/**
 * Calculates the check digit of a CLABE based on the first 17 digits.
 * @param clabe17 string with exactly 17 digits (only numbers)
 * @returns check digit number (0..9)
 * @throws Error if input does not have 17 numeric digits
 */
export declare function computeClabeCheckDigit(clabe17: string): number;
/**
 * Validates a Mexican CLABE.
 * Accepts string (can contain spaces or dashes, it is normalized).
 * @param clabe string with the CLABE to validate
 * @returns true if valid, false otherwise
 */
export declare function validateAccountNumberCLABE(clabe: string, path: string): void | never;
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