example contract using array, fixed #185

web3 · Jul 1, 2015 · d5d2115 · d5d2115
1 parent 21ed235
commit d5d2115
Showing 1 changed file with 83 additions and 0 deletions.
diff --git a/example/contract_array.html b/example/contract_array.html
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+<!doctype>
+<html>
+
+<head>
+<script type="text/javascript" src="../dist/web3.js"></script>
+<script type="text/javascript">
+
+ var web3 = require('web3');
+ web3.setProvider(new web3.providers.HttpProvider("http://localhost:8545"));
+
+ // solidity code code
+ var source = "" +
+ "contract test {\n" +
+ " function take(uint[] a, uint b) constant returns(uint d) {\n" +
+ " return a[b];\n" +
+ " }\n" +
+ "}\n";
+
+ var compiled = web3.eth.compile.solidity(source);
+ var code = compiled.test.code;
+ // contract json abi, this is autogenerated using solc CLI
+ var abi = compiled.test.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
+ web3.eth.defaultAccount = web3.eth.coinbase;
+
+ var watch = web3.eth.filter('latest');
+
+ // create contract
+ myContract = web3.eth.contract(abi).new({data: code});
+ console.log('address: ' + myContract.address);
+ document.getElementById('status').innerText = "transaction sent, waiting for confirmation";
+ watch.watch(function (err, hash) {
+ var block = web3.eth.getBlock(hash, true); 
+ var contractMined = block.transactions.reduce(function (mined, th) {
+ // TODO: compiled code do not have 0x prefix
+ return mined || (th.from === web3.eth.defaultAccount && th.input.indexOf(code) !== -1);
+ }, false);
+
+ if (contractMined) {
+ document.getElementById('status').innerText = 'Mined!';
+ document.getElementById('call').style.visibility = 'visible';
+ }
+ });
+
+ }
+
+ function callExampleContract() {
+ // this should be generated by ethereum
+ var param = parseInt(document.getElementById('value').value);
+
+ // call the contract
+ var res = myContract.take([0,6,5,2,1,5,6], 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;'>
+ <div>var array = [0,6,5,2,1,5,6];</div>
+ <div>var x = array[
+ <input type="number" id="value" onkeyup='callExampleContract()'></input>
+ ];
+ </div>
+ </div>
+ <div id="result"></div>
+</body>
+</html>
+