Metamask Chrome Extension

MetaMask Chrome extension: Your key to decentralized finance. Securely manage Ethereum assets, access DeFi protocols, and explore the evolving landscape of blockchain technology.

One-click Login With Blockchain: A MetaMask Tutorial

Discover how effortlessly you can integrate blockchain-based login functionality into your application using MetaMask, a popular wallet provider in the Ethereum ecosystem. Enabling users to sign in with their blockchain identity not only enhances security but also simplifies the login process. Follow this concise tutorial to implement a one-click login feature using MetaMask.

Step 1: Install MetaMask

Before integrating MetaMask login, ensure you have the MetaMask extension installed in your browser. Visit MetaMask and add it to your preferred browser.

Step 2: Detect MetaMask

In your application's JavaScript, first check if MetaMask is installed:

if (typeof window.ethereum !== 'undefined' && window.ethereum.isMetaMask) {
  console.log('MetaMask is installed.');
} else {
  console.log('Please install MetaMask.');
}

Step 3: Request Account Access

Prompt the user to connect their MetaMask account with your application:

async function connectAccount() {
  const accounts = await window.ethereum.request({ method: 'eth_requestAccounts' });
  const account = accounts[0];
  console.log('Connected account:', account);
}

Call connectAccount() when you want to trigger the login process, such as on a button click.

Step 4: Verify User Identity

To ensure the user owns the connected account, it's a good practice to verify by requesting them to sign a message:

async function verifyIdentity() {
  const accounts = await window.ethereum.request({ method: 'eth_requestAccounts' });
  const account = accounts[0];
  
  const message = 'Please sign this message to confirm your identity.';
  const signature = await window.ethereum.request({
    method: 'personal_sign',
    params: [message, account],
  });
  console.log('Signature:', signature);
}

Step 5