export declare class CountryCurrencyCode {
    private static countryCurrencyMap;
    /**
     * Returns the currency code for a given country code.
     *
     * @param {string} countryCode - The ISO 3166-1 alpha-2 country code.
     * @returns {string | null} - The ISO 4217 currency code or null if the country code is invalid.
     *
     * @example
     * ```ts
     * const currency = CountryCurrencyCode.getCurrencyByCountryCode('US');
     * console.log(currency); // Output: 'USD'
     *
     * const invalidCurrency = CountryCurrencyCode.getCurrencyByCountryCode('XYZ');
     * console.log(invalidCurrency); // Output: null
     * ```
     */
    static getCurrencyByCountryCode(countryCode: string): string | null;
    /**
     * Returns the list of country codes associated with a given currency code.
     *
     * @param {string} currencyCode - The ISO 4217 currency code.
     * @returns {string[] | null} - An array of country codes that use this currency or null if none are found.
     *
     * @example
     * ```ts
     * const countries = CountryCurrencyCode.getCountriesByCurrencyCode('USD');
     * console.log(countries); // Output: ['US', 'UM']
     * ```
     */
    static getCountriesByCurrencyCode(currencyCode: string): string[] | null;
    /**
     * Returns a list of all available country codes.
     *
     * @returns {string[]} - An array of all available country codes.
     *
     * @example
     * ```ts
     * const countries = CountryCurrencyCode.getAllCountryCodes();
     * console.log(countries); // Output: ['AF', 'AL', 'DZ', ...]
     * ```
     */
    static getAllCountryCodes(): string[];
    /**
     * Returns a list of all unique currency codes.
     *
     * @returns {string[]} - An array of unique currency codes.
     *
     * @example
     * ```ts
     * const currencies = CountryCurrencyCode.getAllCurrencyCodes();
     * console.log(currencies); // Output: ['AFN', 'ALL', 'USD', ...]
     * ```
     */
    static getAllCurrencyCodes(): string[];
}