package master import ( "bytes" "context" "crypto/rand" "encoding/hex" "io" "math/big" "sync" "time" "github.com/mr-tron/base58" "github.com/pkg/errors" "go.uber.org/zap" "google.golang.org/grpc" "source.quilibrium.com/quilibrium/monorepo/node/config" "source.quilibrium.com/quilibrium/monorepo/node/consensus" qtime "source.quilibrium.com/quilibrium/monorepo/node/consensus/time" "source.quilibrium.com/quilibrium/monorepo/node/crypto" "source.quilibrium.com/quilibrium/monorepo/node/execution" "source.quilibrium.com/quilibrium/monorepo/node/keys" "source.quilibrium.com/quilibrium/monorepo/node/p2p" "source.quilibrium.com/quilibrium/monorepo/node/protobufs" "source.quilibrium.com/quilibrium/monorepo/node/store" ) type SyncStatusType int const ( SyncStatusNotSyncing = iota SyncStatusAwaitingResponse SyncStatusSynchronizing ) type MasterClockConsensusEngine struct { *protobufs.UnimplementedValidationServiceServer difficulty uint32 logger *zap.Logger state consensus.EngineState pubSub p2p.PubSub keyManager keys.KeyManager frameProver crypto.FrameProver lastFrameReceivedAt time.Time frameChan chan *protobufs.ClockFrame executionEngines map[string]execution.ExecutionEngine filter []byte input []byte syncingStatus SyncStatusType syncingTarget []byte engineMx sync.Mutex seenFramesMx sync.Mutex historicFramesMx sync.Mutex seenFrames []*protobufs.ClockFrame historicFrames []*protobufs.ClockFrame clockStore store.ClockStore masterTimeReel *qtime.MasterTimeReel report *protobufs.SelfTestReport peerMapMx sync.RWMutex peerMap map[string]*protobufs.SelfTestReport frameValidationCh chan *protobufs.ClockFrame bandwidthTestCh chan []byte currentReceivingSyncPeers int currentReceivingSyncPeersMx sync.Mutex } var _ consensus.ConsensusEngine = (*MasterClockConsensusEngine)(nil) func NewMasterClockConsensusEngine( engineConfig *config.EngineConfig, logger *zap.Logger, clockStore store.ClockStore, keyManager keys.KeyManager, pubSub p2p.PubSub, frameProver crypto.FrameProver, masterTimeReel *qtime.MasterTimeReel, report *protobufs.SelfTestReport, ) *MasterClockConsensusEngine { if logger == nil { panic(errors.New("logger is nil")) } if engineConfig == nil { panic(errors.New("engine config is nil")) } if keyManager == nil { panic(errors.New("key manager is nil")) } if pubSub == nil { panic(errors.New("pubsub is nil")) } if frameProver == nil { panic(errors.New("frame prover is nil")) } if masterTimeReel == nil { panic(errors.New("master time reel is nil")) } seed, err := hex.DecodeString(engineConfig.GenesisSeed) if err != nil { panic(errors.New("genesis seed is nil")) } e := &MasterClockConsensusEngine{ difficulty: 10000, logger: logger, state: consensus.EngineStateStopped, keyManager: keyManager, pubSub: pubSub, executionEngines: map[string]execution.ExecutionEngine{}, frameChan: make(chan *protobufs.ClockFrame), input: seed, lastFrameReceivedAt: time.Time{}, syncingStatus: SyncStatusNotSyncing, clockStore: clockStore, frameProver: frameProver, masterTimeReel: masterTimeReel, report: report, peerMap: map[string]*protobufs.SelfTestReport{}, frameValidationCh: make(chan *protobufs.ClockFrame, 10), bandwidthTestCh: make(chan []byte), } e.peerMap[string(e.pubSub.GetPeerID())] = report if e.filter, err = hex.DecodeString(engineConfig.Filter); err != nil { panic(errors.Wrap(err, "could not parse filter value")) } logger.Info("constructing consensus engine") return e } func (e *MasterClockConsensusEngine) Start() <-chan error { e.logger.Info("starting master consensus engine") e.state = consensus.EngineStateStarting errChan := make(chan error) e.state = consensus.EngineStateLoading e.logger.Info("syncing last seen state") err := e.masterTimeReel.Start() if err != nil { panic(err) } frame, err := e.masterTimeReel.Head() if err != nil { panic(err) } e.buildHistoricFrameCache(frame) go func() { for { select { case newFrame := <-e.frameValidationCh: if err := e.frameProver.VerifyMasterClockFrame(newFrame); err != nil { e.logger.Error("could not verify clock frame", zap.Error(err)) continue } e.masterTimeReel.Insert(newFrame) case peerId := <-e.bandwidthTestCh: e.performBandwidthTest(peerId) } } }() e.logger.Info("subscribing to pubsub messages") e.pubSub.Subscribe(e.filter, e.handleMessage, true) e.state = consensus.EngineStateCollecting go func() { server := grpc.NewServer( grpc.MaxSendMsgSize(600*1024*1024), grpc.MaxRecvMsgSize(600*1024*1024), ) protobufs.RegisterValidationServiceServer(server, e) if err := e.pubSub.StartDirectChannelListener( e.pubSub.GetPeerID(), "validation", server, ); err != nil { panic(err) } }() go func() { for { e.logger.Info( "peers in store", zap.Int("peer_store_count", e.pubSub.GetPeerstoreCount()), zap.Int("network_peer_count", e.pubSub.GetNetworkPeersCount()), ) time.Sleep(10 * time.Second) } }() go func() { // Let it sit until we at least have a few more peers inbound time.Sleep(30 * time.Second) for { e.logger.Info("broadcasting self-test info") head, err := e.masterTimeReel.Head() if err != nil { panic(err) } e.report.MasterHeadFrame = head.FrameNumber if err := e.publishMessage(e.filter, e.report); err != nil { e.logger.Debug("error publishing message", zap.Error(err)) } time.Sleep(30 * time.Minute) } }() go func() { newFrameCh := e.masterTimeReel.NewFrameCh() for e.state < consensus.EngineStateStopping { var err error select { case frame := <-newFrameCh: currentFrame := frame latestFrame := frame if latestFrame, err = e.collect(currentFrame); err != nil { e.logger.Error("could not collect", zap.Error(err)) latestFrame = currentFrame continue } if latestFrame, err = e.prove(latestFrame); err != nil { e.logger.Error("could not prove", zap.Error(err)) latestFrame = currentFrame } if err = e.publishProof(latestFrame); err != nil { e.logger.Error("could not publish", zap.Error(err)) } case <-time.After(20 * time.Second): frame, err := e.masterTimeReel.Head() if err != nil { panic(err) } if frame, err = e.prove(frame); err != nil { e.logger.Error("could not prove", zap.Error(err)) continue } if err = e.publishProof(frame); err != nil { e.logger.Error("could not publish", zap.Error(err)) } } } }() go func() { errChan <- nil }() return errChan } func (e *MasterClockConsensusEngine) PerformValidation( ctx context.Context, msg *protobufs.ValidationMessage, ) (*protobufs.ValidationMessage, error) { return msg, nil } func (e *MasterClockConsensusEngine) Stop(force bool) <-chan error { e.logger.Info("stopping consensus engine") e.state = consensus.EngineStateStopping errChan := make(chan error) wg := sync.WaitGroup{} wg.Add(len(e.executionEngines)) for name := range e.executionEngines { name := name go func(name string) { frame, err := e.masterTimeReel.Head() if err != nil { errChan <- err return } err = <-e.UnregisterExecutor(name, frame.FrameNumber, force) if err != nil { errChan <- err } wg.Done() }(name) } e.logger.Info("waiting for execution engines to stop") wg.Wait() e.logger.Info("execution engines stopped") e.masterTimeReel.Stop() e.state = consensus.EngineStateStopped go func() { errChan <- nil }() return errChan } func (e *MasterClockConsensusEngine) performBandwidthTest(peerID []byte) { result := e.pubSub.GetMultiaddrOfPeer(peerID) if result == "" { go func() { e.bandwidthTestCh <- peerID }() return } cc, err := e.pubSub.GetDirectChannel(peerID, "validation") if err != nil { e.logger.Info( "could not connect for validation", zap.String("peer_id", base58.Encode(peerID)), ) // tag: dusk – nuke this peer for now e.pubSub.SetPeerScore(peerID, -1000) return } client := protobufs.NewValidationServiceClient(cc) verification := make([]byte, 1048576) rand.Read(verification) start := time.Now().UnixMilli() validation, err := client.PerformValidation( context.Background(), &protobufs.ValidationMessage{ Validation: verification, }, ) end := time.Now().UnixMilli() if err != nil && err != io.EOF { cc.Close() e.logger.Info( "peer returned error", zap.String("peer_id", base58.Encode(peerID)), zap.Error(err), ) // tag: dusk – nuke this peer for now e.pubSub.SetPeerScore(peerID, -1000) return } cc.Close() if !bytes.Equal(verification, validation.Validation) { e.logger.Info( "provided invalid verification", zap.String("peer_id", base58.Encode(peerID)), ) // tag: dusk – nuke this peer for now e.pubSub.SetPeerScore(peerID, -1000) return } if end-start > 2000 { e.logger.Info( "slow bandwidth, scoring out", zap.String("peer_id", base58.Encode(peerID)), ) // tag: dusk – nuke this peer for now e.pubSub.SetPeerScore(peerID, -1000) return } } func ( e *MasterClockConsensusEngine, ) GetPeerManifests() *protobufs.PeerManifestsResponse { response := &protobufs.PeerManifestsResponse{ PeerManifests: []*protobufs.PeerManifest{}, } e.peerMapMx.Lock() for peerId, peerManifest := range e.peerMap { peerId := peerId peerManifest := peerManifest manifest := &protobufs.PeerManifest{ PeerId: []byte(peerId), Difficulty: peerManifest.Difficulty, DifficultyMetric: peerManifest.DifficultyMetric, Commit_16Metric: peerManifest.Commit_16Metric, Commit_128Metric: peerManifest.Commit_128Metric, Commit_1024Metric: peerManifest.Commit_1024Metric, Commit_65536Metric: peerManifest.Commit_65536Metric, Proof_16Metric: peerManifest.Proof_16Metric, Proof_128Metric: peerManifest.Proof_128Metric, Proof_1024Metric: peerManifest.Proof_1024Metric, Proof_65536Metric: peerManifest.Proof_65536Metric, Cores: peerManifest.Cores, Memory: new(big.Int).SetBytes(peerManifest.Memory).Bytes(), Storage: new(big.Int).SetBytes(peerManifest.Storage).Bytes(), MasterHeadFrame: peerManifest.MasterHeadFrame, } for _, capability := range peerManifest.Capabilities { metadata := make([]byte, len(capability.AdditionalMetadata)) copy(metadata[:], capability.AdditionalMetadata[:]) manifest.Capabilities = append( manifest.Capabilities, &protobufs.Capability{ ProtocolIdentifier: capability.ProtocolIdentifier, AdditionalMetadata: metadata, }, ) } response.PeerManifests = append( response.PeerManifests, manifest, ) } e.peerMapMx.Unlock() return response } func (e *MasterClockConsensusEngine) GetDifficulty() uint32 { return e.difficulty } func (e *MasterClockConsensusEngine) GetFrame() *protobufs.ClockFrame { frame, err := e.masterTimeReel.Head() if err != nil { panic(err) } return frame } func (e *MasterClockConsensusEngine) GetState() consensus.EngineState { return e.state } func ( e *MasterClockConsensusEngine, ) GetFrameChannel() <-chan *protobufs.ClockFrame { return e.frameChan } func (e *MasterClockConsensusEngine) buildHistoricFrameCache( latestFrame *protobufs.ClockFrame, ) { e.historicFrames = []*protobufs.ClockFrame{} if latestFrame.FrameNumber != 0 { min := uint64(0) if latestFrame.FrameNumber-255 > min && latestFrame.FrameNumber > 255 { min = latestFrame.FrameNumber - 255 } iter, err := e.clockStore.RangeMasterClockFrames( e.filter, min, latestFrame.FrameNumber-1, ) if err != nil { panic(err) } for iter.First(); iter.Valid(); iter.Next() { frame, err := iter.Value() if err != nil { panic(err) } e.historicFrames = append(e.historicFrames, frame) } if err = iter.Close(); err != nil { panic(err) } } e.historicFrames = append(e.historicFrames, latestFrame) }