Coverage Summary for Class: GetMergedMiningTags (co.rsk.pcc.blockheader)
Class |
Class, %
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Method, %
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Line, %
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GetMergedMiningTags |
0%
(0/1)
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0%
(0/3)
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0%
(0/11)
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1 /*
2 * This file is part of RskJ
3 * Copyright (C) 2019 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.pcc.blockheader;
21
22 import co.rsk.config.RskMiningConstants;
23 import co.rsk.pcc.ExecutionEnvironment;
24 import org.apache.commons.lang3.ArrayUtils;
25 import org.ethereum.core.Block;
26 import org.ethereum.core.CallTransaction;
27 import org.ethereum.util.ByteUtil;
28
29 import java.util.Arrays;
30 import java.util.Collections;
31 import java.util.List;
32
33 /**
34 * This implements the "getMergedMiningTags" method
35 * that belongs to the BlockHeaderContract native contract.
36 *
37 * @author Diego Masini
38 */
39 public class GetMergedMiningTags extends BlockHeaderContractMethod {
40 private final CallTransaction.Function function = CallTransaction.Function.fromSignature(
41 "getMergedMiningTags",
42 new String[]{"int256"},
43 new String[]{"bytes"}
44 );
45
46 public GetMergedMiningTags(ExecutionEnvironment executionEnvironment, BlockAccessor blockAccessor) {
47 super(executionEnvironment, blockAccessor);
48 }
49
50 @Override
51 public CallTransaction.Function getFunction() {
52 return function;
53 }
54
55 @Override
56 protected Object internalExecute(Block block, Object[] arguments) {
57 byte[] mergedMiningTx = block.getBitcoinMergedMiningCoinbaseTransaction();
58
59 List<Byte> mergedMiningTxAsList = Arrays.asList(ArrayUtils.toObject(mergedMiningTx));
60 List<Byte> rskTagBytesAsList = Arrays.asList(ArrayUtils.toObject(RskMiningConstants.RSK_TAG));
61
62 int rskTagPosition = Collections.lastIndexOfSubList(mergedMiningTxAsList, rskTagBytesAsList);
63
64 // if RSK Tag not found, return an empty byte array
65 if (rskTagPosition == -1) {
66 return ByteUtil.EMPTY_BYTE_ARRAY;
67 }
68
69 int additionalTagsStartIndex = rskTagPosition + RskMiningConstants.RSK_TAG.length + RskMiningConstants.BLOCK_HEADER_HASH_SIZE;
70 return Arrays.copyOfRange(mergedMiningTx, additionalTagsStartIndex, mergedMiningTx.length);
71 }
72 }