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<!doctype>
<html>
<title>JevCoin</title>
<head>
<script type="text/javascript" src="../ext/bignumber.min.js"></script>
<script type="text/javascript" src="../ext/ethereum.js/dist/ethereum.js"></script>
</head>
<body>
<h1>JevCoin <code id="contract_addr"></code></h1>
<div>
<strong>Balance</strong>
<span id="balance"></strong>
</div>
<div>
<span class="amount">Amount:</span>
<input type="text" id="address" style="width:200px">
<input type="text" id="amount" style="width:200px">
<button onclick="transact()">Send</button>
</div>
<hr>
<table width="100%" id="table">
<tr><td style="width:40%;">Address</td><td>Balance</td></tr>
<tbody id="table_body"></tbody>
</table>
</body>
<script type="text/javascript">
var web3 = require('web3');
var eth = web3.eth;
web3.setProvider(new web3.providers.HttpSyncProvider('http://localhost:8545'));
var desc = [{
"name": "balance(address)",
"type": "function",
"inputs": [{
"name": "who",
"type": "address"
}],
"constant": true,
"outputs": [{
"name": "value",
"type": "uint256"
}]
}, {
"name": "send(address,uint256)",
"type": "function",
"inputs": [{
"name": "to",
"type": "address"
}, {
"name": "value",
"type": "uint256"
}],
"outputs": []
}, {
"name":"received",
"type":"event",
"inputs": [
{"name":"from","type":"address","indexed":true},
{"name":"amount","type":"uint256","indexed":true},
],
}];
var address = localStorage.getItem("address");
// deploy if not exist
if (address == null) {
var code = "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";
address = web3.eth.transact({data: code});
localStorage.setItem("address", address);
}
document.querySelector("#contract_addr").innerHTML = address.toUpperCase();
var contract = web3.eth.contract(address, desc);
contract.received({from: eth.coinbase}).changed(function() {
refresh();
});
eth.watch('chain').changed(function() {
refresh();
});
function refresh() {
document.querySelector("#balance").innerHTML = contract.balance(eth.coinbase);
var table = document.querySelector("#table_body");
table.innerHTML = ""; // clear
var storage = eth.storageAt(address);
table.innerHTML = "";
for( var item in storage ) {
table.innerHTML += "<tr><td>"+item.toUpperCase()+"</td><td>"+web3.toDecimal(storage[item])+"</td></tr>";
}
}
function transact() {
var to = document.querySelector("#address").value;
if( to.length == 0 ) {
to = "0x4205b06c2cfa0e30359edcab94543266cb6fa1d3";
} else {
to = "0x"+to;
}
var value = parseInt( document.querySelector("#amount").value );
contract.send( to, value );
}
refresh();
</script>
</html>
<!--
contract JevCoin {
function JevCoin()
{
balances[msg.sender] = 1000000;
}
event changed(address indexed from, address indexed to);
function send(address to, uint value)
{
if( balances[msg.sender] < value ) return;
balances[msg.sender] -= value;
balances[to] += value;
changed(msg.sender, to);
}
function balance(address who) constant returns(uint t)
{
t = balances[who];
}
mapping(address => uint256) balances;
}
-!>
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