prysm-pulse/beacon-chain/node/node.go
2018-07-28 20:44:24 -04:00

176 lines
4.7 KiB
Go

package node
import (
"context"
"fmt"
"os"
"os/signal"
"sync"
"syscall"
"github.com/ethereum/go-ethereum/common"
"github.com/prysmaticlabs/prysm/beacon-chain/blockchain"
"github.com/prysmaticlabs/prysm/beacon-chain/database"
"github.com/prysmaticlabs/prysm/beacon-chain/powchain"
rbcsync "github.com/prysmaticlabs/prysm/beacon-chain/sync"
"github.com/prysmaticlabs/prysm/beacon-chain/utils"
"github.com/prysmaticlabs/prysm/shared"
"github.com/prysmaticlabs/prysm/shared/cmd"
"github.com/prysmaticlabs/prysm/shared/debug"
"github.com/prysmaticlabs/prysm/shared/p2p"
"github.com/sirupsen/logrus"
"github.com/urfave/cli"
)
var log = logrus.WithField("prefix", "node")
var beaconChainDBName = "beaconchaindata"
// BeaconNode defines a struct that handles the services running a random beacon chain
// full PoS node. It handles the lifecycle of the entire system and registers
// services to a service registry.
type BeaconNode struct {
ctx *cli.Context
services *shared.ServiceRegistry
lock sync.RWMutex
stop chan struct{} // Channel to wait for termination notifications.
}
// New creates a new node instance, sets up configuration options, and registers
// every required service to the node.
func New(ctx *cli.Context) (*BeaconNode, error) {
registry := shared.NewServiceRegistry()
beacon := &BeaconNode{
ctx: ctx,
services: registry,
stop: make(chan struct{}),
}
path := ctx.GlobalString(cmd.DataDirFlag.Name)
if err := beacon.registerBeaconDB(path); err != nil {
return nil, err
}
if err := beacon.registerP2P(); err != nil {
return nil, err
}
if err := beacon.registerPOWChainService(); err != nil {
return nil, err
}
if err := beacon.registerBlockchainService(); err != nil {
return nil, err
}
if err := beacon.registerSyncService(); err != nil {
return nil, err
}
return beacon, nil
}
// Start the BeaconNode and kicks off every registered service.
func (b *BeaconNode) Start() {
b.lock.Lock()
log.Info("Starting beacon node")
b.services.StartAll()
stop := b.stop
b.lock.Unlock()
go func() {
sigc := make(chan os.Signal, 1)
signal.Notify(sigc, syscall.SIGINT, syscall.SIGTERM)
defer signal.Stop(sigc)
<-sigc
log.Info("Got interrupt, shutting down...")
go b.Close()
for i := 10; i > 0; i-- {
<-sigc
if i > 1 {
log.Info("Already shutting down, interrupt more to panic", "times", i-1)
}
}
debug.Exit() // Ensure trace and CPU profile data are flushed.
panic("Panic closing the beacon node")
}()
// Wait for stop channel to be closed.
<-stop
}
// Close handles graceful shutdown of the system.
func (b *BeaconNode) Close() {
b.lock.Lock()
defer b.lock.Unlock()
b.services.StopAll()
log.Info("Stopping beacon node")
close(b.stop)
}
func (b *BeaconNode) registerBeaconDB(path string) error {
config := &database.BeaconDBConfig{DataDir: path, Name: beaconChainDBName, InMemory: false}
beaconDB, err := database.NewBeaconDB(config)
if err != nil {
return fmt.Errorf("could not register beaconDB service: %v", err)
}
return b.services.RegisterService(beaconDB)
}
func (b *BeaconNode) registerP2P() error {
beaconp2p, err := p2p.NewServer()
if err != nil {
return fmt.Errorf("could not register p2p service: %v", err)
}
return b.services.RegisterService(beaconp2p)
}
func (b *BeaconNode) registerBlockchainService() error {
var beaconDB *database.BeaconDB
if err := b.services.FetchService(&beaconDB); err != nil {
return err
}
var web3Service *powchain.Web3Service
if err := b.services.FetchService(&web3Service); err != nil {
return err
}
blockchainService, err := blockchain.NewChainService(context.TODO(), beaconDB, web3Service)
if err != nil {
return fmt.Errorf("could not register blockchain service: %v", err)
}
return b.services.RegisterService(blockchainService)
}
func (b *BeaconNode) registerPOWChainService() error {
web3Service, err := powchain.NewWeb3Service(context.TODO(), &powchain.Web3ServiceConfig{
Endpoint: b.ctx.GlobalString(utils.Web3ProviderFlag.Name),
Pubkey: b.ctx.GlobalString(utils.PubKeyFlag.Name),
VrcAddr: common.HexToAddress(b.ctx.GlobalString(utils.VrcContractFlag.Name)),
})
if err != nil {
return fmt.Errorf("could not register proof-of-work chain web3Service: %v", err)
}
return b.services.RegisterService(web3Service)
}
func (b *BeaconNode) registerSyncService() error {
var chainService *blockchain.ChainService
if err := b.services.FetchService(&chainService); err != nil {
return err
}
var p2pService *p2p.Server
if err := b.services.FetchService(&p2pService); err != nil {
return err
}
syncService := rbcsync.NewSyncService(context.Background(), rbcsync.DefaultConfig(), p2pService, chainService)
return b.services.RegisterService(syncService)
}