execute
Executes the request to get root endpoint information.
Return
RootResponse containing server and network information
Throws
All the exceptions below are subclasses of NetworkException
if the request fails due to a bad request (4xx)
if the request fails due to a bad response from the server (5xx)
if the request fails due to too many requests sent to the server
when Horizon returns a Timeout or connection timeout occurred
if the server returns an unknown status code
when the request cannot be executed due to cancellation or connectivity problems