/**
 * Blob Offloading for Dexie Cloud
 *
 * Handles uploading large blobs to blob storage before sync,
 * and resolving BlobRefs when reading from the database.
 */
import { DBOperationsSet } from 'dexie-cloud-common';
import { BlobRef, BlobRefOrigType, isBlobRef as isBlobRefFromResolve } from './blobResolve';
export declare const DEFAULT_MAX_STRING_LENGTH = 32768;
export type { BlobRef, BlobRefOrigType };
export declare const isBlobRef: typeof isBlobRefFromResolve;
/**
 * Check if a value should be offloaded to blob storage
 * Performance-optimized for hot path traversal.
 */
export declare function shouldOffloadBlob(value: unknown): value is Blob | ArrayBuffer | ArrayBufferView;
/**
 * Upload a blob to the blob storage endpoint
 */
export declare function uploadBlob(databaseUrl: string, getCachedAccessToken: () => Promise<string | null>, blob: Blob | ArrayBuffer | ArrayBufferView): Promise<BlobRef | null>;
export declare function offloadBlobsAndMarkDirty(obj: unknown, databaseUrl: string, getCachedAccessToken: () => Promise<string | null>, maxStringLength?: number): Promise<unknown>;
/**
 * Recursively scan an object for large blobs and upload them
 * Returns a new object with blobs replaced by BlobRefs
 */
export declare function offloadBlobs(obj: unknown, databaseUrl: string, getCachedAccessToken: () => Promise<string | null>, maxStringLength?: number, dirtyFlag?: {
    dirty: boolean;
}, visited?: WeakSet<object>): Promise<unknown>;
/**
 * Process a DBOperationsSet and offload any large blobs
 * Returns a new DBOperationsSet with blobs replaced by BlobRefs
 */
export declare function offloadBlobsInOperations(operations: DBOperationsSet, databaseUrl: string, getCachedAccessToken: () => Promise<string | null>, maxStringLength?: number): Promise<DBOperationsSet>;
/**
 * Check if there are any large blobs in the operations that need offloading
 * This is a quick check to avoid unnecessary processing
 */
export declare function hasLargeBlobsInOperations(operations: DBOperationsSet, maxStringLength?: number): boolean;