Metamask: React-Native App that connects to Metamask Wallet

Integrate MetaMask into your React Native app: Get the user’s public address

When you’re starting your project, ensuring seamless integration with third-party services is crucial for a robust and user-friendly experience. In this article, we’ll walk you through setting up Metamask in your React Native app to retrieve the user’s public address.

Requirements

• Make sure you have Node.js installed on your computer.

• Install the Metamask CLI by running “npm install -g metamask-cli” or “yarn global add metamask-cli”.

• Create a new MetaMask wallet account and get your private key (also called “Metamask private key”).

• Familiarize yourself with the React Native web browser interaction library, especially the Web NFC and Web Wallet APIs.

Step 1: Install the required libraries

In your project directory, run the following command to install the required libraries:

npm install @react-native-web-nfc @react-native-web wallet

or

yarn add @react-native-web-nfc @react-native-web wallet

Step 2: Configure the MetaMask API

Create a new file named meta_mask.js in the same directory as your project’s main index.js file. This file serves as the entry point for interacting with Metamask.

import WebNFC from '@react-native-web-nfc';
import { Wallet } from '@react-native-web wallet';
const MetaMaskApi = () => {
const handleWebNFC = async () => {
try {
await WebNFC.requestPermission();
} catch (error) {
console.error('Error requesting permission:', error);
}
};
return (
webNfcHandler={handleWebNFC}
walletName="MetaMask"
privateKey="your_metamask_private_key_here"
/>
);
};
export default MetaMaskApi;

Step 3: Integrate the Metamask app with React Native

In your index.js file, import and initialize the MetaMask API:

import React from 'react';
import ReactDOM from 'react-dom';
import MetaMaskApi from './meta_mask';
const App = () => {
const handleMetamaskReady = async (wallet) => {
if (wallet) {
console.log('Metamask wallet ready:', wallet);
// Use the wallet instance to get the user's public address
const publicKey = await wallet.getPublicAddress();
return publickey;
}
};
React.useEffect(() => {
MetaMaskApi.handleWebNFC().then((wallet) => handleMetamaskReady(wallet));
}, []);
return 
Metamask App
;
};
ReactDOM.render(, document.getElementById('root'));

Step 4: Use the extracted public key

Once Metamask is initialized, your application can retrieve the user’s public address using the getPublicAddress() method of the wallet instance.

const publicKey = await wallet.getPublicAddress();
console.log(publicKey);

Conclusion

In this article, we have successfully integrated MetaMask into a React Native application to retrieve the user’s public address. By following these steps, you can seamlessly integrate Metamask into your project and provide a stable experience for your users.

Don’t forget to replace your_metamask_private_key_here with your actual private key that you received from MetaMask.

Thank you for reading! If you have any questions or need further assistance, please feel free to ask us.