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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title></title>
<script src="https://cdn.jsdelivr.net/npm/web3@latest/dist/web3.min.js"></script>
</head>
<body>
<button onclick="connect()">Login with Web3</button>
<script type="text/javascript">
let account = null;
let accessToken = null;
const connect = async () => {
if (window.ethereum) {
await window.ethereum.send('eth_requestAccounts')
window.w3 = new Web3(window.ethereum)
var accounts = await w3.eth.getAccounts()
account = accounts[0];
accessToken = await authenticate()
let opts = {
method: 'GET',
headers: {
'Content-Type': "application/json",
'Authorization': `Bearer ${accessToken}`
}
}
let res = await fetch(`/secret`, opts)
alert(await res.text())
}
}
const authenticate = async () => {
let res = await fetch(`/nonce?address=${account}`)
let resBody = await res.json()
let signature = await w3.eth.personal.sign(resBody.message, account)
let opts = {
method: 'POST',
headers: {
'Content-Type': "application/json",
'Authorization': `Bearer ${resBody.tempToken}`
}
}
res = await fetch(`/verify?signature=${signature}`, opts)
resBody = await res.json()
console.log(resBody)
return resBody.token
}
</script>
</body>
</html>
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