challenge.ts

import {enigma, sha1} from 'sway-labs/ciphers';
import {Injector} from 'sway-labs/strings/utils';
import {OCR} from 'sway-labs/vision';

/**
 * Overcomplicated decoding function returning the answer of the challenge.
 * @param {string} input Some encrypted string.
 * @returns {Promise<string>} Possibly the decrypted answer to this non-sense.
 */
async function decode(input: string): Promise<string> {
  const a = enigma(input, 'ch-k', ['UKW', 1, 1], ['III', 1, 3], ['II', 16, 26], ['I', 10, 6]);
  const i = new Injector(a);
  const b = i.inject(RFC_2396_RESERVED_CHARACTERS);
  const [c, d] = b.split('=');
  const e = Array.from(d);
  e.splice(6, 0, '-6');
  const f = e
    .map(c => ['v', 'q', 'k', 'm', 't', 'x', 's'].includes(c) && c.toUpperCase() || c)
    .join('');
  const g = `${c}=${f}&t=182`;
  const h = await OCR.read({from: g});
  const [j] = h.results[0].match(/([^i])+/g);
  return sha1(j);
}

const solution = await decode('bslwhbvqqifvnxjixhteoypnmjnernnlx');

// TODO: Understand what this `decode()` call actually returns.
// See you on https://www.swayapp.io/<insert `solution` here> 🙃