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core: reuse mempool from AddBlock() for bc.isTxStillRelevant()

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It's already there most of the time and creating another slice is just a waste
of time. Checking for presence with map is also a little faster.
This commit is contained in:
Roman Khimov 2020-09-10 15:02:03 +03:00
parent 26339c75dc
commit 7310e748e3
1 changed files with 28 additions and 34 deletions
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62
pkg/core/blockchain.go
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@ -4,7 +4,6 @@ import (
"errors"
"fmt"
"math/big"
"sort"
"sync"
"sync/atomic"
"time"
@ -200,7 +199,7 @@ func (bc *Blockchain) init() error {
if err != nil {
return err
}
return bc.storeBlock(genesisBlock)
return bc.storeBlock(genesisBlock, nil)
}
if ver != version {
return fmt.Errorf("storage version mismatch betweeen %s and %s", version, ver)
@ -413,6 +412,7 @@ func (bc *Blockchain) AddBlock(block *block.Block) error {
bc.addLock.Lock()
defer bc.addLock.Unlock()
var mp *mempool.Pool
expectedHeight := bc.BlockHeight() + 1
if expectedHeight != block.Index {
return fmt.Errorf("expected %d, got %d: %w", expectedHeight, block.Index, ErrInvalidBlockIndex)
@ -430,28 +430,26 @@ func (bc *Blockchain) AddBlock(block *block.Block) error {
if err != nil {
return fmt.Errorf("block %s is invalid: %w", block.Hash().StringLE(), err)
}
if bc.config.VerifyTransactions {
var mp = mempool.New(len(block.Transactions))
for _, tx := range block.Transactions {
var err error
// Transactions are verified before adding them
// into the pool, so there is no point in doing
// it again even if we're verifying in-block transactions.
if bc.memPool.ContainsKey(tx.Hash()) {
err = mp.Add(tx, bc)
if err == nil {
continue
}
} else {
err = bc.verifyAndPoolTx(tx, mp)
}
if err != nil {
return fmt.Errorf("transaction %s failed to verify: %w", tx.Hash().StringLE(), err)
mp = mempool.New(len(block.Transactions))
for _, tx := range block.Transactions {
var err error
// Transactions are verified before adding them
// into the pool, so there is no point in doing
// it again even if we're verifying in-block transactions.
if bc.memPool.ContainsKey(tx.Hash()) {
err = mp.Add(tx, bc)
if err == nil {
continue
}
} else {
err = bc.verifyAndPoolTx(tx, mp)
}
if err != nil && bc.config.VerifyTransactions {
return fmt.Errorf("transaction %s failed to verify: %w", tx.Hash().StringLE(), err)
}
}
}
return bc.storeBlock(block)
return bc.storeBlock(block, mp)
}
// AddHeaders processes the given headers and add them to the
@ -569,7 +567,7 @@ func (bc *Blockchain) GetStateRoot(height uint32) (*state.MPTRootState, error) {
// storeBlock performs chain update using the block given, it executes all
// transactions with all appropriate side-effects and updates Blockchain state.
// This is the only way to change Blockchain state.
func (bc *Blockchain) storeBlock(block *block.Block) error {
func (bc *Blockchain) storeBlock(block *block.Block, txpool *mempool.Pool) error {
cache := dao.NewCached(bc.dao)
writeBuf := io.NewBufBinWriter()
appExecResults := make([]*state.AppExecResult, 0, 1+len(block.Transactions))
@ -612,8 +610,7 @@ func (bc *Blockchain) storeBlock(block *block.Block) error {
writeBuf.Reset()
}
var txHashes = make([]util.Uint256, len(block.Transactions))
for i, tx := range block.Transactions {
for _, tx := range block.Transactions {
if err := cache.StoreAsTransaction(tx, block.Index, writeBuf); err != nil {
return err
}
@ -654,11 +651,7 @@ func (bc *Blockchain) storeBlock(block *block.Block) error {
return fmt.Errorf("failed to store tx exec result: %w", err)
}
writeBuf.Reset()
txHashes[i] = tx.Hash()
}
sort.Slice(txHashes, func(i, j int) bool {
return txHashes[i].CompareTo(txHashes[j]) < 0
})
root := bc.dao.MPT.StateRoot()
var prevHash util.Uint256
@ -700,7 +693,7 @@ func (bc *Blockchain) storeBlock(block *block.Block) error {
}
bc.topBlock.Store(block)
atomic.StoreUint32(&bc.blockHeight, block.Index)
bc.memPool.RemoveStale(func(tx *transaction.Transaction) bool { return bc.isTxStillRelevant(tx, txHashes) }, bc)
bc.memPool.RemoveStale(func(tx *transaction.Transaction) bool { return bc.isTxStillRelevant(tx, txpool) }, bc)
bc.lock.Unlock()
updateBlockHeightMetric(block.Index)
@ -1305,17 +1298,18 @@ func (bc *Blockchain) verifyTxAttributes(tx *transaction.Transaction) error {
// isTxStillRelevant is a callback for mempool transaction filtering after the
// new block addition. It returns false for transactions added by the new block
// (passed via txHashes) and does witness reverification for non-standard
// (passed via txpool) and does witness reverification for non-standard
// contracts. It operates under the assumption that full transaction verification
// was already done so we don't need to check basic things like size, input/output
// correctness, presence in blocks before the new one, etc.
func (bc *Blockchain) isTxStillRelevant(t *transaction.Transaction, txHashes []util.Uint256) bool {
func (bc *Blockchain) isTxStillRelevant(t *transaction.Transaction, txpool *mempool.Pool) bool {
var recheckWitness bool
index := sort.Search(len(txHashes), func(i int) bool {
return txHashes[i].CompareTo(t.Hash()) >= 0
})
if index < len(txHashes) && txHashes[index].Equals(t.Hash()) {
if txpool == nil {
if bc.dao.HasTransaction(t.Hash()) {
return false
}
} else if txpool.ContainsKey(t.Hash()) {
return false
}
if err := bc.verifyTxAttributes(t); err != nil {