// SPDX-License-Identifier: MIT
// OpenZeppelin Confidential Contracts (last updated v0.5.0) (utils/HandleAccessManager.sol)
pragma solidity ^0.8.26;

import {Impl} from "@fhevm/solidity/lib/Impl.sol";

abstract contract HandleAccessManager {
    error HandleAccessManagerNotAllowed(bytes32 handle, address account);

    /**
     * @dev Get handle access for the given handle `handle`. Access will be given to the
     * account `account` with the given persistence flag.
     *
     * NOTE: This function call is validated by {_validateHandleAllowance}.
     */
    function getHandleAllowance(bytes32 handle, address account, bool persistent) public virtual {
        require(_validateHandleAllowance(handle), HandleAccessManagerNotAllowed(handle, account));
        if (persistent) {
            Impl.allow(handle, account);
        } else {
            Impl.allowTransient(handle, account);
        }
    }

    /**
     * @dev Validation function that must return true if the message sender is allowed to call
     * {getHandleAllowance} for the given handle.
     */
    function _validateHandleAllowance(bytes32) internal view virtual returns (bool) {
        return false;
    }
}