[#807] morph/event/container: Add delete notary support

Includes:
- `delete` container notary notification;
- refactor in processor bindings;
- fixed conflicts in `put` notifications.

Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>

pkg/innerring/processors/container/process_container.go

@@ -187,7 +187,15 @@ func (cp *Processor) checkDeleteContainer(e *containerEvent.Delete) error {
 }
 
 func (cp *Processor) approveDeleteContainer(e *containerEvent.Delete) {
-	err := cp.cnrClient.Delete(e.ContainerID(), e.Signature(), e.SessionToken())
+	var err error
+
+	if nr := e.NotaryRequest(); nr != nil {
+		// delete event was received via Notary service
+		err = cp.cnrClient.Morph().NotarySignAndInvokeTX(nr.MainTransaction)
+	} else {
+		// delete event was received via notification service
+		err = cp.cnrClient.Delete(e.ContainerID(), e.Signature(), e.SessionToken())
+	}
 	if err != nil {
 		cp.log.Error("could not approve delete container",
 			zap.String("error", err.Error()),

pkg/innerring/processors/container/processor.go

@@ -98,6 +98,10 @@ func New(p *Params) (*Processor, error) {
 
 // ListenerNotificationParsers for the 'event.Listener' event producer.
 func (cp *Processor) ListenerNotificationParsers() []event.NotificationParserInfo {
+	if !cp.notaryDisabled {
+		return nil
+	}
+
 	var (
 		parsers = make([]event.NotificationParserInfo, 0, 3)
 
@@ -106,12 +110,10 @@ func (cp *Processor) ListenerNotificationParsers() []event.NotificationParserInf
 
 	p.SetScriptHash(cp.containerContract)
 
-	if cp.notaryDisabled {
 	// container put
 	p.SetType(event.TypeFromString(putNotification))
 	p.SetParser(containerEvent.ParsePut)
 	parsers = append(parsers, p)
-	}
 
 	// container delete
 	p.SetType(event.TypeFromString(deleteNotification))
@@ -128,6 +130,10 @@ func (cp *Processor) ListenerNotificationParsers() []event.NotificationParserInf
 
 // ListenerNotificationHandlers for the 'event.Listener' event producer.
 func (cp *Processor) ListenerNotificationHandlers() []event.NotificationHandlerInfo {
+	if !cp.notaryDisabled {
+		return nil
+	}
+
 	var (
 		handlers = make([]event.NotificationHandlerInfo, 0, 3)
 
@@ -136,12 +142,10 @@ func (cp *Processor) ListenerNotificationHandlers() []event.NotificationHandlerI
 
 	h.SetScriptHash(cp.containerContract)
 
-	if cp.notaryDisabled {
 	// container put
 	h.SetType(event.TypeFromString(putNotification))
 	h.SetHandler(cp.handlePut)
 	handlers = append(handlers, h)
-	}
 
 	// container delete
 	h.SetType(event.TypeFromString(deleteNotification))
@@ -158,26 +162,50 @@ func (cp *Processor) ListenerNotificationHandlers() []event.NotificationHandlerI
 
 // ListenerNotaryParsers for the 'event.Listener' notary event producer.
 func (cp *Processor) ListenerNotaryParsers() []event.NotaryParserInfo {
-	var p event.NotaryParserInfo
+	var (
+		p event.NotaryParserInfo
+
+		pp = make([]event.NotaryParserInfo, 0, 3)
+	)
 
 	p.SetMempoolType(mempoolevent.TransactionAdded)
-	p.SetRequestType(containerEvent.PutNotaryEvent)
 	p.SetScriptHash(cp.containerContract)
-	p.SetParser(containerEvent.ParsePutNotary)
 
-	return []event.NotaryParserInfo{p}
+	// container put
+	p.SetRequestType(containerEvent.PutNotaryEvent)
+	p.SetParser(containerEvent.ParsePutNotary)
+	pp = append(pp, p)
+
+	// container delete
+	p.SetRequestType(containerEvent.DeleteNotaryEvent)
+	p.SetParser(containerEvent.ParseDeleteNotary)
+	pp = append(pp, p)
+
+	return pp
 }
 
 // ListenerNotaryHandlers for the 'event.Listener' notary event producer.
 func (cp *Processor) ListenerNotaryHandlers() []event.NotaryHandlerInfo {
-	var h event.NotaryHandlerInfo
+	var (
+		h event.NotaryHandlerInfo
+
+		hh = make([]event.NotaryHandlerInfo, 0, 3)
+	)
 
-	h.SetMempoolType(mempoolevent.TransactionAdded)
-	h.SetRequestType(containerEvent.PutNotaryEvent)
 	h.SetScriptHash(cp.containerContract)
-	h.SetHandler(cp.handlePut)
+	h.SetMempoolType(mempoolevent.TransactionAdded)
 
-	return []event.NotaryHandlerInfo{h}
+	// container put
+	h.SetRequestType(containerEvent.PutNotaryEvent)
+	h.SetHandler(cp.handlePut)
+	hh = append(hh, h)
+
+	// container delete
+	h.SetRequestType(containerEvent.DeleteNotaryEvent)
+	h.SetHandler(cp.handleDelete)
+	hh = append(hh, h)
+
+	return hh
 }
 
 // TimersHandlers for the 'Timers' event producer.

pkg/morph/event/container/delete.go

@@ -3,6 +3,7 @@ package container
 import (
 	"fmt"
 
+	"github.com/nspcc-dev/neo-go/pkg/network/payload"
 	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
 	"github.com/nspcc-dev/neofs-node/pkg/morph/client"
 	"github.com/nspcc-dev/neofs-node/pkg/morph/event"
@@ -13,6 +14,10 @@ type Delete struct {
 	containerID []byte
 	signature   []byte
 	token       []byte
+
+	// For notary notifications only.
+	// Contains raw transactions of notary request.
+	notaryRequest *payload.P2PNotaryRequest
 }
 
 // MorphEvent implements Neo:Morph Event interface.
@@ -30,6 +35,14 @@ func (d Delete) SessionToken() []byte {
 	return d.token
 }
 
+// NotaryRequest returns raw notary request if notification
+// was received via notary service. Otherwise, returns nil.
+func (d Delete) NotaryRequest() *payload.P2PNotaryRequest {
+	return d.notaryRequest
+}
+
+const expectedItemNumDelete = 3
+
 // ParseDelete from notification into container event structure.
 //
 // Expects 3 stack items.
@@ -39,10 +52,8 @@ func ParseDelete(params []stackitem.Item) (event.Event, error) {
 		err error
 	)
 
-	const expectedItemNumEACL = 3
+	if ln := len(params); ln != expectedItemNumDelete {
-
+		return nil, event.WrongNumberOfParameters(expectedItemNumDelete, ln)
-	if ln := len(params); ln != expectedItemNumEACL {
-		return nil, event.WrongNumberOfParameters(expectedItemNumEACL, ln)
 	}
 
 	// parse container

pkg/morph/event/container/delete_notary.go

@@ -0,0 +1,70 @@
+package container
+
+import (
+	"github.com/nspcc-dev/neo-go/pkg/vm/opcode"
+	"github.com/nspcc-dev/neofs-node/pkg/morph/event"
+)
+
+func (d *Delete) setContainerID(v []byte) {
+	if v != nil {
+		d.containerID = v
+	}
+}
+
+func (d *Delete) setSignature(v []byte) {
+	if v != nil {
+		d.signature = v
+	}
+}
+
+func (d *Delete) setToken(v []byte) {
+	if v != nil {
+		d.token = v
+	}
+}
+
+var deleteFieldSetters = []func(*Delete, []byte){
+	// order on stack is reversed
+	(*Delete).setToken,
+	(*Delete).setSignature,
+	(*Delete).setContainerID,
+}
+
+const (
+	// DeleteNotaryEvent is method name for container delete operations
+	// in `Container` contract. Is used as identificator for notary
+	// delete container requests.
+	DeleteNotaryEvent = "delete"
+)
+
+// ParseDeleteNotary from NotaryEvent into container event structure.
+func ParseDeleteNotary(ne event.NotaryEvent) (event.Event, error) {
+	var (
+		ev        Delete
+		currentOp opcode.Opcode
+	)
+
+	fieldNum := 0
+
+	for _, op := range ne.Params() {
+		currentOp = op.Code()
+
+		switch {
+		case opcode.PUSHDATA1 <= currentOp && currentOp <= opcode.PUSHDATA4:
+			if fieldNum == expectedItemNumDelete {
+				return nil, event.UnexpectedArgNumErr(DeleteNotaryEvent)
+			}
+
+			deleteFieldSetters[fieldNum](&ev, op.Param())
+			fieldNum++
+		case opcode.PUSH0 <= currentOp && currentOp <= opcode.PUSH16 || currentOp == opcode.PACK:
+			// array packing opcodes. do nothing with it
+		default:
+			return nil, event.UnexpectedOpcode(DeleteNotaryEvent, op.Code())
+		}
+	}
+
+	ev.notaryRequest = ne.Raw()
+
+	return ev, nil
+}

pkg/morph/event/container/put_notary.go

@@ -1,8 +1,6 @@
 package container
 
 import (
-	"fmt"
-
 	"github.com/nspcc-dev/neo-go/pkg/vm/opcode"
 	"github.com/nspcc-dev/neofs-node/pkg/morph/event"
 )
@@ -31,7 +29,7 @@ func (p *Put) setToken(v []byte) {
 	}
 }
 
-var fieldSetters = []func(*Put, []byte){
+var putFieldSetters = []func(*Put, []byte){
 	// order on stack is reversed
 	(*Put).setToken,
 	(*Put).setPublicKey,
@@ -46,8 +44,6 @@ const (
 	PutNotaryEvent = "put"
 )
 
-var errUnexpectedArgumentAmount = fmt.Errorf("unexpected arguments amount in %s call", PutNotaryEvent)
-
 // ParsePutNotary from NotaryEvent into container event structure.
 func ParsePutNotary(ne event.NotaryEvent) (event.Event, error) {
 	var (
@@ -63,10 +59,10 @@ func ParsePutNotary(ne event.NotaryEvent) (event.Event, error) {
 		switch {
 		case opcode.PUSHDATA1 <= currentOp && currentOp <= opcode.PUSHDATA4:
 			if fieldNum == expectedItemNumPut {
-				return nil, errUnexpectedArgumentAmount
+				return nil, event.UnexpectedArgNumErr(PutNotaryEvent)
 			}
 
-			fieldSetters[fieldNum](&ev, op.Param())
+			putFieldSetters[fieldNum](&ev, op.Param())
 			fieldNum++
 		case opcode.PUSH0 <= currentOp && currentOp <= opcode.PUSH16 || currentOp == opcode.PACK:
 			// array packing opcodes. do nothing with it

pkg/morph/event/notary.go

@@ -43,6 +43,12 @@ func NotaryTypeFromString(str string) NotaryType {
 	return NotaryType(str)
 }
 
+// UnexpectedArgNumErr returns error when notary parsers
+// get unexpected amount of argument in contract call.
+func UnexpectedArgNumErr(method string) error {
+	return fmt.Errorf("unexpected arguments amount in %s call", method)
+}
+
 // UnexpectedOpcode returns error when notary parsers
 // get unexpected opcode in contract call.
 func UnexpectedOpcode(method string, op opcode.Opcode) error {