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certificate_test.go
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// Copyright (C) 2019-2021 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// go-algorand is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with go-algorand. If not, see <https://www.gnu.org/licenses/>.
package agreement
import (
"context"
"math/rand"
"os"
"testing"
"github.com/stretchr/testify/require"
"github.com/algorand/go-algorand/config"
"github.com/algorand/go-algorand/crypto"
"github.com/algorand/go-algorand/logging"
"github.com/algorand/go-algorand/protocol"
"github.com/algorand/go-algorand/test/partitiontest"
)
func makeCertTesting(digest crypto.Digest, votes []vote, equiVotes []equivocationVote) Certificate {
var proposal proposalValue
proposal.BlockDigest = digest
return makeBundle(config.Consensus[protocol.ConsensusCurrentVersion], proposal, votes, equiVotes).Certificate()
}
func verifyBundleAgainstLedger(b unauthenticatedBundle, l Ledger, avv *AsyncVoteVerifier) error {
_, err := b.verify(context.Background(), l, avv)
return err
}
func TestCertificateGoodCertificateBasic(t *testing.T) {
partitiontest.PartitionTest(t)
ledger, addresses, vrfSecrets, otSecrets := readOnlyFixture100()
round := ledger.NextRound()
period := period(0)
block := makeRandomBlock(1)
votes := make([]vote, 0)
equiVotes := make([]equivocationVote, 0)
var totalWeight uint64
for j, addr := range addresses {
vote, err := makeVoteTesting(addr, vrfSecrets[j], otSecrets[j], ledger, round, period, cert, block.Digest())
if err == nil {
votes = append(votes, vote)
totalWeight += vote.Cred.Weight
}
}
cert := makeCertTesting(block.Digest(), votes, equiVotes)
require.NotEqual(t, Certificate{}, cert)
require.NoError(t, cert.claimsToAuthenticate(block))
avv := MakeAsyncVoteVerifier(nil)
defer avv.Quit()
require.NoError(t, cert.Authenticate(block, ledger, avv))
}
func TestCertificateGoodCertificateEarlyBreak(t *testing.T) {
partitiontest.PartitionTest(t)
ledger, addresses, vrfSecrets, otSecrets := readOnlyFixture100()
round := ledger.NextRound()
period := period(0)
block := makeRandomBlock(1)
votes := make([]vote, 0)
equiVotes := make([]equivocationVote, 0)
var totalWeight uint64
for j, addr := range addresses {
vote, err := makeVoteTesting(addr, vrfSecrets[j], otSecrets[j], ledger, round, period, cert, block.Digest())
if err == nil {
votes = append(votes, vote)
totalWeight += vote.Cred.Weight
}
}
cert := makeCertTesting(block.Digest(), votes, equiVotes)
require.NotEqual(t, Certificate{}, cert)
require.NoError(t, cert.claimsToAuthenticate(block))
avv := MakeAsyncVoteVerifier(nil)
defer avv.Quit()
require.NoError(t, cert.Authenticate(block, ledger, avv))
}
func TestCertificateFinalCert(t *testing.T) {
partitiontest.PartitionTest(t)
ledger, addresses, vrfSecrets, otSecrets := readOnlyFixture100()
round := ledger.NextRound()
period := period(0)
block := makeRandomBlock(1)
votes := make([]vote, 0)
equiVotes := make([]equivocationVote, 0)
var totalWeight uint64
for j, addr := range addresses {
vote, err := makeVoteTesting(addr, vrfSecrets[j], otSecrets[j], ledger, round, period, cert, block.Digest())
if err == nil {
votes = append(votes, vote)
totalWeight += vote.Cred.Weight
}
}
cert := makeCertTesting(block.Digest(), votes, equiVotes)
require.NotEqual(t, Certificate{}, cert)
require.NoError(t, cert.claimsToAuthenticate(block))
avv := MakeAsyncVoteVerifier(nil)
defer avv.Quit()
require.NoError(t, cert.Authenticate(block, ledger, avv))
}
func TestCertificateBadCertificateWithFakeDoubleVote(t *testing.T) {
partitiontest.PartitionTest(t)
ledger, addresses, vrfSecrets, otSecrets := readOnlyFixture100()
round := ledger.NextRound()
period := period(0)
block, lastHash := makeRandomBlock(1), randomBlockHash()
votes := make([]vote, 0)
equiVotes := make([]equivocationVote, 0)
var totalWeight uint64
i := 0
for j, addr := range addresses {
vote, err := makeVoteTesting(addr, vrfSecrets[j], otSecrets[j], ledger, round, period, cert, block.Digest())
if err == nil {
if i < 30 {
votes = append(votes, vote)
} else {
v1, err1 := makeVoteTesting(addr, vrfSecrets[j], otSecrets[j], ledger, round, period, cert, lastHash)
v2, err2 := makeVoteTesting(addr, vrfSecrets[j], otSecrets[j], ledger, round, period, cert, lastHash)
require.NoError(t, err1)
require.NoError(t, err2)
// this is a faulty equivocationVote as the proposal values are the same
ev := equivocationVote{
Sender: v1.R.Sender,
Round: v1.R.Round,
Period: v1.R.Period,
Step: v1.R.Step,
Cred: v1.Cred,
Proposals: [2]proposalValue{v1.R.Proposal, v2.R.Proposal},
Sigs: [2]crypto.OneTimeSignature{v1.Sig, v2.Sig},
}
equiVotes = append(equiVotes, ev)
}
totalWeight += vote.Cred.Weight
i++
}
}
cert := makeCertTesting(block.Digest(), votes, equiVotes)
require.NotEqual(t, Certificate{}, cert)
require.NoError(t, cert.claimsToAuthenticate(block))
require.True(t, len(cert.EquivocationVotes) > 0)
require.True(t, len(cert.Votes) > 0)
avv := MakeAsyncVoteVerifier(nil)
defer avv.Quit()
require.Error(t, cert.Authenticate(block, ledger, avv))
}
func TestCertificateDifferentBlock(t *testing.T) {
partitiontest.PartitionTest(t)
ledger, addresses, vrfSecrets, otSecrets := readOnlyFixture100()
round := ledger.NextRound()
period := period(0)
block, lastHash := makeRandomBlock(1), randomBlockHash()
votes := make([]vote, 0)
equiVotes := make([]equivocationVote, 0)
var totalWeight uint64
for j, addr := range addresses {
vote, err := makeVoteTesting(addr, vrfSecrets[j], otSecrets[j], ledger, round, period, cert, lastHash)
if err == nil {
votes = append(votes, vote)
totalWeight += vote.Cred.Weight
}
}
cert := makeCertTesting(lastHash, votes, equiVotes)
bundle := unauthenticatedBundle(cert)
require.NotEqual(t, Certificate{}, cert)
require.Error(t, cert.claimsToAuthenticate(block))
avv := MakeAsyncVoteVerifier(nil)
defer avv.Quit()
require.NoError(t, verifyBundleAgainstLedger(bundle, ledger, avv))
require.Error(t, cert.Authenticate(block, ledger, avv))
}
func TestCertificateNoCertStep(t *testing.T) {
partitiontest.PartitionTest(t)
ledger, addresses, vrfSecrets, otSecrets := readOnlyFixture100()
round := ledger.NextRound()
period := period(0)
block, _ := makeRandomBlock(1), randomBlockHash()
votes := make([]vote, 0)
equiVotes := make([]equivocationVote, 0)
var totalWeight uint64
for j, addr := range addresses {
vote, err := makeVoteTesting(addr, vrfSecrets[j], otSecrets[j], ledger, round, period, next, block.Digest())
if err == nil {
votes = append(votes, vote)
totalWeight += vote.Cred.Weight
}
}
logging.Base().SetOutput(nullWriter{})
require.Panics(t, func() { makeCertTesting(block.Digest(), votes, equiVotes) })
logging.Base().SetOutput(os.Stderr)
}
func TestCertificateNotEnoughVotesToCert(t *testing.T) {
partitiontest.PartitionTest(t)
ledger, addresses, vrfSecrets, otSecrets := readOnlyFixture100()
round := ledger.NextRound()
period := period(0)
var lastHash crypto.Digest
rand.Read(lastHash[:])
votes := make([]vote, 0)
equiVotes := make([]equivocationVote, 0)
var totalWeight uint64
for j, addr := range addresses {
vote, err := makeVoteTesting(addr, vrfSecrets[j], otSecrets[j], ledger, round, period, cert, lastHash)
if err == nil {
if cert.reachesQuorum(config.Consensus[protocol.ConsensusCurrentVersion], totalWeight+vote.Cred.Weight) {
break
}
votes = append(votes, vote)
totalWeight += vote.Cred.Weight
}
}
var proposal proposalValue
proposal.BlockDigest = lastHash
logging.Base().SetOutput(nullWriter{})
require.Panics(t, func() {
makeBundle(config.Consensus[protocol.ConsensusCurrentVersion], proposal, votes, equiVotes).Certificate()
})
logging.Base().SetOutput(os.Stderr)
}
func TestCertificateCertWrongRound(t *testing.T) {
partitiontest.PartitionTest(t)
ledger, addresses, vrfSecrets, otSecrets := readOnlyFixture100()
round := ledger.NextRound()
period := period(0)
block := makeRandomBlock(1 - 1)
votes := make([]vote, 0)
equiVotes := make([]equivocationVote, 0)
var totalWeight uint64
for j, addr := range addresses {
vote, err := makeVoteTesting(addr, vrfSecrets[j], otSecrets[j], ledger, round, period, cert, block.Digest())
if err == nil {
votes = append(votes, vote)
totalWeight += vote.Cred.Weight
}
}
cert := makeCertTesting(block.Digest(), votes, equiVotes)
bundle := unauthenticatedBundle(cert)
require.NotEqual(t, Certificate{}, cert)
require.Error(t, cert.claimsToAuthenticate(block))
avv := MakeAsyncVoteVerifier(nil)
defer avv.Quit()
require.NoError(t, verifyBundleAgainstLedger(bundle, ledger, avv))
require.Error(t, cert.Authenticate(block, ledger, avv))
}
func TestCertificateCertWithTooFewVotes(t *testing.T) {
partitiontest.PartitionTest(t)
ledger, addresses, vrfSecrets, otSecrets := readOnlyFixture100()
round := ledger.NextRound()
period := period(0)
block, _ := makeRandomBlock(1), randomBlockHash()
votes := make([]vote, 0)
equiVotes := make([]equivocationVote, 0)
var totalWeight uint64
for j, addr := range addresses {
vote, err := makeVoteTesting(addr, vrfSecrets[j], otSecrets[j], ledger, round, period, cert, block.Digest())
if err == nil {
votes = append(votes, vote)
totalWeight += vote.Cred.Weight
break
}
}
var proposal proposalValue
proposal.BlockDigest = block.Digest()
logging.Base().SetOutput(nullWriter{})
require.Panics(t, func() {
makeBundle(config.Consensus[protocol.ConsensusCurrentVersion], proposal, votes, equiVotes).Certificate()
})
logging.Base().SetOutput(os.Stderr)
}
func TestCertificateDupVote(t *testing.T) {
partitiontest.PartitionTest(t)
ledger, addresses, vrfSecrets, otSecrets := readOnlyFixture100()
round := ledger.NextRound()
period := period(0)
block, _ := makeRandomBlock(1), randomBlockHash()
votes := make([]vote, 0)
equiVotes := make([]equivocationVote, 0)
var totalWeight uint64
i := 0
for j, addr := range addresses {
vote, err := makeVoteTesting(addr, vrfSecrets[j], otSecrets[j], ledger, round, period, cert, block.Digest())
if err == nil {
votes = append(votes, vote)
if i == 0 {
votes = append(votes, vote)
}
totalWeight += vote.Cred.Weight
i++
}
}
cert := makeCertTesting(block.Digest(), votes, equiVotes)
bundle := unauthenticatedBundle(cert)
require.NotEqual(t, Certificate{}, cert)
require.NoError(t, cert.claimsToAuthenticate(block))
avv := MakeAsyncVoteVerifier(nil)
defer avv.Quit()
require.Error(t, verifyBundleAgainstLedger(bundle, ledger, avv))
require.Error(t, cert.Authenticate(block, ledger, avv))
}