/**
 * IBAN validation and formatting (ISO 13616).
 *
 * Validity is the real ISO 7064 mod-97 checksum — not a regex guess — plus a
 * country length check from the SWIFT IBAN registry. Length is only enforced
 * for countries in {@link IBAN_LENGTHS}; others still get the checksum + the
 * general 15–34 character bound, so unknown-country IBANs are never wrongly
 * accepted on checksum alone.
 */
/**
 * Total IBAN length per country (ISO 3166-1 alpha-2), from the SWIFT registry.
 * Covers the Arab League countries that issue IBANs plus common partners.
 */
declare const IBAN_LENGTHS: Readonly<Record<string, number>>;
/** Strip spaces and upper-case — the canonical electronic IBAN form. */
declare function normalizeIBAN(iban: string): string;
/**
 * Validate an IBAN: structure, registry length (when known), and the mod-97
 * checksum.
 *
 * @example isValidIBAN("SA03 8000 0000 6080 1016 7519") // true
 * @example isValidIBAN("SA03 8000 0000 6080 1016 7510") // false (bad checksum)
 */
declare function isValidIBAN(iban: string): boolean;
interface FormatIBANOptions {
    /** Group separator. Default a single space (`"SA03 8000 …"`). */
    separator?: string;
}
/**
 * Format an IBAN into groups of four for display.
 *
 * @example formatIBAN("SA0380000000608010167519") // "SA03 8000 0000 6080 1016 7519"
 */
declare function formatIBAN(iban: string, options?: FormatIBANOptions): string;

/**
 * Saudi national ID / Iqama validation.
 *
 * A Saudi ID is 10 digits whose leading digit encodes the holder type
 * (1 = citizen / national ID, 2 = resident / Iqama) and whose final digit is a
 * Luhn (ISO 7064 mod-10) check digit computed left-to-right over all ten digits.
 */
type SaudiIdType = "citizen" | "resident";
/**
 * Validate a Saudi national ID or Iqama number (10 digits, leading 1 or 2,
 * correct Luhn check digit).
 *
 * @example isValidSaudiId("1012345672") // true  (citizen)
 * @example isValidSaudiId("2100000005") // true  (resident / Iqama)
 * @example isValidSaudiId("1012345671") // false (bad check digit)
 */
declare function isValidSaudiId(id: string): boolean;
/**
 * Holder type from the leading digit, or `null` when the ID is invalid.
 *
 * @example saudiIdType("1012345672") // "citizen"
 * @example saudiIdType("2100000005") // "resident"
 */
declare function saudiIdType(id: string): SaudiIdType | null;

export { type FormatIBANOptions, IBAN_LENGTHS, type SaudiIdType, formatIBAN, isValidIBAN, isValidSaudiId, normalizeIBAN, saudiIdType };