Struct FrameAttestation 

pub struct FrameAttestation {
    pub frame: FrameId,
    pub attestation: Option<ProvenanceAttestation>,
    pub inclusion_proof: Option<InclusionProof>,
}

The one FrameAttestation (SPEC.md §6.5.5). It is defined in contextgraph-types because it is a wire type that rides ContextQueryResult, and it is re-exported here so a host author has one import rather than two. This crate briefly defined two more of its own; see #161. What a result set says about one frame’s attestation — the wire carrier that keeps a ProvenanceAttestation beside the frame it covers (SPEC.md §6.5.5, F11).

Why the identity is echoed in full

A parallel array indexed by position would be smaller and unusable as evidence: a provider that reorders, omits, or duplicates a frame would shift an attestation onto the wrong one, and a host filtering the set — which is the normal case — would have to re-derive the mapping from an order nobody wrote down. Carrying the whole FrameId triple makes an entry self-describing, which is the same reasoning FrameVerdict already applies to context/verify. It is also exactly what a verifier needs: provider_id and content_digest are two of the three inputs to frame_commitment, and neither is recoverable from the frame body alone.

Why both members are optional

The cheapest honest way to sign an answer is one signature over the result-set Merkle root, with a per-frame inclusion proof and no per-frame signature at all. Requiring attestation would make that shape unrepresentable and force a provider into n signatures to say what one says. Requiring inclusion_proof would tax a provider that signs frames individually and publishes no root. An entry carrying neither is noise, and carries_evidence is how a host says so.

Fields

frame: FrameId

The frame this entry attests, named in full rather than by position.

attestation: Option<ProvenanceAttestation>

A detached signature over this frame’s own frame_commitment.

Absent when the provider signed only the result-set root: the frame is then attested through inclusion_proof, not on its own.

inclusion_proof: Option<InclusionProof>

A proof that this frame’s commitment is a leaf of the signed result_attestation root (SPEC.md §6.5.3).

Optional on the wire, and the reason is a host that keeps a subset: once frames are dropped their sibling commitments are gone, and the root can never be recomputed again. See ADR 0014.

Implementations

impl FrameAttestation

pub fn signed( frame: FrameId, attestation: ProvenanceAttestation, ) -> FrameAttestation

A per-frame signature with no inclusion proof.

pub fn proven( frame: FrameId, inclusion_proof: InclusionProof, ) -> FrameAttestation

Membership of a signed result set, with no per-frame signature.

pub fn carries_evidence(&self) -> bool

Whether this entry carries anything a verifier can act on.

An entry with neither a signature nor a proof names a frame and asserts nothing about it. A host MUST NOT read that as attested — it is wire noise, and F9’s “unverifiable degrades to unattested” covers it.

pub fn with_inclusion_proof(self, proof: InclusionProof) -> FrameAttestation

Attach an inclusion proof, so a per-frame signature and result-set membership travel together.

Trait Implementations

impl Clone for FrameAttestation

fn clone(&self) -> FrameAttestation

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for FrameAttestation

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for FrameAttestation

fn deserialize<__D>( __deserializer: __D, ) -> Result<FrameAttestation, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for FrameAttestation

impl PartialEq for FrameAttestation

fn eq(&self, other: &FrameAttestation) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for FrameAttestation

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for FrameAttestation