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func NewNode(config *cfg.Config,
privValidator types.PrivValidator,
nodeKey *p2p.NodeKey,
clientCreator proxy.ClientCreator,
genesisDocProvider GenesisDocProvider,
dbProvider DBProvider,
metricsProvider MetricsProvider,
logger log.Logger) (*Node, error) {
// 获取数据库blostore.db的操作对象
blockStoreDB, err := dbProvider(&DBContext{"blockstore", config})
if err != nil {
return nil, err
}
blockStore := bc.NewBlockStore(blockStoreDB)
// 获取状态数据库state.db的操作对象
stateDB, err := dbProvider(&DBContext{"state", config})
if err != nil {
return nil, err
}
// 读取最开始的系统配置状态
// 因为有可能state数据库刚创建，里面还没有状态信息
genDoc, err := loadGenesisDoc(stateDB)
if err != nil {
genDoc, err = genesisDocProvider()
if err != nil {
return nil, err
}
saveGenesisDoc(stateDB, genDoc)
}
// 如果数据库里面有状态，就读取系统状态，没有的话就使用创世区块的数据作为当前的状态
state, err := sm.LoadStateFromDBOrGenesisDoc(stateDB, genDoc)
if err != nil {
return nil, err
}
// 需要和我们自己的abci程序进行交互，也叫做proxyApp(代理app)
// 然后启动和我们abci的连接
proxyApp := proxy.NewAppConns(clientCreator)
proxyApp.SetLogger(logger.With("module", "proxy"))
if err := proxyApp.Start(); err != nil {
return nil, fmt.Errorf("Error starting proxy app connections: %v", err)
}
// 创建相关的握手过程，和我们的proxyApp程序通信
consensusLogger := logger.With("module", "consensus")
handshaker := cs.NewHandshaker(stateDB, state, blockStore, genDoc)
handshaker.SetLogger(consensusLogger)
if err := handshaker.Handshake(proxyApp); err != nil {
return nil, fmt.Errorf("Error during handshake: %v", err)
}
// 由于区块状态已经改变，因此我们需要重新加载下区块状态
state = sm.LoadState(stateDB)
// 相关日志忽略
...
// 如果本验证节点开启了socket连接，就需要开启监听
if config.PrivValidatorListenAddr != "" {
privValidator, err = createAndStartPrivValidatorSocketClient(config.PrivValidatorListenAddr, logger)
if err != nil {
return nil, errors.Wrap(err, "Error with private validator socket client")
}
}
// 是否开启快速同步
fastSync := config.FastSync
if state.Validators.Size() == 1 {
addr, _ := state.Validators.GetByIndex(0)
if bytes.Equal(privValidator.GetAddress(), addr) {
fastSync = false
}
}
...
// 创建共识，P2P以及内存池
csMetrics, p2pMetrics, memplMetrics, smMetrics := metricsProvider()
// 创建内存池
mempool := mempl.NewMempool(
config.Mempool,
proxyApp.Mempool(),
state.LastBlockHeight,
mempl.WithMetrics(memplMetrics),
mempl.WithPreCheck(sm.TxPreCheck(state)),
mempl.WithPostCheck(sm.TxPostCheck(state)),
)
mempoolLogger := logger.With("module", "mempool")
mempool.SetLogger(mempoolLogger)
if config.Mempool.WalEnabled() {
mempool.InitWAL() // no need to have the mempool wal during tests
}
mempoolReactor := mempl.NewMempoolReactor(config.Mempool, mempool)
mempoolReactor.SetLogger(mempoolLogger)
if config.Consensus.WaitForTxs() {
mempool.EnableTxsAvailable()
}
// 创建另一个数据库evidence.db
evidenceDB, err := dbProvider(&DBContext{"evidence", config})
if err != nil {
return nil, err
}
evidenceLogger := logger.With("module", "evidence")
evidenceStore := evidence.NewEvidenceStore(evidenceDB)
evidencePool := evidence.NewEvidencePool(stateDB, evidenceStore)
evidencePool.SetLogger(evidenceLogger)
evidenceReactor := evidence.NewEvidenceReactor(evidencePool)
evidenceReactor.SetLogger(evidenceLogger)
blockExecLogger := logger.With("module", "state")
// make block executor for consensus and blockchain reactors to execute blocks
blockExec := sm.NewBlockExecutor(
stateDB,
blockExecLogger,
proxyApp.Consensus(),
mempool,
evidencePool,
sm.BlockExecutorWithMetrics(smMetrics),
)
// Make BlockchainReactor
bcReactor := bc.NewBlockchainReactor(state.Copy(), blockExec, blockStore, fastSync)
bcReactor.SetLogger(logger.With("module", "blockchain"))
// Make ConsensusReactor
consensusState := cs.NewConsensusState(
config.Consensus,
state.Copy(),
blockExec,
blockStore,
mempool,
evidencePool,
cs.StateMetrics(csMetrics),
)
consensusState.SetLogger(consensusLogger)
if privValidator != nil {
consensusState.SetPrivValidator(privValidator)
}
consensusReactor := cs.NewConsensusReactor(consensusState, fastSync, cs.ReactorMetrics(csMetrics))
consensusReactor.SetLogger(consensusLogger)
eventBus := types.NewEventBus()
eventBus.SetLogger(logger.With("module", "events"))
// services which will be publishing and/or subscribing for messages (events)
// consensusReactor will set it on consensusState and blockExecutor
consensusReactor.SetEventBus(eventBus)
// Transaction indexing
var txIndexer txindex.TxIndexer
switch config.TxIndex.Indexer {
case "kv":
store, err := dbProvider(&DBContext{"tx_index", config})
if err != nil {
return nil, err
}
if config.TxIndex.IndexTags != "" {
txIndexer = kv.NewTxIndex(store, kv.IndexTags(splitAndTrimEmpty(config.TxIndex.IndexTags, ",", " ")))
} else if config.TxIndex.IndexAllTags {
txIndexer = kv.NewTxIndex(store, kv.IndexAllTags())
} else {
txIndexer = kv.NewTxIndex(store)
}
default:
txIndexer = &null.TxIndex{}
}
indexerService := txindex.NewIndexerService(txIndexer, eventBus)
indexerService.SetLogger(logger.With("module", "txindex"))
p2pLogger := logger.With("module", "p2p")
nodeInfo, err := makeNodeInfo(
config,
nodeKey.ID(),
txIndexer,
genDoc.ChainID,
p2p.NewProtocolVersion(
version.P2PProtocol, // global
state.Version.Consensus.Block,
state.Version.Consensus.App,
),
)
if err != nil {
return nil, err
}
// Setup Transport.
var (
mConnConfig = p2p.MConnConfig(config.P2P)
transport = p2p.NewMultiplexTransport(nodeInfo, *nodeKey, mConnConfig)
connFilters = []p2p.ConnFilterFunc{}
peerFilters = []p2p.PeerFilterFunc{}
)
if !config.P2P.AllowDuplicateIP {
connFilters = append(connFilters, p2p.ConnDuplicateIPFilter())
}
// Filter peers by addr or pubkey with an ABCI query.
// If the query return code is OK, add peer.
if config.FilterPeers {
connFilters = append(
connFilters,
// ABCI query for address filtering.
func(_ p2p.ConnSet, c net.Conn, _ []net.IP) error {
res, err := proxyApp.Query().QuerySync(abci.RequestQuery{
Path: fmt.Sprintf("/p2p/filter/addr/%s", c.RemoteAddr().String()),
})
if err != nil {
return err
}
if res.IsErr() {
return fmt.Errorf("Error querying abci app: %v", res)
}
return nil
},
)
peerFilters = append(
peerFilters,
// ABCI query for ID filtering.
func(_ p2p.IPeerSet, p p2p.Peer) error {
res, err := proxyApp.Query().QuerySync(abci.RequestQuery{
Path: fmt.Sprintf("/p2p/filter/id/%s", p.ID()),
})
if err != nil {
return err
}
if res.IsErr() {
return fmt.Errorf("Error querying abci app: %v", res)
}
return nil
},
)
}
p2p.MultiplexTransportConnFilters(connFilters...)(transport)
// Setup Switch.
sw := p2p.NewSwitch(
config.P2P,
transport,
p2p.WithMetrics(p2pMetrics),
p2p.SwitchPeerFilters(peerFilters...),
)
sw.SetLogger(p2pLogger)
sw.AddReactor("MEMPOOL", mempoolReactor)
sw.AddReactor("BLOCKCHAIN", bcReactor)
sw.AddReactor("CONSENSUS", consensusReactor)
sw.AddReactor("EVIDENCE", evidenceReactor)
sw.SetNodeInfo(nodeInfo)
sw.SetNodeKey(nodeKey)
p2pLogger.Info("P2P Node ID", "ID", nodeKey.ID(), "file", config.NodeKeyFile())
// Optionally, start the pex reactor
//
// TODO:
//
// We need to set Seeds and PersistentPeers on the switch,
// since it needs to be able to use these (and their DNS names)
// even if the PEX is off. We can include the DNS name in the NetAddress,
// but it would still be nice to have a clear list of the current "PersistentPeers"
// somewhere that we can return with net_info.
//
// If PEX is on, it should handle dialing the seeds. Otherwise the switch does it.
// Note we currently use the addrBook regardless at least for AddOurAddress
addrBook := pex.NewAddrBook(config.P2P.AddrBookFile(), config.P2P.AddrBookStrict)
// Add ourselves to addrbook to prevent dialing ourselves
addrBook.AddOurAddress(nodeInfo.NetAddress())
addrBook.SetLogger(p2pLogger.With("book", config.P2P.AddrBookFile()))
if config.P2P.PexReactor {
// TODO persistent peers ? so we can have their DNS addrs saved
pexReactor := pex.NewPEXReactor(addrBook,
&pex.PEXReactorConfig{
Seeds: splitAndTrimEmpty(config.P2P.Seeds, ",", " "),
SeedMode: config.P2P.SeedMode,
})
pexReactor.SetLogger(logger.With("module", "pex"))
sw.AddReactor("PEX", pexReactor)
}
sw.SetAddrBook(addrBook)
// 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,
transport: transport,
sw: sw,
addrBook: addrBook,
nodeInfo: nodeInfo,
nodeKey: nodeKey,
stateDB: stateDB,
blockStore: blockStore,
bcReactor: bcReactor,
mempoolReactor: mempoolReactor,
consensusState: consensusState,
consensusReactor: consensusReactor,
evidencePool: evidencePool,
proxyApp: proxyApp,
txIndexer: txIndexer,
indexerService: indexerService,
eventBus: eventBus,
}
node.BaseService = *cmn.NewBaseService(logger, "Node", node)
return node, nil
}
|
