/**
 * Provides a set of methods to compute swiss social security numbers' checksums
 * and check their validity.
 */
export declare class AHV13 {
    /**
     * Compute the checksum for a given social security number.
     *
     * @param ahv12 - Social security number **without its checksum** (aka AHV12)
     * @returns The social security number's checksum
     */
    private calculateCheckSum;
    /**
     * Remove the '.' characters and reverse the social security number
     *
     * @param arr - Social security number
     * @returns The social security number **reversed and in the form of an
     * array**
     */
    private preProcessArray;
    /**
     * Parse the social security number and return its checksum
     *
     * # Example
     *
     * ```ts
     * const validator = new AHV13();
     * const checksum = validator.checkSum('756.9217.0769.8');
     *
     * console.log(checksum); // 5
     * ```
     *
     * @param ahvNumber12 - Social security number **without its checksum**
     * @returns The social security number's checksum
     */
    checkSum(ahvNumber12: string): number;
    /**
     * Validate a AHV13 Number with or without dots in the form of '756.9217.0769.85'
     *
     * # Example
     *
     * ```ts
     * const validator = new AHV13();
     *
     * console.log(validator.isValid("756.9217.0769.85")) // true
     * console.log(validator.isValid("756.9217.0769.82")) // false
     * ```
     *
     * @param ahv13 -  Social security number **with its checksum**
     * @returns `true` if the number is valid. `false` otherwise.
     */
    isValid(ahv13: string): boolean;
}