TypeError: vrfCoordinatorV2Mock.createSubsctiption is not a function

[mmuaaz]

const { network, ethers } = require("hardhat")
const { developmentChains, networkConfig } = require("../helper-hardhat.config")
const { verify } = require("../helper-hardhat.config")
const FUND_AMOUNT = "100000000000000000" //ethers.utils.parseEther("2")

module.exports = async ({ getNamedAccounts, deployments }) => {
    const { deploy, log } = deployments
    const { deployer } = await getNamedAccounts()
    const chainId = network.config.chainId
    let vrfCoordinatorV2Address, subsciptionId

    if (developmentChains.includes(network.name)) {
        const vrfCoordinatorV2Mock = await deployments.get("VRFCoordinatorV2Mock")
        vrfCoordinatorV2Address = vrfCoordinatorV2Mock.address
        const transactionResponse = await vrfCoordinatorV2Mock.createSubsctiption()
        const transactionReceipt = await transactionResponse.wait(1)
        subscriptionId = transactionReceipt.events[0].args.subId 
        await vrfCoordinatorV2Mock.fundSubscription(subscriptionId, FUND_AMOUNT)
    } else {
        vrfCoordinatorV2Address = networkConfig[chainId]["vrfCoordinatorV2"]
        const 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.blockConfitmations || 1,
    })
    if (!developmentChains.includes(network.name) && process.env.ETHERSCAN_API_KEY) {
        log("-------Verifying.... Please Wait !-------------")
        await verify(raffle.address, args)
    }
    log("--------------------------------------------------------------------------------")
}

module.exports.tags = ["all", "raffle"]`

Ok so i am getting error "TypeError: vrfCoordinatorV2Mock.createSubsctiption is not a function" with the code above. Now I had to make some adjustment as in the previous lesson we used
const vrfCoordinatorV2Mock = await deployments.get("VRFCoordinatorV2Mock")
"deployments.get" to get the latest deployements. Why I did this if you ask then If I use the current lesson 9 syntax here which is:

const vrfCoordinatorV2Mock = await ethers.getContract("VRFCoordinatorV2Mock")

the "getContract" piece is giving me this error:
TypeError: Cannot read properties of undefined (reading 'getContract')

So I am stuck now, I had searched the discussions for "getContract" error, I think nobody got this error so I had to change the code, may be I am missing some "imports" as I cant use command "ethers.utils.parseEther" as well. That thing is generating another error "TypeError: Cannot read properties of undefined (reading 'utils')". Please Help me out I am stuck and have no clue whats going on

[othaime-en]

Hey @mmuaaz there is a typo in your code. You've written vrfCoordinatorV2Mock.createSubsctiption()
It should be vrfCoordinatorV2Mock.createSubscription() (r instead of t)

[othaime-en]

Seems like there might be problems with your hardhat-deploy-ethers package. Check if you have it in your package.json file. It should be something along the lines of "@nomiclabs/hardhat-ethers": "npm:hardhat-deploy-ethers, if not, run the command below

yarn add --dev  @nomiclabs/hardhat-ethers@npm:hardhat-deploy-ethers ethers

If you have it, you can still run the command above, just to be sure you it is installed.

[mmuaaz]

Yes, bro I have this dependency installed, but this dependency might be the culprit which is giving me these errors

[othaime-en]

Try installing the beta version then as @alymurtazamemon has suggested.

yarn add --dev  @nomiclabs/hardhat-ethers@npm:hardhat-deploy-ethers@^0.3.0-beta.1 ethers

[mmuaaz]

didnt work bro, I tried getting "getContract" error

[othaime-en]

Let me check your repo then.

[alymurtazamemon]

@mmuaaz Replace these:

- const vrfCoordinatorV2Mock = await deployments.get("VRFCoordinatorV2Mock")
+ const vrfCoordinatorV2Mock = await ethers.getContract("VRFCoordinatorV2Mock");

- const transactionResponse = await vrfCoordinatorV2Mock.createSubsctiption() 
+ const transactionResponse = await vrfCoordinatorV2Mock.createSubscription();

[alymurtazamemon]

@mmuaaz let me check.

[alymurtazamemon]

@mmuaaz These were the issues:

1. Missing require things in hardhat.config.js file

require("@nomiclabs/hardhat-waffle")
require("@nomiclabs/hardhat-etherscan")
require("hardhat-gas-reporter")
require("solidity-coverage")
require("hardhat-deploy")
require("dotenv").config()

2. gasLane was set to blablabla instead set it to gasLane: "0xd89b2bf150e3b9e13446986e571fb9cab24b13cea0a43ea20a6049a85cc807cc",

3. callbackGasLimit: "500000", here value should be without any ,. It was set as this 500,000.

4. This code was placed inside the NamedAccounts object in hardhat file, it should be inside export object:

networks: {
    hardhat: {
        // // If you want to do some forking, uncomment this
        // forking: {
        //   url: MAINNET_RPC_URL
        // }
        chainId: 31337,
    },
    localhost: {
        chainId: 31337,
    },
    // goerli: {
    //     url: GOERLI_RPC_URL,
    //     accounts: [PRIVATE_KEY],
    //     chainId: 5,
    //     blockConfirmations: 6,
    // },
},

5. I removed the guide script from the deploy folder, this folder should only contain deploy scripts and all other things you can put in the root folder.

Now it is working!

[alymurtazamemon]

@mmuaaz going to push it, check your repo

[mmuaaz]

Ok so, I am new to this github as well, dont understand how this works, do I make these changes in my VisualStudioCode or github repo auto imports it?

[mmuaaz]

I think I have opened "pull request" you created with the name "fix issues" and I found you had suggested some changes, then I approved those changes by pressing "review changes" and selecting "approve" all of that resulted in resolving the problem just like that, so I guess that was a lot of typo @alymurtazamemon must have worked really hard for that, so grateful

[krakxn]

I made a PR, merge it and let me know if that fixes it.

[GlitzyM]

@alymurtazamemon the solution with the following fix worked for me

• const vrfCoordinatorV2Mock = await deployments.get("VRFCoordinatorV2Mock")

• const vrfCoordinatorV2Mock = await ethers.getContract("VRFCoordinatorV2Mock");

But I don't get why the deployments.get doesn't work. It works fine for the FundMe contract. Will you please explain?