title: Core. A2 A Error

A2A Node SDK - v0.1.0 / Modules / Core / A2AError

Class: A2AError

Core.A2AError

Standard error class for A2A SDK

This is the base error class for all errors in the A2A SDK. It includes an error code and optional data payload for additional context. The implementation matches the Python SDK for cross-language compatibility.

Example

// Create a basic error
const error = new A2AError('Something went wrong', -32000);
 
// Create an error with additional context data
const errorWithData = new A2AError(
  'Failed to process task', 
  -32014, 
  { taskId: '123', reason: 'Invalid input' }
);
 
// Error can be serialized to JSON
console.log(JSON.stringify(error));
// {"code":-32000,"message":"Something went wrong"}

Hierarchy

• Error

  ↳ A2AError

  ↳↳ InvalidTaskStateError

  ↳↳ TaskNotFoundError

  ↳↳ TaskAlreadyCompletedError

  ↳↳ TaskCanceledError

  ↳↳ TaskFailedError

Table of contents

Constructors

• constructor

Properties

• code
• data
• message
• name
• stack
• stackTraceLimit

Methods

• captureStackTrace
• prepareStackTrace
• toJSON

Constructors

constructor

• new A2AError(message, code, data?): A2AError

Creates a new A2A error

Parameters

Returns

A2AError

Overrides

Error.constructor

Properties

code

• Readonly code: number

Numeric error code (typically negative, see ERROR_CODES)

data

• Optional Readonly data: Record<string, unknown>

Optional additional context data for the error

message

• message: string

Inherited from

Error.message

name

• name: string

Inherited from

Error.name

stack

• Optional stack: string

Inherited from

Error.stack

stackTraceLimit

▪ Static stackTraceLimit: number

The Error.stackTraceLimit property specifies the number of stack frames collected by a stack trace (whether generated by new Error().stack or Error.captureStackTrace(obj)).

The default value is 10 but may be set to any valid JavaScript number. Changes will affect any stack trace captured after the value has been changed.

If set to a non-number value, or set to a negative number, stack traces will not capture any frames.

Inherited from

Error.stackTraceLimit

Methods

captureStackTrace

▸ captureStackTrace(targetObject, constructorOpt?): void

Creates a .stack property on targetObject, which when accessed returns a string representing the location in the code at which Error.captureStackTrace() was called.

const myObject = {};
Error.captureStackTrace(myObject);
myObject.stack;  // Similar to `new Error().stack`

The first line of the trace will be prefixed with ${myObject.name}: ${myObject.message}.

The optional constructorOpt argument accepts a function. If given, all frames above constructorOpt, including constructorOpt, will be omitted from the generated stack trace.

The constructorOpt argument is useful for hiding implementation details of error generation from the user. For instance:

function a() {
  b();
}
 
function b() {
  c();
}
 
function c() {
  // Create an error without stack trace to avoid calculating the stack trace twice.
  const { stackTraceLimit } = Error;
  Error.stackTraceLimit = 0;
  const error = new Error();
  Error.stackTraceLimit = stackTraceLimit;
 
  // Capture the stack trace above function b
  Error.captureStackTrace(error, b); // Neither function c, nor b is included in the stack trace
  throw error;
}
 
a();

Parameters

Returns

void

Inherited from

Error.captureStackTrace

prepareStackTrace

▸ prepareStackTrace(err, stackTraces): any

Parameters

Returns

any

See

https://v8.dev/docs/stack-trace-api#customizing-stack-traces

Inherited from

Error.prepareStackTrace

toJSON

▸ toJSON(): Object

Converts the error to a JSON-serializable object

Returns

Object

JSON representation of the error