Struct Message 

pub struct Message {
    pub message_id: String,
    pub context_id: Option<String>,
    pub task_id: Option<String>,
    pub role: Role,
    pub parts: Vec<Part>,
    pub metadata: Option<JsonObject>,
    pub extensions: Vec<String>,
    pub reference_task_ids: Vec<String>,
}

Protocol message exchanged between user and agent.

Fields

message_id: String

Unique message identifier.

context_id: Option<String>

Optional conversation context identifier.

task_id: Option<String>

Optional task identifier associated with the message.

role: Role

Message author role.

parts: Vec<Part>

Ordered message parts.

metadata: Option<JsonObject>

Optional message metadata.

extensions: Vec<String>

Extension URIs attached to the message.

reference_task_ids: Vec<String>

Related task identifiers referenced by the message.

Implementations

impl Message

pub fn auth_required_metadata( &self, ) -> Result<Option<AuthRequiredMetadata>, A2AError>

Parse TASK_STATE_AUTH_REQUIRED metadata from this message, if present.

This helper is intended for messages already known to participate in the auth-required flow. If metadata exists but does not match the AuthRequiredMetadata schema, this returns Err rather than Ok(None).

pub fn set_auth_required_metadata( &mut self, metadata: AuthRequiredMetadata, ) -> Result<(), A2AError>

Replace this message’s metadata with the auth-required convention payload.

impl Message

pub fn validate(&self) -> Result<(), A2AError>

Validate that the message contains at least one valid part.

Trait Implementations

impl Clone for Message

fn clone(&self) -> Message

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Message

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Message

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for Message

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

where __S: Serializer,

Serialize this value into the given Serde serializer.