[#7] Add container delete event

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

pkg/morph/event/container/delete.go

@@ -0,0 +1,49 @@
+package container
+
+import (
+	"github.com/nspcc-dev/neo-go/pkg/smartcontract"
+	"github.com/nspcc-dev/neofs-node/pkg/morph/client"
+	"github.com/nspcc-dev/neofs-node/pkg/morph/event"
+	"github.com/pkg/errors"
+)
+
+// Delete structure of container.Delete notification from morph chain.
+type Delete struct {
+	containerID []byte
+	signature   []byte
+}
+
+// MorphEvent implements Neo:Morph Event interface.
+func (Delete) MorphEvent() {}
+
+// Container is a marshalled container structure, defined in API.
+func (d Delete) ContainerID() []byte { return d.containerID }
+
+// Signature of marshalled container by container owner.
+func (d Delete) Signature() []byte { return d.signature }
+
+// ParseDelete from notification into container event structure.
+func ParseDelete(params []smartcontract.Parameter) (event.Event, error) {
+	var (
+		ev  Delete
+		err error
+	)
+
+	if ln := len(params); ln != 2 {
+		return nil, event.WrongNumberOfParameters(2, ln)
+	}
+
+	// parse container
+	ev.containerID, err = client.BytesFromStackParameter(params[0])
+	if err != nil {
+		return nil, errors.Wrap(err, "could not get container")
+	}
+
+	// parse signature
+	ev.signature, err = client.BytesFromStackParameter(params[1])
+	if err != nil {
+		return nil, errors.Wrap(err, "could not get signature")
+	}
+
+	return ev, nil
+}