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Seamless Authentication in Decentralized Apps with Metamask

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Chapter 1: Introduction to User Authentication

In this guide, we'll explore how to implement user authentication in your decentralized application (dApp) using Metamask and Moralis. This process allows users to connect their wallets seamlessly, enhancing the user experience.

Here is a quoted note about the significance of wallet authentication in dApps.

Section 1.1: Understanding Moralis and Wallet Integration

Recently, we introduced Moralis and discussed its role in blockchain development. Now, we aim to delve deeper into how you can utilize it for wallet-based authentication. If you missed our initial overview, check out the introduction to Moralis here.

The goal is straightforward: leverage Moralis as a backend service to facilitate wallet authentication for users. It's essential that users have either the Metamask browser extension or mobile app installed for smooth access.

For testing, you'll need a Metamask account, which is crucial as you’ll likely build more dApps in the future. Therefore, I recommend setting up a Metamask account and installing the Chrome extension.

Section 1.2: Setting Up Your Moralis Server

To begin, you can create a Moralis server at no cost, similar to starting a project in Firebase. Each server requires some basic information, including the network and region, and the setup form is user-friendly. Once submitted, Moralis will automatically generate a dedicated server for you.

After creation, you can view server details by clicking on "View details," which opens a modal displaying essential information like the server URL and app ID. These credentials are vital for connecting your application to the Moralis servers.

Chapter 2: Building Your Application

Section 2.1: Setting Up the Code Repository

Let’s start by creating a repository for our demo application. As an enthusiast of Material UI and Next.js, I will utilize these technologies. You can download the repository directly from this link.

After setting up the repository, a few additional packages are required to successfully connect your project with the Moralis server.

Subsection 2.1.1: Connecting to Moralis

To connect the Moralis server, follow these steps:

  1. Install the React Moralis npm module.
  2. Wrap the Moralis provider around the application's root and pass the server URL and app ID as props. You can find these details in the Moralis dashboard.
  3. Ensure that you have the Metamask Chrome extension or mobile application installed.

To install the React Moralis module, execute the following command:

yarn add react-moralis moralis @walletconnect/web3-provider

Once the installation is complete, import MoralisProvider from react-moralis and wrap it around the root of your application in the _app.js file located within the pages directory. Remember to include the server URL and app ID in the provider's props.

For security reasons, keep your server URL and app ID confidential; it's advisable to store them in a .env file or within next.config.js.

Section 2.2: Implementing User Authentication

If you have connected Metamask, you can easily add authentication with a single line of code. After a successful login, user details—such as tokens and wallet address—are stored in the Moralis dashboard under the User table.

import { useMoralis } from 'react-moralis';

const { authenticate, logout, user, isAuthenticated } = useMoralis();

function login() {

authenticate();

}

function logoutUser() {

logout();

}

useEffect(() => {

if (isAuthenticated) {

console.log(user, 'user');

}

}, [user]);

When you log the authenticated user object, it will return details like address, username, user ID, and account creation timestamp, with all necessary information securely stored in the Users table.

Once users connect their wallets, their information—such as address and tokens—can be utilized to enable various functionalities, including NFT purchases, transaction execution, and token swaps.

Conclusion

This guide primarily focused on integrating Metamask wallet authentication with the Moralis server. We've outlined the necessary steps in a straightforward manner to ensure clarity. If you have any questions, feel free to drop a comment, and I'll respond as soon as possible. Until next time, take care!

Here is the link to the code base:

http://www.ihatereading.in/createrepo?framework=Blockchain&repoId=-MtX6rODx3oLL4JRKSXc

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