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629 lines
19 KiB
629 lines
19 KiB
package evidence_test
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import (
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"context"
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"testing"
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"time"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/mock"
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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/internal/eventbus"
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"github.com/tendermint/tendermint/internal/evidence"
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"github.com/tendermint/tendermint/internal/evidence/mocks"
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sm "github.com/tendermint/tendermint/internal/state"
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smmocks "github.com/tendermint/tendermint/internal/state/mocks"
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sf "github.com/tendermint/tendermint/internal/state/test/factory"
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"github.com/tendermint/tendermint/internal/store"
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"github.com/tendermint/tendermint/internal/test/factory"
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"github.com/tendermint/tendermint/libs/log"
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"github.com/tendermint/tendermint/types"
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"github.com/tendermint/tendermint/version"
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tmpubsub "github.com/tendermint/tendermint/internal/pubsub"
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tmquery "github.com/tendermint/tendermint/internal/pubsub/query"
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)
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const evidenceChainID = "test_chain"
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var (
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defaultEvidenceTime = time.Date(2019, 1, 1, 0, 0, 0, 0, time.UTC)
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defaultEvidenceMaxBytes int64 = 1000
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)
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func startPool(t *testing.T, pool *evidence.Pool, store sm.Store) {
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t.Helper()
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state, err := store.Load()
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if err != nil {
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t.Fatalf("cannot load state: %v", err)
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}
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if err := pool.Start(state); err != nil {
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t.Fatalf("cannot start state pool: %v", err)
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}
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}
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func TestEvidencePoolBasic(t *testing.T) {
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var (
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height = int64(1)
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stateStore = &smmocks.Store{}
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evidenceDB = dbm.NewMemDB()
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blockStore = &mocks.BlockStore{}
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)
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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valSet, privVals := factory.ValidatorSet(ctx, t, 1, 10)
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blockStore.On("LoadBlockMeta", mock.AnythingOfType("int64")).Return(
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&types.BlockMeta{Header: types.Header{Time: defaultEvidenceTime}},
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)
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stateStore.On("LoadValidators", mock.AnythingOfType("int64")).Return(valSet, nil)
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stateStore.On("Load").Return(createState(height+1, valSet), nil)
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logger := log.NewNopLogger()
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eventBus := eventbus.NewDefault(logger)
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require.NoError(t, eventBus.Start(ctx))
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pool := evidence.NewPool(logger, evidenceDB, stateStore, blockStore, evidence.NopMetrics(), eventBus)
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startPool(t, pool, stateStore)
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// evidence not seen yet:
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evs, size := pool.PendingEvidence(defaultEvidenceMaxBytes)
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require.Equal(t, 0, len(evs))
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require.Zero(t, size)
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ev, err := types.NewMockDuplicateVoteEvidenceWithValidator(ctx, height, defaultEvidenceTime, privVals[0], evidenceChainID)
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require.NoError(t, err)
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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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// evidence seen but not yet committed:
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err = pool.AddEvidence(ctx, ev)
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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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next := pool.EvidenceFront()
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require.Equal(t, ev, next.Value.(types.Evidence))
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const evidenceBytes int64 = 372
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evs, size = pool.PendingEvidence(evidenceBytes)
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require.Equal(t, 1, len(evs))
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require.Equal(t, evidenceBytes, size) // check that the size of the single evidence in bytes is correct
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// shouldn't be able to add evidence twice
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err = pool.AddEvidence(ctx, ev)
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require.NoError(t, err)
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evs, _ = pool.PendingEvidence(defaultEvidenceMaxBytes)
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require.Equal(t, 1, len(evs))
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}
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// Tests inbound evidence for the right time and height
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func TestAddExpiredEvidence(t *testing.T) {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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var (
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val = types.NewMockPV()
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height = int64(30)
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stateStore = initializeValidatorState(ctx, t, val, height)
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evidenceDB = dbm.NewMemDB()
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blockStore = &mocks.BlockStore{}
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expiredEvidenceTime = time.Date(2018, 1, 1, 0, 0, 0, 0, time.UTC)
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expiredHeight = int64(2)
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)
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blockStore.On("LoadBlockMeta", mock.AnythingOfType("int64")).Return(func(h int64) *types.BlockMeta {
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if h == height || h == expiredHeight {
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return &types.BlockMeta{Header: types.Header{Time: defaultEvidenceTime}}
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}
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return &types.BlockMeta{Header: types.Header{Time: expiredEvidenceTime}}
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})
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logger := log.NewNopLogger()
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eventBus := eventbus.NewDefault(logger)
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require.NoError(t, eventBus.Start(ctx))
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pool := evidence.NewPool(logger, evidenceDB, stateStore, blockStore, evidence.NopMetrics(), eventBus)
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startPool(t, pool, stateStore)
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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, defaultEvidenceTime, false, "valid evidence"},
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{expiredHeight, defaultEvidenceTime, false, "valid evidence (despite old height)"},
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{height - 1, expiredEvidenceTime, false, "valid evidence (despite old time)"},
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{expiredHeight - 1, expiredEvidenceTime, 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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{height, defaultEvidenceTime.Add(1 * time.Minute), true, "evidence time and block time is different"},
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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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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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ev, err := types.NewMockDuplicateVoteEvidenceWithValidator(ctx, tc.evHeight, tc.evTime, val, evidenceChainID)
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require.NoError(t, err)
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err = pool.AddEvidence(ctx, ev)
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if tc.expErr {
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require.Error(t, err)
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} else {
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require.NoError(t, err)
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}
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})
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}
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}
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func TestReportConflictingVotes(t *testing.T) {
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var height int64 = 10
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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pool, pv, _ := defaultTestPool(ctx, t, height)
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val := types.NewValidator(pv.PrivKey.PubKey(), 10)
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ev, err := types.NewMockDuplicateVoteEvidenceWithValidator(ctx, height+1, defaultEvidenceTime, pv, evidenceChainID)
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require.NoError(t, err)
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pool.ReportConflictingVotes(ev.VoteA, ev.VoteB)
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// shouldn't be able to submit the same evidence twice
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pool.ReportConflictingVotes(ev.VoteA, ev.VoteB)
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// evidence from consensus should not be added immediately but reside in the consensus buffer
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evList, evSize := pool.PendingEvidence(defaultEvidenceMaxBytes)
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require.Empty(t, evList)
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require.Zero(t, evSize)
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next := pool.EvidenceFront()
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require.Nil(t, next)
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// move to next height and update state and evidence pool
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state := pool.State()
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state.LastBlockHeight++
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state.LastBlockTime = ev.Time()
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state.LastValidators = types.NewValidatorSet([]*types.Validator{val})
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pool.Update(ctx, state, []types.Evidence{})
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// should be able to retrieve evidence from pool
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evList, _ = pool.PendingEvidence(defaultEvidenceMaxBytes)
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require.Equal(t, []types.Evidence{ev}, evList)
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next = pool.EvidenceFront()
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require.NotNil(t, next)
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}
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func TestEvidencePoolUpdate(t *testing.T) {
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height := int64(21)
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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pool, val, _ := defaultTestPool(ctx, t, height)
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state := pool.State()
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// create two lots of old evidence that we expect to be pruned when we update
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prunedEv, err := types.NewMockDuplicateVoteEvidenceWithValidator(ctx,
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1,
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defaultEvidenceTime.Add(1*time.Minute),
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val,
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evidenceChainID,
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)
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require.NoError(t, err)
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notPrunedEv, err := types.NewMockDuplicateVoteEvidenceWithValidator(ctx,
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2,
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defaultEvidenceTime.Add(2*time.Minute),
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val,
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evidenceChainID,
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)
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require.NoError(t, err)
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require.NoError(t, pool.AddEvidence(ctx, prunedEv))
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require.NoError(t, pool.AddEvidence(ctx, notPrunedEv))
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ev, err := types.NewMockDuplicateVoteEvidenceWithValidator(
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ctx,
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height,
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defaultEvidenceTime.Add(21*time.Minute),
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val,
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evidenceChainID,
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)
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require.NoError(t, err)
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lastCommit := makeCommit(height, val.PrivKey.PubKey().Address())
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block := types.MakeBlock(height+1, []types.Tx{}, lastCommit, []types.Evidence{ev})
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// update state (partially)
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state.LastBlockHeight = height + 1
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state.LastBlockTime = defaultEvidenceTime.Add(22 * time.Minute)
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evList, _ := pool.PendingEvidence(2 * defaultEvidenceMaxBytes)
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require.Equal(t, 2, len(evList))
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require.Equal(t, uint32(2), pool.Size())
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require.NoError(t, pool.CheckEvidence(ctx, types.EvidenceList{ev}))
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evList, _ = pool.PendingEvidence(3 * defaultEvidenceMaxBytes)
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require.Equal(t, 3, len(evList))
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require.Equal(t, uint32(3), pool.Size())
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pool.Update(ctx, state, block.Evidence)
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// a) Update marks evidence as committed so pending evidence should be empty
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evList, _ = pool.PendingEvidence(defaultEvidenceMaxBytes)
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require.Equal(t, []types.Evidence{notPrunedEv}, evList)
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// b) If we try to check this evidence again it should fail because it has already been committed
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err = pool.CheckEvidence(ctx, types.EvidenceList{ev})
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if assert.Error(t, err) {
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assert.Equal(t, "evidence was already committed", err.(*types.ErrInvalidEvidence).Reason.Error())
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}
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}
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func TestVerifyPendingEvidencePasses(t *testing.T) {
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var height int64 = 1
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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pool, val, _ := defaultTestPool(ctx, t, height)
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ev, err := types.NewMockDuplicateVoteEvidenceWithValidator(
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ctx,
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height,
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defaultEvidenceTime.Add(1*time.Minute),
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val,
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evidenceChainID,
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)
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require.NoError(t, err)
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require.NoError(t, pool.AddEvidence(ctx, ev))
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require.NoError(t, pool.CheckEvidence(ctx, types.EvidenceList{ev}))
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}
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func TestVerifyDuplicatedEvidenceFails(t *testing.T) {
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var height int64 = 1
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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pool, val, _ := defaultTestPool(ctx, t, height)
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ev, err := types.NewMockDuplicateVoteEvidenceWithValidator(
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ctx,
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height,
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defaultEvidenceTime.Add(1*time.Minute),
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val,
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evidenceChainID,
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)
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require.NoError(t, err)
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err = pool.CheckEvidence(ctx, types.EvidenceList{ev, ev})
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if assert.Error(t, err) {
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assert.Equal(t, "duplicate evidence", err.(*types.ErrInvalidEvidence).Reason.Error())
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}
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}
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// Check that we generate events when evidence is added into the evidence pool
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func TestEventOnEvidenceValidated(t *testing.T) {
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const height = 1
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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pool, val, eventBus := defaultTestPool(ctx, t, height)
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ev, err := types.NewMockDuplicateVoteEvidenceWithValidator(
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ctx,
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height,
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defaultEvidenceTime.Add(1*time.Minute),
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val,
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evidenceChainID,
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)
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require.NoError(t, err)
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const query = `tm.event='EvidenceValidated'`
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evSub, err := eventBus.SubscribeWithArgs(ctx, tmpubsub.SubscribeArgs{
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ClientID: "test",
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Query: tmquery.MustCompile(query),
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})
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require.NoError(t, err)
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done := make(chan struct{})
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go func() {
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defer close(done)
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msg, err := evSub.Next(ctx)
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if ctx.Err() != nil {
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return
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}
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assert.NoError(t, err)
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edt := msg.Data().(types.EventDataEvidenceValidated)
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assert.Equal(t, ev, edt.Evidence)
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}()
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err = pool.AddEvidence(ctx, ev)
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require.NoError(t, err)
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select {
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case <-done:
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case <-time.After(1 * time.Second):
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t.Fatal("did not receive a block header after 1 sec.")
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}
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}
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// check that valid light client evidence is correctly validated and stored in
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// evidence pool
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func TestLightClientAttackEvidenceLifecycle(t *testing.T) {
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var (
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height int64 = 100
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commonHeight int64 = 90
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)
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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ev, trusted, common := makeLunaticEvidence(ctx, t, height, commonHeight,
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10, 5, 5, defaultEvidenceTime, defaultEvidenceTime.Add(1*time.Hour))
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state := sm.State{
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LastBlockTime: defaultEvidenceTime.Add(2 * time.Hour),
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LastBlockHeight: 110,
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ConsensusParams: *types.DefaultConsensusParams(),
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}
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stateStore := &smmocks.Store{}
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stateStore.On("LoadValidators", height).Return(trusted.ValidatorSet, nil)
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stateStore.On("LoadValidators", commonHeight).Return(common.ValidatorSet, nil)
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stateStore.On("Load").Return(state, nil)
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blockStore := &mocks.BlockStore{}
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blockStore.On("LoadBlockMeta", height).Return(&types.BlockMeta{Header: *trusted.Header})
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blockStore.On("LoadBlockMeta", commonHeight).Return(&types.BlockMeta{Header: *common.Header})
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blockStore.On("LoadBlockCommit", height).Return(trusted.Commit)
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blockStore.On("LoadBlockCommit", commonHeight).Return(common.Commit)
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logger := log.NewNopLogger()
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eventBus := eventbus.NewDefault(logger)
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require.NoError(t, eventBus.Start(ctx))
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pool := evidence.NewPool(logger, dbm.NewMemDB(), stateStore, blockStore, evidence.NopMetrics(), eventBus)
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hash := ev.Hash()
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err := pool.AddEvidence(ctx, ev)
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require.NoError(t, err)
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err = pool.AddEvidence(ctx, ev)
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require.NoError(t, err)
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pendingEv, _ := pool.PendingEvidence(state.ConsensusParams.Evidence.MaxBytes)
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require.Equal(t, 1, len(pendingEv))
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require.Equal(t, ev, pendingEv[0])
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require.NoError(t, pool.CheckEvidence(ctx, pendingEv))
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require.Equal(t, ev, pendingEv[0])
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state.LastBlockHeight++
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state.LastBlockTime = state.LastBlockTime.Add(1 * time.Minute)
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pool.Update(ctx, state, pendingEv)
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require.Equal(t, hash, pendingEv[0].Hash())
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remaindingEv, _ := pool.PendingEvidence(state.ConsensusParams.Evidence.MaxBytes)
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require.Empty(t, remaindingEv)
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// evidence is already committed so it shouldn't pass
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require.Error(t, pool.CheckEvidence(ctx, types.EvidenceList{ev}))
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err = pool.AddEvidence(ctx, ev)
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require.NoError(t, err)
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remaindingEv, _ = pool.PendingEvidence(state.ConsensusParams.Evidence.MaxBytes)
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require.Empty(t, remaindingEv)
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}
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// Tests that restarting the evidence pool after a potential failure will recover the
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// pending evidence and continue to gossip it
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func TestRecoverPendingEvidence(t *testing.T) {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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height := int64(10)
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val := types.NewMockPV()
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valAddress := val.PrivKey.PubKey().Address()
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evidenceDB := dbm.NewMemDB()
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stateStore := initializeValidatorState(ctx, t, val, height)
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state, err := stateStore.Load()
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require.NoError(t, err)
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blockStore, err := initializeBlockStore(dbm.NewMemDB(), state, valAddress)
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require.NoError(t, err)
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logger := log.NewNopLogger()
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eventBus := eventbus.NewDefault(logger)
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require.NoError(t, eventBus.Start(ctx))
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// create previous pool and populate it
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pool := evidence.NewPool(logger, evidenceDB, stateStore, blockStore, evidence.NopMetrics(), eventBus)
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startPool(t, pool, stateStore)
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goodEvidence, err := types.NewMockDuplicateVoteEvidenceWithValidator(
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ctx,
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height,
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defaultEvidenceTime.Add(10*time.Minute),
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val,
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evidenceChainID,
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)
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require.NoError(t, err)
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expiredEvidence, err := types.NewMockDuplicateVoteEvidenceWithValidator(
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ctx,
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int64(1),
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defaultEvidenceTime.Add(1*time.Minute),
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val,
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evidenceChainID,
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)
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require.NoError(t, err)
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err = pool.AddEvidence(ctx, goodEvidence)
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require.NoError(t, err)
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err = pool.AddEvidence(ctx, expiredEvidence)
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require.NoError(t, err)
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// now recover from the previous pool at a different time
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newStateStore := &smmocks.Store{}
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newStateStore.On("Load").Return(sm.State{
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LastBlockTime: defaultEvidenceTime.Add(25 * time.Minute),
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LastBlockHeight: height + 15,
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ConsensusParams: types.ConsensusParams{
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Block: types.BlockParams{
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MaxBytes: 22020096,
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MaxGas: -1,
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},
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Evidence: types.EvidenceParams{
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|
MaxAgeNumBlocks: 20,
|
|
MaxAgeDuration: 20 * time.Minute,
|
|
MaxBytes: defaultEvidenceMaxBytes,
|
|
},
|
|
},
|
|
}, nil)
|
|
|
|
newPool := evidence.NewPool(logger, evidenceDB, newStateStore, blockStore, evidence.NopMetrics(), nil)
|
|
startPool(t, newPool, newStateStore)
|
|
evList, _ := newPool.PendingEvidence(defaultEvidenceMaxBytes)
|
|
require.Equal(t, 1, len(evList))
|
|
|
|
next := newPool.EvidenceFront()
|
|
require.Equal(t, goodEvidence, next.Value.(types.Evidence))
|
|
}
|
|
|
|
func initializeStateFromValidatorSet(t *testing.T, valSet *types.ValidatorSet, height int64) sm.Store {
|
|
stateDB := dbm.NewMemDB()
|
|
stateStore := sm.NewStore(stateDB)
|
|
state := sm.State{
|
|
ChainID: evidenceChainID,
|
|
InitialHeight: 1,
|
|
LastBlockHeight: height,
|
|
LastBlockTime: defaultEvidenceTime,
|
|
Validators: valSet,
|
|
NextValidators: valSet.CopyIncrementProposerPriority(1),
|
|
LastValidators: valSet,
|
|
LastHeightValidatorsChanged: 1,
|
|
ConsensusParams: types.ConsensusParams{
|
|
Block: types.BlockParams{
|
|
MaxBytes: 22020096,
|
|
MaxGas: -1,
|
|
},
|
|
Evidence: types.EvidenceParams{
|
|
MaxAgeNumBlocks: 20,
|
|
MaxAgeDuration: 20 * time.Minute,
|
|
MaxBytes: 1000,
|
|
},
|
|
},
|
|
}
|
|
|
|
// save all states up to height
|
|
for i := int64(0); i <= height; i++ {
|
|
state.LastBlockHeight = i
|
|
require.NoError(t, stateStore.Save(state))
|
|
}
|
|
|
|
return stateStore
|
|
}
|
|
|
|
func initializeValidatorState(ctx context.Context, t *testing.T, privVal types.PrivValidator, height int64) sm.Store {
|
|
pubKey, _ := privVal.GetPubKey(ctx)
|
|
validator := &types.Validator{Address: pubKey.Address(), VotingPower: 10, PubKey: pubKey}
|
|
|
|
// create validator set and state
|
|
valSet := &types.ValidatorSet{
|
|
Validators: []*types.Validator{validator},
|
|
Proposer: validator,
|
|
}
|
|
|
|
return initializeStateFromValidatorSet(t, 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, error) {
|
|
blockStore := store.NewBlockStore(db)
|
|
|
|
for i := int64(1); i <= state.LastBlockHeight; i++ {
|
|
lastCommit := makeCommit(i-1, valAddr)
|
|
block := sf.MakeBlock(state, i, lastCommit)
|
|
|
|
block.Header.Time = defaultEvidenceTime.Add(time.Duration(i) * time.Minute)
|
|
block.Header.Version = version.Consensus{Block: version.BlockProtocol, App: 1}
|
|
const parts = 1
|
|
partSet, err := block.MakePartSet(parts)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
seenCommit := makeCommit(i, valAddr)
|
|
blockStore.SaveBlock(block, partSet, seenCommit)
|
|
}
|
|
|
|
return blockStore, nil
|
|
}
|
|
|
|
func makeCommit(height int64, valAddr []byte) *types.Commit {
|
|
commitSigs := []types.CommitSig{{
|
|
BlockIDFlag: types.BlockIDFlagCommit,
|
|
ValidatorAddress: valAddr,
|
|
Timestamp: defaultEvidenceTime,
|
|
Signature: []byte("Signature"),
|
|
}}
|
|
|
|
return types.NewCommit(height, 0, types.BlockID{}, commitSigs)
|
|
}
|
|
|
|
func defaultTestPool(ctx context.Context, t *testing.T, height int64) (*evidence.Pool, types.MockPV, *eventbus.EventBus) {
|
|
t.Helper()
|
|
val := types.NewMockPV()
|
|
valAddress := val.PrivKey.PubKey().Address()
|
|
evidenceDB := dbm.NewMemDB()
|
|
stateStore := initializeValidatorState(ctx, t, val, height)
|
|
state, err := stateStore.Load()
|
|
require.NoError(t, err)
|
|
blockStore, err := initializeBlockStore(dbm.NewMemDB(), state, valAddress)
|
|
require.NoError(t, err)
|
|
|
|
logger := log.NewNopLogger()
|
|
|
|
eventBus := eventbus.NewDefault(logger)
|
|
require.NoError(t, eventBus.Start(ctx))
|
|
|
|
pool := evidence.NewPool(logger, evidenceDB, stateStore, blockStore, evidence.NopMetrics(), eventBus)
|
|
startPool(t, pool, stateStore)
|
|
return pool, val, eventBus
|
|
}
|
|
|
|
func createState(height int64, valSet *types.ValidatorSet) sm.State {
|
|
return sm.State{
|
|
ChainID: evidenceChainID,
|
|
LastBlockHeight: height,
|
|
LastBlockTime: defaultEvidenceTime,
|
|
Validators: valSet,
|
|
ConsensusParams: *types.DefaultConsensusParams(),
|
|
}
|
|
}
|