import Joi from 'joi';
declare const schema: Joi.ObjectSchema<any>;
interface UserSubscription {
    hashId: string;
    objectType: 'supplierReportType' | 'deviceType' | 'supplierWebhook' | 'supplierCertificate';
    objectHashId: string;
    lastNotification: Date | null;
    alertsSinceLastNotification: number;
    createdAt: Date;
}
export { schema, UserSubscription };