hardhat.config.ts

import fs from "fs";
import "@nomiclabs/hardhat-waffle";
import "@typechain/hardhat";
import "@nomiclabs/hardhat-etherscan";
import "hardhat-deploy";
import "hardhat-tracer";
import "hardhat-gas-reporter"
import "hardhat-preprocessor";
import { HardhatUserConfig, task } from "hardhat/config";
import { config as dotEnvConfig } from "dotenv";

import example from "./tasks/example";

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

task("example", "Example task").setAction(example);

dotEnvConfig();

const { INFURA_TOKEN, PRIVATE_KEY, ETHERSCAN_API_KEY } = process.env;

const config: HardhatUserConfig = {
  solidity: {
    version: "0.8.13",
    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
  },
  networks: {
    goerli: {
      url: `https://goerli.infura.io/v3/b018016af5c445d493f43914d5a479c9`,
      accounts: PRIVATE_KEY
        ? [PRIVATE_KEY]
        : {
            mnemonic:
              "test test test test test test test test test test test junk",
          },
    },
    mainnet: {
      url: `https://mainnet.infura.io/v3/${INFURA_TOKEN}`,
      accounts: PRIVATE_KEY
        ? [PRIVATE_KEY]
        : {
            mnemonic:
              "test test test test test test test test test test test junk",
          },
    },
    hardhat: {
      blockGasLimit: 9500000,
      chainId: 1,
      forking: {
        url: `https://eth-mainnet.alchemyapi.io/v2/${process.env.ALCHEMY_KEY}`,
        blockNumber: 16241092,
      },
      initialBaseFeePerGas: 5,
    },
    coverage: {
      url: "http://127.0.0.1:8555",
    },
  },
  etherscan: {
    apiKey: ETHERSCAN_API_KEY,
  },
  mocha: {
    timeout: 100000000
  },
  // 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;