/**
 * Manages AppLovin MAX ad event listeners using a shared NativeEventEmitter.
 * Ensures only one active subscription per event type at any given time.
 */
import type { AdEventObject, AdEventListener } from './types/AdEvent';
/**
 * Subscribes to a specific ad event.
 * If a listener already exists for the event, it will be replaced.
 *
 * @param event - The event name to listen for.
 * @param handler - The callback to handle the event.
 */
export declare const addEventListener: <T extends AdEventObject>(event: string, handler: AdEventListener<T>) => void;
/**
 * Unsubscribes from a specific ad event, if a listener exists.
 *
 * @param event - The event name to unsubscribe from.
 */
export declare const removeEventListener: (event: string) => void;
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