// New creates a Ethereum client, pre-configured to one of the supported networks.
func New(datadir string, network EthereumNetwork) (*Geth, error) {
// Tag the data dir with the network name
switch network {
case MainNet:
datadir = filepath.Join(datadir, "mainnet")
case TestNet:
datadir = filepath.Join(datadir, "testnet")
default:
return nil, fmt.Errorf("unsupported network: %v", network)
}
// Select the bootstrap nodes based on the network
bootnodes := utils.FrontierBootNodes
if network == TestNet {
bootnodes = utils.TestNetBootNodes
}
// Configure the node's service container
stackConf := &node.Config{
DataDir: datadir,
Name: common.MakeName(NodeName, NodeVersion),
BootstrapNodes: bootnodes,
ListenAddr: fmt.Sprintf(":%d", NodePort),
MaxPeers: NodeMaxPeers,
}
// Configure the bare-bone Ethereum service
keystore := crypto.NewKeyStorePassphrase(filepath.Join(datadir, "keystore"), crypto.StandardScryptN, crypto.StandardScryptP)
ethConf := ð.Config{
FastSync: true,
DatabaseCache: 64,
NetworkId: int(network),
AccountManager: accounts.NewManager(keystore),
// Blatantly initialize the gas oracle to the defaults from go-ethereum
GpoMinGasPrice: new(big.Int).Mul(big.NewInt(50), common.Shannon),
GpoMaxGasPrice: new(big.Int).Mul(big.NewInt(500), common.Shannon),
GpoFullBlockRatio: 80,
GpobaseStepDown: 10,
GpobaseStepUp: 100,
GpobaseCorrectionFactor: 110,
}
// Override any default configs in the test network
if network == TestNet {
ethConf.NetworkId = 2
ethConf.Genesis = core.TestNetGenesisBlock()
state.StartingNonce = 1048576 // (2**20)
}
// Assemble and return the protocol stack
stack, err := node.New(stackConf)
if err != nil {
return nil, fmt.Errorf("protocol stack: %v", err)
}
if err := stack.Register(func(ctx *node.ServiceContext) (node.Service, error) { return eth.New(ctx, ethConf) }); err != nil {
return nil, fmt.Errorf("ethereum service: %v", err)
}
return &Geth{
stack: stack,
keystore: keystore,
}, 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),
}
// Configure the Ethereum service
accman := MakeAccountManager(ctx)
ethConf := ð.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
}