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<!doctype>
< html >
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< title > JevCoin< / title >
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< 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 >
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< h1 > JevCoin < code id = "contract_addr" > < / code > < / h1 >
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< 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 >
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< hr >
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< table width = "100%" id = "table" >
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< tr > < td style = "width:40%;" > Address< / td > < td > Balance< / td > < / tr >
< tbody id = "table_body" > < / tbody >
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< / table >
< / body >
< script type = "text/javascript" >
var web3 = require('web3');
var eth = web3.eth;
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web3.setProvider(new web3.providers.HttpSyncProvider('http://localhost:8545'));
var desc = [{
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"name": "balance(address)",
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"type": "function",
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"inputs": [{
"name": "who",
"type": "address"
}],
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"constant": true,
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"outputs": [{
"name": "value",
"type": "uint256"
}]
}, {
"name": "send(address,uint256)",
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"type": "function",
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"inputs": [{
"name": "to",
"type": "address"
}, {
"name": "value",
"type": "uint256"
}],
"outputs": []
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}, {
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"name":"received",
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"type":"event",
"inputs": [
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{"name":"from","type":"address","indexed":true},
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{"name":"amount","type":"uint256","indexed":true},
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],
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}];
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var address = localStorage.getItem("address");
// deploy if not exist
if (address == null) {
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var code = "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";
address = web3.eth.transact({data: code});
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localStorage.setItem("address", address);
}
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document.querySelector("#contract_addr").innerHTML = address.toUpperCase();
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var contract = web3.eth.contract(address, desc);
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contract.received({from: eth.coinbase}).changed(function() {
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refresh();
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});
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eth.watch('chain').changed(function() {
refresh();
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});
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function refresh() {
document.querySelector("#balance").innerHTML = contract.balance(eth.coinbase);
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var table = document.querySelector("#table_body");
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table.innerHTML = ""; // clear
var storage = eth.storageAt(address);
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table.innerHTML = "";
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for( var item in storage ) {
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table.innerHTML += "< tr > < td > "+item.toUpperCase()+"< / td > < td > "+web3.toDecimal(storage[item])+"< / td > < / tr > ";
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}
}
function transact() {
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var to = document.querySelector("#address").value;
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if( to.length == 0 ) {
to = "0x4205b06c2cfa0e30359edcab94543266cb6fa1d3";
} else {
to = "0x"+to;
}
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var value = parseInt( document.querySelector("#amount").value );
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contract.send( to, value );
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}
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refresh();
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< / script >
< / html >
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<!--
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;
}
-!>
