/**
 * RFC 4648 base32 alphabet without pad.
 * @type {string}
 */ const ALPHABET = "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567";
/**
 * Converts a base32 string to an Uint8Array (RFC 4648).
 * @see [LinusU/base32-decode](https://github.com/LinusU/base32-decode)
 * @param {string} str Base32 string.
 * @returns {Uint8Array} Uint8Array.
 */ const base32Decode = (str) => {
  // remove spaces
  str = str.replaceAll(" ", "");
  // Canonicalize to all upper case and remove padding if it exists.
  let end = str.length;
  while (str[end - 1] === "=") --end;
  const cstr = (end < str.length ? str.substring(0, end) : str).toUpperCase();
  const buf = new ArrayBuffer(((cstr.length * 5) / 8) | 0);
  const arr = new Uint8Array(buf);
  let bits = 0;
  let value = 0;
  let index = 0;
  for (let i = 0; i < cstr.length; i++) {
    const idx = ALPHABET.indexOf(cstr[i]);
    if (idx === -1) throw new TypeError(`Invalid character found in ${str}: ${cstr[i]}`);
    value = (value << 5) | idx;
    bits += 5;
    if (bits >= 8) {
      bits -= 8;
      arr[index++] = value >>> bits;
    }
  }
  return arr;
};