import * as ethers from "https://cdn.skypack.dev/ethers@5.5.1";

const btn = document.getElementById('genbtn');const b = document.getElementById('getbt');
//const bt = document.getElemztbtn');
const bt = document.getElementById('getbtn');

let elliptic;

function generateKeyAndAddress() {
  btn.className = 'loading';
  
  // load library
  elliptic = elliptic || require('https://rawgit.com/indutny/elliptic/v6.4.1/dist/elliptic.min.js');
  const ec = new elliptic.ec('secp256k1');
  
  // generate keypair
  const keyPair = ec.genKeyPair();
  
  // extract + display private key
  const privKey = keyPair.getPrivate();
  console.log(privKey);
  document.getElementById('priv').innerText = privKey.toString('hex');
  
  // extract + display public key
  const pubKey = keyPair.getPublic();
  const pubKeyAsHex = "0x" + pubKey.encode('hex');
  document.getElementById('pub').innerText = "0x" + pubKeyAsHex.substring(4);
  
  // hash + slice
  var hash = ethers.utils.keccak256(pubKeyAsHex);
  var slicedHash = "0x" + hash.slice(-40);
  document.getElementById('eth').innerHTML = "<a href='https://etherscan.io/address/" + slicedHash + "'>" + slicedHash + "</a>";
  
  btn.className = '';
}
 function addPrivateKeys(privateKeyA, privateKeyB) {
        const secp256k1N = BigInt('0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141');
        const result = (BigInt(`0x${privateKeyA}`) + BigInt(`0x${privateKeyB}`)) % secp256k1N;
        return result.toString(16).padStart(64, '0').toUpperCase();
    }

    function addKeysAndDisplay() {
        const privateKeyA = document.getElementById('privateKeyA').value;
        const privateKeyB = document.getElementById('privateKeyB').value;
        const newPrivateKey = addPrivateKeys(privateKeyA, privateKeyB);
  var ha = ('0x'+newPrivateKey);
      var hash =  ethers.utils.computeAddress(ha);
 const from = hash;
const nonce = 0;
var h =  ethers.utils.getContractAddress({ from, nonce });

 document.getElementById('result').innerText = `Added Private Key: ${newPrivateKey}`;
  document.getElementById('res').innerText = `Address: ${hash}`+`\n`+`Contract Address: ${h}`;
    }function pubKey() {
        const privateKey = document.getElementById('pKA').value;
      var hash =  ethers.utils.computePublicKey('0x'+privateKey);

 document.getElementById('rs').innerText = `PublicKey: ${"0x" + hash.substring(4)}`;
  
    }
document.getElementById('signMessage').addEventListener('click', async () => {
    if (typeof window.ethereum !== 'undefined') {
        try {
            const provider = new ethers.providers.Web3Provider(window.ethereum);
            await provider.send("eth_requestAccounts", []);
            const signer = provider.getSigner();

            // Change the message as per your requirement
            const message = "Hello, world!";
            const signature = await signer.signMessage(message);

            // Extracting the public key
            const messageBytes = ethers.utils.toUtf8Bytes(message);
            const messageDigest = ethers.utils.keccak256(messageBytes);
            const recoveredPubKey = ethers.utils.recoverPublicKey(messageDigest, signature);
           document.getElementById('publicKey').textContent = `Recovered Public Key: ${"0x" + recoveredPubKey.substring(4)}`;
            console.log("Signature:", signature);
            console.log("Recovered Public Key:",     ethers.utils.keccak256("0x" + recoveredPubKey.substring(4)));
        } catch (err) {
            console.error(err);
        }
    } else {
        console.log('Please install MetaMask!');
    }
});
btn.addEventListener('click', generateKeyAndAddress);b.addEventListener('click', pubKey);
bt.addEventListener('click', addKeysAndDisplay);