viesapi-client

import { VIESAPIClient, EUVAT } from 'viesapi-client'; const API_ID = process.env.VIESAPI_ID ?? ''; const API_KEY = process.env.VIESAPI_KEY ?? ''; async function validateVatNumber(vatNumber: string) { let client: VIESAPIClient; // Instantiate client for test mode if no credentials are provided // The test environment has specific VAT numbers it will respond to successfully. if (!API_ID || !API_KEY) { console.warn('VIESAPI_ID or VIESAPI_KEY not set. Using test environment.'); client = new VIESAPIClient(); // Test mode constructor } else { client = new VIESAPIClient(API_ID, API_KEY); // Production mode } // Optionally set a custom application identifier for tracking client.setApp('MyAwesomeApp/1.0'); // Local validation first for basic format checks if (!EUVAT.isValid(vatNumber)) { console.error(`Error: Invalid EU VAT number format for ${vatNumber}.`) return; } try { console.log(`Checking VAT number: ${vatNumber}...`); const viesData = await client.getVIESData(vatNumber); if (viesData.valid) { console.log(`VAT number ${vatNumber} is VALID.`); console.log(`Company Name: ${viesData.traderName}`); console.log(`Address: ${viesData.traderAddress}`); } else { console.log(`VAT number ${vatNumber} is INVALID or not found.`); console.log(`UID: ${viesData.uid}`); // Unique ID of the query } } catch (error: any) { console.error(`Failed to validate VAT number ${vatNumber}:`, error.message); if (error.status === 401) { console.error('Check your API ID and Key. They might be incorrect or missing for production environment.'); } } } // Example usage with a test VAT number for the VIES API test environment validateVatNumber('PL7171642051'); // Example with an invalid VAT number (will fail local validation) // validateVatNumber('DE12345'); // Example for a production key (replace with actual values in .env or similar) // validateVatNumber('FR10402571889');