xwallet

Lux Wallet is an open-source browser extension for the defi ecosystem, providing users with a better-to-use and more secure multi-chain experience.

Install

You can download the latest Lux Wallet here.

Guideline for Integrating Lux Wallet

To help dapp developers support and integrate Lux Wallet more easily, we recommend using our integration solution that has almost NO development cost and does not introduce any uncertainty:

Problem

When a dapp connects to an extension wallet, it usually works in this way:

1. The extension wallet will integrate an "Ethereum" object into the dapp page while it's loading.
2. The dapp will look for this "Ethereum" object to determine if an extension wallet is installed.
3. If the "Ethereum" object is detected, all following interactions between the dapp and the extension wallet are realized by this "Ethereum" object.
4. If the "Ethereum" object is not detected, the dapp will ask users to download a new extension wallet.

The problem is that many dapps will wrongly display this detected "Ethereum" object as "MetaMask" and display a "connect to MetaMask" button by default, which brings a lot of confusion to the users since any Web3 wallet can inject this "Ethereum" object.

Solution

We recommend solving the above problem with simple modifications as follows:

1. On your connection page, display both connection buttons for "MetaMask" and "Lux Wallet" when the "Ethereum" object is detected. These two buttons basically have the same function. Users can click either of them to interact with the "Ethereum" object and perform the connection operation. These two buttons are only used to display both brands' logos to help users understand their operation path.
2. If the "Ethereum" object is not detected, then suggest that users download the extension wallet and provide download links for both "MetaMask" and "Lux Wallet."

This solution does not involve any changes to your actual business logic and is just simple UI adjustments. It does not introduce any uncertainty and is rather low cost.

Potential Issues

According to the above solution, if a user is using the "Lux Wallet" and clicks the "connect to MetaMask" button, they will still interact with the "Lux Wallet" and vice versa, which might be a bit weird.

However, this issue is a very rare scenario and very unlikely to happen because users are not likely to click and interact with an extension wallet they haven't installed. Even if it happens, it's not a real problem from the user's perspective.

Please don't hesitate to reach out if you have any doubts.

Contribution

Install Dependency

1. Install Node.js version 14 or later.
2. Install Yarn: npm install -g yarn
3. Run yarn to install dependencies.

Development

Run yarn build:dev to develop with file watching and development logging (you can see requests sent by the dapp in the website console in this mode, and notifications will not close when focus is lost).

Run yarn build:pro to build a production package, which will be in the dist folder.

Architecture

Extension's Scripts

Below 4 scripts all live in different contexts!

background.js

Handles all async requests and encryption tasks.

User's keyrings, passwords, and wallet personal preference data are all stored in Chrome local storage.

It has 2 main controllers:

1. walletController

   Exposes methods to the background window, so other scripts can access these methods with runtime.getBackgroundPage, e.g., ui.js.

2. providerController

   Handles requests from pages (dapp requests).

content-script

Injected at document_start, shares the same DOM with the dapp, and uses broadcastChannel to tap pageProvider.

The main purpose is to inject pageProvider.js and pass messages between pageProvider.js and background.js.

pageProvider.js

This script is injected into the dapp's context through content-script. It mounts ethereum to window.

When the dapp uses window.ethereum to request, it will send a message to content-script with broadcastChannel and wait for its response.

Then the content-script will send a message to background with runtime.connect.

After background receives the message, it will use providerController to handle the request and keep the message channel in sessionService for later communication.

ui

Used by 3 pages which share the same JS code, but the HTML template is different for each respective purpose.

1. notification.html

   Triggered by the dapp to request the user's permission.

2. index.html

   Opened in a browser tab for a better user interaction experience.

3. popup.html

   Shown when the user clicks the extension icon to the right of the address bar.

Thanks

Thanks to contributions from the MetaMask team to the browser extension wallet community, Lux uses (or forks) them to make Lux better.