hardhat.config.js

require("dotenv").config()

require("hardhat-contract-sizer")
require("@nomiclabs/hardhat-waffle")
require("solidity-coverage")
require("hardhat-gas-reporter")
require("hardhat-deploy")
require("hardhat-deploy-ethers")
require("./tasks")

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)
    }
})

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

    const mnemonic = process.env.MNEMONIC
    if (!mnemonic || mnemonic === "") {
        return [process.env.PRIVATE_KEY]
    }
    return { mnemonic: mnemonic }
}

function accounts(chainKey) {
    return getMnemonic(chainKey)
}

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

/**
 * @type import('hardhat/config').HardhatUserConfig
 */
module.exports = {
    solidity: {
        compilers: [
            {
                version: "0.8.4",
                settings: {
                    optimizer: {
                        enabled: true,
                        runs: 30000,
                    },
                },
            },
        ],
    },
    contractSizer: {
        alphaSort: false,
        runOnCompile: true,
        disambiguatePaths: false,
    },

    namedAccounts: {
        deployer: {
            default: 0, // wallet address 0, of the mnemonic in .env
        },
    },

    networks: {
        rinkeby: {
            url: "https://rinkeby.infura.io/v3/",
            chainId: 4,
            accounts: accounts(),
        },
        "bsc-testnet": {
            url: "https://data-seed-prebsc-1-s1.binance.org:8545/",
            chainId: 97,
            accounts: accounts(),
        },
        fuji: {
            url: `https://api.avax-test.network/ext/bc/C/rpc`,
            chainId: 43113,
            accounts: accounts(),
        },
        mumbai: {
            url: "https://rpc-mumbai.maticvigil.com/",
            chainId: 80001,
            accounts: accounts(),
        },
        "arbitrum-rinkeby": {
            url: `https://rinkeby.arbitrum.io/rpc`,
            chainId: 421611,
            accounts: accounts(),
        },
        "optimism-kovan": {
            url: `https://kovan.optimism.io/`,
            chainId: 69,
            accounts: accounts(),
        },
        "fantom-testnet": {
            url: `https://rpc.testnet.fantom.network/`,
            chainId: 4002,
            accounts: accounts(),
        },
    },
}