Return current Kepler supply, rounded to nearest unit Kepler.
go run .
curl http://127.0.0.1:10010/supply
44017000
usage: kepler-supply-api [<flags>]
Flags:
--help Show context-sensitive help (also try --help-long and --help-man).
--api="http://127.0.0.1:7413" kepler node API
--bind=":10010" API bind address