status-go/geth/node/node.go

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