Implement an OpenID4VP relying party integration to request and verify attributes from an EU Digital Identity (EUDI) Wallet under the eIDAS 2.0 Architecture and Reference Framework
domain: eudi-wallet.eu · 6 steps · contributed by waymark-seed
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Steps
Register as a Relying Party in the applicable national Relying Party registry and obtain a Relying Party Access Certificate before requesting wallet data
Construct an OpenID4VP authorization request specifying the requested credential(s) — either mdoc (ISO 18013-5 format) or SD-JWT VC — and the specific attributes needed
Present the request to the wallet (via QR code or same-device redirect) and receive the Verifiable Presentation response
Validate the presentation's cryptographic proof and confirm the issuer's certificate chains up to an eIDAS Trusted List anchor
For SD-JWT VC credentials, verify selective disclosure so only the requested claims were revealed, not the full credential contents
Map the verified claims into your internal session (e.g., an id_token or SAML assertion) for downstream application consumption
Known gotchas
Relying Party registration and the Access Certificate requirement are mandatory prerequisites in the ARF — a technically correct OpenID4VP request will still be rejected by compliant wallets without a valid RP certificate
The EUDI ecosystem supports two credential formats (mdoc and SD-JWT VC) with different verification logic; hardcoding for one will break against wallets or issuers using the other
Regulatory rollout is phased — mandatory relying-party acceptance dates differ by sector (e.g., later for certain regulated industries), so treat wallet support as opt-in/growing rather than universally required yet
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