Lesson 13: Invalid value for hardhat.config.js

[naman1402]

This is my hardhat.config.js file

require("@nomiclabs/hardhat-waffle")
require("@nomiclabs/hardhat-etherscan")
require("hardhat-deploy")
require("solidity-coverage")
require("hardhat-gas-reporter")
require("hardhat-contract-sizer")
require("dotenv").config()

const POLYGON_MUMBAI_RPC_URL = process.env.POLYGON_RPC_URL
const PRIVATE_KEY = process.env.PRIVATE_KEY
const ETHERSCAN_KEY = process.env.ETHERSCAN_KEY
const ETH_MAINNET_RPC_URL = process.env.ETH_MAINNET_RPC_URL

/**
 * @type import('hardhat/config').HardhatUserConfig
 *
 */
module.exports = {
    defaultNetwork: "hardhat",
    networks: {
        hardhat: {
            chainId: 31337,
            forking: {
                url: ETH_MAINNET_RPC_URL,
            },
        },
        localhost: {
            chainId: 31337,
        },
        polygon_mumbai: {
            url: POLYGON_MUMBAI_RPC_URL,
            accounts: [PRIVATE_KEY],
            chainId: 80001,
            blockConfirmations: 6,
        },
    },
    solidity: {
        compilers: [
            { version: "0.8.8" },
            { version: "0.4.19" },
            { version: "0.6.12" },
        ],
    },
    etherscan: {
        apiKey: ETHERSCAN_KEY,
    },
    namedAccounts: {
        deployer: {
            default: 0,
            1: 0,
        },
    },
}

and the output I get is

Error HH8: There's one or more errors in your config file:

  * Invalid value {"chainId":31337,"forking":{}} for HardhatConfig.networks.hardhat - Expected a value of type HardhatNetworkConfig.

To learn more about Hardhat's configuration, please go to https://hardhat.org/config/

[alymurtazamemon]

@NamanMohnani Make sure you networks config in hardhat.config.js file, it looks correct maybe you are using the old hardhat-waffle dependency, try upgrading it to hardhat-toolbox and see.

You can see the guide here Migrating away from hardhat-waffle

[naman1402]

@alymurtazamemon I installed @nomicfoundation/hardhat-toolbox but I am still having the same issue

[alymurtazamemon]

@NamanMohnani Give me your repository link.

[naman1402]

@alymurtazamemon Here it is
https://github.com/NamanMohnani/defi-hardhat

[lucassusanto]

I have the same issue