Lesson7: Cannot find module './helper-hardhat-config'

[harshk106]

Hey, I am getting this error and I am not able to understand where is the mistake I did.
My helper-hardhat-config.js file is in the same directory as hardhat.config file.
Here is the error:

An unexpected error occurred:

Error: ERROR processing skip func of /home/harshkk/hh-fcc/hardhat-fund-me/deploy/00-deploy-mocks.js:
Error: Cannot find module './helper-hardhat-config

.
.

Here is my code snippet of 01-deploy-fund-me code:

const { networkConfig } = require("../helper-hardhat-config")
const { network } = require("hardhat")
const { verify } = require("../utils/verify")
const { WeiPerEther } = require("ethers")

@alymurtazamemon

[Alanle1011]

I think that you in your "00-deploy-mocks.js", you missing a ".(dot)" on the "require("../helper-hardhat-config")"

[harshk106]

Thank you!

[Mericbey167]

Yeah, agreed with Alanle1011 . Check your file-folder structure one more time. If you put one dot in require you mean you're looking for it at same folder. But you need to go outside of your deploy folder by putting two dots in order to reach "helper-hardhat-config"

[harshk106]

Yes, got it. Thanks!
But now I am getting an error :

Error: ERROR processing /home/harshkk/hh-fcc/hardhat-fund-me/deploy/01-deploy-fund-me.js:
ReferenceError: developmentChains is not defined
 at Object.module.exports [as func] (/home/harshkk/hh-fcc/hardhat-fund-me/deploy/01-deploy-fund-me.js:31:5)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)

Here is my "00-deploy-mocks.js" code:

const { network } = require("hardhat")
const {
    developmentChains,
    DECIMALS,
    INITIAL_ANSWER,
} = require("../helper-hardhat-config")

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

    if (developmentChains.includes(network)) {
        log("local ntw detected! Deploying mocks...")
        await deploy("MockV3Aggregator", {
            contract: "MockV3Aggregator",
            from: deployer,
            log: true,
            args: [DECIMALS, INITIAL_ANSWER],
        })
        log("Mocks deployed.")
        log("------------------------------------------")
    }
}

module.exports.tags = ["all", "mocks"]

My "helper-hardhat-config.js" code:

const networkConfig = {
    31337: {
        name: "localhost",
    },

    // Price Feed Address, values can be obtained at https://docs.chain.link/data-feeds/price-feeds/addresses
    11155111: {
        name: "sepolia",
        ethUsdPriceFeed: "0x694AA1769357215DE4FAC081bf1f309aDC325306",
    },
}

const developmentChains = ["hardhat", "localhost"]
const DECIMALS = 8
const INITIAL_ANSWER = 200000000000

console.log(developmentChains, DECIMALS, INITIAL_ANSWER)

module.exports = {
    networkConfig,
    developmentChains,
    DECIMALS,
    INITIAL_ANSWER,
}

[Mericbey167]

According to what error code says, that error showed up at "01-deploy-fund-me.js" which you didn't provide above. Seems like you've forgotten to implement your "developmentChains" variable from your "helper-hardhat-config". Simply import it with

const { developmentChains } = require("../helper-hardhat-config")

And if this doesn't fix your issue please provide your "01-deploy-fund-me" file so i can check :)

[harshk106]

oh yes I found my mistake. Thank you

[harshk106]

here is my "01-deploy-fund-me.js":

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

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

    //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"]
    }

    const args = [ethUsdPriceFeedAddress]
    const fundMe = await deploy("FundMe", {
        from: deploy, //who is deploying
        args: args, //[put pricefeed address]
        log: true,
        waitConfirmations: network.config.blockConfirmations || 1,
    })

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

    log("----------------------------------------")
}

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

Now I am getting error :

Error: ERROR processing /home/harshkk/hh-fcc/hardhat-fund-me/deploy/01-deploy-fund-me.js:
TypeError: from.toLowerCase is not a function

[Mericbey167]

I'm not sure where you used toLowerCase but it should be "toLowerCase()". With the parantheses.
Also i noticed that you miss spelled the deployer.

const fundMe = await deploy("FundMe", {
        from: deployer , //who is deploying
        args: args, //[put pricefeed address]
        log: true,
        waitConfirmations: network.config.blockConfirmations || 1,
    })

From: deployer
Like you said it's person who is deploying this contract. Deploy is the function that deploys the contract.

[harshk106]

Yes got it, the error got corrected and its finally running. Thank you so much for your help. Will note these mistakes!

And yes the "toLowerCase()" was with the paranthesis and it was in the node_modules/hardhat-deploy/src/helpers.ts. So i actually did not understood why that error popped? should i attach that code?

[Mericbey167]

I'm not sure why the error message said that but i guess hardhat tried to run "deploy" instead of "deployer". Because you were put deploy here previously. So hardhat tried to run deploy function one more time and somewhere in hardhat-deploy package, toLowerCase didn't worked out. That's why error message said it i guess.
I'm glad we figured them out :)

[harshk106]

yep, thank you once again!