Perform UpKeep error

[anasimov]

Hi, I was wondering if anyone could help, with this error. ` TypeError: Overriding function return types differ. --> contracts/raffle.sol:75:5:	75	function checkUpkeep(	^ (Relevant source part starts here and spans across multiple lines). Note: Overridden function is here: --> @chainlink/contracts/src/v0.8/interfaces/AutomationCompatibleInterface.sol:22:3:
22	function checkUpkeep(bytes calldata checkData) external returns (bool upkeepNeeded, bytes memory performData);
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

TypeError: Contract "Raffle" should be marked as abstract. --> contracts/raffle.sol:19:1:	19	contract Raffle is VRFConsumerBaseV2, KeeperCompatibleInterface {	^ (Relevant source part starts here and spans across multiple lines). Note: Missing implementation: --> @chainlink/contracts/src/v0.8/interfaces/AutomationCompatibleInterface.sol:40:3:
40	function performUpkeep(bytes calldata performData) external;
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Error HH600: Compilation failed `

[0fprod]

Usually this

TypeError: Contract "Raffle" should be marked as abstract.
--> contracts/raffle.sol:19:1:

Is because you are missing something related to inheritance. Perhaps calling the constructor or overriding a virtual method.