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/*
Copyright IBM Corp. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/
package idemix
import (
"github.com/hyperledger/fabric-amcl/amcl/FP256BN"
"github.com/pkg/errors"
)
// nonRevokedProver is the Verifier of the ZK proof system that handles revocation.
type nonRevocationVerifier interface {
// recomputeFSContribution recomputes the contribution of the non-revocation proof to the ZKP challenge
recomputeFSContribution(proof *NonRevocationProof, chal *FP256BN.BIG, epochPK *FP256BN.ECP2, proofSRh *FP256BN.BIG) ([]byte, error)
}
// nopNonRevocationVerifier is an empty nonRevocationVerifier that produces an empty contribution
type nopNonRevocationVerifier struct{}
func (verifier *nopNonRevocationVerifier) recomputeFSContribution(proof *NonRevocationProof, chal *FP256BN.BIG, epochPK *FP256BN.ECP2, proofSRh *FP256BN.BIG) ([]byte, error) {
return nil, nil
}
// getNonRevocationVerifier returns the nonRevocationVerifier bound to the passed revocation algorithm
func getNonRevocationVerifier(algorithm RevocationAlgorithm) (nonRevocationVerifier, error) {
switch algorithm {
case ALG_NO_REVOCATION:
return &nopNonRevocationVerifier{}, nil
default:
// unknown revocation algorithm
return nil, errors.Errorf("unknown revocation algorithm %d", algorithm)
}
}
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