import { BaseSmsProvider } from './base-sms-provider.adapter';
export interface TwilioConfig {
    accountSid: string;
    authToken: string;
    fromPhoneNumber?: string;
    pollingInterval?: number;
}
/**
 * Twilio SMS provider adapter.
 * Uses Twilio API to receive SMS messages and extract OTP codes.
 */
export declare class TwilioProvider extends BaseSmsProvider {
    private client;
    private fromPhoneNumber;
    private pollingInterval;
    private lastCheckDate;
    constructor(config: TwilioConfig);
    /**
     * Initialize the Twilio client.
     */
    initialize(): Promise<void>;
    /**
     * Clean up Twilio resources.
     */
    cleanup(): Promise<void>;
    /**
     * Get a phone number for receiving SMS via Twilio.
     * Note: Twilio doesn't provide temporary phone numbers as easily as other services.
     * This method returns the configured "fromPhoneNumber" or throws an error if not set.
     * @returns A phone number in international format
     */
    getPhoneNumber(): Promise<string>;
    /**
     * Wait for an OTP code to be received via Twilio.
     * Uses polling to check for new messages.
     * @param phoneNumber The phone number to monitor (Twilio number that receives messages)
     * @param timeout Timeout in milliseconds (default: 30000)
     * @returns The extracted OTP code
     */
    waitForOtpCode(phoneNumber: string, timeout?: number): Promise<string>;
}