@hyperdapp/web4 v0.20.7

Hyperdapp & Theos JavaScript API

This is the Ethereum compatible JavaScript API which implements the Generic JSON RPC spec. It's available on npm as a node module, for Bower and component as embeddable scripts, and as a meteor.js package.

You need to run a local Ethereum node to use this library.

Documentation

Table of Contents

• Installation
  • Node.js
  • Yarn
  • Meteor.js
  • As a Browser module
• Usage
  • Migration from 0.13.0 to 0.14.0
• Contribute!
  • Requirements
  • Building (gulp)
  • Testing (mocha)
  • Community
  • Other implementations
• License

Installation

Node.js

npm install web4

Yarn

yarn add web4

Meteor.js

meteor add hyperdapp:web4

As a Browser module

CDN

<script src="https://cdn.jsdelivr.net/gh/hyperdapp/web4.js@1.0.0-beta.36/dist/web4.min.js" integrity="sha256-nWBTbvxhJgjslRyuAKJHK+XcZPlCnmIAAMixz6EefVk=" crossorigin="anonymous"></script>

Bower

bower install web4

Component

component install hyperdapp/web4.js

• Include web4.min.js in your html file. (not required for the meteor package)

Usage

Use the web4 object directly from the global namespace:

console.log(web4); // {eth: .., shh: ...} // It's here!

Set a provider (HttpProvider):

if (typeof web4 !== 'undefined') {
  web4 = new web4(web4.currentProvider);
} else {
  // Set the provider you want from web4.providers
  web4 = new web4(new web4.providers.HttpProvider("http://localhost:8545"));
}

Set a provider (HttpProvider using HTTP Basic Authentication):

web4.setProvider(new web4.providers.HttpProvider('http://' + BasicAuthUsername + ':' + BasicAuthPassword + '@localhost:8545'));

There you go, now you can use it:

var coinbase = web4.eth.coinbase;
var balance = web4.eth.getBalance(coinbase);

You can find more examples in the example directory.

Migration from 0.13.0 to 0.14.0

web4.js version 0.14.0 supports multiple instances of the web4 object. To migrate to this version, please follow the guide:

-var web4 = require('web4');
+var web4 = require('web4');
+var web4 = new web4();

Contribute!

Requirements

• Node.js
• npm

# On Linux:
sudo apt-get update
sudo apt-get install nodejs
sudo apt-get install npm
sudo apt-get install nodejs-legacy

Building (gulp)

npm run-script build

Testing (mocha)

npm test

Community

• Gitter
• Forum

Other upcoming implementations

• Python web4.py

License

MIT © 2018 Contributors

LGPL-3.0+ © 2015 Contributors For any omissions, please contact us at info@hyperdapp.org