mirror of
https://source.quilibrium.com/quilibrium/ceremonyclient.git
synced 2024-12-25 08:05:17 +00:00
581 lines
14 KiB
Go
581 lines
14 KiB
Go
package crypto
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import (
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"github.com/pkg/errors"
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"go.uber.org/zap"
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"golang.org/x/crypto/sha3"
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"source.quilibrium.com/quilibrium/monorepo/nekryptology/pkg/core/curves"
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"source.quilibrium.com/quilibrium/monorepo/node/crypto/kzg"
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"source.quilibrium.com/quilibrium/monorepo/node/protobufs"
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)
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type KZGInclusionProver struct {
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prover *kzg.KZGProver
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logger *zap.Logger
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}
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func NewKZGInclusionProver(logger *zap.Logger) *KZGInclusionProver {
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return &KZGInclusionProver{
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prover: kzg.DefaultKZGProver(),
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logger: logger,
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}
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}
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// Commit implements InclusionProver.
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func (k *KZGInclusionProver) Commit(
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data []byte,
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typeUrl string,
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) (*InclusionCommitment, error) {
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if typeUrl == protobufs.IntrinsicExecutionOutputType {
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digest := sha3.NewShake256()
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_, err := digest.Write(data)
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if err != nil {
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k.logger.Error(
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"error converting key bundle to polynomial",
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zap.Error(err),
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)
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return nil, errors.Wrap(err, "prove aggregate")
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}
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expand := make([]byte, 1024)
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_, err = digest.Read(expand)
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if err != nil {
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k.logger.Error(
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"error converting key bundle to polynomial",
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zap.Error(err),
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)
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return nil, errors.Wrap(err, "prove aggregate")
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}
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poly, err := k.prover.BytesToPolynomial(expand)
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if err != nil {
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return nil, errors.Wrap(err, "commit")
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}
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k.logger.Debug("proving execution output for inclusion")
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polys, err := kzg.FFT(
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poly,
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*curves.BLS48581(
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curves.BLS48581G1().NewGeneratorPoint(),
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),
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16,
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false,
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)
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if err != nil {
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return nil, errors.Wrap(err, "prove")
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}
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k.logger.Debug("converted execution output chunk to evaluation form")
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k.logger.Debug("creating kzg commitment")
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points, err := k.prover.Commit(polys)
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if err != nil {
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return nil, errors.Wrap(err, "prove")
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}
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return &InclusionCommitment{
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TypeUrl: typeUrl,
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Data: data,
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Commitment: points.ToAffineCompressed(),
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}, nil
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}
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poly, err := k.prover.BytesToPolynomial(data)
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if err != nil {
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return nil, errors.Wrap(err, "commit")
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}
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points, err := k.prover.Commit(poly)
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if err != nil {
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return nil, errors.Wrap(err, "commit")
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}
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return &InclusionCommitment{
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TypeUrl: typeUrl,
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Data: data,
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Commitment: points.ToAffineCompressed(),
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}, nil
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}
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// ProveAggregate implements InclusionProver.
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func (k *KZGInclusionProver) ProveAggregate(
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commits []*InclusionCommitment,
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) (*InclusionAggregateProof, error) {
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polys := [][]curves.PairingScalar{}
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commitPoints := []curves.PairingPoint{}
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for _, commit := range commits {
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switch commit.TypeUrl {
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case protobufs.IntrinsicExecutionOutputType:
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k.logger.Debug("confirming inclusion in aggregate")
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digest := sha3.NewShake256()
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_, err := digest.Write(commit.Data)
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if err != nil {
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k.logger.Error(
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"error converting key bundle to polynomial",
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zap.Error(err),
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)
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return nil, errors.Wrap(err, "prove aggregate")
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}
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expand := make([]byte, 1024)
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_, err = digest.Read(expand)
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if err != nil {
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k.logger.Error(
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"error converting key bundle to polynomial",
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zap.Error(err),
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)
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return nil, errors.Wrap(err, "prove aggregate")
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}
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poly, err := k.prover.BytesToPolynomial(expand)
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if err != nil {
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k.logger.Error(
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"error converting key bundle to polynomial",
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zap.Error(err),
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)
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return nil, errors.Wrap(err, "prove aggregate")
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}
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evalPoly, err := kzg.FFT(
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poly,
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*curves.BLS48581(
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curves.BLS48581G1().NewGeneratorPoint(),
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),
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16,
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false,
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)
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if err != nil {
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k.logger.Error(
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"error performing fast fourier transform on key bundle",
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zap.Error(err),
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)
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return nil, errors.Wrap(err, "prove aggregate")
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}
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k.logger.Debug(
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"created fft of polynomial",
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zap.Int("poly_size", len(evalPoly)),
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)
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polys = append(polys, evalPoly)
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c, err := curves.BLS48581G1().NewGeneratorPoint().FromAffineCompressed(
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commit.Commitment,
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)
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if err != nil {
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return nil, errors.Wrap(err, "prove aggregate")
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}
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commitPoints = append(commitPoints, c.(curves.PairingPoint))
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default:
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k.logger.Debug("confirming inclusion in aggregate")
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poly, err := k.prover.BytesToPolynomial(commit.Data)
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if err != nil {
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k.logger.Error(
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"error converting key bundle to polynomial",
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zap.Error(err),
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)
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return nil, errors.Wrap(err, "prove aggregate")
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}
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for i := 0; i < 1024-len(poly); i++ {
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poly = append(
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poly,
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curves.BLS48581G1().Scalar.Zero().(curves.PairingScalar),
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)
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}
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evalPoly, err := kzg.FFT(
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poly,
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*curves.BLS48581(
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curves.BLS48581G1().NewGeneratorPoint(),
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),
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1024,
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false,
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)
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if err != nil {
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k.logger.Error(
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"error performing fast fourier transform on key bundle",
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zap.Error(err),
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)
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return nil, errors.Wrap(err, "prove aggregate")
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}
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k.logger.Debug(
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"created fft of polynomial",
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zap.Int("poly_size", len(evalPoly)),
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)
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polys = append(polys, evalPoly)
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c, err := curves.BLS48581G1().NewGeneratorPoint().FromAffineCompressed(
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commit.Commitment,
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)
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if err != nil {
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k.logger.Error("could not verify clock frame", zap.Error(err))
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return nil, errors.Wrap(err, "prove aggregate")
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}
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commitPoints = append(commitPoints, c.(curves.PairingPoint))
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}
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}
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proof, commitment, err := k.prover.ProveAggregate(
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polys,
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commitPoints,
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)
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if err != nil {
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return nil, errors.Wrap(err, "prove aggregate")
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}
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if proof.IsIdentity() {
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return nil, errors.Wrap(errors.New("invalid proof"), "prove aggregate")
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}
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return &InclusionAggregateProof{
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InclusionCommitments: commits,
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AggregateCommitment: commitment.ToAffineCompressed(),
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Proof: proof.ToAffineCompressed(),
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}, nil
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}
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// VerifyAggregate implements InclusionProver.
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func (k *KZGInclusionProver) VerifyAggregate(
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proof *InclusionAggregateProof,
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) (bool, error) {
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polys := [][]curves.PairingScalar{}
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commitPoints := []curves.PairingPoint{}
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for _, commit := range proof.InclusionCommitments {
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poly, err := k.prover.BytesToPolynomial(commit.Data)
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if err != nil {
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return false, errors.Wrap(err, "verify aggregate")
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}
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polys = append(polys, poly)
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point, err := curves.BLS48581G1().Point.FromAffineCompressed(
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commit.Commitment,
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)
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if err != nil {
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return false, errors.Wrap(err, "verify aggregate")
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}
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commitPoints = append(commitPoints, point.(curves.PairingPoint))
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}
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aggregate, err := curves.BLS48581G1().Point.FromAffineCompressed(
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proof.AggregateCommitment,
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)
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if err != nil {
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return false, errors.Wrap(err, "verify aggregate")
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}
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proofPoint, err := curves.BLS48581G1().Point.FromAffineCompressed(
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proof.Proof,
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)
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if err != nil {
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return false, errors.Wrap(err, "verify aggregate")
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}
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verify, err := k.prover.VerifyAggregateProof(
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polys,
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commitPoints,
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aggregate.(curves.PairingPoint),
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proofPoint.(curves.PairingPoint),
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)
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return verify, errors.Wrap(err, "verify aggregate")
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}
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func (k *KZGInclusionProver) VerifyFrame(
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frame *protobufs.ClockFrame,
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) error {
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aggregateCommitments := []curves.PairingPoint{}
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for i := 0; i < (len(frame.Input)-516)/74; i++ {
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c, err := curves.BLS48581G1().NewGeneratorPoint().FromAffineCompressed(
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frame.Input[516+(i*74) : 516+(i*74)+74],
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)
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if err != nil {
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k.logger.Error("could not verify clock frame", zap.Error(err))
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return errors.Wrap(err, "verify frame")
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}
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aggregateCommitments = append(aggregateCommitments, c.(curves.PairingPoint))
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}
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if len(aggregateCommitments) != len(frame.AggregateProofs) {
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k.logger.Error(
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"commit length mismatched proof for frame",
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zap.Int("commit_length", len(aggregateCommitments)),
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zap.Int("proof_length", len(frame.AggregateProofs)),
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)
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return errors.Wrap(
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errors.New("commit length mismatched proof for frame"),
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"verify frame",
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)
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}
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for i, proof := range frame.AggregateProofs {
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aggregatePoly := [][]curves.PairingScalar{}
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commitments := []curves.PairingPoint{}
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for _, commit := range proof.GetInclusionCommitments() {
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switch commit.TypeUrl {
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case protobufs.IntrinsicExecutionOutputType:
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k.logger.Debug("confirming inclusion in aggregate")
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digest := sha3.NewShake256()
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_, err := digest.Write(commit.Data)
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if err != nil {
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k.logger.Error(
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"error converting key bundle to polynomial",
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zap.Error(err),
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)
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return errors.Wrap(err, "verify frame")
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}
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expand := make([]byte, 1024)
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_, err = digest.Read(expand)
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if err != nil {
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k.logger.Error(
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"error converting key bundle to polynomial",
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zap.Error(err),
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)
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return errors.Wrap(err, "verify frame")
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}
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poly, err := k.prover.BytesToPolynomial(expand)
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if err != nil {
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k.logger.Error(
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"error converting key bundle to polynomial",
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zap.Error(err),
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)
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return errors.Wrap(err, "verify frame")
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}
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evalPoly, err := kzg.FFT(
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poly,
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*curves.BLS48581(
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curves.BLS48581G1().NewGeneratorPoint(),
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),
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16,
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false,
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)
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if err != nil {
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k.logger.Error(
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"error performing fast fourier transform on key bundle",
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zap.Error(err),
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)
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return errors.Wrap(err, "verify frame")
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}
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k.logger.Debug(
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"created fft of polynomial",
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zap.Int("poly_size", len(evalPoly)),
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)
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aggregatePoly = append(aggregatePoly, evalPoly)
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c, err := curves.BLS48581G1().NewGeneratorPoint().FromAffineCompressed(
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commit.Commitment,
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)
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if err != nil {
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k.logger.Error("could not verify clock frame", zap.Error(err))
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return errors.Wrap(err, "verify frame")
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}
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commitments = append(commitments, c.(curves.PairingPoint))
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default:
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k.logger.Debug("confirming inclusion in aggregate")
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poly, err := k.prover.BytesToPolynomial(commit.Data)
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if err != nil {
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k.logger.Error(
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"error converting key bundle to polynomial",
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zap.Error(err),
|
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)
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return errors.Wrap(err, "verify frame")
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}
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for i := 0; i < 1024-len(poly); i++ {
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poly = append(
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poly,
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curves.BLS48581G1().Scalar.Zero().(curves.PairingScalar),
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)
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}
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evalPoly, err := kzg.FFT(
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poly,
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*curves.BLS48581(
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curves.BLS48581G1().NewGeneratorPoint(),
|
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),
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1024,
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false,
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)
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if err != nil {
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k.logger.Error(
|
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"error performing fast fourier transform on key bundle",
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zap.Error(err),
|
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)
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return errors.Wrap(err, "verify frame")
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}
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k.logger.Debug(
|
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"created fft of polynomial",
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zap.Int("poly_size", len(evalPoly)),
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)
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aggregatePoly = append(aggregatePoly, evalPoly)
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c, err := curves.BLS48581G1().NewGeneratorPoint().FromAffineCompressed(
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commit.Commitment,
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)
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if err != nil {
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k.logger.Error("could not verify clock frame", zap.Error(err))
|
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return errors.Wrap(err, "verify frame")
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}
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commitments = append(commitments, c.(curves.PairingPoint))
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}
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}
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p, err := curves.BLS48581G1().Point.FromAffineCompressed(
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proof.Proof,
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)
|
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if err != nil {
|
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k.logger.Error("could not verify clock frame", zap.Error(err))
|
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return errors.Wrap(err, "verify frame")
|
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}
|
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|
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result, err := k.prover.VerifyAggregateProof(
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aggregatePoly,
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commitments,
|
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aggregateCommitments[i],
|
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p.(curves.PairingPoint),
|
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)
|
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if err != nil {
|
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k.logger.Error(
|
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"could not verify clock frame",
|
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zap.Error(err),
|
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)
|
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return errors.Wrap(err, "verify frame")
|
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}
|
|
|
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if !result {
|
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k.logger.Error("could not verify clock frame", zap.Error(err))
|
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return errors.Wrap(
|
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errors.New("invalid proof"),
|
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"verify frame",
|
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)
|
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}
|
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}
|
|
|
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return nil
|
|
}
|
|
|
|
func (k *KZGInclusionProver) CommitRaw(
|
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data []byte,
|
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polySize uint64,
|
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) ([]byte, error) {
|
|
poly, err := k.prover.BytesToPolynomial(data)
|
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if err != nil {
|
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return nil, errors.Wrap(err, "commit raw")
|
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}
|
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for i := len(poly); i < int(polySize); i++ {
|
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poly = append(poly, curves.BLS48581G1().NewScalar().(curves.PairingScalar))
|
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}
|
|
|
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commit, err := k.prover.Commit(poly)
|
|
if err != nil {
|
|
return nil, errors.Wrap(err, "commit raw")
|
|
}
|
|
|
|
return commit.ToAffineCompressed(), nil
|
|
}
|
|
|
|
func (k *KZGInclusionProver) ProveRaw(
|
|
data []byte,
|
|
index int,
|
|
polySize uint64,
|
|
) ([]byte, error) {
|
|
poly, err := k.prover.BytesToPolynomial(data)
|
|
if err != nil {
|
|
return nil, errors.Wrap(err, "prove raw")
|
|
}
|
|
for i := len(poly); i < int(polySize); i++ {
|
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poly = append(poly, curves.BLS48581G1().NewScalar().(curves.PairingScalar))
|
|
}
|
|
|
|
z := kzg.RootsOfUnityBLS48581[polySize][index]
|
|
|
|
evalPoly, err := kzg.FFT(
|
|
poly,
|
|
*curves.BLS48581(
|
|
curves.BLS48581G1().NewGeneratorPoint(),
|
|
),
|
|
polySize,
|
|
true,
|
|
)
|
|
if err != nil {
|
|
return nil, errors.Wrap(err, "prove raw")
|
|
}
|
|
|
|
divisors := make([]curves.PairingScalar, 2)
|
|
divisors[0] = (&curves.ScalarBls48581{}).Zero().Sub(z).(*curves.ScalarBls48581)
|
|
divisors[1] = (&curves.ScalarBls48581{}).One().(*curves.ScalarBls48581)
|
|
|
|
a := make([]curves.PairingScalar, len(evalPoly))
|
|
for i := 0; i < len(a); i++ {
|
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a[i] = evalPoly[i].Clone().(*curves.ScalarBls48581)
|
|
}
|
|
|
|
// Adapted from Feist's amortized proofs:
|
|
aPos := len(a) - 1
|
|
bPos := len(divisors) - 1
|
|
diff := aPos - bPos
|
|
out := make([]curves.PairingScalar, diff+1, diff+1)
|
|
for diff >= 0 {
|
|
out[diff] = a[aPos].Div(divisors[bPos]).(*curves.ScalarBls48581)
|
|
for i := bPos; i >= 0; i-- {
|
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a[diff+i] = a[diff+i].Sub(
|
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out[diff].Mul(divisors[i]),
|
|
).(*curves.ScalarBls48581)
|
|
}
|
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aPos -= 1
|
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diff -= 1
|
|
}
|
|
|
|
proof, err := k.prover.PointLinearCombination(
|
|
kzg.CeremonyBLS48581G1[:polySize-1],
|
|
out,
|
|
)
|
|
|
|
if err != nil {
|
|
return nil, errors.Wrap(err, "prove raw")
|
|
}
|
|
|
|
return proof.ToAffineCompressed(), nil
|
|
}
|
|
|
|
func (k *KZGInclusionProver) VerifyRaw(
|
|
data []byte,
|
|
commit []byte,
|
|
index int,
|
|
proof []byte,
|
|
polySize uint64,
|
|
) (bool, error) {
|
|
z := kzg.RootsOfUnityBLS48581[polySize][index]
|
|
|
|
y, err := curves.BLS48581G1().NewScalar().SetBytes(data)
|
|
if err != nil {
|
|
return false, errors.Wrap(err, "verify raw")
|
|
}
|
|
|
|
c, err := curves.BLS48581G1().Point.FromAffineCompressed(commit)
|
|
if err != nil {
|
|
return false, errors.Wrap(err, "verify raw")
|
|
}
|
|
|
|
p, err := curves.BLS48581G1().Point.FromAffineCompressed(proof)
|
|
if err != nil {
|
|
return false, errors.Wrap(err, "verify raw")
|
|
}
|
|
|
|
return k.prover.Verify(
|
|
c.(curves.PairingPoint),
|
|
z,
|
|
y.(curves.PairingScalar),
|
|
p.(curves.PairingPoint),
|
|
), nil
|
|
}
|
|
|
|
var _ InclusionProver = (*KZGInclusionProver)(nil)
|