Skip to content

Instantly share code, notes, and snippets.

What would you like to do?
Contract.html for use with go-ethereum CLI JSON-RPC interface
<script type="text/javascript" src="bignumber.min.js"></script>
<script type="text/javascript" src="ethereum.js"></script>
<script type="text/javascript">
var web3 = require('web3');
web3.setProvider(new web3.providers.HttpSyncProvider('http://localhost:8080'));
// solidity source code
var source = "" +
"contract test {\n" +
" /// @notice Will multiply `a` by 7. \n" +
" function multiply(uint a) returns(uint d) {\n" +
" return a * 7;\n" +
" }\n" +
// contract description, this will be autogenerated somehow
var desc = [{
"name": "multiply(uint256)",
"type": "function",
"inputs": [
"name": "a",
"type": "uint256"
"outputs": [
"name": "d",
"type": "uint256"
var contract;
function createExampleContract() {
// hide create button
document.getElementById('create').style.visibility = 'hidden';
document.getElementById('source').innerText = source;
// create contract
var address = web3.eth.transact({data: "0x605180600c6000396000f3007c0100000000000000000000000000000000000000000000000000000000600035048063c6888fa114602d57005b60366004356040565b8060005260206000f35b6000600782029050604c565b91905056",gas:"50000",gasprice:"5000"});
contract = web3.eth.contract(address, desc);
document.getElementById('call').style.visibility = 'visible';
function callExampleContract() {
// this should be generated by ethereum
var param = parseInt(document.getElementById('value').value);
var res =;
document.getElementById('result').innerText = res.toString(10);
<div id="source"></div>
<div id='create'>
<button type="button" onClick="createExampleContract();">create example contract</button>
<div id='call' style='visibility: hidden;'>
<input type="number" id="value"></input>
<button type="button" onClick="callExampleContract()">Call Contract</button>
<div id="result"></div>
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.