burstcoin.jminer.core.checker.task.OCLCheckerFindAllBelowTargetTask.java Source code

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Here is the source code for burstcoin.jminer.core.checker.task.OCLCheckerFindAllBelowTargetTask.java

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/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2016 by luxe - https://github.com/de-luxe - BURST-LUXE-RED2-G6JW-H4HG5
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
 * and associated documentation files (the "Software"), to deal in the Software without restriction,
 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software
 * is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies
 * or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */

package burstcoin.jminer.core.checker.task;

import burstcoin.jminer.core.checker.event.CheckerDevResultEvent;
import burstcoin.jminer.core.checker.util.OCLChecker;
import burstcoin.jminer.core.network.model.DevPoolResult;
import fr.cryptohash.Shabal256;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;
import pocminer.generate.MiningPlot;

import java.math.BigInteger;
import java.util.ArrayList;
import java.util.List;

/**
 * The type OCL checker find all below target task.
 */
@Component
@Scope("prototype")
public class OCLCheckerFindAllBelowTargetTask implements Runnable {
    private static final Logger LOG = LoggerFactory.getLogger(OCLCheckerFindAllBelowTargetTask.class);

    @Autowired
    private ApplicationEventPublisher publisher;

    private final OCLChecker oclChecker;

    private long blockNumber;
    private byte[] generationSignature;
    private byte[] scoops;
    private long chunkPartStartNonce;
    private long targetDeadline;
    private long baseTarget;

    /**
     * Instantiates a new OCL checker find all below target task.
     *
     * @param oclChecker the ocl checker
     */
    @Autowired
    public OCLCheckerFindAllBelowTargetTask(OCLChecker oclChecker) {
        this.oclChecker = oclChecker;
    }

    /**
     * Init void.
     *
     * @param blockNumber the block number
     * @param generationSignature the generation signature
     * @param scoops the scoops
     * @param targetDeadline the target deadline
     * @param chunkPartStartNonce the chunk part start nonce
     * @param baseTarget the base target
     */
    public void init(long blockNumber, byte[] generationSignature, byte[] scoops, long targetDeadline,
            long chunkPartStartNonce, long baseTarget) {
        this.blockNumber = blockNumber;
        this.generationSignature = generationSignature;
        this.scoops = scoops;
        this.targetDeadline = targetDeadline;
        this.chunkPartStartNonce = chunkPartStartNonce;
        this.baseTarget = baseTarget;
    }

    @Override
    public void run() {
        int[] lowestNonces;
        synchronized (oclChecker) {
            // todo not working?!
            lowestNonces = oclChecker.findTarget(generationSignature, scoops, targetDeadline);
        }

        if (lowestNonces != null) {
            List<DevPoolResult> devPoolResults = new ArrayList<>();
            for (int lowestNonce : lowestNonces) {
                long nonce = chunkPartStartNonce + lowestNonce;
                BigInteger result = calculateResult(scoops, generationSignature, lowestNonce);
                BigInteger deadline = result.divide(BigInteger.valueOf(baseTarget));
                long calculatedDeadline = deadline.longValue();

                devPoolResults.add(new DevPoolResult(blockNumber, calculatedDeadline, nonce, chunkPartStartNonce));
            }
            publisher.publishEvent(new CheckerDevResultEvent(blockNumber, chunkPartStartNonce, devPoolResults));
        } else {
            publisher.publishEvent(new CheckerDevResultEvent(blockNumber, chunkPartStartNonce, null));
        }
    }

    private BigInteger calculateResult(byte[] scoops, byte[] generationSignature, int nonce) {
        Shabal256 md = new Shabal256();
        md.reset();
        md.update(generationSignature);
        md.update(scoops, nonce * MiningPlot.SCOOP_SIZE, MiningPlot.SCOOP_SIZE);
        byte[] hash = md.digest();
        return new BigInteger(1,
                new byte[] { hash[7], hash[6], hash[5], hash[4], hash[3], hash[2], hash[1], hash[0] });
    }
}