const fs = require('fs');
const { utils, bcs, crypto_hash } = require('@starcoin/starcoin');

const module_address = "your_module_address";
const mvFile = "path_to_your_mv_file";
const payload = utils.tx.encodePackage(module_address, [fs.readFileSync(mvFile)]);

const s = (function () {
  const se = new bcs.BcsSerializer();
  payload.value.serialize(se);   // 这里要用 payload.value, 因为 payload 是 TransactionPayloadVariantPackage 结构，我们要用 Package 结构
  return se.getBytes();
})();
const package_hash = crypto_hash.createHash("Package").crypto_hash(s);  // 这里是固定的 Prefix:  Package
console.log(package_hash)