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index.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>Simple Counter</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
<body>
<div>
<p id="counter-value"></p>
<button id="increment">Increament</button>
<button id="decrement">Decreament</button>
<button id="reset">Reset</button>
</div>
<script src='https://code.jquery.com/jquery-3.2.1.slim.js' crossorigin="anonymous" ></script>
<script src = './web3.min.js'></script>
<script>
var contract;
$(document).ready(function() {
initContract();
getValue();
})
function initContract() {
web3 = new Web3(web3.currentProvider);
var address = "0x135b625cf552c622dbb264997ceb65d28d5f85c2";
var abi = [
{
"constant": false,
"inputs": [],
"name": "decreament",
"outputs": [],
"payable": false,
"stateMutability": "nonpayable",
"type": "function"
},
{
"constant": false,
"inputs": [],
"name": "increament",
"outputs": [],
"payable": false,
"stateMutability": "nonpayable",
"type": "function"
},
{
"constant": false,
"inputs": [],
"name": "reset",
"outputs": [],
"payable": false,
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [],
"payable": false,
"stateMutability": "nonpayable",
"type": "constructor"
},
{
"constant": true,
"inputs": [],
"name": "getCounter",
"outputs": [
{
"name": "",
"type": "int256"
}
],
"payable": false,
"stateMutability": "view",
"type": "function"
}
];
contract = new web3.eth.Contract(abi, address);
}
function getValue() {
// .call() specifies that it just allows to read the state of method
contract.methods.getCounter().call().then(result=>{
$('#counter-value').html(result);
})
}
$('#increment').click(function() {
web3.eth.getAccounts().then(function(accounts){
var acct = accounts[0];
// .send() who are we sending it from
return contract.methods.increament().send({from:acct});
})
.then(function(tx){
console.log("111111111111111111111",tx);
var curr = parseInt($('#counter-value').html());
$('counter-value').html(curr+1);
})
.catch(function(err){
console.log("2222222222222222",err);
})
})
$('#decrement').click(function(){
web3.eth.getAccounts().then(function(accounts){
var acct = accounts[0];
return contract.methods.decreament().send({from:acct});
})
.then(function(tx){
console.log("111111111111111111111",tx);
var curr = parseInt($('#counter-value').html());
$('counter-value').html(curr-1);
})
.catch(function(err){
console.log("2222222222222222",err);
})
})
$('#reset').click(function() {
web3.eth.getAccounts().then(function(accounts){
var acct = accounts[0];
// .send() who are we sending it from
return contract.methods.reset().send({from:acct});
})
.then(function(tx){
console.log("111111111111111111111",tx);
var curr = parseInt($('#counter-value').html());
$('counter-value').html(0);
})
.catch(function(err){
console.log("2222222222222222",err);
})
})
</script>
</body>
</html>