import { EventParams } from './EventParams';
/**
 * Allows a decoupled and asynchronous communication between components.
 * Components can publish events for a given topic and
 * others can subscribe for future events for topics they are interested in.
 *
 * @public
 */
export interface EventsService {
    /**
     * Publishes an event for the topic.
     *
     * @param params - parameters for the to be published event.
     */
    publish(params: EventParams): Promise<void>;
    /**
     * Subscribes to one or more topics, registering an event handler for them.
     *
     * @param options - event subscription options.
     */
    subscribe(options: EventsServiceSubscribeOptions): Promise<void>;
}
/**
 * @public
 */
export type EventsServiceSubscribeOptions = {
    /**
     * Identifier for the subscription. E.g., used as part of log messages.
     */
    id: string;
    topics: string[];
    onEvent: EventsServiceEventHandler;
};
/**
 * @public
 */
export type EventsServiceEventHandler = (params: EventParams) => Promise<void>;