Пример #1
0
func main() {
	logger.AddLogSystem(logger.NewStdLogSystem(os.Stdout, log.LstdFlags, logger.InfoLevel))

	// Generate the peer identity
	key, err := crypto.GenerateKey()
	if err != nil {
		fmt.Printf("Failed to generate peer key: %v.\n", err)
		os.Exit(-1)
	}
	name := common.MakeName("whisper-go", "1.0")
	shh := whisper.New()

	// Create an Ethereum peer to communicate through
	server := p2p.Server{
		PrivateKey: key,
		MaxPeers:   10,
		Name:       name,
		Protocols:  []p2p.Protocol{shh.Protocol()},
		ListenAddr: ":30300",
		NAT:        nat.Any(),
	}
	fmt.Println("Starting Ethereum peer...")
	if err := server.Start(); err != nil {
		fmt.Printf("Failed to start Ethereum peer: %v.\n", err)
		os.Exit(1)
	}

	// Send a message to self to check that something works
	payload := fmt.Sprintf("Hello world, this is %v. In case you're wondering, the time is %v", name, time.Now())
	if err := selfSend(shh, []byte(payload)); err != nil {
		fmt.Printf("Failed to self message: %v.\n", err)
		os.Exit(-1)
	}
}
Пример #2
0
// 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 := &eth.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
}
Пример #3
0
// 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
}