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# Ethereum JavaScript API
This is the Ethereum compatible [JavaScript API](https://github.com/ethereum/wiki/wiki/JavaScript-API)
which implements the [Generic JSON RPC](https://github.com/ethereum/wiki/wiki/Generic-JSON-RPC) spec. It's available on npm as a node module and also for bower and component as an embeddable js
[![NPM version][npm-image]][npm-url] [![Build Status][travis-image]][travis-url] [![dependency status][dep-image]][dep-url] [![dev dependency status][dep-dev-image]][dep-dev-url]
<!-- [](https://ci.testling.com/ethereum/ethereum.js) -->
## Installation
### Node.js
npm install ethereum.js
### For browser
Bower
bower install ethereum.js
Component
component install ethereum/ethereum.js
* Include `ethereum.min.js` in your html file.
* Include [bignumber.js](https://github.com/MikeMcl/bignumber.js/)
## Usage
Require the library:
var web3 = require('web3');
Set a provider (QtProvider, WebSocketProvider, HttpRpcProvider)
var web3.setProvider(new web3.providers.WebSocketProvider('ws://localhost:40404/eth'));
There you go, now you can use it:
```
var coinbase = web3.eth.coinbase;
var balance = web3.eth.balanceAt(coinbase);
```
For another example see `example/index.html`.
## Contribute!
### Requirements
* Node.js
* npm
* gulp (build)
* mocha (tests)
```bash
sudo apt-get update
sudo apt-get install nodejs
sudo apt-get install npm
sudo apt-get install nodejs-legacy
```
### Building (gulp)
```bash
npm run-script build
```
### Testing (mocha)
```bash
npm test
```
**Please note this repo is in it's early stage.**
If you'd like to run a WebSocket ethereum node check out
[go-ethereum](https://github.com/ethereum/go-ethereum).
To install ethereum and spawn a node:
```
go get github.com/ethereum/go-ethereum/ethereum
ethereum -ws -loglevel=4
```
[npm-image]: https://badge.fury.io/js/ethereum.js.png
[npm-url]: https://npmjs.org/package/ethereum.js
[travis-image]: https://travis-ci.org/ethereum/ethereum.js.svg
[travis-url]: https://travis-ci.org/ethereum/ethereum.js
[dep-image]: https://david-dm.org/ethereum/ethereum.js.svg
[dep-url]: https://david-dm.org/ethereum/ethereum.js
[dep-dev-image]: https://david-dm.org/ethereum/ethereum.js/dev-status.svg
[dep-dev-url]: https://david-dm.org/ethereum/ethereum.js#info=devDependencies
|
