Coverage Summary for Class: DifficultyUtils (co.rsk.util)
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Method, %
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DifficultyUtils |
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(0/6)
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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.util;
20
21 import co.rsk.core.BlockDifficulty;
22
23 import java.math.BigInteger;
24
25 /**
26 * Created by martin.medina on 4/8/16.
27 */
28 public class DifficultyUtils {
29
30 public static final BigInteger MAX = BigInteger.valueOf(2).pow(256);
31
32 public static BigInteger difficultyToTarget(BlockDifficulty difficulty) {
33
34 BigInteger resultDifficulty = difficulty.asBigInteger();
35
36 if (resultDifficulty.compareTo(BigInteger.valueOf(2)) < 1) {
37 // minDifficulty is 3 because target needs to be of length 256
38 // and not have 1 in the position 255 (count start from 0)
39 resultDifficulty = BigInteger.valueOf(3);
40 }
41
42 return MAX.divide(resultDifficulty);
43 }
44 }