export interface DownloadFileResult {
    fileName: string;
    contentType: string;
    contentBase64: string;
}
/**
 * Shared body for the 8 `lexware_download_*` tools: fetches the file, applies
 * the fallback name, and base64-encodes the payload.
 *
 * `fallbackName` is a literal for PDF-only tools, or a function of the
 * resolved `contentType` for XML-capable voucher and generic file downloads.
 * The fallback uses `||`, not
 * `??` — an empty-string `fileName` from the API must still fall through, not
 * just a missing one.
 *
 * `accept` is only forwarded to `lexwareDownload` when the caller passes one:
 * the PDF-only tools call it with a single argument, matching `lexwareDownload`'s
 * own `application/pdf` default and the exact call arity existing tests assert.
 */
export declare function downloadFileResult(path: string, fallbackName: string | ((contentType: string) => string), accept?: string): Promise<DownloadFileResult>;