hardhat.config.js

require("@nomiclabs/hardhat-waffle");
require("@nomiclabs/hardhat-truffle5");
require("@nomiclabs/hardhat-etherscan");

const fs = require('fs');
require('dotenv').config()

/**
 *
 * @param {string} key
 * //Function to get value from env
 */
function getEnv(key) {
	return [key];
}

// 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 () => {
	const accounts = await ethers.getSigners();

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

// API_KEY & PRIVATE_KEY
const RINKEBY_RPC_URL = process.env.RINKEBY_RPC_URL || "https://eth-rinkeby.alchemyapi.io/v2/your-api-key"
const MATICMUM_RPC_URL = process.env.MATICMUM_RPC_URL || "https://rpc-mumbai.maticvigil.com"
const MNEMONIC = process.env.MNEMONIC || "mnemonic"
const ETHERSCAN_API_KEY = process.env.ETHERSCAN_API_KEY || "Etherscan API key"
// optional
const PRIVATE_KEY = process.env.PRIVATE_KEY || "wallet private key"

/**
 * @type import('hardhat/config').HardhatUserConfig
 */
module.exports = {
	solidity: {
		version: "0.8.11",
		settings: {
			optimizer: {
				enabled: false,
				runs: 200
			}
		}
	},
	defaultNetwork: "hardhat",
	networks: {
		hardhat: {
		},
		rinkeby: {
			url: RINKEBY_RPC_URL,
			accounts: {
				mnemonic: MNEMONIC,
			},
		},
		maticmum: {
			url: MATICMUM_RPC_URL,
			//accounts: [`0x${ETH_PRIVATE_KEY}`],
			accounts: {
				mnemonic: MNEMONIC,
			},
		}
	},
	etherscan: {
		apiKey: ETHERSCAN_API_KEY
	},
	paths: {
		sources: "./contracts",
		tests: "./test",
		cache: "./cache",
		artifacts: "./artifacts"
	},
	mocha: {
		timeout: 20000
	}
};