export declare class Storage {
    /**
     * Get a value from the storage key-value store.
     * @example
     * ```javascript
     * eflyn.storage.get(key: string, defaultValue?: any);
     * ```
     */
    get(key: string, defaultValue?: any): Promise<any>;
    /**
     * Sets a value on the storage key-value store.
     * @example
     * ```javascript
     * eflyn.storage.set(key: string, value: any);
     * ```
     */
    set(key: string, value: any): Promise<void>;
    /**
     * Remove a value from the storage key-value store.
     * @example
     * ```javascript
     * eflyn.storage.remove();
     * ```
     */
    remove(key: string): Promise<void>;
    /**
     * Clean the entire storage key-value database.
     * @example
     * ```javascript
     * eflyn.storage.clear();
     * ```
     */
    clear(): Promise<void>;
}