import { SagaEvent } from '../types';
/**
 * Type for event handler functions
 */
export type EventHandler = (event: SagaEvent) => Promise<void>;
/**
 * Interface for subscribing to events in a Saga
 */
export interface EventSubscriber {
    /**
     * Subscribes to events on a topic
     * @param topic Topic to subscribe to
     * @param handler Handler function for events
     */
    subscribe(topic: string, handler: EventHandler): Promise<void>;
    /**
     * Unsubscribes from events on a topic
     * @param topic Topic to unsubscribe from
     */
    unsubscribe(topic: string): Promise<void>;
}
/**
 * Base implementation of EventSubscriber
 */
export declare abstract class BaseEventSubscriber implements EventSubscriber {
    /**
     * Subscribes to events on a topic
     * @param topic Topic to subscribe to
     * @param handler Handler function for events
     */
    abstract subscribe(topic: string, handler: EventHandler): Promise<void>;
    /**
     * Unsubscribes from events on a topic
     * @param topic Topic to unsubscribe from
     */
    abstract unsubscribe(topic: string): Promise<void>;
}