[#1632] node: Subscribe on the successful container creations/removals

There is a need to sync container-related caching mechanism with the
actual Sidechain changes. To do this, node should be able to listen
incoming notifications about container ops.

Define `PutSuccess` / `DeleteSuccess` notification event's parsers.
Subscribe to these events in node app. As initial implementation node
will log event receipts. Later handling is going to be practically
complicated.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

pkg/morph/event/container/delete_test.go

@@ -1,10 +1,12 @@
 package container
 
 import (
+	"crypto/sha256"
 	"testing"
 
 	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
 	"github.com/nspcc-dev/neofs-node/pkg/morph/event"
+	cidtest "github.com/nspcc-dev/neofs-sdk-go/container/id/test"
 	"github.com/stretchr/testify/require"
 )
 
@@ -67,3 +69,46 @@ func TestParseDelete(t *testing.T) {
 		}, ev)
 	})
 }
+
+func TestParseDeleteSuccess(t *testing.T) {
+	t.Run("wrong number of parameters", func(t *testing.T) {
+		prms := []stackitem.Item{
+			stackitem.NewMap(),
+			stackitem.NewMap(),
+		}
+
+		_, err := ParseDeleteSuccess(createNotifyEventFromItems(prms))
+		require.EqualError(t, err, event.WrongNumberOfParameters(1, len(prms)).Error())
+	})
+
+	t.Run("wrong container parameter", func(t *testing.T) {
+		_, err := ParseDeleteSuccess(createNotifyEventFromItems([]stackitem.Item{
+			stackitem.NewMap(),
+		}))
+
+		require.Error(t, err)
+
+		_, err = ParseDeleteSuccess(createNotifyEventFromItems([]stackitem.Item{
+			stackitem.NewByteArray([]byte{1, 2, 3}),
+		}))
+
+		require.Error(t, err)
+	})
+
+	t.Run("correct behavior", func(t *testing.T) {
+		id := cidtest.ID()
+
+		binID := make([]byte, sha256.Size)
+		id.Encode(binID)
+
+		ev, err := ParseDeleteSuccess(createNotifyEventFromItems([]stackitem.Item{
+			stackitem.NewByteArray(binID),
+		}))
+
+		require.NoError(t, err)
+
+		require.Equal(t, DeleteSuccess{
+			ID: id,
+		}, ev)
+	})
+}