From 1ff8b3fd947fc98d14d2295c61bbc4906f0b3fe3 Mon Sep 17 00:00:00 2001
From: Leonard Lyubich <leonard@nspcc.ru>
Date: Mon, 16 Nov 2020 17:54:43 +0300
Subject: [PATCH] [#199] sdk/object: Correct linter's remarks

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
---
 pkg/object/fmt.go    | 8 ++++++--
 pkg/object/search.go | 2 ++
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/pkg/object/fmt.go b/pkg/object/fmt.go
index 0432195..0ada68b 100644
--- a/pkg/object/fmt.go
+++ b/pkg/object/fmt.go
@@ -10,6 +10,10 @@ import (
 	"github.com/pkg/errors"
 )
 
+var errCheckSumMismatch = errors.New("payload checksum mismatch")
+
+var errIncorrectID = errors.New("incorrect object identifier")
+
 // CalculatePayloadChecksum calculates and returns checksum of
 // object payload bytes.
 func CalculatePayloadChecksum(payload []byte) *pkg.Checksum {
@@ -34,7 +38,7 @@ func VerifyPayloadChecksum(obj *Object) error {
 		obj.PayloadChecksum(),
 		CalculatePayloadChecksum(obj.Payload()),
 	) {
-		return errors.New("payload checksum mismatch")
+		return errCheckSumMismatch
 	}
 
 	return nil
@@ -75,7 +79,7 @@ func VerifyID(obj *Object) error {
 	}
 
 	if !id.Equal(obj.ID()) {
-		return errors.New("incorrect object identifier")
+		return errIncorrectID
 	}
 
 	return nil
diff --git a/pkg/object/search.go b/pkg/object/search.go
index d2cb849..b9383e2 100644
--- a/pkg/object/search.go
+++ b/pkg/object/search.go
@@ -138,6 +138,7 @@ func NewSearchFilters() SearchFilters {
 
 func NewSearchFiltersFromV2(v2 []*v2object.SearchFilter) SearchFilters {
 	filters := make(SearchFilters, 0, len(v2))
+
 	for i := range v2 {
 		if v2[i] == nil {
 			continue
@@ -197,6 +198,7 @@ func (f *SearchFilters) AddObjectOwnerIDFilter(m SearchMatchType, id *owner.ID)
 
 func (f SearchFilters) ToV2() []*v2object.SearchFilter {
 	result := make([]*v2object.SearchFilter, 0, len(f))
+
 	for i := range f {
 		v2 := new(v2object.SearchFilter)
 		v2.SetKey(f[i].header.String())