aboutsummaryrefslogtreecommitdiffstats
path: root/cmd/utils/flags.go
blob: 28c692689e591daa9586d909dd467b25f0da9c3f (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
// 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

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

    "github.com/codegangsta/cli"
    "github.com/ethereum/ethash"
    "github.com/ethereum/go-ethereum/accounts"
    "github.com/ethereum/go-ethereum/common"
    "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/eth"
    "github.com/ethereum/go-ethereum/ethdb"
    "github.com/ethereum/go-ethereum/event"
    "github.com/ethereum/go-ethereum/logger"
    "github.com/ethereum/go-ethereum/logger/glog"
    "github.com/ethereum/go-ethereum/metrics"
    "github.com/ethereum/go-ethereum/node"
    "github.com/ethereum/go-ethereum/p2p/discover"
    "github.com/ethereum/go-ethereum/p2p/nat"
    "github.com/ethereum/go-ethereum/params"
    "github.com/ethereum/go-ethereum/rpc"
    "github.com/ethereum/go-ethereum/whisper"
)

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

VERSION:
   {{.Version}}

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

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

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

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

var (
    // General settings
    DataDirFlag = DirectoryFlag{
        Name:  "datadir",
        Usage: "Data directory for the databases and keystore",
        Value: DirectoryString{common.DefaultDataDir()},
    }
    NetworkIdFlag = cli.IntFlag{
        Name:  "networkid",
        Usage: "Network identifier (integer, 0=Olympic, 1=Frontier, 2=Morden)",
        Value: eth.NetworkId,
    }
    OlympicFlag = cli.BoolFlag{
        Name:  "olympic",
        Usage: "Olympic network: pre-configured pre-release test network",
    }
    TestNetFlag = cli.BoolFlag{
        Name:  "testnet",
        Usage: "Morden network: pre-configured test network with modified starting nonces (replay protection)",
    }
    DevModeFlag = cli.BoolFlag{
        Name:  "dev",
        Usage: "Developer mode: pre-configured private network with several debugging flags",
    }
    GenesisFileFlag = cli.StringFlag{
        Name:  "genesis",
        Usage: "Insert/overwrite the genesis block (JSON format)",
    }
    IdentityFlag = cli.StringFlag{
        Name:  "identity",
        Usage: "Custom node name",
    }
    NatspecEnabledFlag = cli.BoolFlag{
        Name:  "natspec",
        Usage: "Enable NatSpec confirmation notice",
    }
    DocRootFlag = DirectoryFlag{
        Name:  "docroot",
        Usage: "Document Root for HTTPClient file scheme",
        Value: DirectoryString{common.HomeDir()},
    }
    CacheFlag = cli.IntFlag{
        Name:  "cache",
        Usage: "Megabytes of memory allocated to internal caching (min 16MB / database forced)",
        Value: 0,
    }
    BlockchainVersionFlag = cli.IntFlag{
        Name:  "blockchainversion",
        Usage: "Blockchain version (integer)",
        Value: core.BlockChainVersion,
    }
    FastSyncFlag = cli.BoolFlag{
        Name:  "fast",
        Usage: "Enable fast syncing through state downloads",
    }
    LightKDFFlag = cli.BoolFlag{
        Name:  "lightkdf",
        Usage: "Reduce key-derivation RAM & CPU usage at some expense of KDF strength",
    }
    // Miner settings
    // TODO: refactor CPU vs GPU mining flags
    MiningEnabledFlag = cli.BoolFlag{
        Name:  "mine",
        Usage: "Enable mining",
    }
    MinerThreadsFlag = cli.IntFlag{
        Name:  "minerthreads",
        Usage: "Number of CPU threads to use for mining",
        Value: runtime.NumCPU(),
    }
    MiningGPUFlag = cli.StringFlag{
        Name:  "minergpus",
        Usage: "List of GPUs to use for mining (e.g. '0,1' will use the first two GPUs found)",
    }
    AutoDAGFlag = cli.BoolFlag{
        Name:  "autodag",
        Usage: "Enable automatic DAG pregeneration",
    }
    EtherbaseFlag = cli.StringFlag{
        Name:  "etherbase",
        Usage: "Public address for block mining rewards (default = first account created)",
        Value: "0",
    }
    GasPriceFlag = cli.StringFlag{
        Name:  "gasprice",
        Usage: "Minimal gas price to accept for mining a transactions",
        Value: new(big.Int).Mul(big.NewInt(50), common.Shannon).String(),
    }
    ExtraDataFlag = cli.StringFlag{
        Name:  "extradata",
        Usage: "Block extra data set by the miner (default = client version)",
    }
    // 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-inteactive password input",
        Value: "",
    }

    // vm flags
    VMDebugFlag = cli.BoolFlag{
        Name:  "vmdebug",
        Usage: "Virtual Machine debug output",
    }
    VMForceJitFlag = cli.BoolFlag{
        Name:  "forcejit",
        Usage: "Force the JIT VM to take precedence",
    }
    VMJitCacheFlag = cli.IntFlag{
        Name:  "jitcache",
        Usage: "Amount of cached JIT VM programs",
        Value: 64,
    }
    VMEnableJitFlag = cli.BoolFlag{
        Name:  "jitvm",
        Usage: "Enable the JIT VM",
    }

    // logging and debug settings
    MetricsEnabledFlag = cli.BoolFlag{
        Name:  metrics.MetricsEnabledFlag,
        Usage: "Enable metrics collection and reporting",
    }

    // 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: common.DefaultHttpHost,
    }
    RPCPortFlag = cli.IntFlag{
        Name:  "rpcport",
        Usage: "HTTP-RPC server listening port",
        Value: common.DefaultHttpPort,
    }
    RPCCORSDomainFlag = cli.StringFlag{
        Name:  "rpccorsdomain",
        Usage: "Domains from which to accept cross origin requests (browser enforced)",
        Value: "",
    }
    RPCApiFlag = cli.StringFlag{
        Name:  "rpcapi",
        Usage: "API's offered over the HTTP-RPC interface",
        Value: rpc.DefaultHttpRpcApis,
    }
    IPCDisabledFlag = cli.BoolFlag{
        Name:  "ipcdisable",
        Usage: "Disable the IPC-RPC server",
    }
    IPCApiFlag = cli.StringFlag{
        Name:  "ipcapi",
        Usage: "API's offered over the IPC-RPC interface",
        Value: rpc.DefaultIpcApis,
    }
    IPCPathFlag = DirectoryFlag{
        Name:  "ipcpath",
        Usage: "Filename for IPC socket/pipe within the datadir (explicit paths escape it)",
        Value: DirectoryString{common.DefaultIpcSocket},
    }
    WSEnabledFlag = cli.BoolFlag{
        Name:  "ws",
        Usage: "Enable the WS-RPC server",
    }
    WSListenAddrFlag = cli.StringFlag{
        Name:  "wsaddr",
        Usage: "WS-RPC server listening interface",
        Value: common.DefaultWsHost,
    }
    WSPortFlag = cli.IntFlag{
        Name:  "wsport",
        Usage: "WS-RPC server listening port",
        Value: common.DefaultWsPort,
    }
    WSApiFlag = cli.StringFlag{
        Name:  "wsapi",
        Usage: "API's offered over the WS-RPC interface",
        Value: rpc.DefaultHttpRpcApis,
    }
    WSCORSDomainFlag = cli.StringFlag{
        Name:  "wscorsdomain",
        Usage: "Domains from which to accept websockets requests",
        Value: "",
    }
    ExecFlag = cli.StringFlag{
        Name:  "exec",
        Usage: "Execute JavaScript statement (only in combination with console/attach)",
    }

    // 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",
        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)",
    }
    WhisperEnabledFlag = cli.BoolFlag{
        Name:  "shh",
        Usage: "Enable Whisper",
    }
    // ATM the url is left to the user and deployment to
    JSpathFlag = cli.StringFlag{
        Name:  "jspath",
        Usage: "JavaSript root path for `loadScript` and document root for `admin.httpGet`",
        Value: ".",
    }
    SolcPathFlag = cli.StringFlag{
        Name:  "solc",
        Usage: "Solidity compiler command to be used",
        Value: "solc",
    }

    // Gas price oracle settings
    GpoMinGasPriceFlag = cli.StringFlag{
        Name:  "gpomin",
        Usage: "Minimum suggested gas price",
        Value: new(big.Int).Mul(big.NewInt(50), common.Shannon).String(),
    }
    GpoMaxGasPriceFlag = cli.StringFlag{
        Name:  "gpomax",
        Usage: "Maximum suggested gas price",
        Value: new(big.Int).Mul(big.NewInt(500), common.Shannon).String(),
    }
    GpoFullBlockRatioFlag = cli.IntFlag{
        Name:  "gpofull",
        Usage: "Full block threshold for gas price calculation (%)",
        Value: 80,
    }
    GpobaseStepDownFlag = cli.IntFlag{
        Name:  "gpobasedown",
        Usage: "Suggested gas price base step down ratio (1/1000)",
        Value: 10,
    }
    GpobaseStepUpFlag = cli.IntFlag{
        Name:  "gpobaseup",
        Usage: "Suggested gas price base step up ratio (1/1000)",
        Value: 100,
    }
    GpobaseCorrectionFactorFlag = cli.IntFlag{
        Name:  "gpobasecf",
        Usage: "Suggested gas price base correction factor (%)",
        Value: 110,
    }
)

// MustMakeDataDir 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 MustMakeDataDir(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 ""
}

// MakeIpcPath 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 MakeIpcPath(ctx *cli.Context) string {
    if ctx.GlobalBool(IPCDisabledFlag.Name) {
        return ""
    }
    return ctx.GlobalString(IPCPathFlag.Name)
}

// MakeNodeKey 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 MakeNodeKey(ctx *cli.Context) *ecdsa.PrivateKey {
    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)
        }

    case hex != "":
        if key, err = crypto.HexToECDSA(hex); err != nil {
            Fatalf("Option %q: %v", NodeKeyHexFlag.Name, err)
        }
    }
    return key
}

// MakeNodeName creates a node name from a base set and the command line flags.
func MakeNodeName(client, version string, ctx *cli.Context) string {
    name := common.MakeName(client, version)
    if identity := ctx.GlobalString(IdentityFlag.Name); len(identity) > 0 {
        name += "/" + identity
    }
    if ctx.GlobalBool(VMEnableJitFlag.Name) {
        name += "/JIT"
    }
    return name
}

// MakeBootstrapNodes creates a list of bootstrap nodes from the command line
// flags, reverting to pre-configured ones if none have been specified.
func MakeBootstrapNodes(ctx *cli.Context) []*discover.Node {
    // Return pre-configured nodes if none were manually requested
    if !ctx.GlobalIsSet(BootnodesFlag.Name) {
        if ctx.GlobalBool(TestNetFlag.Name) {
            return TestNetBootNodes
        }
        return FrontierBootNodes
    }
    // Otherwise parse and use the CLI bootstrap nodes
    bootnodes := []*discover.Node{}

    for _, url := range strings.Split(ctx.GlobalString(BootnodesFlag.Name), ",") {
        node, err := discover.ParseNode(url)
        if err != nil {
            glog.V(logger.Error).Infof("Bootstrap URL %s: %v\n", url, err)
            continue
        }
        bootnodes = append(bootnodes, node)
    }
    return bootnodes
}

// MakeListenAddress creates a TCP listening address string from set command
// line flags.
func MakeListenAddress(ctx *cli.Context) string {
    return fmt.Sprintf(":%d", ctx.GlobalInt(ListenPortFlag.Name))
}

// MakeNAT creates a port mapper from set command line flags.
func MakeNAT(ctx *cli.Context) nat.Interface {
    natif, err := nat.Parse(ctx.GlobalString(NATFlag.Name))
    if err != nil {
        Fatalf("Option %s: %v", NATFlag.Name, err)
    }
    return natif
}

// MakeHttpRpcHost creates the HTTP RPC listener interface string from the set
// command line flags, returning empty if the HTTP endpoint is disabled.
func MakeHttpRpcHost(ctx *cli.Context) string {
    if !ctx.GlobalBool(RPCEnabledFlag.Name) {
        return ""
    }
    return ctx.GlobalString(RPCListenAddrFlag.Name)
}

// MakeWsRpcHost creates the WebSocket RPC listener interface string from the set
// command line flags, returning empty if the HTTP endpoint is disabled.
func MakeWsRpcHost(ctx *cli.Context) string {
    if !ctx.GlobalBool(WSEnabledFlag.Name) {
        return ""
    }
    return ctx.GlobalString(WSListenAddrFlag.Name)
}

// MakeGenesisBlock loads up a genesis block from an input file specified in the
// command line, or returns the empty string if none set.
func MakeGenesisBlock(ctx *cli.Context) string {
    genesis := ctx.GlobalString(GenesisFileFlag.Name)
    if genesis == "" {
        return ""
    }
    data, err := ioutil.ReadFile(genesis)
    if err != nil {
        Fatalf("Failed to load custom genesis file: %v", err)
    }
    return string(data)
}

// MakeAccountManager creates an account manager from set command line flags.
func MakeAccountManager(ctx *cli.Context) *accounts.Manager {
    // Create the keystore crypto primitive, light if requested
    scryptN := crypto.StandardScryptN
    scryptP := crypto.StandardScryptP

    if ctx.GlobalBool(LightKDFFlag.Name) {
        scryptN = crypto.LightScryptN
        scryptP = crypto.LightScryptP
    }
    // Assemble an account manager using the configured datadir
    var (
        datadir  = MustMakeDataDir(ctx)
        keystore = crypto.NewKeyStorePassphrase(filepath.Join(datadir, "keystore"), scryptN, scryptP)
    )
    return accounts.NewManager(keystore)
}

// 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(accman *accounts.Manager, account string) (a common.Address, err error) {
    // If the specified account is a valid address, return it
    if common.IsHexAddress(account) {
        return common.HexToAddress(account), nil
    }
    // Otherwise try to interpret the account as a keystore index
    index, err := strconv.Atoi(account)
    if err != nil {
        return a, fmt.Errorf("invalid account address or index %q", account)
    }
    hex, err := accman.AddressByIndex(index)
    if err != nil {
        return a, fmt.Errorf("can't get account #%d (%v)", index, err)
    }
    return common.HexToAddress(hex), nil
}

// MakeEtherbase retrieves the etherbase either from the directly specified
// command line flags or from the keystore if CLI indexed.
func MakeEtherbase(accman *accounts.Manager, ctx *cli.Context) common.Address {
    accounts, _ := accman.Accounts()
    if !ctx.GlobalIsSet(EtherbaseFlag.Name) && len(accounts) == 0 {
        glog.V(logger.Error).Infoln("WARNING: No etherbase set and no accounts found as default")
        return common.Address{}
    }
    etherbase := ctx.GlobalString(EtherbaseFlag.Name)
    if etherbase == "" {
        return common.Address{}
    }
    // If the specified etherbase is a valid address, return it
    addr, err := MakeAddress(accman, etherbase)
    if err != nil {
        Fatalf("Option %q: %v", EtherbaseFlag.Name, err)
    }
    return addr
}

// MakeMinerExtra resolves extradata for the miner from the set command line flags
// or returns a default one composed on the client, runtime and OS metadata.
func MakeMinerExtra(extra []byte, ctx *cli.Context) []byte {
    if ctx.GlobalIsSet(ExtraDataFlag.Name) {
        return []byte(ctx.GlobalString(ExtraDataFlag.Name))
    }
    return extra
}

// MakePasswordList loads up a list of password from a file specified by the
// command line flags.
func MakePasswordList(ctx *cli.Context) []string {
    if path := ctx.GlobalString(PasswordFileFlag.Name); path != "" {
        blob, err := ioutil.ReadFile(path)
        if err != nil {
            Fatalf("Failed to read password file: %v", err)
        }
        return strings.Split(string(blob), "\n")
    }
    return nil
}

// MakeSystemNode sets up a local node, configures the services to launch and
// assembles the P2P protocol stack.
func MakeSystemNode(name, version string, extra []byte, ctx *cli.Context) *node.Node {
    // Avoid conflicting network flags
    networks, netFlags := 0, []cli.BoolFlag{DevModeFlag, TestNetFlag, OlympicFlag}
    for _, flag := range netFlags {
        if ctx.GlobalBool(flag.Name) {
            networks++
        }
    }
    if networks > 1 {
        Fatalf("The %v flags are mutually exclusive", netFlags)
    }
    // Configure the node's service container
    stackConf := &node.Config{
        DataDir:         MustMakeDataDir(ctx),
        PrivateKey:      MakeNodeKey(ctx),
        Name:            MakeNodeName(name, version, ctx),
        NoDiscovery:     ctx.GlobalBool(NoDiscoverFlag.Name),
        BootstrapNodes:  MakeBootstrapNodes(ctx),
        ListenAddr:      MakeListenAddress(ctx),
        NAT:             MakeNAT(ctx),
        MaxPeers:        ctx.GlobalInt(MaxPeersFlag.Name),
        MaxPendingPeers: ctx.GlobalInt(MaxPendingPeersFlag.Name),
        IpcPath:         MakeIpcPath(ctx),
        HttpHost:        MakeHttpRpcHost(ctx),
        HttpPort:        ctx.GlobalInt(RPCPortFlag.Name),
        HttpCors:        ctx.GlobalString(RPCCORSDomainFlag.Name),
        HttpModules:     strings.Split(ctx.GlobalString(RPCApiFlag.Name), ","),
        WsHost:          MakeWsRpcHost(ctx),
        WsPort:          ctx.GlobalInt(WSPortFlag.Name),
        WsCors:          ctx.GlobalString(WSCORSDomainFlag.Name),
        WsModules:       strings.Split(ctx.GlobalString(WSApiFlag.Name), ","),
    }
    // Configure the Ethereum service
    accman := MakeAccountManager(ctx)

    ethConf := &eth.Config{
        Genesis:                 MakeGenesisBlock(ctx),
        FastSync:                ctx.GlobalBool(FastSyncFlag.Name),
        BlockChainVersion:       ctx.GlobalInt(BlockchainVersionFlag.Name),
        DatabaseCache:           ctx.GlobalInt(CacheFlag.Name),
        NetworkId:               ctx.GlobalInt(NetworkIdFlag.Name),
        AccountManager:          accman,
        Etherbase:               MakeEtherbase(accman, ctx),
        MinerThreads:            ctx.GlobalInt(MinerThreadsFlag.Name),
        ExtraData:               MakeMinerExtra(extra, ctx),
        NatSpec:                 ctx.GlobalBool(NatspecEnabledFlag.Name),
        DocRoot:                 ctx.GlobalString(DocRootFlag.Name),
        GasPrice:                common.String2Big(ctx.GlobalString(GasPriceFlag.Name)),
        GpoMinGasPrice:          common.String2Big(ctx.GlobalString(GpoMinGasPriceFlag.Name)),
        GpoMaxGasPrice:          common.String2Big(ctx.GlobalString(GpoMaxGasPriceFlag.Name)),
        GpoFullBlockRatio:       ctx.GlobalInt(GpoFullBlockRatioFlag.Name),
        GpobaseStepDown:         ctx.GlobalInt(GpobaseStepDownFlag.Name),
        GpobaseStepUp:           ctx.GlobalInt(GpobaseStepUpFlag.Name),
        GpobaseCorrectionFactor: ctx.GlobalInt(GpobaseCorrectionFactorFlag.Name),
        SolcPath:                ctx.GlobalString(SolcPathFlag.Name),
        AutoDAG:                 ctx.GlobalBool(AutoDAGFlag.Name) || ctx.GlobalBool(MiningEnabledFlag.Name),
    }
    // Configure the Whisper service
    shhEnable := ctx.GlobalBool(WhisperEnabledFlag.Name)

    // Override any default configs in dev mode or the test net
    switch {
    case ctx.GlobalBool(OlympicFlag.Name):
        if !ctx.GlobalIsSet(NetworkIdFlag.Name) {
            ethConf.NetworkId = 1
        }
        if !ctx.GlobalIsSet(GenesisFileFlag.Name) {
            ethConf.Genesis = core.OlympicGenesisBlock()
        }

    case ctx.GlobalBool(TestNetFlag.Name):
        if !ctx.GlobalIsSet(NetworkIdFlag.Name) {
            ethConf.NetworkId = 2
        }
        if !ctx.GlobalIsSet(GenesisFileFlag.Name) {
            ethConf.Genesis = core.TestNetGenesisBlock()
        }
        state.StartingNonce = 1048576 // (2**20)

    case ctx.GlobalBool(DevModeFlag.Name):
        // Override the base network stack configs
        if !ctx.GlobalIsSet(DataDirFlag.Name) {
            stackConf.DataDir = filepath.Join(os.TempDir(), "/ethereum_dev_mode")
        }
        if !ctx.GlobalIsSet(MaxPeersFlag.Name) {
            stackConf.MaxPeers = 0
        }
        if !ctx.GlobalIsSet(ListenPortFlag.Name) {
            stackConf.ListenAddr = ":0"
        }
        // Override the Ethereum protocol configs
        if !ctx.GlobalIsSet(GenesisFileFlag.Name) {
            ethConf.Genesis = core.OlympicGenesisBlock()
        }
        if !ctx.GlobalIsSet(GasPriceFlag.Name) {
            ethConf.GasPrice = new(big.Int)
        }
        if !ctx.GlobalIsSet(WhisperEnabledFlag.Name) {
            shhEnable = true
        }
        if !ctx.GlobalIsSet(VMDebugFlag.Name) {
            vm.Debug = true
        }
        ethConf.PowTest = true
    }
    // Assemble and return the protocol stack
    stack, err := node.New(stackConf)
    if err != nil {
        Fatalf("Failed to create the protocol stack: %v", err)
    }
    if err := stack.Register(func(ctx *node.ServiceContext) (node.Service, error) {
        return eth.New(ctx, ethConf)
    }); err != nil {
        Fatalf("Failed to register the Ethereum service: %v", err)
    }
    if shhEnable {
        if err := stack.Register(func(*node.ServiceContext) (node.Service, error) { return whisper.New(), nil }); err != nil {
            Fatalf("Failed to register the Whisper service: %v", err)
        }
    }

    return stack
}

// SetupNetwork configures the system for either the main net or some test network.
func SetupNetwork(ctx *cli.Context) {
    switch {
    case ctx.GlobalBool(OlympicFlag.Name):
        params.DurationLimit = big.NewInt(8)
        params.GenesisGasLimit = big.NewInt(3141592)
        params.MinGasLimit = big.NewInt(125000)
        params.MaximumExtraDataSize = big.NewInt(1024)
        NetworkIdFlag.Value = 0
        core.BlockReward = big.NewInt(1.5e+18)
        core.ExpDiffPeriod = big.NewInt(math.MaxInt64)
    }
}

// SetupVM configured the VM package's global settings
func SetupVM(ctx *cli.Context) {
    vm.EnableJit = ctx.GlobalBool(VMEnableJitFlag.Name)
    vm.ForceJit = ctx.GlobalBool(VMForceJitFlag.Name)
    vm.SetJITCacheSize(ctx.GlobalInt(VMJitCacheFlag.Name))
    if ctx.GlobalIsSet(VMDebugFlag.Name) {
        vm.Debug = ctx.GlobalBool(VMDebugFlag.Name)
    }
}

// MakeChain creates a chain manager from set command line flags.
func MakeChain(ctx *cli.Context) (chain *core.BlockChain, chainDb ethdb.Database) {
    datadir := MustMakeDataDir(ctx)
    cache := ctx.GlobalInt(CacheFlag.Name)

    var err error
    if chainDb, err = ethdb.NewLDBDatabase(filepath.Join(datadir, "chaindata"), cache); err != nil {
        Fatalf("Could not open database: %v", err)
    }
    if ctx.GlobalBool(OlympicFlag.Name) {
        _, err := core.WriteTestNetGenesisBlock(chainDb)
        if err != nil {
            glog.Fatalln(err)
        }
    }

    eventMux := new(event.TypeMux)
    pow := ethash.New()
    //genesis := core.GenesisBlock(uint64(ctx.GlobalInt(GenesisNonceFlag.Name)), blockDB)
    chain, err = core.NewBlockChain(chainDb, pow, eventMux)
    if err != nil {
        Fatalf("Could not start chainmanager: %v", err)
    }
    return chain, chainDb
}