IsRequestSsz checks if the request object should be interpreted as ssz.

RespondWithSsz takes a http request and checks to see if it should be requesting a ssz response.

WriteError writes the error by manipulating headers and the body of the final response.

WriteJson writes the response message in JSON format.

WriteSsz writes the response message in ssz format.

DefaultJsonError is a JSON representation of a simple error value, containing only a message and an error code.