import { BucketType, UploadPurpose } from '../controls/FileUploader';
export declare class S3PresignedHelper {
    static getUploadPresignedUrlsCallback?: (params: Array<{
        bucketType: BucketType;
        extension: string;
        purpose?: UploadPurpose;
        sidOrUidOrAccountId?: string | null;
    }>) => Promise<Array<{
        bucketName: string;
        objectKey: string;
        presignedUrl: string;
    }>>;
    static getDownloadPresignedUrlsCallback?: (params: Array<{
        specialUrl: string;
        width?: number;
    }>) => Promise<Array<{
        presignedUrl: string;
        specialUrl: string;
    }>>;
}