package node import ( "bytes" "io/ioutil" "math/rand" "net" "net/http" "strings" "time" . "github.com/tendermint/go-common" "github.com/tendermint/go-crypto" dbm "github.com/tendermint/go-db" "github.com/tendermint/go-events" "github.com/tendermint/go-p2p" "github.com/tendermint/go-rpc" "github.com/tendermint/go-rpc/server" "github.com/tendermint/go-rpc/types" "github.com/tendermint/go-wire" bc "github.com/tendermint/tendermint/blockchain" "github.com/tendermint/tendermint/consensus" mempl "github.com/tendermint/tendermint/mempool" "github.com/tendermint/tendermint/proxy" "github.com/tendermint/tendermint/rpc/core" ctypes "github.com/tendermint/tendermint/rpc/core/types" sm "github.com/tendermint/tendermint/state" "github.com/tendermint/tendermint/types" "github.com/tendermint/tmsp/example/golang" ) import _ "net/http/pprof" type Node struct { sw *p2p.Switch evsw *events.EventSwitch blockStore *bc.BlockStore bcReactor *bc.BlockchainReactor mempoolReactor *mempl.MempoolReactor consensusState *consensus.ConsensusState consensusReactor *consensus.ConsensusReactor privValidator *types.PrivValidator genesisDoc *types.GenesisDoc privKey crypto.PrivKeyEd25519 } func NewNode(privValidator *types.PrivValidator) *Node { // Get BlockStore blockStoreDB := dbm.GetDB("blockstore") blockStore := bc.NewBlockStore(blockStoreDB) // Get State state := getState() // 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 to the global config config.Set("chain_id", state.ChainID) // 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)) } // Make BlockchainReactor bcReactor := bc.NewBlockchainReactor(state.Copy(), proxyAppConnConsensus, blockStore, config.GetBool("fast_sync")) // Make MempoolReactor mempool := mempl.NewMempool(proxyAppConnMempool) mempoolReactor := mempl.NewMempoolReactor(mempool) // Make ConsensusReactor consensusState := consensus.NewConsensusState(state.Copy(), proxyAppConnConsensus, blockStore, mempool) consensusReactor := consensus.NewConsensusReactor(consensusState, blockStore, config.GetBool("fast_sync")) if privValidator != nil { consensusReactor.SetPrivValidator(privValidator) } // Make p2p network switch sw := p2p.NewSwitch() 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{ sw: sw, evsw: eventSwitch, blockStore: blockStore, bcReactor: bcReactor, mempoolReactor: mempoolReactor, consensusState: consensusState, consensusReactor: consensusReactor, privValidator: privValidator, genesisDoc: state.GenesisDoc, privKey: privKey, } } // Call Start() after adding the listeners. func (n *Node) Start() error { n.sw.SetNodeInfo(makeNodeInfo(n.sw, n.privKey)) n.sw.SetNodePrivKey(n.privKey) _, err := n.sw.Start() return err } func (n *Node) Stop() { log.Notice("Stopping Node") // TODO: gracefully disconnect from peers. n.sw.Stop() } // Add the event switch to reactors, mempool, etc. func SetEventSwitch(evsw *events.EventSwitch, eventables ...events.Eventable) { for _, e := range eventables { e.SetEventSwitch(evsw) } } // Add a Listener to accept inbound peer connections. // Add listeners before starting the Node. // The first listener is the primary listener (in NodeInfo) func (n *Node) AddListener(l p2p.Listener) { log.Notice(Fmt("Added %v", l)) n.sw.AddListener(l) } // Dial a list of seeds in random order // Spawns a go routine for each dial func (n *Node) DialSeed() { // permute the list, dial them in random order. seeds := strings.Split(config.GetString("seeds"), ",") perm := rand.Perm(len(seeds)) for i := 0; i < len(perm); i++ { go func(i int) { time.Sleep(time.Duration(rand.Int63n(3000)) * time.Millisecond) j := perm[i] addr := p2p.NewNetAddressString(seeds[j]) n.dialSeed(addr) }(i) } } func (n *Node) dialSeed(addr *p2p.NetAddress) { peer, err := n.sw.DialPeerWithAddress(addr) if err != nil { log.Error("Error dialing seed", "error", err) return } else { log.Notice("Connected to seed", "peer", peer) } } func (n *Node) StartRPC() (net.Listener, error) { core.SetBlockStore(n.blockStore) core.SetConsensusState(n.consensusState) core.SetConsensusReactor(n.consensusReactor) core.SetMempoolReactor(n.mempoolReactor) core.SetSwitch(n.sw) core.SetPrivValidator(n.privValidator) core.SetGenesisDoc(n.genesisDoc) listenAddr := config.GetString("rpc_laddr") // register the result objects with wire // so consumers of tendermint rpc will not have // conflicts with their own rpc wire.RegisterInterface( struct{ rpctypes.Result }{}, wire.ConcreteType{&ctypes.TendermintResult{}, 0x1}, ) mux := http.NewServeMux() wm := rpcserver.NewWebsocketManager(core.Routes, n.evsw) mux.HandleFunc("/websocket", wm.WebsocketHandler) rpcserver.RegisterRPCFuncs(mux, core.Routes) return rpcserver.StartHTTPServer(listenAddr, mux) } func (n *Node) Switch() *p2p.Switch { return n.sw } func (n *Node) BlockStore() *bc.BlockStore { return n.blockStore } func (n *Node) ConsensusState() *consensus.ConsensusState { return n.consensusState } func (n *Node) MempoolReactor() *mempl.MempoolReactor { return n.mempoolReactor } func (n *Node) EventSwitch() *events.EventSwitch { return n.evsw } func makeNodeInfo(sw *p2p.Switch, privKey crypto.PrivKeyEd25519) *p2p.NodeInfo { nodeInfo := &p2p.NodeInfo{ PubKey: privKey.PubKey().(crypto.PubKeyEd25519), Moniker: config.GetString("moniker"), Network: config.GetString("chain_id"), Version: Version, Other: []string{ Fmt("p2p_version=%v", p2p.Version), Fmt("rpc_version=%v", rpc.Version), Fmt("wire_version=%v", wire.Version), }, } // include git hash in the nodeInfo if available if rev, err := ReadFile(config.GetString("revision_file")); err == nil { nodeInfo.Other = append(nodeInfo.Other, Fmt("revision=%v", string(rev))) } if !sw.IsListening() { return nodeInfo } p2pListener := sw.Listeners()[0] p2pHost := p2pListener.ExternalAddress().IP.String() p2pPort := p2pListener.ExternalAddress().Port rpcListenAddr := config.GetString("rpc_laddr") // We assume that the rpcListener has the same ExternalAddress. // This is probably true because both P2P and RPC listeners use UPnP, // except of course if the rpc is only bound to localhost nodeInfo.ListenAddr = Fmt("%v:%v", p2pHost, p2pPort) nodeInfo.Other = append(nodeInfo.Other, Fmt("rpc_addr=%v", rpcListenAddr)) return nodeInfo } //------------------------------------------------------------------------------ // 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) func RunNode() { // 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) config.Set("genesis_doc", genDoc) } } // Get PrivValidator privValidatorFile := config.GetString("priv_validator_file") privValidator := types.LoadOrGenPrivValidator(privValidatorFile) // Create & start node n := NewNode(privValidator) 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") != "" { n.DialSeed() } // 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() }) } // Load the most recent state from "state" db, // or create a new one (and save) from genesis. func getState() *sm.State { stateDB := dbm.GetDB("state") state := sm.LoadState(stateDB) if state == nil { state = sm.MakeGenesisStateFromFile(stateDB, config.GetString("genesis_file")) state.Save() } return state } // Get a connection to the proxyAppConn addr. // Check the current hash, and panic if it doesn't match. func getProxyApp(addr string, hash []byte) (proxyAppCtx proxy.AppContext) { // use local app (for testing) if addr == "local" { app := example.NewCounterApplication(true) appCtx := app.Open() proxyAppCtx = proxy.NewLocalAppContext(appCtx) } else { proxyConn, err := Connect(addr) if err != nil { Exit(Fmt("Failed to connect to proxy for mempool: %v", err)) } remoteApp := proxy.NewRemoteAppContext(proxyConn, 1024) remoteApp.Start() proxyAppCtx = remoteApp } // Check the hash currentHash, err := proxyAppConn.GetHashSync() if err != nil { PanicCrisis(Fmt("Error in getting proxyAppConn hash: %v", err)) } if !bytes.Equal(hash, currentHash) { PanicCrisis(Fmt("ProxyApp hash does not match. Expected %X, got %X", hash, currentHash)) } return proxyAppConn }