hardhat.config.ts

import fs from "fs";

import "@typechain/hardhat";
import "hardhat-preprocessor";
import { HardhatUserConfig, task } from "hardhat/config";

import "@nomicfoundation/hardhat-toolbox";
import "@openzeppelin/hardhat-upgrades";
// import "@nomiclabs/hardhat-etherscan";
import { NetworkUserConfig } from "hardhat/types";

import { config as dotenvConfig } from "dotenv";

import example from "./tasks/example";
import deploy from "./tasks/deploy";
import deploy2 from "./tasks/deploy";
import { resolve } from "path";

dotenvConfig({ path: resolve(__dirname, "./.env") });

const chainIds = {
  ganache: 1337,
  goerli: 5,
  hardhat: 31337,
  kovan: 42,
  mainnet: 1,
  rinkeby: 4,
  ropsten: 3,
  mumbai: 80001,
  polygon: 137,
  optgoerli: 420,
  arbgoerli: 421613,
  optimism: 10,
  sepolia: 11155111,
  avalanche: 43114,
  bsc: 56,
};

function getRemappings() {
  return fs
    .readFileSync("remappings.txt", "utf8")
    .split("\n")
    .filter(Boolean)
    .map((line) => line.trim().split("="));
}

task("example", "Example task").setAction(example);
task("deploy", "Deploying Launchpad").setAction(deploy);
task("deploy2", "Deploying LaunchpadV2").setAction(deploy2);

// Ensure that we have all the environment variables we need.
const mnemonic = process.env.MNEMONIC;
if (!mnemonic) {
  throw new Error("Please set your MNEMONIC in a .env file");
}

const infuraApiKey = process.env.INFURA_API_KEY;
if (!infuraApiKey) {
  throw new Error("Please set your INFURA_API_KEY in a .env file");
}

function getChainConfig(chain: keyof typeof chainIds): NetworkUserConfig {
  let jsonRpcUrl: string;
  switch (chain) {
    case "avalanche":
      jsonRpcUrl = "https://api.avax.network/ext/bc/C/rpc";
      break;
    case "bsc":
      jsonRpcUrl = "https://bsc-dataseed1.binance.org";
      break;
    default:
      jsonRpcUrl = "https://" + chain + ".infura.io/v3/" + infuraApiKey;
  }
  return {
    accounts: {
      count: 10,
      mnemonic,
      path: "m/44'/60'/0'/0",
    },
    chainId: chainIds[chain],
    url: jsonRpcUrl,
  };
}

const config: HardhatUserConfig = {
  networks: {
    hardhat: {
      accounts: {
        mnemonic,
      },
      chainId: chainIds.hardhat,
    },

    goerli: getChainConfig("goerli"),
    kovan: getChainConfig("kovan"),
    rinkeby: getChainConfig("rinkeby"),
    ropsten: getChainConfig("ropsten"),
    mainnet: getChainConfig("mainnet"),
    mumbai: getChainConfig("mumbai"),
    polygon: getChainConfig("polygon"),
    optgoerli: getChainConfig("optgoerli"),
    arbgoerli: getChainConfig("arbgoerli"),
    optimism: getChainConfig("optimism"),
    sepolia: getChainConfig("sepolia"),
    bsc: getChainConfig("bsc"),
  },
  solidity: {
    version: "0.8.19",
    settings: {
      optimizer: {
        enabled: true,
        runs: 200,
      },
    },
  },
  paths: {
    sources: "./src", // Use ./src rather than ./contracts as Hardhat expects
    cache: "./cache_hardhat", // Use a different cache for Hardhat than Foundry
  },
  etherscan: {
    apiKey: {
      arbitrumOne: process.env.ARBISCAN_API_KEY || "",
      avalanche: process.env.SNOWTRACE_API_KEY || "",
      bsc: process.env.BSCSCAN_API_KEY || "",
      mainnet: process.env.ETHERSCAN_API_KEY || "",
      optimisticEthereum: process.env.OPTIMISM_API_KEY || "",
      polygon: process.env.POLYGONSCAN_API_KEY || "",
      polygonMumbai: process.env.POLYGONSCAN_API_KEY || "",
      sepolia: process.env.ETHERSCAN_API_KEY || "",
      goerli: process.env.ETHERSCAN_API_KEY || "",
    },
  },
  // This fully resolves paths for imports in the ./lib directory for Hardhat
  preprocess: {
    eachLine: (hre) => ({
      transform: (line: string) => {
        if (line.match(/^\s*import /i)) {
          getRemappings().forEach(([find, replace]) => {
            if (line.match(find)) {
              line = line.replace(find, replace);
            }
          });
        }
        return line;
      },
    }),
  },
};

export default config;