import { z } from 'zod/v4';
/**
 * Upper bound for the declared size of an offloaded payload, in bytes (256 MiB).
 *
 * The size is read from an incoming (potentially untrusted) pointer and used to
 * pre-allocate a buffer when streaming the payload back from the store. Capping it
 * here means a malformed or hostile pointer claiming a multi-gigabyte size fails
 * schema validation (and is routed to the DLQ) instead of triggering a huge
 * allocation. 256 MiB is far above any realistic queue payload.
 */
export declare const MAX_OFFLOADED_PAYLOAD_SIZE: number;
/**
 * Multi-store payload reference schema.
 * Contains information about where and how the payload was stored.
 */
export declare const PAYLOAD_REF_SCHEMA: z.ZodObject<{
    id: z.ZodString;
    store: z.ZodString;
    size: z.ZodNumber;
    codec: z.ZodOptional<z.ZodString>;
}, z.core.$strip>;
export type PayloadRef = z.output<typeof PAYLOAD_REF_SCHEMA>;
/**
 * When the payload is too large to be sent in a single message, it is offloaded to a storage service and a pointer to the offloaded payload is sent instead.
 * This schema represents the reference to the payload that is sent in place of the original payload.
 *
 * The schema supports two formats:
 * 1. New format, payloadRef object with id, store, and size
 * 2. Old format, offloadedPayloadPointer and offloadedPayloadSize (for backward compatibility)
 *
 * At least one format must be present in the message.
 */
export declare const OFFLOADED_PAYLOAD_POINTER_PAYLOAD_SCHEMA: z.ZodObject<{
    payloadRef: z.ZodOptional<z.ZodObject<{
        id: z.ZodString;
        store: z.ZodString;
        size: z.ZodNumber;
        codec: z.ZodOptional<z.ZodString>;
    }, z.core.$strip>>;
    offloadedPayloadPointer: z.ZodOptional<z.ZodString>;
    offloadedPayloadSize: z.ZodOptional<z.ZodNumber>;
}, z.core.$loose>;
export type OffloadedPayloadPointerPayload = z.output<typeof OFFLOADED_PAYLOAD_POINTER_PAYLOAD_SCHEMA>;
export declare function isOffloadedPayloadPointerPayload(value: unknown): value is OffloadedPayloadPointerPayload;