webu
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IrChain JavaScript API, middleware to talk to a irchain node over RPC
79 lines (64 loc) • 2.62 kB
HTML
<html>
<head>
<script type="text/javascript" src="../dist/webu.js"></script>
<script type="text/javascript">
var Webu = require('webu');
var webu = new Webu();
webu.setProvider(new webu.providers.HttpProvider('http://localhost:8545'));
// solidity code code
var source = '' +
'pragma solidity ^0.4.6;' +
'contract test {\n' +
' function multiply(uint a) constant returns(uint d) {\n' +
' return a * 7;\n' +
' }\n' +
'}\n';
var compiled = webu.irc.compile.solidity(source);
var code = compiled.code;
// contract json abi, this is autogenerated using solc CLI
var abi = compiled.info.abiDefinition;
var myContract;
function createExampleContract() {
// hide create button
document.getElementById('create').style.visibility = 'hidden';
document.getElementById('code').innerText = code;
// let's assume that coinbase is our account
webu.irc.defaultAccount = webu.irc.coinbase;
// create contract
document.getElementById('status').innerText = 'transaction sent, waiting for confirmation';
webu.irc.contract(abi).new({data: code}, function(err, contract) {
if (err) {
console.error(err);
return;
// callback fires twice, we only want the second call when the contract is deployed
} else if (contract.address) {
myContract = contract;
console.log('address: ' + myContract.address);
document.getElementById('status').innerText = 'Mined!';
document.getElementById('call').style.visibility = 'visible';
}
});
}
function callExampleContract() {
// this should be generated by irchain
var param = parseInt(document.getElementById('value').value);
// call the contract
var res = myContract.multiply(param);
document.getElementById('result').innerText = res.toString(10);
}
</script>
</head>
<body>
<h1>contract</h1>
<div id="code"></div>
<div id="status"></div>
<div id='create'>
<button type="button" onClick="createExampleContract();">create example contract</button>
</div>
<div id='call' style='visibility: hidden;'>
<input type="number" id="value" onkeyup='callExampleContract()'></input>
</div>
<div id="result"></div>
</body>
</html>