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

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<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Bingo verify</title>
  <link rel="stylesheet" href="./lib/main.css">
  <link rel="stylesheet" href="./lib/bootstrap/css/bootstrap.min.css">
  <script src="./lib/GoogleAnalytics.js"></script>
  <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>
</head>

<body>

  <div id="app" class="main">
    <h1 class="text-center pb-5">Bingo verify</h1>
    <hr>
    <form class="py-5">
      <h2 class="text-center">Input</h2>
      <div class="form-group">
        <input :value="client_seed" @change="client_seed = $event.target.value" class="form-control"
          placeholder="Client Seed">
      </div>
      <div class="form-group">
        <input :value="server_seed" @change="server_seed = $event.target.value" class="form-control"
          placeholder="Server Seed">
      </div>
      <div class="form-group">
        <input :value="nonce" @change="nonce = $event.target.value" class="form-control" placeholder="Nonce">
      </div>
    </form>
    <hr>
    <form class="py-5">
      <h2 class="text-center pb-5">Output</h2>
      <div class="form-group">
        <label>sha256(server_seed)</label>
        <input class="form-control" readonly :value="sha256(server_seed)">
      </div>
      <div class="form-group">
        <label>hmac_sha256(client_seed:nonce, server_seed)</label>
        <input class="form-control" readonly :value="result_hash">
      </div>
    </form>
    <hr>
    <form class="py-5">
      <h2 class="text-center pb-5">Results</h2>
      <h5>Final Result Balls (Click each to process)</h5>
      <div class="table-responsive">
        <table class="table table-bordered table-hover">
          <tbody>
            <tr>
              <td v-for="(result, index) in results"
                  class="text-center"
                  style="min-width: 50px; cursor: pointer;"
                  :class="{'bg-primary text-white': resultIndex === index}"
                  @click="resultIndex = index">
                {{result}}
              </td>
            </tr>
          </tbody>
        </table>
      </div>
      <h5 style="margin-top: 20px;">{{ordinalNumber(resultIndex + 1)}} Ball Generate Process</h5>
      <p>Using the formula `hmac_sha256(client_seed:nonce, server_seed)`,</p>
      <p>We get the hash result:</p>
      <p>`{{result_hash}}`.</p>
      <br>
      <ol>
        <li>Take the first 15 characters, resulting in `{{baseHash}}`.</li>
        <li>Convert this to decimal, which gives: `{{BigInt('0x' + baseHash)}}`.</li>
        <li>Perform modulus 47(47 is fixed constant), and we get a remainder of {{index}}.</li>
        <li>Starting from the index, take 14 characters, resulting in <span class="text-danger">`{{newHash}}`</span>.</li>
        <li>Convert this to decimal, resulting in: `{{BigInt('0x' + newHash)}}`.</li>
        <li>Divide by 8(8 is a fixed constant), resulting in: `{{BigInt('0x' + newHash) / BigInt(8)}}`.</li>
        <li>Multiply by 2^-53(2^-53 is a fixed constant), resulting in: `{{Number(BigInt('0x' + newHash) / BigInt(8)) * Math.pow(2, -53)}}`.</li>
        <li>Finally, Multiply by {{lastedOriginalCards[resultIndex].originalCards.length}}(51 balls - {{resultIndex}} generated), resulting in: `{{Number(BigInt('0x' + newHash) /
          BigInt(8)) * Math.pow(2, -53) * lastedOriginalCards[resultIndex].originalCards.length}}`.</li>
      </ol>
      <p>The lasted ball num is: <span style="color: purple;">{{results[resultIndex]}}</span></p>
      <div class="table-responsive">
        <table class="table table-bordered table-hover">
          <tbody>
            <tr>
              <td v-for="(card, index) in lastedOriginalCards[resultIndex].originalCards"
                  :key="index"
                  class="text-center"
                  style="min-width: 50px;"
                  :class="{'bg-success text-white': lastedOriginalCards[resultIndex].selectCardIndex === index}">
                {{card}}
              </td>
            </tr>
          </tbody>
        </table>
      </div>
    </form>
  </div>
  </form>
  </div>
</body>
<script>
  let qs = tools.queryString();
  const ballNum = 20;
  var app = new Vue({
    el: '#app',
    data: {
      /** inputs */
      client_seed: qs.c || '',
      server_seed: qs.s || '',
      nonce: parseInt(qs.n) || 0,
      resultIndex: 0,
      lastedOriginalCards: [],
    },
    computed: {
      result_hash() {
        return this.hmac_sha256(this.client_seed + ':' + this.nonce, this.server_seed + ':' + this.resultIndex);
      },
      result_hash_list() {
        return String(this.result_hash)
      },
      baseHash() {
        return this.result_hash_list.substring(0, 15)
      },
      index() {
        return Number(BigInt('0x' + this.result_hash_list.substring(0, 15)) % BigInt(47))
      },
      newHash() {
        return this.result_hash_list.substring(this.index, this.index + 14)
      },
      results() {
        const ORIGINAL_CARDS = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51];
        const cards = [];
        let totalCardNum = ORIGINAL_CARDS.length;
        for (let i = 0; i < ballNum; i++) {
          const hash = String(this.hmac_sha256(this.client_seed + ':' + this.nonce, this.server_seed + ':' + i));
          const selectCardIndex = parseInt(slideWindowNumber(hash, totalCardNum--));
          this.lastedOriginalCards[i] = {
            originalCards: JSON.parse(JSON.stringify(ORIGINAL_CARDS)),
            selectCardIndex: selectCardIndex,
          };
          cards.push(ORIGINAL_CARDS[selectCardIndex]);
          ORIGINAL_CARDS.splice(selectCardIndex, 1);
        }

        return cards;
      },
    },
    created() {
      console.log(this.result_hash_list)
    },
    methods: {
      hmac_sha256(msg, salt) {
        return CryptoJS.HmacSHA256(msg, salt);
      },
      sha512(value) {
        return CryptoJS.SHA512(CryptoJS.enc.Utf8.parse(value));
      },
      sha256(value) {
        return CryptoJS.SHA256(CryptoJS.enc.Utf8.parse(value));
      },
      parseInt(value) {
        return window.parseInt(value, 16);
      },
      ordinalNumber(n) {
        const s = ['th', 'st', 'nd', 'rd'];
        const v = n % 100;
        return n + (s[(v - 20) % 10] || s[v] || s[0]);
      }
    }
  });
</script>

</html>