MetaMask: Connect MetaMask mobile app to React Native Dapp using DeepLinks

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Connecting MetaMask Mobile App to React Native Dapp with DeepLink

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

Why Deep Links?

Deep links are a powerful feature of React Native that allows you to open an app or website by clicking a link within your app’s URL. This can be especially 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 app

Create a new file named metaMask.js in your app directory. This file will contain the initialization logic for MetaMask.

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 the actual ID of your MetaMask wallet.

Step 3: Use deep links to connect to MetaMask

Create a new file named Connect.js in your app 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 default Connect;

In this example, we are using the Provider component from Metamask to connect to MetaMask. We define a state variable connected and an event handler onConnect. 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 app

To use deep links to connect to your app, you will need to create a new file called App.js. This file will define the path 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 path. When the user clicks this link, they will be taken directly to the Metamask app.

Putting it all together

Here is an updated version of your app’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 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.