baileytownsend.dev
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bad-example.com
1Now to really get your hands dirty. It's time to build your own CAR.
2
3The CAR libraries listed in **Part one** above can help with this, or you can hand-craft every byte if you're that hardcore.
4
5Your CAR just needs to have one very specific record to pass this challenge:
6
7- **Collection:** `codes.advent.challenge.day`
8- **Rkey:** `three`
9
10Inside the record, we'll be looking for:
11
12- `"verificationCode": "{{code}}"`
13
14Any valid `DID` will do for the commit, and the signature won't be verified.
15
16
17<form id="car-upload" method="post" action="/day/3/upload-car" enctype="multipart/form-data">
18 <div id="drop-zone" style="border-radius: 0.5rem; padding: 1.25rem 1.5rem; text-align: center; cursor: pointer; max-width: 28rem;">
19 <p id="drop-label" style="display: flex; align-items: center; gap: 0.75rem; margin: 0; color: var(--color-primary)">
20 Drop your CAR off here <small style="opacity: 0.667">(or click to browse)</small>
21 </p>
22 <div id="drop-file-name" class="hidden" style="font-family: monospace; font-size: 0.875rem;"></div>
23 <input id="car-input" type="file" name="car_file" accept=".car" class="hidden" required />
24 </div>
25</form>
26
27<script>
28(function() {
29 const form = document.getElementById('car-upload');
30 const zone = document.getElementById('drop-zone');
31 const input = document.getElementById('car-input');
32 const label = document.getElementById('drop-label');
33 const fileName = document.getElementById('drop-file-name');
34
35 function trySubmit(file) {
36 if (file.size > 2 * Math.pow(2, 20)) {
37 alert('Are sending a car or a damn truck??? (max 2MB)');
38 return;
39 }
40 label.classList.add('hidden');
41 fileName.classList.remove('hidden');
42 fileName.textContent = 'Uploading ' + file.name + '...';
43 form.submit();
44 }
45
46 zone.addEventListener('click', function() { input.click(); });
47
48 input.addEventListener('change', function() {
49 if (input.files[0]) trySubmit(input.files[0]);
50 });
51
52 zone.addEventListener('dragover', function(e) {
53 e.preventDefault();
54 zone.classList.add('dragging');
55 });
56
57 zone.addEventListener('dragleave', function() {
58 zone.classList.remove('dragging');
59 });
60
61 zone.addEventListener('drop', function(e) {
62 e.preventDefault();
63 zone.style.borderColor = 'oklch(0.7 0 0)';
64 var file = e.dataTransfer.files[0];
65 if (file) {
66 input.files = e.dataTransfer.files;
67 trySubmit(file);
68 }
69 });
70})();
71</script>
72<style>
73#drop-zone {
74 border: 1px dashed oklch(0.7 0 0);
75}
76#drop-zone.dragging,
77#drop-zone:hover {
78 background: hsla(0, 0%, 50%, 0.2);
79 border-color: #22c55e;
80}
81#drop-label {
82 opacity: 0.667;
83}
84#drop-zone.dragging #drop-label
85#drop-zone:hover #drop-label {
86 opacity: 1;
87}
88</style>
89
90
91<hr/>
92
93<details>
94 <summary>MAJOR CHEATING hint for part 2</summary>
95
96 So… we really want you to build your own car. But. Tools like `goat` and `PDSls` do have a "download repo" function, and also a "create record" function, 👀
97</details>