entegre/entegre-ets-sdk

The Entegre ETS SDK is a TypeScript/JavaScript library for integrating with Turkey's e-invoice, e-archive, e-waybill, and e-receipt systems. It provides a builder pattern for creating invoices, automatic calculations for VAT and withholding taxes, and comprehensive validation for Turkish tax IDs and IBANs. The SDK supports multiple integrators including Uyumsoft, İzibiz, and Doğan, and includes features like batch processing, webhooks for status updates, and a CLI tool. It's designed for developers building applications that need to send or receive electronic documents in compliance with Turkish tax regulations.