export type TimerPlusXCallback = {
    /**
     * Source app name for Timer+'s x-callback-url support.
     */
    xSource?: string;
    /**
     * URL Timer+ opens after completing the action.
     */
    xSuccess?: string;
};
export declare function timerPlusCallbackParams(payload: TimerPlusXCallback): {
    'x-success'?: string | undefined;
    'x-source'?: string | undefined;
};
export declare function hasTimerPlusCallback(payload: TimerPlusXCallback): boolean;
export declare function timerPlusAppUrl(path: string, params?: Record<string, unknown>): string;
export declare function timerPlusXCallbackUrl(path: string, params?: Record<string, unknown>): string;