Updating the MetaMask Notification in a React App

As a developer building decentralized applications (dapps), you’re likely familiar with the importance of ensuring seamless interactions between your users and your application. One critical aspect is receiving notifications from external services, such as MetaMask, when certain events occur within your app. In this article, we’ll explore how to implement MetaMask notifications in a React app.

Why do we need MetaMask notifications?

MetaMask is the popular browser extension for Ethereum users. When you initiate transactions on the Ethereum network using MetaMask, you can expect various responses from external services, such as:

• Transaction confirmation: The transaction was successful.

• Transaction rejection: The transaction was rejected due to a validation error or other issues.

• Error messages

  : A specific error message related to the transaction.

Setting up MetaMask notifications

To receive these notifications in your React app, you’ll need to set up MetaMask notifications. Here’s how:

• Install the @metamask/notifications package:

npm install @metamask/notifications

• Import the Notifications class and initialize it with the necessary configuration:

import { Notifications } from '@metamask/notifications';


const notifications = new Notifications({

  // Set your notification display settings here

  displaySettings: {

    timeToHide: 5, // seconds

    timeout: 5000, // milliseconds

  },

});

Handling MetaMask notifications in a React app

Now that we have the Notifications class set up, let’s demonstrate how to handle these notifications in a React app. We’ll create a simple example with a TransactionSuccess and TransactionError event handlers.

“`javascript

import React, { useState } from ‘react’;

import MetaMask from ‘@metamask/notifications’;

const App = () => {

const [transactions, setTransactions] = useState([]);

const [transactionType, setTransactionType] = useState(”);

const handleTransactionSuccess = (transaction) => {

// Update the UI with a success message

console.log(‘Transaction successful:’, transaction);

setTransactions((prevTransactions) => […prevTransactions, transaction]);

notifications.clear();

};

const handleTransactionError = (error) => {

// Display an error message in your app

console.error(‘Transaction error:’, error);

notifications.show({

type: ‘error’,

title: ‘Error’,

content: ‘Failed to process the transaction.’,

});

};

return (