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Merge pull request #557 from nspcc-dev/fix-mempool-verify

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core: fix and speed up mempool Verify()
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Vsevolod 2019-12-14 13:51:42 +03:00 committed by GitHub
commit 5f40b6a93c
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2 changed files with 35 additions and 15 deletions
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22
pkg/core/mem_pool.go
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@ -287,23 +287,17 @@ func (mp *MemPool) GetVerifiedTransactions() []*transaction.Transaction {
// If yes, the transaction tx is not a valid transaction and the function return false.
// If no, the transaction tx is a valid transaction and the function return true.
func (mp MemPool) Verify(tx *transaction.Transaction) bool {
count := 0
inputs := make([]*transaction.Input, 0)
for _, item := range mp.GetVerifiedTransactions() {
if tx.Hash().Equals(item.Hash()) {
for i := range item.Inputs {
inputs = append(inputs, &item.Inputs[i])
}
}
}
for i := 0; i < len(inputs); i++ {
mp.lock.RLock()
defer mp.lock.RUnlock()
for _, item := range mp.unsortedTxn {
for i := range item.txn.Inputs {
for j := 0; j < len(tx.Inputs); j++ {
if inputs[i].PrevHash.Equals(tx.Inputs[j].PrevHash) {
count++
if item.txn.Inputs[i] == tx.Inputs[j] {
return false
}
}
}
}
return count == 0
return true
}

26
pkg/core/mem_pool_test.go
View file

@ -4,6 +4,7 @@ import (
"testing"
"github.com/CityOfZion/neo-go/pkg/core/transaction"
"github.com/CityOfZion/neo-go/pkg/internal/random"
"github.com/CityOfZion/neo-go/pkg/util"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
@ -62,3 +63,28 @@ func TestMemPoolAddRemove(t *testing.T) {
fs.lowPriority = true
t.Run("high priority", func(t *testing.T) { testMemPoolAddRemoveWithFeer(t, fs) })
}
func TestMemPoolVerify(t *testing.T) {
mp := NewMemPool(10)
tx := newMinerTX()
inhash1 := random.Uint256()
tx.Inputs = append(tx.Inputs, transaction.Input{PrevHash: inhash1, PrevIndex: 0})
require.Equal(t, true, mp.Verify(tx))
item := NewPoolItem(tx, &FeerStub{})
require.Equal(t, true, mp.TryAdd(tx.Hash(), item))
tx2 := newMinerTX()
inhash2 := random.Uint256()
tx2.Inputs = append(tx2.Inputs, transaction.Input{PrevHash: inhash2, PrevIndex: 0})
require.Equal(t, true, mp.Verify(tx2))
item = NewPoolItem(tx2, &FeerStub{})
require.Equal(t, true, mp.TryAdd(tx2.Hash(), item))
tx3 := newMinerTX()
// Different index number, but the same PrevHash as in tx1.
tx3.Inputs = append(tx3.Inputs, transaction.Input{PrevHash: inhash1, PrevIndex: 1})
require.Equal(t, true, mp.Verify(tx3))
// The same input as in tx2.
tx3.Inputs = append(tx3.Inputs, transaction.Input{PrevHash: inhash2, PrevIndex: 0})
require.Equal(t, false, mp.Verify(tx3))
}