Electrum returns a null result, and null error on ping. However,
dart completeError bans the return of nulls. Also, a null response
is not an error in this case. Thus, we just want to return null as
a good response except when error is explicitly set as a response
by the electrum server.
Electrum returns a null result, and null error on
ping.However, dart completeError bans the return of nulls. Also, a null response is not an error in this case. Thus, we just want to return null as a good response except whenerroris explicitly set as a response by the electrum server.