256 lines
7.6 KiB
Go
256 lines
7.6 KiB
Go
package mempool
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import (
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"math/big"
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"sort"
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"testing"
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"github.com/nspcc-dev/neo-go/pkg/config/netmode"
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"github.com/nspcc-dev/neo-go/pkg/core/transaction"
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"github.com/nspcc-dev/neo-go/pkg/util"
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"github.com/nspcc-dev/neo-go/pkg/vm/opcode"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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type FeerStub struct {
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feePerByte int64
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}
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var balance = big.NewInt(10000000)
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func (fs *FeerStub) FeePerByte() int64 {
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return fs.feePerByte
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}
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func (fs *FeerStub) GetUtilityTokenBalance(uint160 util.Uint160) *big.Int {
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return balance
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}
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func testMemPoolAddRemoveWithFeer(t *testing.T, fs Feer) {
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mp := NewMemPool(10)
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tx := transaction.New(netmode.UnitTestNet, []byte{byte(opcode.PUSH1)}, 0)
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tx.Nonce = 0
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_, ok := mp.TryGetValue(tx.Hash())
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require.Equal(t, false, ok)
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require.NoError(t, mp.Add(tx, fs))
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// Re-adding should fail.
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require.Error(t, mp.Add(tx, fs))
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tx2, ok := mp.TryGetValue(tx.Hash())
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require.Equal(t, true, ok)
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require.Equal(t, tx, tx2)
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mp.Remove(tx.Hash())
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_, ok = mp.TryGetValue(tx.Hash())
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require.Equal(t, false, ok)
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// Make sure nothing left in the mempool after removal.
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assert.Equal(t, 0, len(mp.verifiedMap))
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assert.Equal(t, 0, len(mp.verifiedTxes))
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}
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func TestMemPoolAddRemove(t *testing.T) {
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var fs = &FeerStub{}
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testMemPoolAddRemoveWithFeer(t, fs)
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}
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func TestOverCapacity(t *testing.T) {
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var fs = &FeerStub{}
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const mempoolSize = 10
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mp := NewMemPool(mempoolSize)
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for i := 0; i < mempoolSize; i++ {
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tx := transaction.New(netmode.UnitTestNet, []byte{byte(opcode.PUSH1)}, 0)
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tx.Nonce = uint32(i)
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require.NoError(t, mp.Add(tx, fs))
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}
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txcnt := uint32(mempoolSize)
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require.Equal(t, mempoolSize, mp.Count())
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require.Equal(t, true, sort.IsSorted(sort.Reverse(mp.verifiedTxes)))
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// Fees are also prioritized.
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for i := 0; i < mempoolSize; i++ {
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tx := transaction.New(netmode.UnitTestNet, []byte{byte(opcode.PUSH1)}, 0)
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tx.Attributes = append(tx.Attributes, transaction.Attribute{
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Usage: transaction.Hash1,
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Data: util.Uint256{1, 2, 3, 4}.BytesBE(),
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})
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tx.NetworkFee = 10000
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tx.Nonce = txcnt
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txcnt++
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// size is 84, networkFee is 10000 => feePerByte is 119
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require.NoError(t, mp.Add(tx, fs))
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require.Equal(t, mempoolSize, mp.Count())
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require.Equal(t, true, sort.IsSorted(sort.Reverse(mp.verifiedTxes)))
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}
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// Less prioritized txes are not allowed anymore.
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tx := transaction.New(netmode.UnitTestNet, []byte{byte(opcode.PUSH1)}, 0)
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tx.Attributes = append(tx.Attributes, transaction.Attribute{
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Usage: transaction.Hash1,
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Data: util.Uint256{1, 2, 3, 4}.BytesBE(),
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})
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tx.NetworkFee = 100
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tx.Nonce = txcnt
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txcnt++
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require.Error(t, mp.Add(tx, fs))
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require.Equal(t, mempoolSize, mp.Count())
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require.Equal(t, true, sort.IsSorted(sort.Reverse(mp.verifiedTxes)))
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// Low net fee, but higher per-byte fee is still a better combination.
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tx = transaction.New(netmode.UnitTestNet, []byte{byte(opcode.PUSH1)}, 0)
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tx.Nonce = txcnt
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tx.NetworkFee = 7000
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txcnt++
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// size is 51 (no attributes), networkFee is 7000 (<10000)
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// => feePerByte is 137 (>119)
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require.NoError(t, mp.Add(tx, fs))
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require.Equal(t, mempoolSize, mp.Count())
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require.Equal(t, true, sort.IsSorted(sort.Reverse(mp.verifiedTxes)))
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// High priority always wins over low priority.
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for i := 0; i < mempoolSize; i++ {
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tx := transaction.New(netmode.UnitTestNet, []byte{byte(opcode.PUSH1)}, 0)
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tx.NetworkFee = 8000
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tx.Nonce = txcnt
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txcnt++
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require.NoError(t, mp.Add(tx, fs))
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require.Equal(t, mempoolSize, mp.Count())
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require.Equal(t, true, sort.IsSorted(sort.Reverse(mp.verifiedTxes)))
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}
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// Good luck with low priority now.
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tx = transaction.New(netmode.UnitTestNet, []byte{byte(opcode.PUSH1)}, 0)
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tx.Nonce = txcnt
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tx.NetworkFee = 7000
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require.Error(t, mp.Add(tx, fs))
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require.Equal(t, mempoolSize, mp.Count())
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require.Equal(t, true, sort.IsSorted(sort.Reverse(mp.verifiedTxes)))
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}
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func TestGetVerified(t *testing.T) {
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var fs = &FeerStub{}
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const mempoolSize = 10
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mp := NewMemPool(mempoolSize)
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txes := make([]*transaction.Transaction, 0, mempoolSize)
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for i := 0; i < mempoolSize; i++ {
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tx := transaction.New(netmode.UnitTestNet, []byte{byte(opcode.PUSH1)}, 0)
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tx.Nonce = uint32(i)
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txes = append(txes, tx)
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require.NoError(t, mp.Add(tx, fs))
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}
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require.Equal(t, mempoolSize, mp.Count())
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verTxes := mp.GetVerifiedTransactions()
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require.Equal(t, mempoolSize, len(verTxes))
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require.ElementsMatch(t, txes, verTxes)
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for _, tx := range txes {
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mp.Remove(tx.Hash())
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}
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verTxes = mp.GetVerifiedTransactions()
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require.Equal(t, 0, len(verTxes))
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}
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func TestRemoveStale(t *testing.T) {
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var fs = &FeerStub{}
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const mempoolSize = 10
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mp := NewMemPool(mempoolSize)
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txes1 := make([]*transaction.Transaction, 0, mempoolSize/2)
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txes2 := make([]*transaction.Transaction, 0, mempoolSize/2)
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for i := 0; i < mempoolSize; i++ {
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tx := transaction.New(netmode.UnitTestNet, []byte{byte(opcode.PUSH1)}, 0)
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tx.Nonce = uint32(i)
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if i%2 == 0 {
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txes1 = append(txes1, tx)
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} else {
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txes2 = append(txes2, tx)
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}
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require.NoError(t, mp.Add(tx, fs))
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}
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require.Equal(t, mempoolSize, mp.Count())
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mp.RemoveStale(func(t *transaction.Transaction) bool {
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for _, tx := range txes2 {
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if tx == t {
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return true
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}
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}
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return false
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}, &FeerStub{})
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require.Equal(t, mempoolSize/2, mp.Count())
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verTxes := mp.GetVerifiedTransactions()
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for _, txf := range verTxes {
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require.NotContains(t, txes1, txf)
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require.Contains(t, txes2, txf)
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}
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}
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func TestMemPoolFees(t *testing.T) {
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mp := NewMemPool(10)
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sender0 := util.Uint160{1, 2, 3}
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tx0 := transaction.New(netmode.UnitTestNet, []byte{byte(opcode.PUSH1)}, 0)
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tx0.NetworkFee = balance.Int64() + 1
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tx0.Sender = sender0
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// insufficient funds to add transaction, but balance should be stored
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require.Equal(t, false, mp.Verify(tx0, &FeerStub{}))
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require.Error(t, mp.Add(tx0, &FeerStub{}))
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require.Equal(t, 1, len(mp.fees))
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require.Equal(t, utilityBalanceAndFees{
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balance: balance,
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feeSum: 0,
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}, mp.fees[sender0])
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balancePart := new(big.Int).Div(balance, big.NewInt(4))
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// no problems with adding another transaction with lower fee
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tx1 := transaction.New(netmode.UnitTestNet, []byte{byte(opcode.PUSH1)}, 0)
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tx1.NetworkFee = balancePart.Int64()
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tx1.Sender = sender0
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require.NoError(t, mp.Add(tx1, &FeerStub{}))
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require.Equal(t, 1, len(mp.fees))
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require.Equal(t, utilityBalanceAndFees{
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balance: balance,
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feeSum: tx1.NetworkFee,
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}, mp.fees[sender0])
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// balance shouldn't change after adding one more transaction
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tx2 := transaction.New(netmode.UnitTestNet, []byte{byte(opcode.PUSH1)}, 0)
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tx2.NetworkFee = new(big.Int).Sub(balance, balancePart).Int64()
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tx2.Sender = sender0
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require.NoError(t, mp.Add(tx2, &FeerStub{}))
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require.Equal(t, 2, len(mp.verifiedTxes))
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require.Equal(t, 1, len(mp.fees))
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require.Equal(t, utilityBalanceAndFees{
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balance: balance,
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feeSum: balance.Int64(),
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}, mp.fees[sender0])
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// can't add more transactions as we don't have enough GAS
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tx3 := transaction.New(netmode.UnitTestNet, []byte{byte(opcode.PUSH1)}, 0)
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tx3.NetworkFee = 1
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tx3.Sender = sender0
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require.Equal(t, false, mp.Verify(tx3, &FeerStub{}))
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require.Error(t, mp.Add(tx3, &FeerStub{}))
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require.Equal(t, 1, len(mp.fees))
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require.Equal(t, utilityBalanceAndFees{
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balance: balance,
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feeSum: balance.Int64(),
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}, mp.fees[sender0])
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// check whether sender's fee updates correctly
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mp.RemoveStale(func(t *transaction.Transaction) bool {
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if t == tx2 {
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return true
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}
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return false
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}, &FeerStub{})
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require.Equal(t, 1, len(mp.fees))
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require.Equal(t, utilityBalanceAndFees{
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balance: balance,
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feeSum: tx2.NetworkFee,
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}, mp.fees[sender0])
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// there should be nothing left
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mp.RemoveStale(func(t *transaction.Transaction) bool {
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if t == tx3 {
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return true
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}
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return false
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}, &FeerStub{})
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require.Equal(t, 0, len(mp.fees))
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}
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