import type { HttpClient } from './http.js';
export interface FetchUpoParams {
    accessToken: string;
    sessionReferenceNumber: string;
    ksefNumber: string;
}
/**
 * Fetches the UPO (Urzędowe Poświadczenie Odbioru) XML for an invoice
 * via `GET /sessions/{referenceNumber}/invoices/ksef/{ksefNumber}/upo`.
 *
 * Returns the raw UPO XML string. Throws `KsefApiError` with code 21178
 * when the UPO is not yet available (invoice still being processed).
 */
export declare function fetchUpoXml(http: HttpClient, params: FetchUpoParams): Promise<string>;
/**
 * Fetches the invoice status from the session, which includes the
 * `upoDownloadUrl` pre-signed URL when the UPO is ready.
 *
 * Uses `GET /sessions/{referenceNumber}/invoices/{invoiceReferenceNumber}`.
 */
export declare function fetchInvoiceStatus(http: HttpClient, params: {
    accessToken: string;
    sessionReferenceNumber: string;
    invoiceReferenceNumber: string;
}): Promise<InvoiceStatusResult>;
export declare function upoStatusFromCode(code: number | undefined): 'confirmed' | 'pending' | 'rejected';
export interface InvoiceStatusResult {
    ksefNumber?: string;
    statusCode: number | undefined;
    statusDescription?: string;
    upoDownloadUrl?: string;
    permanentStorageDate?: string;
}
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