/**
 * ## Cache
 * This module makes it easy to cache media such as images and videos locally
 * on your kiosk to improve performance and support offline functionality.
 *
 * @packageDocumentation
 */
export declare class Cache {
    /**
     * Returns the current cache size.
     * @example
     * ```javascript
     * eflyn.cache.getSize();
     * ```
     */
    getSize(): Promise<number>;
    /**
     * Clear all cached files.
     * @example
     * ```javascript
     * eflyn.cache.clear();
     * ```
     */
    clear(): Promise<void>;
    /**
     * Cache the file located at a particular URL.
     * @example
     * ```javascript
     * eflyn.cache.url(url);
     * ```
     */
    url(url: string): Promise<void>;
    getLocalCacheUrl(url: string): Promise<string>;
}