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package node
import (
"bytes"
"math/rand"
"net"
"net/http"
"os"
"strconv"
"strings"
"time"
acm "github.com/tendermint/tendermint/account"
bc "github.com/tendermint/tendermint/blockchain"
. "github.com/tendermint/tendermint/common"
"github.com/tendermint/tendermint/consensus"
dbm "github.com/tendermint/tendermint/db"
"github.com/tendermint/tendermint/events"
mempl "github.com/tendermint/tendermint/mempool"
"github.com/tendermint/tendermint/p2p"
"github.com/tendermint/tendermint/rpc/core"
"github.com/tendermint/tendermint/rpc/server"
sm "github.com/tendermint/tendermint/state"
stypes "github.com/tendermint/tendermint/state/types"
"github.com/tendermint/tendermint/types"
"github.com/tendermint/tendermint/wire"
)
import _ "net/http/pprof"
type Node struct {
sw *p2p.Switch
evsw *events.EventSwitch
book *p2p.AddrBook
blockStore *bc.BlockStore
pexReactor *p2p.PEXReactor
bcReactor *bc.BlockchainReactor
mempoolReactor *mempl.MempoolReactor
consensusState *consensus.ConsensusState
consensusReactor *consensus.ConsensusReactor
privValidator *types.PrivValidator
genDoc *stypes.GenesisDoc
privKey acm.PrivKeyEd25519
}
func NewNode() *Node {
// Get BlockStore
blockStoreDB := dbm.GetDB("blockstore")
blockStore := bc.NewBlockStore(blockStoreDB)
// Get State
stateDB := dbm.GetDB("state")
state := sm.LoadState(stateDB)
var genDoc *stypes.GenesisDoc
if state == nil {
genDoc, state = sm.MakeGenesisStateFromFile(stateDB, config.GetString("genesis_file"))
state.Save()
// write the gendoc to db
buf, n, err := new(bytes.Buffer), new(int64), new(error)
wire.WriteJSON(genDoc, buf, n, err)
stateDB.Set(stypes.GenDocKey, buf.Bytes())
if *err != nil {
Exit(Fmt("Unable to write gendoc to db: %v", err))
}
} else {
genDocBytes := stateDB.Get(stypes.GenDocKey)
err := new(error)
wire.ReadJSONPtr(&genDoc, genDocBytes, err)
if *err != nil {
Exit(Fmt("Unable to read gendoc from db: %v", err))
}
}
// add the chainid to the global config
config.Set("chain_id", state.ChainID)
// Get PrivValidator
var privValidator *types.PrivValidator
privValidatorFile := config.GetString("priv_validator_file")
if _, err := os.Stat(privValidatorFile); err == nil {
privValidator = types.LoadPrivValidator(privValidatorFile)
log.Notice("Loaded PrivValidator",
"file", privValidatorFile, "privValidator", privValidator)
} else {
privValidator = types.GenPrivValidator()
privValidator.SetFile(privValidatorFile)
privValidator.Save()
log.Notice("Generated PrivValidator", "file", privValidatorFile)
}
// Generate node PrivKey
privKey := acm.GenPrivKeyEd25519()
// Make event switch
eventSwitch := events.NewEventSwitch()
_, err := eventSwitch.Start()
if err != nil {
Exit(Fmt("Failed to start switch: %v", err))
}
// Make PEXReactor
book := p2p.NewAddrBook(config.GetString("addrbook_file"))
pexReactor := p2p.NewPEXReactor(book)
// Make BlockchainReactor
bcReactor := bc.NewBlockchainReactor(state.Copy(), blockStore, config.GetBool("fast_sync"))
// Make MempoolReactor
mempool := mempl.NewMempool(state.Copy())
mempoolReactor := mempl.NewMempoolReactor(mempool)
// Make ConsensusReactor
consensusState := consensus.NewConsensusState(state.Copy(), blockStore, mempoolReactor)
consensusReactor := consensus.NewConsensusReactor(consensusState, blockStore, config.GetBool("fast_sync"))
if privValidator != nil {
consensusReactor.SetPrivValidator(privValidator)
}
// Make p2p network switch
sw := p2p.NewSwitch()
sw.AddReactor("PEX", pexReactor)
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
SetFireable(eventSwitch, pexReactor, bcReactor, mempoolReactor, consensusReactor)
return &Node{
sw: sw,
evsw: eventSwitch,
book: book,
blockStore: blockStore,
pexReactor: pexReactor,
bcReactor: bcReactor,
mempoolReactor: mempoolReactor,
consensusState: consensusState,
consensusReactor: consensusReactor,
privValidator: privValidator,
genDoc: genDoc,
privKey: privKey,
}
}
// Call Start() after adding the listeners.
func (n *Node) Start() error {
n.book.Start()
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()
n.book.Stop()
}
// Add the event switch to reactors, mempool, etc.
func SetFireable(evsw *events.EventSwitch, eventables ...events.Eventable) {
for _, e := range eventables {
e.SetFireable(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)
n.book.AddOurAddress(l.ExternalAddress())
}
// 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)
//n.book.MarkAttempt(addr)
return
} else {
log.Notice("Connected to seed", "peer", peer)
n.book.AddAddress(addr, addr)
}
}
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.SetGenDoc(n.genDoc)
listenAddr := config.GetString("rpc_laddr")
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 acm.PrivKeyEd25519) *types.NodeInfo {
nodeInfo := &types.NodeInfo{
PubKey: privKey.PubKey().(acm.PubKeyEd25519),
Moniker: config.GetString("moniker"),
ChainID: config.GetString("chain_id"),
Version: config.GetString("version"),
}
// include git hash in the nodeInfo if available
if rev, err := ReadFile(config.GetString("revisions_file")); err == nil {
nodeInfo.Revision = 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")
_, rpcPortStr, _ := net.SplitHostPort(rpcListenAddr)
rpcPort, err := strconv.Atoi(rpcPortStr)
if err != nil {
PanicSanity(Fmt("Expected numeric RPC.ListenAddr port but got %v", rpcPortStr))
}
// 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.Host = p2pHost
nodeInfo.P2PPort = p2pPort
nodeInfo.RPCPort = uint16(rpcPort)
return nodeInfo
}
//------------------------------------------------------------------------------
func RunNode() {
// Create & start node
n := NewNode()
l := p2p.NewDefaultListener("tcp", config.GetString("node_laddr"))
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()
})
}