Error: ENOENT: no such file or directory, Lesson 9 & 10- creating abi and contract addresses from lesson 9 automatically

[Sugunaramkumar]

Following lesson 10, I am in timeframe 17.35, when I give yarn hardhat node, error coming as

Error: ENOENT: no such file or directory, open '.../next-js-sc-lottery/lottery/constants/contractAddresses.json'
at Object.openSync (node:fs:585:3)
at Object.readFileSync (node:fs:453:35)
at updateContractAddresses (C:\Users\sugun\Suguna-HH-new\Raffle-lottery-new\deploy\99-update-front-end.js:21:45)
at processTicksAndRejections (node:internal/process/task_queues:96:5)
at runNextTicks (node:internal/process/task_queues:65:3)
at listOnTimeout (node:internal/timers:528:9)
at processTimers (node:internal/timers:502:7)
error Command failed with exit code 1.

99-update-front-end.js

const { ethers } = require("hardhat")
const fs = require("fs")

const FRONT_END_ADDRESSES_FILE = "../next-js-sc-lottery/lottery/constants/contractAddresses.json"
const FRONT_END_ABI_FILE = "../next-js-sc-lottery/lottery/constants/abi.json"

module.exports = async function () {
    if (process.env.UPDATE_FRONT_END) {
        console.log("Updating front end....")
        updateContractAddresses()
        updateAbi()
    }
}
async function updateAbi() {
    const raffle = await ethers.getContract("Raffle")
    fs.writeFileSync(front_END_ABI_FILE, raffle.interface.format(ethers.utils.FormatTypes.json))
}

async function updateContractAddresses() {
    const raffle = await ethers.getContract("Raffle")
    const contractAddresses = JSON.parse(fs.readFileSync(FRONT_END_ADDRESSES_FILE, "utf8"))
    if (network.config.chainId.toString() in contractAddresses) {
        if (!contractAddresses[network.config.chainId.toString()].includes(raffle.address)) {
            contractAddresses[network.config.chainId.toString()].push(raffle.address)
        }
    } else {
        contractAddresses[network.config.chainId.toString()] = [raffle.address]
    }
    fs.writeFileSync(FRONT_END_ADDRESSES_FILE, JSON.stringify(contractAddresses))
}
module.exports.tags = ["all", "frontend"]

attaching another screenshot to show the file name in lesson 10

someone help please!

[othaime-en]

Try and remove the extra dot (.) in these two lines

.../next-js-sc-lottery/lottery/constants/contractAddresses.json
.../next-js-sc-lottery/lottery/constants/abi.json

Accessing a file normally uses two dots (..) So they should be

../next-js-sc-lottery/lottery/constants/contractAddresses.json
../next-js-sc-lottery/lottery/constants/abi.json

[Sugunaramkumar]

Ok I will do that

[othaime-en]

Have you tried moving two directories upwards? Like This?

../../next-js-sc-lottery/lottery/constants/contractAddresses.json
../../next-js-sc-lottery/lottery/constants/abi.json

[Sugunaramkumar]

I tried it, the error is same. Here are the links of repo Lesson 9 and 10

• https://github.com/Sugunaramkumar/Next-js-smartcontract-lottery.git
• https://github.com/Sugunaramkumar/Raffle-Lottery.git

[othaime-en]

Hey @Sugunaramkumar the main problem here is that the path to your two files is incorrect. I'd need to have the correct directory structure to give you the correct path. From the pictures above, I'm guessing your two project folders (next-js-sc-lottery and Raffle-lottery-new) are not on the same parent directory.
One way would be to add another ../ before the two paths so there is ../../../ in both lines
OR you could move both folders into the same parent directory and try the solution above about moving two directories backwards (../../) - I recommend this one.

[Sugunaramkumar]

Hi, Thank you so much for helping, last option worked.

[alymurtazamemon]

@Sugunaramkumar Hey! this throws an error because your lottery project did not find the location of the contractAddresses.json and abi.json files exactly. In the tutorial, Patrick uses it according to him, but you need to use it according to your project's structures.

[alymurtazamemon]

@Sugunaramkumar You can either do it yourself or let me know the exact folder structure where you both projects are.

[Sugunaramkumar]

@alymurtazamemon Hi Thanks for reply, I did use my project structure how I named it only, I did not use Patrick Sir's naming, I posted second screenshot image to show my naming structure look like in Lesson 10. I named my lesson 10 name as nextjs-sc-lottery/lottery. I have given my Lesson 9 and 10 repo links above. Could you help?

[alymurtazamemon]

@Sugunaramkumar see I mean where you have put all your projects or are these in a separate directories? Ex. my all projects are in a folder name called Blockchain and my both lottery backend and lottery frontend are in this folder.

[Sugunaramkumar]

Thank you. I get it. It was in two different folder. I used option two directories backwards, and it worked.

[zeitseeing]

To find the right folder structure you can also go to the hardhat-smartcontract-lottery-fcc/deploy folder in your terminal, where your 99-update-front-end.js is located and then use the cat command to see if you find the correct path to contractAddresses.json in the other directoy. Using tab you can autocomplete paths and let it guide you.

deploy (main) $ cat ../../nextjs-smartcontract-lottery-fcc/constants/contractAddresses.json