1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
<!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>Address:</span>
<input type="text" id="address" style="width:200px">
<span>Amount:</span>
<input type="text" id="amount" style="width:200px">
<button onclick="transact()">Send</button>
<span id="message"></span>
</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":"Changed",
"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;
var contract = web3.eth.contract(address, desc);
contract.Changed({from: eth.coinbase}).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+"</td><td>"+web3.toDecimal(storage[item])+"</td></tr>";
}
}
function transact() {
var to = document.querySelector("#address");
if( to.value.length == 0 ) {
to = "0x4205b06c2cfa0e30359edcab94543266cb6fa1d3";
} else {
if (to.value.substr(0,2) != "0x")
to.value = "0x"+to.value;
}
var value = document.querySelector("#amount");
var amount = parseInt( value.value );
console.log("transact: ", to.value, " => ", amount)
contract.send( to.value, amount );
to.value = "";
value.value = "";
var message = document.querySelector("#message")
message.innerHTML = "Submitted";
setTimeout(function() {
message.innerHTML = "";
}, 1000);
}
refresh();
</script>
</html>
<!--
contract JevCoin {
function JevCoin()
{
balances[msg.sender] = 1000000;
}
event Changed(address indexed from, uint indexed amount);
function send(address to, uint value)
{
if( balances[msg.sender] < value ) return;
balances[msg.sender] -= value;
balances[to] += value;
Changed(msg.sender, value);
Changed(to, value);
}
function balance(address who) constant returns(uint t)
{
t = balances[who];
}
mapping(address => uint256) balances;
}
-!>
|
