102 lines
2.5 KiB
Markdown
102 lines
2.5 KiB
Markdown
# Ethereum JavaScript API
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This is the Ethereum compatible JavaScript API using `Promise`s
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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
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[![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]
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<!-- [](https://ci.testling.com/ethereum/ethereum.js) -->
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## Installation
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### Node.js
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npm install ethereum.js
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### For browser
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Bower
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bower install ethereum.js
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Component
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component install ethereum/ethereum.js
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* Include `ethereum.min.js` in your html file.
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* Include [es6-promise](https://github.com/jakearchibald/es6-promise) or another ES6-Shim if your browser doesn't support ECMAScript 6.
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## Usage
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Require the library:
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var web3 = require('web3');
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Set a provider (QtProvider, WebSocketProvider, HttpRpcProvider)
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var web3.setProvider(new web3.providers.WebSocketProvider('ws://localhost:40404/eth'));
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There you go, now you can use it:
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```
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web3.eth.coinbase.then(function(result){
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console.log(result);
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return web3.eth.balanceAt(result);
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}).then(function(balance){
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console.log(web3.toDecimal(balance));
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}).catch(function(err){
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console.log(err);
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});
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```
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For another example see `example/index.html`.
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## Contribute!
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### Requirements
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* Node.js
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* npm
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* gulp (build)
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* mocha (tests)
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```bash
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sudo apt-get update
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sudo apt-get install nodejs
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sudo apt-get install npm
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sudo apt-get install nodejs-legacy
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```
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### Building (gulp)
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```bash
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npm run-script build
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```
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### Testing (mocha)
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```bash
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npm test
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```
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**Please note this repo is in it's early stage.**
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If you'd like to run a WebSocket ethereum node check out
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[go-ethereum](https://github.com/ethereum/go-ethereum).
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To install ethereum and spawn a node:
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```
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go get github.com/ethereum/go-ethereum/ethereum
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ethereum -ws -loglevel=4
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```
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[npm-image]: https://badge.fury.io/js/ethereum.js.png
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[npm-url]: https://npmjs.org/package/ethereum.js
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[travis-image]: https://travis-ci.org/ethereum/ethereum.js.svg
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[travis-url]: https://travis-ci.org/ethereum/ethereum.js
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[dep-image]: https://david-dm.org/ethereum/ethereum.js.svg
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[dep-url]: https://david-dm.org/ethereum/ethereum.js
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[dep-dev-image]: https://david-dm.org/ethereum/ethereum.js/dev-status.svg
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[dep-dev-url]: https://david-dm.org/ethereum/ethereum.js#info=devDependencies
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