50 lines
1 KiB
JavaScript
50 lines
1 KiB
JavaScript
/*!
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* mine.js - mining function for hsd
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* Copyright (c) 2017-2018, Christopher Jeffrey (MIT License).
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* https://github.com/handshake-org/hsd
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*/
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'use strict';
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const {Miner} = require('bcuckoo');
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const consensus = require('../protocol/consensus');
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/**
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* Hash until the nonce overflows.
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* @alias module:mining.mine
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* @param {Buffer} hdr
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* @param {Buffer} target
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* @param {Number} rounds
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* @param {Object} params
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* @returns {Buffer|null}
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*/
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function mine(hdr, target, rounds, params) {
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const {bits, size, perc} = params;
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const miner = new Miner(bits, size, perc);
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const nonce = hdr.slice(consensus.NONCE_POS);
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// The heart and soul of the miner: match the target.
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for (let i = 0; i < rounds; i++) {
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const sol = miner.mineHeader(hdr);
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if (sol && sol.sha3().compare(target) <= 0)
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return [nonce, sol];
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for (let j = 0; j < consensus.NONCE_SIZE; j++) {
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if (nonce[j] !== 0xff) {
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nonce[j] += 1;
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break;
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}
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nonce[j] = 0;
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}
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}
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return [nonce, null];
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}
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/*
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* Expose
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*/
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module.exports = mine;
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