Struct AttestationPreimage 

pub struct AttestationPreimage {
    pub schema_version: u16,
    pub source: SourceIdentity,
    pub event_id: String,
    pub payload_hash: String,
    pub session_id: String,
    pub ledger_id: String,
    pub lineage: LineageBinding,
    pub signed_at: DateTime<Utc>,
    pub key_id: String,
}

All material that goes into the Ed25519 signature for an attestation.

Field order in this struct mirrors the canonical byte order of canonical_signing_input; do not reorder without bumping SCHEMA_VERSION_ATTESTATION.

Fields

schema_version: u16

Attestation schema version (governs the canonical encoding only). Verifiers MUST fail closed on values they do not understand.

source: SourceIdentity

Source identity (variant + source-specific fields, excluding any nested attestation blob — see ADR 0014 §“Signed preimage”).

event_id: String

Stable event identifier (evt_…).

payload_hash: String

Hex-encoded BLAKE3 hash of the canonical event payload.

session_id: String

Session identifier (free-form). Stops cross-session replay.

ledger_id: String

Ledger identifier / session-scoped ledger namespace. Stops cross-ledger replay.

lineage: LineageBinding

Lineage binding (chain position OR previous hash). See LineageBinding.

signed_at: DateTime<Utc>

When the signature was produced (UTC). Encoded as RFC 3339 / ISO 8601 — the format is fixed by canonical_signing_input.

key_id: String

Public-key fingerprint of the signing key. Binds the signature to the declared key.

Trait Implementations

impl Clone for AttestationPreimage

fn clone(&self) -> AttestationPreimage

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AttestationPreimage

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

Formats the value using the given formatter.

impl PartialEq for AttestationPreimage

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for AttestationPreimage

impl StructuralPartialEq for AttestationPreimage