Struct Frame 

pub struct Frame<P> {
    pub v: u32,
    pub id: u64,
    pub reply_to: Option<u64>,
    pub session: SessionId,
    pub sender: Option<SessionId>,
    pub body: P,
}

Versioned, addressed envelope around a Request or an AgentEvent.

Generic over the body so the same frame carries either direction: the request-to-a-session frame and the event-from-a-session frame have identical headers. The body is #[serde(flatten)]ed, so on the wire a frame is one flat JSON object — {"v":1,"id":7,"session":"s1","type":"cancel"}.

Fields

v: u32

Protocol major version (PROTOCOL_VERSION).

id: u64

Sender-assigned id, monotonic per connection; answers echo it in reply_to.

reply_to: Option<u64>

The request this frame answers, if any. Streaming events that are not direct replies leave it absent.

session: SessionId

The session this frame concerns — the target of a request, the origin of an event. The whole addressing scheme.

sender: Option<SessionId>

The sender’s address, when it is not the transport’s own client (an in-process handle leaves it unset; an A2A peer sets its "agent:<id>").

body: P

Implementations

impl<P> Frame<P>

pub fn new(id: u64, session: SessionId, body: P) -> Self

A fresh top-level frame at the current version, not a reply.

Trait Implementations

impl<P: Clone> Clone for Frame<P>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<P: Debug> Debug for Frame<P>

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

Formats the value using the given formatter.

impl<'de, P> Deserialize<'de> for Frame<P>

where P: Deserialize<'de>,

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<P: PartialEq> PartialEq for Frame<P>

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

Equality operator ==.

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

Inequality operator !=.

impl<P> Serialize for Frame<P>

where P: Serialize,

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl<P: PartialEq> StructuralPartialEq for Frame<P>