295 lines
8.4 KiB
Go
295 lines
8.4 KiB
Go
package geth
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import (
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"errors"
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"fmt"
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"io"
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"os"
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"path"
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"reflect"
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"runtime"
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"runtime/debug"
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"strings"
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"syscall"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/eth"
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"github.com/ethereum/go-ethereum/les"
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"github.com/ethereum/go-ethereum/logger/glog"
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"github.com/ethereum/go-ethereum/node"
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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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whisper "github.com/ethereum/go-ethereum/whisper/whisperv2"
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"github.com/status-im/status-go/geth/params"
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)
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const (
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EventNodeStarted = "node.started"
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EventNodeCrashed = "node.crashed"
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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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ErrSshServiceRegistrationFailure = 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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)
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// Node represents running node (serves as a wrapper around P2P node)
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type Node struct {
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config *params.NodeConfig // configuration used to create Status node
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geth *node.Node // reference to the running Geth node
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gethConfig *node.Config // configuration used to create P2P node
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started chan struct{} // channel to wait for node to start
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}
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// Inited checks whether status node has been properly initialized
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func (n *Node) Inited() bool {
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return n != nil && n.geth != nil
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}
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// GethStack returns reference to Geth stack
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func (n *Node) GethStack() *node.Node {
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return n.geth
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}
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// MakeNode create a geth node entity
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func MakeNode(config *params.NodeConfig) *Node {
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glog.CopyStandardLogTo("INFO")
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glog.SetToStderr(true)
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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 := &node.Config{
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DataDir: config.DataDir,
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UseLightweightKDF: true,
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Name: config.Name,
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Version: config.Version,
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NoDiscovery: true,
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DiscoveryV5: false,
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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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IPCPath: makeIPCPath(config),
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HTTPHost: config.HTTPHost,
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HTTPPort: config.HTTPPort,
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HTTPCors: "*",
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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: "*",
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WSModules: strings.Split(config.APIModules, ","),
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}
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stack, err := node.New(stackConfig)
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if err != nil {
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Fatalf(ErrNodeMakeFailure)
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}
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// start Ethereum service
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if err := activateEthService(stack, config); err != nil {
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Fatalf(fmt.Errorf("%v: %v", ErrEthServiceRegistrationFailure, err))
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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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Fatalf(fmt.Errorf("%v: %v", ErrSshServiceRegistrationFailure, err))
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}
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return &Node{
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geth: stack,
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gethConfig: stackConfig,
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started: make(chan struct{}),
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config: config,
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}
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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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ethConf := ð.Config{
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Etherbase: common.Address{},
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ChainConfig: makeChainConfig(config),
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FastSync: false,
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LightMode: true,
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MaxPeers: config.MaxPeers,
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DatabaseCache: config.LightEthConfig.DatabaseCache,
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DatabaseHandles: makeDatabaseHandles(),
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NetworkId: config.NetworkId,
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Genesis: config.LightEthConfig.Genesis,
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MinerThreads: runtime.NumCPU(),
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GasPrice: params.GasPrice,
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GpoMinGasPrice: params.GpoMinGasPrice,
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GpoMaxGasPrice: params.GpoMaxGasPrice,
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GpoFullBlockRatio: params.GpoFullBlockRatio,
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GpobaseStepDown: params.GpobaseStepDown,
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GpobaseStepUp: params.GpobaseStepUp,
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GpobaseCorrectionFactor: params.GpobaseCorrectionFactor,
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SolcPath: "solc",
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AutoDAG: false,
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}
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if err := stack.Register(func(ctx *node.ServiceContext) (node.Service, error) {
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return les.New(ctx, ethConf)
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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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serviceConstructor := func(*node.ServiceContext) (node.Service, error) {
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return whisper.New(), nil
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}
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if err := stack.Register(serviceConstructor); err != nil {
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return err
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}
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return nil
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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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// makeChainConfig reads the chain configuration from the database in the datadir.
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func makeChainConfig(config *params.NodeConfig) *gethparams.ChainConfig {
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chainConfig := new(gethparams.ChainConfig)
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// Homestead fork
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chainConfig.HomesteadBlock = config.HomesteadBlock
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// DAO fork
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chainConfig.DAOForkBlock = config.DAOForkBlock
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chainConfig.DAOForkSupport = config.DAOForkSupport
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// DoS reprice fork
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chainConfig.EIP150Block = config.EIP150Block
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chainConfig.EIP150Hash = config.EIP150Hash
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// DoS state cleanup fork
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chainConfig.EIP155Block = config.EIP155Block
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chainConfig.EIP158Block = config.EIP158Block
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chainConfig.ChainId = config.ChainId
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return chainConfig
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}
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// makeDatabaseHandles makes sure that enough file descriptors are available to the process
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// (and returns half of them for node's database to use)
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func makeDatabaseHandles() int {
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// current limit
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var limit syscall.Rlimit
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if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &limit); err != nil {
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Fatalf(err)
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}
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// increase limit
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limit.Cur = limit.Max
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if limit.Cur > params.DefaultFileDescriptorLimit {
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limit.Cur = params.DefaultFileDescriptorLimit
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}
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if err := syscall.Setrlimit(syscall.RLIMIT_NOFILE, &limit); err != nil {
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Fatalf(err)
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}
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// re-query limit
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if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &limit); err != nil {
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Fatalf(err)
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}
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// cap limit
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if limit.Cur > params.DefaultFileDescriptorLimit {
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limit.Cur = params.DefaultFileDescriptorLimit
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}
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return int(limit.Cur) / 2
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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 bootstapNodes []*discover.Node
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for _, enode := range enodes {
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bootstapNodes = append(bootstapNodes, discover.MustParseNode(enode))
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}
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return bootstapNodes
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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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// on desktops params.DiscoveryV5Bootnodes,
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// on mobile client we deliberately keep this list empty
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enodes := []string{}
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var bootstapNodes []*discv5.Node
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for _, enode := range enodes {
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bootstapNodes = append(bootstapNodes, discv5.MustParseNode(enode))
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}
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return bootstapNodes
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}
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func Fatalf(reason interface{}, args ...interface{}) {
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// decide on output stream
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w := io.MultiWriter(os.Stdout, os.Stderr)
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outf, _ := os.Stdout.Stat()
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errf, _ := os.Stderr.Stat()
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if outf != nil && errf != nil && os.SameFile(outf, errf) {
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w = os.Stderr
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}
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// find out whether error or string has been passed as a reason
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r := reflect.ValueOf(reason)
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if r.Kind() == reflect.String {
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fmt.Fprintf(w, "Fatal Failure: "+reason.(string)+"\n", args)
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} else {
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fmt.Fprintf(w, "Fatal Failure: %v\n", reason.(error))
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}
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debug.PrintStack()
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os.Exit(1)
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}
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// HaltOnPanic recovers from panic, logs issue, sends upward notification, and exits
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func HaltOnPanic() {
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if r := recover(); r != nil {
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err := fmt.Errorf("%v: %v", ErrNodeStartFailure, r)
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// send signal up to native app
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SendSignal(SignalEnvelope{
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Type: EventNodeCrashed,
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Event: NodeCrashEvent{
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Error: err.Error(),
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},
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})
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Fatalf(err) // os.exit(1) is called internally
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}
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}
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