Defeat Fingerprint Sensor

There is definitely something fishy going on in Kringle Castle. It might be time to explore Santa's office for any information on the culprit.

Objective

Bypass the Santavator fingerprint sensor. Enter Santa's office without Santa's fingerprint.

Difficulty: 3/5

Solution

Looking at the code that runs the elevator, we see that btn4 (the button for Santa's Office) has a different function that handles click() events:

const handleBtn4 = () => {
  const cover = document.querySelector('.print-cover');
  cover.classList.add('open');

  cover.addEventListener('click', () => {
    if (btn4.classList.contains('powered') && hasToken('besanta')) {
      $.ajax({
        type: 'POST',
        url: POST_URL,
        dataType: 'json',
        contentType: 'application/json',
        data: JSON.stringify({
          targetFloor: '3',
          id: getParams.id,
        }),
        success: (res, status) => {
          if (res.hash) {
            __POST_RESULTS__({
              resourceId: getParams.id || '1111',
              hash: res.hash,
              action: 'goToFloor-3',
            });
          }
        }
      });
    } else {
      __SEND_MSG__({
        type: 'sfx',
        filename: 'error.mp3',
      });
    }
  });
};

Of particular note are the checks on line 5: a check to see that the button has a class powered, and that the user has a token besanta. Solving the hasToken('besanta') check is simple: the function hasToken checks for the existance of an item in the tokens list. In the JavaScript console, we can add besanta to tokens with tokens.push('besanta').

Solving the powered is a bit trickier. The powered class is added to the button by the function renderTraps(), called inside a continually-updating event loop for drawing the Sparkle Stream on the screen. Manually adding powered as a class to the button, or modifying the powered[] object in the JavaScript console results in the powered state being removed. One can build a rather convoluted method to split and color the Sparkle Stream:

But there is a simpler solution: power a single receiver, such as the green one:

Then change what floor the button sends us to when it is clicked. Open the elevator panel, make sure the green receiver is powered, then open the Developer tools. In the Inspector tab, find the one of the buttons that has the powered class:

Then, edit the data_floor attribute to be 3 (the floor number of Santa's Office):

Click the modified button, and you'll be taken to Santa's Office.

Answer

Visit Santa's Office.