import type { CreateTopicalSubscriptionOpts, IEventData, JSONifier, RegisterSubscriptionParams, SerialiseReadEventFn } from './types.ts';
/**
 * Extract the date from a message ID, same as the PG function
 */
export declare function getDateFromMessageId(messageId: string): Date | undefined;
/**
 * Extract the date from a subscription ID
 */
export declare function getCreateDateFromSubscriptionId(id: string): Date | undefined;
/**
 * Creates subscription params for a subscription that matches
 * 1 or more topics. Also supports partitioning the subscription
 * such that only a subset of messages are received.
 */
export declare function createTopicalSubscriptionParams<T extends IEventData>({ topics, partition, additionalFilters, additionalParams, ...rest }: CreateTopicalSubscriptionOpts<T>): RegisterSubscriptionParams;
/**
 * Get an environment variable as a number
 */
export declare function getEnvNumber(key: string, defaultValue?: number): number;
export declare function createSimpleSerialiser(jsonifier: JSONifier): SerialiseReadEventFn;