import { Context, HandlerConfiguration, type JsonObject } from './context.js';
export * from './context.js';
export type EventHandlerConfiguration = HandlerConfiguration & {};
export type Handler = (context: Context, subject: string, event: JsonObject | undefined, timestamp: Date, messageId: string) => Promise<void> | void;
export declare function on(topic: string, event: string, fn: Handler): void;
export declare function on(topic: string, event: string, config: HandlerConfiguration, fn: Handler): void;