Struct EventEnvelope 

pub struct EventEnvelope {
    pub schema_version: String,
    pub session_id: Uuid,
    pub seq: u64,
    pub timestamp: DateTime<Utc>,
    pub kind: String,
    pub payload: Value,
    pub prev_hash: Option<String>,
    pub hash: String,
}

One append-only, hash-chained session event.

Fields

schema_version: String

External schema version.

session_id: Uuid

Session identifier.

seq: u64

Zero-based monotonic event sequence.

timestamp: DateTime<Utc>

Event timestamp.

kind: String

Extensible dotted event name.

payload: Value

Event-specific public payload.

prev_hash: Option<String>

Hash of the previous event, absent for the genesis event.

hash: String

BLAKE3 digest of canonical hash material.

Implementations

impl EventEnvelope

pub fn new( session_id: Uuid, seq: u64, kind: impl Into<String>, payload: Value, prev_hash: Option<String>, ) -> Self

Creates an event using the current UTC time.

pub fn new_at( session_id: Uuid, seq: u64, timestamp: DateTime<Utc>, kind: impl Into<String>, payload: Value, prev_hash: Option<String>, ) -> Self

Creates an event at a supplied time, primarily for deterministic fixtures.

pub fn verify_hash(&self) -> bool

Verifies this event’s digest without looking at neighbors.

Trait Implementations

impl Clone for EventEnvelope

fn clone(&self) -> EventEnvelope

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EventEnvelope

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for EventEnvelope

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for EventEnvelope

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for EventEnvelope

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for EventEnvelope