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package consensus
import (
"encoding/binary"
"fmt"
"os"
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
dbm "github.com/tendermint/tm-db"
"github.com/tendermint/tendermint/abci/example/code"
abci "github.com/tendermint/tendermint/abci/types"
mempl "github.com/tendermint/tendermint/mempool"
sm "github.com/tendermint/tendermint/state"
"github.com/tendermint/tendermint/types"
)
// for testing
func assertMempool(txn txNotifier) mempl.Mempool {
return txn.(mempl.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 := newStateWithConfig(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 := newStateWithConfig(config, state, privVals[0], NewCounterApplication())
assertMempool(cs.txNotifier).EnableTxsAvailable()
newBlockCh := subscribe(cs.eventBus, types.EventQueryNewBlock)
startTestRound(cs, cs.Height, cs.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 := newStateWithConfig(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++ // 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++ // 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 *State, 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, mempl.TxInfo{})
if err != nil {
panic(fmt.Sprintf("Error after CheckTx: %v", err))
}
}
}
func TestMempoolTxConcurrentWithCommit(t *testing.T) {
state, privVals := randGenesisState(1, false, 10)
blockDB := dbm.NewMemDB()
stateStore := sm.NewStore(blockDB)
cs := newStateWithConfigAndBlockStore(config, state, privVals[0], NewCounterApplication(), blockDB)
err := stateStore.Save(state)
require.NoError(t, err)
newBlockHeaderCh := subscribe(cs.eventBus, types.EventQueryNewBlockHeader)
const numTxs int64 = 3000
go deliverTxsRange(cs, 0, int(numTxs))
startTestRound(cs, cs.Height, cs.Round)
for n := int64(0); n < numTxs; {
select {
case msg := <-newBlockHeaderCh:
headerEvent := msg.Data().(types.EventDataNewBlockHeader)
n += headerEvent.NumTxs
case <-time.After(30 * time.Second):
t.Fatal("Timed out waiting 30s to commit blocks with transactions")
}
}
}
func TestMempoolRmBadTx(t *testing.T) {
state, privVals := randGenesisState(1, false, 10)
app := NewCounterApplication()
blockDB := dbm.NewMemDB()
stateStore := sm.NewStore(blockDB)
cs := newStateWithConfigAndBlockStore(config, state, privVals[0], app, blockDB)
err := stateStore.Save(state)
require.NoError(t, err)
// increment the counter by 1
txBytes := make([]byte, 8)
binary.BigEndian.PutUint64(txBytes, uint64(0))
resDeliver := app.DeliverTx(abci.RequestDeliverTx{Tx: 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.Errorf("expected checktx to return bad nonce, got %v", r)
return
}
checkTxRespCh <- struct{}{}
}, mempl.TxInfo{})
if err != nil {
t.Errorf("error after CheckTx: %v", err)
return
}
// 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.Errorf("timed out waiting for tx to return")
return
}
// Wait until the tx is removed
ticker = time.After(time.Second * 5)
select {
case <-emptyMempoolCh:
// success
case <-ticker:
t.Errorf("timed out waiting for tx to be removed")
return
}
}
// 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(req abci.RequestDeliverTx) abci.ResponseDeliverTx {
txValue := txAsUint64(req.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(req abci.RequestCheckTx) abci.ResponseCheckTx {
txValue := txAsUint64(req.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}
}