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web3 test init samples
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2024-08-19 12:17:33 +02:00
parent 66f6e103c2
commit de33616e67
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auth.html Normal file
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Wallet Authentication</title>
<script src="https://cdn.jsdelivr.net/npm/web3@1.3.5/dist/web3.min.js"></script>
</head>
<body>
<button id="login">Login with MetaMask</button>
<script>
document.getElementById('login').onclick = async () => {
if (typeof window.ethereum !== 'undefined') {
const web3 = new Web3(window.ethereum);
try {
// Request account access
await window.ethereum.request({ method: 'eth_requestAccounts' });
// Get the user's account
const accounts = await web3.eth.getAccounts();
const account = accounts[0];
// Sign a message
const message = "Sign this message to authenticate";
const signature = await web3.eth.personal.sign(message, account);
// Send the signature to the server for verification
fetch('/verify_signature.php', {
method: 'POST',
headers: {
'Content-Type': 'application/json'
},
body: JSON.stringify({ account, signature, message })
}).then(response => response.json())
.then(data => {
if (data.verified) {
alert('Authentication successful!');
} else {
alert('Authentication failed!');
}
});
} catch (error) {
console.error('User denied account access:', error);
}
} else {
alert('Please install MetaMask!');
}
};
</script>
</body>
</html>

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verify.php Normal file
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<?php
require_once 'path/to/web3.php/src/Web3/Providers/HttpProvider.php';
require_once 'path/to/web3.php/src/Web3/RequestManagers/RequestManager.php';
require_once 'path/to/web3.php/src/Web3/Web3.php';
require_once 'path/to/web3.php/src/Web3/Eth.php';
require_once 'path/to/web3.php/src/Web3/Utils.php';
// https://github.com/sc0Vu/web3.php
// https://github.com/kornrunner/php-keccak
// https://github.com/web3p/ethereum-util
// Include the necessary files
require_once 'path/to/Keccak.php'; // Adjust the path
require_once 'path/to/Util.php'; // Adjust the path
use kornrunner\Keccak;
use Web3p\EthereumUtil\Util;
function verifySignature($address, $signature, $message) {
$util = new Util();
// Hash the message
$msgHash = Keccak::hash("\x19Ethereum Signed Message:\n" . strlen($message) . $message, 256);
// Recover the public key from the signature
$pubKey = $util->recoverPublicKey($msgHash, $signature);
// Convert the public key to an Ethereum address
$derivedAddress = $util->publicKeyToAddress($pubKey);
// Compare the derived address with the given address
return strtolower($address) === strtolower($derivedAddress);
}
// Fetch and decode the JSON POST request
$data = json_decode(file_get_contents('php://input'), true);
$account = $data['account'];
$signature = $data['signature'];
$message = $data['message'];
$verified = verifySignature($account, $signature, $message);
echo json_encode(['verified' => $verified]);