Lesson 9: Error deploying "VRFCoordinatorV2Mock" and creating Subscription

[AGMASO]

Hello dear colleagues!

I'm following the Lesson 9, and I'm having an Issue with the deployment of the VRFCoordinatorV2Mock, the creation of the Subscription and Funding the Subscription.

My Contract look like that:

if (chainId == 31337) {
    VRFCoordinatorV2Mock = await ethers.getContractFactory(
      "VRFCoordinatorV2Mock"
    );
    VRFCoordinatorV2Address = VRFCoordinatorV2Mock.address;
    //Crear subcription en mock

    const transactionResponse = await VRFCoordinatorV2Mock.createSubscription(); 
    const transactionReceipt = await transactionResponse.wait(1);
    subscriptionId = transactionReceipt.events[0].args.subId;

The fuction createSubscription(), is taken from the Smartcontract VRFCoordinatorV2Mock, but somehow i'm getting all the time this error:

TypeError: VRFCoordinatorV2Mock.createSubscription is not a function

Later on I have other piece of code similar but with other Function.

//Fund the subscription we just created.
    await VRFCoordinatorV2Mock.fundSubscription(
      subscriptionId,
      VRF_SUBSCRIPTION_AMOUNT
    );

So for me the problem is clear that somehow is not getting the functions from VRFCoordinatorV2Mock, but I don't know how to resolve the issue.

Could you help me?

Thank you

[Benrockiee]

Did u import "VRFCoordinatorV2Mock"?

import "@chainlink/contracts/src/v0.8/mocks/VRFCoordinatorV2Mock.sol";

[AGMASO]

But this Import statement is for Solidity. I'm in the Deploy folder in a JS file.

[Benrockiee]

Can u push your repo here so me and others can look for this error

[AGMASO]

Hello Ben!

Here you can see the code pushed to github
https://github.com/AGMASO/Error-with-mock-functions

Actually where i have the problem is in the 01-deploy-Lottery.js
https://github.com/AGMASO/Error-with-mock-functions/blob/main/deploy/01-deploy-Lottery.js

I hope you guys can find why is not working.

Thank you!

[AGMASO]

Hello! I have solved the problem. It was an Issue related to the Dependencies. It looks like I had few plugins incompatible between them, and the "@nomiclabs/hardhat-ethers": "npm:hardhat-deploy-ethers" was not working properly.

For that reason, I couldn't use the .getContract method, but also the process to use functions from VRFCoordinatorV2Mock was not working. Now it is working perfectly.

About the dependencies, I did another mistake, where I installed everything using YARN but few things using NPM. I guess this was causing the problem.

I let here this answer, maybe can help someone.

See you!

[Benrockiee]

@AGMASO Alright bro, sorry i haven't been here cos of power outage in my area and coming on here was a bit of a challenge, i'm Glad you resolved it.. You can mark your answer!

[AGMASO]

Hello! I have solved the problem. It was an Issue related to the Dependencies. It looks like I had few plugins incompatible between them, and the "@nomiclabs/hardhat-ethers": "npm:hardhat-deploy-ethers" was not working properly.

For that reason, I couldn't use the.getContractmethod, but also the process to use functions from VRFCoordinatorV2Mock was not working. Now it is working perfectly.

About the dependencies, I did another mistake, where I installed everything using YARN but few things using NPM. I guess this was causing the problem.

I let here this answer, maybe can help someone.

See you!