neoneo-go/pkg/core/mempool/mem_pool_test.go

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2020-01-15 07:52:59 +00:00
package mempool
import (
"math/big"
"sort"
"testing"
"github.com/nspcc-dev/neo-go/pkg/config/netmode"
"github.com/nspcc-dev/neo-go/pkg/core/transaction"
"github.com/nspcc-dev/neo-go/pkg/util"
"github.com/nspcc-dev/neo-go/pkg/vm/opcode"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
type FeerStub struct {
feePerByte int64
}
var balance = big.NewInt(10000000)
func (fs *FeerStub) FeePerByte() int64 {
return fs.feePerByte
}
func (fs *FeerStub) GetUtilityTokenBalance(uint160 util.Uint160) *big.Int {
return balance
}
func testMemPoolAddRemoveWithFeer(t *testing.T, fs Feer) {
mp := NewMemPool(10)
tx := transaction.New(netmode.UnitTestNet, []byte{byte(opcode.PUSH1)}, 0)
tx.Nonce = 0
_, ok := mp.TryGetValue(tx.Hash())
require.Equal(t, false, ok)
require.NoError(t, mp.Add(tx, fs))
// Re-adding should fail.
require.Error(t, mp.Add(tx, fs))
tx2, ok := mp.TryGetValue(tx.Hash())
require.Equal(t, true, ok)
require.Equal(t, tx, tx2)
mp.Remove(tx.Hash())
_, ok = mp.TryGetValue(tx.Hash())
require.Equal(t, false, ok)
// Make sure nothing left in the mempool after removal.
assert.Equal(t, 0, len(mp.verifiedMap))
assert.Equal(t, 0, len(mp.verifiedTxes))
}
func TestMemPoolAddRemove(t *testing.T) {
var fs = &FeerStub{}
testMemPoolAddRemoveWithFeer(t, fs)
}
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func TestOverCapacity(t *testing.T) {
var fs = &FeerStub{}
const mempoolSize = 10
mp := NewMemPool(mempoolSize)
for i := 0; i < mempoolSize; i++ {
tx := transaction.New(netmode.UnitTestNet, []byte{byte(opcode.PUSH1)}, 0)
tx.Nonce = uint32(i)
require.NoError(t, mp.Add(tx, fs))
}
txcnt := uint32(mempoolSize)
require.Equal(t, mempoolSize, mp.Count())
require.Equal(t, true, sort.IsSorted(sort.Reverse(mp.verifiedTxes)))
// Fees are also prioritized.
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for i := 0; i < mempoolSize; i++ {
tx := transaction.New(netmode.UnitTestNet, []byte{byte(opcode.PUSH1)}, 0)
tx.Attributes = append(tx.Attributes, transaction.Attribute{
Usage: transaction.DescriptionURL,
Data: util.Uint256{1, 2, 3, 4}.BytesBE(),
})
tx.NetworkFee = 10000
tx.Nonce = txcnt
txcnt++
// size is 84, networkFee is 10000 => feePerByte is 119
require.NoError(t, mp.Add(tx, fs))
require.Equal(t, mempoolSize, mp.Count())
require.Equal(t, true, sort.IsSorted(sort.Reverse(mp.verifiedTxes)))
}
// Less prioritized txes are not allowed anymore.
tx := transaction.New(netmode.UnitTestNet, []byte{byte(opcode.PUSH1)}, 0)
tx.Attributes = append(tx.Attributes, transaction.Attribute{
Usage: transaction.DescriptionURL,
Data: util.Uint256{1, 2, 3, 4}.BytesBE(),
})
tx.NetworkFee = 100
tx.Nonce = txcnt
txcnt++
require.Error(t, mp.Add(tx, fs))
require.Equal(t, mempoolSize, mp.Count())
require.Equal(t, true, sort.IsSorted(sort.Reverse(mp.verifiedTxes)))
// Low net fee, but higher per-byte fee is still a better combination.
tx = transaction.New(netmode.UnitTestNet, []byte{byte(opcode.PUSH1)}, 0)
tx.Nonce = txcnt
tx.NetworkFee = 7000
txcnt++
// size is 51 (no attributes), networkFee is 7000 (<10000)
// => feePerByte is 137 (>119)
require.NoError(t, mp.Add(tx, fs))
require.Equal(t, mempoolSize, mp.Count())
require.Equal(t, true, sort.IsSorted(sort.Reverse(mp.verifiedTxes)))
// High priority always wins over low priority.
for i := 0; i < mempoolSize; i++ {
tx := transaction.New(netmode.UnitTestNet, []byte{byte(opcode.PUSH1)}, 0)
tx.NetworkFee = 8000
tx.Nonce = txcnt
txcnt++
require.NoError(t, mp.Add(tx, fs))
require.Equal(t, mempoolSize, mp.Count())
require.Equal(t, true, sort.IsSorted(sort.Reverse(mp.verifiedTxes)))
}
// Good luck with low priority now.
tx = transaction.New(netmode.UnitTestNet, []byte{byte(opcode.PUSH1)}, 0)
tx.Nonce = txcnt
tx.NetworkFee = 7000
require.Error(t, mp.Add(tx, fs))
require.Equal(t, mempoolSize, mp.Count())
require.Equal(t, true, sort.IsSorted(sort.Reverse(mp.verifiedTxes)))
}
func TestGetVerified(t *testing.T) {
var fs = &FeerStub{}
const mempoolSize = 10
mp := NewMemPool(mempoolSize)
txes := make([]*transaction.Transaction, 0, mempoolSize)
for i := 0; i < mempoolSize; i++ {
tx := transaction.New(netmode.UnitTestNet, []byte{byte(opcode.PUSH1)}, 0)
tx.Nonce = uint32(i)
txes = append(txes, tx)
require.NoError(t, mp.Add(tx, fs))
}
require.Equal(t, mempoolSize, mp.Count())
verTxes := mp.GetVerifiedTransactions()
require.Equal(t, mempoolSize, len(verTxes))
require.ElementsMatch(t, txes, verTxes)
for _, tx := range txes {
mp.Remove(tx.Hash())
}
verTxes = mp.GetVerifiedTransactions()
require.Equal(t, 0, len(verTxes))
}
func TestRemoveStale(t *testing.T) {
var fs = &FeerStub{}
const mempoolSize = 10
mp := NewMemPool(mempoolSize)
txes1 := make([]*transaction.Transaction, 0, mempoolSize/2)
txes2 := make([]*transaction.Transaction, 0, mempoolSize/2)
for i := 0; i < mempoolSize; i++ {
tx := transaction.New(netmode.UnitTestNet, []byte{byte(opcode.PUSH1)}, 0)
tx.Nonce = uint32(i)
if i%2 == 0 {
txes1 = append(txes1, tx)
} else {
txes2 = append(txes2, tx)
}
require.NoError(t, mp.Add(tx, fs))
}
require.Equal(t, mempoolSize, mp.Count())
mp.RemoveStale(func(t *transaction.Transaction) bool {
for _, tx := range txes2 {
if tx == t {
return true
}
}
return false
}, &FeerStub{})
require.Equal(t, mempoolSize/2, mp.Count())
verTxes := mp.GetVerifiedTransactions()
for _, txf := range verTxes {
require.NotContains(t, txes1, txf)
require.Contains(t, txes2, txf)
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}
}
func TestMemPoolFees(t *testing.T) {
mp := NewMemPool(10)
sender0 := util.Uint160{1, 2, 3}
tx0 := transaction.New(netmode.UnitTestNet, []byte{byte(opcode.PUSH1)}, 0)
tx0.NetworkFee = balance.Int64() + 1
tx0.Sender = sender0
// insufficient funds to add transaction, and balance shouldn't be stored
require.Equal(t, false, mp.Verify(tx0, &FeerStub{}))
require.Error(t, mp.Add(tx0, &FeerStub{}))
require.Equal(t, 0, len(mp.fees))
balancePart := new(big.Int).Div(balance, big.NewInt(4))
// no problems with adding another transaction with lower fee
tx1 := transaction.New(netmode.UnitTestNet, []byte{byte(opcode.PUSH1)}, 0)
tx1.NetworkFee = balancePart.Int64()
tx1.Sender = sender0
require.NoError(t, mp.Add(tx1, &FeerStub{}))
require.Equal(t, 1, len(mp.fees))
require.Equal(t, utilityBalanceAndFees{
balance: balance,
feeSum: tx1.NetworkFee,
}, mp.fees[sender0])
// balance shouldn't change after adding one more transaction
tx2 := transaction.New(netmode.UnitTestNet, []byte{byte(opcode.PUSH1)}, 0)
tx2.NetworkFee = new(big.Int).Sub(balance, balancePart).Int64()
tx2.Sender = sender0
require.NoError(t, mp.Add(tx2, &FeerStub{}))
require.Equal(t, 2, len(mp.verifiedTxes))
require.Equal(t, 1, len(mp.fees))
require.Equal(t, utilityBalanceAndFees{
balance: balance,
feeSum: balance.Int64(),
}, mp.fees[sender0])
// can't add more transactions as we don't have enough GAS
tx3 := transaction.New(netmode.UnitTestNet, []byte{byte(opcode.PUSH1)}, 0)
tx3.NetworkFee = 1
tx3.Sender = sender0
require.Equal(t, false, mp.Verify(tx3, &FeerStub{}))
require.Error(t, mp.Add(tx3, &FeerStub{}))
require.Equal(t, 1, len(mp.fees))
require.Equal(t, utilityBalanceAndFees{
balance: balance,
feeSum: balance.Int64(),
}, mp.fees[sender0])
// check whether sender's fee updates correctly
mp.RemoveStale(func(t *transaction.Transaction) bool {
if t == tx2 {
return true
}
return false
}, &FeerStub{})
require.Equal(t, 1, len(mp.fees))
require.Equal(t, utilityBalanceAndFees{
balance: balance,
feeSum: tx2.NetworkFee,
}, mp.fees[sender0])
// there should be nothing left
mp.RemoveStale(func(t *transaction.Transaction) bool {
if t == tx3 {
return true
}
return false
}, &FeerStub{})
require.Equal(t, 0, len(mp.fees))
}