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indexWithEvent.html
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indexWithEvent.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>Document</title>
<link rel="stylesheet" type="text/css" href="main.css">
<script src="./node_modules/web3/dist/web3.min.js"></script>
</head>
<body>
<div class="container">
<h1>Info Contract</h1>
<h2 id="info"></h2>
<img id="loader" src="https://loading.io/spinners/double-ring/lg.double-ring-spinner.gif">
<label for="name" class="col-lg-2 control-label">Name</label>
<input id="name" type="text">
<label for="name" class="col-lg-2 control-label">Age</label>
<input id="age" type="text">
<button id="button">Update Info</button>
</div>
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"></script>
<script>
if (typeof web3 !== 'undefined') {
web3 = new Web3(web3.currentProvider);
} else {
// set the provider you want from Web3.providers
web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:7545"));
}
web3.eth.defaultAccount = web3.eth.accounts[0];
var infoContract = web3.eth.contract([
{
"anonymous": false,
"inputs": [
{
"indexed": false,
"name": "name",
"type": "string"
},
{
"indexed": false,
"name": "age",
"type": "uint256"
}
],
"name": "Instructor",
"type": "event"
},
{
"constant": false,
"inputs": [
{
"name": "_fName",
"type": "string"
},
{
"name": "_age",
"type": "uint256"
}
],
"name": "setInfo",
"outputs": [],
"payable": false,
"stateMutability": "nonpayable",
"type": "function"
},
{
"constant": true,
"inputs": [],
"name": "getInfo",
"outputs": [
{
"name": "",
"type": "string"
},
{
"name": "",
"type": "uint256"
}
],
"payable": false,
"stateMutability": "view",
"type": "function"
}
]);
var info = infoContract.at('0x345ca3e014aaf5dca488057592ee47305d9b3e10');
var instructorEvent = info.Instructor();
instructorEvent.watch(function(error, result){
if (!error)
{
$("#loader").hide();
$("#info").html(result.args.name + ' (' + result.args.age + ' years old)');
} else {
$("#loader").hide();
console.log(error);
}
});
$("#button").click(function() {
$("#loader").show();
info.setInfo($("#name").val(), $("#age").val());
});
</script>
</body>
</html>