Test Extension

This is a simple extension that can be used for testing the use of MetaMask provider from another extension.

MV2 and MV3

This repository provides 2 types of extension, that you can load using the different github branches:

• main branch is a Manifest V2 Chrome extension and should be paired with a MetaMask MV2 version
• mv3 branch is a Manifest V3 Chrome extension and should be paired with a MetaMask MV3 version

Relevant Code

There are 2 approaches trying different dependencies.

metamask-extension-provider

• The extension/src/main.js file contains the necessary code for importing MetaMask provider.
• This function is then called on extension/src/App.js.

@metamask/providers

• The background.js file contains the necessary code for importing MetaMask provider from the background script.

MV2 vs MV3

• On the file manifest.json the extension is defined either as an MV2 or an MV3 type.

Setup

1. Install MetaMask on Chrome
2. Clone this repository
3. Change to extension folder and install dependencies cd extension npm i
4. Build the extension npm run extension
5. Import extension root folder into Chrome
6. Click Connect to MetaMask
7. Check background console and verify that window.ethereum is injected correctly

IMPORTANT

To use this extension in firefox, change FIREFOX_ID on patches/@metamask+providers**.