[#7] Add container delete notification handler

Signed-off-by: Alex Vanin <alexey@nspcc.ru>

pkg/innerring/invoke/container.go

@@ -13,10 +13,17 @@ type (
 		Container []byte
 		Signature []byte
 	}
+
+	// ContainerParams for container put invocation.
+	RemoveContainerParams struct {
+		ContainerID []byte
+		Signature   []byte
+	}
 )
 
 const (
 	putContainerMethod    = "put"
+	deleteContainerMethod = "delete"
 )
 
 // RegisterContainer invokes Put method.
@@ -31,3 +38,15 @@ func RegisterContainer(cli *client.Client, con util.Uint160, p *ContainerParams)
 		p.Key.Bytes(),
 	)
 }
+
+// RegisterContainer invokes Delete method.
+func RemoveContainer(cli *client.Client, con util.Uint160, p *RemoveContainerParams) error {
+	if cli == nil {
+		return client.ErrNilClient
+	}
+
+	return cli.Invoke(con, extraFee, deleteContainerMethod,
+		p.ContainerID,
+		p.Signature,
+	)
+}

pkg/innerring/invoke/neofs.go

@@ -26,7 +26,7 @@ const (
 	// for invocation calculated based on testinvoke which happens at collection
 	// stage. Therefore client has to provide some extra SysFee to operate at
 	// execution stage. Otherwise invocation will fail due to gas limit.
-	extraFee = 5000_0000 // 0.5 Fixed8 gas
+	extraFee = 1_5000_0000 // 1.5 Fixed8 gas
 
 	checkIsInnerRingMethod = "isInnerRing"
 	chequeMethod           = "cheque"

pkg/innerring/processors/container/handlers.go

@@ -26,3 +26,19 @@ func (cp *Processor) handlePut(ev event.Event) {
 			zap.Int("capacity", cp.pool.Cap()))
 	}
 }
+
+func (cp *Processor) handleDelete(ev event.Event) {
+	del := ev.(containerEvent.Delete) // todo: check panic in production
+	cp.log.Info("notification",
+		zap.String("type", "container delete"),
+		zap.String("id", base58.Encode(del.ContainerID())))
+
+	// send event to the worker pool
+
+	err := cp.pool.Submit(func() { cp.processContainerDelete(&del) })
+	if err != nil {
+		// todo: move into controlled degradation stage
+		cp.log.Warn("container processor worker pool drained",
+			zap.Int("capacity", cp.pool.Cap()))
+	}
+}

pkg/innerring/processors/container/process_container.go

@@ -24,3 +24,21 @@ func (cp *Processor) processContainerPut(put *containerEvent.Put) {
 		cp.log.Error("can't invoke new container", zap.Error(err))
 	}
 }
+
+// Process delete container operation from the user by checking container sanity
+// and sending approve tx back to morph.
+func (cp *Processor) processContainerDelete(delete *containerEvent.Delete) {
+	if !cp.activeState.IsActive() {
+		cp.log.Info("passive mode, ignore container put")
+		return
+	}
+
+	err := invoke.RemoveContainer(cp.morphClient, cp.containerContract,
+		&invoke.RemoveContainerParams{
+			ContainerID: delete.ContainerID(),
+			Signature:   delete.Signature(),
+		})
+	if err != nil {
+		cp.log.Error("can't invoke delete container", zap.Error(err))
+	}
+}

pkg/innerring/processors/container/processor.go

@@ -37,6 +37,7 @@ type (
 
 const (
 	putNotification    = "containerPut"
+	deleteNotification = "containerDelete"
 )
 
 // New creates container contract processor instance.
@@ -71,11 +72,18 @@ func (cp *Processor) ListenerParsers() []event.ParserInfo {
 	var parsers []event.ParserInfo
 
 	// container put event
-	deposit := event.ParserInfo{}
-	deposit.SetType(putNotification)
-	deposit.SetScriptHash(cp.containerContract)
-	deposit.SetParser(containerEvent.ParsePut)
-	parsers = append(parsers, deposit)
+	put := event.ParserInfo{}
+	put.SetType(putNotification)
+	put.SetScriptHash(cp.containerContract)
+	put.SetParser(containerEvent.ParsePut)
+	parsers = append(parsers, put)
+
+	// container del event
+	del := event.ParserInfo{}
+	del.SetType(deleteNotification)
+	del.SetScriptHash(cp.containerContract)
+	del.SetParser(containerEvent.ParseDelete)
+	parsers = append(parsers, del)
 
 	return parsers
 }
@@ -85,11 +93,17 @@ func (cp *Processor) ListenerHandlers() []event.HandlerInfo {
 	var handlers []event.HandlerInfo
 
 	// container put handler
-	deposit := event.HandlerInfo{}
-	deposit.SetType(putNotification)
-	deposit.SetScriptHash(cp.containerContract)
-	deposit.SetHandler(cp.handlePut)
-	handlers = append(handlers, deposit)
+	put := event.HandlerInfo{}
+	put.SetType(putNotification)
+	put.SetScriptHash(cp.containerContract)
+	put.SetHandler(cp.handlePut)
+	handlers = append(handlers, put)
+
+	del := event.HandlerInfo{}
+	del.SetType(deleteNotification)
+	del.SetScriptHash(cp.containerContract)
+	del.SetHandler(cp.handleDelete)
+	handlers = append(handlers, del)
 
 	return handlers
 }