/**
 * Encoding and fail-closed decoding for the application outbox's index
 * records (WFT-85): the per-outbox header, the idempotency binding, and the
 * delivery-id entries the due, listing, and terminal indexes hold.
 *
 * @module core/outbox-index-codec
 */
import type { ApplicationDeliveryIdempotencyRecord, OutboxRecord } from './outbox-types.ts';
/**
 * Decode the per-outbox header.
 *
 * @throws {PersistedDataCorruptError} When the stored bytes are malformed or
 * name a different outbox than the key does.
 */
export declare function decodeOutboxRecord(bytes: Uint8Array, key: string): OutboxRecord;
/** Encode the per-outbox header. */
export declare function encodeOutboxRecord(record: OutboxRecord): Uint8Array;
/**
 * Decode an idempotency binding.
 *
 * @throws {PersistedDataCorruptError} When the stored bytes are malformed.
 */
export declare function decodeApplicationDeliveryIdempotencyRecord(bytes: Uint8Array, key: string): ApplicationDeliveryIdempotencyRecord;
/** Encode an idempotency binding. */
export declare function encodeApplicationDeliveryIdempotencyRecord(record: ApplicationDeliveryIdempotencyRecord): Uint8Array;
/**
 * Decode a due, listing, or terminal index entry: the delivery id it points at.
 *
 * @throws {PersistedDataCorruptError} When the entry is not a usable identifier.
 */
export declare function decodeApplicationDeliveryEntry(bytes: Uint8Array, key: string): string;
/** Encode a due, listing, or terminal index entry. */
export declare function encodeApplicationDeliveryEntry(deliveryId: string): Uint8Array;