From 3c0ef270f47aac36a0f57ad80e8b2ab9d57c4925 Mon Sep 17 00:00:00 2001
From: Leonard Lyubich <leonard@nspcc.ru>
Date: Wed, 25 Nov 2020 12:40:41 +0300
Subject: [PATCH] [#211] blobstor: Define Exists operation

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
---
 pkg/local_object_storage/blobstor/exists.go | 24 +++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 pkg/local_object_storage/blobstor/exists.go

diff --git a/pkg/local_object_storage/blobstor/exists.go b/pkg/local_object_storage/blobstor/exists.go
new file mode 100644
index 00000000..b790ac92
--- /dev/null
+++ b/pkg/local_object_storage/blobstor/exists.go
@@ -0,0 +1,24 @@
+package blobstor
+
+// ExistsPrm groups the parameters of Exists operation.
+type ExistsPrm struct {
+	address
+}
+
+// ExistsRes groups resulting values of Exists operation.
+type ExistsRes struct {
+	exists bool
+}
+
+// Exists returns the fact that the object is in BLOB storage.
+func (r ExistsRes) Exists() bool {
+	return r.exists
+}
+
+// Exists checks if object is presented in BLOB storage.
+//
+// Returns any error encountered that did not allow
+// to completely check object existence.
+func (b *BlobStor) Exists(prm *ExistsPrm) (*ExistsRes, error) {
+	panic("implement me")
+}