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first-contract.html
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first-contract.html
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<html>
<head>
<link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/milligram/1.2.3/milligram.min.css">
</head>
<body class="container" style="padding-top: 3%;">
<h2><a href="index.html">ethjs</a></h2>
<h4>SimpleStore Contract</h4>
<hr />
<div class="row">
<div class="column column-60">
<label>Set Value</label>
<input id="valueAmount" type="number" placeholder="i.e. 4500" />
<button id="setValue">Set Value</button>
<button id="getValue">Get Value</button>
<br /><br />
<div id="response" style="padding: 20px; border: 1px solid #9b4dca; word-wrap: break-word">
Deploying your contract...
</div>
</div>
<div class="column column-40">
<label>Bytecode</label>
<input id="bytecode" type="text" value="" />
<label>ABI</label>
<textarea id="abi"></textarea>
</div>
</div>
<br /><br />
<label>Solidity Code</label>
<pre><code>
contract SimpleStore {
function set(uint _value) {
value = _value;
}
function get() constant returns (uint) {
return value;
}
uint value;
}
</code></pre>
<script type="text/javascript" src="ethereumjs-testrpc.js"></script>
<script type="text/javascript" src="ethjs.js"></script>
<script type="text/javascript">
var eth = new Eth(TestRPC.provider());
var el = function(id){ return document.querySelector(id); };
/*
// uncomment to enable MetaMask support:
if (typeof window.web3 !== 'undefined' && typeof window.web3.currentProvider !== 'undefined') {
eth.setProvider(window.web3.currentProvider);
} else {
eth.setProvider(provider); // set to TestRPC if not available
}
*/
eth.accounts().then(function(accounts) {
var SimpleStoreBytecode = '606060405234610000575b6090806100176000396000f360606040526000357c01000000000000000000000000000000000000000000000000000000009004806360fe47b11460405780636d4ce63c14605a575b6000565b3460005760586004808035906020019091905050607a565b005b3460005760646085565b6040518082815260200191505060405180910390f35b806000819055505b50565b600060005490505b9056';
var SimpleStoreABI = [{"constant":false,"inputs":[{"name":"_value","type":"uint256"}],"name":"set","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"get","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"}];
var SimpleStore = eth.contract(SimpleStoreABI, SimpleStoreBytecode, { from: accounts[0], gas: 300000 });
var simpleStoreInstance;
el('#bytecode').value = SimpleStoreBytecode;
el('#abi').value = JSON.stringify(SimpleStoreABI);
SimpleStore.new({}).then(function(txHash){
var checkTransaction = setInterval(function(){
eth.getTransactionReceipt(txHash).then(function(receipt){
if (receipt) {
clearInterval(checkTransaction);
simpleStoreInstance = SimpleStore.at(receipt.contractAddress);
el('#response').innerHTML = 'Contract deployed to address: ' + String(receipt.contractAddress);
el('#setValue').addEventListener('click', function(){
simpleStoreInstance.set(el('#valueAmount').value)
.then(function(setTxHash){
el('#response').innerHTML = 'Setting value... Your transaction hash is: ' + String(setTxHash);
});
});
el('#getValue').addEventListener('click', function(){
simpleStoreInstance.get().then(function(valueStored){
el('#response').innerHTML = 'The value stored in the contract is: ' + valueStored[0].toString(10);
});
});
}
});
}, 400);
})
.catch(function(error){
el('#response').innerHTML = 'There was an error: ' + String(error);
});
});
</script>
</body>
</html>