Calyptus Solidity Challenge #271 🕵️‍♂️

generateSignature.js

const { ethers } = require("ethers");

// Replace with your private key
const privateKey = "YOUR_PRIVATE_KEY"; // NEVER commit your private key!
const yourAnswer = 144;
const yourTwitterHandle = "Abc"; //case-sensitive

// Connect to the wallet
const wallet = new ethers.Wallet(privateKey);

// Function to sign the message
async function signMessage() {
  const message = ethers.utils.solidityKeccak256(
    ["uint256", "string"],
    [yourAnswer, yourTwitterHandle]
  );
  const arrayifyMessage = ethers.utils.arrayify(message);
  const signature = await wallet.signMessage(arrayifyMessage);

  console.log("Message:", arrayifyMessage);
  console.log("Signature:", signature);
  console.log("address:", wallet.address);
}

signMessage().catch(console.error);

verifySignature.js

const { ethers } = require("ethers");

// The message that was signed - replace these with the actual values
const yourAnswer = 144;
const yourTwitterHandle = "Abc"; //case-sensitive

// The signature - replace this with the actual signature string
const signature = "YOUR_SIGNATURE";

// Function to retrieve the signer's address
async function getSignerAddress() {
  // Recreate the message that was originally signed
  const message = ethers.utils.solidityKeccak256(
    ["uint256", "string"],
    [yourAnswer, yourTwitterHandle]
  );
  const arrayifyMessage = ethers.utils.arrayify(message);

  // Recover the address of the signer
  const signerAddress = ethers.utils.verifyMessage(arrayifyMessage, signature);
  console.log("Signer Address:", signerAddress);
}

getSignerAddress().catch(console.error);