GlobalOwner.sol

// SPDX-License-Identifier: MIT
pragma solidity 0.8.18;

import {Initializable} from "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import {UUPSUpgradeable} from "@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol";
import {Ownable2StepUpgradeable} from "@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol";

/**
 * @title GlobalOwner
 * @author Lila Rest (https://lila.rest)
 * @custom:security-contact security@ledgity.com
 *
 * @notice Holds the address of a global owner account shared by all contracts of the
 * Ledgity Yield's codebase.
 *
 * @dev Specifically, some contracts within the codebase inherit from the
 * GlobalOwnableUpgradeable abstract contract. This provides them with an overriden
 * owner() function that retrieves the owner's address from this contract instead.
 *
 * @dev For further details, see "GlobalOwner" section of whitepaper.
 * @custom:security-contact security@ledgity.com
 */
contract GlobalOwner is Initializable, UUPSUpgradeable, Ownable2StepUpgradeable {
    /**
     * @notice Prevents implementation contract from being initialized as recommended by
     * OpenZeppelin.
     * @dev See: https://docs.openzeppelin.com/contracts/4.x/api/proxy#Initializable-_disableInitializers--
     * @custom:oz-upgrades-unsafe-allow constructor
     */
    constructor() {
        _disableInitializers();
    }

    /**
     * @notice Initializer function of the contract. It replaces the constructor()
     * function in the context of upgradeable contracts.
     * @dev See: https://docs.openzeppelin.com/contracts/4.x/upgradeable
     */
    function initialize() public initializer {
        __Ownable2Step_init();
        __UUPSUpgradeable_init();
    }

    /**
     * @notice Override of UUPSUpgradeable._authorizeUpgrade() function restricted to
     * global owner. It is called by the proxy contract during an upgrade.
     * @param newImplementation The address of the new implementation contract.
     */
    function _authorizeUpgrade(address newImplementation) internal override onlyOwner {}
}