Metamask: Connect MetaMask mobile app to React Native Dapp with DeepLinks

Connecting MetaMask Mobile App to React Native Dapp with DeepLinks

As a React Native app developer, you’re probably familiar with the importance of seamless user experiences across platforms. One such feature is connecting your app directly to external wallets like MetaMask, similar to OpenSea. In this article, we’ll explore how to do this using the Metamask library and deep linking.

Why Deep Linking?

Deep linking is a powerful feature in React Native that allows you to open an app or website by clicking a link within your app’s URL. This can be particularly useful for connecting external wallets like MetaMask, as it provides a clean, native experience for users.

Step 1: Install the Metamask Library

To get started, install the Metamask library using npm:

npm install metamask

This will add the Metamask package to your project’s dependencies.

Step 2: Initialize MetaMask in your application

Create a new file called metaMask.js in your application directory. This file will contain the MetaMask initialization logic.

import { MetaMask } from '@metamask-connect/extension';
const metaMask = new MetaMask({
id: 'YOURMetaMask_ID', // Replace with your MetaMask ID
});
export default metaMask;

Replace YOURMetaMask_ID with your actual MetaMask wallet ID.

Step 3: Use Deep Links to Connect to MetaMask

Create a new file called Connect.js in your application directory. This file will handle the deep link logic.

import React, { useState } from 'react';
import { Provider } from '@metamask-connect/extension';
const Connect = () => {
const [connected, setConnected] = useState(false);
const onConnect = async (wallet) => {
if (!wallet) return;
metaMask.on('connect', () => {
setConnected(true);
});
metaMask.on('disconnect', () => {
setConnected(false);
});
};
return (
);
};
export defaultConnect;

In this example, we are using Metamask’s Provider component to connect to MetaMask. We define a connected state variable and an onConnect event handler. When the user clicks the link to connect to MetaMask, the onConnect function is called, which sets connected to true if the wallet was successfully connected.

Step 4: Use Deep Links in Your Application

To use deep links to connect to your application, you will need to create a new file called App.js. This file will define the route to connect to MetaMask.

import React from 'react';
import { Link } from 'react-router-dom';
import Connect from './Connect';
const App = () => {
return (
Connect to MetaMask
);
};
export default App;

In this example, we are creating a Link component that points to the /connect route. When the user clicks on this link, they will be taken directly to the Metamask application.

Putting it all together

Here is an updated version of your application’s App.js file:

import React from 'react';
import { Link } from 'react-router-dom';
import MetaMaskConnect from './MetaMaskConnect';
const App = () => {
return (
Connect to MetaMask
);
};
export default App;

In this example, we are using the MetaMaskConnect component from our own MetaMask.js file. This component handles the deep link logic and connects to MetaMask when the user clicks the link.

Conclusion

Connecting your React Native app directly to external wallets like MetaMask is a powerful feature that provides a seamless experience for your users.

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