OpenDPP webhook event types + a zero-dependency, constant-time HMAC-SHA256 signature verifier for inbound OpenDPP webhooks (ESM, Node >=26).

Pure, zero-dependency GS1 Digital Link URI builders and GS1 mod-10 check-digit helpers — validate AND mint GTIN-14/GLN-13 (ESM, Node >=26). Extracted from the OpenDPP Digital Product Passport service.

Pure, zero-dependency CSV → passport reference mapper for the OpenDPP Digital Product Passport API (ESM, Node >=26). Maps parsed CSV rows to the public passport-create shape; bring your own RFC-4180 parser.

Official TypeScript SDK for the OpenDPP Digital Product Passport API — a fully-typed client generated from the public OpenAPI contract (ESM, Node >=20). Zero runtime dependencies; version-locked to the API contract.

Deterministic synthetic sample-passport and EPCIS-shaped event-chain generator for the OpenDPP Digital Product Passport API — category-valid ESPR sample data for every category the public contract recognises (ESM, Node >=26).

EORI number validation against the European Commission's official EOS validation web service, plus pure offline EORI syntax/parse helpers (ESM, Node >=26). From the OpenDPP Digital Product Passport service.

Authorised Economic Operator (AEO) lookup against the European Commission's official EOS aeo-retrieve web service, plus pure offline AEO helpers (ESM, Node >=26). From the OpenDPP Digital Product Passport service.

EU VAT-ID validation against the European Commission's official VIES service, plus pure offline VAT-number syntax/parse helpers (ESM, Node >=26). From the OpenDPP Digital Product Passport service.