import * as z from 'zod';
import { type RawPrincipal } from './principal';
/**
 * @see Timestamp
 */
export declare const TimestampSchema: z.ZodBigInt;
/**
 * Represents a timestamp in nanoseconds since the Unix epoch.
 *
 * Used for tracking when events occur, such as document creation and updates.
 */
export type Timestamp = z.infer<typeof TimestampSchema>;
/**
 * @see Version
 */
export declare const VersionSchema: z.ZodBigInt;
/**
 * Represents a version number for tracking changes.
 *
 * This is typically incremented with each update to ensure consistency.
 */
export type Version = z.infer<typeof VersionSchema>;
/**
 * @see RawUserId
 */
export declare const RawUserIdSchema: z.ZodCustom<Uint8Array<ArrayBuffer>, Uint8Array<ArrayBuffer>>;
/**
 * Represents a raw user identifier.
 *
 * This is a principal associated with a user.
 */
export type RawUserId = RawPrincipal;
/**
 * @see UserId
 */
export declare const UserIdSchema: z.ZodPipe<z.ZodCustom<import("@icp-sdk/core/principal").Principal, import("@icp-sdk/core/principal").Principal>, z.ZodTransform<import("@icp-sdk/core/principal").Principal, import("@icp-sdk/core/principal").Principal>>;
/**
 * Represents a user identifier.
 *
 * This is a principal associated with a user.
 */
export type UserId = z.infer<typeof UserIdSchema>;
/**
 * @see Collection
 */
export declare const CollectionSchema: z.ZodString;
/**
 * A collection name where data are stored.
 */
export type Collection = z.infer<typeof CollectionSchema>;
/**
 * @see Key
 */
export declare const KeySchema: z.ZodString;
/**
 * A key identifier within a collection.
 */
export type Key = z.infer<typeof KeySchema>;
/**
 * @see Description
 */
export declare const DescriptionSchema: z.ZodString;
/**
 * Represents a description with a maximum length of 1024 characters.
 * Used for document and asset fields which can be useful for search purpose.
 */
export type Description = z.infer<typeof DescriptionSchema>;