import type { AddressType } from '../dto/types/vat.js';
export interface IVatProvider {
    /**
     * Retrieves company address for the given VAT number.
     *
     * @param {string} vatNumber - The VAT number to look up.
     *
     * @returns {Promise<AddressType | null | undefined>} The company address if valid,
     * null if the VAT number is permanently invalid/rejected,
     * or undefined if the lookup failed due to a transient error (e.g. service unavailable).
     */
    getVat(vatNumber: string): Promise<AddressType | null | undefined>;
}