export function stringToHex(str: string): string {
  const arr: string[] = [];
  const encode = encodeURIComponent(str);

  for (let i = 0; i < encode.length; i++) {
    arr[i] = (encode.charCodeAt(i).toString(16)).slice(-4);
  }

  return arr.join('');
}

export function hexToString(hex: string): string {
  const arr = hex.split('');
  let out = '';

  for (let i = 0; i < arr.length / 2; i++) {
    const tmp = parseInt('0x' + arr[i * 2] + arr[i * 2 + 1], 16);
    const charValue = String.fromCharCode(tmp);

    out += charValue;
  }

  return decodeURIComponent(out);
}