// Makes a Host, an Roster, and a service func makeHELS(local *onet.LocalTest, nbr int) ([]*onet.Conode, *onet.Roster, *Service) { hosts := local.GenConodes(nbr) el := local.GenRosterFromHost(hosts...) return hosts, el, local.Services[hosts[0].ServerIdentity.ID][skipchainSID].(*Service) }