package ceremony import ( "bytes" "time" "github.com/pkg/errors" "go.uber.org/zap" "golang.org/x/crypto/sha3" "google.golang.org/protobuf/proto" "google.golang.org/protobuf/types/known/anypb" "source.quilibrium.com/quilibrium/monorepo/go-libp2p-blossomsub/pb" "source.quilibrium.com/quilibrium/monorepo/nekryptology/pkg/core/curves" qcrypto "source.quilibrium.com/quilibrium/monorepo/node/crypto" "source.quilibrium.com/quilibrium/monorepo/node/protobufs" "source.quilibrium.com/quilibrium/monorepo/node/store" "source.quilibrium.com/quilibrium/monorepo/node/tries" ) func (e *CeremonyDataClockConsensusEngine) handleSync( message *pb.Message, ) error { e.logger.Debug( "received message", zap.Binary("data", message.Data), zap.Binary("from", message.From), zap.Binary("signature", message.Signature), ) if bytes.Equal(message.From, e.pubSub.GetPeerID()) { return nil } msg := &protobufs.Message{} if err := proto.Unmarshal(message.Data, msg); err != nil { return errors.Wrap(err, "handle sync") } any := &anypb.Any{} if err := proto.Unmarshal(msg.Payload, any); err != nil { return errors.Wrap(err, "handle sync") } switch any.TypeUrl { case protobufs.ClockFrameType: if err := e.handleClockFrameData( message.From, msg.Address, any, true, ); err != nil { return errors.Wrap(err, "handle sync") } case protobufs.ClockFramesResponseType: if err := e.handleClockFramesResponse( message.From, msg.Address, any, ); err != nil { return errors.Wrap(err, "handle sync") } case protobufs.ClockFramesRequestType: if err := e.handleClockFramesRequest( message.From, msg.Address, any, ); err != nil { return errors.Wrap(err, "handle sync") } case protobufs.ProvingKeyAnnouncementType: if err := e.handleProvingKey( message.From, msg.Address, any, ); err != nil { return errors.Wrap(err, "handle sync") } case protobufs.KeyBundleAnnouncementType: if err := e.handleKeyBundle( message.From, msg.Address, any, ); err != nil { return errors.Wrap(err, "handle sync") } } return nil } func (e *CeremonyDataClockConsensusEngine) handleClockFramesResponse( peerID []byte, address []byte, any *anypb.Any, ) error { if bytes.Equal(peerID, e.pubSub.GetPeerID()) { return nil } if !bytes.Equal(peerID, e.syncingTarget) { e.logger.Debug( "received clock frames response from unexpected target", zap.Binary("peer_id", peerID), zap.Binary("expected_peer_id", e.syncingTarget), ) return nil } e.syncingStatus = SyncStatusSynchronizing defer func() { e.syncingStatus = SyncStatusNotSyncing }() response := &protobufs.ClockFramesResponse{} if err := any.UnmarshalTo(response); err != nil { return errors.Wrap(err, "handle clock frames response") } trieCopyBytes, err := e.frameProverTrie.Serialize() if err != nil { return errors.Wrap(err, "handle clock frames response") } trieCopy := &tries.RollingFrecencyCritbitTrie{} if err = trieCopy.Deserialize(trieCopyBytes); err != nil { return errors.Wrap(err, "handle clock frames response") } for _, frame := range response.ClockFrames { prover, err := frame.GetAddress() if err != nil { return errors.Wrap(err, "handle clock frames response") } earliestFrame, _, count := trieCopy.Get(prover) if count == 0 || earliestFrame >= frame.FrameNumber { return errors.Wrap( errors.New("prover not in trie"), "handle clock frame response", ) } e.logger.Info( "processing clock frame", zap.Binary("sender_address", address), zap.Binary("prover_address", prover), zap.Binary("filter", frame.Filter), zap.Uint64("frame_number", frame.FrameNumber), ) if err := frame.VerifyDataClockFrame(); err != nil { e.logger.Error("could not verify clock frame", zap.Error(err)) return errors.Wrap(err, "handle clock frame response") } aggregateCommitments := []curves.PairingPoint{} for i := 0; i < (len(frame.Input)-516)/74; i++ { c, err := curves.BLS48581G1().NewGeneratorPoint().FromAffineCompressed( frame.Input[516+(i*74) : 516+(i*74)+74], ) if err != nil { e.logger.Error("could not verify clock frame", zap.Error(err)) return errors.Wrap(err, "handle clock frame response") } aggregateCommitments = append( aggregateCommitments, c.(curves.PairingPoint), ) } for i, proof := range frame.AggregateProofs { aggregatePoly := [][]curves.PairingScalar{} commitments := []curves.PairingPoint{} for _, commit := range proof.GetInclusionCommitments() { switch commit.TypeUrl { case protobufs.IntrinsicExecutionOutputType: e.logger.Debug("confirming inclusion in aggregate") digest := sha3.NewShake256() _, err := digest.Write(commit.Data) if err != nil { e.logger.Error( "error converting key bundle to polynomial", zap.Error(err), ) return errors.Wrap(err, "handle clock frame response") } expand := make([]byte, 1024) _, err = digest.Read(expand) if err != nil { e.logger.Error( "error converting key bundle to polynomial", zap.Error(err), ) return errors.Wrap(err, "handle clock frame response") } poly, err := e.prover.BytesToPolynomial(expand) if err != nil { e.logger.Error( "error converting key bundle to polynomial", zap.Error(err), ) return errors.Wrap(err, "handle clock frame response") } evalPoly, err := qcrypto.FFT( poly, *curves.BLS48581( curves.BLS48581G1().NewGeneratorPoint(), ), 16, false, ) if err != nil { e.logger.Error( "error performing fast fourier transform on key bundle", zap.Error(err), ) return errors.Wrap(err, "handle clock frame response") } e.logger.Debug( "created fft of polynomial", zap.Int("poly_size", len(evalPoly)), ) aggregatePoly = append(aggregatePoly, evalPoly) c, err := curves.BLS48581G1().NewGeneratorPoint().FromAffineCompressed( commit.Commitment, ) if err != nil { e.logger.Error("could not verify clock frame", zap.Error(err)) return errors.Wrap(err, "handle clock frame data") } commitments = append(commitments, c.(curves.PairingPoint)) default: poly, err := e.prover.BytesToPolynomial(commit.Data) if err != nil { e.logger.Error( "error converting key bundle to polynomial", zap.Error(err), ) return errors.Wrap(err, "handle clock frame response") } for i := 0; i < 128-len(poly); i++ { poly = append( poly, curves.BLS48581G1().Scalar.Zero().(curves.PairingScalar), ) } evalPoly, err := qcrypto.FFT( poly, *curves.BLS48581( curves.BLS48581G1().NewGeneratorPoint(), ), 128, false, ) if err != nil { e.logger.Error( "error performing fast fourier transform on key bundle", zap.Error(err), ) return errors.Wrap(err, "handle clock frame response") } aggregatePoly = append(aggregatePoly, evalPoly) c, err := curves.BLS48581G1().NewGeneratorPoint().FromAffineCompressed( commit.Commitment, ) if err != nil { e.logger.Error("could not verify clock frame", zap.Error(err)) return errors.Wrap(err, "handle clock frame response") } commitments = append(commitments, c.(curves.PairingPoint)) } } p, err := curves.BLS48581G1().NewGeneratorPoint().FromAffineCompressed( proof.Proof, ) if err != nil { e.logger.Error("could not verify clock frame", zap.Error(err)) return errors.Wrap(err, "handle clock frame response") } result, err := e.prover.VerifyAggregateProof( aggregatePoly, commitments, aggregateCommitments[i], p.(curves.PairingPoint), ) if err != nil { e.logger.Error("could not verify clock frame", zap.Error(err)) return errors.Wrap(err, "handle clock frame response") } if !result { e.logger.Error("could not verify clock frame", zap.Error(err)) return errors.Wrap( errors.New("invalid proof"), "handle clock frame response", ) } } e.logger.Info( "clock frame was valid", zap.Binary("sender_address", address), zap.Binary("prover_address", prover), zap.Binary("filter", frame.Filter), zap.Uint64("frame_number", frame.FrameNumber), ) parentSelector, selector, distance, err := frame.GetParentSelectorAndDistance() if err != nil { return errors.Wrap(err, "handle clock frame data") } e.logger.Debug( "difference between selector/discriminator", zap.Binary("difference", distance.Bytes()), ) txn, err := e.clockStore.NewTransaction() if err != nil { e.logger.Error("could not save candidate clock frame", zap.Error(err)) return errors.Wrap(err, "handle clock frame response") } if err := e.clockStore.PutCandidateDataClockFrame( parentSelector.Bytes(), distance.Bytes(), selector.Bytes(), frame, txn, ); err != nil { e.logger.Error("could not save candidate clock frame", zap.Error(err)) return errors.Wrap(err, "handle clock frame response") } if err := txn.Commit(); err != nil { e.logger.Error("could not save candidate clock frame", zap.Error(err)) return errors.Wrap(err, "handle clock frame response") } if e.frame < frame.FrameNumber { e.latestFrameReceived = frame.FrameNumber e.lastFrameReceivedAt = time.Now().UTC() } trieCopy.Add(prover, frame.FrameNumber) e.frameSeenProverTrie.Add(prover, frame.FrameNumber) } return nil } func (e *CeremonyDataClockConsensusEngine) handleProvingKeyRequest( peerID []byte, address []byte, any *anypb.Any, ) error { if bytes.Equal(peerID, e.pubSub.GetPeerID()) { return nil } request := &protobufs.ProvingKeyRequest{} if err := any.UnmarshalTo(request); err != nil { return nil } if len(request.ProvingKeyBytes) == 0 { e.logger.Debug( "received proving key request for empty key", zap.Binary("peer_id", peerID), zap.Binary("address", address), ) return nil } e.pubSub.Subscribe( append(append([]byte{}, e.filter...), peerID...), e.handleSync, true, ) e.logger.Debug( "received proving key request", zap.Binary("peer_id", peerID), zap.Binary("address", address), zap.Binary("proving_key", request.ProvingKeyBytes), ) var provingKey *protobufs.ProvingKeyAnnouncement inclusion, err := e.keyStore.GetProvingKey(request.ProvingKeyBytes) if err != nil { if !errors.Is(err, store.ErrNotFound) { e.logger.Debug( "peer asked for proving key that returned error", zap.Binary("peer_id", peerID), zap.Binary("address", address), zap.Binary("proving_key", request.ProvingKeyBytes), ) return nil } provingKey, err = e.keyStore.GetStagedProvingKey(request.ProvingKeyBytes) if !errors.Is(err, store.ErrNotFound) { e.logger.Debug( "peer asked for proving key that returned error", zap.Binary("peer_id", peerID), zap.Binary("address", address), zap.Binary("proving_key", request.ProvingKeyBytes), ) return nil } else if err != nil { e.logger.Debug( "peer asked for unknown proving key", zap.Binary("peer_id", peerID), zap.Binary("address", address), zap.Binary("proving_key", request.ProvingKeyBytes), ) return nil } } else { err := proto.Unmarshal(inclusion.Data, provingKey) if err != nil { e.logger.Debug( "inclusion commitment could not be deserialized", zap.Binary("peer_id", peerID), zap.Binary("address", address), zap.Binary("proving_key", request.ProvingKeyBytes), ) return nil } } if err := e.publishMessage( append(append([]byte{}, e.filter...), peerID...), provingKey, ); err != nil { return nil } return nil } func (e *CeremonyDataClockConsensusEngine) handleClockFramesRequest( peerID []byte, address []byte, any *anypb.Any, ) error { if bytes.Equal(peerID, e.pubSub.GetPeerID()) { return nil } request := &protobufs.ClockFramesRequest{} if err := any.UnmarshalTo(request); err != nil { return errors.Wrap(err, "handle clock frame request") } e.pubSub.Subscribe( append(append([]byte{}, e.filter...), peerID...), e.handleSync, true, ) e.logger.Info( "received clock frame request", zap.Binary("peer_id", peerID), zap.Binary("address", address), zap.Uint64("from_frame_number", request.FromFrameNumber), zap.Uint64("to_frame_number", request.ToFrameNumber), ) from := request.FromFrameNumber base, _, err := e.clockStore.GetDataClockFrame( request.Filter, from, ) if err != nil { if !errors.Is(err, store.ErrNotFound) { e.logger.Error( "peer asked for frame that returned error", zap.Binary("peer_id", peerID), zap.Binary("address", address), zap.Uint64("frame_number", request.FromFrameNumber), ) return errors.Wrap(err, "handle clock frame request") } else { e.logger.Debug( "peer asked for undiscovered frame", zap.Binary("peer_id", peerID), zap.Binary("address", address), zap.Uint64("frame_number", request.FromFrameNumber), ) if err = e.publishMessage( append(append([]byte{}, e.filter...), peerID...), &protobufs.ClockFramesResponse{ Filter: request.Filter, FromFrameNumber: 0, ToFrameNumber: 0, ClockFrames: []*protobufs.ClockFrame{}, }, ); err != nil { return errors.Wrap(err, "handle clock frame request") } return nil } } to := request.ToFrameNumber if to == 0 || to-request.FromFrameNumber > 32 { to = request.FromFrameNumber + 31 } set := []*protobufs.ClockFrame{base} noMoreFinalized := false searchSpan := []*protobufs.ClockFrame{base} currentNumber := 1 for len(searchSpan) != 0 && from+uint64(currentNumber) <= to { e.logger.Info( "scanning frames to add to response", zap.Binary("peer_id", peerID), zap.Binary("address", address), zap.Uint64("from", from), zap.Uint64("to", to), zap.Uint64("current_number", uint64(currentNumber)), ) nextSpan := []*protobufs.ClockFrame{} for _, s := range searchSpan { selector, err := s.GetSelector() if err != nil { return errors.Wrap(err, "handle clock frame request") } if !noMoreFinalized { frame, _, err := e.clockStore.GetDataClockFrame( s.Filter, s.FrameNumber+1, ) if err != nil { if errors.Is(err, store.ErrNotFound) { noMoreFinalized = true } else { e.logger.Error( "fetching clock frame produced error", zap.Binary("peer_id", peerID), zap.Binary("address", address), zap.Uint64("frame_number", s.FrameNumber+1), ) return errors.Wrap(err, "handle clock frame request") } } else { if err = e.publishMessage( append(append([]byte{}, e.filter...), peerID...), frame, ); err != nil { return errors.Wrap(err, "handle clock frame request") } nextSpan = append(nextSpan, frame) set = append(set, frame) } } if noMoreFinalized { iter, err := e.clockStore.RangeCandidateDataClockFrames( s.Filter, selector.Bytes(), s.FrameNumber+1, ) if err != nil { e.logger.Error( "peer asked for frame that returned error while iterating", zap.Binary("peer_id", peerID), zap.Binary("address", address), zap.Binary("parent_selector", s.ParentSelector), zap.Uint64("frame_number", s.FrameNumber+1), ) return errors.Wrap(err, "handle clock frame request") } for iter.First(); iter.Valid(); iter.Next() { frame, err := iter.Value() if err != nil { e.logger.Error( "peer asked for frame that returned error while getting value", zap.Binary("peer_id", peerID), zap.Binary("address", address), zap.Binary("parent_selector", selector.Bytes()), zap.Uint64("frame_number", s.FrameNumber+1), ) return errors.Wrap(err, "handle clock frame request") } if err = e.publishMessage( append(append([]byte{}, e.filter...), peerID...), frame, ); err != nil { return errors.Wrap(err, "handle clock frame request") } nextSpan = append(nextSpan, frame) set = append(set, frame) } iter.Close() } } currentNumber++ searchSpan = nextSpan } return nil }