271 lines
8.2 KiB
Go
271 lines
8.2 KiB
Go
package node
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import (
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"encoding/json"
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"errors"
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"fmt"
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"os"
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"path"
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"path/filepath"
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"strings"
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gethcommon "github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/eth"
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"github.com/ethereum/go-ethereum/eth/downloader"
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"github.com/ethereum/go-ethereum/les"
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"github.com/ethereum/go-ethereum/light"
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"github.com/ethereum/go-ethereum/node"
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"github.com/ethereum/go-ethereum/p2p"
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"github.com/ethereum/go-ethereum/p2p/discover"
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"github.com/ethereum/go-ethereum/p2p/discv5"
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"github.com/ethereum/go-ethereum/p2p/nat"
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gethparams "github.com/ethereum/go-ethereum/params"
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"github.com/ethereum/go-ethereum/whisper/mailserver"
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"github.com/ethereum/go-ethereum/whisper/notifications"
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whisper "github.com/ethereum/go-ethereum/whisper/whisperv5"
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"github.com/status-im/status-go/geth/log"
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"github.com/status-im/status-go/geth/params"
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)
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// node-related errors
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var (
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ErrEthServiceRegistrationFailure = errors.New("failed to register the Ethereum service")
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ErrWhisperServiceRegistrationFailure = errors.New("failed to register the Whisper service")
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ErrLightEthRegistrationFailure = errors.New("failed to register the LES service")
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ErrNodeMakeFailure = errors.New("error creating p2p node")
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ErrNodeRunFailure = errors.New("error running p2p node")
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ErrNodeStartFailure = errors.New("error starting p2p node")
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)
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// MakeNode create a geth node entity
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func MakeNode(config *params.NodeConfig) (*node.Node, error) {
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// make sure data directory exists
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if err := os.MkdirAll(filepath.Join(config.DataDir), os.ModePerm); err != nil {
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return nil, err
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}
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// make sure keys directory exists
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if err := os.MkdirAll(filepath.Join(config.KeyStoreDir), os.ModePerm); err != nil {
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return nil, err
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}
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// configure required node (should you need to update node's config, e.g. add bootstrap nodes, see node.Config)
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stackConfig := defaultEmbeddedNodeConfig(config)
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if len(config.NodeKeyFile) > 0 {
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log.Info("Loading private key file", "file", config.NodeKeyFile)
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pk, err := crypto.LoadECDSA(config.NodeKeyFile)
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if err != nil {
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log.Warn(fmt.Sprintf("Failed loading private key file '%s': %v", config.NodeKeyFile, err))
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}
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// override node's private key
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stackConfig.P2P.PrivateKey = pk
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}
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stack, err := node.New(stackConfig)
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if err != nil {
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return nil, ErrNodeMakeFailure
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}
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// start Ethereum service if we are not expected to use an upstream server.
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if !config.UpstreamConfig.Enabled {
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if err := activateEthService(stack, config); err != nil {
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return nil, fmt.Errorf("%v: %v", ErrEthServiceRegistrationFailure, err)
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}
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} else {
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// TODO(divan): FIXME: this is rude workaround for #294 issue
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// we start activate LES service to have RPC handler for `eth_accounts` call
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// should be removed once proper own RPC and refactoring is completed
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config.MaxPeers = 0
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if err := activateEthService(stack, config); err != nil {
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return nil, fmt.Errorf("%v: %v", ErrEthServiceRegistrationFailure, err)
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}
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log.Info("Blockchain synchronization is switched off, RPC requests will be proxied to " + config.UpstreamConfig.URL)
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}
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// start Whisper service
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if err := activateShhService(stack, config); err != nil {
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return nil, fmt.Errorf("%v: %v", ErrWhisperServiceRegistrationFailure, err)
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}
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return stack, nil
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}
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// defaultEmbeddedNodeConfig returns default stack configuration for mobile client node
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func defaultEmbeddedNodeConfig(config *params.NodeConfig) *node.Config {
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nc := &node.Config{
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DataDir: config.DataDir,
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KeyStoreDir: config.KeyStoreDir,
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UseLightweightKDF: true,
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NoUSB: true,
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Name: config.Name,
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Version: config.Version,
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P2P: p2p.Config{
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NoDiscovery: true,
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DiscoveryV5: true,
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DiscoveryV5Addr: ":0",
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BootstrapNodes: makeBootstrapNodes(),
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BootstrapNodesV5: makeBootstrapNodesV5(),
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ListenAddr: ":0",
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NAT: nat.Any(),
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MaxPeers: config.MaxPeers,
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MaxPendingPeers: config.MaxPendingPeers,
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},
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IPCPath: makeIPCPath(config),
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HTTPCors: []string{"*"},
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HTTPModules: strings.Split(config.APIModules, ","),
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WSHost: makeWSHost(config),
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WSPort: config.WSPort,
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WSOrigins: []string{"*"},
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WSModules: strings.Split(config.APIModules, ","),
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}
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if config.RPCEnabled {
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nc.HTTPHost = config.HTTPHost
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nc.HTTPPort = config.HTTPPort
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}
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return nc
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}
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// updateCHT changes trusted canonical hash trie root
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func updateCHT(eth *les.LightEthereum, config *params.NodeConfig) {
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if !config.BootClusterConfig.Enabled {
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return
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}
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if config.BootClusterConfig.RootNumber == 0 {
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return
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}
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if config.BootClusterConfig.RootHash == "" {
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return
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}
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eth.WriteTrustedCht(light.TrustedCht{
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Number: uint64(config.BootClusterConfig.RootNumber),
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Root: gethcommon.HexToHash(config.BootClusterConfig.RootHash),
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})
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log.Info("Added trusted CHT",
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"develop", config.DevMode, "number", config.BootClusterConfig.RootNumber, "hash", config.BootClusterConfig.RootHash)
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}
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// activateEthService configures and registers the eth.Ethereum service with a given node.
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func activateEthService(stack *node.Node, config *params.NodeConfig) error {
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if !config.LightEthConfig.Enabled {
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log.Info("LES protocol is disabled")
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return nil
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}
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var genesis *core.Genesis
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if config.LightEthConfig.Genesis != "" {
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genesis = new(core.Genesis)
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if err := json.Unmarshal([]byte(config.LightEthConfig.Genesis), genesis); err != nil {
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return fmt.Errorf("invalid genesis spec: %v", err)
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}
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}
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ethConf := eth.DefaultConfig
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ethConf.Genesis = genesis
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ethConf.SyncMode = downloader.LightSync
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ethConf.NetworkId = config.NetworkID
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ethConf.DatabaseCache = config.LightEthConfig.DatabaseCache
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ethConf.MaxPeers = config.MaxPeers
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if err := stack.Register(func(ctx *node.ServiceContext) (node.Service, error) {
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lightEth, err := les.New(ctx, ðConf)
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if err == nil {
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updateCHT(lightEth, config)
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}
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return lightEth, err
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}); err != nil {
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return fmt.Errorf("%v: %v", ErrLightEthRegistrationFailure, err)
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}
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return nil
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}
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// activateShhService configures Whisper and adds it to the given node.
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func activateShhService(stack *node.Node, config *params.NodeConfig) error {
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if !config.WhisperConfig.Enabled {
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log.Info("SHH protocol is disabled")
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return nil
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}
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serviceConstructor := func(*node.ServiceContext) (node.Service, error) {
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whisperConfig := config.WhisperConfig
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whisperService := whisper.New(nil)
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// enable mail service
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if whisperConfig.MailServerNode {
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password, err := whisperConfig.ReadPasswordFile()
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if err != nil {
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return nil, err
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}
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var mailServer mailserver.WMailServer
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whisperService.RegisterServer(&mailServer)
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mailServer.Init(whisperService, whisperConfig.DataDir, string(password), whisperConfig.MinimumPoW)
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}
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// enable notification service
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if whisperConfig.NotificationServerNode {
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var notificationServer notifications.NotificationServer
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whisperService.RegisterNotificationServer(¬ificationServer)
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notificationServer.Init(whisperService, whisperConfig)
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}
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return whisperService, nil
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}
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return stack.Register(serviceConstructor)
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}
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// makeIPCPath returns IPC-RPC filename
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func makeIPCPath(config *params.NodeConfig) string {
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if !config.IPCEnabled {
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return ""
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}
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return path.Join(config.DataDir, config.IPCFile)
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}
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// makeWSHost returns WS-RPC Server host, given enabled/disabled flag
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func makeWSHost(config *params.NodeConfig) string {
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if !config.WSEnabled {
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return ""
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}
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return config.WSHost
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}
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// makeBootstrapNodes returns default (hence bootstrap) list of peers
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func makeBootstrapNodes() []*discover.Node {
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// on desktops params.TestnetBootnodes and params.MainBootnodes,
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// on mobile client we deliberately keep this list empty
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enodes := []string{}
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var bootstrapNodes []*discover.Node
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for _, enode := range enodes {
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bootstrapNodes = append(bootstrapNodes, discover.MustParseNode(enode))
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}
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return bootstrapNodes
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}
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// makeBootstrapNodesV5 returns default (hence bootstrap) list of peers
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func makeBootstrapNodesV5() []*discv5.Node {
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enodes := gethparams.DiscoveryV5Bootnodes
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var bootstrapNodes []*discv5.Node
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for _, enode := range enodes {
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bootstrapNodes = append(bootstrapNodes, discv5.MustParseNode(enode))
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}
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return bootstrapNodes
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}
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