package consensus import ( "encoding/binary" "fmt" "os" "testing" "time" "github.com/stretchr/testify/assert" "github.com/tendermint/tendermint/abci/example/code" abci "github.com/tendermint/tendermint/abci/types" sm "github.com/tendermint/tendermint/state" "github.com/tendermint/tendermint/types" ) // for testing func assertMempool(txn txNotifier) sm.Mempool { return txn.(sm.Mempool) } func TestMempoolNoProgressUntilTxsAvailable(t *testing.T) { config := ResetConfig("consensus_mempool_txs_available_test") defer os.RemoveAll(config.RootDir) config.Consensus.CreateEmptyBlocks = false state, privVals := randGenesisState(1, false, 10) cs := newConsensusStateWithConfig(config, state, privVals[0], NewCounterApplication()) assertMempool(cs.txNotifier).EnableTxsAvailable() height, round := cs.Height, cs.Round newBlockCh := subscribe(cs.eventBus, types.EventQueryNewBlock) startTestRound(cs, height, round) ensureNewEventOnChannel(newBlockCh) // first block gets committed ensureNoNewEventOnChannel(newBlockCh) deliverTxsRange(cs, 0, 1) ensureNewEventOnChannel(newBlockCh) // commit txs ensureNewEventOnChannel(newBlockCh) // commit updated app hash ensureNoNewEventOnChannel(newBlockCh) } func TestMempoolProgressAfterCreateEmptyBlocksInterval(t *testing.T) { config := ResetConfig("consensus_mempool_txs_available_test") defer os.RemoveAll(config.RootDir) config.Consensus.CreateEmptyBlocksInterval = ensureTimeout state, privVals := randGenesisState(1, false, 10) cs := newConsensusStateWithConfig(config, state, privVals[0], NewCounterApplication()) assertMempool(cs.txNotifier).EnableTxsAvailable() height, round := cs.Height, cs.Round newBlockCh := subscribe(cs.eventBus, types.EventQueryNewBlock) startTestRound(cs, height, round) ensureNewEventOnChannel(newBlockCh) // first block gets committed ensureNoNewEventOnChannel(newBlockCh) // then we dont make a block ... ensureNewEventOnChannel(newBlockCh) // until the CreateEmptyBlocksInterval has passed } func TestMempoolProgressInHigherRound(t *testing.T) { config := ResetConfig("consensus_mempool_txs_available_test") defer os.RemoveAll(config.RootDir) config.Consensus.CreateEmptyBlocks = false state, privVals := randGenesisState(1, false, 10) cs := newConsensusStateWithConfig(config, state, privVals[0], NewCounterApplication()) assertMempool(cs.txNotifier).EnableTxsAvailable() height, round := cs.Height, cs.Round newBlockCh := subscribe(cs.eventBus, types.EventQueryNewBlock) newRoundCh := subscribe(cs.eventBus, types.EventQueryNewRound) timeoutCh := subscribe(cs.eventBus, types.EventQueryTimeoutPropose) cs.setProposal = func(proposal *types.Proposal) error { if cs.Height == 2 && cs.Round == 0 { // dont set the proposal in round 0 so we timeout and // go to next round cs.Logger.Info("Ignoring set proposal at height 2, round 0") return nil } return cs.defaultSetProposal(proposal) } startTestRound(cs, height, round) ensureNewRound(newRoundCh, height, round) // first round at first height ensureNewEventOnChannel(newBlockCh) // first block gets committed height = height + 1 // moving to the next height round = 0 ensureNewRound(newRoundCh, height, round) // first round at next height deliverTxsRange(cs, 0, 1) // we deliver txs, but dont set a proposal so we get the next round ensureNewTimeout(timeoutCh, height, round, cs.config.TimeoutPropose.Nanoseconds()) round = round + 1 // moving to the next round ensureNewRound(newRoundCh, height, round) // wait for the next round ensureNewEventOnChannel(newBlockCh) // now we can commit the block } func deliverTxsRange(cs *ConsensusState, start, end int) { // Deliver some txs. for i := start; i < end; i++ { txBytes := make([]byte, 8) binary.BigEndian.PutUint64(txBytes, uint64(i)) err := assertMempool(cs.txNotifier).CheckTx(txBytes, nil) if err != nil { panic(fmt.Sprintf("Error after CheckTx: %v", err)) } } } func TestMempoolTxConcurrentWithCommit(t *testing.T) { state, privVals := randGenesisState(1, false, 10) cs := newConsensusState(state, privVals[0], NewCounterApplication()) height, round := cs.Height, cs.Round newBlockCh := subscribe(cs.eventBus, types.EventQueryNewBlock) NTxs := 3000 go deliverTxsRange(cs, 0, NTxs) startTestRound(cs, height, round) for nTxs := 0; nTxs < NTxs; { ticker := time.NewTicker(time.Second * 30) select { case b := <-newBlockCh: evt := b.(types.EventDataNewBlock) nTxs += int(evt.Block.Header.NumTxs) case <-ticker.C: panic("Timed out waiting to commit blocks with transactions") } } } func TestMempoolRmBadTx(t *testing.T) { state, privVals := randGenesisState(1, false, 10) app := NewCounterApplication() cs := newConsensusState(state, privVals[0], app) // increment the counter by 1 txBytes := make([]byte, 8) binary.BigEndian.PutUint64(txBytes, uint64(0)) resDeliver := app.DeliverTx(txBytes) assert.False(t, resDeliver.IsErr(), fmt.Sprintf("expected no error. got %v", resDeliver)) resCommit := app.Commit() assert.True(t, len(resCommit.Data) > 0) emptyMempoolCh := make(chan struct{}) checkTxRespCh := make(chan struct{}) go func() { // Try to send the tx through the mempool. // CheckTx should not err, but the app should return a bad abci code // and the tx should get removed from the pool err := assertMempool(cs.txNotifier).CheckTx(txBytes, func(r *abci.Response) { if r.GetCheckTx().Code != code.CodeTypeBadNonce { t.Fatalf("expected checktx to return bad nonce, got %v", r) } checkTxRespCh <- struct{}{} }) if err != nil { t.Fatalf("Error after CheckTx: %v", err) } // check for the tx for { txs := assertMempool(cs.txNotifier).ReapMaxBytesMaxGas(int64(len(txBytes)), -1) if len(txs) == 0 { emptyMempoolCh <- struct{}{} return } time.Sleep(10 * time.Millisecond) } }() // Wait until the tx returns ticker := time.After(time.Second * 5) select { case <-checkTxRespCh: // success case <-ticker: t.Fatalf("Timed out waiting for tx to return") } // Wait until the tx is removed ticker = time.After(time.Second * 5) select { case <-emptyMempoolCh: // success case <-ticker: t.Fatalf("Timed out waiting for tx to be removed") } } // CounterApplication that maintains a mempool state and resets it upon commit type CounterApplication struct { abci.BaseApplication txCount int mempoolTxCount int } func NewCounterApplication() *CounterApplication { return &CounterApplication{} } func (app *CounterApplication) Info(req abci.RequestInfo) abci.ResponseInfo { return abci.ResponseInfo{Data: fmt.Sprintf("txs:%v", app.txCount)} } func (app *CounterApplication) DeliverTx(tx []byte) abci.ResponseDeliverTx { txValue := txAsUint64(tx) if txValue != uint64(app.txCount) { return abci.ResponseDeliverTx{ Code: code.CodeTypeBadNonce, Log: fmt.Sprintf("Invalid nonce. Expected %v, got %v", app.txCount, txValue)} } app.txCount++ return abci.ResponseDeliverTx{Code: code.CodeTypeOK} } func (app *CounterApplication) CheckTx(tx []byte) abci.ResponseCheckTx { txValue := txAsUint64(tx) if txValue != uint64(app.mempoolTxCount) { return abci.ResponseCheckTx{ Code: code.CodeTypeBadNonce, Log: fmt.Sprintf("Invalid nonce. Expected %v, got %v", app.mempoolTxCount, txValue)} } app.mempoolTxCount++ return abci.ResponseCheckTx{Code: code.CodeTypeOK} } func txAsUint64(tx []byte) uint64 { tx8 := make([]byte, 8) copy(tx8[len(tx8)-len(tx):], tx) return binary.BigEndian.Uint64(tx8) } func (app *CounterApplication) Commit() abci.ResponseCommit { app.mempoolTxCount = app.txCount if app.txCount == 0 { return abci.ResponseCommit{} } hash := make([]byte, 8) binary.BigEndian.PutUint64(hash, uint64(app.txCount)) return abci.ResponseCommit{Data: hash} }