/**
 * @slynova/fence
 *
 * @license MIT
 * @copyright Slynova - Romain Lanz <romain.lanz@slynova.ch>
 */
import { TGate } from '../Contracts';
declare class Storage {
    /**
     * Storage where all the gates reside.
     */
    private $gates;
    /**
     * Storage where all the polices reside.
     */
    private $policies;
    /**
     * Constructor.
     */
    private constructor();
    /**
     * Returns the unique instance of the storage.
     */
    static readonly instance: Storage;
    /**
     * Retrieves a gate with the given name.
     *
     * @param name Name of the gate
     */
    retrieveGate(name: string): TGate | undefined;
    /**
     * Retrieves a policy with the given resource.
     *
     * @param resource Name of the resource
     */
    retrievePolicy(resource: string): object | undefined;
    /**
     * Stores a gate inside the storage.
     *
     * @param name     Name of the gate
     * @param callback Gate
     */
    storeGate(name: string, callback: TGate): void;
    /**
     * Stores a policy inside the storage.
     *
     * @param resource Name of the resource
     * @param policy   Policy for the given resource
     */
    storePolicy(resource: string, policy: object): void;
    /**
     * Resets the state of the storage.
     */
    private $reset;
}
export { Storage };