stupid-miner/js/miner-cpu/mining-process.js

var cryptutil = require("../cryptutil");

var {
	coinb1, coinb2, merkleBranch,
	difficulty, exnounce1, exnounce2, iters
} = JSON.parse(process.argv[2]);

var start = exnounce2.toString("hex");

coinb1 = Buffer.from(coinb1, "hex");
coinb2 = Buffer.from(coinb2, "hex");
exnounce1 = Buffer.from(exnounce1, "hex");
exnounce2 = Buffer.from(exnounce2, "hex");


//stratnum difficulty = nbits "encoded current network difficulty"
difficulty = 5;

var hashes = 0;
var sd = new Date().getTime();
for (var i = 0; i < iters; ++i) {
	var coinbase =
		cryptutil.createCoinbase(exnounce1, exnounce2, coinb1, coinb2);
	var cbHash = cryptutil.createCbHash(coinbase);

	//build merkle root
	//create block header


	//check block header starts with 0000
	var success = true;
	for (var i = 0; i < difficulty; ++i) {
		if (cbHash[i] !== 0) {
			success = false;
			break;
		}
	}

	hashes += 1;
	var d = new Date().getTime();
	if (d - 2000 >= sd) {
		console.log("h"+Math.floor(hashes / 2));

		sd = d;
		hashes = 0;
	}

	if (success) {
		console.log("o"+cbHash.toString("hex"));
		//send hash back to server
		process.exit(0);
	}

	cryptutil.incbufBE(exnounce2);
	if (exnounce2[0] == 255) {
		console.error("exnounce2[0] reached 255");
		process.exit(1);
	}
}

console.error("iterated through "+iters);
process.exit(1);