// Users wishing to use an external signer for their validators
// should fork tendermint/tendermint and implement RunNode to
// load their custom priv validator and call NewNode(privVal, getProxyFunc)
func RunNode(config cfg.Config) {
// Wait until the genesis doc becomes available
genDocFile := config.GetString("genesis_file")
if !FileExists(genDocFile) {
log.Notice(Fmt("Waiting for genesis file %v...", genDocFile))
for {
time.Sleep(time.Second)
if !FileExists(genDocFile) {
continue
}
jsonBlob, err := ioutil.ReadFile(genDocFile)
if err != nil {
Exit(Fmt("Couldn't read GenesisDoc file: %v", err))
}
genDoc := types.GenesisDocFromJSON(jsonBlob)
if genDoc.ChainID == "" {
PanicSanity(Fmt("Genesis doc %v must include non-empty chain_id", genDocFile))
}
config.Set("chain_id", genDoc.ChainID)
}
}
// Get PrivValidator
privValidatorFile := config.GetString("priv_validator_file")
privValidator := types.LoadOrGenPrivValidator(privValidatorFile)
// Create & start node
n := NewNode(config, privValidator, GetProxyApp)
l := p2p.NewDefaultListener("tcp", config.GetString("node_laddr"), config.GetBool("skip_upnp"))
n.AddListener(l)
err := n.Start()
if err != nil {
Exit(Fmt("Failed to start node: %v", err))
}
log.Notice("Started node", "nodeInfo", n.sw.NodeInfo())
// If seedNode is provided by config, dial out.
if config.GetString("seeds") != "" {
seeds := strings.Split(config.GetString("seeds"), ",")
n.sw.DialSeeds(seeds)
}
// Run the RPC server.
if config.GetString("rpc_laddr") != "" {
_, err := n.StartRPC()
if err != nil {
PanicCrisis(err)
}
}
// Sleep forever and then...
TrapSignal(func() {
n.Stop()
})
}
func parseFlags(config cfg.Config, args []string) {
var (
printHelp bool
moniker string
nodeLaddr string
seeds string
fastSync bool
skipUPNP bool
rpcLaddr string
logLevel string
proxyApp string
)
// Declare flags
var flags = flag.NewFlagSet("main", flag.ExitOnError)
flags.BoolVar(&printHelp, "help", false, "Print this help message.")
flags.StringVar(&moniker, "moniker", config.GetString("moniker"), "Node Name")
flags.StringVar(&nodeLaddr, "node_laddr", config.GetString("node_laddr"), "Node listen address. (0.0.0.0:0 means any interface, any port)")
flags.StringVar(&seeds, "seeds", config.GetString("seeds"), "Comma delimited host:port seed nodes")
flags.BoolVar(&fastSync, "fast_sync", config.GetBool("fast_sync"), "Fast blockchain syncing")
flags.BoolVar(&skipUPNP, "skip_upnp", config.GetBool("skip_upnp"), "Skip UPNP configuration")
flags.StringVar(&rpcLaddr, "rpc_laddr", config.GetString("rpc_laddr"), "RPC listen address. Port required")
flags.StringVar(&logLevel, "log_level", config.GetString("log_level"), "Log level")
flags.StringVar(&proxyApp, "proxy_app", config.GetString("proxy_app"),
"Proxy app address, or 'nilapp' or 'dummy' for local testing.")
flags.Parse(args)
if printHelp {
flags.PrintDefaults()
os.Exit(0)
}
// Merge parsed flag values onto app.
config.Set("moniker", moniker)
config.Set("node_laddr", nodeLaddr)
config.Set("seeds", seeds)
config.Set("fast_sync", fastSync)
config.Set("skip_upnp", skipUPNP)
config.Set("rpc_laddr", rpcLaddr)
config.Set("log_level", logLevel)
config.Set("proxy_app", proxyApp)
}
func NewNode(config cfg.Config, privValidator *types.PrivValidator, getProxyApp func(proxyAddr string, appHash []byte) proxy.AppConn) *Node {
EnsureDir(config.GetString("db_dir"), 0700) // incase we use memdb, cswal still gets written here
// Get BlockStore
blockStoreDB := dbm.NewDB("blockstore", config.GetString("db_backend"), config.GetString("db_dir"))
blockStore := bc.NewBlockStore(blockStoreDB)
// Get State db
stateDB := dbm.NewDB("state", config.GetString("db_backend"), config.GetString("db_dir"))
// Get State
state := getState(config, stateDB)
// Create two proxyAppConn connections,
// one for the consensus and one for the mempool.
proxyAddr := config.GetString("proxy_app")
proxyAppConnMempool := getProxyApp(proxyAddr, state.AppHash)
proxyAppConnConsensus := getProxyApp(proxyAddr, state.AppHash)
// add the chainid and number of validators to the global config
config.Set("chain_id", state.ChainID)
config.Set("num_vals", state.Validators.Size())
// Generate node PrivKey
privKey := crypto.GenPrivKeyEd25519()
// Make event switch
eventSwitch := events.NewEventSwitch()
_, err := eventSwitch.Start()
if err != nil {
Exit(Fmt("Failed to start switch: %v", err))
}
// Decide whether to fast-sync or not
// We don't fast-sync when the only validator is us.
fastSync := config.GetBool("fast_sync")
if state.Validators.Size() == 1 {
addr, _ := state.Validators.GetByIndex(0)
if bytes.Equal(privValidator.Address, addr) {
fastSync = false
}
}
// Make BlockchainReactor
bcReactor := bc.NewBlockchainReactor(state.Copy(), proxyAppConnConsensus, blockStore, fastSync)
// Make MempoolReactor
mempool := mempl.NewMempool(config, proxyAppConnMempool)
mempoolReactor := mempl.NewMempoolReactor(config, mempool)
// Make ConsensusReactor
consensusState := consensus.NewConsensusState(config, state.Copy(), proxyAppConnConsensus, blockStore, mempool)
consensusReactor := consensus.NewConsensusReactor(consensusState, blockStore, fastSync)
if privValidator != nil {
consensusReactor.SetPrivValidator(privValidator)
}
// deterministic accountability
err = consensusState.OpenWAL(config.GetString("cswal"))
if err != nil {
log.Error("Failed to open cswal", "error", err.Error())
}
// Make p2p network switch
sw := p2p.NewSwitch(config)
sw.AddReactor("MEMPOOL", mempoolReactor)
sw.AddReactor("BLOCKCHAIN", bcReactor)
sw.AddReactor("CONSENSUS", consensusReactor)
// add the event switch to all services
// they should all satisfy events.Eventable
SetEventSwitch(eventSwitch, bcReactor, mempoolReactor, consensusReactor)
// run the profile server
profileHost := config.GetString("prof_laddr")
if profileHost != "" {
go func() {
log.Warn("Profile server", "error", http.ListenAndServe(profileHost, nil))
}()
}
return &Node{
config: config,
sw: sw,
evsw: eventSwitch,
blockStore: blockStore,
bcReactor: bcReactor,
mempoolReactor: mempoolReactor,
consensusState: consensusState,
consensusReactor: consensusReactor,
privValidator: privValidator,
genesisDoc: state.GenesisDoc,
privKey: privKey,
}
}