import { type Id } from '../identifier.utils.js';
/** Stream, topic, and consumer-group identifiers. */
export type TargetGroup = {
    streamId: Id;
    topicId: Id;
    groupId: Id;
};
/**
 * Consumer group information.
 */
export type ConsumerGroup = {
    /** Consumer group ID */
    id: number;
    /** Consumer group name */
    name: string;
    /** Number of members in the group */
    membersCount: number;
    /** Number of partitions assigned to the group */
    partitionsCount: number;
};
/**
 * Result of deserializing a consumer group.
 */
type ConsumerGroupDeserialized = {
    /** Number of bytes consumed */
    bytesRead: number;
    /** Deserialized consumer group data */
    data: ConsumerGroup;
};
/**
 * Serializes stream, topic, and group identifiers for targeting a consumer group.
 *
 * @param streamId - Stream identifier (ID or name)
 * @param topicId - Topic identifier (ID or name)
 * @param groupId - Consumer group identifier (ID or name)
 * @returns Buffer containing serialized identifiers
 */
export declare const serializeTargetGroup: (streamId: Id, topicId: Id, groupId: Id) => Buffer<ArrayBuffer>;
/**
 * Deserializes a consumer group from a buffer.
 *
 * @param r - Buffer containing serialized consumer group data
 * @param pos - Starting position in the buffer
 * @returns Object with bytes read and deserialized consumer group data
 */
export declare const deserializeConsumerGroup: (r: Buffer, pos?: number) => ConsumerGroupDeserialized;
/**
 * Deserializes multiple consumer groups from a buffer.
 *
 * @param r - Buffer containing serialized consumer groups data
 * @param pos - Starting position in the buffer
 * @returns Array of deserialized consumer groups
 */
export declare const deserializeConsumerGroups: (r: Buffer, pos?: number) => ConsumerGroup[];
export {};
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