Metamask: Connect React Native App to Metamask

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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 users with an intuitive way to interact with MetaMask and access various features of the wallet. In this article, we will walk you through the steps to connect your React Native app to MetaMask.

Prerequisites

Before you begin, make sure:

• You have a MetaMask wallet installed on your device.

• Your React Native app is set up 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 application.

Step 1: Add MetaMask to your app

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

a.
Create new file

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

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 provider: Use MetaMaskProvider component to wrap your app and provide access to MetaMask:

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

Step 2: Handle MetaMask instance

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

import { useInstance } from 'react-native-metamask';
const App = () => {
const instance = useInstance();
return (
<script src="
<script
dangerouslySetInnerHTML={{
__html: <script
type="module"
ref={instance}
onInstanceCreated={() => console.log('MetaMask instance created')}
>,
}}
/>
);
};

This code logs a message to the console when 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 (
<script src="
<script
dangerouslySetInnerHTML={{
__html: <script
type="module"
ref={instance}
onAccountUpdated={(newAccount) => console.log('New account:', newAccount)}
>,
}}
/>
);
};

This code logs a message to the console when an account balance changes.

Conclusion

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

Note: Keep your MetaMask API key safe and do not share it publicly.

Additional Tips

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