Blockchain technology and cryptocurrencies have gained immense popularity, leading to a growing demand for secure and user-friendly cryptocurrency wallets. Two prominent wallets in the crypto community, Trust Wallet and MetaMask, offer unique features and advantages. In this article, we’ll delve into the process of integrating both Trust Wallet and MetaMask into a web application using pure JavaScript. This integration enables users to seamlessly connect their preferred wallet and interact with decentralized applications (DApps) on the Ethereum blockchain.
Prerequisites:
Before embarking on the integration process, ensure you have the following:
Step 1: Include Web3.js Library
To begin, create the fundamental HTML structure for your web application. We’ll incorporate a button that users can click to initiate the wallet connection:
<!DOCTYPE html>
<html>
<head>
<title>Trust Wallet & MetaMask Integration</title>
</head>
<body>
<!-- Your HTML content goes here -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/web3/1.5.2/web3.min.js"></script>
<script>
// Your JavaScript code will go here
</script>
</body>
</html>
Step 2: Detect and Connect to Wallet
Next, you’ll need to detect if the user has a Web3 provider, such as Trust Wallet or MetaMask, installed in their browser. You can do this by checking for the presence of the window.ethereum object, which these wallets inject into the global scope:
async function connectWallet() {
try {
if (window.ethereum) {
// For modern dapp browsers like Trust Wallet and MetaMask
const web3 = new Web3(window.ethereum);
// Request account access
await window.ethereum.enable();
// Get the selected account
const accounts = await web3.eth.getAccounts();
// Display the connected account
alert(`Connected to ${accounts[0]}`);
} else {
// Fallback for non-dapp browsers
alert("Please install a wallet like Trust Wallet or MetaMask to use this feature.");
}
} catch (error) {
console.error(error);
// Handle error here
}
}Step 3: Trigger the Connection
Now, you can add a button or any element with an onclick event to initiate the wallet connection when clicked. Upon clicking, a prompt will ask the user to connect their wallet to your web application:
<!DOCTYPE html>
<html>
<head>
<title>Trust Wallet & MetaMask Integration</title>
</head>
<body>
<h1>Connect to Trust Wallet or MetaMask</h1>
<button onclick="connectWallet()">Connect Wallet</button>
<!-- Your other HTML content goes here -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/web3/1.5.2/web3.min.js"></script>
<script>
async function connectWallet() {
try {
if (window.ethereum) {
// For modern dapp browsers like Trust Wallet and MetaMask
const web3 = new Web3(window.ethereum);
// Request account access
await window.ethereum.request({ method: 'eth_requestAccounts' });
// Get the selected account
const accounts = await web3.eth.getAccounts();
// Update the status
document.getElementById('status').innerText = `Status: Connected to ${accounts[0]}`;
} else {
// Fallback for non-dapp browsers
alert("Please install a wallet like Trust Wallet or MetaMask to use this feature.");
}
} catch (error) {
if (error.code === 4001) {
// User rejected the connection request
alert("Connection request rejected by the user.");
} else {
// Other error
console.error(error);
alert("An error occurred while connecting to the wallet. Please try again later.");
}
}
}
</script>
</body>
</html>Step 4: Handle Additional Interactions
Your integration can be extended to handle various interactions with the connected wallet, such as sending transactions, checking balances, or interacting with smart contracts. For more advanced functionality, consult the Web3.js documentation and explore examples.
In conclusion, integrating Trust Wallet and MetaMask using pure JavaScript empowers your web application users to securely access blockchain networks and engage with decentralized applications (DApps). By following these steps and continuously exploring Web3.js capabilities, you can create a seamless and user-friendly blockchain experience for your audience.
