Pulse Wallet Chromium - Unstoppable Version

Pulse Wallet Chromium is an open source browser plugin for the DeFi ecosystem, providing users with a better-to-use and more secure multi-chain experience.

Install

You can Download the latest Pulse Wallet Chromium here.

Guideline for integrating Pulse Wallet Chromium

To help dapp developers support and integrate Pulse Wallet Chromium more easily, we recommend you use 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 displays a "connect to MetaMask" button by default which brings a lot of confusion to the users as any Web3 wallet can inject this "Ethereum" object.

Potential issues:

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

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

Please don't hesitate to reach us if you have any doubt.

Contribution

Install dependency

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

Development

Run yarn build:dev to develop with file watching and development log(you can see request sent by dapp in website console in this mode and notification will not close when focus lost)

Run yarn build:pro to build a production package, it's in dist folder

Architecture

Extension's scripts

below 4 scripts all live in different context!

- background.js

for all async request and encrypt things.

user's keyrings, password and wallet personal preference data all stored in chrome local storage.

it has 2 main controllers:

1. walletController

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

2. providerController

   it handles request from pages(dapp request).

- content-script

injected at document_start, share the same dom with dapp, use broadcastChannel to tap pageProvider.

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

- pageProvider.js

this script is injected into dapp's context through content-script. it mounts ethereum to window.

when dapp use window.ethereum to request, it will send message to content-script with broadcastChannel and wait for it's response.

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

after background receive the message, it will use providerController to handle the request. and keep the message channel in sessionSevice for later communicate.

- ui

it's used by 3 pages which share the same js code, but the template html is different for respective purpose.

1. notification.html

   triggered by dapp to request user's permission.

2. index.html

   opened in browser tab for better user interaction experience.

3. popup.html

   user click the extension icon on the right of address bar, the popup will show.

Thanks

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

Other Docs

• How to add a new translation to MetaMask