Changes to Get contract

removed the enum value b3 from the path request parameter chain

removed the enum value blast from the path request parameter chain

added the new enum value stablechain to the path request parameter chain

added the media type */* for the response with the status 400

added the media type */* for the response with the status 404

added the optional property code to the response with the 401 status

added the optional property code to the response with the 403 status

added the optional property code to the response with the 409 status