package ceremony import ( "bytes" "crypto" "crypto/rand" "encoding/binary" "encoding/hex" "strings" "sync" "github.com/iden3/go-iden3-crypto/poseidon" "github.com/pkg/errors" "go.uber.org/zap" "golang.org/x/sync/errgroup" "google.golang.org/protobuf/proto" "google.golang.org/protobuf/types/known/anypb" "source.quilibrium.com/quilibrium/monorepo/nekryptology/pkg/core/curves" "source.quilibrium.com/quilibrium/monorepo/node/config" "source.quilibrium.com/quilibrium/monorepo/node/consensus/ceremony" qcrypto "source.quilibrium.com/quilibrium/monorepo/node/crypto" "source.quilibrium.com/quilibrium/monorepo/node/execution" "source.quilibrium.com/quilibrium/monorepo/node/execution/ceremony/application" "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 CeremonyExecutionEngine struct { logger *zap.Logger clock *ceremony.CeremonyDataClockConsensusEngine clockStore store.ClockStore keyStore store.KeyStore keyManager keys.KeyManager engineConfig *config.EngineConfig pubSub p2p.PubSub provingKey crypto.Signer proverPublicKey []byte provingKeyAddress []byte participantMx sync.Mutex peerChannels map[string]*p2p.PublicP2PChannel activeSecrets []curves.Scalar activeClockFrame *protobufs.ClockFrame alreadyPublishedShare bool alreadyPublishedTranscript bool seenMessageMap map[string]bool seenMessageMx sync.Mutex } func NewCeremonyExecutionEngine( logger *zap.Logger, clock *ceremony.CeremonyDataClockConsensusEngine, engineConfig *config.EngineConfig, keyManager keys.KeyManager, pubSub p2p.PubSub, clockStore store.ClockStore, keyStore store.KeyStore, ) *CeremonyExecutionEngine { if logger == nil { panic(errors.New("logger is nil")) } e := &CeremonyExecutionEngine{ logger: logger, clock: clock, engineConfig: engineConfig, keyManager: keyManager, clockStore: clockStore, keyStore: keyStore, pubSub: pubSub, participantMx: sync.Mutex{}, peerChannels: map[string]*p2p.PublicP2PChannel{}, alreadyPublishedShare: false, seenMessageMx: sync.Mutex{}, seenMessageMap: map[string]bool{}, } provingKey, _, publicKeyBytes, provingKeyAddress := e.clock.GetProvingKey( engineConfig, ) e.provingKey = provingKey e.proverPublicKey = publicKeyBytes e.provingKeyAddress = provingKeyAddress return e } var _ execution.ExecutionEngine = (*CeremonyExecutionEngine)(nil) // GetName implements ExecutionEngine func (*CeremonyExecutionEngine) GetName() string { return "ceremony" } // GetSupportedApplications implements ExecutionEngine func ( *CeremonyExecutionEngine, ) GetSupportedApplications() []*protobufs.Application { return []*protobufs.Application{ { Address: application.CEREMONY_ADDRESS, ExecutionContext: protobufs.ExecutionContext_EXECUTION_CONTEXT_INTRINSIC, }, } } // Start implements ExecutionEngine func (e *CeremonyExecutionEngine) Start() <-chan error { errChan := make(chan error) e.logger.Info("ceremony data loaded", zap.Binary( "g2_power", qcrypto.CeremonyBLS48581G2[1].ToAffineCompressed(), )) go func() { seed, err := hex.DecodeString(e.engineConfig.GenesisSeed) if err != nil { panic(err) } err = <-e.clock.Start( application.CEREMONY_ADDRESS, seed, ) if err != nil { panic(err) } err = <-e.clock.RegisterExecutor(e, 0) if err != nil { panic(err) } go func() { e.RunWorker() }() errChan <- nil }() return errChan } // Stop implements ExecutionEngine func (*CeremonyExecutionEngine) Stop(force bool) <-chan error { errChan := make(chan error) go func() { errChan <- nil }() return errChan } // ProcessMessage implements ExecutionEngine func (e *CeremonyExecutionEngine) ProcessMessage( address []byte, message *protobufs.Message, ) ([]*protobufs.Message, error) { if bytes.Equal(address, e.GetSupportedApplications()[0].Address) { e.logger.Info("processing execution message") any := &anypb.Any{} if err := proto.Unmarshal(message.Payload, any); err != nil { return nil, errors.Wrap(err, "process message") } switch any.TypeUrl { case protobufs.ClockFrameType: frame := &protobufs.ClockFrame{} if err := any.UnmarshalTo(frame); err != nil { return nil, errors.Wrap(err, "process message") } if frame.FrameNumber < e.clock.GetFrame() { return nil, nil } if err := frame.VerifyDataClockFrame(); err != nil { return nil, errors.Wrap(err, "process message") } if err := e.VerifyExecution(frame); err != nil { return nil, errors.Wrap(err, "process message") } case protobufs.CeremonyLobbyJoinType: fallthrough case protobufs.CeremonySeenProverAttestationType: fallthrough case protobufs.CeremonyDroppedProverAttestationType: fallthrough case protobufs.CeremonyTranscriptCommitType: fallthrough case protobufs.CeremonyTranscriptShareType: fallthrough case protobufs.CeremonyTranscriptType: frame := e.activeClockFrame if e.clock.IsInProverTrie(e.proverPublicKey) { app, err := application.MaterializeApplicationFromFrame(frame) if err != nil { return nil, errors.Wrap(err, "process message") } proposedTransition := &protobufs.CeremonyLobbyStateTransition{ TypeUrls: []string{any.TypeUrl}, TransitionInputs: [][]byte{ any.Value, }, } _, err = app.ApplyTransition(frame.FrameNumber, proposedTransition) if err != nil { return nil, errors.Wrap(err, "process message") } any := &anypb.Any{} if err := any.MarshalFrom(proposedTransition); err != nil { return nil, errors.Wrap(err, "process message") } any.TypeUrl = strings.Replace( any.TypeUrl, "type.googleapis.com", "types.quilibrium.com", 1, ) payload, err := proto.Marshal(any) if err != nil { return nil, errors.Wrap(err, "process message") } h, err := poseidon.HashBytes(payload) if err != nil { return nil, errors.Wrap(err, "process message") } msg := &protobufs.Message{ Hash: h.Bytes(), Address: e.provingKeyAddress, Payload: payload, } return []*protobufs.Message{ msg, }, nil } } } return nil, nil } func (e *CeremonyExecutionEngine) RunWorker() { frameChan := e.clock.GetFrameChannel() for { frameFromBuffer := <-frameChan frame := e.clock.GetActiveFrame() e.activeClockFrame = frame e.logger.Info( "evaluating next frame", zap.Int( "last_run_took_frames", int(frame.FrameNumber)-int(frameFromBuffer.FrameNumber), ), ) app, err := application.MaterializeApplicationFromFrame(frame) if err != nil { e.logger.Error( "error while materializing application from frame", zap.Error(err), ) panic(err) } _, _, reward := app.RewardTrie.Get(e.provingKeyAddress) e.logger.Info( "current application state", zap.Uint64("my_balance", reward), zap.String("lobby_state", app.LobbyState.String()), ) switch app.LobbyState { case application.CEREMONY_APPLICATION_STATE_OPEN: e.logger.Info( "lobby open for joins", zap.Any("lobby_joins", app.LobbyJoins), zap.Any("preferred_participants", app.NextRoundPreferredParticipants), zap.Uint64("state_count", app.StateCount), ) e.alreadyPublishedShare = false e.alreadyPublishedTranscript = false alreadyJoined := false for _, join := range app.LobbyJoins { if bytes.Equal( join.PublicKeySignatureEd448.PublicKey.KeyValue, e.proverPublicKey, ) { alreadyJoined = true break } } if !alreadyJoined { e.logger.Info( "joining lobby", zap.Binary("proving_key", e.proverPublicKey), ) if err := e.announceJoin(frame); err != nil { e.logger.Error( "failed to announce join", zap.Error(err), ) } e.logger.Info("preparing contribution") // Calculate this now after announcing, this gives 10 frames of buffer e.ensureSecrets(app) } case application.CEREMONY_APPLICATION_STATE_IN_PROGRESS: e.logger.Info( "round in progress", zap.Any("participants", app.ActiveParticipants), zap.Any("current_seen_attestations", app.LatestSeenProverAttestations), zap.Any( "current_dropped_attestations", app.DroppedParticipantAttestations, ), zap.Any( "preferred_participants_for_next_round", app.NextRoundPreferredParticipants, ), zap.Uint64("current_round", app.RoundCount), ) if len(e.activeSecrets) == 0 { // If we ended up in the scenario where we do not have any secrets // available but we're in the round, we should politely leave. for _, p := range app.ActiveParticipants { if bytes.Equal(p.KeyValue, e.proverPublicKey) { e.publishDroppedParticipant(e.proverPublicKey) break } } continue } shouldConnect := false position := 0 if len(e.peerChannels) == 0 && app.RoundCount == 1 && len(app.ActiveParticipants) > 1 { for i, p := range app.ActiveParticipants { if bytes.Equal(p.KeyValue, e.proverPublicKey) { shouldConnect = true position = i break } } } if shouldConnect { e.logger.Info( "connecting to peers", zap.Any("participants", app.ActiveParticipants), ) err := e.connectToActivePeers(app, position) if err != nil { e.logger.Error("error while connecting to peers", zap.Error(err)) continue } } if len(e.peerChannels) != 0 { done := false rounds := app.TranscriptRoundAdvanceCommits if len(rounds) != 0 { for _, c := range rounds[app.RoundCount-1].Commits { if bytes.Equal( c.ProverSignature.PublicKey.KeyValue, e.proverPublicKey, ) { done = true } } } if !done { e.logger.Info( "participating in round", zap.Any("participants", app.ActiveParticipants), zap.Uint64("current_round", app.RoundCount), ) err := e.participateRound(app) if err != nil { e.logger.Error("error while participating in round", zap.Error(err)) e.publishDroppedParticipant(e.proverPublicKey) } } } else if len(app.ActiveParticipants) == 1 && bytes.Equal(app.ActiveParticipants[0].KeyValue, e.proverPublicKey) { if err = e.commitRound(e.activeSecrets); err != nil { e.logger.Error("error while participating in round", zap.Error(err)) } } case application.CEREMONY_APPLICATION_STATE_FINALIZING: e.logger.Info( "round contribution finalizing", zap.Any("participants", app.ActiveParticipants), zap.Any("current_seen_attestations", app.LatestSeenProverAttestations), zap.Any( "current_dropped_attestations", app.DroppedParticipantAttestations, ), zap.Any( "preferred_participants_for_next_round", app.NextRoundPreferredParticipants, ), zap.Int("finalized_shares", len(app.TranscriptShares)), ) for _, s := range app.TranscriptShares { if bytes.Equal( s.ProverSignature.PublicKey.KeyValue, e.proverPublicKey, ) { e.alreadyPublishedShare = true } } shouldPublish := false for _, p := range app.ActiveParticipants { if bytes.Equal(p.KeyValue, e.proverPublicKey) { shouldPublish = true break } } if !e.alreadyPublishedShare && shouldPublish { if len(e.activeSecrets) == 0 { e.publishDroppedParticipant(e.proverPublicKey) continue } err := e.publishTranscriptShare(app) if err != nil { e.logger.Error( "error while publishing transcript share", zap.Error(err), ) } } case application.CEREMONY_APPLICATION_STATE_VALIDATING: e.logger.Info("round contribution validating") // Do a best effort to clear – Go's GC is noisy and unenforceable, but // this should at least mark it as dead space e.activeSecrets = []curves.Scalar{} for _, c := range e.peerChannels { c.Close() } e.peerChannels = map[string]*p2p.PublicP2PChannel{} if app.UpdatedTranscript != nil && !e.alreadyPublishedTranscript { if err := e.publishTranscript(app); err != nil { e.logger.Error( "error while publishing transcript", zap.Error(err), ) } } } } } func (e *CeremonyExecutionEngine) publishMessage( filter []byte, message proto.Message, ) error { any := &anypb.Any{} if err := any.MarshalFrom(message); err != nil { return errors.Wrap(err, "publish message") } any.TypeUrl = strings.Replace( any.TypeUrl, "type.googleapis.com", "types.quilibrium.com", 1, ) payload, err := proto.Marshal(any) if err != nil { return errors.Wrap(err, "publish message") } h, err := poseidon.HashBytes(payload) if err != nil { return errors.Wrap(err, "publish message") } msg := &protobufs.Message{ Hash: h.Bytes(), Address: application.CEREMONY_ADDRESS, Payload: payload, } data, err := proto.Marshal(msg) if err != nil { return errors.Wrap(err, "publish message") } return e.pubSub.PublishToBitmask(filter, data) } func (e *CeremonyExecutionEngine) announceJoin( frame *protobufs.ClockFrame, ) error { idk, err := e.keyManager.GetAgreementKey("q-ratchet-idk") if err != nil { if errors.Is(err, keys.KeyNotFoundErr) { idk, err = e.keyManager.CreateAgreementKey( "q-ratchet-idk", keys.KeyTypeX448, ) if err != nil { return errors.Wrap(err, "announce join") } } else { return errors.Wrap(err, "announce join") } } spk, err := e.keyManager.GetAgreementKey("q-ratchet-spk") if err != nil { if errors.Is(err, keys.KeyNotFoundErr) { spk, err = e.keyManager.CreateAgreementKey( "q-ratchet-spk", keys.KeyTypeX448, ) if err != nil { return errors.Wrap(err, "announce join") } } else { return errors.Wrap(err, "announce join") } } g := curves.ED448().Point.Generator() join := &protobufs.CeremonyLobbyJoin{ FrameNumber: frame.FrameNumber, IdentityKey: &protobufs.X448PublicKey{ KeyValue: g.Mul(idk).ToAffineCompressed(), }, SignedPreKey: &protobufs.X448PublicKey{ KeyValue: g.Mul(spk).ToAffineCompressed(), }, } sig, err := join.SignWithProverKey(e.provingKey) if err != nil { return errors.Wrap(err, "announce join") } join.PublicKeySignatureEd448 = &protobufs.Ed448Signature{ Signature: sig, PublicKey: &protobufs.Ed448PublicKey{ KeyValue: e.proverPublicKey, }, } return errors.Wrap( e.publishMessage( application.CEREMONY_ADDRESS, join, ), "announce join", ) } func (e *CeremonyExecutionEngine) connectToActivePeers( app *application.CeremonyApplication, position int, ) error { idk, err := e.keyManager.GetAgreementKey("q-ratchet-idk") if err != nil { return errors.Wrap(err, "connect to active peers") } spk, err := e.keyManager.GetAgreementKey("q-ratchet-spk") if err != nil { return errors.Wrap(err, "connect to active peers") } for i, p := range app.ActiveParticipants { if !bytes.Equal(p.KeyValue, e.proverPublicKey) { ic, err := e.keyStore.GetLatestKeyBundle(p.KeyValue) if err != nil { return errors.Wrap(err, "connect to active peers") } var kba *protobufs.KeyBundleAnnouncement switch ic.TypeUrl { case protobufs.KeyBundleAnnouncementType: kba = &protobufs.KeyBundleAnnouncement{} if err := proto.Unmarshal( ic.Data, kba, ); err != nil { return errors.Wrap(err, "connect to active peers") } } receiverIdk, err := curves.ED448().Point.FromAffineCompressed( kba.IdentityKey.GetPublicKeySignatureEd448().PublicKey.KeyValue, ) if err != nil { return errors.Wrap(err, "connect to active peers") } receiverSpk, err := curves.ED448().Point.FromAffineCompressed( kba.SignedPreKey.GetPublicKeySignatureEd448().PublicKey.KeyValue, ) if err != nil { return errors.Wrap(err, "connect to active peers") } e.peerChannels[string(p.KeyValue)], err = p2p.NewPublicP2PChannel( e.proverPublicKey, p.KeyValue, i > position, idk, spk, receiverIdk, receiverSpk, curves.ED448(), e.keyManager, e.pubSub, ) if err != nil { return errors.Wrap(err, "connect to active peers") } } } return nil } func (e *CeremonyExecutionEngine) participateRound( app *application.CeremonyApplication, ) error { idk, err := e.keyManager.GetAgreementKey("q-ratchet-idk") if err != nil { return errors.Wrap(err, "participate round") } spk, err := e.keyManager.GetAgreementKey("q-ratchet-spk") if err != nil { return errors.Wrap(err, "participate round") } idkPoint := curves.ED448().Point.Generator().Mul(idk) idks := []curves.Point{} initiator := false for _, p := range app.ActiveParticipants { if !bytes.Equal(p.KeyValue, e.proverPublicKey) { ic, err := e.keyStore.GetLatestKeyBundle(p.KeyValue) if err != nil { return errors.Wrap(err, "participate round") } var kba *protobufs.KeyBundleAnnouncement switch ic.TypeUrl { case protobufs.KeyBundleAnnouncementType: kba = &protobufs.KeyBundleAnnouncement{} if err := proto.Unmarshal( ic.Data, kba, ); err != nil { return errors.Wrap(err, "participate round") } } receiverIdk, err := curves.ED448().Point.FromAffineCompressed( kba.IdentityKey.GetPublicKeySignatureEd448().PublicKey.KeyValue, ) if err != nil { return errors.Wrap(err, "participate round") } receiverSpk, err := curves.ED448().Point.FromAffineCompressed( kba.SignedPreKey.GetPublicKeySignatureEd448().PublicKey.KeyValue, ) if err != nil { return errors.Wrap(err, "participate round") } if _, ok := e.peerChannels[string(p.KeyValue)]; !ok { e.peerChannels[string(p.KeyValue)], err = p2p.NewPublicP2PChannel( e.proverPublicKey, p.KeyValue, initiator, idk, spk, receiverIdk, receiverSpk, curves.ED448(), e.keyManager, e.pubSub, ) if err != nil { return errors.Wrap(err, "participate round") } } idks = append(idks, receiverIdk) } else { initiator = true idks = append(idks, idkPoint) } } pubKeys := [][]byte{} for _, p := range app.ActiveParticipants { pubKeys = append(pubKeys, p.KeyValue) } newSecrets, err := application.ProcessRound( e.proverPublicKey, idk, int(app.RoundCount), pubKeys, idks, e.activeSecrets, curves.BLS48581G1(), func(i int, receiver []byte, msg []byte) error { return e.peerChannels[string(receiver)].Send(msg) }, func(i int, sender []byte) ([]byte, error) { msg, err := e.peerChannels[string( sender, )].Receive() if err != nil { e.publishDroppedParticipant(sender) return nil, err } else { if i == 0 { e.publishLastSeenParticipant(sender) } return msg, nil } }, app.LatestTranscript.G1Powers[1].KeyValue, ) if err != nil { return errors.Wrap(err, "participate round") } return errors.Wrap(e.commitRound(newSecrets), "participate round") } func (e *CeremonyExecutionEngine) commitRound(secrets []curves.Scalar) error { g2Pub := curves.BLS48581G2().Point.Generator().Mul(secrets[0]) sig, err := application.SignProverKeyForCommit( e.proverPublicKey, secrets[0], ) if err != nil { return errors.Wrap(err, "commit round") } proverSig, err := e.provingKey.Sign( rand.Reader, g2Pub.ToAffineCompressed(), crypto.Hash(0), ) if err != nil { return errors.Wrap(err, "commit round") } advance := &protobufs.CeremonyTranscriptCommit{ ProverSignature: &protobufs.Ed448Signature{ Signature: proverSig, PublicKey: &protobufs.Ed448PublicKey{ KeyValue: e.proverPublicKey, }, }, ContributionSignature: &protobufs.BLS48581Signature{ Signature: sig, PublicKey: &protobufs.BLS48581G2PublicKey{ KeyValue: g2Pub.ToAffineCompressed(), }, }, } if err := e.publishMessage( application.CEREMONY_ADDRESS, advance, ); err != nil { return errors.Wrap(err, "commit round") } e.activeSecrets = secrets return nil } // Publishes a dropped participant attestation, logs any errors but does not // forward them on. func (e *CeremonyExecutionEngine) publishDroppedParticipant( participant []byte, ) { frameNumber := e.clock.GetFrame() b := binary.BigEndian.AppendUint64([]byte("dropped"), frameNumber) b = append(b, participant...) sig, err := e.provingKey.Sign(rand.Reader, b, crypto.Hash(0)) if err != nil { e.logger.Error( "error while signing dropped participant attestation", zap.Error(err), ) return } dropped := &protobufs.CeremonyDroppedProverAttestation{ DroppedProverKey: &protobufs.Ed448PublicKey{ KeyValue: participant, }, LastSeenFrame: frameNumber, ProverSignature: &protobufs.Ed448Signature{ Signature: sig, PublicKey: &protobufs.Ed448PublicKey{ KeyValue: e.proverPublicKey, }, }, } err = e.publishMessage( application.CEREMONY_ADDRESS, dropped, ) if err != nil { e.logger.Error( "error while publishing dropped participant attestation", zap.Error(err), ) return } } // Publishes a last seen participant attestation, logs any errors but does not // forward them on. func (e *CeremonyExecutionEngine) publishLastSeenParticipant( participant []byte, ) { frameNumber := e.clock.GetFrame() b := binary.BigEndian.AppendUint64([]byte("lastseen"), frameNumber) b = append(b, participant...) sig, err := e.provingKey.Sign(rand.Reader, b, crypto.Hash(0)) if err != nil { e.logger.Error( "error while signing last seen participant attestation", zap.Error(err), ) return } seen := &protobufs.CeremonySeenProverAttestation{ SeenProverKey: &protobufs.Ed448PublicKey{ KeyValue: participant, }, LastSeenFrame: frameNumber, ProverSignature: &protobufs.Ed448Signature{ Signature: sig, PublicKey: &protobufs.Ed448PublicKey{ KeyValue: e.proverPublicKey, }, }, } err = e.publishMessage( application.CEREMONY_ADDRESS, seen, ) if err != nil { e.logger.Error( "error while publishing dropped participant attestation", zap.Error(err), ) return } } func (e *CeremonyExecutionEngine) publishTranscriptShare( app *application.CeremonyApplication, ) error { transcriptShare := &protobufs.CeremonyTranscriptShare{} transcriptShare.AdditiveG1Powers = make( []*protobufs.BLS48581G1PublicKey, len(e.activeSecrets), ) transcriptShare.AdditiveG2Powers = make( []*protobufs.BLS48581G2PublicKey, len(app.LatestTranscript.G2Powers)-1, ) eg := errgroup.Group{} eg.SetLimit(100) e.logger.Info("creating transcript share") for i, s := range e.activeSecrets { i := i s := s eg.Go(func() error { if i%100 == 0 { e.logger.Info( "writing transcript share chunk", zap.Int("chunk_start", i), ) } basisG1, err := curves.BLS48581G1().Point.FromAffineCompressed( app.LatestTranscript.G1Powers[i+1].KeyValue, ) if err != nil { return errors.Wrap(err, "publish transcript share") } transcriptShare.AdditiveG1Powers[i] = &protobufs.BLS48581G1PublicKey{ KeyValue: basisG1.Mul(s).ToAffineCompressed(), } if i+1 < len(app.LatestTranscript.G2Powers) { basisG2, err := curves.BLS48581G2().Point.FromAffineCompressed( app.LatestTranscript.G2Powers[i+1].KeyValue, ) if err != nil { return errors.Wrap(err, "publish transcript share") } transcriptShare.AdditiveG2Powers[i] = &protobufs.BLS48581G2PublicKey{ KeyValue: basisG2.Mul(s).ToAffineCompressed(), } } return nil }) } if err := eg.Wait(); err != nil { return err } e.logger.Info( "done writing transcript chunks, adding witnesses and signing", ) transcriptShare.AdditiveG1_256Witness = &protobufs.BLS48581G1PublicKey{ KeyValue: curves.BLS48581G1().Point.Generator().Mul( e.activeSecrets[len(app.LatestTranscript.G2Powers)-2], ).ToAffineCompressed(), } transcriptShare.AdditiveG2_256Witness = &protobufs.BLS48581G2PublicKey{ KeyValue: curves.BLS48581G2().Point.Generator().Mul( e.activeSecrets[len(app.LatestTranscript.G2Powers)-2], ).ToAffineCompressed(), } sig, err := transcriptShare.SignWithProverKey(e.provingKey) if err != nil { errors.Wrap(err, "publish transcript share") } transcriptShare.ProverSignature = &protobufs.Ed448Signature{ Signature: sig, PublicKey: &protobufs.Ed448PublicKey{ KeyValue: e.proverPublicKey, }, } err = errors.Wrap( e.publishMessage( application.CEREMONY_ADDRESS, transcriptShare, ), "publish transcript share", ) if err != nil { return err } else { e.alreadyPublishedShare = true return nil } } func (e *CeremonyExecutionEngine) VerifyExecution( frame *protobufs.ClockFrame, ) error { if e.clock.GetFrame() != frame.FrameNumber-1 { return nil } if len(frame.AggregateProofs) > 0 { for _, proofs := range frame.AggregateProofs { for _, inclusion := range proofs.InclusionCommitments { if inclusion.TypeUrl == protobufs.IntrinsicExecutionOutputType { transition, _, err := application.GetOutputsFromClockFrame(frame) if err != nil { return errors.Wrap(err, "verify execution") } parent, err := e.clockStore.GetParentDataClockFrame( application.CEREMONY_ADDRESS, frame.FrameNumber-1, frame.ParentSelector, ) if err != nil && !errors.Is(err, store.ErrNotFound) { return errors.Wrap(err, "verify execution") } if parent == nil { return errors.Wrap( errors.New("missing parent frame"), "verify execution", ) } a, err := application.MaterializeApplicationFromFrame(parent) if err != nil { return errors.Wrap(err, "verify execution") } a, err = a.ApplyTransition(frame.FrameNumber, transition) if err != nil { return errors.Wrap(err, "verify execution") } a2, err := application.MaterializeApplicationFromFrame(frame) if err != nil { return errors.Wrap(err, "verify execution") } if !a.Equals(a2) { return errors.Wrap( application.ErrInvalidStateTransition, "verify execution", ) } return nil } } } } return nil } func (e *CeremonyExecutionEngine) publishTranscript( app *application.CeremonyApplication, ) error { e.logger.Info("publishing updated transcript") e.alreadyPublishedTranscript = true err := errors.Wrap( e.publishMessage( application.CEREMONY_ADDRESS, app.UpdatedTranscript, ), "publish transcript share", ) if err != nil { e.alreadyPublishedTranscript = false return err } else { return nil } } func (e *CeremonyExecutionEngine) ensureSecrets( app *application.CeremonyApplication, ) { if len(e.activeSecrets) == 0 { e.activeSecrets = []curves.Scalar{} t := curves.BLS48581G1().Scalar.Random(rand.Reader) x := t.Clone() for i := 0; i < len(app.LatestTranscript.G1Powers)-1; i++ { if i%1000 == 0 { e.logger.Info( "calculating secrets for contribution", zap.Int("secrets_calculated", i), zap.Int("total_secrets", len(app.LatestTranscript.G1Powers)-1), ) } e.activeSecrets = append(e.activeSecrets, x) x = x.Mul(t) } e.logger.Info( "done preparing contribution", zap.Int("secrets_calculated", len(e.activeSecrets)), ) } }