/**
 * Validates a credit card number using the Luhn algorithm. The function requires a
 * 16-digit credit card number. Any dashes or whitespace are ignored.
 *
 * @param {string} number - The 16-digit credit card number as a string.
 * @returns {boolean} `true` if the credit card number is valid; `false` otherwise.
 */
export declare function isCreditCardNumberValid(number: string): boolean;
/**
 * Validates a credit card number using the Luhn algorithm. The function requires a
 * 16-digit credit card number. Any dashes or whitespace are ignored.
 *
 * @param {string} number - The 16-digit credit card number as a string.
 * @returns {boolean} `true` if the credit card number is invalid; `false` otherwise.
 */
export declare const isCreditCardNumberInvalid: (number: string) => boolean;
export declare const CreditCardType: {
    readonly Airline: "airline";
    readonly ClubCard: "clubcard";
    readonly Visa: "visa";
    readonly MasterCard: "mastercard";
    readonly Finances: "finances";
    readonly Fuel: "fuel";
    readonly Telecommunication: "telecommunication";
    readonly Other: "other";
};
export type CreditCardType = (typeof CreditCardType)[keyof typeof CreditCardType];
/**
 * Determines the type of credit card based on the first digit of the card number.
 *
 * @param {string} number - The credit card number as a string.
 * @returns {CreditCardType | null} The credit card type, or `null` if the type cannot
 * be determined.
 */
export declare function getCreditCardType(number: string): CreditCardType | null;