Lesson 7: TypeError: Cannot read properties of undefined (reading 'ethUsdPriceFeed')

[JuniorSua]

This is the error I am getting,
TypeError: Cannot read properties of undefined (reading 'ethUsdPriceFeed')
I believe this is the line of code where it stops

else {
        ethUsdPriceFeedAddress = networkConfig[chainId]["ethUsdPriceFeed"]
    } 

I will attach the entire code here

// import
// main function
// calling main function

const { network } = require("hardhat")

// async function deployFunc() {
//     console.log("Hi!")
// }
// module.exports.default = deployFunc

// const helperConfig = require("../helper-......")
// const networkConfig = helperConfig.networkConfig
const { networkConfig, developmentChains } = require("../helper-hardhat-config")
const { verify } = require("../utils/verify")

module.exports = async ({ getNamedAccounts, deployments }) => {
    //const { getNamedAccounts, deployments } = hre
    // hre.getNamedAccounts
    // hre.deployments
    const { deploy, log } = deployments
    const { deployer } = await getNamedAccounts()
    const chainId = network.config.chainId

    // if chainId is X use address Y
    // if chainId is Z use address A
    // const ethUsdPriceFeedAddress = networkConfig[chainId]["ethUsdPriceFeed"]

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

    // if the contract doesn't exist, we deploy a minimal version of
    // for out local testing

    // well what happens when we want to change chains?
    // when going for localhost or hardhat network we want to use a mock
    log("---------------------------------------------------------")
    log("Deploying FundMe and waiting for confirmation...")
    const args = [ethUsdPriceFeedAddress]
    const fundMe = await deploy("FundMe", {
        from: deployer,
        args: args, // put price feed address
        log: true,
        waitConfirmations: network.config.blockConfirmation || 1,
    })

    if (
        !developmentChains.includes(network.name) &&
        process.env.ETHERSCAN_API_KEY
    ) {
        await verify(fundMe.address, args)
    }
    log("-------------------------------------------------------------")
}
module.exports.tags = ["all", "fundme"]

I have tried my best to solve it but I can not figure it out... Also i saw this error in other dicussions but none were able to help me with mine.... thank you in advance for helping me out

[othaime-en]

Hey @JuniorSua please share your helper-hardhat-config.js file.

[othaime-en]

Hey @JuniorSua there is an error in your hardhat.config.js You are using chainID instead of chainId That's what is causing the error.
Change chainID to chainId in both rinkeby and goerli networks

[JuniorSua]

Omg it worked for goerli thank you so much.... idk if it worked on your end but the rinkeby is not working... I am gettign this error
TypeError: Cannot read properties of undefined (reading 'length')
Let me know if you are also getting it. By the way this has taught me so much I really appreciate it, its making me a better debugger

[othaime-en]

Can you share the error you getting in your terminal

[JuniorSua]

TypeError: Cannot read properties of undefined (reading 'length')
Thats the error, it is in my hardhat.config.js I just copied paste the final version and it worked but I have to go over my code and see whats different. It is late over here so I am going to nap and check it out tomorrow. if you find it before I wake up thank you so much

[othaime-en]

Never mind, I found the error. it is in this section here:

namedAccounts: {
        deployer: {
            default: 0,
            4: 1,
        },
    },

You are assigning account at index 1 to deployer but your rinkeby accounts section aonly has one acount so either add another private key in the rinkeby accounts section or change 4:1 to 4:0 or delete the line 4:1 entirely