import * as https from 'https';
type RequestFn = (options: https.RequestOptions, payload?: Buffer) => Promise<Buffer | undefined>;
export declare class Calendar {
    /** @internal */ request_: RequestFn;
    /**
     * Call /digest on all calendars.
     * Returns the number of successful stamps.
     */
    stamp(timestamp: import('./timestamp').Timestamp, optUrls?: string[]): Promise<number>;
    /** Call /digest on one calendar. */
    stampOne(url: URL, hash: Buffer): Promise<Buffer | undefined>;
    /** Fetch updates from the calendar server for all pending attestations. */
    update(timestamp: import('./timestamp').Timestamp): Promise<boolean>;
    private updateInternal_;
    private static defaultRequest_;
}
export {};
//# sourceMappingURL=calendar.d.ts.map