verify/bullet.html at main · bcgame-project/verify · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8"/>
  <meta http-equiv="X-UA-Compatible" content="IE=edge"/>
  <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
  <title>Bullet verify (simple)</title>
  <link rel="stylesheet" href="./lib/main.css"/>
  <link rel="stylesheet" href="./lib/bootstrap/css/bootstrap.min.css"/>
  <script src="./lib/vue.min.js"></script>
  <script src="./lib/crypto-js.js"></script>
  <script src="./lib/tools.js"></script>
  <script src="./lib/utils.js"></script>
  <style>
    body { font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif; }
    .main { max-width: 760px; margin: 24px auto; }
    .muted { color: #6c757d; }
  </style>
</head>
<body>
<div id="app" class="main">
  <h1 class="text-center pb-3">Bullet verify</h1>
  <p class="text-center muted">Outputs the random number and the 6-slot sequence.</p>
  <hr/>

  <!-- Inputs -->
  <form class="py-3">
    <h2 class="text-center">Input</h2>
    <div class="form-group">
      <input class="form-control" placeholder="Server Seed"
             :value="server_seed" @input="server_seed = $event.target.value"/>
    </div>
    <div class="form-group">
      <input class="form-control" placeholder="Client Seed"
             :value="client_seed" @input="client_seed = $event.target.value"/>
    </div>
    <div class="form-group">
      <input class="form-control" placeholder="Nonce"
             :value="nonce" @input="nonce = normalizeInt($event.target.value, 0)"/>
    </div>
  </form>

  <hr/>

  <!-- Outputs -->
  <form class="py-3">
    <h2 class="text-center">Output</h2>

    <div class="form-group">
      <label>Random number (spinChamber [1..6])</label>
      <input class="form-control" readonly :value="spinChamberDisplay"/>
    </div>

    <div class="form-group">
      <label>Sequence (6 slots starting from spinChamber)</label>
      <input class="form-control" readonly :value="sequenceDisplay"/>
    </div>
  </form>

  <hr/>

  <!-- Explanation -->
  <section class="py-3">
    <h2 class="text-center">Fair Verification Result Explanation</h2>
    <div class="mt-2">
      <p>
       Numbers 1–6 represent the revolver’s chambers. Chamber 1 always has a bullet, while chambers 2 and 3 may also have bullets depending on difficulty.
      </p>
      <p>
        The result only sets the first chamber; shots then follow in order (e.g., if the first is 5, then 6→1→2→3→4). In this example, the third shot will definitely hit.
      </p>
    </div>
  </section>
</div>

<script>
  const qs = tools.queryString();

  new Vue({
    el: '#app',
    data: {
      server_seed: qs.s || '',
      client_seed: qs.c || '',
      nonce: Number.isFinite(parseInt(qs.n)) ? parseInt(qs.n) : 0,
    },
    computed: {
      hmacHex() {
        if (!this.server_seed || !this.client_seed) return '';
        return CryptoJS.HmacSHA256(`${this.client_seed}:${this.nonce}`, this.server_seed).toString();
      },
      // spinChamber = slideWindowNumber(hmac, 6) + 1 → [1..6]
      spinChamber() {
        if (!this.hmacHex) return null;
        // slideWindowNumber(hash, 6) is expected from ./lib/utils.js
        const v = Math.floor(slideWindowNumber(this.hmacHex, 6)) + 1;
        return v;
      },
      spinChamberDisplay() {
        return this.spinChamber == null ? '-' : String(this.spinChamber);
      },
      // e.g. spinChamber=2 → [2,3,4,5,6,1]
      sequence() {
        if (this.spinChamber == null) return [];
        const arr = [];
        for (let i = 0; i < 6; i++) {
          const x = ((this.spinChamber - 1 + i) % 6) + 1;
          arr.push(x);
        }
        return arr;
      },
      sequenceDisplay() {
        return this.sequence.length ? `[${this.sequence.join(',')}]` : '-';
      }
    },
    methods: {
      normalizeInt(v, def) {
        const n = parseInt(v, 10);
        return Number.isFinite(n) ? n : def;
      }
    }
  });
</script>
</body>
</html>