verify-primedice.js

const serverHash = "d280d20edc8da0944f9893fe4e8e3b2010d197ef19f83856ebdd930866d54d04";
const clientSeed = "732d81dc27d5fa9d";
var nonce = 3000;

const roll_prime_dice = function (key, text) {
	// create HMAC using server seed as key and client seed as message
	const hash = crypto
		.createHmac('sha512', key)
		.update(text)
		.digest('hex');

	let index = 0;
	const j = 5;

	let lucky = parseInt(hash.substring(index * j, index * j + j), 16);

	// keep grabbing characters from the hash while greater than
	while (lucky >= Math.pow(10, 6)) {
		index++;
		lucky = parseInt(hash.substring(index * j, index * j + j), 16);

		// if we reach the end of the hash, just default to highest number
		if (index * 5 + 5 > 128) {
			lucky = 9999;
			break;
		}
	}
	// commented out to get the largest possible value.
	//lucky %= Math.pow(10, 4);
	//lucky /= Math.pow(10, 2);

	return lucky;
};

function generate(count) {
	var out = []
	for (var i=0; i < count; i++) {
		const e = jsData[Math.floor(Math.random()*500)]
		const str = e.blocksig + "" + e.tx + "0";
		// var buffer = createHash("sha256").update(str).digest()
		const n = roll_prime_dice(serverHash, `${clientSeed}-${nonce}`)
		//var n = randomN2(chainId, buffer, 0, Math.pow(2,32))
		nonce++;
		out.push(n)
  }
  return out;
}