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plinko.html
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plinko.html
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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>Plinko 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>
</head>
<body>
<div id="app" class="main">
<h1 class="text-center pb-5">Plinko 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>
<!-- difference -->
<div class="form-group">
<label>hmac_sha512(client_seed:nonce, server_seed)</label>
<input class="form-control" readonly :value="result_hash">
</div>
<!-- difference -->
<hr>
<h5>Convert each set of four bytes into a number</h3>
<div class="form-group" style="overflow-x: auto;">
<table style="width: 1200px;" class="table table-sm table-bordered">
<thead>
<tr>
<th>#</th>
<td v-for="(hex, index) in result_hash_list" :key="index">{{ index }}</td>
</tr>
</thead>
<tbody>
<tr>
<th>Hex</th>
<td v-for="(hex, index) in result_hash_list" :key="index">{{ hex }}</td>
</tr>
<tr>
<th>Base 10</th>
<td v-for="(hex, index) in result_hash_list" :key="index">{{ parseInt(hex) }}</td>
</tr>
</tbody>
</table>
</div>
<hr>
<h5>Each set of 4 bytes is turned into a number in the range [0, 1). Only the first calculation is displayed for conciceness.</h5>
<div>({{ parseInt(result_hash_list[0]) }}/256^1) + ({{ parseInt(result_hash_list[1]) }}/256^2) + ({{ parseInt(result_hash_list[2]) }}/256^3) + ({{ parseInt(result_hash_list[3]) }}/256^4)</div>
<div style="white-space: nowrap;">= ({{ parseInt(result_hash_list[0])/(256) }}) + ({{ parseInt(result_hash_list[1])/(256*256) }}) + ({{ parseInt(result_hash_list[2])/(256*256*256) }}) + ({{ parseInt(result_hash_list[0])/(256*256*256*256) }})</div>
<div>= ({{ parseInt(result_hash_list[0])/(256) + parseInt(result_hash_list[1])/(256*256) + parseInt(result_hash_list[2])/(256*256*256) + parseInt(result_hash_list[3])/(256*256*256*256) }})</div>
</form>
<form class="py-5">
<h2 class="text-center pb-5">Results</h2>
<div class="form-group">
<table class="table table-sm table-bordered">
<thead>
<tr>
<th>Pin #</th>
<th>Number</th>
<th>Number*2</th>
<th>Direction</th>
</tr>
</thead>
<tbody>
<tr v-for="(num, index) in results">
<td>{{ index+1 }}</td>
<td>{{ num }}</td>
<td>{{ num*2 }}</td>
<td>{{ num>.5?'Right':'Left' }}</td>
</tr>
</tbody>
</table>
</div>
</form>
</div>
<script>
let qs = tools.queryString();
var app = new Vue({
el: '#app',
data: {
/** inputs */
client_seed: qs.c || '',
server_seed: qs.s || '',
server_seed_hash: qs.h || '',
nonce: parseInt(qs.n) || 0,
},
computed: {
result_hash () {
return this.hmac_sha512(this.client_seed + ":" + this.nonce, this.server_seed);
},
result_hash_list () {
return String(this.result_hash).match(/.{2}/g);
},
results () {
let res = [];
let hexArr = this.result_hash_list;
for (let i=0, l=hexArr.length; i<l; i+=4) {
let num = this.parseInt(hexArr[i])/Math.pow(256, 1) + this.parseInt(hexArr[i+1])/Math.pow(256,2) + this.parseInt(hexArr[i+2])/Math.pow(256,3) + this.parseInt(hexArr[i+3])/Math.pow(256,4)
res.push(num);
}
return res;
}
},
watch: {
'this.results'() {
ga('send', 'event', 'Plinko', 'verify', this.server_seed, {metric0: this.client_seed, metric1: this.nonce})
}
},
methods: {
round (index) {
return this.client_seed + ':' + this.nonce + ':' + index;
},
sha256 (value) {
return CryptoJS.SHA256(CryptoJS.enc.Utf8.parse(value));
},
sha512 (value) {
return CryptoJS.SHA512(CryptoJS.enc.Utf8.parse(value));
},
hmac_sha512 (msg, salt) {
return CryptoJS.HmacSHA512(msg, salt);
},
parseInt (value) {
return window.parseInt(value, 16);
}
}
});
</script>
</body>
</html>