function parse_form_data(event) {
  const formData = new FormData(event.target);
  const json = {};

  for (const [key, value] of formData.entries()) {
    json[key] = value;
  }

  return json;
}

async function computeSha256(message) {
  const msgUint8 = new TextEncoder().encode(message);
  const hashBuffer = await window.crypto.subtle.digest("SHA-256", msgUint8);
  const hashArray = Array.from(new Uint8Array(hashBuffer));
  const hashHex = hashArray.map((b) => b.toString(16).padStart(2, "0")).join("");
  return hashHex;
}

function randStr() {
  return Math.floor(Math.random()*16777215).toString(16);
}