// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface AutomationCompatibleInterface { /** * @notice method that is simulated by the keepers to see if any work actually * needs to be performed. This method does does not actually need to be * executable, and since it is only ever simulated it can consume lots of gas. * @dev To ensure that it is never called, you may want to add the * cannotExecute modifier from KeeperBase to your implementation of this * method. * @param checkData specified in the upkeep registration so it is always the * same for a registered upkeep. This can easily be broken down into specific * arguments using `abi.decode`, so multiple upkeeps can be registered on the * same contract and easily differentiated by the contract. * @return upkeepNeeded boolean to indicate whether the keeper should call * performUpkeep or not. * @return performData bytes that the keeper should call performUpkeep with, if * upkeep is needed. If you would like to encode data to decode later, try * `abi.encode`. */ function checkUpkeep(bytes calldata checkData) external view returns (bool upkeepNeeded, bytes memory performData); /** * @notice method that is actually executed by the keepers, via the registry. * The data returned by the checkUpkeep simulation will be passed into * this method to actually be executed. * @dev The input to this method should not be trusted, and the caller of the * method should not even be restricted to any single registry. Anyone should * be able call it, and the input should be validated, there is no guarantee * that the data passed in is the performData returned from checkUpkeep. This * could happen due to malicious keepers, racing keepers, or simply a state * change while the performUpkeep transaction is waiting for confirmation. * Always validate the data passed in. * @param performData is the data which was passed back from the checkData * simulation. If it is encoded, it can easily be decoded into other types by * calling `abi.decode`. This data should not be trusted, and should be * validated against the contract's current state. */ function performUpkeep(bytes calldata performData) external; }