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package evidence
import (
"fmt"
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/mock"
"github.com/tendermint/tendermint/crypto"
"github.com/tendermint/tendermint/crypto/tmhash"
"github.com/tendermint/tendermint/evidence/mocks"
tmrand "github.com/tendermint/tendermint/libs/rand"
"github.com/tendermint/tendermint/types"
)
func TestVerifyEvidenceWrongAddress(t *testing.T) {
var height int64 = 4
val := types.NewMockPV()
stateStore := initializeValidatorState(val, height)
state := stateStore.LoadState()
blockStore := &mocks.BlockStore{}
blockStore.On("LoadBlockMeta", mock.AnythingOfType("int64")).Return(
&types.BlockMeta{Header: types.Header{Time: defaultEvidenceTime}},
)
evidence := types.NewMockDuplicateVoteEvidence(1, defaultEvidenceTime, evidenceChainID)
err := VerifyEvidence(evidence, state, stateStore, blockStore)
errMsg := fmt.Sprintf("address %X was not a validator at height 1", evidence.Address())
if assert.Error(t, err) {
assert.Equal(t, err.Error(), errMsg)
}
}
func TestVerifyEvidenceExpiredEvidence(t *testing.T) {
var height int64 = 4
val := types.NewMockPV()
stateStore := initializeValidatorState(val, height)
state := stateStore.LoadState()
state.ConsensusParams.Evidence.MaxAgeNumBlocks = 1
expiredEvidenceTime := time.Date(2018, 1, 1, 0, 0, 0, 0, time.UTC)
blockStore := &mocks.BlockStore{}
blockStore.On("LoadBlockMeta", mock.AnythingOfType("int64")).Return(
&types.BlockMeta{Header: types.Header{Time: expiredEvidenceTime}},
)
expiredEv := types.NewMockDuplicateVoteEvidenceWithValidator(1, expiredEvidenceTime, val, evidenceChainID)
err := VerifyEvidence(expiredEv, state, stateStore, blockStore)
errMsg := "evidence from height 1 (created at: 2018-01-01 00:00:00 +0000 UTC) is too old"
if assert.Error(t, err) {
assert.Equal(t, err.Error()[:len(errMsg)], errMsg)
}
}
func TestVerifyEvidenceInvalidTime(t *testing.T) {
height := int64(4)
val := types.NewMockPV()
stateStore := initializeValidatorState(val, height)
state := stateStore.LoadState()
blockStore := &mocks.BlockStore{}
blockStore.On("LoadBlockMeta", mock.AnythingOfType("int64")).Return(
&types.BlockMeta{Header: types.Header{Time: defaultEvidenceTime}},
)
differentTime := time.Date(2019, 2, 1, 0, 0, 0, 0, time.UTC)
ev := types.NewMockDuplicateVoteEvidenceWithValidator(height, differentTime, val, evidenceChainID)
err := VerifyEvidence(ev, state, stateStore, blockStore)
errMsg := "evidence time (2019-02-01 00:00:00 +0000 UTC) is different to the time" +
" of the header we have for the same height (2019-01-01 00:00:00 +0000 UTC)"
if assert.Error(t, err) {
assert.Equal(t, errMsg, err.Error())
}
}
func TestVerifyEvidenceWithLunaticValidatorEvidence(t *testing.T) {
var height int64 = 4
val := types.NewMockPV()
stateStore := initializeValidatorState(val, height)
blockID := types.BlockID{
Hash: tmrand.Bytes(tmhash.Size),
PartSetHeader: types.PartSetHeader{
Total: 1,
Hash: tmrand.Bytes(tmhash.Size),
},
}
h := &types.Header{
ChainID: evidenceChainID,
Height: 3,
Time: defaultEvidenceTime,
LastBlockID: blockID,
LastCommitHash: tmhash.Sum([]byte("last_commit_hash")),
DataHash: tmhash.Sum([]byte("data_hash")),
ValidatorsHash: tmhash.Sum([]byte("validators_hash")),
NextValidatorsHash: tmhash.Sum([]byte("next_validators_hash")),
ConsensusHash: tmhash.Sum([]byte("consensus_hash")),
AppHash: tmhash.Sum([]byte("app_hash")),
LastResultsHash: tmhash.Sum([]byte("last_results_hash")),
EvidenceHash: tmhash.Sum([]byte("evidence_hash")),
ProposerAddress: crypto.AddressHash([]byte("proposer_address")),
}
blockStore := &mocks.BlockStore{}
blockStore.On("LoadBlockMeta", mock.AnythingOfType("int64")).Return(
&types.BlockMeta{Header: *h},
)
validH1 := *h
validH1.ValidatorsHash = tmhash.Sum([]byte("different_validators_hash"))
validH2 := validH1
validH2.Time = time.Date(2020, 1, 1, 0, 0, 0, 0, time.UTC)
badH1 := validH1
badH1.ChainID = "different_chain_id"
badH2 := *h
badH2.DataHash = tmhash.Sum([]byte("different_data_hash"))
testCases := []struct {
Header *types.Header
ExpErr bool
ErrMsg string
}{
{
h,
true,
"ValidatorsHash matches committed hash",
},
{
&validH1,
false,
"",
},
{
&validH2,
false,
"",
},
{
&badH1,
true,
"chainID do not match: test_chain vs different_chain_id",
},
{
&badH2,
true,
"ValidatorsHash matches committed hash", // it doesn't recognise that the data hashes are different
},
}
for idx, tc := range testCases {
ev := types.NewLunaticValidatorEvidence(tc.Header,
makeValidVoteForHeader(tc.Header, val), "ValidatorsHash", defaultEvidenceTime)
err := VerifyEvidence(ev, stateStore.LoadState(), stateStore, blockStore)
if tc.ExpErr {
if assert.Error(t, err, fmt.Sprintf("expected an error for case: %d", idx)) {
assert.Equal(t, tc.ErrMsg, err.Error(), fmt.Sprintf("case: %d", idx))
}
} else {
assert.NoError(t, err, fmt.Sprintf("did not expect an error for case: %d", idx))
}
}
}
func makeValidVoteForHeader(header *types.Header, val types.MockPV) *types.Vote {
vote := makeVote(header.Height, 1, 0, val.PrivKey.PubKey().Address(), types.BlockID{
Hash: header.Hash(),
PartSetHeader: types.PartSetHeader{
Total: 100,
Hash: crypto.CRandBytes(tmhash.Size),
},
}, defaultEvidenceTime)
v := vote.ToProto()
err := val.SignVote(evidenceChainID, v)
if err != nil {
panic("verify_test: failed to sign vote for header")
}
vote.Signature = v.Signature
return vote
}