How to convert aws_sdk_s3::Error to lambda_runtime::Error?

[evbo]

I'm running my lambda as part of an AWS Step Function and need to handle retry logic by returning Error but I'm a little confused by which error to return. For instance, both aws_sdk_s3::Error and lambda_runtime::Error seem to resolve to the same type?:

async fn show_objects(client: &Client, bucket: &str) -> Result<(), lambda_runtime::Error> {
  let resp = client.list_objects_v2().bucket(bucket).send().await?; // returns result with `aws_sdk_s3::Error`

  for object in resp.contents().unwrap_or_default() {
      println!("{}", object.key().unwrap_or_default());
  }

  Ok(())
}

So which error type should I return and how can I instantiate an Error based on some of my own this:error types? Do I just map_error and wrap the exception message in lambda_runtime::Error?

[evbo]

ah, it appears the Error types are both just Box<dyn Error>, silly me. You can simply do:

.map_err(|e| {
  let backToLambdaError: Error = String::from("error message").into();
  backToLambdaError
});

[github-actions[bot]]

Hello! Reopening this discussion to make it searchable.