Coverage Summary for Class: BtcTransactionFormatUtils (co.rsk.peg.utils)

Class Class, % Method, % Line, %
BtcTransactionFormatUtils 0% (0/1) 0% (0/5) 0% (0/14)


1 /* 2  * This file is part of RskJ 3  * Copyright (C) 2018 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.peg.utils; 20  21 import co.rsk.bitcoinj.core.Sha256Hash; 22 import co.rsk.bitcoinj.core.VarInt; 23 import org.ethereum.config.blockchain.upgrades.ActivationConfig; 24 import org.ethereum.config.blockchain.upgrades.ConsensusRule; 25  26 public class BtcTransactionFormatUtils { 27  28  private static final int MIN_BLOCK_HEADER_SIZE = 80; 29  private static final int MAX_BLOCK_HEADER_SIZE = 85; 30  31  public static Sha256Hash calculateBtcTxHash(byte[] btcTxSerialized) { 32  return Sha256Hash.wrapReversed(Sha256Hash.hashTwice(btcTxSerialized)); 33  } 34  35  public static long getInputsCount(byte[] btcTxSerialized) { 36  VarInt inputsCounter = new VarInt(btcTxSerialized, 4); 37  return inputsCounter.value; 38  } 39  40  public static long getInputsCountForSegwit(byte[] btcTxSerialized) { 41  VarInt inputsCounter = new VarInt(btcTxSerialized, 4); 42  43  if (inputsCounter.value != 0) { 44  return -1; 45  } 46  47  inputsCounter = new VarInt(btcTxSerialized, 5); 48  49  if (inputsCounter.value != 1) { 50  return -1; 51  } 52  53  inputsCounter = new VarInt(btcTxSerialized, 6); 54  return inputsCounter.value; 55  } 56  57  public static boolean isBlockHeaderSize(int size, ActivationConfig.ForBlock activations) { 58  return (activations.isActive(ConsensusRule.RSKIP124) && size == MIN_BLOCK_HEADER_SIZE) || 59  (!activations.isActive(ConsensusRule.RSKIP124) && size >= MIN_BLOCK_HEADER_SIZE 60  && size <= MAX_BLOCK_HEADER_SIZE); 61  } 62 }