/**
 * Returns a single control digit for the given input
 *
 * @param input
 */
export declare function getLuhnControlDigit(input: string): number;
/**
 * Returns an array of control digits for the given input
 *
 * @param input
 * @param numberOfDigits
 */
export declare function getLuhnControlDigits(input: string, numberOfDigits: number): number[];
export declare function checkLuhnControlDigit(input: string): boolean;
export declare function checkLuhnControlDigits(input: string, numberOfDigits: number): boolean;