package consensus import ( "bytes" "context" "fmt" "io/ioutil" "os" "path/filepath" "sort" "sync" "testing" "time" "github.com/go-kit/kit/log/term" "path" abcicli "github.com/tendermint/tendermint/abci/client" "github.com/tendermint/tendermint/abci/example/counter" "github.com/tendermint/tendermint/abci/example/kvstore" abci "github.com/tendermint/tendermint/abci/types" bc "github.com/tendermint/tendermint/blockchain" cfg "github.com/tendermint/tendermint/config" cstypes "github.com/tendermint/tendermint/consensus/types" cmn "github.com/tendermint/tendermint/libs/common" "github.com/tendermint/tendermint/libs/log" tmpubsub "github.com/tendermint/tendermint/libs/pubsub" mempl "github.com/tendermint/tendermint/mempool" "github.com/tendermint/tendermint/p2p" "github.com/tendermint/tendermint/privval" sm "github.com/tendermint/tendermint/state" "github.com/tendermint/tendermint/types" tmtime "github.com/tendermint/tendermint/types/time" dbm "github.com/tendermint/tm-cmn/db" ) const ( testSubscriber = "test-client" ) // A cleanupFunc cleans up any config / test files created for a particular // test. type cleanupFunc func() // genesis, chain_id, priv_val var config *cfg.Config // NOTE: must be reset for each _test.go file var consensusReplayConfig *cfg.Config var ensureTimeout = time.Millisecond * 100 func ensureDir(dir string, mode os.FileMode) { if err := cmn.EnsureDir(dir, mode); err != nil { panic(err) } } func ResetConfig(name string) *cfg.Config { return cfg.ResetTestRoot(name) } //------------------------------------------------------------------------------- // validator stub (a kvstore consensus peer we control) type validatorStub struct { Index int // Validator index. NOTE: we don't assume validator set changes. Height int64 Round int types.PrivValidator } var testMinPower int64 = 10 func NewValidatorStub(privValidator types.PrivValidator, valIndex int) *validatorStub { return &validatorStub{ Index: valIndex, PrivValidator: privValidator, } } func (vs *validatorStub) signVote(voteType types.SignedMsgType, hash []byte, header types.PartSetHeader) (*types.Vote, error) { addr := vs.PrivValidator.GetPubKey().Address() vote := &types.Vote{ ValidatorIndex: vs.Index, ValidatorAddress: addr, Height: vs.Height, Round: vs.Round, Timestamp: tmtime.Now(), Type: voteType, BlockID: types.BlockID{Hash: hash, PartsHeader: header}, } err := vs.PrivValidator.SignVote(config.ChainID(), vote) return vote, err } // Sign vote for type/hash/header func signVote(vs *validatorStub, voteType types.SignedMsgType, hash []byte, header types.PartSetHeader) *types.Vote { v, err := vs.signVote(voteType, hash, header) if err != nil { panic(fmt.Errorf("failed to sign vote: %v", err)) } return v } func signVotes(voteType types.SignedMsgType, hash []byte, header types.PartSetHeader, vss ...*validatorStub) []*types.Vote { votes := make([]*types.Vote, len(vss)) for i, vs := range vss { votes[i] = signVote(vs, voteType, hash, header) } return votes } func incrementHeight(vss ...*validatorStub) { for _, vs := range vss { vs.Height++ } } func incrementRound(vss ...*validatorStub) { for _, vs := range vss { vs.Round++ } } type ValidatorStubsByAddress []*validatorStub func (vss ValidatorStubsByAddress) Len() int { return len(vss) } func (vss ValidatorStubsByAddress) Less(i, j int) bool { return bytes.Compare(vss[i].GetPubKey().Address(), vss[j].GetPubKey().Address()) == -1 } func (vss ValidatorStubsByAddress) Swap(i, j int) { it := vss[i] vss[i] = vss[j] vss[i].Index = i vss[j] = it vss[j].Index = j } //------------------------------------------------------------------------------- // Functions for transitioning the consensus state func startTestRound(cs *ConsensusState, height int64, round int) { cs.enterNewRound(height, round) cs.startRoutines(0) } // Create proposal block from cs1 but sign it with vs. func decideProposal(cs1 *ConsensusState, vs *validatorStub, height int64, round int) (proposal *types.Proposal, block *types.Block) { cs1.mtx.Lock() block, blockParts := cs1.createProposalBlock() validRound := cs1.ValidRound chainID := cs1.state.ChainID cs1.mtx.Unlock() if block == nil { panic("Failed to createProposalBlock. Did you forget to add commit for previous block?") } // Make proposal polRound, propBlockID := validRound, types.BlockID{Hash: block.Hash(), PartsHeader: blockParts.Header()} proposal = types.NewProposal(height, round, polRound, propBlockID) if err := vs.SignProposal(chainID, proposal); err != nil { panic(err) } return } func addVotes(to *ConsensusState, votes ...*types.Vote) { for _, vote := range votes { to.peerMsgQueue <- msgInfo{Msg: &VoteMessage{vote}} } } func signAddVotes(to *ConsensusState, voteType types.SignedMsgType, hash []byte, header types.PartSetHeader, vss ...*validatorStub) { votes := signVotes(voteType, hash, header, vss...) addVotes(to, votes...) } func validatePrevote(t *testing.T, cs *ConsensusState, round int, privVal *validatorStub, blockHash []byte) { prevotes := cs.Votes.Prevotes(round) address := privVal.GetPubKey().Address() var vote *types.Vote if vote = prevotes.GetByAddress(address); vote == nil { panic("Failed to find prevote from validator") } if blockHash == nil { if vote.BlockID.Hash != nil { panic(fmt.Sprintf("Expected prevote to be for nil, got %X", vote.BlockID.Hash)) } } else { if !bytes.Equal(vote.BlockID.Hash, blockHash) { panic(fmt.Sprintf("Expected prevote to be for %X, got %X", blockHash, vote.BlockID.Hash)) } } } func validateLastPrecommit(t *testing.T, cs *ConsensusState, privVal *validatorStub, blockHash []byte) { votes := cs.LastCommit address := privVal.GetPubKey().Address() var vote *types.Vote if vote = votes.GetByAddress(address); vote == nil { panic("Failed to find precommit from validator") } if !bytes.Equal(vote.BlockID.Hash, blockHash) { panic(fmt.Sprintf("Expected precommit to be for %X, got %X", blockHash, vote.BlockID.Hash)) } } func validatePrecommit(t *testing.T, cs *ConsensusState, thisRound, lockRound int, privVal *validatorStub, votedBlockHash, lockedBlockHash []byte) { precommits := cs.Votes.Precommits(thisRound) address := privVal.GetPubKey().Address() var vote *types.Vote if vote = precommits.GetByAddress(address); vote == nil { panic("Failed to find precommit from validator") } if votedBlockHash == nil { if vote.BlockID.Hash != nil { panic("Expected precommit to be for nil") } } else { if !bytes.Equal(vote.BlockID.Hash, votedBlockHash) { panic("Expected precommit to be for proposal block") } } if lockedBlockHash == nil { if cs.LockedRound != lockRound || cs.LockedBlock != nil { panic(fmt.Sprintf("Expected to be locked on nil at round %d. Got locked at round %d with block %v", lockRound, cs.LockedRound, cs.LockedBlock)) } } else { if cs.LockedRound != lockRound || !bytes.Equal(cs.LockedBlock.Hash(), lockedBlockHash) { panic(fmt.Sprintf("Expected block to be locked on round %d, got %d. Got locked block %X, expected %X", lockRound, cs.LockedRound, cs.LockedBlock.Hash(), lockedBlockHash)) } } } func validatePrevoteAndPrecommit(t *testing.T, cs *ConsensusState, thisRound, lockRound int, privVal *validatorStub, votedBlockHash, lockedBlockHash []byte) { // verify the prevote validatePrevote(t, cs, thisRound, privVal, votedBlockHash) // verify precommit cs.mtx.Lock() validatePrecommit(t, cs, thisRound, lockRound, privVal, votedBlockHash, lockedBlockHash) cs.mtx.Unlock() } func subscribeToVoter(cs *ConsensusState, addr []byte) <-chan tmpubsub.Message { votesSub, err := cs.eventBus.SubscribeUnbuffered(context.Background(), testSubscriber, types.EventQueryVote) if err != nil { panic(fmt.Sprintf("failed to subscribe %s to %v", testSubscriber, types.EventQueryVote)) } ch := make(chan tmpubsub.Message) go func() { for msg := range votesSub.Out() { vote := msg.Data().(types.EventDataVote) // we only fire for our own votes if bytes.Equal(addr, vote.Vote.ValidatorAddress) { ch <- msg } } }() return ch } //------------------------------------------------------------------------------- // consensus states func newConsensusState(state sm.State, pv types.PrivValidator, app abci.Application) *ConsensusState { config := cfg.ResetTestRoot("consensus_state_test") return newConsensusStateWithConfig(config, state, pv, app) } func newConsensusStateWithConfig(thisConfig *cfg.Config, state sm.State, pv types.PrivValidator, app abci.Application) *ConsensusState { blockDB := dbm.NewMemDB() return newConsensusStateWithConfigAndBlockStore(thisConfig, state, pv, app, blockDB) } func newConsensusStateWithConfigAndBlockStore(thisConfig *cfg.Config, state sm.State, pv types.PrivValidator, app abci.Application, blockDB dbm.DB) *ConsensusState { // Get BlockStore blockStore := bc.NewBlockStore(blockDB) // one for mempool, one for consensus mtx := new(sync.Mutex) proxyAppConnMem := abcicli.NewLocalClient(mtx, app) proxyAppConnCon := abcicli.NewLocalClient(mtx, app) // Make Mempool mempool := mempl.NewCListMempool(thisConfig.Mempool, proxyAppConnMem, 0) mempool.SetLogger(log.TestingLogger().With("module", "mempool")) if thisConfig.Consensus.WaitForTxs() { mempool.EnableTxsAvailable() } // mock the evidence pool evpool := sm.MockEvidencePool{} // Make ConsensusState stateDB := blockDB sm.SaveState(stateDB, state) //for save height 1's validators info blockExec := sm.NewBlockExecutor(stateDB, log.TestingLogger(), proxyAppConnCon, mempool, evpool) cs := NewConsensusState(thisConfig.Consensus, state, blockExec, blockStore, mempool, evpool) cs.SetLogger(log.TestingLogger().With("module", "consensus")) cs.SetPrivValidator(pv) eventBus := types.NewEventBus() eventBus.SetLogger(log.TestingLogger().With("module", "events")) eventBus.Start() cs.SetEventBus(eventBus) return cs } func loadPrivValidator(config *cfg.Config) *privval.FilePV { privValidatorKeyFile := config.PrivValidatorKeyFile() ensureDir(filepath.Dir(privValidatorKeyFile), 0700) privValidatorStateFile := config.PrivValidatorStateFile() privValidator := privval.LoadOrGenFilePV(privValidatorKeyFile, privValidatorStateFile) privValidator.Reset() return privValidator } func randConsensusState(nValidators int) (*ConsensusState, []*validatorStub) { // Get State state, privVals := randGenesisState(nValidators, false, 10) vss := make([]*validatorStub, nValidators) cs := newConsensusState(state, privVals[0], counter.NewCounterApplication(true)) for i := 0; i < nValidators; i++ { vss[i] = NewValidatorStub(privVals[i], i) } // since cs1 starts at 1 incrementHeight(vss[1:]...) return cs, vss } //------------------------------------------------------------------------------- func ensureNoNewEvent(ch <-chan tmpubsub.Message, timeout time.Duration, errorMessage string) { select { case <-time.After(timeout): break case <-ch: panic(errorMessage) } } func ensureNoNewEventOnChannel(ch <-chan tmpubsub.Message) { ensureNoNewEvent( ch, ensureTimeout, "We should be stuck waiting, not receiving new event on the channel") } func ensureNoNewRoundStep(stepCh <-chan tmpubsub.Message) { ensureNoNewEvent( stepCh, ensureTimeout, "We should be stuck waiting, not receiving NewRoundStep event") } func ensureNoNewUnlock(unlockCh <-chan tmpubsub.Message) { ensureNoNewEvent( unlockCh, ensureTimeout, "We should be stuck waiting, not receiving Unlock event") } func ensureNoNewTimeout(stepCh <-chan tmpubsub.Message, timeout int64) { timeoutDuration := time.Duration(timeout*10) * time.Nanosecond ensureNoNewEvent( stepCh, timeoutDuration, "We should be stuck waiting, not receiving NewTimeout event") } func ensureNewEvent(ch <-chan tmpubsub.Message, height int64, round int, timeout time.Duration, errorMessage string) { select { case <-time.After(timeout): panic(errorMessage) case msg := <-ch: roundStateEvent, ok := msg.Data().(types.EventDataRoundState) if !ok { panic(fmt.Sprintf("expected a EventDataRoundState, got %T. Wrong subscription channel?", msg.Data())) } if roundStateEvent.Height != height { panic(fmt.Sprintf("expected height %v, got %v", height, roundStateEvent.Height)) } if roundStateEvent.Round != round { panic(fmt.Sprintf("expected round %v, got %v", round, roundStateEvent.Round)) } // TODO: We could check also for a step at this point! } } func ensureNewRound(roundCh <-chan tmpubsub.Message, height int64, round int) { select { case <-time.After(ensureTimeout): panic("Timeout expired while waiting for NewRound event") case msg := <-roundCh: newRoundEvent, ok := msg.Data().(types.EventDataNewRound) if !ok { panic(fmt.Sprintf("expected a EventDataNewRound, got %T. Wrong subscription channel?", msg.Data())) } if newRoundEvent.Height != height { panic(fmt.Sprintf("expected height %v, got %v", height, newRoundEvent.Height)) } if newRoundEvent.Round != round { panic(fmt.Sprintf("expected round %v, got %v", round, newRoundEvent.Round)) } } } func ensureNewTimeout(timeoutCh <-chan tmpubsub.Message, height int64, round int, timeout int64) { timeoutDuration := time.Duration(timeout*10) * time.Nanosecond ensureNewEvent(timeoutCh, height, round, timeoutDuration, "Timeout expired while waiting for NewTimeout event") } func ensureNewProposal(proposalCh <-chan tmpubsub.Message, height int64, round int) { select { case <-time.After(ensureTimeout): panic("Timeout expired while waiting for NewProposal event") case msg := <-proposalCh: proposalEvent, ok := msg.Data().(types.EventDataCompleteProposal) if !ok { panic(fmt.Sprintf("expected a EventDataCompleteProposal, got %T. Wrong subscription channel?", msg.Data())) } if proposalEvent.Height != height { panic(fmt.Sprintf("expected height %v, got %v", height, proposalEvent.Height)) } if proposalEvent.Round != round { panic(fmt.Sprintf("expected round %v, got %v", round, proposalEvent.Round)) } } } func ensureNewValidBlock(validBlockCh <-chan tmpubsub.Message, height int64, round int) { ensureNewEvent(validBlockCh, height, round, ensureTimeout, "Timeout expired while waiting for NewValidBlock event") } func ensureNewBlock(blockCh <-chan tmpubsub.Message, height int64) { select { case <-time.After(ensureTimeout): panic("Timeout expired while waiting for NewBlock event") case msg := <-blockCh: blockEvent, ok := msg.Data().(types.EventDataNewBlock) if !ok { panic(fmt.Sprintf("expected a EventDataNewBlock, got %T. Wrong subscription channel?", msg.Data())) } if blockEvent.Block.Height != height { panic(fmt.Sprintf("expected height %v, got %v", height, blockEvent.Block.Height)) } } } func ensureNewBlockHeader(blockCh <-chan tmpubsub.Message, height int64, blockHash cmn.HexBytes) { select { case <-time.After(ensureTimeout): panic("Timeout expired while waiting for NewBlockHeader event") case msg := <-blockCh: blockHeaderEvent, ok := msg.Data().(types.EventDataNewBlockHeader) if !ok { panic(fmt.Sprintf("expected a EventDataNewBlockHeader, got %T. Wrong subscription channel?", msg.Data())) } if blockHeaderEvent.Header.Height != height { panic(fmt.Sprintf("expected height %v, got %v", height, blockHeaderEvent.Header.Height)) } if !bytes.Equal(blockHeaderEvent.Header.Hash(), blockHash) { panic(fmt.Sprintf("expected header %X, got %X", blockHash, blockHeaderEvent.Header.Hash())) } } } func ensureNewUnlock(unlockCh <-chan tmpubsub.Message, height int64, round int) { ensureNewEvent(unlockCh, height, round, ensureTimeout, "Timeout expired while waiting for NewUnlock event") } func ensureProposal(proposalCh <-chan tmpubsub.Message, height int64, round int, propID types.BlockID) { select { case <-time.After(ensureTimeout): panic("Timeout expired while waiting for NewProposal event") case msg := <-proposalCh: proposalEvent, ok := msg.Data().(types.EventDataCompleteProposal) if !ok { panic(fmt.Sprintf("expected a EventDataCompleteProposal, got %T. Wrong subscription channel?", msg.Data())) } if proposalEvent.Height != height { panic(fmt.Sprintf("expected height %v, got %v", height, proposalEvent.Height)) } if proposalEvent.Round != round { panic(fmt.Sprintf("expected round %v, got %v", round, proposalEvent.Round)) } if !proposalEvent.BlockID.Equals(propID) { panic("Proposed block does not match expected block") } } } func ensurePrecommit(voteCh <-chan tmpubsub.Message, height int64, round int) { ensureVote(voteCh, height, round, types.PrecommitType) } func ensurePrevote(voteCh <-chan tmpubsub.Message, height int64, round int) { ensureVote(voteCh, height, round, types.PrevoteType) } func ensureVote(voteCh <-chan tmpubsub.Message, height int64, round int, voteType types.SignedMsgType) { select { case <-time.After(ensureTimeout): panic("Timeout expired while waiting for NewVote event") case msg := <-voteCh: voteEvent, ok := msg.Data().(types.EventDataVote) if !ok { panic(fmt.Sprintf("expected a EventDataVote, got %T. Wrong subscription channel?", msg.Data())) } vote := voteEvent.Vote if vote.Height != height { panic(fmt.Sprintf("expected height %v, got %v", height, vote.Height)) } if vote.Round != round { panic(fmt.Sprintf("expected round %v, got %v", round, vote.Round)) } if vote.Type != voteType { panic(fmt.Sprintf("expected type %v, got %v", voteType, vote.Type)) } } } func ensureNewEventOnChannel(ch <-chan tmpubsub.Message) { select { case <-time.After(ensureTimeout): panic("Timeout expired while waiting for new activity on the channel") case <-ch: } } //------------------------------------------------------------------------------- // consensus nets // consensusLogger is a TestingLogger which uses a different // color for each validator ("validator" key must exist). func consensusLogger() log.Logger { return log.TestingLoggerWithColorFn(func(keyvals ...interface{}) term.FgBgColor { for i := 0; i < len(keyvals)-1; i += 2 { if keyvals[i] == "validator" { return term.FgBgColor{Fg: term.Color(uint8(keyvals[i+1].(int) + 1))} } } return term.FgBgColor{} }).With("module", "consensus") } func randConsensusNet(nValidators int, testName string, tickerFunc func() TimeoutTicker, appFunc func() abci.Application, configOpts ...func(*cfg.Config)) ([]*ConsensusState, cleanupFunc) { genDoc, privVals := randGenesisDoc(nValidators, false, 30) css := make([]*ConsensusState, nValidators) logger := consensusLogger() configRootDirs := make([]string, 0, nValidators) for i := 0; i < nValidators; i++ { stateDB := dbm.NewMemDB() // each state needs its own db state, _ := sm.LoadStateFromDBOrGenesisDoc(stateDB, genDoc) thisConfig := ResetConfig(fmt.Sprintf("%s_%d", testName, i)) configRootDirs = append(configRootDirs, thisConfig.RootDir) for _, opt := range configOpts { opt(thisConfig) } ensureDir(filepath.Dir(thisConfig.Consensus.WalFile()), 0700) // dir for wal app := appFunc() vals := types.TM2PB.ValidatorUpdates(state.Validators) app.InitChain(abci.RequestInitChain{Validators: vals}) css[i] = newConsensusStateWithConfigAndBlockStore(thisConfig, state, privVals[i], app, stateDB) css[i].SetTimeoutTicker(tickerFunc()) css[i].SetLogger(logger.With("validator", i, "module", "consensus")) } return css, func() { for _, dir := range configRootDirs { os.RemoveAll(dir) } } } // nPeers = nValidators + nNotValidator func randConsensusNetWithPeers(nValidators, nPeers int, testName string, tickerFunc func() TimeoutTicker, appFunc func(string) abci.Application) ([]*ConsensusState, *types.GenesisDoc, *cfg.Config, cleanupFunc) { genDoc, privVals := randGenesisDoc(nValidators, false, testMinPower) css := make([]*ConsensusState, nPeers) logger := consensusLogger() var peer0Config *cfg.Config configRootDirs := make([]string, 0, nPeers) for i := 0; i < nPeers; i++ { stateDB := dbm.NewMemDB() // each state needs its own db state, _ := sm.LoadStateFromDBOrGenesisDoc(stateDB, genDoc) thisConfig := ResetConfig(fmt.Sprintf("%s_%d", testName, i)) configRootDirs = append(configRootDirs, thisConfig.RootDir) ensureDir(filepath.Dir(thisConfig.Consensus.WalFile()), 0700) // dir for wal if i == 0 { peer0Config = thisConfig } var privVal types.PrivValidator if i < nValidators { privVal = privVals[i] } else { tempKeyFile, err := ioutil.TempFile("", "priv_validator_key_") if err != nil { panic(err) } tempStateFile, err := ioutil.TempFile("", "priv_validator_state_") if err != nil { panic(err) } privVal = privval.GenFilePV(tempKeyFile.Name(), tempStateFile.Name()) } app := appFunc(path.Join(config.DBDir(), fmt.Sprintf("%s_%d", testName, i))) vals := types.TM2PB.ValidatorUpdates(state.Validators) if _, ok := app.(*kvstore.PersistentKVStoreApplication); ok { state.Version.Consensus.App = kvstore.ProtocolVersion //simulate handshake, receive app version. If don't do this, replay test will fail } app.InitChain(abci.RequestInitChain{Validators: vals}) //sm.SaveState(stateDB,state) //height 1's validatorsInfo already saved in LoadStateFromDBOrGenesisDoc above css[i] = newConsensusStateWithConfig(thisConfig, state, privVal, app) css[i].SetTimeoutTicker(tickerFunc()) css[i].SetLogger(logger.With("validator", i, "module", "consensus")) } return css, genDoc, peer0Config, func() { for _, dir := range configRootDirs { os.RemoveAll(dir) } } } func getSwitchIndex(switches []*p2p.Switch, peer p2p.Peer) int { for i, s := range switches { if peer.NodeInfo().ID() == s.NodeInfo().ID() { return i } } panic("didnt find peer in switches") } //------------------------------------------------------------------------------- // genesis func randGenesisDoc(numValidators int, randPower bool, minPower int64) (*types.GenesisDoc, []types.PrivValidator) { validators := make([]types.GenesisValidator, numValidators) privValidators := make([]types.PrivValidator, numValidators) for i := 0; i < numValidators; i++ { val, privVal := types.RandValidator(randPower, minPower) validators[i] = types.GenesisValidator{ PubKey: val.PubKey, Power: val.VotingPower, } privValidators[i] = privVal } sort.Sort(types.PrivValidatorsByAddress(privValidators)) return &types.GenesisDoc{ GenesisTime: tmtime.Now(), ChainID: config.ChainID(), Validators: validators, }, privValidators } func randGenesisState(numValidators int, randPower bool, minPower int64) (sm.State, []types.PrivValidator) { genDoc, privValidators := randGenesisDoc(numValidators, randPower, minPower) s0, _ := sm.MakeGenesisState(genDoc) return s0, privValidators } //------------------------------------ // mock ticker func newMockTickerFunc(onlyOnce bool) func() TimeoutTicker { return func() TimeoutTicker { return &mockTicker{ c: make(chan timeoutInfo, 10), onlyOnce: onlyOnce, } } } // mock ticker only fires on RoundStepNewHeight // and only once if onlyOnce=true type mockTicker struct { c chan timeoutInfo mtx sync.Mutex onlyOnce bool fired bool } func (m *mockTicker) Start() error { return nil } func (m *mockTicker) Stop() error { return nil } func (m *mockTicker) ScheduleTimeout(ti timeoutInfo) { m.mtx.Lock() defer m.mtx.Unlock() if m.onlyOnce && m.fired { return } if ti.Step == cstypes.RoundStepNewHeight { m.c <- ti m.fired = true } } func (m *mockTicker) Chan() <-chan timeoutInfo { return m.c } func (*mockTicker) SetLogger(log.Logger) {} //------------------------------------ func newCounter() abci.Application { return counter.NewCounterApplication(true) } func newPersistentKVStore() abci.Application { dir, err := ioutil.TempDir("", "persistent-kvstore") if err != nil { panic(err) } return kvstore.NewPersistentKVStoreApplication(dir) } func newPersistentKVStoreWithPath(dbDir string) abci.Application { return kvstore.NewPersistentKVStoreApplication(dbDir) }