import { GetUrlInput, GetUrlOutput } from '../types';
/**
 * Get a temporary presigned URL to download the specified S3 object.
 * The presigned URL expires when the associated role used to sign the request expires or
 * the option  `expiresIn` is reached. The `expiresAt` property in the output object indicates when the URL MAY expire.
 *
 * By default, it will not validate the object that exists in S3. If you set the `options.validateObjectExistence`
 * to true, this method will verify the given object already exists in S3 before returning a presigned
 * URL, and will throw {@link StorageError} if the object does not exist.
 *
 * @param input - The GetUrlInput object.
 * @returns Presigned URL and timestamp when the URL MAY expire.
 * @throws service: {@link S3Exception} - thrown when checking for existence of the object
 * @throws validation: {@link StorageValidationErrorCode } - Validation errors
 * thrown either username or key are not defined.
 *
 */
export declare const getUrl: (input: GetUrlInput) => Promise<GetUrlOutput>;