[#155] sdk/object: Define object types

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

pkg/object/type.go

@@ -0,0 +1,35 @@
+package object
+
+import (
+	"github.com/nspcc-dev/neofs-api-go/v2/object"
+)
+
+type Type uint8
+
+const (
+	TypeRegular Type = iota
+	TypeTombstone
+	TypeStorageGroup
+)
+
+func (t Type) ToV2() object.Type {
+	switch t {
+	case TypeTombstone:
+		return object.TypeTombstone
+	case TypeStorageGroup:
+		return object.TypeStorageGroup
+	default:
+		return object.TypeRegular
+	}
+}
+
+func TypeFromV2(t object.Type) Type {
+	switch t {
+	case object.TypeTombstone:
+		return TypeTombstone
+	case object.TypeStorageGroup:
+		return TypeStorageGroup
+	default:
+		return TypeRegular
+	}
+}