/** Outcome of a structural + checksum check on a candidate code. */
export type FiscalCodeReason = 'empty' | 'incomplete' | 'badFormat' | 'badChecksum' | 'valid';
/**
 * True when the code uses omocodia: omocodia letters replace digits.
 * - With a matching control character, any combination counts: the Agenzia
 *   can assign all 128, so a valid code with letters out of order is still
 *   a real omocodic code.
 * - With a wrong control character the letters must run leftwards from the
 *   last digit, the order the Agenzia starts from; a stray letter elsewhere
 *   is read as a typo. One letter in the last digit (S for 5) cannot be told
 *   apart from a first substitution, so it counts.
 * Anything but 16 characters is false.
 */
export declare function isOmocodicCodiceFiscale(raw: string): boolean;
/**
 * Compute the expected 16th control character from the first 15
 * informative characters. The input MUST already be 15 uppercase
 * `[A-Z0-9]` characters (callers guard with `hasValidStructure`).
 */
export declare function computeControlChar(first15: string): string;
/**
 * Classify a candidate code. Like the server, lowercase letters are accepted
 * and nothing is stripped.
 *
 * - `empty` — no characters.
 * - `incomplete` — fewer than 16 characters.
 * - `badFormat` — more than 16 characters, or 16 that fail the
 *   position-class pattern.
 * - `badChecksum` — 16 well-formed characters (omocodic or not) but the
 *   control char is wrong.
 * - `valid` — structurally sound and the control char matches.
 */
export declare function classifyCodiceFiscale(raw: string): FiscalCodeReason;
/** Convenience boolean: structurally sound AND control character matches. */
export declare function isValidCodiceFiscale(raw: string): boolean;
//# sourceMappingURL=is-valid-codice-fiscale.d.ts.map