import type { IHeaders, ITopicConfig } from "kafkajs";
import type { KafkaTopicName, KafkaMessageKey } from "../libs/branded-types/kafka/index.js";
import type { KTTopicPayloadParser } from "../libs/helpers/default-data-parser.js";
export type KTTopicSettings = ITopicConfig & {
    topic: KafkaTopicName;
    batchMessageSizeToConsume: number;
};
export type KTTopicPayload = {
    topicName: KafkaTopicName;
    message: string;
    messageKey: KafkaMessageKey;
};
type KTTopicMeta = {
    meta?: {
        traceId?: string;
    } & object & IHeaders;
};
export type KTTopicPayloadWithMeta = KTTopicPayload & KTTopicMeta;
export type KTTopicEvent<Payload extends object> = {
    (payload: Payload, { messageKey, meta }: KTTopicMeta & {
        messageKey: KafkaMessageKey;
    }): KTTopicPayloadWithMeta;
    topicSettings: KTTopicSettings;
    decode: KTTopicPayloadParser<Payload>['decode'];
};
export type KTTopic<T extends object> = typeof KTTopic<T>;
export declare const KTTopic: <Payload extends object>(settings: KTTopicSettings, validatorFn?: KTTopicPayloadParser<Payload>) => KTTopicEvent<Payload>;
export {};