/**
 * ibantools-germany
 * Copyright (c) 2022-2026 Markus Baumer <markus@baumer.dev>
 * SPDX-License-Identifier: MIT OR MPL-2.0
 */
import type { ProbablyString } from "./types";
/**
 * Validate bank account number and BLZ
 *
 * IMPORTANT: A positive result does not does not necessarily mean that
 * the account exists; it only checks for structure and check digit!
 *
 * @param accountNumber Account number with up to 10 digits
 * @param blz German BLZ with 8 digits
 * @returns
 */
export declare const isValidAccountNumberBLZ: (accountNumber: ProbablyString, blz: ProbablyString) => boolean;
/**
 * Validate German BBAN
 *
 * IMPORTANT: A positive result does not does not necessarily mean that
 * the account exists; it only checks for structure and check digit!
 *
 * @param bban German BBAN with 18 digits
 * @returns
 */
export declare const isValidBBAN: (bban: ProbablyString) => boolean;
/**
 * Validate (German) IBAN
 *
 * If `onlyGermany` is true, it will return false for any IBAN not starting
 * with "DE". If false, non-German IBAN will be verified but no national
 * methods will be applied.
 *
 * IMPORTANT: A positive result does not does not necessarily mean that
 * the account exists; it only checks for structure and check digit!
 *
 * @param iban German IBAN with 22 chars
 * @param onlyGermany Allow only German IBANs (default: false)
 * @returns
 */
export declare const isValidIBAN: (iban: ProbablyString, onlyGermany?: boolean) => boolean;