Coverage Summary for Class: BlockParentGasLimitRule (co.rsk.validators)

Class Class, % Method, % Line, %
BlockParentGasLimitRule 0% (0/1) 0% (0/4) 0% (0/17)


1 /* 2  * This file is part of RskJ 3  * Copyright (C) 2017 RSK Labs Ltd. 4  * (derived from ethereumJ library, Copyright (c) 2016 <ether.camp>) 5  * 6  * This program is free software: you can redistribute it and/or modify 7  * it under the terms of the GNU Lesser General Public License as published by 8  * the Free Software Foundation, either version 3 of the License, or 9  * (at your option) any later version. 10  * 11  * This program is distributed in the hope that it will be useful, 12  * but WITHOUT ANY WARRANTY; without even the implied warranty of 13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14  * GNU Lesser General Public License for more details. 15  * 16  * You should have received a copy of the GNU Lesser General Public License 17  * along with this program. If not, see <http://www.gnu.org/licenses/>. 18  */ 19  20 package co.rsk.validators; 21  22 import org.ethereum.core.Block; 23 import org.ethereum.core.BlockHeader; 24 import org.slf4j.Logger; 25 import org.slf4j.LoggerFactory; 26  27 import java.math.BigInteger; 28  29 /** 30  * Checks if {@link BlockHeader#gasLimit} matches gas limit bounds. <br> 31  * 32  * This check is NOT run in Frontier 33  * 34  * @author Mikhail Kalinin 35  * @since 02.09.2015 36  */ 37 public class BlockParentGasLimitRule implements BlockParentDependantValidationRule, BlockHeaderParentDependantValidationRule { 38  39  private static final Logger logger = LoggerFactory.getLogger("blockvalidator"); 40  41  private int gasLimitBoundDivisor; 42  43  public BlockParentGasLimitRule(int gasLimitBoundDivisor) { 44  if (gasLimitBoundDivisor < 1) { 45  throw new IllegalArgumentException("The gasLimitBoundDivisor argument must be strictly greater than 0"); 46  } 47  48  this.gasLimitBoundDivisor = gasLimitBoundDivisor; 49  } 50  51  52  @Override 53  public boolean isValid(BlockHeader header, Block parent) { 54  if (header == null || parent == null) { 55  logger.warn("BlockParentGasLimitRule - block or parent are null"); 56  return false; 57  } 58  59  BlockHeader parentHeader = parent.getHeader(); 60  BigInteger headerGasLimit = new BigInteger(1, header.getGasLimit()); 61  BigInteger parentGasLimit = new BigInteger(1, parentHeader.getGasLimit()); 62  63  if (headerGasLimit.compareTo(parentGasLimit.multiply(BigInteger.valueOf(gasLimitBoundDivisor - 1L)).divide(BigInteger.valueOf(gasLimitBoundDivisor))) < 0 || 64  headerGasLimit.compareTo(parentGasLimit.multiply(BigInteger.valueOf(gasLimitBoundDivisor + 1L)).divide(BigInteger.valueOf(gasLimitBoundDivisor))) > 0) { 65  logger.warn(String.format("#%d: gas limit exceeds parentBlock.getGasLimit() (+-) GAS_LIMIT_BOUND_DIVISOR", header.getNumber())); 66  return false; 67  } 68  return true; 69  } 70  71  @Override 72  public boolean isValid(Block block, Block parent) { 73  return isValid(block.getHeader(), parent); 74  } 75 }