type SendResult = {
    sent: SendMessageResult[];
    failed: SendMessageResult[];
};
type SendMessageResult = {
    phone: string;
    error?: string;
};

declare class SMSSenderService {
    /**
     * Send a message to one or more phones.
     * @param phones - phone numbers to send to
     * @param message - message to send
     * @returns {Promise<SendResult>} Send result.
     */
    send(phones: string[], message: string): Promise<SendResult>;
    static checkStatus(): Promise<boolean>;
}

export { SMSSenderService, type SendResult };