Enum A2AError 

pub enum A2AError {
    TaskNotFound(String),
    TaskNotCancelable(String),
    PushNotificationNotSupported(String),
    UnsupportedOperation(String),
    ContentTypeNotSupported(String),
    InvalidAgentResponse(String),
    ExtendedAgentCardNotConfigured(String),
    ExtensionSupportRequired(String),
    VersionNotSupported(String),
    ParseError(String),
    InvalidRequest(String),
    MethodNotFound(String),
    InvalidParams(String),
    Internal(String),
    Serialization(Error),
    Http(Error),
}

Unified error type for A2A protocol, HTTP, and serialization failures.

Variants

TaskNotFound(String)

The requested task identifier does not exist.

TaskNotCancelable(String)

The requested task cannot transition to canceled.

PushNotificationNotSupported(String)

Push notifications are disabled or unsupported for this agent.

UnsupportedOperation(String)

The requested operation is not implemented.

ContentTypeNotSupported(String)

The request content type is not supported by the peer.

InvalidAgentResponse(String)

The remote agent returned an invalid response payload.

ExtendedAgentCardNotConfigured(String)

Extended agent card retrieval is not configured for the agent.

ExtensionSupportRequired(String)

A required extension is not supported by the peer.

VersionNotSupported(String)

The peer rejected the requested A2A protocol version.

ParseError(String)

The request body could not be parsed as valid JSON-RPC or JSON.

InvalidRequest(String)

The request shape is structurally invalid.

MethodNotFound(String)

The requested method or route does not exist.

InvalidParams(String)

The supplied parameters could not be deserialized or validated.

Internal(String)

An internal SDK or server error occurred.

Serialization(Error)

JSON serialization or deserialization failed locally.

Http(Error)

The underlying HTTP client returned an error.

Implementations

impl A2AError

pub fn reason(&self) -> &'static str

Return the stable structured reason name for this error.

pub fn code(&self) -> i32

Return the JSON-RPC error code associated with this error.

pub fn to_jsonrpc_error(&self) -> JsonRpcError

Convert this error into a JSON-RPC error object.

pub fn to_problem_details(&self) -> ProblemDetails

Convert this error into an RFC 9457-style HTTP problem payload.

pub fn status_code(&self) -> StatusCode

Return the HTTP status code associated with this error.

pub fn to_error_info(&self) -> ErrorInfo

Convert this error into a structured ErrorInfo detail.

pub fn from_problem_details(problem: &ProblemDetails) -> Self

Reconstruct an A2AError from HTTP problem details when possible.

pub fn from_error_info( error_code: i32, message: &str, info: Option<&ErrorInfo>, ) -> Self

Reconstruct an A2AError from structured error details when possible.

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.