// GetDiscovery gets the Discovery client for ttnctl
func GetDiscovery(ctx log.Interface) (*grpc.ClientConn, discovery.DiscoveryClient) {
path := path.Join(GetDataDir(), "/ca.cert")
cert, err := ioutil.ReadFile(path)
if err == nil && !api.RootCAs.AppendCertsFromPEM(cert) {
ctx.Warnf("Could not add root certificates from %s", path)
}
conn, err := api.Dial(viper.GetString("discovery-address"))
if err != nil {
ctx.WithError(err).Fatal("Could not connect to Discovery server")
}
return conn, discovery.NewDiscoveryClient(conn)
}