import { PdfMergeError, PdfFetchError, InvalidPdfFormatError, mergeBase64PDFs, mergeBase64PDFsWithInfo, mergePdfBuffers, mergePdfBuffersWithInfo } from './core';
import type { MergeResult, MergeOptions, MergeUrlInput, MergePdfUrlsOptions, PageSelector, AcceptedInputFormat } from './core';
export { PdfMergeError, PdfFetchError, InvalidPdfFormatError, mergeBase64PDFs, mergeBase64PDFsWithInfo, mergePdfBuffers, mergePdfBuffersWithInfo, };
export type { PageSelector, PdfMetadata, MergeOptions, Watermark, TextWatermark, ImageWatermark, WatermarkPosition, PageNumbers, MergeResult, MergeBase64Input, MergeBufferInput, MergeUrlInput, MergePdfUrlsOptions, TableOfContents, InputFormat, AcceptedInputFormat, TextOptions, ImageOptions, } from './core';
/**
 * Fetches PDFs from the given ordered URLs and merges them into a single
 * Base64 PDF string. Downloads happen in parallel; the merge step assembles
 * them in the original index order.
 *
 * Security defaults:
 *  - Only `http:` and `https:` URLs are accepted (blocks `file:`, `data:`, etc.).
 *  - Each response is capped at ~100 MiB (configurable via `maxBytesPerUrl`).
 *  - URLs are sanitized in error messages (credentials and query strings stripped).
 *  - Opt into `blockPrivateHosts` / `allowedHosts` for SSRF protection, which
 *    resolves DNS and validates each redirect hop before it is contacted.
 *
 * @throws {PdfMergeError} when the input array is empty or a URL fails validation.
 * @throws {PdfFetchError} when a URL cannot be retrieved or does not return a PDF.
 * @throws {InvalidPdfFormatError} when a fetched payload is not a parseable PDF.
 */
export declare function mergePdfUrls(urls: MergeUrlInput[], options?: MergePdfUrlsOptions): Promise<string>;
/**
 * Like {@link mergePdfUrls}, but also returns the merged document's
 * `pageCount` and `byteLength` (see {@link MergeResult}). `byteLength` is the
 * size of the decoded PDF bytes, not the Base64 string length.
 */
export declare function mergePdfUrlsWithInfo(urls: MergeUrlInput[], options?: MergePdfUrlsOptions): Promise<MergeResult<string>>;
/** Entry accepted by `mergePdfFiles`: a path string, or an object specifying
 * which `pages` to keep and/or a `title` for the table of contents. When a
 * `title` is omitted, a generated TOC labels the entry with the file's
 * basename. */
export type MergeFileInput = string | {
    path: string;
    pages?: PageSelector;
    title?: string;
    /**
     * Input format. Auto-detected from the file extension (then magic bytes)
     * for `.pdf` / `.png` / `.jpg` / `.jpeg` / `.txt`; set it to override
     * detection. `'jpeg'` is accepted as an alias for `'jpg'`.
     */
    format?: AcceptedInputFormat;
};
/**
 * Like {@link mergePdfFiles}, but also returns the merged document's
 * `pageCount` and `byteLength` (see {@link MergeResult}). **Node.js only.**
 */
export declare function mergePdfFilesWithInfo(inputs: MergeFileInput[], options?: MergeOptions): Promise<MergeResult<Uint8Array>>;
export declare function mergePdfFiles(inputs: MergeFileInput[], options?: MergeOptions): Promise<Uint8Array>;