In the “Error Handling in gRPC” section (page 63 of the print version) it is said that we should use error codes from the codes package to ensure consistency across gRPC implementations. However, when the code for the actual error is shown, a hardcoded code of “404” is used.
The function New from the status package is called instead of Error but they both accept a codes.Code interface as their first argument. Is there any difference or a particular reason why it was hardcoded?