Decentralized-KYC-system/ethers_test.html at main · BEGINNERUSER-git/Decentralized-KYC-system · GitHub

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<!DOCTYPE html>
<html>
<head>
  <title>Ethers Test</title>
  <!-- Load ethers.js from CDN -->
  <script src="https://cdn.jsdelivr.net/npm/ethers@6.13.2/dist/ethers.umd.min.js"></script>
</head>
<body>
  <h2>MetaMask Signature Test</h2>
  <button id="sign">Sign Message</button>

  <script>
    document.getElementById("sign").onclick = async () => {
      if (!window.ethereum) {
        alert("MetaMask not found. Please install it.");
        return;
      }
      try {
        // Connect to provider
        const provider = new ethers.BrowserProvider(window.ethereum);
        await window.ethereum.request({ method: "eth_requestAccounts" });

        // Get signer
        const signer = await provider.getSigner();

        // Replace this with your backend-provided nonce
        const nonce = "b09487af2b002015fe7d98031914dff7aaebd9308fa00b985bcc54424aacd53b";

        // Ask MetaMask to sign
        const signature = await signer.signMessage(nonce);

        console.log("Signature:", signature);
        alert("Signature: " + signature);
      } catch (err) {
        console.error(err);
        alert("Error: " + err.message);
      }
    };
  </script>
</body>
</html>