import type { S3Client } from "@aws-sdk/client-s3";
export declare const MIN_MULTIPART_PART_SIZE: number;
export declare const DEFAULT_MULTIPART_PART_SIZE: number;
export declare const MAX_MULTIPART_PART_SIZE: number;
export declare const DEFAULT_MULTIPART_QUEUE_SIZE = 2;
export declare const MAX_MULTIPART_QUEUE_SIZE = 16;
export interface S3BlobStorageStreamUploadInput {
    readonly bucket: string;
    readonly key: string;
    readonly stream: ReadableStream;
    readonly mimeType: string;
    readonly expiresAt?: Date;
    readonly metadata?: Readonly<Record<string, string>>;
    readonly partSize: number;
    readonly queueSize: number;
    readonly signal?: AbortSignal;
}
export interface S3BlobStorageStreamUploader {
    upload(input: S3BlobStorageStreamUploadInput): Promise<number>;
}
/** Create the official AWS multipart adapter for unknown-length Web streams. */
export declare function createS3BlobStorageStreamUploader(client: S3Client): S3BlobStorageStreamUploader;
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