Lesson 7: TypeError property 'blockConfirmations' does not exist on type 'HardhatNetworkConfig'

[RowinVanAmsterdam]

I'm using TypeScript and got two typeErrors when I want to set the block confirmation in hardhat.config.ts and 01-deploy-fund-me.

The error in hardhat.config.ts:

Type '{ url: string; accounts: string[]; chainId: number; blockConfirmations: number; }' is not assignable to type 'NetworkUserConfig | undefined'.
  Object literal may only specify known properties, and 'blockConfirmations' does not exist in type 'NetworkUserConfig'.

As you can see in the code below the error appears because I use the type HardhatUserConfig. If I change it to any the error is gone. But I still got the error in the 01-deploy-fund-me file. If I'm not mistaken the type HardhatUserConfig should be correct, see also the example in hardhat documentation.

hardhat.config.ts

import { HardhatUserConfig } from "hardhat/config";
import "@nomicfoundation/hardhat-toolbox";
import "dotenv/config";
import "@nomiclabs/hardhat-etherscan";
import "./tasks/block-number";
import "hardhat-gas-reporter";
import "solidity-coverage";
import "@typechain/hardhat";
import "hardhat-deploy";

// This adds support for typescript paths mappings
import "tsconfig-paths/register";

const GOERLI_RPC_URL = process.env.GOERLI_RPC_URL!;
const PRIVATE_KEY = process.env.PRIVATE_KEY!;
const ETHERSCAN_API_KEY = process.env.ETHERSCAN_API_KEY!;
const COINMARKETCAP_API_KEY = process.env.COINMARKETCAP_API_KEY!;

const config: HardhatUserConfig = {
    solidity: {
        compilers: [{ version: "0.8.9" }, { version: "0.6.6 " }],
    },
    defaultNetwork: "hardhat",
    networks: {
        goerli: {
            url: GOERLI_RPC_URL,
            accounts: [PRIVATE_KEY],
            chainId: 5,
            blockConfirmations: 6,   <----- Error is on this line
        },
        localhost: {
            url: "http://127.0.0.1:8545/",
            chainId: 31337,
        },
    },
    etherscan: {
        apiKey: ETHERSCAN_API_KEY,
    },
    gasReporter: {
        enabled: true,
        outputFile: "./generated/gas-report.txt",
        noColors: true,
        currency: "USD",
        coinmarketcap: COINMARKETCAP_API_KEY,
    },
    namedAccounts: {
        deployer: {
            default: 0,
        },
    },
};

export default config;

The error in 01-deploy-fund-me:

Property 'blockConfirmations' does not exist on type 'NetworkConfig'.
  Property 'blockConfirmations' does not exist on type 'HardhatNetworkConfig'.

01-deploy-fund-me

import { network } from "hardhat";
import {developmentChains, networkConfig} from "../helper-hardhat-config";
import { verify } from "../utils/verify";

module.exports = async ({ getNamedAccounts, deployments }: any) => {
    const { deploy, log, get } = deployments;
    const { deployer } = await getNamedAccounts();
    const chainId = network.config.chainId!;
    let ethUsdPriceFeedAddress;

    if(developmentChains.includes(network.name)) {
        const ethUsdAggregator = await get("MockV3Aggregator");
        ethUsdPriceFeedAddress = ethUsdAggregator.address;
    } else {
        ethUsdPriceFeedAddress = networkConfig[chainId as keyof typeof networkConfig].ethUsdPriceFeed;
    }

    const args = [ethUsdPriceFeedAddress];
    const fundMe = await deploy("FundMe", {
        from: deployer,
        args: args,
        log: true,
        waitConfirmations: network.config.blockConfirmations || 1,   <------- error is on this line
    });

    if(!developmentChains.includes(network.name) && process.env.ETHERSCAN_API_KEY) {
        await verify(fundMe.address, args);
    }
    log("----------------------------------------------------");
};

module.exports.tags = ["all", "fundme"];

It seems like both errors are related to the missing type of blockConfirmations. Any idea what the right type is or what I did wrong?