import { ISmsProvider } from '../interfaces/sms-provider.interface';
/**
 * Abstract base class for SMS provider implementations.
 * Provides common functionality and enforces implementation of the ISmsProvider interface.
 */
export declare abstract class BaseSmsProvider implements ISmsProvider {
    protected config: Record<string, any>;
    /**
     * Create a new SMS provider instance.
     * @param config Configuration options for the provider
     */
    constructor(config?: Record<string, any>);
    /**
     * Initialize the SMS provider.
     * This method should be overridden by concrete implementations.
     */
    initialize(): Promise<void>;
    /**
     * Clean up resources used by the provider.
     * This method should be overridden by concrete implementations if necessary.
     */
    cleanup(): Promise<void>;
    /**
     * Get a phone number for receiving SMS.
     * Must be implemented by concrete implementations.
     */
    abstract getPhoneNumber(): Promise<string>;
    /**
     * Wait for and extract an OTP code from an SMS message.
     * Must be implemented by concrete implementations.
     * @param phoneNumber The phone number to monitor for SMS
     * @param timeout Timeout in milliseconds
     */
    abstract waitForOtpCode(phoneNumber: string, timeout?: number): Promise<string>;
}