hardhat.config.ts

import * as dotenv from "dotenv";

import { HardhatUserConfig, task } from "hardhat/config";
import "@nomiclabs/hardhat-etherscan";
import "@nomiclabs/hardhat-waffle";
import "@nomiclabs/hardhat-web3";
import "@typechain/hardhat";
import "hardhat-gas-reporter";
import "solidity-coverage";

dotenv.config();

// This is a sample Hardhat task. To learn how to create your own go to
// https://hardhat.org/guides/create-task.html
task("accounts", "Prints the list of accounts", async (taskArgs, hre) => {
  const accounts = await hre.ethers.getSigners();

  for (const account of accounts) {
    console.log(account.address);
  }
});

task("balance", "Prints an account's balance")
  .addParam("account", "The account's address")
  .setAction(async (taskArgs, hre) => {
    const account = hre.web3.utils.toChecksumAddress(taskArgs.account);
    const balance = await hre.web3.eth.getBalance(account);

    console.log(hre.web3.utils.fromWei(balance, "ether"), "ETH");
  });

// npx hardhat --network rinkeby --contract {address}
task("attack08", "Attacks the contract")
  .addParam("contract", "The contract's address")
  .setAction(async (taskArgs, hre) => {
    const passwd = await hre.web3.eth.getStorageAt(taskArgs.contract, 1);
    console.log("The password in hex: ", passwd);
    console.log("The password readable: ", hre.web3.utils.hexToAscii(passwd));
  });

task("attack12", "Attacks Quest 12")
  .addParam("contract", "The contract's address")
  .setAction(async (taskArgs, hre) => {
    const data = await hre.web3.eth.getStorageAt(taskArgs.contract, 5);
    console.log("The data in hex: ", data);
    const dataBytes = hre.web3.utils.hexToBytes(data);
    const dataBytes16 = dataBytes.slice(0, 16);
    const _key = hre.web3.utils.bytesToHex(dataBytes16);
    console.log("The data in bytes16", _key);
    // in web console, execute: contract.unlock(_key)
  });

// You need to export an object to set up your config
// Go to https://hardhat.org/config/ to learn more

const config: HardhatUserConfig = {
  solidity: {
    compilers: [
      {
        version: "0.6.6",
        settings: {
          optimizer: {
            enabled: true,
            runs: 200,
          },
        },
      },
      {
        version: "0.8.4",
        settings: {
          optimizer: {
            enabled: true,
            runs: 200,
          },
        },
      },
    ],
  },
  networks: {
    rinkeby: {
      url: process.env.RINKEBY_URL || "",
      gas: 20000000,
      gasPrice: 20000000000,
      gasMultiplier: 2,
      accounts:
        process.env.PRIVATE_KEY !== undefined ? [process.env.PRIVATE_KEY] : [],
    },
    ropsten: {
      url: process.env.ROPSTEN_URL || "",
      accounts:
        process.env.PRIVATE_KEY !== undefined ? [process.env.PRIVATE_KEY] : [],
    },
    ganacha: {
      url: "http://127.0.0.1:7545",
    },
  },
  gasReporter: {
    enabled: process.env.REPORT_GAS !== undefined,
    currency: "USD",
  },
  etherscan: {
    apiKey: process.env.ETHERSCAN_API_KEY,
  },
};

export default config;