Implement dropping nanopay txn in txpool

Signed-off-by: Yilun <zyl.skysniper@gmail.com>

chain/pool/txpool.go

@@ -112,6 +112,11 @@ func (tp *TxnPool) DropTxns() {
 		return true
 	})
 
+	tp.NanoPayTxs.Range(func(_, v interface{}) bool {
+		dropList = append(dropList, v.(*transaction.Transaction))
+		return true
+	})
+
 	heap.Init((*dropTxnsHeap)(&dropList))
 
 	for {
@@ -121,50 +126,59 @@ func (tp *TxnPool) DropTxns() {
 
 		txn := heap.Pop((*dropTxnsHeap)(&dropList)).(*transaction.Transaction)
 
-		account, err := txn.GetProgramHashes()
-		if err != nil {
-			continue
-		}
-
-		v, ok := tp.TxLists.Load(account[0])
-		if !ok {
-			continue
-		}
-
-		list, ok := v.(*NonceSortedTxs)
-		if !ok {
-			continue
-		}
-
-		_, ok, err = list.Drop(txn.Hash())
-		if err != nil {
-			continue
-		}
-
-		if ok {
-			tp.deleteTransactionFromMap(txn)
-			txnsDropped = append(txnsDropped, txn)
+		switch txn.UnsignedTx.Payload.Type {
+		case pb.NANO_PAY_TYPE:
+			if _, ok := tp.NanoPayTxs.Load(txn.Hash()); !ok {
+				continue
+			}
+			tp.NanoPayTxs.Delete(txn.Hash())
+		default:
+			account, err := txn.GetProgramHashes()
+			if err != nil {
+				continue
+			}
 
-			atomic.AddInt32(&tp.txnCount, -1)
-			atomic.AddInt64(&tp.txnSize, -int64(txn.GetSize()))
-			currentTxnCount--
-			currentTxnSize -= int64(txn.GetSize())
+			v, ok := tp.TxLists.Load(account[0])
+			if !ok {
+				continue
+			}
 
-			if !isTxPoolFull(currentTxnCount, currentTxnSize) {
-				break
+			list, ok := v.(*NonceSortedTxs)
+			if !ok {
+				continue
 			}
-		}
 
-		if list.Len() > 0 {
-			nonce, err := list.GetLatestNonce()
+			_, dropped, err := list.Drop(txn.Hash())
 			if err != nil {
 				continue
 			}
-			nextTxn, err := list.Get(nonce)
-			if err != nil {
+
+			if list.Len() > 0 {
+				nonce, err := list.GetLatestNonce()
+				if err != nil {
+					continue
+				}
+				nextTxn, err := list.Get(nonce)
+				if err != nil {
+					continue
+				}
+				heap.Push((*dropTxnsHeap)(&dropList), nextTxn)
+			}
+
+			if !dropped {
 				continue
 			}
-			heap.Push((*dropTxnsHeap)(&dropList), nextTxn)
+		}
+
+		txnsDropped = append(txnsDropped, txn)
+		tp.deleteTransactionFromMap(txn)
+		atomic.AddInt32(&tp.txnCount, -1)
+		atomic.AddInt64(&tp.txnSize, -int64(txn.GetSize()))
+		currentTxnCount--
+		currentTxnSize -= int64(txn.GetSize())
+
+		if !isTxPoolFull(currentTxnCount, currentTxnSize) {
+			break
 		}
 	}
 
@@ -287,6 +301,8 @@ func (tp *TxnPool) processTx(txn *transaction.Transaction) error {
 			}
 
 			tp.deleteTransactionFromMap(oldTxn)
+			atomic.AddInt32(&tp.txnCount, -1)
+			atomic.AddInt64(&tp.txnSize, -int64(oldTxn.GetSize()))
 		} else if list.Full() {
 			return errors.New("txpool per account list is full")
 		} else {
@@ -432,6 +448,7 @@ func (tp *TxnPool) GetAllTransactions() []*transaction.Transaction {
 		}
 		return true
 	})
+
 	tp.NanoPayTxs.Range(func(k, v interface{}) bool {
 		txs = append(txs, v.(*transaction.Transaction))
 		return true
@@ -455,6 +472,7 @@ func (tp *TxnPool) GetAllTransactionLists() map[common.Uint160][]*transaction.Tr
 
 		return true
 	})
+
 	tp.NanoPayTxs.Range(func(k, v interface{}) bool {
 		tx := v.(*transaction.Transaction)
 		addr, _ := common.ToCodeHash(tx.Programs[0].Code)
@@ -470,17 +488,20 @@ func (tp *TxnPool) GetAllTransactionLists() map[common.Uint160][]*transaction.Tr
 }
 
 func (tp *TxnPool) CleanSubmittedTransactions(txns []*transaction.Transaction) error {
-	txnsInPool := make([]*transaction.Transaction, 0)
+	txnsRemoved := make([]*transaction.Transaction, 0)
 
 	// clean submitted txs
 	for _, txn := range txns {
+		txnsToRemove := make([]*transaction.Transaction, 0)
+
 		switch txn.UnsignedTx.Payload.Type {
 		case pb.COINBASE_TYPE:
 			continue
 		case pb.SIG_CHAIN_TXN_TYPE:
 			continue
 		case pb.NANO_PAY_TYPE:
 			tp.NanoPayTxs.Delete(txn.Hash())
+			txnsToRemove = append(txnsToRemove, txn)
 		default:
 			sender, _ := common.ToCodeHash(txn.Programs[0].Code)
 			txNonce := txn.UnsignedTx.Nonce
@@ -490,32 +511,35 @@ func (tp *TxnPool) CleanSubmittedTransactions(txns []*transaction.Transaction) e
 					if _, err := list.Get(txNonce); err == nil {
 						nonce := list.getNonce(list.idx[0])
 						for i := 0; uint64(i) <= txNonce-nonce; i++ {
-							list.Pop()
-							atomic.AddInt32(&tp.txnCount, -1)
-							atomic.AddInt64(&tp.txnSize, -int64(txn.GetSize()))
+							t, err := list.Pop()
+							if err == nil {
+								txnsToRemove = append(txnsToRemove, t)
+							}
 						}
 					}
 				}
 			}
 		}
 
+		for _, t := range txnsToRemove {
+			txnsRemoved = append(txnsRemoved, t)
+			tp.deleteTransactionFromMap(t)
+			atomic.AddInt32(&tp.txnCount, -1)
+			atomic.AddInt64(&tp.txnSize, -int64(t.GetSize()))
+		}
+
 		tp.TxLists.Range(func(k, v interface{}) bool {
 			listLen := v.(*NonceSortedTxs).Len()
 			if listLen == 0 {
 				tp.TxLists.Delete(k)
 			}
 			return true
 		})
-
-		if _, ok := tp.TxMap.Load(txn.Hash()); ok {
-			txnsInPool = append(txnsInPool, txn)
-		}
-		tp.deleteTransactionFromMap(txn)
 	}
 
 	tp.blockValidationState.Lock()
 	defer tp.blockValidationState.Unlock()
-	return tp.CleanBlockValidationState(txnsInPool)
+	return tp.CleanBlockValidationState(txnsRemoved)
 }
 
 func (tp *TxnPool) addTransactionToMap(txn *transaction.Transaction) {