/**
 * Send a `StoreFile` instance as a `ctx` response.
 * Handles byte range requests as well. May need some improvements to set some better
 * cache headers.
 *
 * @param {import("@aws-sdk/client-s3").S3Client} s3Client
 * @param {import("koa").Context} ctx
 * @param {import("./generated/common/types.d.ts").StoreFile} file
 * @param {{
 *   cacheControlHeader?: string,
 * }} [options]
 * @returns {Promise<void>}
 */
export function fileSendResponse(s3Client: import("@aws-sdk/client-s3").S3Client, ctx: import("koa").Context, file: import("./generated/common/types.d.ts").StoreFile, options?: {
    cacheControlHeader?: string;
}): Promise<void>;
/**
 * Wraps {@link fileSendResponse}, to include an image transformer compatible with Next.js
 * image loader. Only works if the input file is an image. It caches the results on in
 * the file.meta.
 *
 * Supported extensions: image/png, image/jpeg, image/jpg, image/webp, image/avif,
 * image/gif. It does not support 'animated' versions of image/webp and image/gif and
 * just sends those as is. See {@link FileType#mimeTypes} and {@link fileCreateOrUpdate}
 * to enforce this on file upload.
 *
 * Prefers to transform the image to `image/webp` or `image/avif` if the client supports
 * it.
 *
 * The transform happens via {@link jobFileTransformImage}. When a transform is not yet possible,
 * the original file is send out, while a transform job is inserted.
 *
 * @param {import("postgres").Sql} sql
 * @param {import("@aws-sdk/client-s3").S3Client} s3Client
 * @param {import("koa").Context} ctx
 * @param {import("./generated/common/types.d.ts").StoreFile} file
 * @param {{
 *   cacheControlHeader?: string,
 * }} [options]
 * @returns {Promise<void>}
 */
export function fileSendTransformedImageResponse(sql: import("postgres").Sql, s3Client: import("@aws-sdk/client-s3").S3Client, ctx: import("koa").Context, file: import("./generated/common/types.d.ts").StoreFile, options?: {
    cacheControlHeader?: string;
}): Promise<void>;