/**
 * Creates an S3 utility object.
 *
 * @param connectionConfig
 *
 * @param s3 - used for tests, mock can be supplied
 * @returns {Object}
 * @constructor
 */
export function S3Util(connectionConfig: any, s3: any): Object;
export class S3Util {
    /**
     * Creates an S3 utility object.
     *
     * @param connectionConfig
     *
     * @param s3 - used for tests, mock can be supplied
     * @returns {Object}
     * @constructor
     */
    constructor(connectionConfig: any, s3: any);
    /**
     * Create an AWS S3 client using an AWS token.
     */
    createClient: (stageInfo: any, useAccelerateEndpoint: any) => any;
    /**
     * Get file header based on file being uploaded or not.
     *
     * @param {Object} meta
     * @param {String} filename
     *
     * @returns {Object}
     */
    getFileHeader: (meta: Object, filename: string) => Object;
    /**
     * Create the file metadata then upload the file.
     *
     * @param {String} dataFile
     * @param {Object} meta
     * @param {Object} encryptionMetadata
     */
    uploadFile: (dataFile: string, meta: Object, encryptionMetadata: Object) => Promise<void>;
    /**
     * Multipart upload of `dataFile` to S3, reading `MULTIPART_PART_SIZE_BYTES`
     * bytes per chunk into a fresh Buffer and uploading each as a separate
     * UploadPart call.
     *
     * On any error (token expiry, transient network failure, etc.), best-effort
     * `AbortMultipartUpload` is issued so we don't leak partial-upload storage.
     * The caller's existing retry semantics (RENEW_TOKEN / NEED_RETRY result
     * statuses) layer cleanly on top: a failed upload leaves the stage clean
     * for the retry to start over.
     *
     * @param {String} dataFile - Local file path to upload.
     * @param {Number} fileSize - Pre-stat'd file size in bytes.
     * @param {Object} meta
     * @param {Object} encryptionMetadata
     */
    uploadFileMultipart: (dataFile: string, fileSize: number, meta: Object, encryptionMetadata: Object) => Promise<void>;
    /**
     * Create the file metadata then upload the file stream.
     *
     * @param {Buffer|string|stream.Readable} fileStream
     * @param {Object} meta
     * @param {Object} encryptionMetadata
     */
    uploadFileStream: (fileStream: Buffer | string | stream.Readable, meta: Object, encryptionMetadata: Object) => Promise<void>;
    /**
     * Download the file.
     *
     * @param {String} dataFile
     * @param {Object} meta
     * @param {Object} encryptionMetadata
     */
    nativeDownloadFile: (meta: Object, fullDstPath: any) => Promise<void>;
}
export const SNOWFLAKE_S3_DESTINATION: "s3.amazonaws.com";
export const DATA_SIZE_THRESHOLD: 67108864;
/**
 * Extract the bucket name and path from the metadata's stage location.
 *
 * @param {String} stageLocation
 *
 * @returns {Object}
 */
export function extractBucketNameAndPath(stageLocation: string): Object;