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POW.js
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POW.js
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function PoW(data, options) {
console.log('Searching for genesis hash...');
var nonce = options.nonce;
//var target = $.numToBytes((options.bits & 0xffffff) * 2 ** (8 * ((options.bits >> 24) - 3)));
// console.log('' + target.toString('hex'));
while (true) {
var hash = $.reverseBuffer(Hash[options.algorithm](data)).toString('hex');
// var hash2 = $.reverseBuffer(hash).toString('hex');
// var val = parseInt(hash2, 16);
if (hash.match(/^00007/)) {
console.log("nonce: %s", nonce);
console.log("genesis hash: %s", hash);
return;
} else {
nonce += 1;
//console.log('^^^^^^'+nonce+'');
//console.log("genesis hash: %s", hash);
// if (nonce % 2000 == 0) {
// console.log("nonce: %s | hash: %s ", nonce, hash.toString('hex'));
// }
data.writeInt32LE(nonce, data.length - 4);
}
}
}
function createBlock(merkleRoot, options) {
var block = Buffer.alloc(80);
var position = 0;
block.writeIntLE(1, position); //version
block.write(new Buffer(32).toString('hex'), position += 4, 32, 'hex'); //previousblockhash
block.write(merkleRoot.toString('hex'), position += 32, 32, 'hex');
block.writeInt32LE(options.time, position += 32);
block.writeInt32LE(options.bits, position += 4);
block.writeIntLE(options.nonce, position += 4);
return block;
};