Connect Metamask React Dapp

Overview

In this tutorial, we will be building a simple React / Web3 Dapp that replicates a part of the Uniswap v2 interface. Specifically, we will be creating the “account login” button that enables users to connect to a Dapp using their MetaMask extension. By the end of the tutorial, you will have a working React app that can connect to your MetaMask account, read your address, and ETH balance. The tutorial uses the following technologies: React, TypeScript, ethers.js, @usedapp/core, and @chakra-ui/react.

Features

• Account login button to connect to MetaMask
• Display of active account’s address
• Display of active account’s ETH balance

Installation

1. Install the MetaMask extension for your browser.
2. Set up an Ethereum account using MetaMask.
3. Create a new Create React App project with TypeScript template by running the following commands in your console:

   npx create-react-app simple-web3-dapp --template typescript
   

4. Delete the code in the index.tsx file and replace it with the provided code.
5. Install the necessary libraries by running the following command:

   npm install ethers.js@5.4.0 @usedapp/core@0.4.1 @chakra-ui/react@1.6.5
   

6. Import the DAppProvider from useDApp in the index.tsx file.
7. Use the imported DAppProvider to set up an app-wide provider in the index.tsx file.

Summary

This tutorial guides you through the process of building a simple React / Web3 Dapp that replicates the account login functionality of the Uniswap v2 interface. It uses React, TypeScript, ethers.js, @usedapp/core, and @chakra-ui/react. The tutorial covers installation, including setting up MetaMask and creating a React project. It also highlights the key features of the app, such as the account login button and display of account information.