code: function decode(str) {
    let off = 0;
    let olen = 0;
    const slen = str.length;
    const stra = [];
    const len = str.length;
  
    while (off < slen - 1 && olen < len) {
      let code = str.charCodeAt(off++);
      const c1 = code < BASE64_INDEX.length ? BASE64_INDEX[code] : -1;
      code = str.charCodeAt(off++);
      const c2 = code < BASE64_INDEX.length ? BASE64_INDEX[code] : -1;
      if (c1 === -1 || c2 === -1) break;
      let o = (c1 << 2) >>> 0;
      o |= (c2 & 0x30) >> 4;
      stra.push(String.fromCharCode(o));
      if (++olen >= len || off >= slen) break;
      code = str.charCodeAt(off++);
      const c3 = code < BASE64_INDEX.length ? BASE64_INDEX[code] : -1;
      if (c3 === -1) break;
      o = ((c2 & 0x0f) << 4) >>> 0;
      o |= (c3 & 0x3c) >> 2;
      stra.push(String.fromCharCode(o));
      if (++olen >= len || off >= slen) break;
      code = str.charCodeAt(off++);
      const c4 = code < BASE64_INDEX.length ? BASE64_INDEX[code] : -1;
      o = ((c3 & 0x03) << 6) >>> 0;
      o |= c4;
      stra.push(String.fromCharCode(o));
      ++olen;
    }
    const buffa = [];
    for (off = 0; off < olen; off++) buffa.push(stra[off].charCodeAt(0));
    return Buffer.from(buffa);
  }
docs: Decodes a base64 encoded string using the bcrypt's base64 dictionary.
  @param {string} str String to decode.
  @returns {Buffer} The string decoded as a Buffer.
  @inner