export declare class WhatsappService {
    private readonly logger;
    private readonly enabled;
    private readonly baseUrl;
    private readonly apiKey;
    private readonly instance;
    constructor();
    sendText(phoneNumber: string, message: string): Promise<{
        success: boolean;
        error?: string;
        messageId?: string;
    }>;
    sendToMany(recipients: Array<{
        phone_number?: string | null;
        id?: number;
    }>, message: string): Promise<{
        sent: number;
        failed: number;
    }>;
}