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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

interface IAutoJob {
    function checkJob() external view returns (bool canExec, bytes memory execPayload);
    function performJob(bytes calldata execPayload) external;
}

contract MyKeeper is IAutoJob {
    address public immutable REGISTRY_ADDRESS;
    uint256 public nextRun = block.timestamp + 1 hours;

    error NotRegistry();

    constructor(address registry) { REGISTRY_ADDRESS = registry; }

    function checkJob() external view returns (bool, bytes memory) {
        return (block.timestamp >= nextRun, "");
    }

    function performJob(bytes calldata) external {
        if (msg.sender != REGISTRY_ADDRESS) revert NotRegistry();
        if (block.timestamp < nextRun) return;   // idempotent
        nextRun = block.timestamp + 1 hours;     // effect first
        // ...your maintenance call here...
    }
}