How to correctly transmit error details to client with gRPC-Json transcoding?

[Sayan751]

I have a gRPC service with JSON transcoding enabled. An endpoint of the service throws RpcException with same status code but different metadata. Examples:

throw new RpcException(new Status(StatusCode.InvalidArgument, "Whatever1"), new Metadata
{
    { "Code", Errors.Error1.ToString() }
});

throw new RpcException(new Status(StatusCode.InvalidArgument, "Whatever2"), new Metadata
{
    { "Code", Errors.Error2.ToString() }
});

Whoever, when I am making an HTTP call to the service, then I am getting the following:

{
  "code": 3,
  "message": "Whatever1",
  "details": []
}

I expected the trailers to appear in the details array. Am I missing something here? At the end, I need a way to differentiate between the two errors with the same status code. Is that possible?

[Xyncgas]

that's weird, different error message should be sent to you already, in the header

[gfoidl]

Let's continue in #49196