From 342eeb47a8b5a17271a6336f10123bd528a58df8 Mon Sep 17 00:00:00 2001
From: Leonard Lyubich <leonard@nspcc.ru>
Date: Thu, 22 Oct 2020 18:41:08 +0300
Subject: [PATCH] [#172] v2/object: Define well-known system attributes

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
---
 v2/object/attributes.go | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 v2/object/attributes.go

diff --git a/v2/object/attributes.go b/v2/object/attributes.go
new file mode 100644
index 00000000..0da07b80
--- /dev/null
+++ b/v2/object/attributes.go
@@ -0,0 +1,12 @@
+package object
+
+// SysAttrPrefix is a prefix of key to system attribute.
+const SysAttrPrefix = "__NEOFS__"
+
+const (
+	// SysAttrUploadID marks smaller parts of a split bigger object.
+	SysAttrUploadID = SysAttrPrefix + "UPLOAD_ID"
+
+	// SysAttrExpEpoch tells GC to delete object after that epoch.
+	SysAttrExpEpoch = SysAttrPrefix + "EXPIRATION_EPOCH"
+)