hardhat.config.ts

import "dotenv/config";
import "hardhat-deploy";
import "hardhat-deploy-ethers";
import { HardhatUserConfig } from "hardhat/types";
import "solidity-coverage";
import "@nomiclabs/hardhat-etherscan";
import "@symfoni/hardhat-react";
import "hardhat-gas-reporter";

// * due to auto-generation the tests run much slower
// * unless this becomes opt-in, remove the comment out
// * to generate the new types
// * relating github issue: https://github.com/rhlsthrm/hardhat-typechain/issues/12
import "hardhat-typechain";
import "@typechain/ethers-v5";

function node_url(networkName: string): string {
  if (networkName) {
    const uri = process.env["ETH_NODE_URI_" + networkName.toUpperCase()];
    if (uri && uri !== "") {
      return uri;
    }
  }

  let uri = process.env.ETH_NODE_URI;
  if (uri) {
    uri = uri.replace("{{networkName}}", networkName);
  }
  if (!uri || uri === "") {
    // throw new Error(`environment variable "ETH_NODE_URI" not configured `);
    return "";
  }
  if (uri.indexOf("{{") >= 0) {
    throw new Error(
      `invalid uri or network not supported by nod eprovider : ${uri}`
    );
  }
  return uri;
}

function getMnemonic(networkName?: string): string {
  if (networkName) {
    const mnemonic = process.env["MNEMONIC_" + networkName.toUpperCase()];
    if (mnemonic && mnemonic !== "") {
      return mnemonic;
    }
  }

  const mnemonic = process.env.MNEMONIC;
  if (!mnemonic || mnemonic === "") {
    return "test test test test test test test test test test test junk";
  }
  return mnemonic;
}

function accounts(networkName?: string): { mnemonic: string } {
  return { mnemonic: getMnemonic(networkName) };
}

const config: HardhatUserConfig = {
  solidity: {
    version: "0.8.6",
    settings: {
      optimizer: {
        enabled: true,
        runs: 200,
      },
    },
  },
  namedAccounts: {
    deployer: 0,
    beneficiary: 1,
    lender: 2,
    renter: 3,
  },
  networks: {
    kovan: {
      url: node_url("kovan"),
      accounts: accounts(),
      gas: 6_000_000,
    },
    rinkeby: {
      url: node_url("rinkeby"),
      accounts: accounts(),
      gas: 6_000_000,
    },
    ropsten: {
      url: node_url("ropsten"),
      accounts: accounts(),
      gas: 6_000_000,
    },
    goerli: {
      url: node_url("goerli"),
      accounts: accounts(),
      gas: 6_000_000,
      gasPrice: 50000000000,
    },
    hardhat: {
      accounts: accounts(),
    },
    localhost: {
      url: "http://localhost:8545",
      accounts: accounts(),
    },
    // mainnet: {
    //   url: "https://eth-mainnet.alchemyapi.io/v2/<apiKey>",
    //   // to have a private key, just pass it in an array like so: ["0xprivKey"]
    //   accounts: ["<privKey>"],
    // },
  },
  paths: {
    sources: "src",
  },
  mocha: {
    timeout: 0,
  },
  gasReporter: {
    currency: "USD",
  },
};

export default config;