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I ran into a problem with implementing Patrick Collins' automation smart contract, and I received "contract 'raffle should be marked as abstract" and is not compiled. What is wrong with my code?

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

import "@chainlink/contracts/src/v0.8/vrf/VRFConsumerBaseV2.sol";
import "@chainlink/contracts/src/v0.8/interfaces/VRFCoordinatorV2Interface.sol";
import "@chainlink/contracts/src/v0.8/automation/AutomationCompatible.sol";

error Raffle__NotEnoughEthEnterned();
error Raffle__TransferFailed();
error Raffle__NotOpen();
error Raffle__UpkeepNotNeeded(uint256 currentBalance, uint256 numPlayers, uint256 raffleState);

contract Raffle is VRFConsumerBaseV2, AutomationCompatibleInterface {}

1 Answer 1

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Ran into the same problem. The problem is:

Note: Missing implementation: 
  --> @chainlink/contracts/src/v0.8/automation/interfaces/AutomationCompatibleInterface.sol:40:3:
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40 |   function performUpkeep(bytes calldata performData) external;

You can add the implementation of functions checkUpkeep and performUpkeep in the contract:

function checkUpkeep(bytes calldata checkData) external returns (bool upkeepNeeded, bytes memory performData) {}

function performUpkeep(bytes calldata performData) external override {}

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