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Merge pull request #1156 from ethereum/sharding/block-processing
Beacon chain block processing
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ethereumj-core/src/main/java/org/ethereum/sharding/domain/Beacon.java
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| /* | ||
| * Copyright (c) [2016] [ <ether.camp> ] | ||
| * This file is part of the ethereumJ library. | ||
| * | ||
| * The ethereumJ library is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU Lesser General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * The ethereumJ library is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU Lesser General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Lesser General Public License | ||
| * along with the ethereumJ library. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
| package org.ethereum.sharding.domain; | ||
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|
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| import org.ethereum.datasource.Serializer; | ||
| import org.ethereum.util.ByteUtil; | ||
| import org.ethereum.util.FastByteComparisons; | ||
| import org.ethereum.util.RLP; | ||
| import org.ethereum.util.RLPList; | ||
| import org.spongycastle.util.encoders.Hex; | ||
|
|
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| import java.math.BigInteger; | ||
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| import static org.ethereum.crypto.HashUtil.blake2b; | ||
|
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| /** | ||
| * Beacon chain block structure. | ||
| * | ||
| * @author Mikhail Kalinin | ||
| * @since 14.08.2018 | ||
| */ | ||
| public class Beacon { | ||
|
|
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| /* Hash of the parent block */ | ||
| private byte[] parentHash; | ||
| /* Randao commitment reveal */ | ||
| private byte[] randaoReveal; | ||
| /* Reference to main chain block */ | ||
| private byte[] mainChainRef; | ||
| /* Hash of the state */ | ||
| private byte[] stateHash; | ||
| /* Slot number */ | ||
| private long slotNumber; | ||
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| public Beacon(byte[] parentHash, byte[] randaoReveal, byte[] mainChainRef, byte[] stateHash, long slotNumber) { | ||
| this.parentHash = parentHash; | ||
| this.randaoReveal = randaoReveal; | ||
| this.mainChainRef = mainChainRef; | ||
| this.stateHash = stateHash; | ||
| this.slotNumber = slotNumber; | ||
| } | ||
|
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| public Beacon(byte[] rlp) { | ||
| RLPList items = RLP.unwrapList(rlp); | ||
| this.parentHash = items.get(0).getRLPData(); | ||
| this.randaoReveal = items.get(1).getRLPData(); | ||
| this.mainChainRef = items.get(2).getRLPData(); | ||
| this.stateHash = items.get(3).getRLPData(); | ||
| this.slotNumber = ByteUtil.bytesToBigInteger(items.get(4).getRLPData()).longValue(); | ||
| } | ||
|
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| public byte[] getEncoded() { | ||
| return RLP.wrapList(parentHash, randaoReveal, mainChainRef, stateHash, | ||
| BigInteger.valueOf(slotNumber).toByteArray()); | ||
| } | ||
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| public byte[] getHash() { | ||
| return blake2b(getEncoded()); | ||
| } | ||
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| public byte[] getParentHash() { | ||
| return parentHash; | ||
| } | ||
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| public byte[] getRandaoReveal() { | ||
| return randaoReveal; | ||
| } | ||
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| public byte[] getMainChainRef() { | ||
| return mainChainRef; | ||
| } | ||
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| public byte[] getStateHash() { | ||
| return stateHash; | ||
| } | ||
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| public long getSlotNumber() { | ||
| return slotNumber; | ||
| } | ||
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| public boolean isParentOf(Beacon other) { | ||
| return FastByteComparisons.equal(this.getParentHash(), other.getHash()); | ||
| } | ||
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| public void setStateHash(byte[] stateHash) { | ||
| this.stateHash = stateHash; | ||
| } | ||
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| @Override | ||
| public boolean equals(Object other) { | ||
| if (this == other) return true; | ||
| if (!(other instanceof Beacon)) return false; | ||
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| return FastByteComparisons.equal(this.getHash(), ((Beacon) other).getHash()); | ||
| } | ||
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| @Override | ||
| public String toString() { | ||
| return "#" + getSlotNumber() + " (" + Hex.toHexString(getHash()).substring(0,6) + " <~ " | ||
| + Hex.toHexString(getParentHash()).substring(0,6) + ")"; | ||
| } | ||
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| public boolean isGenesis() { | ||
| return this.slotNumber == 0L; | ||
| } | ||
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| public static final Serializer<Beacon, byte[]> Serializer = new Serializer<Beacon, byte[]>() { | ||
| @Override | ||
| public byte[] serialize(Beacon block) { | ||
| return block == null ? null : block.getEncoded(); | ||
| } | ||
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| @Override | ||
| public Beacon deserialize(byte[] stream) { | ||
| return stream == null ? null : new Beacon(stream); | ||
| } | ||
| }; | ||
| } |
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