121 lines
4.1 KiB
JavaScript
121 lines
4.1 KiB
JavaScript
var bignum = require('bignum');
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var scrypt = require('scrypt256-hash');
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var reverseBuffer = function(buff){
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var reversed = new Buffer(buff.length);
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for (var i = buff.length - 1; i >= 0; i--)
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reversed[buff.length - i - 1] = buff[i];
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return reversed;
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};
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/*
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var hash = new Buffer("38f3e68be0b74813af175b8da506dfa3c3017ff06fed7ae85e3efee655c9f7fd", 'hex');
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var goal = "8be6f3381348b7e08d5b17afa3df06a5f07f01c3e87aed6fe6fe3e5efdf7c955";
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var s = scrypt.digest(hash);
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console.log(s.toString('hex'));
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for (var i = 0; i < 20; i++) s.writeUInt32LE(s.readUInt32BE(i * 4), i * 4);
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var nHash = new Buffer(hash.length);
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for (var i = 0; i < 8; i++) nHash.writeUInt32LE(hash.readUInt32BE(i * 4), i * 4);
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console.log('maybe: ' + nHash.toString('hex'));
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var wow = bignum.fromBuffer(hash, {endian: 'little', size: 32}).toBuffer({endian: 'big', size: 32}).toString('hex');
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console.log(wow);
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console.log(wow == goal ? 'good' : 'fuck');
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*/
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/*
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var bb = new Buffer('0100000017a93c491d6e309cc53604cc32829a9610a95835e042f7c86a0b4455b8f5fbfe38f3e68be0b74813af175b8da506dfa3c3017ff06fed7ae85e3efee655c9f7fdb931ce520334011c000028cf', 'hex');
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var hash = scrypt.digest(bb);
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console.log(bignum.fromBuffer(hash, {endian: 'little', size: 32}).toString());
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*?
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/*
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var block = {
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hash: "409fd235e2fdc7182db92e13eed1b352081d9013ddc90e0acd817e378b8c1d1a",
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confirmations: 1,
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size: 1913,
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height: 493856,
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version: 1,
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merkleroot: "71669b50622da76f4d6940912e997b537006324e8a32ed06e8072c68abcd358f",
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tx: [
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"0d93c30ddc4b4802ec4724b238d730b7084ba19456ca5eeda8add1e4f86afab0",
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"79f0461b1b2596381eff80cc1b4929eb908d6f6f010f082d7f4762b8d8e8c573",
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"91b8d68ff49310174ceeefb2bb13765552676028108119ef2f8e5b29c8ed2487",
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"c02a588d2296c13d1d6aec449af916a966880b6f359d841e3f09df554ade28ac",
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"d043e490e4632fa48ac6fc3cbd6544e02116db39598aadb500fa7e3594bef9e3",
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"f839b2688042cb5b6338f982a7c1179f0f533d1ca219aa12537acac0c1a3f863"
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],
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time: 1389202213,
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nonce: 1370998784,
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bits: "1d011a75",
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difficulty: 0.90631872,
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previousblockhash: "be11244bda34c4c08c23fa7c61a5445f6daab25049a2c75b91309b58a68d9083"
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};
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var phpResult = "0100000083908da6589b30915bc7a24950b2aa6d5f44a5617cfa238cc0c434da4b2411be8f35cdab682c07e806ed328a4e320670537b992e9140694d6fa72d62509b6671258bcd52751a011d00c8b751";
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var header = new Buffer(80);
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var position = 0;
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header.writeUInt32BE(block.nonce, position);
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header.write(block.bits, position += 4, 4, 'hex');
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header.writeUInt32BE(block.time, position += 4);
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header.write(block.merkleroot, position += 4, 32, 'hex');
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header.write(block.previousblockhash, position += 32, 32, 'hex');
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header.writeUInt32BE(block.version, position += 32);
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var header = reverseBuffer(header);
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if (phpResult === header.toString('hex'))
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console.log('works!!!!!');
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else
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console.log('fuck');
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*/
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nonce = "cf280000";
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bits = "1c013403";
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time = "52ce31b9";
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merkleroot = "38f3e68be0b74813af175b8da506dfa3c3017ff06fed7ae85e3efee655c9f7fd";
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pbh = "fefbf5b855440b6ac8f742e03558a910969a8232cc0436c59c306e1d493ca917";
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version = 1;
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merkleroot = reverseBuffer(new Buffer(merkleroot, 'hex')).toString('hex');
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var serializeHeader = function(){
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var header = new Buffer(80);
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var position = 0;
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header.write(nonce, position, 4, 'hex');
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header.write(bits, position += 4, 4, 'hex');
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header.write(time, position += 4, 4, 'hex');
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header.write(merkleroot, position += 4, 32, 'hex');
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header.write(pbh, position += 32, 32, 'hex');
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header.writeUInt32BE(version, position + 32);
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var header = reverseBuffer(header);
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return header;
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};
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var headerBuff = serializeHeader();
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var headerHashed = scrypt.digest(headerBuff);
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var hashInt = bignum.fromBuffer(headerHashed, {endian: 'little', size: 32});
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//var diffDividend = bignum.fromBuffer(new Buffer('0000ffff00000000000000000000000000000000000000000000000000000000'), 'hex');
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//var target = diffDividend.div(16)
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var dividend = 0x0000ffff00000000000000000000000000000000000000000000000000000000;
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var target = dividend / 16;
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var big = bignum(target);
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console.log('dividend ' + big.toString());
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console.log('hash ' + hashInt.toString())
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console.log('target ' + target.toString()); |