag{
		Name:  "coinbase",
		Usage: "Public address for block mining rewards (default = first account created)",
		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,
	}
//帐户设置
	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",
	}
//日志记录和调试设置
	EthStatsURLFlag = cli.StringFlag{
		Name:  "ethstats",
		Usage: "Reporting URL of a ethstats service (nodename:secret@host:port)",
	}
	FakePoWFlag = cli.BoolFlag{
		Name:  "fakepow",
		Usage: "Disables proof-of-work verification",
	}
	NoCompactionFlag = cli.BoolFlag{
		Name:  "nocompaction",
		Usage: "Disables db compaction after import",
	}
//RPC设置
	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 '*' wildcard.",
		Value: strings.Join(node.DefaultConfig.HTTPVirtualHosts, ","),
	}
	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",
	}

//网络设置
	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)",
	}

//将URL留给用户并部署到的ATM
	JSpathFlag = cli.StringFlag{
		Name:  "jspath",
		Usage: "JavaScript root path for `loadScript`",
		Value: ".",
	}

//天然气价格Oracle设置
	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,
	}
	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,
	}

//度量标志
	MetricsEnabledFlag = cli.BoolFlag{
		Name:  metrics.MetricsEnabledFlag,
		Usage: "Enable metrics collection and reporting",
	}
	MetricsEnableInfluxDBFlag = cli.BoolFlag{
		Name:  "metrics.influxdb",
		Usage: "Enable metrics export/push to an external InfluxDB database",
	}
	MetricsInfluxDBEndpointFlag = cli.StringFlag{
		Name:  "metrics.influxdb.endpoint",
		Usage: "InfluxDB API endpoint to report metrics to",
Value: "http://本地主机：8086“，
	}
	MetricsInfluxDBDatabaseFlag = cli.StringFlag{
		Name:  "metrics.influxdb.database",
		Usage: "InfluxDB database name to push reported metrics to",
		Value: "geth",
	}
	MetricsInfluxDBUsernameFlag = cli.StringFlag{
		Name:  "metrics.influxdb.username",
		Usage: "Username to authorize access to the database",
		Value: "test",
	}
	MetricsInfluxDBPasswordFlag = cli.StringFlag{
		Name:  "metrics.influxdb.password",
		Usage: "Password to authorize access to the database",
		Value: "test",
	}
//“host”标记是发送到influxdb的每个度量的一部分。在influxdb中，对标签的查询更快。
//它的使用是为了让我们可以对所有节点进行分组，并对所有节点的测量值进行平均，但也同样如此
//我们可以选择一个特定的节点并检查它的测量值。
//https://docs.influxdata.com/influxdb/v1.4/concepts/key_-concepts/标记密钥
	MetricsInfluxDBHostTagFlag = cli.StringFlag{
		Name:  "metrics.influxdb.host.tag",
		Usage: "InfluxDB `host` tag attached to all measurements",
		Value: "localhost",
	}
)

//makedatadir检索当前请求的数据目录，终止
//如果没有指定（或空字符串）。如果节点正在启动一个测试网，
//
func MakeDataDir(ctx *cli.Context) string {
	if path := ctx.GlobalString(DataDirFlag.Name); path != "" {
		if ctx.GlobalBool(TestnetFlag.Name) {
			return filepath.Join(path, "testnet")
		}
		if ctx.GlobalBool(RinkebyFlag.Name) {
			return filepath.Join(path, "rinkeby")
		}
		return path
	}
	Fatalf("Cannot determine default data directory, please set manually (--datadir)")
	return ""
}

//set node key从set命令行标志创建一个节点键，或者加载它
//从文件或作为指定的十六进制值。如果没有提供任何标志，则
//方法返回nil，将生成一个临时键。
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从cli标志创建用户标识符。
func setNodeUserIdent(ctx *cli.Context, cfg *node.Config) {
	if identity := ctx.GlobalString(IdentityFlag.Name); len(identity) > 0 {
		cfg.UserIdent = identity
	}
}

//
//标记，如果未指定，则恢复为预配置的标记。
func setBootstrapNodes(ctx *cli.Context, cfg *p2p.Config) {
	urls := params.MainnetBootnodes
	switch {
	case ctx.GlobalIsSet(BootnodesFlag.Name) || ctx.GlobalIsSet(BootnodesV4Flag.Name):
		if ctx.GlobalIsSet(BootnodesV4Flag.Name) {
			urls = strings.Split(ctx.GlobalString(BootnodesV4Flag.Name), ",")
		} else {
			urls = strings.Split(ctx.GlobalString(BootnodesFlag.Name), ",")
		}
	case ctx.GlobalBool(TestnetFlag.Name):
		urls = params.TestnetBootnodes
	case ctx.GlobalBool(RinkebyFlag.Name):
		urls = params.RinkebyBootnodes
	case cfg.BootstrapNodes != nil:
return //已设置，不应用默认值。
	}

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

//setbootstrapnodesv5从命令行创建引导节点列表
//标记，如果未指定，则恢复为预配置的标记。
func setBootstrapNodesV5(ctx *cli.Context, cfg *p2p.Config) {
	urls := params.DiscoveryV5Bootnodes
	switch {
	case ctx.GlobalIsSet(BootnodesFlag.Name) || ctx.GlobalIsSet(BootnodesV5Flag.Name):
		if ctx.GlobalIsSet(BootnodesV5Flag.Name) {
			urls = strings.Split(ctx.GlobalString(BootnodesV5Flag.Name), ",")
		} else {
			urls = strings.Split(ctx.GlobalString(BootnodesFlag.Name), ",")
		}
	case ctx.GlobalBool(RinkebyFlag.Name):
		urls = params.RinkebyBootnodes
	case cfg.BootstrapNodesV5 != nil:
return //已设置，不应用默认值。
	}

	cfg.BootstrapNodesV5 = make([]*discv5.Node, 0, len(urls))
	for _, url := range urls {
		node, err := discv5.ParseNode(url)
		if err != nil {
			log.Error("Bootstrap URL invalid", "enode", url, "err", err)
			continue
		}
		cfg.BootstrapNodesV5 = append(cfg.BootstrapNodesV5, node)
	}
}

//setlistenaddress从set命令创建TCP侦听地址字符串
//行标志。
func setListenAddress(ctx *cli.Context, cfg *p2p.Config) {
	if ctx.GlobalIsSet(ListenPortFlag.Name) {
		cfg.ListenAddr = fmt.Sprintf(":%d", ctx.GlobalInt(ListenPortFlag.Name))
	}
}

//
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拆分由逗号分隔的输入
//并修剪子字符串中多余的空白。
func splitAndTrim(input string) []string {
	result := strings.Split(input, ",")
	for i, r := range result {
		result[i] = strings.TrimSpace(r)
	}
	return result
}

//set http从集合创建HTTP RPC侦听器接口字符串
//
func setHTTP(ctx *cli.Context, cfg *node.Config) {
	if ctx.GlobalBool(RPCEnabledFlag.Name) && cfg.HTTPHost == "" {
		cfg.HTTPHost = "127.0.0.1"
		if ctx.GlobalIsSet(RPCListenAddrFlag.Name) {
			cfg.HTTPHost = ctx.GlobalString(RPCListenAddrFlag.Name)
		}
	}

	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))
	}
	if ctx.GlobalIsSet(RPCVirtualHostsFlag.Name) {
		cfg.HTTPVirtualHosts = splitAndTrim(ctx.GlobalString(RPCVirtualHostsFlag.Name))
	}
}

//setws从集合创建websocket rpc侦听器接口字符串
//命令行标志，如果禁用HTTP端点，则返回空。
func setWS(ctx *cli.Context, cfg *node.Config) {
	if ctx.GlobalBool(WSEnabledFlag.Name) && cfg.WSHost == "" {
		cfg.WSHost = "127.0.0.1"
		if ctx.GlobalIsSet(WSListenAddrFlag.Name) {
			cfg.WSHost = ctx.GlobalString(WSListenAddrFlag.Name)
		}
	}

	if ctx.GlobalIsSet(WSPortFlag.Name) {
		cfg.WSPort = ctx.GlobalInt(WSPortFlag.Name)
	}
	if ctx.GlobalIsSet(WSAllowedOriginsFlag.Name) {
		cfg.WSOrigins = splitAndTrim(ctx.GlobalString(WSAllowedOriginsFlag.Name))
	}
	if ctx.GlobalIsSet(WSApiFlag.Name) {
		cfg.WSModules = splitAndTrim(ctx.GlobalString(WSApiFlag.Name))
	}
}

//
//如果显式禁用了IPC或设置的路径，则返回空字符串。
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引发每个进程允许的文件句柄数
//并返回要分配给数据库的津贴的一半。
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 { //
		limit = 2048
	}
return limit / 2 //留下一半用于网络和其他东西
}

//makeaddress转换直接指定为十六进制编码字符串或
//内部帐户表示形式的密钥存储中的密钥索引。
func MakeAddress(ks *keystore.KeyStore, account string) (accounts.Account, error) {
//如果指定的帐户是有效地址，请将其返回
	if common.IsHexAddress(account) {
		return accounts.Account{Address: common.HexToAddress(account)}, nil
	}
//否则，尝试将帐户解释为密钥存储索引
	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
}

//setvalidator从直接指定的
//命令行标志或来自keystore（如果为cli编制了索引）。
func setValidator(ctx *cli.Context, ks *keystore.KeyStore, cfg *eth.Config) {
	if ctx.GlobalIsSet(ValidatorFlag.Name) {
		account, err := MakeAddress(ks, ctx.GlobalString(ValidatorFlag.Name))
		if err != nil {
			Fatalf("Option %q: %v", ValidatorFlag.Name, err)
		}
		cfg.Validator = account.Address
		return
	}
	accounts := ks.Accounts()
	if (cfg.Validator == common.Address{}) {
		if len(accounts) > 0 {
			cfg.Validator = accounts[0].Address
		} else {
			log.Warn("No validator set and no accounts found as default")
		}
	}
}

//setCoinBase从直接指定的
//命令行标志或来自keystore（如果为cli编制了索引）。
func setCoinbase(ctx *cli.Context, ks *keystore.KeyStore, cfg *eth.Config) {
	if ctx.GlobalIsSet(CoinbaseFlag.Name) {
		account, err := MakeAddress(ks, ctx.GlobalString(CoinbaseFlag.Name))
		if err != nil {
			Fatalf("Option %q: %v", CoinbaseFlag.Name, err)
		}
		cfg.Coinbase = account.Address
		return
	}
	accounts := ks.Accounts()
	if (cfg.Coinbase == common.Address{}) {
		if len(accounts) > 0 {
			cfg.Coinbase = accounts[0].Address
		} else {
			log.Warn("No coinbase set and no accounts found as default")
		}
	}
}

//makepasswordlist从global--password标志指定的文件中读取密码行。
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")
//对DOS行结尾进行消毒。
	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)
	setBootstrapNodesV5(ctx, cfg)

	lightClient := 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)
		if lightServer && !ctx.GlobalIsSet(LightPeersFlag.Name) {
			cfg.MaxPeers += lightPeers
		}
	} 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
	}

//
//除非使用--nodiscover显式禁用它，否则请注意显式指定
//--v5disc overrides--nodiscover，在这种情况下，后者只禁用v4发现
	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) {
//--dev模式不能使用p2p网络。
		cfg.MaxPeers = 0
		cfg.ListenAddr = ":0"
		cfg.NoDiscovery = true
		cfg.DiscoveryV5 = false
	}
}

//setnodeconfig将与节点相关的命令行标志应用于配置。
func SetNodeConfig(ctx *cli.Context, cfg *node.Config) {
	SetP2PConfig(ctx, &cfg.P2P)
	setIPC(ctx, cfg)
	setHTTP(ctx, cfg)
	setWS(ctx, cfg)
	setNodeUserIdent(ctx, cfg)

	switch {
	case ctx.GlobalIsSet(DataDirFlag.Name):
		cfg.DataDir = ctx.GlobalString(DataDirFlag.Name)
	case ctx.GlobalBool(DeveloperFlag.Name):
cfg.DataDir = "" //除非明确要求，否则使用内存数据库
	case ctx.GlobalBool(TestnetFlag.Name):
		cfg.DataDir = filepath.Join(node.DefaultDataDir(), "testnet")
	case ctx.GlobalBool(RinkebyFlag.Name):
		cfg.DataDir = filepath.Join(node.DefaultDataDir(), "rinkeby")
	}

	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)
	}
}

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 setEthash(ctx *cli.Context, cfg *eth.Config) {
	if ctx.GlobalIsSet(EthashCacheDirFlag.Name) {
		cfg.Ethash.CacheDir = ctx.GlobalString(EthashCacheDirFlag.Name)
	}
	if ctx.GlobalIsSet(EthashDatasetDirFlag.Name) {
		cfg.Ethash.DatasetDir = ctx.GlobalString(EthashDatasetDirFlag.Name)
	}
	if ctx.GlobalIsSet(EthashCachesInMemoryFlag.Name) {
		cfg.Ethash.CachesInMem = ctx.GlobalInt(EthashCachesInMemoryFlag.Name)
	}
	if ctx.GlobalIsSet(EthashCachesOnDiskFlag.Name) {
		cfg.Ethash.CachesOnDisk = ctx.GlobalInt(EthashCachesOnDiskFlag.Name)
	}
	if ctx.GlobalIsSet(EthashDatasetsInMemoryFlag.Name) {
		cfg.Ethash.DatasetsInMem = ctx.GlobalInt(EthashDatasetsInMemoryFlag.Name)
	}
	if ctx.GlobalIsSet(EthashDatasetsOnDiskFlag.Name) {
		cfg.Ethash.DatasetsOnDisk = ctx.GlobalInt(EthashDatasetsOnDiskFlag.Name)
	}
}

//checkExclusive验证提供的标志只有一个实例
//
//进一步专业化。
func checkExclusive(ctx *cli.Context, args ...interface{}) {
	set := make([]string, 0, 1)
	for i := 0; i < len(args); i++ {
//确保下一个参数是标志，如果未设置，则跳过。
		flag, ok := args[i].(cli.Flag)
		if !ok {
			panic(fmt.Sprintf("invalid argument, not cli.Flag type: %T", args[i]))
		}
//检查next参数是否扩展当前参数，如果扩展，则扩展其名称
		name := flag.GetName()

		if i+1 < len(args) {
			switch option := args[i+1].(type) {
			case string:
//扩展标志，扩展名称并移动参数
				if ctx.GlobalString(flag.GetName()) == option {
					name += "=" + option
				}
				i++

			case cli.Flag:
			default:
				panic(fmt.Sprintf("invalid argument, not cli.Flag or string extension: %T", args[i+1]))
			}
		}
//
		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将与shh相关的命令行标志应用于配置。
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将与eth相关的命令行标志应用于配置。
func SetEthConfig(ctx *cli.Context, stack *node.Node, cfg *eth.Config) {
//
	checkExclusive(ctx, DeveloperFlag, TestnetFlag, RinkebyFlag)
	checkExclusive(ctx, LightServFlag, SyncModeFlag, "light")

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

	if ctx.GlobalIsSet(SyncModeFlag.Name) {
		cfg.SyncMode = *GlobalTextMarshaler(ctx, SyncModeFlag.Name).(*downloader.SyncMode)
	}
	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(MinerLegacyThreadsFlag.Name) {
		cfg.MinerThreads = ctx.GlobalInt(MinerLegacyThreadsFlag.Name)
	}
	if ctx.GlobalIsSet(MinerThreadsFlag.Name) {
		cfg.MinerThreads = ctx.GlobalInt(MinerThreadsFlag.Name)
	}
	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(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(VMEnableDebugFlag.Name) {
//TODO（FJL）：强制启用--dev模式
		cfg.EnablePreimageRecording = ctx.GlobalBool(VMEnableDebugFlag.Name)
	}

//覆盖硬编码网络的任何默认配置。
	switch {
	case ctx.GlobalBool(TestnetFlag.Name):
		if !ctx.GlobalIsSet(NetworkIdFlag.Name) {
			cfg.NetworkId = 3
		}
		cfg.Genesis = core.DefaultTestnetGenesisBlock()
	case ctx.GlobalBool(RinkebyFlag.Name):
		if !ctx.GlobalIsSet(NetworkIdFlag.Name) {
			cfg.NetworkId = 4
		}
		cfg.Genesis = core.DefaultRinkebyGenesisBlock()
	case ctx.GlobalBool(DeveloperFlag.Name):
		if !ctx.GlobalIsSet(NetworkIdFlag.Name) {
			cfg.NetworkId = 1337
		}
//创建新的开发人员帐户或重用现有帐户
		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)
		if !ctx.GlobalIsSet(MinerGasPriceFlag.Name) && !ctx.GlobalIsSet(MinerLegacyGasPriceFlag.Name) {
			cfg.MinerGasPrice = big.NewInt(1)
		}
	}
//TODO（FJL）：将trie缓存生成移动到配置中
	if gen := ctx.GlobalInt(TrieCacheGenFlag.Name); gen > 0 {
		state.MaxTrieCacheGen = uint16(gen)
	}
}

//setdashboardconfig将与仪表板相关的命令行标志应用于配置。
func SetDashboardConfig(ctx *cli.Context, cfg *dashboard.Config) {
	cfg.Host = ctx.GlobalString(DashboardAddrFlag.Name)
	cfg.Port = ctx.GlobalInt(DashboardPortFlag.Name)
	cfg.Refresh = ctx.GlobalDuration(DashboardRefreshFlag.Name)
}

//registerethservice将以太坊客户端添加到堆栈中。
func RegisterEthService(stack *node.Node, cfg *eth.Config) {
	var err error
	if cfg.SyncMode == downloader.LightSync {
		err = stack.Register(func(ctx *node.ServiceContext) (node.Service, error) {
			return les.New(ctx, cfg)
		})
	} else {
		err = stack.Register(func(ctx *node.ServiceContext) (node.Service, error) {
			fullNode, err := eth.New(ctx, 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 Ethereum service: %v", err)
	}
}

//RegisterDashboardService将仪表板添加到堆栈中。
func RegisterDashboardService(stack *node.Node, cfg *dashboard.Config, commit string) {
	stack.Register(func(ctx *node.ServiceContext) (node.Service, error) {
		return dashboard.New(cfg, commit, ctx.ResolvePath("logs")), nil
	})
}

//registershhservice配置whisper并将其添加到给定节点。
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)
	}
}

//
//给定节点。
func RegisterEthStatsService(stack *node.Node, url string) {
	if err := stack.Register(func(ctx *node.ServiceContext) (node.Service, error) {
//检索ETH和LES服务
		var ethServ *eth.Ethereum
		ctx.Service(&ethServ)

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

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

//SetupNetwork为主网络或某些测试网络配置系统。
func SetupNetwork(ctx *cli.Context) {
//TODO（FJL）：将目标气体限制移动到配置中
	params.TargetGasLimit = ctx.GlobalUint64(MinerLegacyGasTargetFlag.Name)
	if ctx.GlobalIsSet(MinerGasTargetFlag.Name) {
		params.TargetGasLimit = ctx.GlobalUint64(MinerGasTargetFlag.Name)
	}
}

func SetupMetrics(ctx *cli.Context) {
	if metrics.Enabled {
		log.Info("Enabling metrics collection")
		var (
			enableExport = ctx.GlobalBool(MetricsEnableInfluxDBFlag.Name)
			endpoint     = ctx.GlobalString(MetricsInfluxDBEndpointFlag.Name)
			database     = ctx.GlobalString(MetricsInfluxDBDatabaseFlag.Name)
			username     = ctx.GlobalString(MetricsInfluxDBUsernameFlag.Name)
			password     = ctx.GlobalString(MetricsInfluxDBPasswordFlag.Name)
			hosttag      = ctx.GlobalString(MetricsInfluxDBHostTagFlag.Name)
		)

		if enableExport {
			log.Info("Enabling metrics export to InfluxDB")
			go influxdb.InfluxDBWithTags(metrics.DefaultRegistry, 10*time.Second, endpoint, database, username, password, "geth.", map[string]string{
				"host": hosttag,
			})
		}
	}
}

//makechaindatabase使用传递给客户机的标志打开一个leveldb，如果失败，它将很难崩溃。
func MakeChainDatabase(ctx *cli.Context, stack *node.Node) ethdb.Database {
	var (
		cache   = ctx.GlobalInt(CacheFlag.Name) * ctx.GlobalInt(CacheDatabaseFlag.Name) / 100
		handles = makeDatabaseHandles()
	)
	name := "chaindata"
	if ctx.GlobalString(SyncModeFlag.Name) == "light" {
		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(RinkebyFlag.Name):
		genesis = core.DefaultRinkebyGenesisBlock()
	case ctx.GlobalBool(DeveloperFlag.Name):
		Fatalf("Developer chains are ephemeral")
	}
	return genesis
}

//
func MakeChain(ctx *cli.Context, stack *node.Node) (chain *core.BlockChain, chainDb ethdb.Database) {
	var err error
	chainDb = MakeChainDatabase(ctx, stack)

	config, _, err := core.SetupGenesisBlock(chainDb, nil)
	if err != nil {
		Fatalf("%v", err)
	}
	engine := dpos.New(config.Dpos, chainDb)
	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检索控制台javascript的绝对路径
//启动前要预加载的脚本。
func MakeConsolePreloads(ctx *cli.Context) []string {
//如果没有要预加载的内容，则跳过预加载
	if ctx.GlobalString(PreloadJSFlag.Name) == "" {
		return nil
	}
//否则，解析绝对路径并返回它们
	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在设置本地标志时从该标志设置全局标志。
//这是一个临时函数，用于将旧命令/标志迁移到
//新格式。
//
//例如，geth account new--keystore/tmp/mykeystore--lightkdf
//
//在用以下方法调用此方法后等效：
//
//geth--keystore/tmp/mykeystore--lightkdf新帐户
//
//这允许使用现有的配置功能。
//当迁移所有标志时，可以删除此函数，并且
//必须更改使用本地标志的配置功能
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)
	}
}