/**
 * Utility class for extracting OTP codes from text messages.
 */
export declare class OtpExtractor {
    /**
     * Extract an OTP code from a message using a regular expression.
     *
     * @param message The message text to extract the OTP from
     * @param pattern Optional custom regex pattern, defaults to common OTP patterns
     * @returns The extracted OTP code or null if not found
     */
    static extractOtp(message: string, pattern?: RegExp): string | null;
    /**
     * Attempts to extract an OTP code using multiple common patterns.
     *
     * @param message The message text to extract the OTP from
     * @returns The extracted OTP code or null if not found
     */
    static extractOtpWithFallback(message: string): string | null;
}