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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 >
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< span > Address:< / span >
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< input type = "text" id = "address" style = "width:200px" >
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< span > Amount:< / span >
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< input type = "text" id = "amount" style = "width:200px" >
< button onclick = "transact()" > Send< / button >
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< span id = "message" > < / span >
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< / 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":"Changed",
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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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";
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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;
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var contract = web3.eth.contract(address, desc);
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contract.Changed({from: eth.coinbase}).changed(function() {
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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+"< / td > < td > "+web3.toDecimal(storage[item])+"< / td > < / tr > ";
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}
}
function transact() {
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var to = document.querySelector("#address");
if( to.value.length == 0 ) {
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to = "0x4205b06c2cfa0e30359edcab94543266cb6fa1d3";
} else {
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if (to.value.substr(0,2) != "0x")
to.value = "0x"+to.value;
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}
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var value = document.querySelector("#amount");
var amount = parseInt( value.value );
console.log("transact: ", to.value, " => ", amount)
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contract.send( to.value, amount );
to.value = "";
value.value = "";
var message = document.querySelector("#message")
message.innerHTML = "Submitted";
setTimeout(function() {
message.innerHTML = "";
}, 1000);
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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;
}
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event Changed(address indexed from, uint indexed amount);
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function send(address to, uint value)
{
if( balances[msg.sender] < value ) return ;
balances[msg.sender] -= value;
balances[to] += value;
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Changed(msg.sender, value);
Changed(to, value);
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}
function balance(address who) constant returns(uint t)
{
t = balances[who];
}
mapping(address => uint256) balances;
}
-!>
