/**
 * Class describing a cache item for saving and reading
 * cached DIDs.
 */
export default class CacheItem {
    readonly name: string;
    readonly did: string;
    document: any;
    lastResolved: Date;
    published: boolean;
    /**
     * Package version.
     */
    readonly version: string;
    /**
     * Date indicating the date and time
     * the cache item was created.
     */
    readonly created: Date;
    /**
     * Constructs a new instance on the @see Message class.
     * @param name for the cache item.
     * @param did being cached.
     * @param document containing the latest state of the DID.
     * @param lastResolved indicating the last time the cached item was resolved.
     * @param published indicating whether the DID has been published to the network.
     */
    constructor(name: string, did: string, document: any, lastResolved: Date, published: boolean);
    /**
     * Loads the cache item with @param name from the specified directory.
     * @param directory that contains the cache.
     * @param name of the cache item to read.
     * @returns the cached item if found, otherwise undefined.
     */
    static read(directory: string, name: string): Promise<CacheItem | undefined>;
    /**
     * Saves the instance of the cache item to specified directory
     * as a json file.
     * @param directory to save the package to.
     */
    save(directory: string): Promise<void>;
    /**
     * Checks to see if the file name includes the
     * type '.json' and if not appends.
     * @param fileName to check.
     * @returns the filename with type appended.
     */
    private static appendType;
}