135 lines
3.1 KiB
Go
135 lines
3.1 KiB
Go
package server
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import (
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"context"
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"fmt"
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"os"
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"os/signal"
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"github.com/CityOfZion/neo-go/config"
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"github.com/CityOfZion/neo-go/pkg/core"
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"github.com/CityOfZion/neo-go/pkg/core/storage"
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"github.com/CityOfZion/neo-go/pkg/network"
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"github.com/CityOfZion/neo-go/pkg/rpc"
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"github.com/pkg/errors"
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log "github.com/sirupsen/logrus"
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"github.com/urfave/cli"
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)
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// NewCommand creates a new Node command.
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func NewCommand() cli.Command {
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return cli.Command{
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Name: "node",
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Usage: "start a NEO node",
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Action: startServer,
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Flags: []cli.Flag{
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cli.StringFlag{Name: "config-path"},
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cli.BoolFlag{Name: "privnet, p"},
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cli.BoolFlag{Name: "mainnet, m"},
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cli.BoolFlag{Name: "testnet, t"},
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cli.BoolFlag{Name: "debug, d"},
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},
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}
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}
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func newGraceContext() context.Context {
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ctx, cancel := context.WithCancel(context.Background())
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stop := make(chan os.Signal, 1)
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signal.Notify(stop, os.Interrupt)
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go func() {
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<-stop
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cancel()
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}()
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return ctx
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}
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func startServer(ctx *cli.Context) error {
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net := config.ModePrivNet
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if ctx.Bool("testnet") {
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net = config.ModeTestNet
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}
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if ctx.Bool("mainnet") {
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net = config.ModeMainNet
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}
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grace, cancel := context.WithCancel(newGraceContext())
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defer cancel()
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configPath := "./config"
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if argCp := ctx.String("config-path"); argCp != "" {
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configPath = argCp
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}
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cfg, err := config.Load(configPath, net)
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if err != nil {
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return cli.NewExitError(err, 1)
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}
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serverConfig := network.NewServerConfig(cfg)
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chain, err := initBlockChain(grace, cfg)
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if err != nil {
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return err
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}
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if ctx.Bool("debug") {
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log.SetLevel(log.DebugLevel)
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}
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server := network.NewServer(serverConfig, chain)
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rpcServer := rpc.NewServer(chain, cfg.ApplicationConfiguration.RPCPort, server)
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errChan := make(chan error)
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go server.Start(errChan)
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go rpcServer.Start(errChan)
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fmt.Println(logo())
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fmt.Println(server.UserAgent)
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fmt.Println()
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var shutdownErr error
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Main:
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for {
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select {
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case err := <-errChan:
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shutdownErr = errors.Wrap(err, "Error encountered by server")
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cancel()
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case <-grace.Done():
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server.Shutdown()
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if serverErr := rpcServer.Shutdown(); serverErr != nil {
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shutdownErr = errors.Wrap(serverErr, "Error encountered whilst shutting down server")
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}
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break Main
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}
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}
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if shutdownErr != nil {
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return cli.NewExitError(shutdownErr, 1)
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}
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return nil
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}
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// initBlockChain initializes BlockChain with preselected DB.
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func initBlockChain(context context.Context, cfg config.Config) (*core.Blockchain, error) {
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store, err := storage.NewStore(context, cfg.ApplicationConfiguration.DBConfiguration)
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if err != nil {
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return nil, cli.NewExitError(fmt.Errorf("could not initialize storage: %s", err), 1)
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}
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chain, err := core.NewBlockchain(context, store, cfg.ProtocolConfiguration)
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if err != nil {
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return nil, cli.NewExitError(fmt.Errorf("could not initialize blockchain: %s", err), 1)
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}
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return chain, nil
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}
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func logo() string {
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return `
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_ ____________ __________
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/ | / / ____/ __ \ / ____/ __ \
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/ |/ / __/ / / / /_____/ / __/ / / /
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/ /| / /___/ /_/ /_____/ /_/ / /_/ /
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/_/ |_/_____/\____/ \____/\____/
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`
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}
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