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docs(changelog): name the openid4vci surface and the consumer's obligations #148

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luisgf merged 1 commit into from
Jul 27, 2026
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docs(changelog): name the openid4vci surface and the consumer's obligations #148

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17 changes: 17 additions & 0 deletions CHANGELOG.md
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Expand Up @@ -42,6 +42,23 @@ All notable changes to **openvc** are documented here. The format follows
verification* — not "issuance", and not HAIP, which additionally requires DPoP, key
attestations and client authentication. No new runtime dependency.

The public surface is `verify_credential_request_proofs`,
`parse_credential_request`, `CredentialRequest`, `VerifiedProof`, `ConsumeNonce`,
`ResolveProofKey`, `OpenID4VCIError`, `CredentialRequestMalformed`,
`UnsupportedProofType`, `ProofReplayed`, `PROOF_TYPE_JWT`, `PROOF_TYP`,
`DEFAULT_PROOF_MAX_AGE_S` and `MAX_PROOF_BYTES`.

Two obligations come with it, both load-bearing and both the integrator's
([ADR-0007](https://github.com/luisgf/openvc/blob/main/docs/adr/ADR-0007-oid4vci-issuer-side.md)).
**`check_nonce` must be atomic** — a Redis `SET … NX` or a SQL
`DELETE … RETURNING`, never a read-then-write, under which two concurrent requests
both observe the nonce as unused and the replay window core cannot close on your
behalf re-opens. `openvc.cache.TtlCache` is explicitly **not** suitable: it
documents its own lack of single-flight, benign for a read cache and fatal for a
single-use token. And **codes and identifiers are yours to mint** — core generates
no pre-authorized code, `transaction_id` or `notification_id`; they are opaque
values with no bytes for openvc to get right.

- **RFC 7638 JWK Thumbprint** ([#140](https://github.com/luisgf/openvc/issues/140)).
`openvc.keys` grows `jwk_thumbprint` (base64url) and `jwk_thumbprint_bytes` (the
raw digest), covering `EC`, `OKP`, `RSA` and `oct` keys. The canonical form is
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