package innerring import ( "crypto/ecdsa" "crypto/elliptic" "errors" "fmt" "github.com/nspcc-dev/neo-go/pkg/core/mempoolevent" "github.com/nspcc-dev/neo-go/pkg/crypto/keys" irsubnet "github.com/nspcc-dev/neofs-node/pkg/innerring/processors/subnet" morphsubnet "github.com/nspcc-dev/neofs-node/pkg/morph/client/subnet" "github.com/nspcc-dev/neofs-node/pkg/morph/event" subnetevents "github.com/nspcc-dev/neofs-node/pkg/morph/event/subnet" "github.com/nspcc-dev/neofs-node/pkg/util" "github.com/nspcc-dev/neofs-sdk-go/owner" "github.com/nspcc-dev/neofs-sdk-go/subnet" subnetid "github.com/nspcc-dev/neofs-sdk-go/subnet/id" "github.com/panjf2000/ants/v2" "go.uber.org/zap" ) // IR server's component to handle Subnet contract notifications. type subnetHandler struct { workerPool util.WorkerPool morphClient morphsubnet.Client putValidator irsubnet.PutValidator delValidator irsubnet.DeleteValidator } // configuration of subnet component. type subnetConfig struct { queueSize uint32 } // makes IR server to catch Subnet notifications from sidechain listener, // and to release corresponding processing queue on stop. func (s *Server) initSubnet(cfg subnetConfig) { s.registerStarter(func() error { var err error // initialize queue for processing of the events from Subnet contract s.subnetHandler.workerPool, err = ants.NewPool(int(cfg.queueSize), ants.WithNonblocking(true)) if err != nil { return fmt.Errorf("subnet queue initialization: %w", err) } // initialize morph client of Subnet contract clientMode := morphsubnet.NotaryAlphabet if s.sideNotaryConfig.disabled { clientMode = morphsubnet.NonNotary } var initPrm morphsubnet.InitPrm initPrm.SetBaseClient(s.morphClient) initPrm.SetContractAddress(s.contracts.subnet) initPrm.SetMode(clientMode) err = s.subnetHandler.morphClient.Init(initPrm) if err != nil { return fmt.Errorf("init morph subnet client: %w", err) } s.listenSubnet() return nil }) s.registerCloser(func() error { s.stopSubnet() return nil }) } // releases the Subnet contract notification processing queue. func (s *Server) stopSubnet() { s.workerPool.Release() } // names of listened notification events from Subnet contract. const ( // subnet creation subnetCreateEvName = "Put" // subnet removal subnetRemoveEvName = "Delete" // subnet creation (notary) notarySubnetCreateEvName = "put" ) // makes IR server to listen notifications of Subnet contract. // All required resources must be initialized before (initSubnet). // Works in one of two modes (configured): notary and non-notary. // // All handlers are executed only if local node is an alphabet one. // // Events (notary): // * put (parser: subnetevents.ParseNotaryPut, handler: catchSubnetCreation); // // Events (non-notary): // * Put (parser: subnetevents.ParsePut, handler: catchSubnetCreation); // * Delete (parser: subnetevents.ParseDelete, handler: catchSubnetCreation). func (s *Server) listenSubnet() { if s.sideNotaryConfig.disabled { s.listenSubnetWithoutNotary() return } var ( parserInfo event.NotaryParserInfo handlerInfo event.NotaryHandlerInfo ) parserInfo.SetScriptHash(s.contracts.subnet) handlerInfo.SetScriptHash(s.contracts.subnet) listenEvent := func(notifyName string, parser event.NotaryParser, handler event.Handler) { notifyTyp := event.NotaryTypeFromString(notifyName) parserInfo.SetMempoolType(mempoolevent.TransactionAdded) handlerInfo.SetMempoolType(mempoolevent.TransactionAdded) parserInfo.SetParser(parser) handlerInfo.SetHandler(handler) parserInfo.SetRequestType(notifyTyp) handlerInfo.SetRequestType(notifyTyp) s.morphListener.SetNotaryParser(parserInfo) s.morphListener.RegisterNotaryHandler(handlerInfo) } // subnet creation listenEvent(notarySubnetCreateEvName, subnetevents.ParseNotaryPut, s.onlyAlphabetEventHandler(s.catchSubnetCreation)) } func (s *Server) listenSubnetWithoutNotary() { var ( parserInfo event.NotificationParserInfo handlerInfo event.NotificationHandlerInfo ) parserInfo.SetScriptHash(s.contracts.subnet) handlerInfo.SetScriptHash(s.contracts.subnet) listenEvent := func(notifyName string, parser event.NotificationParser, handler event.Handler) { notifyTyp := event.TypeFromString(notifyName) parserInfo.SetType(notifyTyp) handlerInfo.SetType(notifyTyp) parserInfo.SetParser(parser) handlerInfo.SetHandler(handler) s.morphListener.SetNotificationParser(parserInfo) s.morphListener.RegisterNotificationHandler(handlerInfo) } // subnet creation listenEvent(subnetCreateEvName, subnetevents.ParsePut, s.onlyAlphabetEventHandler(s.catchSubnetCreation)) // subnet removal listenEvent(subnetRemoveEvName, subnetevents.ParseDelete, s.onlyAlphabetEventHandler(s.catchSubnetRemoval)) } // catchSubnetCreation catches event of subnet creation from listener and queues the processing. func (s *Server) catchSubnetCreation(e event.Event) { err := s.subnetHandler.workerPool.Submit(func() { s.handleSubnetCreation(e) }) if err != nil { s.log.Error("subnet creation queue failure", zap.String("error", err.Error()), ) } } // implements irsubnet.Put event interface required by irsubnet.PutValidator. type putSubnetEvent struct { ev subnetevents.Put } // ReadID unmarshals subnet ID from a binary NeoFS API protocol's format. func (x putSubnetEvent) ReadID(id *subnetid.ID) error { return id.Unmarshal(x.ev.ID()) } var errMissingSubnetOwner = errors.New("missing subnet owner") // ReadCreator unmarshals subnet creator from a binary NeoFS API protocol's format. // Returns an error if byte array is empty. func (x putSubnetEvent) ReadCreator(id *owner.ID) error { data := x.ev.Owner() if len(data) == 0 { return errMissingSubnetOwner } key, err := keys.NewPublicKeyFromBytes(data, elliptic.P256()) if err != nil { return err } wal, err := owner.NEO3WalletFromPublicKey((*ecdsa.PublicKey)(key)) if err != nil { return err } // it would be better if we could do it not like this *id = *owner.NewIDFromNeo3Wallet(wal) return nil } // ReadInfo unmarshal subnet info from a binary NeoFS API protocol's format. func (x putSubnetEvent) ReadInfo(info *subnet.Info) error { return info.Unmarshal(x.ev.Info()) } // handleSubnetCreation handles event of subnet creation parsed via subnetevents.ParsePut. // // Validates the event using irsubnet.PutValidator. Logs message about (dis)agreement. func (s *Server) handleSubnetCreation(e event.Event) { putEv := e.(subnetevents.Put) // panic occurs only if we registered handler incorrectly err := s.subnetHandler.putValidator.Assert(putSubnetEvent{ ev: putEv, }) if err != nil { s.log.Info("discard subnet creation", zap.String("reason", err.Error()), ) return } notaryMainTx := putEv.NotaryMainTx() isNotary := notaryMainTx != nil if isNotary { // re-sign notary request err = s.morphClient.NotarySignAndInvokeTX(notaryMainTx) } else { // send new transaction var prm morphsubnet.PutPrm prm.SetID(putEv.ID()) prm.SetOwner(putEv.Owner()) prm.SetInfo(putEv.Info()) prm.SetTxHash(putEv.TxHash()) _, err = s.subnetHandler.morphClient.Put(prm) } if err != nil { s.log.Error("approve subnet creation", zap.Bool("notary", isNotary), zap.String("error", err.Error()), ) return } } // catchSubnetRemoval catches event of subnet removal from listener and queues the processing. func (s *Server) catchSubnetRemoval(e event.Event) { err := s.subnetHandler.workerPool.Submit(func() { s.handleSubnetCreation(e) }) if err != nil { s.log.Error("subnet removal queue failure", zap.String("error", err.Error()), ) } } // implements irsubnet.Delete event interface required by irsubnet.DeleteValidator. type deleteSubnetEvent struct { ev subnetevents.Delete } // ReadID unmarshals subnet ID from a binary NeoFS API protocol's format. func (x deleteSubnetEvent) ReadID(id *subnetid.ID) error { return id.Unmarshal(x.ev.ID()) } // handleSubnetRemoval handles event of subnet removal parsed via subnetevents.ParseDelete. func (s *Server) handleSubnetRemoval(e event.Event) { delEv := e.(subnetevents.Delete) // panic occurs only if we registered handler incorrectly err := s.subnetHandler.delValidator.Assert(deleteSubnetEvent{ ev: delEv, }) if err != nil { s.log.Info("discard subnet removal", zap.String("reason", err.Error()), ) return } // send new transaction var prm morphsubnet.DeletePrm prm.SetID(delEv.ID()) prm.SetTxHash(delEv.TxHash()) _, err = s.subnetHandler.morphClient.Delete(prm) if err != nil { s.log.Error("approve subnet removal", zap.String("error", err.Error()), ) return } // TODO: handle removal of the subnet in netmap candidates }