import { BaseCompanyInfo, BaseInvoice } from '../models';
/**
 * Provides functionality for handling factur-x conformance.
 */
export declare abstract class FacturXUtilities {
    /**
     * Creates and attaches a factur-x xml to the invoice pdf at the given path.
     * @param pdfFilePath - The path of the invoice pdf to attach to.
     * @param invoice - The invoice data to generate the xml from.
     * @param currency - The currency code, eg. 'USD'.
     * @param companyInfo - Info about the seller.
     * @param tradeContact - The trade contact. Defaults to companyInfo.ceo.
     */
    static attachFacturX<Invoice extends BaseInvoice>(pdfFilePath: string, invoice: Invoice, currency: string, companyInfo: BaseCompanyInfo, tradeContact?: string | undefined): Promise<void>;
    /**
     * Adds the required factur-x metadata to the pdf file at the provided path.
     * @param pdfFilePath - The path of the invoice pdf.
     * @param author - The author that should be set.
     * @param id - The id to use in the metadata.
     * @param producer - The producer that should be set. Defaults to `lbx-invoice`.
     */
    static addFacturXMetadata(pdfFilePath: string, author: string, id: string, producer?: string): Promise<void>;
    private static createFacturXBytes;
}