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package evidence
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import (
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"os"
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"testing"
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"time"
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"github.com/gogo/protobuf/proto"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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dbm "github.com/tendermint/tm-db"
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"github.com/tendermint/tendermint/crypto/tmhash"
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"github.com/tendermint/tendermint/libs/bytes"
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"github.com/tendermint/tendermint/libs/log"
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tmrand "github.com/tendermint/tendermint/libs/rand"
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tmproto "github.com/tendermint/tendermint/proto/tendermint/types"
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sm "github.com/tendermint/tendermint/state"
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"github.com/tendermint/tendermint/store"
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"github.com/tendermint/tendermint/types"
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tmtime "github.com/tendermint/tendermint/types/time"
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)
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func TestMain(m *testing.M) {
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code := m.Run()
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os.Exit(code)
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}
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const evidenceChainID = "test_chain"
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func TestEvidencePool(t *testing.T) {
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var (
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val = types.NewMockPV()
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valAddr = val.PrivKey.PubKey().Address()
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height = int64(52)
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stateDB = initializeValidatorState(val, height)
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evidenceDB = dbm.NewMemDB()
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blockStoreDB = dbm.NewMemDB()
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blockStore = initializeBlockStore(blockStoreDB, sm.LoadState(stateDB), valAddr)
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evidenceTime = time.Date(2019, 1, 1, 0, 0, 0, 0, time.UTC)
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goodEvidence = types.NewMockDuplicateVoteEvidenceWithValidator(height, evidenceTime, val, evidenceChainID)
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badEvidence = types.NewMockDuplicateVoteEvidenceWithValidator(1, evidenceTime, val, evidenceChainID)
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)
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pool, err := NewPool(stateDB, evidenceDB, blockStore)
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require.NoError(t, err)
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// bad evidence
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err = pool.AddEvidence(badEvidence)
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if assert.Error(t, err) {
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assert.Contains(t, err.Error(), "is too old; min height is 32 and evidence can not be older than")
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}
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assert.False(t, pool.IsPending(badEvidence))
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assert.True(t, pool.IsEvidenceExpired(badEvidence))
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// good evidence
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evAdded := make(chan struct{})
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go func() {
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<-pool.EvidenceWaitChan()
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close(evAdded)
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}()
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err = pool.AddEvidence(goodEvidence)
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require.NoError(t, err)
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select {
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case <-evAdded:
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case <-time.After(5 * time.Second):
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t.Fatal("evidence was not added to list after 5s")
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}
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assert.Equal(t, 1, pool.evidenceList.Len())
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// if we send it again, it shouldnt add and return an error
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err = pool.AddEvidence(goodEvidence)
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assert.NoError(t, err)
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assert.Equal(t, 1, pool.evidenceList.Len())
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}
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func TestProposingAndCommittingEvidence(t *testing.T) {
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var (
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val = types.NewMockPV()
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height = int64(1)
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stateDB = initializeValidatorState(val, height)
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evidenceDB = dbm.NewMemDB()
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blockStoreDB = dbm.NewMemDB()
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blockStore = initializeBlockStore(blockStoreDB, sm.LoadState(stateDB), val.PrivKey.PubKey().Address())
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evidenceTime = time.Date(2019, 1, 1, 0, 0, 0, 0, time.UTC)
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)
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pool, err := NewPool(stateDB, evidenceDB, blockStore)
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require.NoError(t, err)
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// evidence not seen yet:
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evidence := types.NewMockDuplicateVoteEvidenceWithValidator(height, evidenceTime, val, evidenceChainID)
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assert.False(t, pool.IsCommitted(evidence))
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// evidence seen but not yet committed:
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assert.NoError(t, pool.AddEvidence(evidence))
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assert.False(t, pool.IsCommitted(evidence))
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// test evidence is proposed
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proposedEvidence := pool.AllPendingEvidence()
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assert.Equal(t, proposedEvidence[0], evidence)
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// evidence seen and committed:
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pool.MarkEvidenceAsCommitted(height, proposedEvidence)
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assert.True(t, pool.IsCommitted(evidence))
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assert.False(t, pool.IsPending(evidence))
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assert.Equal(t, 0, pool.evidenceList.Len())
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// evidence should
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}
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func TestAddEvidence(t *testing.T) {
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var (
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val = types.NewMockPV()
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valAddr = val.PrivKey.PubKey().Address()
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height = int64(30)
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stateDB = initializeValidatorState(val, height)
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evidenceDB = dbm.NewMemDB()
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blockStoreDB = dbm.NewMemDB()
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blockStore = initializeBlockStore(blockStoreDB, sm.LoadState(stateDB), valAddr)
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evidenceTime = time.Date(2019, 1, 1, 0, 0, 0, 0, time.UTC)
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)
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pool, err := NewPool(stateDB, evidenceDB, blockStore)
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require.NoError(t, err)
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testCases := []struct {
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evHeight int64
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evTime time.Time
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expErr bool
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evDescription string
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}{
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{height, time.Now(), false, "valid evidence"},
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{height, evidenceTime, false, "valid evidence (despite old time)"},
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{int64(1), time.Now(), false, "valid evidence (despite old height)"},
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{int64(1), evidenceTime, true,
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"evidence from height 1 (created at: 2019-01-01 00:00:00 +0000 UTC) is too old"},
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}
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for _, tc := range testCases {
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tc := tc
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t.Run(tc.evDescription, func(t *testing.T) {
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ev := types.NewMockDuplicateVoteEvidence(tc.evHeight, tc.evTime, evidenceChainID)
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err := pool.AddEvidence(ev)
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if tc.expErr {
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assert.Error(t, err)
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t.Log(err)
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}
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})
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}
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}
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func TestEvidencePoolUpdate(t *testing.T) {
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var (
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val = types.NewMockPV()
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valAddr = val.PrivKey.PubKey().Address()
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height = int64(21)
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stateDB = initializeValidatorState(val, height)
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evidenceDB = dbm.NewMemDB()
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blockStoreDB = dbm.NewMemDB()
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state = sm.LoadState(stateDB)
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blockStore = initializeBlockStore(blockStoreDB, state, valAddr)
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)
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pool, err := NewPool(stateDB, evidenceDB, blockStore)
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require.NoError(t, err)
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// create new block (no need to save it to blockStore)
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evidence := types.NewMockDuplicateVoteEvidence(height, time.Now(), evidenceChainID)
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lastCommit := makeCommit(height, valAddr)
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block := types.MakeBlock(height+1, []types.Tx{}, lastCommit, []types.Evidence{evidence})
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// update state (partially)
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state.LastBlockHeight = height + 1
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pool.Update(block, state)
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// a) Update marks evidence as committed
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assert.True(t, pool.IsCommitted(evidence))
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// b) Update updates valToLastHeight map
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assert.Equal(t, height+1, pool.ValidatorLastHeight(valAddr))
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}
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func TestEvidencePoolNewPool(t *testing.T) {
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var (
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val = types.NewMockPV()
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valAddr = val.PrivKey.PubKey().Address()
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height = int64(1)
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stateDB = initializeValidatorState(val, height)
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evidenceDB = dbm.NewMemDB()
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blockStoreDB = dbm.NewMemDB()
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state = sm.LoadState(stateDB)
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blockStore = initializeBlockStore(blockStoreDB, state, valAddr)
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)
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pool, err := NewPool(stateDB, evidenceDB, blockStore)
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require.NoError(t, err)
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assert.Equal(t, height, pool.ValidatorLastHeight(valAddr))
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assert.EqualValues(t, 0, pool.ValidatorLastHeight([]byte("non-existent-validator")))
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}
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func TestAddingAndPruningPOLC(t *testing.T) {
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var (
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val = types.NewMockPV()
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valAddr = val.PrivKey.PubKey().Address()
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stateDB = initializeValidatorState(val, 1)
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evidenceDB = dbm.NewMemDB()
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blockStoreDB = dbm.NewMemDB()
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state = sm.LoadState(stateDB)
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blockStore = initializeBlockStore(blockStoreDB, state, valAddr)
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height = state.ConsensusParams.Evidence.MaxAgeNumBlocks * 2
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evidenceTime = time.Date(2019, 1, 1, 0, 0, 0, 0, time.UTC)
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firstBlockID = types.BlockID{
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Hash: tmrand.Bytes(tmhash.Size),
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PartSetHeader: types.PartSetHeader{
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Total: 1,
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Hash: tmrand.Bytes(tmhash.Size),
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},
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}
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)
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voteA := makeVote(1, 1, 0, val.PrivKey.PubKey().Address(), firstBlockID, evidenceTime)
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vA := voteA.ToProto()
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err := val.SignVote(evidenceChainID, vA)
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require.NoError(t, err)
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voteA.Signature = vA.Signature
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pubKey, _ := types.NewMockPV().GetPubKey()
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polc := &types.ProofOfLockChange{
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Votes: []*types.Vote{voteA},
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PubKey: pubKey,
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}
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pool, err := NewPool(stateDB, evidenceDB, blockStore)
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require.NoError(t, err)
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err = pool.AddPOLC(polc)
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assert.NoError(t, err)
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// should be able to retrieve polc
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newPolc, err := pool.RetrievePOLC(1, 1)
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assert.NoError(t, err)
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assert.True(t, polc.Equal(newPolc))
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// should not be able to retrieve because it doesn't exist
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emptyPolc, err := pool.RetrievePOLC(2, 1)
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assert.NoError(t, err)
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assert.Nil(t, emptyPolc)
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lastCommit := makeCommit(height-1, valAddr)
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block := types.MakeBlock(height, []types.Tx{}, lastCommit, []types.Evidence{})
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// update state (partially)
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state.LastBlockHeight = height
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pool.state.LastBlockHeight = height
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// update should prune the polc
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pool.Update(block, state)
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emptyPolc, err = pool.RetrievePOLC(1, 1)
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assert.NoError(t, err)
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assert.Nil(t, emptyPolc)
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}
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func TestRecoverPendingEvidence(t *testing.T) {
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var (
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val = types.NewMockPV()
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valAddr = val.PrivKey.PubKey().Address()
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height = int64(30)
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stateDB = initializeValidatorState(val, height)
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evidenceDB = dbm.NewMemDB()
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blockStoreDB = dbm.NewMemDB()
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state = sm.LoadState(stateDB)
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blockStore = initializeBlockStore(blockStoreDB, state, valAddr)
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evidenceTime = time.Date(2019, 1, 1, 0, 0, 0, 0, time.UTC)
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goodEvidence = types.NewMockDuplicateVoteEvidenceWithValidator(height, time.Now(), val, evidenceChainID)
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expiredEvidence = types.NewMockDuplicateVoteEvidenceWithValidator(int64(1), evidenceTime, val, evidenceChainID)
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)
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// load good evidence
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goodKey := keyPending(goodEvidence)
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evi, err := types.EvidenceToProto(goodEvidence)
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require.NoError(t, err)
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goodEvidenceBytes, err := proto.Marshal(evi)
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require.NoError(t, err)
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_ = evidenceDB.Set(goodKey, goodEvidenceBytes)
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// load expired evidence
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expiredKey := keyPending(expiredEvidence)
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eevi, err := types.EvidenceToProto(expiredEvidence)
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require.NoError(t, err)
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expiredEvidenceBytes, err := proto.Marshal(eevi)
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require.NoError(t, err)
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_ = evidenceDB.Set(expiredKey, expiredEvidenceBytes)
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pool, err := NewPool(stateDB, evidenceDB, blockStore)
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require.NoError(t, err)
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assert.Equal(t, 1, pool.evidenceList.Len())
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assert.True(t, pool.IsPending(goodEvidence))
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}
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// Comprehensive set of test cases relating to the adding, upgrading and overall
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// processing of PotentialAmnesiaEvidence and AmnesiaEvidence
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func TestAddingPotentialAmnesiaEvidence(t *testing.T) {
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var (
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val = types.NewMockPV()
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val2 = types.NewMockPV()
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pubKey = val.PrivKey.PubKey()
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pubKey2 = val2.PrivKey.PubKey()
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valSet = &types.ValidatorSet{
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Validators: []*types.Validator{
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val.ExtractIntoValidator(1),
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val2.ExtractIntoValidator(3),
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},
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Proposer: val.ExtractIntoValidator(1),
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}
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height = int64(30)
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stateDB = initializeStateFromValidatorSet(valSet, height)
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evidenceDB = dbm.NewMemDB()
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blockStoreDB = dbm.NewMemDB()
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state = sm.LoadState(stateDB)
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blockStore = initializeBlockStore(blockStoreDB, state, pubKey.Address())
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//evidenceTime = time.Date(2019, 1, 1, 0, 0, 0, 0, time.UTC)
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firstBlockID = types.BlockID{
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Hash: []byte("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"),
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PartSetHeader: types.PartSetHeader{
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Total: 1,
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Hash: []byte("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"),
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},
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}
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secondBlockID = types.BlockID{
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Hash: []byte("bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"),
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PartSetHeader: types.PartSetHeader{
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Total: 1,
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Hash: []byte("bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"),
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},
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}
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evidenceTime = time.Date(2019, 1, 1, 0, 0, 0, 0, time.UTC)
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)
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// TEST SETUP
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pool, err := NewPool(stateDB, evidenceDB, blockStore)
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require.NoError(t, err)
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pool.SetLogger(log.TestingLogger())
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voteA := makeVote(height, 0, 0, pubKey.Address(), firstBlockID, evidenceTime)
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vA := voteA.ToProto()
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err = val.SignVote(evidenceChainID, vA)
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voteA.Signature = vA.Signature
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require.NoError(t, err)
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voteB := makeVote(height, 1, 0, pubKey.Address(), secondBlockID, evidenceTime.Add(3*time.Second))
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vB := voteB.ToProto()
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err = val.SignVote(evidenceChainID, vB)
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voteB.Signature = vB.Signature
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require.NoError(t, err)
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voteC := makeVote(height, 2, 0, pubKey.Address(), firstBlockID, evidenceTime.Add(2*time.Second))
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vC := voteC.ToProto()
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err = val.SignVote(evidenceChainID, vC)
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voteC.Signature = vC.Signature
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require.NoError(t, err)
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ev := &types.PotentialAmnesiaEvidence{
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VoteA: voteA,
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VoteB: voteB,
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}
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polc := &types.ProofOfLockChange{
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Votes: []*types.Vote{voteB},
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PubKey: pubKey2,
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}
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err = pool.AddPOLC(polc)
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require.NoError(t, err)
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polc, err = pool.RetrievePOLC(height, 1)
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require.NoError(t, err)
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require.NotEmpty(t, polc)
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secondValVote := makeVote(height, 1, 0, pubKey2.Address(), secondBlockID, evidenceTime.Add(1*time.Second))
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vv2 := secondValVote.ToProto()
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err = val2.SignVote(evidenceChainID, vv2)
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require.NoError(t, err)
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secondValVote.Signature = vv2.Signature
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validPolc := &types.ProofOfLockChange{
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Votes: []*types.Vote{secondValVote},
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PubKey: pubKey,
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}
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// CASE A
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pool.logger.Info("CASE A")
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// we expect the evidence pool to find the polc but log an error as the polc is not valid -> vote was
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// not from a validator in this set. However, an error isn't thrown because the evidence pool
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// should still be able to save the regular potential amnesia evidence.
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err = pool.AddEvidence(ev)
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assert.NoError(t, err)
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// evidence requires trial period until it is available -> we expect no evidence to be returned
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assert.Equal(t, 0, len(pool.PendingEvidence(1)))
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assert.True(t, pool.IsOnTrial(ev))
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nextHeight := pool.nextEvidenceTrialEndedHeight
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assert.Greater(t, nextHeight, int64(0))
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// CASE B
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pool.logger.Info("CASE B")
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// evidence is not ready to be upgraded so we return the height we expect the evidence to be.
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nextHeight = pool.upgradePotentialAmnesiaEvidence()
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assert.Equal(t, height+pool.state.ConsensusParams.Evidence.ProofTrialPeriod, nextHeight)
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// CASE C
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pool.logger.Info("CASE C")
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// now evidence is ready to be upgraded to amnesia evidence -> we expect -1 to be the next height as their is
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// no more pending potential amnesia evidence left
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lastCommit := makeCommit(height+1, pubKey.Address())
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block := types.MakeBlock(height+2, []types.Tx{}, lastCommit, []types.Evidence{})
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state.LastBlockHeight = height + 2
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pool.Update(block, state)
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assert.Equal(t, int64(-1), pool.nextEvidenceTrialEndedHeight)
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assert.Equal(t, 1, len(pool.PendingEvidence(1)))
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// CASE D
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pool.logger.Info("CASE D")
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// evidence of voting back in the past which is instantly punishable -> amnesia evidence is made directly
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ev2 := &types.PotentialAmnesiaEvidence{
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VoteA: voteC,
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VoteB: voteB,
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}
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err = pool.AddEvidence(ev2)
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assert.NoError(t, err)
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expectedAe := &types.AmnesiaEvidence{
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PotentialAmnesiaEvidence: ev2,
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Polc: types.NewEmptyPOLC(),
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}
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assert.True(t, pool.IsPending(expectedAe))
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assert.Equal(t, 2, len(pool.AllPendingEvidence()))
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// CASE E
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pool.logger.Info("CASE E")
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// test for receiving amnesia evidence
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ae := types.NewAmnesiaEvidence(ev, types.NewEmptyPOLC())
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// we need to run the trial period ourselves so amnesia evidence should not be added, instead
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// we should extract out the potential amnesia evidence and trying to add that before realising
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// that we already have it -> no error
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err = pool.AddEvidence(ae)
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assert.NoError(t, err)
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assert.Equal(t, 2, len(pool.AllPendingEvidence()))
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voteD := makeVote(height, 2, 0, pubKey.Address(), firstBlockID, evidenceTime.Add(4*time.Second))
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vD := voteD.ToProto()
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err = val.SignVote(evidenceChainID, vD)
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require.NoError(t, err)
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voteD.Signature = vD.Signature
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// CASE F
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pool.logger.Info("CASE F")
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// a new amnesia evidence is seen. It has an empty polc so we should extract the potential amnesia evidence
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// and start our own trial
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newPe := &types.PotentialAmnesiaEvidence{
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VoteA: voteB,
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VoteB: voteD,
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}
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newAe := &types.AmnesiaEvidence{
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PotentialAmnesiaEvidence: newPe,
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Polc: types.NewEmptyPOLC(),
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}
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err = pool.AddEvidence(newAe)
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assert.NoError(t, err)
|
|
assert.Equal(t, 2, len(pool.AllPendingEvidence()))
|
|
assert.True(t, pool.IsOnTrial(newPe))
|
|
|
|
// CASE G
|
|
pool.logger.Info("CASE G")
|
|
// Finally, we receive an amnesia evidence containing a valid polc for an earlier potential amnesia evidence
|
|
// that we have already upgraded to. We should ad this new amnesia evidence in replace of the prior
|
|
// amnesia evidence with an empty polc that we have
|
|
aeWithPolc := &types.AmnesiaEvidence{
|
|
PotentialAmnesiaEvidence: ev,
|
|
Polc: validPolc,
|
|
}
|
|
err = pool.AddEvidence(aeWithPolc)
|
|
assert.NoError(t, err)
|
|
assert.True(t, pool.IsPending(aeWithPolc))
|
|
assert.Equal(t, 2, len(pool.AllPendingEvidence()))
|
|
t.Log(pool.AllPendingEvidence())
|
|
|
|
}
|
|
|
|
func initializeStateFromValidatorSet(valSet *types.ValidatorSet, height int64) dbm.DB {
|
|
stateDB := dbm.NewMemDB()
|
|
state := sm.State{
|
|
ChainID: evidenceChainID,
|
|
LastBlockHeight: height,
|
|
LastBlockTime: tmtime.Now(),
|
|
Validators: valSet,
|
|
NextValidators: valSet.CopyIncrementProposerPriority(1),
|
|
LastValidators: valSet,
|
|
LastHeightValidatorsChanged: 1,
|
|
ConsensusParams: tmproto.ConsensusParams{
|
|
Block: tmproto.BlockParams{
|
|
MaxBytes: 22020096,
|
|
MaxGas: -1,
|
|
},
|
|
Evidence: tmproto.EvidenceParams{
|
|
MaxAgeNumBlocks: 20,
|
|
MaxAgeDuration: 48 * time.Hour,
|
|
MaxNum: 50,
|
|
ProofTrialPeriod: 1,
|
|
},
|
|
},
|
|
}
|
|
|
|
// save all states up to height
|
|
for i := int64(0); i <= height; i++ {
|
|
state.LastBlockHeight = i
|
|
sm.SaveState(stateDB, state)
|
|
}
|
|
|
|
return stateDB
|
|
}
|
|
|
|
func initializeValidatorState(privVal types.PrivValidator, height int64) dbm.DB {
|
|
|
|
pubKey, _ := privVal.GetPubKey()
|
|
validator := &types.Validator{Address: pubKey.Address(), VotingPower: 0, PubKey: pubKey}
|
|
|
|
// create validator set and state
|
|
valSet := &types.ValidatorSet{
|
|
Validators: []*types.Validator{validator},
|
|
Proposer: validator,
|
|
}
|
|
|
|
return initializeStateFromValidatorSet(valSet, height)
|
|
}
|
|
|
|
// initializeBlockStore creates a block storage and populates it w/ a dummy
|
|
// block at +height+.
|
|
func initializeBlockStore(db dbm.DB, state sm.State, valAddr []byte) *store.BlockStore {
|
|
blockStore := store.NewBlockStore(db)
|
|
|
|
for i := int64(1); i <= state.LastBlockHeight; i++ {
|
|
lastCommit := makeCommit(i-1, valAddr)
|
|
block, _ := state.MakeBlock(i, []types.Tx{}, lastCommit, nil,
|
|
state.Validators.GetProposer().Address)
|
|
|
|
const parts = 1
|
|
partSet := block.MakePartSet(parts)
|
|
|
|
seenCommit := makeCommit(i, valAddr)
|
|
blockStore.SaveBlock(block, partSet, seenCommit)
|
|
}
|
|
|
|
return blockStore
|
|
}
|
|
|
|
func makeCommit(height int64, valAddr []byte) *types.Commit {
|
|
commitSigs := []types.CommitSig{{
|
|
BlockIDFlag: types.BlockIDFlagCommit,
|
|
ValidatorAddress: valAddr,
|
|
Timestamp: time.Now(),
|
|
Signature: []byte("Signature"),
|
|
}}
|
|
return types.NewCommit(height, 0, types.BlockID{}, commitSigs)
|
|
}
|
|
|
|
func makeVote(height int64, round, index int32, addr bytes.HexBytes,
|
|
blockID types.BlockID, time time.Time) *types.Vote {
|
|
return &types.Vote{
|
|
Type: tmproto.SignedMsgType(2),
|
|
Height: height,
|
|
Round: round,
|
|
BlockID: blockID,
|
|
Timestamp: time,
|
|
ValidatorAddress: addr,
|
|
ValidatorIndex: index,
|
|
}
|
|
}
|