package application import ( "bytes" "github.com/pkg/errors" "source.quilibrium.com/quilibrium/monorepo/nekryptology/pkg/core/curves" "source.quilibrium.com/quilibrium/monorepo/node/protobufs" ) func (a *CeremonyApplication) applyLobbyJoin( join *protobufs.CeremonyLobbyJoin, ) error { signature := join.GetPublicKeySignatureEd448() if signature == nil { return errors.Wrap(errors.New("signature is nil"), "apply lobby join") } if join.IdentityKey == nil || join.IdentityKey.KeyValue == nil { return errors.Wrap(errors.New("identity key is nil"), "apply lobby join") } if join.SignedPreKey == nil || join.SignedPreKey.KeyValue == nil { return errors.Wrap(errors.New("signed prekey is nil"), "apply lobby join") } if _, err := curves.ED448().Point.FromAffineCompressed( join.IdentityKey.KeyValue, ); err != nil { return errors.Wrap(err, "apply lobby join") } if _, err := curves.ED448().Point.FromAffineCompressed( join.SignedPreKey.KeyValue, ); err != nil { return errors.Wrap(err, "apply lobby join") } if err := join.VerifySignature(); err != nil { return errors.Wrap(err, "apply lobby join") } if len(a.LobbyJoins) == 256 { return nil } for _, p := range a.LobbyJoins { if bytes.Equal( p.PublicKeySignatureEd448.PublicKey.KeyValue, signature.PublicKey.KeyValue, ) { return nil } } prepend := false nextRoundPreferredParticipants := []*protobufs.Ed448PublicKey{} for _, p := range a.NextRoundPreferredParticipants { if !bytes.Equal(p.KeyValue, signature.PublicKey.KeyValue) { nextRoundPreferredParticipants = append( nextRoundPreferredParticipants, p, ) } } if len(a.NextRoundPreferredParticipants) != len(nextRoundPreferredParticipants) { prepend = true } a.NextRoundPreferredParticipants = nextRoundPreferredParticipants if prepend { a.LobbyJoins = append( append([]*protobufs.CeremonyLobbyJoin{}, join), a.LobbyJoins..., ) } else { a.LobbyJoins = append(a.LobbyJoins, join) } return nil } func (a *CeremonyApplication) finalizeParticipantSet() error { power := uint64(1) for uint64(len(a.LobbyJoins)) > power { power = power << 1 } if power != uint64(len(a.LobbyJoins)) { power = power >> 1 } a.ActiveParticipants = []*protobufs.Ed448PublicKey{} for i := 0; i < int(power); i++ { a.ActiveParticipants = append( a.ActiveParticipants, a.LobbyJoins[i].PublicKeySignatureEd448.PublicKey, ) } return nil }