import { EventMap } from './types';
export type EventHandler<T> = (payload: T) => void;
export type Unsubscribe = () => void;
export interface EventBus<Events extends Record<string, unknown>> {
    /** Emit an event with payload */
    emit<K extends keyof Events>(event: K, payload: Events[K]): void;
    /** Subscribe to an event */
    on<K extends keyof Events>(event: K, handler: EventHandler<Events[K]>): Unsubscribe;
    /** Subscribe to an event, automatically unsubscribe after first emission */
    once<K extends keyof Events>(event: K, handler: EventHandler<Events[K]>): Unsubscribe;
    /** Remove all listeners for an event, or all listeners if no event specified */
    off<K extends keyof Events>(event?: K): void;
    /** Destroy the event bus */
    destroy(): void;
}
/**
 * Create a typed event bus
 */
export declare function createEventBus<Events extends Record<string, unknown> = EventMap>(): EventBus<Events>;
/**
 * Create a namespaced event bus that prefixes all events
 */
export declare function createNamespacedEventBus<Events extends Record<string, unknown>>(parentBus: EventBus<Record<string, unknown>>, namespace: string): EventBus<Events>;
//# sourceMappingURL=event-bus.d.ts.map