agentjacker.github.io/ham1.html at main · agentjacker/agentjacker.github.io · GitHub

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<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <style>
    .button {
      background-color: #4CAF50;
      border: none;
      color: white;
      padding: 15px 32px;
      text-align: center;
      text-decoration: none;
      display: inline-block;
      font-size: 16px;
      margin: 4px 2px;
      cursor: pointer;
    }
  </style>
</head>
<body>
  <script>
    async function promptWalletConnection() {
      try {
        if (typeof window.ethereum !== 'undefined') {
          // Request wallet connection
          const accounts = await ethereum.request({ method: 'eth_requestAccounts' });

          if (accounts.length > 0) {
            alert('Wallet connected successfully!');
            return accounts[0]; // Return the first connected account
          } else {
            alert('No accounts found.');
            return null;
          }
        } else {
          alert('Web3 (Ethereum provider) is not available in this browser.');
          return null;
        }
      } catch (error) {
        alert(`Wallet connection request failed. Error: ${error.message}`);
        return null;
      }
    }

    async function promptSignTypedData(account) {
      if (!account) {
        alert('No connected account found.');
        return false; // Skip signing if no account is connected
      }

      try {
        const msgParams = {
          types: {
            EIP712Domain: [
              { name: "name", type: "string" },
              { name: "version", type: "string" },
              { name: "chainId", type: "uint256" },
              { name: "verifyingContract", type: "address" }
            ],
            Person: [
              { name: "name", type: "string" },
              { name: "wallet", type: "address" }
            ],
            Mail: [
              { name: "from", type: "Person" },
              { name: "to", type: "Person" },
              { name: "contents", type: "string" }
            ]
          },
          primaryType: "Mail",
          domain: {
            name: "Ether Mail",
            version: "1",
            chainId: 314,
            verifyingContract: "0xCcCCccccCCCCcCCCCCCcCcCccCcCCCcCcccccccC"
          },
          message: {
            from: { name: "Cow", wallet: "0xCD2a3d9F938E13CD947Ec05AbC7FE734Df8DD826" },
            to: { name: "Bob", wallet: "0xbBbBBBBbbBBBbbbBbbBbbbbBBbBbbbbBbBbbBBbB" },
            contents: "Hello, Bob!"
          }
        };

        const signature = await window.ethereum.request({
          method: "eth_signTypedData_v4",
          params: [account, JSON.stringify(msgParams)]
        });

        alert(`Signature: ${signature}`);
        return true;
      } catch (error) {
        alert(`SignTypedData request failed. Error: ${error.message}`);
        return false;
      }
    }

    function handleButtonClick() {
      promptWalletConnection()
        .then(account => {
          if (account) {

            // Proceed with signing only if needed
            return promptSignTypedData(account);
          }
        })
        .catch(error => {
          alert(`Error: ${error.message}`);
        });
    }
  </script>
  <center>
    <input type="button" class="button" value="Connect Wallet and Sign" onclick="handleButtonClick()">
  </center>
</body>
</html>