/**
 * UniqueIdGenerator
 *
 * A high-performance unique ID generator based on Snowflake architecture.
 * Generates a 64-bit numeric ID composed of:
 *
 *   - 41 bits for timestamp (in milliseconds since a custom epoch)
 *   - 10 bits for machine ID (auto-generated from OS network interface)
 *   - 12 bits for sequence number (increments within the same millisecond)
 *
 * Features:
 * - Generates up to 4096 unique IDs per millisecond per machine
 * - Ensures time-ordered and compact identifiers
 * - Automatically derives a consistent machine ID using Node.js `os` module
 * - Includes decoding method to extract timestamp, machine ID, and sequence
 *
 * Example ID structure:
 *   (timestamp << 22) | (machineId << 12) | sequence
 *
 * Suitable for distributed systems where unique, sortable, and compact IDs are needed.
 */
import { IDecodedIdResponse } from "./domain";
export declare class UniqueIdGenerator {
    private epoch;
    private machineId;
    private sequence;
    private lastTimestamp;
    constructor(epoch?: number);
    /**
   * Generates a unique 64-bit ID based on timestamp, machine ID, and sequence.
   * Returns a `bigint` ID.
   */
    generateUniqueId(): string;
    /**
   * Decodes a 64-bit ID into timestamp, machine ID, and sequence.
   * @param id - The ID to decode
   * @param epoch - (Optional) Custom epoch used during ID generation. Defaults to the instance's epoch.
   * @returns An object with timestamp, machineId, and sequence
   */
    decodeId(id: string, epoch?: number): IDecodedIdResponse;
    private currentTimestamp;
    private generateUniqueMachineId;
}