Enum A2AError 

pub enum A2AError {
    DiscoveryFailed(String),
    InvalidAgentCard(String),
    Transport(Error),
    Serialization(Error),
    JsonRpc {
        code: i64,
        message: String,
        data: Option<Value>,
    },
    TaskNotFound(String),
    TaskRejected(String),
    TaskFailed(String),
    AuthRequired(String),
    StreamingError(String),
    PushNotificationError(String),
    InvalidUrl(ParseError),
    Timeout(Duration),
    Unsupported(String),
}

Errors that can occur when using the A2A protocol.

Variants

DiscoveryFailed(String)

Failed to discover the agent card at the well-known endpoint.

InvalidAgentCard(String)

The agent card is invalid or missing required fields.

Transport(Error)

HTTP transport error.

Serialization(Error)

JSON serialization/deserialization error.

JsonRpc

The remote agent returned a JSON-RPC error.

Fields

code: i64

message: String

data: Option<Value>

TaskNotFound(String)

The task was not found.

TaskRejected(String)

The task was rejected by the remote agent.

TaskFailed(String)

The task failed during execution.

AuthRequired(String)

The task requires authentication.

StreamingError(String)

Streaming error (SSE).

PushNotificationError(String)

Push notification configuration error.

InvalidUrl(ParseError)

URL parsing error.

Timeout(Duration)

Timeout waiting for task completion.

Unsupported(String)

The operation is not supported by the remote agent.

Trait Implementations

impl Debug for A2AError

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

Formats the value using the given formatter.

impl Display for A2AError

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

Formats the value using the given formatter.

impl Error for A2AError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<Error> for A2AError

fn from(source: Error) -> Self

Converts to this type from the input type.

impl From<Error> for A2AError

fn from(source: Error) -> Self

Converts to this type from the input type.

impl From<ParseError> for A2AError

fn from(source: ParseError) -> Self

Converts to this type from the input type.