Lesson 9: Cannot read properties of undefined(reading 'entranceFee')

[paulcoffee85]

I've looked through all the code , couldn't find issue with any of the "entranceFee " methods. Am I missing line of code or is it export related or what ?

Terminal: hh deploy

Result:
Error: ERROR processing /root/hh-fcc/hardhat-smartcontract-lottery-fcc/deploy/01-deploy-raffle.js: TypeError: Cannot read properties of undefined (reading 'entranceFee') at Object.module.exports [as func] (/root/hh-fcc/hardhat-smartcontract-lottery-fcc/deploy/01-deploy-raffle.js:27:47)

01-deploy-raffle.js

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

const VRF_SUB_FUND_AMOUNT = ethers.utils.parseEther("30")

module.exports = async function ({ getNamedAccounts, deployments }) {
    const { deploy, log } = deployments
    const { deployer } = await getNamedAccounts()
    const chainId = network.config.chainId["VRFCoordinatorV2Mock"]
    let vrfCoordinatorV2Address, suscriptionId

    if (developmentChains.includes(network.name)) {
        const vrfCoordinatorV2Mock = await ethers.getContract("VRFCoordinatorV2Mock")
        vrfCoordinatorV2Address = vrfCoordinatorV2Mock.address
        const transactionResponse = await vrfCoordinatorV2Mock.createSubscription()
        const transactionReceipt = await transactionResponse.wait(1)
        subscriptionId = transactionReceipt.events[0].args.subId
        // Fund the subscription
        // Usually, you'd need the link toke on a real network
        await vrfCoordinatorV2Mock.fundSubscription(subscriptionId, VRF_SUB_FUND_AMOUNT)
    } else {
        vrfCoordinatorV2Address = networkConfig[chainId]
        subscriptionId = networkConfig[chainId]["subscriptionId"]
    }

    const entranceFee = networkConfig[chainId]["entranceFee"]
    const gasLane = networkConfig[chainId]["gasLane"]
    const callbackGasLimit = networkConfig[chainId]["callbackGasLimit"]
    const interval = networkConfig[chainId]["interval"]

    const args = [
        vrfCoordinatorV2Address,
        entranceFee,
        gasLane,
        subscriptionId,
        callbackGasLimit,
        interval,
    ]
    const raffle = await deploy("Raffle", {
        from: deployer,
        args: args,
        log: true,
        waitConfirmations: network.config.blockConfirmations || 1,
    })
    if (!developmentChains.includes(network.name) && process.env.ETHERSCAN_API_KEY) {
        log("Verifying...")
        await verify(raffle.address, args)
    }
    log("------------------------------------------------")
}
module.exports.tags = ["all", "raffle"]```

[krakxn]

Show helper hardhat config

[DorianDaSilva]

Hi @paulcoffee85

• Missing import at the top:

const { network, ethers } = require("hardhat") => You can't call ethers functions without importing ethers

• Define chainId correctly :

const chainId = network.config.chainId instead of const chainId = network.config.chainId["VRFCoordinatorV2Mock"]
=> "VRFCoordinatorV2Mock" is not a network

Hope this helps!

[paulcoffee85]

Thank you very much. Can't believe I missed that. 🤦‍♂️

This line of code was missing from my posted file.
const { deployments, network, ethers } = require("hardhat")

Problem was in my helper-hardhat-config.js file.
I had const {ethers} = require ("hardhat") instead of const {network , ethers} = require("hardhat") in my herlper-hardhat-config.js file

[DuyVo96]

Can you show me your herlper-hardhat-config.js file? I got the same issue with you.

const { network, ethers } = require("hardhat")

const networkConfig = {
    5: {
        name: "goerli",
        vrfCoordinatorV2: "0x2Ca8E0C643bDe4C2E08ab1fA0da3401AdAD7734D",
        entranceFee: ethers.utils.parseEther("0.01"),
        gasLane: "0x79d3d8832d904592c0bf9818b621522c988bb8b0c05cdc3b15aea1b6e8db0c15",
        subscriptionId: "0",
        callbackGasLimit: "500000",
        interval: "30",
    },
    31377: {
        name: "hardhat",
        entranceFee: ethers.utils.parseEther("0.01"),
        gasLane: "0x79d3d8832d904592c0bf9818b621522c988bb8b0c05cdc3b15aea1b6e8db0c15",
        callbackGasLimit: "500000",
        interval: "30",
    },
}

const developmentChains = ["hardhat", "localhost"]

module.exports = {
    networkConfig,
    developmentChains,
}

[othaime-en]

Hey @DuyVo96 please open a new question. Explain the error you are getting in detail and share you deploy script and this helper-hardhat.config file.