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December 19, 2022 10:42
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connect metamask
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import { useState, useEffect } from 'react'; | |
import { ethers } from 'ethers'; | |
import { QRCodeCanvas } from "qrcode.react"; | |
import { randomBytes } from 'ethers/lib/utils'; | |
function App() { | |
const [haveMetamask, sethaveMetamask] = useState(true); | |
const [accountAddress, setAccountAddress] = useState(''); | |
const [accountBalance, setAccountBalance] = useState(''); | |
const [isConnected, setIsConnected] = useState(false); | |
const { ethereum } = window; | |
const provider = new ethers.providers.Web3Provider(window.ethereum); | |
useEffect(() => { | |
const { ethereum } = window; | |
const checkMetamaskAvailability = async () => { | |
if (!ethereum) { | |
sethaveMetamask(false); | |
} | |
sethaveMetamask(true); | |
}; | |
checkMetamaskAvailability(); | |
}, []); | |
const connectWallet = async () => { | |
try { | |
if (!ethereum) { | |
sethaveMetamask(false); | |
} | |
const accounts = await ethereum.request({ | |
method: 'eth_requestAccounts', | |
}); | |
let balance = await provider.getBalance(accounts[0]); | |
let bal = ethers.utils.formatEther(balance); | |
setAccountAddress(accounts[0]); | |
setAccountBalance(bal); | |
setIsConnected(true); | |
} catch (error) { | |
setIsConnected(false); | |
} | |
}; | |
return ( | |
<div className="App"> | |
<div class="flex items-center justify-center h-screen"> | |
<div class="bg-indigo-800 text-white font-bold rounded-lg border shadow-lg p-10"> | |
<header className="App-header"> | |
{haveMetamask ? ( | |
<div className="App-header"> | |
{isConnected ? ( | |
<div className="card"> | |
<div className="card-row"> | |
<h3>Wallet Address:</h3> | |
<p> | |
{accountAddress.slice(0, 4)}... | |
{accountAddress.slice(38, 42)} | |
</p> | |
<QRCodeCanvas | |
id="qrCode" | |
value={accountAddress} | |
size={300} | |
bgColor={"#00ff00"} | |
level={"H"} | |
/> | |
</div> | |
<div className="card-row"> | |
<h3>Wallet Balance:</h3> | |
<p>{accountBalance}</p> | |
</div> | |
</div> | |
) : ( | |
<h1>By Ram</h1> | |
)} | |
{isConnected ? ( | |
<p className="info">🎉 Connected Successfully</p> | |
) : ( | |
<button className="btn" onClick={connectWallet}> | |
Connect | |
</button> | |
)} | |
</div> | |
) : ( | |
<p>Please Install MataMask</p> | |
)} | |
</header> | |
</div> | |
</div> | |
</div> | |
); | |
} | |
export default App; |
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