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node.go
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package node
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"net"
"net/http"
"strings"
abci "github.com/tendermint/abci/types"
crypto "github.com/tendermint/go-crypto"
wire "github.com/tendermint/go-wire"
cmn "github.com/tendermint/tmlibs/common"
dbm "github.com/tendermint/tmlibs/db"
"github.com/tendermint/tmlibs/log"
bc "github.com/tendermint/tendermint/blockchain"
cfg "github.com/tendermint/tendermint/config"
"github.com/tendermint/tendermint/consensus"
mempl "github.com/tendermint/tendermint/mempool"
"github.com/tendermint/tendermint/p2p"
"github.com/tendermint/tendermint/proxy"
rpccore "github.com/tendermint/tendermint/rpc/core"
grpccore "github.com/tendermint/tendermint/rpc/grpc"
rpc "github.com/tendermint/tendermint/rpc/lib"
rpcserver "github.com/tendermint/tendermint/rpc/lib/server"
sm "github.com/tendermint/tendermint/state"
"github.com/tendermint/tendermint/state/txindex"
"github.com/tendermint/tendermint/state/txindex/kv"
"github.com/tendermint/tendermint/state/txindex/null"
"github.com/tendermint/tendermint/types"
"github.com/tendermint/tendermint/version"
_ "net/http/pprof"
)
//------------------------------------------------------------------------------
// DBContext specifies config information for loading a new DB.
type DBContext struct {
ID string
Config *cfg.Config
}
// DBProvider takes a DBContext and returns an instantiated DB.
type DBProvider func(*DBContext) (dbm.DB, error)
// DefaultDBProvider returns a database using the DBBackend and DBDir
// specified in the ctx.Config.
func DefaultDBProvider(ctx *DBContext) (dbm.DB, error) {
return dbm.NewDB(ctx.ID, ctx.Config.DBBackend, ctx.Config.DBDir()), nil
}
// GenesisDocProvider returns a GenesisDoc.
// It allows the GenesisDoc to be pulled from sources other than the
// filesystem, for instance from a distributed key-value store cluster.
type GenesisDocProvider func() (*types.GenesisDoc, error)
// DefaultGenesisDocProviderFunc returns a GenesisDocProvider that loads
// the GenesisDoc from the config.GenesisFile() on the filesystem.
func DefaultGenesisDocProviderFunc(config *cfg.Config) GenesisDocProvider {
return func() (*types.GenesisDoc, error) {
return types.GenesisDocFromFile(config.GenesisFile())
}
}
// NodeProvider takes a config and a logger and returns a ready to go Node.
type NodeProvider func(*cfg.Config, log.Logger) (*Node, error)
// DefaultNewNode returns a Tendermint node with default settings for the
// PrivValidator, ClientCreator, GenesisDoc, and DBProvider.
// It implements NodeProvider.
func DefaultNewNode(config *cfg.Config, logger log.Logger) (*Node, error) {
return NewNode(config,
types.LoadOrGenPrivValidatorFS(config.PrivValidatorFile()),
proxy.DefaultClientCreator(config.ProxyApp, config.ABCI, config.DBDir()),
DefaultGenesisDocProviderFunc(config),
DefaultDBProvider,
logger)
}
//------------------------------------------------------------------------------
// Node is the highest level interface to a full Tendermint node.
// It includes all configuration information and running services.
type Node struct {
cmn.BaseService
// config
config *cfg.Config
genesisDoc *types.GenesisDoc // initial validator set
privValidator types.PrivValidator // local node's validator key
// network
privKey crypto.PrivKeyEd25519 // local node's p2p key
sw *p2p.Switch // p2p connections
addrBook *p2p.AddrBook // known peers
// services
evsw types.EventSwitch // pub/sub for services
blockStore *bc.BlockStore // store the blockchain to disk
bcReactor *bc.BlockchainReactor // for fast-syncing
mempoolReactor *mempl.MempoolReactor // for gossipping transactions
consensusState *consensus.ConsensusState // latest consensus state
consensusReactor *consensus.ConsensusReactor // for participating in the consensus
proxyApp proxy.AppConns // connection to the application
rpcListeners []net.Listener // rpc servers
txIndexer txindex.TxIndexer
}
// NewNode returns a new, ready to go, Tendermint Node.
func NewNode(config *cfg.Config,
privValidator types.PrivValidator,
clientCreator proxy.ClientCreator,
genesisDocProvider GenesisDocProvider,
dbProvider DBProvider,
logger log.Logger) (*Node, error) {
// Get BlockStore
blockStoreDB, err := dbProvider(&DBContext{"blockstore", config})
if err != nil {
return nil, err
}
blockStore := bc.NewBlockStore(blockStoreDB)
consensusLogger := logger.With("module", "consensus")
stateLogger := logger.With("module", "state")
// Get State
stateDB, err := dbProvider(&DBContext{"state", config})
if err != nil {
return nil, err
}
// Get genesis doc
genDoc, err := loadGenesisDoc(stateDB)
if err != nil {
genDoc, err = genesisDocProvider()
if err != nil {
return nil, err
}
// save genesis doc to prevent a certain class of user errors (e.g. when it
// was changed, accidentally or not). Also good for audit trail.
saveGenesisDoc(stateDB, genDoc)
}
state := sm.LoadState(stateDB)
if state == nil {
state, err = sm.MakeGenesisState(stateDB, genDoc)
if err != nil {
return nil, err
}
state.Save()
}
state.SetLogger(stateLogger)
// Create the proxyApp, which manages connections (consensus, mempool, query)
// and sync tendermint and the app by replaying any necessary blocks
handshaker := consensus.NewHandshaker(state, blockStore)
handshaker.SetLogger(consensusLogger)
proxyApp := proxy.NewAppConns(clientCreator, handshaker)
proxyApp.SetLogger(logger.With("module", "proxy"))
if _, err := proxyApp.Start(); err != nil {
return nil, fmt.Errorf("Error starting proxy app connections: %v", err)
}
// reload the state (it may have been updated by the handshake)
state = sm.LoadState(stateDB)
state.SetLogger(stateLogger)
// Transaction indexing
var txIndexer txindex.TxIndexer
switch config.TxIndex {
case "kv":
store, err := dbProvider(&DBContext{"tx_index", config})
if err != nil {
return nil, err
}
txIndexer = kv.NewTxIndex(store)
default:
txIndexer = &null.TxIndex{}
}
state.TxIndexer = txIndexer
// Generate node PrivKey
privKey := crypto.GenPrivKeyEd25519()
// Make event switch
eventSwitch := types.NewEventSwitch()
eventSwitch.SetLogger(logger.With("module", "types"))
if _, err := eventSwitch.Start(); err != nil {
return nil, fmt.Errorf("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.FastSync
if state.Validators.Size() == 1 {
addr, _ := state.Validators.GetByIndex(0)
if bytes.Equal(privValidator.GetAddress(), addr) {
fastSync = false
}
}
// Log whether this node is a validator or an observer
if state.Validators.HasAddress(privValidator.GetAddress()) {
consensusLogger.Info("This node is a validator")
} else {
consensusLogger.Info("This node is not a validator")
}
// Make BlockchainReactor
bcReactor := bc.NewBlockchainReactor(state.Copy(), proxyApp.Consensus(), blockStore, fastSync)
bcReactor.SetLogger(logger.With("module", "blockchain"))
// Make MempoolReactor
mempoolLogger := logger.With("module", "mempool")
mempool := mempl.NewMempool(config.Mempool, proxyApp.Mempool(), state.LastBlockHeight)
mempool.SetLogger(mempoolLogger)
mempoolReactor := mempl.NewMempoolReactor(config.Mempool, mempool)
mempoolReactor.SetLogger(mempoolLogger)
if config.Consensus.WaitForTxs() {
mempool.EnableTxsAvailable()
}
// Make ConsensusReactor
consensusState := consensus.NewConsensusState(config.Consensus, state.Copy(), proxyApp.Consensus(), blockStore, mempool)
consensusState.SetLogger(consensusLogger)
if privValidator != nil {
consensusState.SetPrivValidator(privValidator)
}
consensusReactor := consensus.NewConsensusReactor(consensusState, fastSync)
consensusReactor.SetLogger(consensusLogger)
p2pLogger := logger.With("module", "p2p")
sw := p2p.NewSwitch(config.P2P)
sw.SetLogger(p2pLogger)
sw.AddReactor("MEMPOOL", mempoolReactor)
sw.AddReactor("BLOCKCHAIN", bcReactor)
sw.AddReactor("CONSENSUS", consensusReactor)
// Optionally, start the pex reactor
var addrBook *p2p.AddrBook
if config.P2P.PexReactor {
addrBook = p2p.NewAddrBook(config.P2P.AddrBookFile(), config.P2P.AddrBookStrict)
addrBook.SetLogger(p2pLogger.With("book", config.P2P.AddrBookFile()))
pexReactor := p2p.NewPEXReactor(addrBook)
pexReactor.SetLogger(p2pLogger)
sw.AddReactor("PEX", pexReactor)
}
// Filter peers by addr or pubkey with an ABCI query.
// If the query return code is OK, add peer.
// XXX: Query format subject to change
if config.FilterPeers {
// NOTE: addr is ip:port
sw.SetAddrFilter(func(addr net.Addr) error {
resQuery, err := proxyApp.Query().QuerySync(abci.RequestQuery{Path: cmn.Fmt("/p2p/filter/addr/%s", addr.String())})
if err != nil {
return err
}
if resQuery.Code.IsOK() {
return nil
}
return errors.New(resQuery.Code.String())
})
sw.SetPubKeyFilter(func(pubkey crypto.PubKeyEd25519) error {
resQuery, err := proxyApp.Query().QuerySync(abci.RequestQuery{Path: cmn.Fmt("/p2p/filter/pubkey/%X", pubkey.Bytes())})
if err != nil {
return err
}
if resQuery.Code.IsOK() {
return nil
}
return errors.New(resQuery.Code.String())
})
}
// add the event switch to all services
// they should all satisfy events.Eventable
SetEventSwitch(eventSwitch, bcReactor, mempoolReactor, consensusReactor)
// run the profile server
profileHost := config.ProfListenAddress
if profileHost != "" {
go func() {
logger.Error("Profile server", "err", http.ListenAndServe(profileHost, nil))
}()
}
node := &Node{
config: config,
genesisDoc: genDoc,
privValidator: privValidator,
privKey: privKey,
sw: sw,
addrBook: addrBook,
evsw: eventSwitch,
blockStore: blockStore,
bcReactor: bcReactor,
mempoolReactor: mempoolReactor,
consensusState: consensusState,
consensusReactor: consensusReactor,
proxyApp: proxyApp,
txIndexer: txIndexer,
}
node.BaseService = *cmn.NewBaseService(logger, "Node", node)
return node, nil
}
// OnStart starts the Node. It implements cmn.Service.
func (n *Node) OnStart() error {
// Run the RPC server first
// so we can eg. receive txs for the first block
if n.config.RPC.ListenAddress != "" {
listeners, err := n.startRPC()
if err != nil {
return err
}
n.rpcListeners = listeners
}
// Create & add listener
protocol, address := cmn.ProtocolAndAddress(n.config.P2P.ListenAddress)
l := p2p.NewDefaultListener(protocol, address, n.config.P2P.SkipUPNP, n.Logger.With("module", "p2p"))
n.sw.AddListener(l)
// Start the switch
n.sw.SetNodeInfo(n.makeNodeInfo())
n.sw.SetNodePrivKey(n.privKey)
_, err := n.sw.Start()
if err != nil {
return err
}
// If seeds exist, add them to the address book and dial out
if n.config.P2P.Seeds != "" {
// dial out
seeds := strings.Split(n.config.P2P.Seeds, ",")
if err := n.DialSeeds(seeds); err != nil {
return err
}
}
return nil
}
// OnStop stops the Node. It implements cmn.Service.
func (n *Node) OnStop() {
n.BaseService.OnStop()
n.Logger.Info("Stopping Node")
// TODO: gracefully disconnect from peers.
n.sw.Stop()
for _, l := range n.rpcListeners {
n.Logger.Info("Closing rpc listener", "listener", l)
if err := l.Close(); err != nil {
n.Logger.Error("Error closing listener", "listener", l, "err", err)
}
}
}
// RunForever waits for an interupt signal and stops the node.
func (n *Node) RunForever() {
// Sleep forever and then...
cmn.TrapSignal(func() {
n.Stop()
})
}
// SetEventSwitch adds the event switch to reactors, mempool, etc.
func SetEventSwitch(evsw types.EventSwitch, eventables ...types.Eventable) {
for _, e := range eventables {
e.SetEventSwitch(evsw)
}
}
// AddListener adds a listener to accept inbound peer connections.
// It should be called before starting the Node.
// The first listener is the primary listener (in NodeInfo)
func (n *Node) AddListener(l p2p.Listener) {
n.sw.AddListener(l)
}
// ConfigureRPC sets all variables in rpccore so they will serve
// rpc calls from this node
func (n *Node) ConfigureRPC() {
rpccore.SetEventSwitch(n.evsw)
rpccore.SetBlockStore(n.blockStore)
rpccore.SetConsensusState(n.consensusState)
rpccore.SetMempool(n.mempoolReactor.Mempool)
rpccore.SetSwitch(n.sw)
rpccore.SetPubKey(n.privValidator.GetPubKey())
rpccore.SetGenesisDoc(n.genesisDoc)
rpccore.SetAddrBook(n.addrBook)
rpccore.SetProxyAppQuery(n.proxyApp.Query())
rpccore.SetTxIndexer(n.txIndexer)
rpccore.SetConsensusReactor(n.consensusReactor)
rpccore.SetLogger(n.Logger.With("module", "rpc"))
}
func (n *Node) startRPC() ([]net.Listener, error) {
n.ConfigureRPC()
listenAddrs := strings.Split(n.config.RPC.ListenAddress, ",")
if n.config.RPC.Unsafe {
rpccore.AddUnsafeRoutes()
}
// we may expose the rpc over both a unix and tcp socket
listeners := make([]net.Listener, len(listenAddrs))
for i, listenAddr := range listenAddrs {
mux := http.NewServeMux()
rpcLogger := n.Logger.With("module", "rpc-server")
wm := rpcserver.NewWebsocketManager(rpccore.Routes, n.evsw)
wm.SetLogger(rpcLogger.With("protocol", "websocket"))
mux.HandleFunc("/websocket", wm.WebsocketHandler)
rpcserver.RegisterRPCFuncs(mux, rpccore.Routes, rpcLogger)
listener, err := rpcserver.StartHTTPServer(listenAddr, mux, rpcLogger)
if err != nil {
return nil, err
}
listeners[i] = listener
}
// we expose a simplified api over grpc for convenience to app devs
grpcListenAddr := n.config.RPC.GRPCListenAddress
if grpcListenAddr != "" {
listener, err := grpccore.StartGRPCServer(grpcListenAddr)
if err != nil {
return nil, err
}
listeners = append(listeners, listener)
}
return listeners, nil
}
// Switch returns the Node's Switch.
func (n *Node) Switch() *p2p.Switch {
return n.sw
}
// BlockStore returns the Node's BlockStore.
func (n *Node) BlockStore() *bc.BlockStore {
return n.blockStore
}
// ConsensusState returns the Node's ConsensusState.
func (n *Node) ConsensusState() *consensus.ConsensusState {
return n.consensusState
}
// ConsensusReactor returns the Node's ConsensusReactor.
func (n *Node) ConsensusReactor() *consensus.ConsensusReactor {
return n.consensusReactor
}
// MempoolReactor returns the Node's MempoolReactor.
func (n *Node) MempoolReactor() *mempl.MempoolReactor {
return n.mempoolReactor
}
// EventSwitch returns the Node's EventSwitch.
func (n *Node) EventSwitch() types.EventSwitch {
return n.evsw
}
// PrivValidator returns the Node's PrivValidator.
// XXX: for convenience only!
func (n *Node) PrivValidator() types.PrivValidator {
return n.privValidator
}
// GenesisDoc returns the Node's GenesisDoc.
func (n *Node) GenesisDoc() *types.GenesisDoc {
return n.genesisDoc
}
// ProxyApp returns the Node's AppConns, representing its connections to the ABCI application.
func (n *Node) ProxyApp() proxy.AppConns {
return n.proxyApp
}
func (n *Node) makeNodeInfo() *p2p.NodeInfo {
txIndexerStatus := "on"
if _, ok := n.txIndexer.(*null.TxIndex); ok {
txIndexerStatus = "off"
}
nodeInfo := &p2p.NodeInfo{
PubKey: n.privKey.PubKey().Unwrap().(crypto.PubKeyEd25519),
Moniker: n.config.Moniker,
Network: n.genesisDoc.ChainID,
Version: version.Version,
Other: []string{
cmn.Fmt("wire_version=%v", wire.Version),
cmn.Fmt("p2p_version=%v", p2p.Version),
cmn.Fmt("consensus_version=%v", consensus.Version),
cmn.Fmt("rpc_version=%v/%v", rpc.Version, rpccore.Version),
cmn.Fmt("tx_index=%v", txIndexerStatus),
},
}
// include git hash in the nodeInfo if available
// TODO: use ld-flags
/*if rev, err := cmn.ReadFile(n.config.GetString("revision_file")); err == nil {
nodeInfo.Other = append(nodeInfo.Other, cmn.Fmt("revision=%v", string(rev)))
}*/
if !n.sw.IsListening() {
return nodeInfo
}
p2pListener := n.sw.Listeners()[0]
p2pHost := p2pListener.ExternalAddress().IP.String()
p2pPort := p2pListener.ExternalAddress().Port
rpcListenAddr := n.config.RPC.ListenAddress
// 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 = cmn.Fmt("%v:%v", p2pHost, p2pPort)
nodeInfo.Other = append(nodeInfo.Other, cmn.Fmt("rpc_addr=%v", rpcListenAddr))
return nodeInfo
}
//------------------------------------------------------------------------------
// NodeInfo returns the Node's Info from the Switch.
func (n *Node) NodeInfo() *p2p.NodeInfo {
return n.sw.NodeInfo()
}
// DialSeeds dials the given seeds on the Switch.
func (n *Node) DialSeeds(seeds []string) error {
return n.sw.DialSeeds(n.addrBook, seeds)
}
//------------------------------------------------------------------------------
var (
genesisDocKey = []byte("genesisDoc")
)
// panics if failed to unmarshal bytes
func loadGenesisDoc(db dbm.DB) (*types.GenesisDoc, error) {
bytes := db.Get(genesisDocKey)
if len(bytes) == 0 {
return nil, errors.New("Genesis doc not found")
} else {
var genDoc *types.GenesisDoc
err := json.Unmarshal(bytes, &genDoc)
if err != nil {
cmn.PanicCrisis(fmt.Sprintf("Failed to load genesis doc due to unmarshaling error: %v (bytes: %X)", err, bytes))
}
return genDoc, nil
}
}
// panics if failed to marshal the given genesis document
func saveGenesisDoc(db dbm.DB, genDoc *types.GenesisDoc) {
bytes, err := json.Marshal(genDoc)
if err != nil {
cmn.PanicCrisis(fmt.Sprintf("Failed to save genesis doc due to marshaling error: %v", err))
}
db.SetSync(genesisDocKey, bytes)
}