// SPDX-License-Identifier: MIT
pragma solidity ^0.8.23;

// interfaces

// libraries
import {EnumerableSet} from "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";

// contracts

enum NodeOperatorStatus {
    Exiting,
    Standby,
    Approved,
    Active
}

library NodeOperatorStorage {
    // keccak256(abi.encode(uint256(keccak256("factory.facets.operator.storage")) - 1)) &
    // ~bytes32(uint256(0xff))
    bytes32 internal constant STORAGE_SLOT =
        0x988e8266be98e92aff755bdd688f8f4a2421e26daa6089c7e2668053a3bf5500;

    struct Layout {
        EnumerableSet.AddressSet operators;
        mapping(address => NodeOperatorStatus) statusByOperator;
        mapping(address => uint256) commissionByOperator;
        mapping(address => address) claimerByOperator;
        mapping(address => EnumerableSet.AddressSet) operatorsByClaimer;
        mapping(address operator => uint256 approvalTime) approvalTimeByOperator;
    }

    function layout() internal pure returns (Layout storage l) {
        bytes32 slot = STORAGE_SLOT;
        assembly {
            l.slot := slot
        }
    }
}