mirror of
https://source.quilibrium.com/quilibrium/ceremonyclient.git
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405 lines
13 KiB
Go
405 lines
13 KiB
Go
//
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// Copyright Coinbase, Inc. All Rights Reserved.
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//
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// SPDX-License-Identifier: Apache-2.0
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//
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package frost
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import (
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"testing"
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"github.com/stretchr/testify/require"
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"source.quilibrium.com/quilibrium/monorepo/nekryptology/pkg/core/curves"
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dkg "source.quilibrium.com/quilibrium/monorepo/nekryptology/pkg/dkg/frost"
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"source.quilibrium.com/quilibrium/monorepo/nekryptology/pkg/sharing"
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)
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var (
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testCurve = curves.ED25519()
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ctx = "string to prevent replay attack"
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)
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// Create two DKG participants.
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func PrepareDkgOutput(t *testing.T) (*dkg.DkgParticipant, *dkg.DkgParticipant) {
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// Initiate two participants and running DKG round 1
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p1, err := dkg.NewDkgParticipant(1, 2, ctx, testCurve, 2)
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require.NoError(t, err)
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p2, err := dkg.NewDkgParticipant(2, 2, ctx, testCurve, 1)
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require.NoError(t, err)
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bcast1, p2psend1, _ := p1.Round1(nil)
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bcast2, p2psend2, _ := p2.Round1(nil)
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bcast := make(map[uint32]*dkg.Round1Bcast)
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p2p1 := make(map[uint32]*sharing.ShamirShare)
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p2p2 := make(map[uint32]*sharing.ShamirShare)
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bcast[1] = bcast1
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bcast[2] = bcast2
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p2p1[2] = p2psend2[1]
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p2p2[1] = p2psend1[2]
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// Running DKG round 2
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_, _ = p1.Round2(bcast, p2p1)
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_, _ = p2.Round2(bcast, p2p2)
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return p1, p2
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}
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// Test FROST signing round 1
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func TestSignRound1Works(t *testing.T) {
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p1, p2 := PrepareDkgOutput(t)
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require.NotNil(t, p1)
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require.NotNil(t, p2)
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scheme, _ := sharing.NewShamir(2, 2, testCurve)
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lCoeffs, err := scheme.LagrangeCoeffs([]uint32{p1.Id, p2.Id})
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require.NoError(t, err)
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signer1, err := NewSigner(p1, 1, 2, lCoeffs, []uint32{1, 2}, &Ed25519ChallengeDeriver{})
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require.NoError(t, err)
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round1Out, _ := signer1.SignRound1()
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require.NotNil(t, round1Out.Ei)
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require.NotNil(t, round1Out.Di)
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require.NotNil(t, signer1.state.smallE)
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require.NotNil(t, signer1.state.smallD)
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require.NotNil(t, signer1.state.capD)
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require.NotNil(t, signer1.state.capE)
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require.Equal(t, signer1.round, uint(2))
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require.Equal(t, signer1.cosigners, []uint32{1, 2})
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}
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func TestSignRound1RepeatCall(t *testing.T) {
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p1, p2 := PrepareDkgOutput(t)
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scheme, _ := sharing.NewShamir(2, 2, testCurve)
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lCoeffs, err := scheme.LagrangeCoeffs([]uint32{p1.Id, p2.Id})
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require.NoError(t, err)
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signer1, _ := NewSigner(p1, 1, 2, lCoeffs, []uint32{1, 2}, &Ed25519ChallengeDeriver{})
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_, err = signer1.SignRound1()
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require.NoError(t, err)
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_, err = signer1.SignRound1()
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require.Error(t, err)
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}
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func PrepareNewSigners(t *testing.T) (*Signer, *Signer) {
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threshold := uint32(2)
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limit := uint32(2)
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p1, p2 := PrepareDkgOutput(t)
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require.Equal(t, p1.VerificationKey, p2.VerificationKey)
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scheme, err := sharing.NewShamir(threshold, limit, testCurve)
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// field = sharing.NewField(p1.curve.Params().N)
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require.NotNil(t, scheme)
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require.NoError(t, err)
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lCoeffs, err := scheme.LagrangeCoeffs([]uint32{p1.Id, p2.Id})
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require.NotNil(t, lCoeffs[1])
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require.NotNil(t, lCoeffs[2])
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require.NoError(t, err)
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signer1, err := NewSigner(p1, p1.Id, threshold, lCoeffs, []uint32{p1.Id, p2.Id}, &Ed25519ChallengeDeriver{})
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require.NotNil(t, signer1)
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require.NoError(t, err)
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signer2, err := NewSigner(p2, p2.Id, threshold, lCoeffs, []uint32{p1.Id, p2.Id}, &Ed25519ChallengeDeriver{})
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require.NotNil(t, signer2)
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require.NoError(t, err)
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return signer1, signer2
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}
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func TestSignRound2Works(t *testing.T) {
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// Preparing round 2 inputs
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signer1, signer2 := PrepareNewSigners(t)
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require.Equal(t, signer1.verificationKey, signer2.verificationKey)
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require.NotNil(t, signer1)
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require.NotNil(t, signer2)
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round1Out1, _ := signer1.SignRound1()
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round1Out2, _ := signer2.SignRound1()
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round2Input := make(map[uint32]*Round1Bcast)
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round2Input[signer1.id] = round1Out1
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round2Input[signer2.id] = round1Out2
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// Actual Test
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msg := []byte("message")
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round2Out, err := signer1.SignRound2(msg, round2Input)
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require.NotNil(t, round2Out)
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require.NoError(t, err)
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require.Equal(t, signer1.round, uint(3))
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require.NotNil(t, signer1.state.commitments)
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require.Equal(t, signer1.state.msg, msg)
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require.True(t, signer1.state.smallD.IsZero())
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require.True(t, signer1.state.smallE.IsZero())
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}
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func TestSignRound2RepeatCall(t *testing.T) {
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// Preparing round 2 inputs
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signer1, signer2 := PrepareNewSigners(t)
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require.NotNil(t, signer1)
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require.NotNil(t, signer2)
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round1Out1, _ := signer1.SignRound1()
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round1Out2, _ := signer2.SignRound1()
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round2Input := make(map[uint32]*Round1Bcast)
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round2Input[signer1.id] = round1Out1
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round2Input[signer2.id] = round1Out2
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// Actual Test
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msg := []byte("message")
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_, err := signer1.SignRound2(msg, round2Input)
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require.NoError(t, err)
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_, err = signer1.SignRound2(msg, round2Input)
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require.Error(t, err)
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}
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func TestSignRound2BadInput(t *testing.T) {
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// Preparing round 2 inputs
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signer1, signer2 := PrepareNewSigners(t)
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_, _ = signer1.SignRound1()
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round1Out2, _ := signer2.SignRound1()
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round2Input := make(map[uint32]*Round1Bcast)
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// Actual Test: Set an input to nil
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round2Input[signer1.id] = nil
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round2Input[signer2.id] = round1Out2
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msg := []byte("message")
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_, err := signer1.SignRound2(msg, round2Input)
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require.Error(t, err)
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// Preparing round 2 inputs
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signer1, signer2 = PrepareNewSigners(t)
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round1Out1, _ := signer1.SignRound1()
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round1Out2, _ = signer2.SignRound1()
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round2Input = make(map[uint32]*Round1Bcast)
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round2Input[signer1.id] = round1Out1
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round2Input[signer2.id] = round1Out2
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// Actual Test: Nil message
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_, err = signer1.SignRound2(nil, round2Input)
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require.Error(t, err)
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// Preparing round 2 inputs
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signer1, signer2 = PrepareNewSigners(t)
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round1Out1, _ = signer1.SignRound1()
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round1Out2, _ = signer2.SignRound1()
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round2Input = make(map[uint32]*Round1Bcast)
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// Actual Test: Set invalid round2Input length
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round2Input[signer1.id] = round1Out1
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round2Input[signer2.id] = round1Out2
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round2Input[3] = round1Out2
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_, err = signer1.SignRound2(msg, round2Input)
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require.Error(t, err)
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// Preparing round 2 inputs
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signer1, signer2 = PrepareNewSigners(t)
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round1Out1, _ = signer1.SignRound1()
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round1Out2, _ = signer2.SignRound1()
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round2Input = make(map[uint32]*Round1Bcast)
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// Actual Test: Set invalid round2Input length
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round1Out2.Ei = nil
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round2Input[signer1.id] = round1Out1
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round2Input[signer2.id] = round1Out2
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_, err = signer1.SignRound2(msg, round2Input)
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require.Error(t, err)
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// Preparing round 2 inputs
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signer1, signer2 = PrepareNewSigners(t)
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round1Out1, _ = signer1.SignRound1()
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round1Out2, _ = signer2.SignRound1()
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round2Input = make(map[uint32]*Round1Bcast)
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round2Input[signer1.id] = round1Out1
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round2Input[signer2.id] = round1Out2
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// Actual Test: Set nil smallD and smallE
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signer1.state.smallD = testCurve.NewScalar()
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signer1.state.smallE = nil
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_, err = signer1.SignRound2(msg, round2Input)
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require.Error(t, err)
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}
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func PrepareRound3Input(t *testing.T) (*Signer, *Signer, map[uint32]*Round2Bcast) {
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// Running sign round 1
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threshold := uint32(2)
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limit := uint32(2)
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p1, p2 := PrepareDkgOutput(t)
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require.Equal(t, p1.VerificationKey, p2.VerificationKey)
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scheme, err := sharing.NewShamir(threshold, limit, testCurve)
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require.NotNil(t, scheme)
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require.NoError(t, err)
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lCoeffs, err := scheme.LagrangeCoeffs([]uint32{p1.Id, p2.Id})
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require.NotNil(t, lCoeffs[1])
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require.NotNil(t, lCoeffs[2])
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require.NoError(t, err)
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signer1, err := NewSigner(p1, p1.Id, threshold, lCoeffs, []uint32{p1.Id, p2.Id}, &Ed25519ChallengeDeriver{})
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require.NotNil(t, signer1)
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require.NoError(t, err)
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signer2, err := NewSigner(p2, p2.Id, threshold, lCoeffs, []uint32{p1.Id, p2.Id}, &Ed25519ChallengeDeriver{})
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require.NotNil(t, signer2)
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require.NoError(t, err)
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round1Out1, _ := signer1.SignRound1()
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round1Out2, _ := signer2.SignRound1()
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round2Input := make(map[uint32]*Round1Bcast, threshold)
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round2Input[signer1.id] = round1Out1
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round2Input[signer2.id] = round1Out2
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// Running sign round 2
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msg := []byte("message")
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round2Out1, _ := signer1.SignRound2(msg, round2Input)
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round2Out2, _ := signer2.SignRound2(msg, round2Input)
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round3Input := make(map[uint32]*Round2Bcast, threshold)
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round3Input[signer1.id] = round2Out1
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round3Input[signer2.id] = round2Out2
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return signer1, signer2, round3Input
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}
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func TestSignRound3Works(t *testing.T) {
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signer1, signer2, round3Input := PrepareRound3Input(t)
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round3Out1, err := signer1.SignRound3(round3Input)
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require.NoError(t, err)
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require.NotNil(t, round3Out1)
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round3Out2, err := signer2.SignRound3(round3Input)
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require.NoError(t, err)
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require.NotNil(t, round3Out2)
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// signer1 and signer2 outputs the same signature
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require.Equal(t, round3Out1.Z, round3Out2.Z)
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require.Equal(t, round3Out1.C, round3Out2.C)
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// test verify method
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msg := []byte("message")
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signature := &Signature{
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round3Out1.Z,
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round3Out1.C,
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}
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vk := signer1.verificationKey
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ok, err := Verify(signer1.curve, signer1.challengeDeriver, vk, msg, signature)
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require.True(t, ok)
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require.NoError(t, err)
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ok, err = Verify(signer2.curve, signer2.challengeDeriver, vk, msg, signature)
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require.True(t, ok)
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require.NoError(t, err)
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}
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func TestSignRound3RepeatCall(t *testing.T) {
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signer1, _, round3Input := PrepareRound3Input(t)
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_, err := signer1.SignRound3(round3Input)
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require.NoError(t, err)
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_, err = signer1.SignRound3(round3Input)
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require.Error(t, err)
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}
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func TestSignRound3BadInput(t *testing.T) {
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signer1, _, round3Input := PrepareRound3Input(t)
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// Actual test: nil input
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round3Input[signer1.id] = nil
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_, err := signer1.SignRound3(round3Input)
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require.Error(t, err)
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round3Input = nil
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_, err = signer1.SignRound3(round3Input)
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require.Error(t, err)
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// Actual test: set invalid length of round3Input
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signer1, _, round3Input = PrepareRound3Input(t)
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round3Input[100] = round3Input[signer1.id]
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_, err = signer1.SignRound3(round3Input)
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require.Error(t, err)
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// Actual test: maul the round3Input
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signer1, _, round3Input = PrepareRound3Input(t)
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round3Input[signer1.id].Zi = round3Input[signer1.id].Zi.Add(testCurve.Scalar.New(2))
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_, err = signer1.SignRound3(round3Input)
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require.Error(t, err)
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// Actual test: set non-zero smallD and smallE
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signer1, _, round3Input = PrepareRound3Input(t)
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signer1.state.smallD = testCurve.Scalar.New(1)
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_, err = signer1.SignRound3(round3Input)
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require.Error(t, err)
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}
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func TestFullRoundsWorks(t *testing.T) {
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// Give a full-round test (FROST DKG + FROST Signing) with threshold = 2 and limit = 3, same as the test of tECDSA
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threshold := 2
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limit := 3
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// Prepare DKG participants
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participants := make(map[uint32]*dkg.DkgParticipant, limit)
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for i := 1; i <= limit; i++ {
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otherIds := make([]uint32, limit-1)
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idx := 0
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for j := 1; j <= limit; j++ {
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if i == j {
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continue
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}
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otherIds[idx] = uint32(j)
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idx++
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}
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p, err := dkg.NewDkgParticipant(uint32(i), uint32(threshold), ctx, testCurve, otherIds...)
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require.NoError(t, err)
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participants[uint32(i)] = p
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}
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// FROST DKG round 1
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rnd1Bcast := make(map[uint32]*dkg.Round1Bcast, len(participants))
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rnd1P2p := make(map[uint32]dkg.Round1P2PSend, len(participants))
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for id, p := range participants {
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bcast, p2psend, err := p.Round1(nil)
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require.NoError(t, err)
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rnd1Bcast[id] = bcast
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rnd1P2p[id] = p2psend
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}
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// FROST DKG round 2
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for id := range rnd1Bcast {
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rnd1P2pForP := make(map[uint32]*sharing.ShamirShare)
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for jid := range rnd1P2p {
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if jid == id {
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continue
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}
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rnd1P2pForP[jid] = rnd1P2p[jid][id]
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}
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_, err := participants[id].Round2(rnd1Bcast, rnd1P2pForP)
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require.NoError(t, err)
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}
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// Prepare Lagrange coefficients
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scheme, _ := sharing.NewShamir(uint32(threshold), uint32(limit), testCurve)
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// Here we use {1, 3} as 2 of 3 cosigners, we can also set cosigners as {1, 2}, {2, 3}
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signerIds := []uint32{1, 3}
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lCoeffs, err := scheme.LagrangeCoeffs(signerIds)
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require.NoError(t, err)
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signers := make(map[uint32]*Signer, threshold)
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for _, id := range signerIds {
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signers[id], err = NewSigner(participants[id], id, uint32(threshold), lCoeffs, signerIds, &Ed25519ChallengeDeriver{})
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require.NoError(t, err)
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require.NotNil(t, signers[id].skShare)
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}
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// Running sign round 1
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round2Input := make(map[uint32]*Round1Bcast, threshold)
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for id := range signers {
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round1Out, err := signers[id].SignRound1()
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require.NoError(t, err)
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round2Input[signers[id].id] = round1Out
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}
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// Running sign round 2
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msg := []byte("message")
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round3Input := make(map[uint32]*Round2Bcast, threshold)
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for id := range signers {
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round2Out, err := signers[id].SignRound2(msg, round2Input)
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require.NoError(t, err)
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round3Input[signers[id].id] = round2Out
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}
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// Running sign round 3
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result := make(map[uint32]*Round3Bcast, threshold)
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for id := range signers {
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round3Out, err := signers[id].SignRound3(round3Input)
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require.NoError(t, err)
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result[signers[id].id] = round3Out
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}
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// Every signer has the same output Schnorr signature
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require.Equal(t, result[1].Z, result[3].Z)
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// require.Equal(t, z, result[3].Z)
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require.Equal(t, result[1].C, result[3].C)
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// require.Equal(t, c, result[3].C)
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}
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