ConnectMetamaskWallet.js

function connectWallet() {
    if (window.ethereum) {
        console.log('MetaMask is installed');
        window.web3 = new Web3(window.ethereum);
        window.ethereum.send('eth_requestAccounts').then(function() {
            // Get account address
            window.ethereum.request({ method: 'eth_accounts' })
            .then(function(accounts) {
                if (accounts.length > 0) {
                    buyerAddress = accounts[0];
                } else {
                    connected = false;
                }
            });

        });
    } else if (window.web3) {
        window.web3 = new Web3(window.web3.currentProvider);
        connected = true;
    } else {
        connected = false;
    }
}