Coverage Summary for Class: TxValidatorNonceRangeValidator (co.rsk.net.handler.txvalidator)

Class Class, % Method, % Line, %
TxValidatorNonceRangeValidator 100% (1/1) 100% (2/2) 83.3% (10/12)


1 /* 2  * This file is part of RskJ 3  * Copyright (C) 2017 RSK Labs Ltd. 4  * 5  * This program is free software: you can redistribute it and/or modify 6  * it under the terms of the GNU Lesser General Public License as published by 7  * the Free Software Foundation, either version 3 of the License, or 8  * (at your option) any later version. 9  * 10  * This program is distributed in the hope that it will be useful, 11  * but WITHOUT ANY WARRANTY; without even the implied warranty of 12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13  * GNU Lesser General Public License for more details. 14  * 15  * You should have received a copy of the GNU Lesser General Public License 16  * along with this program. If not, see <http://www.gnu.org/licenses/>. 17  */ 18  19 package co.rsk.net.handler.txvalidator; 20  21 import co.rsk.core.Coin; 22 import co.rsk.net.TransactionValidationResult; 23 import org.ethereum.core.AccountState; 24 import org.ethereum.core.Transaction; 25  26 import javax.annotation.Nullable; 27 import java.math.BigInteger; 28  29 /** 30  * Checks that the transaction nonce is not too higher than the account 31  * nonce. This helps limiting the in memory transactions for a given address 32  */ 33 public class TxValidatorNonceRangeValidator implements TxValidatorStep { 34  35  private final BigInteger accountSlots; 36  37  public TxValidatorNonceRangeValidator(int accountSlots) { 38  if (accountSlots < 1) { 39  throw new IllegalArgumentException("accountSlots"); 40  } 41  this.accountSlots = BigInteger.valueOf(accountSlots); 42  } 43  44  @Override 45  public TransactionValidationResult validate(Transaction tx, @Nullable AccountState state, BigInteger gasLimit, Coin minimumGasPrice, long bestBlockNumber, boolean isFreeTx) { 46  BigInteger nonce = tx.getNonceAsInteger(); 47  BigInteger stateNonce = state == null ? BigInteger.ZERO : state.getNonce(); 48  49  if (stateNonce.compareTo(nonce) > 0) { 50  return TransactionValidationResult.withError("transaction nonce too low"); 51  } 52  if (stateNonce.add(accountSlots).compareTo(nonce) <= 0) { 53  return TransactionValidationResult.withError("transaction nonce too high"); 54  } 55  56  return TransactionValidationResult.ok(); 57  } 58  59 }