/**
 * ibantools-germany
 * Copyright (C) 2022-2024 Markus Baumer <markus@baumer.dev>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.

 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
export interface CheckDigits {
    [method: string]: number[];
}
export interface NextCheckDigits {
    add: CheckDigits;
    remove: CheckDigits;
    valid: string;
}
/**
 * Returns date object
 *
 * @param date Date from string or current date if undefined
 * @returns
 */
export declare const dateObject: (date?: string | Date) => Date;
/**
 * Combines current data by adding or removing from data provided in next
 * @param current
 * @param nextAdd
 * @param nextRemove
 */
export declare const combineCurrentNext: (current: CheckDigits, nextAdd: CheckDigits, nextRemove: CheckDigits) => CheckDigits;
/**
 * Get data, either current or combined with next by comparing it to valid-to
 * date from next data
 * @param date
 * @returns
 */
export declare const checkDigitData: (date?: string | Date) => CheckDigits;
/**
 * Get the check digit method assigned for a BLZ
 *
 * @param blz German BLZ with 8 digits
 * @param date Method valid at this date (default: current date)
 * @returns Check digit method or null if invalid
 */
export declare const methodForBLZ: (blz: string, date?: string | Date) => string | null;