BitChop

const crypto = require("crypto")

function gameResult(seed, salt) {
  const nBits = 52 // number of most significant bits to use

  // 1. HMAC_SHA256(key=salt, message=seed)
  const hmac = crypto.createHmac("sha256", salt)
  hmac.update(seed)
  seed = hmac.digest("hex")

danielevns

const { createHash, createHmac } = require("crypto");

const salt = "0000000000000000004d6ec16dafe9d8370958664c1dc422f452892264c59526"; // chosen in seeding event: https://bitcointalk.org/index.php?topic=2807542.msg28778130#msg28778130

let [id, hash] = process.argv.slice(2);

id = Number(id);
if (Number.isNaN(id) || !Number.isSafeInteger(id) || id < 1) {
  printUsageMessage();
  process.exit(1);