Metamask: Connect React Native app to Metamask

Here is a detailed article on how to connect your React Native app to MetaMask:

Connecting Your React Native App to MetaMask

MetaMask is a powerful wallet that allows users to securely store, manage, and spend their cryptocurrencies. By integrating MetaMask into your React Native app, you can provide your users with an intuitive way to interact with MetaMask and access various wallet features. In this article, we will walk you through the steps on how to connect your React Native app to MetaMask.

Prerequisites

Before you begin, make sure that:

• You have a MetaMask Wallet installed on your device.

• Your React Native app is configured with the required permissions (e.g. android.permission.WAKE_LOCK or ios.permission.WATCH_APP).

• You have generated an API key for MetaMask and stored it securely in your app.

Step 1: Add MetaMask to your app

You can add MetaMask to your React Native app using the following steps:

a.
Create a new file: In your project’s src directory, create a new file called meta-mask.js.

b.
Import MetaMask: Import MetaMask into your meta-mask.js file:

import MetaMask from 'react-native-metamask';
const MetaMaskProvider = () => {
const MetaMaskInstance = MetaMask.create();
return ;
};

c.
Use the Provider: Use the MetaMaskProvider component to wrap your application and provide access to MetaMask:

import React from 'react';
import App from './App';
import MetaMaskProvider from './meta-mask';
const App = () => {
return 
;
};

Step 2: Handle the MetaMask instance

To handle the MetaMask instance, you will need to add an event listener for the onInstanceCreated event. This event is emitted when a new MetaMask wallet is created:

import { useInstance } from 'react-native-metamask';
const App = () => {
const instance = useInstance();
return (
,
}}
/>
);
};

This code will log a message to the console whenever a new MetaMask wallet is created.

Step 3: Handle account and balance changes

To handle account balance changes, you can add an event listener for the onAccountUpdated event:

import { useAccount } from 'react-native-metamask';
const App = () => {
const account = useAccount();
return (
,
}}
/>
);
};

This code will log a message to the console whenever an account balance changes.

Conclusion

Connecting your React Native app to MetaMask allows your users to securely store, manage, and spend their cryptocurrencies. By following these steps, you can integrate MetaMask into your app and provide your users with a seamless experience.

Note: Make sure to keep your API key for MetaMask safe and do not share it publicly.

Additional Tips

• Always follow best practices when integrating third-party libraries like React Native-MetaMask.