calculate key, slot and value

madv.sol

// SPDX-License-Identifier: MIT
pragma solidity 0.8.25;

contract MADV { 
    function getKey(address validator) public pure returns (uint192) {
        return uint192(uint160(validator));
    }

    function getSlotAndValue(address validator) public pure returns (bytes32 slot, bytes32 value) {
        slot = bytes32(abi.encodePacked(getKey(validator)));
        value = bytes32(abi.encodePacked(validator));
    }
}