lesson 7: Cannot read properties of undefined (reading 'length')

[tiwariji99]

i have tried to apply different codes mentioned in discussion tab but i am still getting this error

so i am attaching my codes below
01-deploy-fund-me.js

const {network}=require("hardhat");
 const{networkConfig,developmentChains}=require("../helper-hardhat-config");
 const{verify}=require("../utils/verify")
 require("dotenv").config();
 const {deployments}=require('hardhat-deploy');
 module.exports=async({getNamedAccounts,deployments})=>{
    //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(chainId==31337){
        const ethUsdAggregator= await deployments.get("MockV3Aggregator")
        ethUsdPriceFeedAddress=ethUsdAggregator.address
    }
    else{
        ethUsdPriceFeedAddress= networkConfig[chainId]["ethUsdPriceFeed"]
    }
    // if contract doesnt exist, we deploy a minimal version for our local testing

    //when going for localhost or hardhat network we want to use a mock
    const args=[ethUsdPriceFeedAddress]
    const fundme= await deploy("Fundme",{
        from: deployer,
        args:args,
        log:true,
        waitConfirmations: network.config.blockConformations|| 1,
    })
  

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


    log("------------------------------------------")
}
module.exports.tags=["all","fundme"]

00-deploy-mocks.js

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

if(chainId==31337){
    log("local network 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"]

hardhat-config.js

require("@nomiclabs/hardhat-ethers");
require("@nomiclabs/hardhat-etherscan");
require("hardhat-gas-reporter");
require("solidity-coverage");
require("hardhat-deploy");

/** @type import('hardhat/config').HardhatUserConfig */

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

module.exports = {
  solidity:{
    compilers : [{version:"0.8.8"},{version:"0.6.6"}],
  },
  defaultNetwork: "hardhat",
  networks : {
    goerli : {
      url: GOERLI_RPC_URL,
      accounts: [PRIVATE_KEY],
      chainId:5,
      blockConfirmations: 6,
    },
  
  },
  
  gasReporter: {
     enabled: false,
     currency: "USD",
     outputFile : "gas-report.txt",
     noColors: true,
     coinmarketcap:COINMARKETCAP_API_KEY,
     token:"MATIC",
  },
  etherscan: {
    apikey:process.env.ETHERSCAN_API_KEY,
  },
    namedAccounts: {
      deployer : {
        default:0,
      
      },
      user: {
        default:1,
      },
    },
   
  
};

helper-hardhat-config.js

    5: {
        name:"goerli",
        ethUsdPriceFeed :"0xD4a33860578De61DBAbDc8BFdb98FD742fA7028e",
    },
137:{
    name:"polygon",
    ethUsdPriceFeed:"0xF9680D99D6C9589e2a93a78A04A279e509205945",
},
  
};
const developmentChains=["hardhat","localhost"]
const DECIMALS=8
const INITIAL_ANSWER=200000000000
module.exports={
    networkConfig,
    developmentChains,
    DECIMALS,
    INITIAL_ANSWER,
}```

.env 

```GOERLI_RPC_URL= https://eth-goerli.g.alchemy.com/v2/cLBDR5P0T_043OCEg8fFKqIrG2NTEJkj
PRIVATE_KEY=416f2021aba89f5bc008fff4500d0ed899b22b378022a9532646919529d8ed57
ETHERSCAN_API_KEY=32J7HBDQDQ774MMJHSFJ39XE1JY1ZGK7U8
COINMARKETCAP_API_KEY=301f89c6-3da4-4795-899a-988b18589f97

[paulcoffee85]

in hardhat-config: You are missing:
require("dotenv").config()

Also: check your package.json, make sure it's installed and showing in dependencies.

[paulcoffee85]

Your verify file:

contractaddress should be contractAddress
and no spaces in await run("verify:verify"<==

if those don't resolve all issues, try changing function as well:
async function verify(contractaddress,args){ instead try const verify = async (contractAddress, args) => {

[tiwariji99]

sorry to continuosly bothering you but i am still getting the error. please help me out with this

[paulcoffee85]

It's no problem, helps with learning along the way.
Can you push your project up to github ? I can see everything and test the file.

[tiwariji99]

i tried and it gets cleared . thanks a lot for your efforts

[Devansh-Mehra]

hey @tiwariji99 , I am also facing this error while going through thus course and not able to find a solution to this problem can u help and tell how did you resolved this issue ?