Metamask: WalletConnect (Metamask Mobile) configuration with React Native app

Metamask: Setting Up WalletConnect with React Native App

In this article, we will explore how to set up a Metamask wallet in your React Native app using WalletConnect. We will focus on integrating it into your Expo mobile app or Xcode.

What is WalletConnect?

WalletConnect is an open-source protocol that allows users to send and receive cryptocurrencies without having to download any wallet. It enables seamless interactions between dApps (decentralized applications) and wallet providers, such as Metamask, in a secure and scalable manner.

Prerequisites

To use WalletConnect with Metamask, you’ll need:

• A Metamask wallet

• Expo or Xcode

• The React Native CLI installed

Step 1: Set up WalletConnect configuration

Create a new file called metamask.json in your project directory:

{
"wallet": {
"id": "YOUR_METAMASK_ID",
"secretKey": "YOUR_METAMASK_SECRET_KEY"
}
}

Replace YOUR_METAMASK_ID and YOUR_METAMASK_SECRET_KEY with the actual ID and secret key of your Metamask wallet.

Step 2: Create a new React Native Expo project or Xcode app

If you’re using Expo, run:

expo init metamask-wallet

Otherwise, create an Xcode project (or use the iOS equivalent) with the following settings:

• File -> New -> Project…

• Choose “React Native” and select “Application”

• Set your app name to Metamask Wallet

Step 3: Set up Metamask in your React Native Expo app

Open the metamask.json file in your project directory and add the following code:

import { initialize } from 'metamask-wallet';
initialize({
walletId: 'YOUR_METAMASK_ID',
secretKey: 'YOUR_METAMASK_SECRET_KEY'
});

Step 4: Integrate WalletConnect

In your React Native Expo app, add the following code to handle WalletConnect:

import { useWalletConnect } from '@metamask-connect/react-native';
const App = () => {
const { account, connection, error } = useWalletConnect({
id: 'YOUR_METAMASK_ID',
secretKey: 'YOUR_METAMASK_SECRET_KEY'
});
if (error) {
console. error(error);
return null;
}
// Handle wallet changes
const onAccountChange = async () => {
console. log('Wallet account changed');
};
return (
{account && (
Connected to Metamask: {account}
)}
 connection.request({ account })} />
);
};

Step 5: Show QR Code Modal (Optional)

If you want to show a QR code modal when your app launches, add the following code:

import { useWalletConnect } from '@metamask-connect/react-native';
const App = () => {
const { account, connection, error } = useWalletConnect({
id: 'YOUR_METAMASK_ID',
secretKey: 'YOUR_METAMASK_SECRET_KEY'
});
if (error) {
console. error(error);
return null;
}
// Show QRCode modal when app starts
const showModal = () => {
connection.request({ account });
};
return (
{account && (
Connected to Metamask: {account}
)}
 connection.request({ account })) />
);
};

That’s it! You now have the Metamask wallet set up in your React Native Expo app using WalletConnect. When your app is launched, the QR code modal will appear, allowing users to connect their wallet.

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