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

Metamask: WalletConnect Setup 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 or Xcode mobile app.

What is WalletConnect?

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

Prerequisites

To use WalletConnect with Metamask, you will need:

• A Metamask wallet

• Expo or Xcode

• React Native CLI installed

Step 1: Configure WalletConnect configuration

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

{
wallet': {
"id": "METAMASK_ID",
secretKey": "YOUR_METAMASK_SECRET_KEY"
}
}

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

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 "App"

• Set your app name to "Metamask Wallet".

Step 3: Configure Metamask in your React Native Expo app

Open themetamask.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 the QRCode modal (optional)

If you want to show a QRCode modal when the 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 the modal QRCode when the app is launched
const showModal = () => {
connection.request({ account });
};
return (
{account && (
Connected to Metamask: {account}
)}
 connection.request({ account })) />
);
};

That’s it! You now have your Metamask wallet configured in your React Native Expo app using WalletConnect. When your app launches, the QRCode module will appear, allowing users to connect their wallet.

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