export { LazyBlob };
export { LazyFile };
export { isLazyBlob };
export { isLazyFile };
import type { MultipartReader } from './MultipartReader.js';
import type { FileMetadata, BlobMetadata } from '../../../shared/multipart/constants.js';
declare const LAZY_BLOB_BRAND: unique symbol;
declare const LAZY_FILE_BRAND: unique symbol;
declare function isLazyBlob(value: unknown): value is LazyBlob;
declare function isLazyFile(value: unknown): value is LazyFile;
/** Shared Blob implementation — subclasses only provide `stream()`. */
declare abstract class BaseStreamBlob implements Blob {
    abstract readonly size: number;
    abstract readonly type: string;
    abstract stream(): ReadableStream<Uint8Array<ArrayBuffer>>;
    arrayBuffer(): Promise<ArrayBuffer>;
    bytes(): Promise<Uint8Array<ArrayBuffer>>;
    text(): Promise<string>;
    slice(start?: number, end?: number, contentType?: string): Blob;
    get [Symbol.toStringTag](): string;
}
/**
 * A Blob backed by a pull-based MultipartReader.
 *
 * `size` and `type` are available immediately from metadata.
 * Body data is pulled from the stream on demand — no background pump.
 * Each instance is **one-shot**: once consumed, further reads throw.
 */
declare class LazyBlob extends BaseStreamBlob {
    #private;
    readonly size: number;
    readonly type: string;
    readonly [LAZY_BLOB_BRAND] = true;
    constructor(reader: MultipartReader, metadata: BlobMetadata);
    stream(): ReadableStream<Uint8Array<ArrayBuffer>>;
}
/**
 * A File implementation backed by a pull-based MultipartReader.
 * Extends LazyBlob with `name`, `lastModified`, and `webkitRelativePath`.
 */
declare class LazyFile extends LazyBlob implements File {
    readonly name: string;
    readonly lastModified: number;
    readonly webkitRelativePath: string;
    readonly [LAZY_FILE_BRAND] = true;
    constructor(reader: MultipartReader, metadata: FileMetadata);
    get [Symbol.toStringTag](): string;
}