ceremonyclient/nekryptology/pkg/accumulator/proof_test.go

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2023-07-05 05:32:28 +00:00
//
// Copyright Coinbase, Inc. All Rights Reserved.
//
// SPDX-License-Identifier: Apache-2.0
//
package accumulator
import (
"testing"
"github.com/stretchr/testify/require"
"source.quilibrium.com/quilibrium/monorepo/nekryptology/pkg/core/curves"
)
func TestProofParamsMarshal(t *testing.T) {
curve := curves.BLS12381(&curves.PointBls12381G1{})
sk, _ := new(SecretKey).New(curve, []byte("1234567890"))
pk, _ := sk.GetPublicKey(curve)
params, err := new(ProofParams).New(curve, pk, []byte("entropy"))
require.NoError(t, err)
require.NotNil(t, params.x)
require.NotNil(t, params.y)
require.NotNil(t, params.z)
bytes, err := params.MarshalBinary()
require.NoError(t, err)
require.NotNil(t, bytes)
params2 := &ProofParams{
curve.PointG1.Generator(),
curve.PointG1.Generator(),
curve.PointG1.Generator(),
}
err = params2.UnmarshalBinary(bytes)
require.NoError(t, err)
require.True(t, params.x.Equal(params2.x))
require.True(t, params.y.Equal(params2.y))
require.True(t, params.z.Equal(params2.z))
}
func TestMembershipProof(t *testing.T) {
curve := curves.BLS12381(&curves.PointBls12381G1{})
sk, _ := new(SecretKey).New(curve, []byte("1234567890"))
pk, _ := sk.GetPublicKey(curve)
element1 := curve.Scalar.Hash([]byte("3"))
element2 := curve.Scalar.Hash([]byte("4"))
element3 := curve.Scalar.Hash([]byte("5"))
element4 := curve.Scalar.Hash([]byte("6"))
element5 := curve.Scalar.Hash([]byte("7"))
element6 := curve.Scalar.Hash([]byte("8"))
element7 := curve.Scalar.Hash([]byte("9"))
elements := []Element{element1, element2, element3, element4, element5, element6, element7}
// Initiate a new accumulator
acc, err := new(Accumulator).WithElements(curve, sk, elements)
require.NoError(t, err)
require.NotNil(t, acc.value)
// Initiate a new membership witness for value elements[3]
wit, err := new(MembershipWitness).New(elements[3], acc, sk)
require.NoError(t, err)
require.Equal(t, wit.y, elements[3])
// Create proof parameters, which contains randomly sampled G1 points X, Y, Z, K
params, err := new(ProofParams).New(curve, pk, []byte("entropy"))
require.NoError(t, err)
require.NotNil(t, params.x)
require.NotNil(t, params.y)
require.NotNil(t, params.z)
mpc, err := new(MembershipProofCommitting).New(wit, acc, params, pk)
require.NoError(t, err)
testMPC(t, mpc)
challenge := curve.Scalar.Hash(mpc.GetChallengeBytes())
require.NotNil(t, challenge)
proof := mpc.GenProof(challenge)
require.NotNil(t, proof)
testProof(t, proof)
finalProof, err := proof.Finalize(acc, params, pk, challenge)
require.NoError(t, err)
require.NotNil(t, finalProof)
testFinalProof(t, finalProof)
challenge2 := finalProof.GetChallenge(curve)
require.Equal(t, challenge, challenge2)
// Check we can still have a valid proof even if accumulator and witness are updated
data1 := curve.Scalar.Hash([]byte("1"))
data2 := curve.Scalar.Hash([]byte("2"))
data3 := curve.Scalar.Hash([]byte("3"))
data4 := curve.Scalar.Hash([]byte("4"))
data5 := curve.Scalar.Hash([]byte("5"))
data := []Element{data1, data2, data3, data4, data5}
additions := data[0:2]
deletions := data[2:5]
_, coefficients, err := acc.Update(sk, additions, deletions)
require.NoError(t, err)
require.NotNil(t, coefficients)
_, err = wit.BatchUpdate(additions, deletions, coefficients)
require.NoError(t, err)
newParams, err := new(ProofParams).New(curve, pk, []byte("entropy"))
require.NoError(t, err)
require.NotNil(t, newParams.x)
require.NotNil(t, newParams.y)
require.NotNil(t, newParams.z)
newMPC, err := new(MembershipProofCommitting).New(wit, acc, newParams, pk)
require.NoError(t, err)
testMPC(t, newMPC)
challenge3 := curve.Scalar.Hash(newMPC.GetChallengeBytes())
require.NotNil(t, challenge3)
newProof := newMPC.GenProof(challenge3)
require.NotNil(t, newProof)
testProof(t, newProof)
newFinalProof, err := newProof.Finalize(acc, newParams, pk, challenge3)
require.NoError(t, err)
require.NotNil(t, newFinalProof)
testFinalProof(t, newFinalProof)
challenge4 := newFinalProof.GetChallenge(curve)
require.Equal(t, challenge3, challenge4)
}
func testMPC(t *testing.T, mpc *MembershipProofCommitting) {
require.NotNil(t, mpc.eC)
require.NotNil(t, mpc.tSigma)
require.NotNil(t, mpc.tRho)
require.NotNil(t, mpc.deltaSigma)
require.NotNil(t, mpc.deltaRho)
require.NotNil(t, mpc.blindingFactor)
require.NotNil(t, mpc.rSigma)
require.NotNil(t, mpc.rRho)
require.NotNil(t, mpc.rDeltaSigma)
require.NotNil(t, mpc.rDeltaRho)
require.NotNil(t, mpc.sigma)
require.NotNil(t, mpc.rho)
require.NotNil(t, mpc.capRSigma)
require.NotNil(t, mpc.capRRho)
require.NotNil(t, mpc.capRDeltaSigma)
require.NotNil(t, mpc.capRDeltaRho)
require.NotNil(t, mpc.capRE)
require.NotNil(t, mpc.accumulator)
require.NotNil(t, mpc.witnessValue)
require.NotNil(t, mpc.xG1)
require.NotNil(t, mpc.yG1)
require.NotNil(t, mpc.zG1)
}
func testProof(t *testing.T, proof *MembershipProof) {
require.NotNil(t, proof.eC)
require.NotNil(t, proof.tSigma)
require.NotNil(t, proof.tRho)
require.NotNil(t, proof.sSigma)
require.NotNil(t, proof.sRho)
require.NotNil(t, proof.sDeltaSigma)
require.NotNil(t, proof.sDeltaRho)
require.NotNil(t, proof.sY)
}
func testFinalProof(t *testing.T, finalProof *MembershipProofFinal) {
require.NotNil(t, finalProof.accumulator)
require.NotNil(t, finalProof.eC)
require.NotNil(t, finalProof.tSigma)
require.NotNil(t, finalProof.tRho)
require.NotNil(t, finalProof.capRE)
require.NotNil(t, finalProof.capRSigma)
require.NotNil(t, finalProof.capRRho)
require.NotNil(t, finalProof.capRDeltaSigma)
require.NotNil(t, finalProof.capRDeltaRho)
}