export declare const defaultErrors: {
    allowedCharactersError: string;
    tooShortError: string;
    tooLongError: string;
    wrongLengthForState: string;
    parseError: string;
    missingZeroError: string;
    unknownStatePrefixError: string;
    unknownFinanzamtError: string;
    wrongStateError: string;
    bezirksnummerError: string;
    pruefzifferError: string;
    nwInternalConsistencyError: string;
    missingStateInformationError: string;
};
type ErrorMessages = typeof defaultErrors;
export type ISO3166_2Codes = 'DE-BW' | 'DE-BY' | 'DE-BE' | 'DE-BB' | 'DE-SN' | 'DE-ST' | 'DE-HB' | 'DE-HH' | 'DE-HE' | 'DE-MV' | 'DE-TH' | 'DE-NI' | 'DE-NW' | 'DE-RP' | 'DE-SL' | 'DE-SH';
type ISO3166_2Codes_11erVerfahren = 'DE-BY' | 'DE-BE-A' | 'DE-BE-B' | 'DE-BB' | 'DE-HB' | 'DE-HH' | 'DE-MV' | 'DE-NI' | 'DE-NW' | 'DE-SL' | 'DE-SN' | 'DE-ST' | 'DE-TH';
export type Options = {
    bundesland?: ISO3166_2Codes;
    errorMessages?: Partial<ErrorMessages>;
};
/**
 * Returns `undefined`, if the given `val` is a valid German Steuernummer. If
 * not, returns and error describing the first violated constraint met during
 * the validation process.
 *
 * Using the second options argument, a `bundesland` can be passed to explicitly
 * state the Bundesland the Steuernummer should belong to.
 *
 * This is what's being validated:
 *
 *  - The given string contains only digits, ' ', or '/'
 *  - The number of digits in the given string is between 10 and 13
 *  - The state (Bundesland) issuing the Steuernummer is known
 *    - Either, because the Steuernummer contains a state prefix (i.e., is of
 *      length >= 12)
 *    - Or, because the `bundesland` option was used to deliberately name the
 *      state (for example, when providing a Steuernummer using the common
 *      Standardschema der Länder)
 *  - The state information contained in the Steuernummer matches the
 *    `bundesland` option, if both are given
 *  - The Bundesfinanzamtsnummer part of the Steuernummer references a known
 *    Bundesfinanzamt. The list to check against is based on the "GemFA 2.0"
 *    (GEMeinden und FinanzAemter 2.0) data, which lists 610 Finanzämter as of
 *    October 5th 2022.
 *  - The Bezirksnummer part of the Steuernummer is valid (checking Bundesland-
 *    specific constraints)
 *  - The Unterscheidungsnummer and Prüfziffer fulfill requirements specific to
 *    Nordrhein-Westfalen
 *  - The Prüfziffer is valid. In the case of a Steuernummer from Berlin,
 *    validation passes if the Prüfziffer matches that calculated either for the
 *    Berlin-A _or_ the Berlin-B scheme.
 *
 * Cf. https://download.elster.de/download/schnittstellen/Pruefung_der_Steuer_und_Steueridentifikatsnummer.pdf
 *
 * Using the second options argument, all / individual error messages (default
 * to German) can be overwritten.
 */
export declare function validateSteuernummer(value: string, options?: Options): any;
export type ParsedSteuernummer = {
    normalizedSteuernummer: string;
    states: ISO3166_2Codes | ISO3166_2Codes[];
    statePrefix: string;
    bundesfinanzamtnummer: string;
    bezirksnummer: string;
    unterscheidungsnummer: string;
    pruefziffer: string;
};
/**
 * Parses the steuernummer contained in the given `value`, or throws an error if
 * parsing is not possible. `value` could contain a steuernummer in the:
 *  - "Standardschema der Länder"
 *  - "Vereinheitlichtes Bundesschema"
 *  - "Vereinheitlichtes Bundesschema zur elektronischen Übermittlung"
 */
export declare function parseSteuernummer(value: string, options: Options): ParsedSteuernummer;
/**
 * Determines the Prüfziffer of the given `normalizedDigits` (string of digits
 * with length 12) using the 2er-Verfahren (used in DE-BW, DE-HE, and DE-SH).
 */
export declare function getPruefziffer2er(normalizedDigits: string): number;
/**
 * Determines the Prüfziffer of the given `normalizedDigits` (string of digits
 * with length 12) using the modified 11er Verfahren (used in DE-RP).
 */
export declare function getPruefzifferModified11er(normalizedDigits: string): number;
/**
 * Determines the Prüfziffer of the given `normalizedDigits` (string of digits
 * with length 12) using the 11er Verfahren (used in most Bundeslaender, where
 * not the 2er Verfahren or modified 11er Verfahren is used).
 */
export declare function getPruefziffer11er(normalizedDigits: string, land: ISO3166_2Codes_11erVerfahren): number;
export {};