Lesson 9: error running tests - await raffle.performUpkeep("0x")

[DorianDaSilva]

Error: VM Exception while processing transaction: reverted with custom error 'InvalidConsumer()'

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Environment:

• Hardhat
• Ethers
• VsCode

Dependencies:

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

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Replicate the error:

| Run yarn hardhat test on this repo https://github.com/DorianDaSilva/DebbugingRaffle

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Problem:

| Tests containing await raffle.performUpkeep([])- (Chainlink Keepers) break when reaching this line. No solution found so far after several days of research & collaboration (See Github discussion: #779).

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Any help is welcome. Thank you!

[alymurtazamemon]

@DorianDaSilva Did you check this one: #359

[DorianDaSilva]

@ali-thegilfoyle I just did but this isn't the problem as you can tell from my checkUpkeep() code block below

    {
        bool isOpen = (RaffleState.OPEN == s_raffleState);
        bool timePassed = ((block.timestamp - s_lastTimeStamp) > i_interval);
        bool hasPlayers = (s_players.length > 0);
        bool hasBalance = address(this).balance > 0;
        upkeepNeeded = (isOpen && timePassed && hasPlayers && hasBalance);
        return (upkeepNeeded, "0x0");
    }

It is driving me absolutely crazy! Compared every file from the course repo (including config) to mine 1 by 1 and still couldn't figure out the issue.

[krakxn]

I think by now you would have tried various solutions, if so: just clone the repo from the full course and check if there is still an error. Let me know how it goes

[DorianDaSilva]

I appreciate the suggestion but it would defeat the purpose of even taking the course. I am not interestedd in cloning a repo if I don't understand how to write or fix tests properly. The day I don't have a course or repo I won't be able to just clone it, I will need to fix it.

That's why I am here, to learn how to become a blockchain/Web3 developer...Just hoping more experienced developers could help me get unstuck and learn in the process.

I will keep trying and if by the end of the lesson no solution is found I will most likely try to clone the repo in a new folder but honestly hope a solution to fix the error performUpkeep([ ]) is throwing will present itself.

[krakxn]

Yeah, that's the mindset to have. But you should always be down to cloning if nothing works, because at that point you will have definitely grasped the concept of the topic itself and the specific debugging scenario. As time would be better spent that way - and when you ever encounter such a situation you will be well off to handle it by yourself.

[DorianDaSilva]

@krakxn Appreciate the advice, will most likely do so in order to be able to proceed. Thank you!

[ghost]

Assuming you’re happy to import VRFCoordinatorV2Mock from the @chainlink/contracts package, the following changes fix your code:

Step 1

Run yarn add @chainlink/contracts --dev

Step 2

Replace your VRFCoordinatorV2Mock.sol file content with:

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

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

Step 3

Delete your artifacts and cache directories.

Step 4

Fix typo on line 29 in 01-deploy-raffle.js (subscritpionId -> subscriptionId.)

Step 5

On line 78 in raffle.test.js, change interval.toNumber() + 1 to interval.toNumber() - 1.

---

If you insist on writing the VRFCoordinatorV2Mock code (rather than importing it from the @chainlink/contracts package), you need to debug your VRFCoordinatorV2Mock.sol and Imports/* files - I think there must be an error lurking in those files, but I haven’t checked to see where.

[DorianDaSilva]

@jav4di Wow man, thank you so much!!! It worked, you are amazing...All the best.

[ghost]

My pleasure, sir. You have great persistence. Enjoy your journey!

[DorianDaSilva]

Thank you! Likewise.