ActionHandlerError

The Cause

An error occurred while executing an action handler. This error wraps the underlying error that was thrown by your action handler code.

Actions are request-response style operations in Thymian’s event system. When an action handler throws an error, it’s caught and wrapped to provide context about which action failed.

The Solution

To debug this error:

1. Check the error cause: The original error is available in the cause property

2. Review the action handler: Look at the handler registered for the action name mentioned in the error

3. Verify action parameters: Ensure the action is being called with valid parameters

4. Add error handling: Consider adding try-catch blocks in your action handlers

Example of a robust action handler:

emitter.onAction('my.action', async (params, ctx) => {
  try {
    // Validate parameters
    if (!params.required) {
      return ctx.error(new Error('Missing required parameter'));
    }

    // Perform action
    const result = await performOperation(params);

    // Reply with result
    ctx.reply(result);
  } catch (error) {
    // Handle errors gracefully
    ctx.error(error);
  }
});

The error message will include the action name and source to help you identify which handler is causing the problem.