From 84d981e88e53ee40381ca4d3a05bec59a5af88b5 Mon Sep 17 00:00:00 2001
From: Evgenii Stratonikov <evgeniy@nspcc.ru>
Date: Sat, 12 Mar 2022 15:20:19 +0300
Subject: [PATCH] util/proto: do not return error from primitive marshalers

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
---
 accounting/marshal.go      |  18 +---
 acl/marshal.go             |  93 +++--------------
 audit/marshal.go           |  75 ++------------
 container/marshal.go       |  45 ++------
 netmap/marshal.go          | 190 ++++++----------------------------
 object/marshal.go          | 204 ++++++-------------------------------
 refs/marshal.go            |  77 +++-----------
 reputation/marshal.go      |  36 ++-----
 session/marshal.go         | 160 +++++------------------------
 status/marshal.go          |  26 +----
 storagegroup/marshal.go    |  14 +--
 tombstone/marshal.go       |  15 +--
 util/proto/marshal.go      |  80 +++++++--------
 util/proto/marshal_test.go | 101 ++++--------------
 14 files changed, 202 insertions(+), 932 deletions(-)

diff --git a/accounting/marshal.go b/accounting/marshal.go
index 8c2e06f..0d908c0 100644
--- a/accounting/marshal.go
+++ b/accounting/marshal.go
@@ -24,22 +24,10 @@ func (d *Decimal) StableMarshal(buf []byte) ([]byte, error) {
 		buf = make([]byte, d.StableSize())
 	}
 
-	var (
-		offset, n int
-		err       error
-	)
+	var offset int
 
-	n, err = protoutil.Int64Marshal(decimalValueField, buf[offset:], d.val)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	_, err = protoutil.UInt32Marshal(decimalPrecisionField, buf[offset:], d.prec)
-	if err != nil {
-		return nil, err
-	}
+	offset += protoutil.Int64Marshal(decimalValueField, buf[offset:], d.val)
+	protoutil.UInt32Marshal(decimalPrecisionField, buf[offset:], d.prec)
 
 	return buf, nil
 }
diff --git a/acl/marshal.go b/acl/marshal.go
index 5ef3676..11c6174 100644
--- a/acl/marshal.go
+++ b/acl/marshal.go
@@ -114,19 +114,8 @@ func (r *Record) StableMarshal(buf []byte) ([]byte, error) {
 		err       error
 	)
 
-	n, err = protoutil.EnumMarshal(recordOperationField, buf[offset:], int32(r.op))
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = protoutil.EnumMarshal(recordActionField, buf[offset:], int32(r.action))
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
+	offset += protoutil.EnumMarshal(recordOperationField, buf[offset:], int32(r.op))
+	offset += protoutil.EnumMarshal(recordActionField, buf[offset:], int32(r.action))
 
 	for i := range r.filters {
 		n, err = protoutil.NestedStructureMarshal(recordFiltersField, buf[offset:], &r.filters[i])
@@ -184,36 +173,12 @@ func (f *HeaderFilter) StableMarshal(buf []byte) ([]byte, error) {
 		buf = make([]byte, f.StableSize())
 	}
 
-	var (
-		offset, n int
-		err       error
-	)
+	var offset int
 
-	n, err = protoutil.EnumMarshal(filterHeaderTypeField, buf[offset:], int32(f.hdrType))
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = protoutil.EnumMarshal(filterMatchTypeField, buf[offset:], int32(f.matchType))
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = protoutil.StringMarshal(filterNameField, buf[offset:], f.key)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	_, err = protoutil.StringMarshal(filterValueField, buf[offset:], f.value)
-	if err != nil {
-		return nil, err
-	}
+	offset += protoutil.EnumMarshal(filterHeaderTypeField, buf[offset:], int32(f.hdrType))
+	offset += protoutil.EnumMarshal(filterMatchTypeField, buf[offset:], int32(f.matchType))
+	offset += protoutil.StringMarshal(filterNameField, buf[offset:], f.key)
+	protoutil.StringMarshal(filterValueField, buf[offset:], f.value)
 
 	return buf, nil
 }
@@ -247,22 +212,10 @@ func (t *Target) StableMarshal(buf []byte) ([]byte, error) {
 		buf = make([]byte, t.StableSize())
 	}
 
-	var (
-		offset, n int
-		err       error
-	)
+	var offset int
 
-	n, err = protoutil.EnumMarshal(targetTypeField, buf[offset:], int32(t.role))
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	_, err = protoutil.RepeatedBytesMarshal(targetKeysField, buf[offset:], t.keys)
-	if err != nil {
-		return nil, err
-	}
+	offset += protoutil.EnumMarshal(targetTypeField, buf[offset:], int32(t.role))
+	protoutil.RepeatedBytesMarshal(targetKeysField, buf[offset:], t.keys)
 
 	return buf, nil
 }
@@ -292,29 +245,11 @@ func (l *TokenLifetime) StableMarshal(buf []byte) ([]byte, error) {
 		buf = make([]byte, l.StableSize())
 	}
 
-	var (
-		offset, n int
-		err       error
-	)
+	var offset int
 
-	n, err = protoutil.UInt64Marshal(lifetimeExpirationField, buf[offset:], l.exp)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = protoutil.UInt64Marshal(lifetimeNotValidBeforeField, buf[offset:], l.nbf)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	_, err = protoutil.UInt64Marshal(lifetimeIssuedAtField, buf[offset:], l.iat)
-	if err != nil {
-		return nil, err
-	}
+	offset += protoutil.UInt64Marshal(lifetimeExpirationField, buf[offset:], l.exp)
+	offset += protoutil.UInt64Marshal(lifetimeNotValidBeforeField, buf[offset:], l.nbf)
+	protoutil.UInt64Marshal(lifetimeIssuedAtField, buf[offset:], l.iat)
 
 	return buf, nil
 }
diff --git a/audit/marshal.go b/audit/marshal.go
index dc46a21..02633a4 100644
--- a/audit/marshal.go
+++ b/audit/marshal.go
@@ -48,12 +48,7 @@ func (a *DataAuditResult) StableMarshal(buf []byte) ([]byte, error) {
 
 	offset += n
 
-	n, err = proto.Fixed64Marshal(auditEpochFNum, buf[offset:], a.auditEpoch)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
+	offset += proto.Fixed64Marshal(auditEpochFNum, buf[offset:], a.auditEpoch)
 
 	n, err = proto.NestedStructureMarshal(cidFNum, buf[offset:], a.cid)
 	if err != nil {
@@ -62,33 +57,10 @@ func (a *DataAuditResult) StableMarshal(buf []byte) ([]byte, error) {
 
 	offset += n
 
-	n, err = proto.BytesMarshal(pubKeyFNum, buf[offset:], a.pubKey)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = proto.BoolMarshal(completeFNum, buf[offset:], a.complete)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = proto.UInt32Marshal(requestsFNum, buf[offset:], a.requests)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = proto.UInt32Marshal(retriesFNum, buf[offset:], a.retries)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
+	offset += proto.BytesMarshal(pubKeyFNum, buf[offset:], a.pubKey)
+	offset += proto.BoolMarshal(completeFNum, buf[offset:], a.complete)
+	offset += proto.UInt32Marshal(requestsFNum, buf[offset:], a.requests)
+	offset += proto.UInt32Marshal(retriesFNum, buf[offset:], a.retries)
 
 	n, err = refs.ObjectIDNestedListMarshal(passSGFNum, buf[offset:], a.passSG)
 	if err != nil {
@@ -104,38 +76,11 @@ func (a *DataAuditResult) StableMarshal(buf []byte) ([]byte, error) {
 
 	offset += n
 
-	n, err = proto.UInt32Marshal(hitFNum, buf[offset:], a.hit)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = proto.UInt32Marshal(missFNum, buf[offset:], a.miss)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = proto.UInt32Marshal(failFNum, buf[offset:], a.fail)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = proto.RepeatedBytesMarshal(passNodesFNum, buf[offset:], a.passNodes)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	_, err = proto.RepeatedBytesMarshal(failNodesFNum, buf[offset:], a.failNodes)
-	if err != nil {
-		return nil, err
-	}
+	offset += proto.UInt32Marshal(hitFNum, buf[offset:], a.hit)
+	offset += proto.UInt32Marshal(missFNum, buf[offset:], a.miss)
+	offset += proto.UInt32Marshal(failFNum, buf[offset:], a.fail)
+	offset += proto.RepeatedBytesMarshal(passNodesFNum, buf[offset:], a.passNodes)
+	proto.RepeatedBytesMarshal(failNodesFNum, buf[offset:], a.failNodes)
 
 	return buf, nil
 }
diff --git a/container/marshal.go b/container/marshal.go
index f5f7c11..f8a940d 100644
--- a/container/marshal.go
+++ b/container/marshal.go
@@ -60,22 +60,10 @@ func (a *Attribute) StableMarshal(buf []byte) ([]byte, error) {
 		buf = make([]byte, a.StableSize())
 	}
 
-	var (
-		offset, n int
-		err       error
-	)
+	var offset int
 
-	n, err = protoutil.StringMarshal(attributeKeyField, buf[offset:], a.key)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	_, err = protoutil.StringMarshal(attributeValueField, buf[offset:], a.val)
-	if err != nil {
-		return nil, err
-	}
+	offset += protoutil.StringMarshal(attributeKeyField, buf[offset:], a.key)
+	protoutil.StringMarshal(attributeValueField, buf[offset:], a.val)
 
 	return buf, nil
 }
@@ -123,19 +111,8 @@ func (c *Container) StableMarshal(buf []byte) ([]byte, error) {
 
 	offset += n
 
-	n, err = protoutil.BytesMarshal(containerNonceField, buf[offset:], c.nonce)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = protoutil.UInt32Marshal(containerBasicACLField, buf[offset:], c.basicACL)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
+	offset += protoutil.BytesMarshal(containerNonceField, buf[offset:], c.nonce)
+	offset += protoutil.UInt32Marshal(containerBasicACLField, buf[offset:], c.basicACL)
 
 	for i := range c.attr {
 		n, err = protoutil.NestedStructureMarshal(containerAttributesField, buf[offset:], &c.attr[i])
@@ -612,12 +589,7 @@ func (a *UsedSpaceAnnouncement) StableMarshal(buf []byte) ([]byte, error) {
 		err       error
 	)
 
-	n, err = protoutil.UInt64Marshal(usedSpaceAnnounceEpochField, buf[offset:], a.epoch)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
+	offset += protoutil.UInt64Marshal(usedSpaceAnnounceEpochField, buf[offset:], a.epoch)
 
 	n, err = protoutil.NestedStructureMarshal(usedSpaceAnnounceCIDField, buf[offset:], a.cid)
 	if err != nil {
@@ -626,10 +598,7 @@ func (a *UsedSpaceAnnouncement) StableMarshal(buf []byte) ([]byte, error) {
 
 	offset += n
 
-	_, err = protoutil.UInt64Marshal(usedSpaceAnnounceUsedSpaceField, buf[offset:], a.usedSpace)
-	if err != nil {
-		return nil, err
-	}
+	protoutil.UInt64Marshal(usedSpaceAnnounceUsedSpaceField, buf[offset:], a.usedSpace)
 
 	return buf, nil
 }
diff --git a/netmap/marshal.go b/netmap/marshal.go
index 70a8b4c..72a974e 100644
--- a/netmap/marshal.go
+++ b/netmap/marshal.go
@@ -55,33 +55,10 @@ func (f *Filter) StableMarshal(buf []byte) ([]byte, error) {
 		err       error
 	)
 
-	n, err = protoutil.StringMarshal(nameFilterField, buf[offset:], f.name)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = protoutil.StringMarshal(keyFilterField, buf[offset:], f.key)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = protoutil.EnumMarshal(opFilterField, buf[offset:], int32(f.op))
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = protoutil.StringMarshal(valueFilterField, buf[offset:], f.value)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
+	offset += protoutil.StringMarshal(nameFilterField, buf[offset:], f.name)
+	offset += protoutil.StringMarshal(keyFilterField, buf[offset:], f.key)
+	offset += protoutil.EnumMarshal(opFilterField, buf[offset:], int32(f.op))
+	offset += protoutil.StringMarshal(valueFilterField, buf[offset:], f.value)
 
 	for i := range f.filters {
 		n, err = protoutil.NestedStructureMarshal(filtersFilterField, buf[offset:], &f.filters[i])
@@ -120,43 +97,13 @@ func (s *Selector) StableMarshal(buf []byte) ([]byte, error) {
 		buf = make([]byte, s.StableSize())
 	}
 
-	var (
-		offset, n int
-		err       error
-	)
+	var offset int
 
-	n, err = protoutil.StringMarshal(nameSelectorField, buf[offset:], s.name)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = protoutil.UInt32Marshal(countSelectorField, buf[offset:], s.count)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = protoutil.EnumMarshal(clauseSelectorField, buf[offset:], int32(s.clause))
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = protoutil.StringMarshal(attributeSelectorField, buf[offset:], s.attribute)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	_, err = protoutil.StringMarshal(filterSelectorField, buf[offset:], s.filter)
-	if err != nil {
-		return nil, err
-	}
+	offset += protoutil.StringMarshal(nameSelectorField, buf[offset:], s.name)
+	offset += protoutil.UInt32Marshal(countSelectorField, buf[offset:], s.count)
+	offset += protoutil.EnumMarshal(clauseSelectorField, buf[offset:], int32(s.clause))
+	offset += protoutil.StringMarshal(attributeSelectorField, buf[offset:], s.attribute)
+	protoutil.StringMarshal(filterSelectorField, buf[offset:], s.filter)
 
 	return buf, nil
 }
@@ -184,22 +131,10 @@ func (r *Replica) StableMarshal(buf []byte) ([]byte, error) {
 		buf = make([]byte, r.StableSize())
 	}
 
-	var (
-		offset, n int
-		err       error
-	)
+	var offset int
 
-	n, err = protoutil.UInt32Marshal(countReplicaField, buf[offset:], r.count)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	_, err = protoutil.StringMarshal(selectorReplicaField, buf[offset:], r.selector)
-	if err != nil {
-		return nil, err
-	}
+	offset += protoutil.UInt32Marshal(countReplicaField, buf[offset:], r.count)
+	protoutil.StringMarshal(selectorReplicaField, buf[offset:], r.selector)
 
 	return buf, nil
 }
@@ -238,12 +173,7 @@ func (p *PlacementPolicy) StableMarshal(buf []byte) ([]byte, error) {
 		offset += n
 	}
 
-	n, err = protoutil.UInt32Marshal(backupPolicyField, buf[offset:], p.backupFactor)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
+	offset += protoutil.UInt32Marshal(backupPolicyField, buf[offset:], p.backupFactor)
 
 	for i := range p.selectors {
 		n, err = protoutil.NestedStructureMarshal(selectorsPolicyField, buf[offset:], &p.selectors[i])
@@ -304,32 +234,13 @@ func (a *Attribute) StableMarshal(buf []byte) ([]byte, error) {
 		buf = make([]byte, a.StableSize())
 	}
 
-	var (
-		offset, n int
-		err       error
-	)
+	var offset int
 
-	n, err = protoutil.StringMarshal(keyAttributeField, buf[offset:], a.key)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = protoutil.StringMarshal(valueAttributeField, buf[offset:], a.value)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
+	offset += protoutil.StringMarshal(keyAttributeField, buf[offset:], a.key)
+	offset += protoutil.StringMarshal(valueAttributeField, buf[offset:], a.value)
 
 	for i := range a.parents {
-		n, err = protoutil.StringMarshal(parentsAttributeField, buf[offset:], a.parents[i])
-		if err != nil {
-			return nil, err
-		}
-
-		offset += n
+		offset += protoutil.StringMarshal(parentsAttributeField, buf[offset:], a.parents[i])
 	}
 
 	return buf, nil
@@ -368,19 +279,8 @@ func (ni *NodeInfo) StableMarshal(buf []byte) ([]byte, error) {
 		err       error
 	)
 
-	n, err = protoutil.BytesMarshal(keyNodeInfoField, buf[offset:], ni.publicKey)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = protoutil.RepeatedStringMarshal(addressNodeInfoField, buf[offset:], ni.addresses)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
+	offset += protoutil.BytesMarshal(keyNodeInfoField, buf[offset:], ni.publicKey)
+	offset += protoutil.RepeatedStringMarshal(addressNodeInfoField, buf[offset:], ni.addresses)
 
 	for i := range ni.attributes {
 		n, err = protoutil.NestedStructureMarshal(attributesNodeInfoField, buf[offset:], &ni.attributes[i])
@@ -391,10 +291,7 @@ func (ni *NodeInfo) StableMarshal(buf []byte) ([]byte, error) {
 		offset += n
 	}
 
-	_, err = protoutil.EnumMarshal(stateNodeInfoField, buf[offset:], int32(ni.state))
-	if err != nil {
-		return nil, err
-	}
+	protoutil.EnumMarshal(stateNodeInfoField, buf[offset:], int32(ni.state))
 
 	return buf, nil
 }
@@ -491,22 +388,10 @@ func (x *NetworkParameter) StableMarshal(buf []byte) ([]byte, error) {
 		buf = make([]byte, x.StableSize())
 	}
 
-	var (
-		offset, n int
-		err       error
-	)
+	var offset int
 
-	n, err = protoutil.BytesMarshal(netPrmKeyFNum, buf[offset:], x.k)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	_, err = protoutil.BytesMarshal(netPrmValFNum, buf[offset:], x.v)
-	if err != nil {
-		return nil, err
-	}
+	offset += protoutil.BytesMarshal(netPrmKeyFNum, buf[offset:], x.k)
+	protoutil.BytesMarshal(netPrmValFNum, buf[offset:], x.v)
 
 	return buf, nil
 }
@@ -583,30 +468,13 @@ func (i *NetworkInfo) StableMarshal(buf []byte) ([]byte, error) {
 	}
 
 	var (
-		offset, n int
-		err       error
+		offset int
+		err    error
 	)
 
-	n, err = protoutil.UInt64Marshal(netInfoCurEpochFNum, buf[offset:], i.curEpoch)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = protoutil.UInt64Marshal(netInfoMagicNumFNum, buf[offset:], i.magicNum)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = protoutil.Int64Marshal(netInfoMSPerBlockFNum, buf[offset:], i.msPerBlock)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
+	offset += protoutil.UInt64Marshal(netInfoCurEpochFNum, buf[offset:], i.curEpoch)
+	offset += protoutil.UInt64Marshal(netInfoMagicNumFNum, buf[offset:], i.magicNum)
+	offset += protoutil.Int64Marshal(netInfoMSPerBlockFNum, buf[offset:], i.msPerBlock)
 
 	_, err = protoutil.NestedStructureMarshal(netInfoCfgFNum, buf[offset:], i.netCfg)
 	if err != nil {
diff --git a/object/marshal.go b/object/marshal.go
index a3e69b3..79b767d 100644
--- a/object/marshal.go
+++ b/object/marshal.go
@@ -133,12 +133,7 @@ func (h *ShortHeader) StableMarshal(buf []byte) ([]byte, error) {
 
 	offset += n
 
-	n, err = proto.UInt64Marshal(shortHdrEpochField, buf[offset:], h.creatEpoch)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
+	offset += proto.UInt64Marshal(shortHdrEpochField, buf[offset:], h.creatEpoch)
 
 	n, err = proto.NestedStructureMarshal(shortHdrOwnerField, buf[offset:], h.ownerID)
 	if err != nil {
@@ -147,19 +142,8 @@ func (h *ShortHeader) StableMarshal(buf []byte) ([]byte, error) {
 
 	offset += n
 
-	n, err = proto.EnumMarshal(shortHdrObjectTypeField, buf[offset:], int32(h.typ))
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = proto.UInt64Marshal(shortHdrPayloadLength, buf[offset:], h.payloadLen)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
+	offset += proto.EnumMarshal(shortHdrObjectTypeField, buf[offset:], int32(h.typ))
+	offset += proto.UInt64Marshal(shortHdrPayloadLength, buf[offset:], h.payloadLen)
 
 	n, err = proto.NestedStructureMarshal(shortHdrHashField, buf[offset:], h.payloadHash)
 	if err != nil {
@@ -205,22 +189,10 @@ func (a *Attribute) StableMarshal(buf []byte) ([]byte, error) {
 		buf = make([]byte, a.StableSize())
 	}
 
-	var (
-		offset, n int
-		err       error
-	)
+	var offset int
 
-	n, err = proto.StringMarshal(attributeKeyField, buf[offset:], a.key)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	_, err = proto.StringMarshal(attributeValueField, buf[offset:], a.val)
-	if err != nil {
-		return nil, err
-	}
+	offset += proto.StringMarshal(attributeKeyField, buf[offset:], a.key)
+	proto.StringMarshal(attributeValueField, buf[offset:], a.val)
 
 	return buf, nil
 }
@@ -289,10 +261,7 @@ func (h *SplitHeader) StableMarshal(buf []byte) ([]byte, error) {
 
 	offset += n
 
-	_, err = proto.BytesMarshal(splitHdrSplitIDField, buf[offset:], h.splitID)
-	if err != nil {
-		return nil, err
-	}
+	proto.BytesMarshal(splitHdrSplitIDField, buf[offset:], h.splitID)
 
 	return buf, nil
 }
@@ -351,19 +320,8 @@ func (h *Header) StableMarshal(buf []byte) ([]byte, error) {
 
 	offset += n
 
-	n, err = proto.UInt64Marshal(hdrEpochField, buf[offset:], h.creatEpoch)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = proto.UInt64Marshal(hdrPayloadLengthField, buf[offset:], h.payloadLen)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
+	offset += proto.UInt64Marshal(hdrEpochField, buf[offset:], h.creatEpoch)
+	offset += proto.UInt64Marshal(hdrPayloadLengthField, buf[offset:], h.payloadLen)
 
 	n, err = proto.NestedStructureMarshal(hdrPayloadHashField, buf[offset:], h.payloadHash)
 	if err != nil {
@@ -372,12 +330,7 @@ func (h *Header) StableMarshal(buf []byte) ([]byte, error) {
 
 	offset += n
 
-	n, err = proto.EnumMarshal(hdrObjectTypeField, buf[offset:], int32(h.typ))
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
+	offset += proto.EnumMarshal(hdrObjectTypeField, buf[offset:], int32(h.typ))
 
 	n, err = proto.NestedStructureMarshal(hdrHomomorphicHashField, buf[offset:], h.homoHash)
 	if err != nil {
@@ -515,10 +468,7 @@ func (o *Object) StableMarshal(buf []byte) ([]byte, error) {
 
 	offset += n
 
-	_, err = proto.BytesMarshal(objPayloadField, buf[offset:], o.payload)
-	if err != nil {
-		return nil, err
-	}
+	proto.BytesMarshal(objPayloadField, buf[offset:], o.payload)
 
 	return buf, nil
 }
@@ -554,12 +504,7 @@ func (s *SplitInfo) StableMarshal(buf []byte) ([]byte, error) {
 		err       error
 	)
 
-	n, err = proto.BytesMarshal(splitInfoSplitIDField, buf[offset:], s.splitID)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
+	offset += proto.BytesMarshal(splitInfoSplitIDField, buf[offset:], s.splitID)
 
 	n, err = proto.NestedStructureMarshal(splitInfoLastPartField, buf[offset:], s.lastPart)
 	if err != nil {
@@ -613,10 +558,7 @@ func (r *GetRequestBody) StableMarshal(buf []byte) ([]byte, error) {
 
 	offset += n
 
-	_, err = proto.BoolMarshal(getReqBodyRawFlagField, buf[offset:], r.raw)
-	if err != nil {
-		return nil, err
-	}
+	proto.BoolMarshal(getReqBodyRawFlagField, buf[offset:], r.raw)
 
 	return buf, nil
 }
@@ -706,10 +648,7 @@ func (r *GetResponseBody) StableMarshal(buf []byte) ([]byte, error) {
 		}
 	case *GetObjectPartChunk:
 		if v != nil {
-			_, err := proto.BytesMarshal(getRespBodyChunkField, buf, v.chunk)
-			if err != nil {
-				return nil, err
-			}
+			proto.BytesMarshal(getRespBodyChunkField, buf, v.chunk)
 		}
 	case *SplitInfo:
 		_, err := proto.NestedStructureMarshal(getRespBodySplitInfoField, buf, v)
@@ -784,10 +723,7 @@ func (r *PutObjectPartInit) StableMarshal(buf []byte) ([]byte, error) {
 
 	offset += n
 
-	_, err = proto.UInt32Marshal(putReqInitCopiesNumField, buf[offset:], r.copyNum)
-	if err != nil {
-		return nil, err
-	}
+	proto.UInt32Marshal(putReqInitCopiesNumField, buf[offset:], r.copyNum)
 
 	return buf, nil
 }
@@ -827,10 +763,7 @@ func (r *PutRequestBody) StableMarshal(buf []byte) ([]byte, error) {
 		}
 	case *PutObjectPartChunk:
 		if v != nil {
-			_, err := proto.BytesMarshal(putReqBodyChunkField, buf, v.chunk)
-			if err != nil {
-				return nil, err
-			}
+			proto.BytesMarshal(putReqBodyChunkField, buf, v.chunk)
 		}
 	default:
 		panic("unknown one of object put request body type")
@@ -977,17 +910,8 @@ func (r *HeadRequestBody) StableMarshal(buf []byte) ([]byte, error) {
 
 	offset += n
 
-	n, err = proto.BoolMarshal(headReqBodyMainFlagField, buf[offset:], r.mainOnly)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	_, err = proto.BoolMarshal(headReqBodyRawFlagField, buf[offset:], r.raw)
-	if err != nil {
-		return nil, err
-	}
+	offset += proto.BoolMarshal(headReqBodyMainFlagField, buf[offset:], r.mainOnly)
+	proto.BoolMarshal(headReqBodyRawFlagField, buf[offset:], r.raw)
 
 	return buf, nil
 }
@@ -1086,29 +1010,11 @@ func (f *SearchFilter) StableMarshal(buf []byte) ([]byte, error) {
 		buf = make([]byte, f.StableSize())
 	}
 
-	var (
-		offset, n int
-		err       error
-	)
+	var offset int
 
-	n, err = proto.EnumMarshal(searchFilterMatchField, buf[offset:], int32(f.matchType))
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = proto.StringMarshal(searchFilterNameField, buf[offset:], f.key)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	_, err = proto.StringMarshal(searchFilterValueField, buf[offset:], f.val)
-	if err != nil {
-		return nil, err
-	}
+	offset += proto.EnumMarshal(searchFilterMatchField, buf[offset:], int32(f.matchType))
+	offset += proto.StringMarshal(searchFilterNameField, buf[offset:], f.key)
+	proto.StringMarshal(searchFilterValueField, buf[offset:], f.val)
 
 	return buf, nil
 }
@@ -1150,12 +1056,7 @@ func (r *SearchRequestBody) StableMarshal(buf []byte) ([]byte, error) {
 
 	offset += n
 
-	n, err = proto.UInt32Marshal(searchReqBodyVersionField, buf[offset:], r.version)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
+	offset += proto.UInt32Marshal(searchReqBodyVersionField, buf[offset:], r.version)
 
 	for i := range r.filters {
 		n, err = proto.NestedStructureMarshal(searchReqBodyFiltersField, buf[offset:], &r.filters[i])
@@ -1233,22 +1134,10 @@ func (r *Range) StableMarshal(buf []byte) ([]byte, error) {
 		buf = make([]byte, r.StableSize())
 	}
 
-	var (
-		offset, n int
-		err       error
-	)
+	var offset int
 
-	n, err = proto.UInt64Marshal(rangeOffsetField, buf[offset:], r.off)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	_, err = proto.UInt64Marshal(rangeLengthField, buf[offset:], r.len)
-	if err != nil {
-		return nil, err
-	}
+	offset += proto.UInt64Marshal(rangeOffsetField, buf[offset:], r.off)
+	proto.UInt64Marshal(rangeLengthField, buf[offset:], r.len)
 
 	return buf, nil
 }
@@ -1296,10 +1185,7 @@ func (r *GetRangeRequestBody) StableMarshal(buf []byte) ([]byte, error) {
 
 	offset += n
 
-	_, err = proto.BoolMarshal(getRangeReqBodyRawField, buf[offset:], r.raw)
-	if err != nil {
-		return nil, err
-	}
+	proto.BoolMarshal(getRangeReqBodyRawField, buf[offset:], r.raw)
 
 	return buf, nil
 }
@@ -1333,10 +1219,7 @@ func (r *GetRangeResponseBody) StableMarshal(buf []byte) ([]byte, error) {
 	case nil:
 	case *GetRangePartChunk:
 		if v != nil {
-			_, err := proto.BytesMarshal(getRangeRespChunkField, buf, v.chunk)
-			if err != nil {
-				return nil, err
-			}
+			proto.BytesMarshal(getRangeRespChunkField, buf, v.chunk)
 		}
 	case *SplitInfo:
 		if v != nil {
@@ -1408,17 +1291,8 @@ func (r *GetRangeHashRequestBody) StableMarshal(buf []byte) ([]byte, error) {
 		offset += n
 	}
 
-	n, err = proto.BytesMarshal(getRangeHashReqBodySaltField, buf[offset:], r.salt)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	_, err = proto.EnumMarshal(getRangeHashReqBodyTypeField, buf[offset:], int32(r.typ))
-	if err != nil {
-		return nil, err
-	}
+	offset += proto.BytesMarshal(getRangeHashReqBodySaltField, buf[offset:], r.salt)
+	proto.EnumMarshal(getRangeHashReqBodyTypeField, buf[offset:], int32(r.typ))
 
 	return buf, nil
 }
@@ -1453,22 +1327,10 @@ func (r *GetRangeHashResponseBody) StableMarshal(buf []byte) ([]byte, error) {
 		buf = make([]byte, r.StableSize())
 	}
 
-	var (
-		offset, n int
-		err       error
-	)
+	var offset int
 
-	n, err = proto.EnumMarshal(getRangeHashRespBodyTypeField, buf, int32(r.typ))
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	_, err = proto.RepeatedBytesMarshal(getRangeHashRespBodyHashListField, buf[offset:], r.hashList)
-	if err != nil {
-		return nil, err
-	}
+	offset += proto.EnumMarshal(getRangeHashRespBodyTypeField, buf, int32(r.typ))
+	proto.RepeatedBytesMarshal(getRangeHashRespBodyHashListField, buf[offset:], r.hashList)
 
 	return buf, nil
 }
diff --git a/refs/marshal.go b/refs/marshal.go
index aa04b63..ffb1ba5 100644
--- a/refs/marshal.go
+++ b/refs/marshal.go
@@ -36,10 +36,7 @@ func (o *OwnerID) StableMarshal(buf []byte) ([]byte, error) {
 		buf = make([]byte, o.StableSize())
 	}
 
-	_, err := proto.BytesMarshal(ownerIDValField, buf, o.val)
-	if err != nil {
-		return nil, err
-	}
+	proto.BytesMarshal(ownerIDValField, buf, o.val)
 
 	return buf, nil
 }
@@ -65,10 +62,7 @@ func (c *ContainerID) StableMarshal(buf []byte) ([]byte, error) {
 		buf = make([]byte, c.StableSize())
 	}
 
-	_, err := proto.BytesMarshal(containerIDValField, buf, c.val)
-	if err != nil {
-		return nil, err
-	}
+	proto.BytesMarshal(containerIDValField, buf, c.val)
 
 	return buf, nil
 }
@@ -94,10 +88,7 @@ func (o *ObjectID) StableMarshal(buf []byte) ([]byte, error) {
 		buf = make([]byte, o.StableSize())
 	}
 
-	_, err := proto.BytesMarshal(objectIDValField, buf, o.val)
-	if err != nil {
-		return nil, err
-	}
+	proto.BytesMarshal(objectIDValField, buf, o.val)
 
 	return buf, nil
 }
@@ -195,22 +186,10 @@ func (c *Checksum) StableMarshal(buf []byte) ([]byte, error) {
 		buf = make([]byte, c.StableSize())
 	}
 
-	var (
-		offset, n int
-		err       error
-	)
+	var offset int
 
-	n, err = proto.EnumMarshal(checksumTypeField, buf[offset:], int32(c.typ))
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	_, err = proto.BytesMarshal(checksumValueField, buf[offset:], c.sum)
-	if err != nil {
-		return nil, err
-	}
+	offset += proto.EnumMarshal(checksumTypeField, buf[offset:], int32(c.typ))
+	proto.BytesMarshal(checksumValueField, buf[offset:], c.sum)
 
 	return buf, nil
 }
@@ -239,29 +218,11 @@ func (s *Signature) StableMarshal(buf []byte) ([]byte, error) {
 		buf = make([]byte, s.StableSize())
 	}
 
-	var (
-		offset, n int
-		err       error
-	)
+	var offset int
 
-	n, err = proto.BytesMarshal(signatureKeyField, buf[offset:], s.key)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = proto.BytesMarshal(signatureValueField, buf[offset:], s.sign)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	_, err = proto.EnumMarshal(signatureSchemeField, buf[offset:], int32(s.scheme))
-	if err != nil {
-		return nil, err
-	}
+	offset += proto.BytesMarshal(signatureKeyField, buf[offset:], s.key)
+	offset += proto.BytesMarshal(signatureValueField, buf[offset:], s.sign)
+	proto.EnumMarshal(signatureSchemeField, buf[offset:], int32(s.scheme))
 
 	return buf, nil
 }
@@ -291,22 +252,10 @@ func (v *Version) StableMarshal(buf []byte) ([]byte, error) {
 		buf = make([]byte, v.StableSize())
 	}
 
-	var (
-		offset, n int
-		err       error
-	)
+	var offset int
 
-	n, err = proto.UInt32Marshal(versionMajorField, buf[offset:], v.major)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	_, err = proto.UInt32Marshal(versionMinorField, buf[offset:], v.minor)
-	if err != nil {
-		return nil, err
-	}
+	offset += proto.UInt32Marshal(versionMajorField, buf[offset:], v.major)
+	proto.UInt32Marshal(versionMinorField, buf[offset:], v.minor)
 
 	return buf, nil
 }
diff --git a/reputation/marshal.go b/reputation/marshal.go
index 20d1fd7..789cb14 100644
--- a/reputation/marshal.go
+++ b/reputation/marshal.go
@@ -20,10 +20,7 @@ func (x *PeerID) StableMarshal(buf []byte) ([]byte, error) {
 		buf = make([]byte, x.StableSize())
 	}
 
-	_, err := protoutil.BytesMarshal(peerIDPubKeyFNum, buf, x.publicKey)
-	if err != nil {
-		return nil, err
-	}
+	protoutil.BytesMarshal(peerIDPubKeyFNum, buf, x.publicKey)
 
 	return buf, nil
 }
@@ -65,10 +62,7 @@ func (x *Trust) StableMarshal(buf []byte) ([]byte, error) {
 
 	offset += n
 
-	_, err = protoutil.Float64Marshal(trustValueFNum, buf[offset:], x.val)
-	if err != nil {
-		return nil, err
-	}
+	protoutil.Float64Marshal(trustValueFNum, buf[offset:], x.val)
 
 	return buf, nil
 }
@@ -230,12 +224,7 @@ func (x *AnnounceLocalTrustRequestBody) StableMarshal(buf []byte) ([]byte, error
 		err       error
 	)
 
-	n, err = protoutil.UInt64Marshal(announceLocalTrustBodyEpochFNum, buf[offset:], x.epoch)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
+	offset += protoutil.UInt64Marshal(announceLocalTrustBodyEpochFNum, buf[offset:], x.epoch)
 
 	for i := range x.trusts {
 		n, err = protoutil.NestedStructureMarshal(announceLocalTrustBodyTrustsFNum, buf[offset:], &x.trusts[i])
@@ -292,23 +281,12 @@ func (x *AnnounceIntermediateResultRequestBody) StableMarshal(buf []byte) ([]byt
 	}
 
 	var (
-		offset, n int
-		err       error
+		offset int
+		err    error
 	)
 
-	n, err = protoutil.UInt64Marshal(announceInterResBodyEpochFNum, buf, x.epoch)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = protoutil.UInt32Marshal(announceInterResBodyIterFNum, buf[offset:], x.iter)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
+	offset += protoutil.UInt64Marshal(announceInterResBodyEpochFNum, buf, x.epoch)
+	offset += protoutil.UInt32Marshal(announceInterResBodyIterFNum, buf[offset:], x.iter)
 
 	_, err = protoutil.NestedStructureMarshal(announceInterResBodyTrustFNum, buf[offset:], x.trust)
 	if err != nil {
diff --git a/session/marshal.go b/session/marshal.go
index a57d1a5..062076d 100644
--- a/session/marshal.go
+++ b/session/marshal.go
@@ -82,10 +82,7 @@ func (c *CreateRequestBody) StableMarshal(buf []byte) ([]byte, error) {
 
 	offset += n
 
-	_, err = proto.UInt64Marshal(createReqBodyExpirationField, buf[offset:], c.expiration)
-	if err != nil {
-		return nil, err
-	}
+	proto.UInt64Marshal(createReqBodyExpirationField, buf[offset:], c.expiration)
 
 	return buf, nil
 }
@@ -114,22 +111,10 @@ func (c *CreateResponseBody) StableMarshal(buf []byte) ([]byte, error) {
 		buf = make([]byte, c.StableSize())
 	}
 
-	var (
-		offset, n int
-		err       error
-	)
+	var offset int
 
-	n, err = proto.BytesMarshal(createRespBodyIDField, buf[offset:], c.id)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	_, err = proto.BytesMarshal(createRespBodyKeyField, buf[offset:], c.sessionKey)
-	if err != nil {
-		return nil, err
-	}
+	offset += proto.BytesMarshal(createRespBodyIDField, buf[offset:], c.id)
+	proto.BytesMarshal(createRespBodyKeyField, buf[offset:], c.sessionKey)
 
 	return buf, nil
 }
@@ -158,22 +143,10 @@ func (x *XHeader) StableMarshal(buf []byte) ([]byte, error) {
 		buf = make([]byte, x.StableSize())
 	}
 
-	var (
-		offset, n int
-		err       error
-	)
+	var offset int
 
-	n, err = proto.StringMarshal(xheaderKeyField, buf[offset:], x.key)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	_, err = proto.StringMarshal(xheaderValueField, buf[offset:], x.val)
-	if err != nil {
-		return nil, err
-	}
+	offset += proto.StringMarshal(xheaderKeyField, buf[offset:], x.key)
+	proto.StringMarshal(xheaderValueField, buf[offset:], x.val)
 
 	return buf, nil
 }
@@ -207,29 +180,11 @@ func (l *TokenLifetime) StableMarshal(buf []byte) ([]byte, error) {
 		buf = make([]byte, l.StableSize())
 	}
 
-	var (
-		offset, n int
-		err       error
-	)
+	var offset int
 
-	n, err = proto.UInt64Marshal(lifetimeExpirationField, buf[offset:], l.exp)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = proto.UInt64Marshal(lifetimeNotValidBeforeField, buf[offset:], l.nbf)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	_, err = proto.UInt64Marshal(lifetimeIssuedAtField, buf[offset:], l.iat)
-	if err != nil {
-		return nil, err
-	}
+	offset += proto.UInt64Marshal(lifetimeExpirationField, buf[offset:], l.exp)
+	offset += proto.UInt64Marshal(lifetimeNotValidBeforeField, buf[offset:], l.nbf)
+	proto.UInt64Marshal(lifetimeIssuedAtField, buf[offset:], l.iat)
 
 	return buf, nil
 }
@@ -264,22 +219,10 @@ func (c *ObjectSessionContext) StableMarshal(buf []byte) ([]byte, error) {
 		buf = make([]byte, c.StableSize())
 	}
 
-	var (
-		offset, n int
-		err       error
-	)
+	var offset int
 
-	n, err = proto.EnumMarshal(objectCtxVerbField, buf[offset:], int32(c.verb))
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	_, err = proto.NestedStructureMarshal(objectCtxAddressField, buf[offset:], c.addr)
-	if err != nil {
-		return nil, err
-	}
+	offset += proto.EnumMarshal(objectCtxVerbField, buf[offset:], int32(c.verb))
+	proto.NestedStructureMarshal(objectCtxAddressField, buf[offset:], c.addr)
 
 	return buf, nil
 }
@@ -320,29 +263,11 @@ func (x *ContainerSessionContext) StableMarshal(buf []byte) ([]byte, error) {
 		buf = make([]byte, x.StableSize())
 	}
 
-	var (
-		offset, n int
-		err       error
-	)
+	var offset int
 
-	n, err = proto.EnumMarshal(cnrCtxVerbFNum, buf[offset:], int32(ContainerSessionVerbToGRPCField(x.verb)))
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = proto.BoolMarshal(cnrCtxWildcardFNum, buf[offset:], x.wildcard)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	_, err = proto.NestedStructureMarshal(cnrCtxCidFNum, buf[offset:], x.cid)
-	if err != nil {
-		return nil, err
-	}
+	offset += proto.EnumMarshal(cnrCtxVerbFNum, buf[offset:], int32(ContainerSessionVerbToGRPCField(x.verb)))
+	offset += proto.BoolMarshal(cnrCtxWildcardFNum, buf[offset:], x.wildcard)
+	proto.NestedStructureMarshal(cnrCtxCidFNum, buf[offset:], x.cid)
 
 	return buf, nil
 }
@@ -377,12 +302,7 @@ func (t *TokenBody) StableMarshal(buf []byte) ([]byte, error) {
 		err       error
 	)
 
-	n, err = proto.BytesMarshal(sessionTokenBodyIDField, buf[offset:], t.id)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
+	offset += proto.BytesMarshal(sessionTokenBodyIDField, buf[offset:], t.id)
 
 	n, err = proto.NestedStructureMarshal(sessionTokenBodyOwnerField, buf[offset:], t.ownerID)
 	if err != nil {
@@ -398,12 +318,7 @@ func (t *TokenBody) StableMarshal(buf []byte) ([]byte, error) {
 
 	offset += n
 
-	n, err = proto.BytesMarshal(sessionTokenBodyKeyField, buf[offset:], t.sessionKey)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
+	offset += proto.BytesMarshal(sessionTokenBodyKeyField, buf[offset:], t.sessionKey)
 
 	if t.ctx != nil {
 		switch v := t.ctx.(type) {
@@ -528,19 +443,8 @@ func (r *RequestMetaHeader) StableMarshal(buf []byte) ([]byte, error) {
 
 	offset += n
 
-	n, err = proto.UInt64Marshal(reqMetaHeaderEpochField, buf[offset:], r.epoch)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = proto.UInt32Marshal(reqMetaHeaderTTLField, buf[offset:], r.ttl)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
+	offset += proto.UInt64Marshal(reqMetaHeaderEpochField, buf[offset:], r.epoch)
+	offset += proto.UInt32Marshal(reqMetaHeaderTTLField, buf[offset:], r.ttl)
 
 	for i := range r.xHeaders {
 		n, err = proto.NestedStructureMarshal(reqMetaHeaderXHeadersField, buf[offset:], &r.xHeaders[i])
@@ -572,10 +476,7 @@ func (r *RequestMetaHeader) StableMarshal(buf []byte) ([]byte, error) {
 
 	offset += n
 
-	_, err = proto.UInt64Marshal(reqMetaHeaderNetMagicField, buf[offset:], r.netMagic)
-	if err != nil {
-		return nil, err
-	}
+	proto.UInt64Marshal(reqMetaHeaderNetMagicField, buf[offset:], r.netMagic)
 
 	return buf, nil
 }
@@ -699,19 +600,8 @@ func (r *ResponseMetaHeader) StableMarshal(buf []byte) ([]byte, error) {
 
 	offset += n
 
-	n, err = proto.UInt64Marshal(respMetaHeaderEpochField, buf[offset:], r.epoch)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = proto.UInt32Marshal(respMetaHeaderTTLField, buf[offset:], r.ttl)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
+	offset += proto.UInt64Marshal(respMetaHeaderEpochField, buf[offset:], r.epoch)
+	offset += proto.UInt32Marshal(respMetaHeaderTTLField, buf[offset:], r.ttl)
 
 	for i := range r.xHeaders {
 		n, err = proto.NestedStructureMarshal(respMetaHeaderXHeadersField, buf[offset:], &r.xHeaders[i])
diff --git a/status/marshal.go b/status/marshal.go
index 5e04f24..1500198 100644
--- a/status/marshal.go
+++ b/status/marshal.go
@@ -21,22 +21,10 @@ func (x *Detail) StableMarshal(buf []byte) ([]byte, error) {
 		buf = make([]byte, x.StableSize())
 	}
 
-	var (
-		offset, n int
-		err       error
-	)
+	var offset int
 
-	n, err = protoutil.UInt32Marshal(detailIDFNum, buf[offset:], x.id)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	_, err = protoutil.BytesMarshal(detailValueFNum, buf[offset:], x.val)
-	if err != nil {
-		return nil, err
-	}
+	offset += protoutil.UInt32Marshal(detailIDFNum, buf[offset:], x.id)
+	offset += protoutil.BytesMarshal(detailValueFNum, buf[offset:], x.val)
 
 	return buf, nil
 }
@@ -73,20 +61,16 @@ func (x *Status) StableMarshal(buf []byte) ([]byte, error) {
 		err       error
 	)
 
-	n, err = protoutil.UInt32Marshal(statusCodeFNum, buf[offset:], CodeToGRPC(x.code))
+	offset += protoutil.UInt32Marshal(statusCodeFNum, buf[offset:], CodeToGRPC(x.code))
 	if err != nil {
 		return nil, err
 	}
 
-	offset += n
-
-	n, err = protoutil.StringMarshal(statusMsgFNum, buf[offset:], x.msg)
+	offset += protoutil.StringMarshal(statusMsgFNum, buf[offset:], x.msg)
 	if err != nil {
 		return nil, err
 	}
 
-	offset += n
-
 	for i := range x.details {
 		n, err = protoutil.NestedStructureMarshal(statusDetailsFNum, buf[offset:], &x.details[i])
 		if err != nil {
diff --git a/storagegroup/marshal.go b/storagegroup/marshal.go
index 534f6f7..d5e60c1 100644
--- a/storagegroup/marshal.go
+++ b/storagegroup/marshal.go
@@ -30,12 +30,7 @@ func (s *StorageGroup) StableMarshal(buf []byte) ([]byte, error) {
 		err       error
 	)
 
-	n, err = proto.UInt64Marshal(sizeField, buf[offset:], s.size)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
+	offset += proto.UInt64Marshal(sizeField, buf[offset:], s.size)
 
 	n, err = proto.NestedStructureMarshal(hashField, buf[offset:], s.hash)
 	if err != nil {
@@ -44,12 +39,7 @@ func (s *StorageGroup) StableMarshal(buf []byte) ([]byte, error) {
 
 	offset += n
 
-	n, err = proto.UInt64Marshal(expirationField, buf[offset:], s.exp)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
+	offset += proto.UInt64Marshal(expirationField, buf[offset:], s.exp)
 
 	_, err = refs.ObjectIDNestedListMarshal(objectIDsField, buf[offset:], s.members)
 	if err != nil {
diff --git a/tombstone/marshal.go b/tombstone/marshal.go
index cd778b9..f2f896a 100644
--- a/tombstone/marshal.go
+++ b/tombstone/marshal.go
@@ -28,19 +28,8 @@ func (s *Tombstone) StableMarshal(buf []byte) ([]byte, error) {
 		err       error
 	)
 
-	n, err = proto.UInt64Marshal(expFNum, buf[offset:], s.exp)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
-
-	n, err = proto.BytesMarshal(splitIDFNum, buf[offset:], s.splitID)
-	if err != nil {
-		return nil, err
-	}
-
-	offset += n
+	offset += proto.UInt64Marshal(expFNum, buf[offset:], s.exp)
+	offset += proto.BytesMarshal(splitIDFNum, buf[offset:], s.splitID)
 
 	for i := range s.members {
 		n, err = proto.NestedStructureMarshal(membersFNum, buf[offset:], &s.members[i])
diff --git a/util/proto/marshal.go b/util/proto/marshal.go
index 21e8013..a1bb1e9 100644
--- a/util/proto/marshal.go
+++ b/util/proto/marshal.go
@@ -20,9 +20,9 @@ type (
 	}
 )
 
-func BytesMarshal(field int, buf, v []byte) (int, error) {
+func BytesMarshal(field int, buf, v []byte) int {
 	if len(v) == 0 {
-		return 0, nil
+		return 0
 	}
 
 	prefix := field<<3 | 0x2
@@ -33,7 +33,7 @@ func BytesMarshal(field int, buf, v []byte) (int, error) {
 	i += binary.PutUvarint(buf[i:], uint64(len(v)))
 	i += copy(buf[i:], v)
 
-	return i, nil
+	return i
 }
 
 func BytesSize(field int, v []byte) int {
@@ -47,7 +47,7 @@ func BytesSize(field int, v []byte) int {
 	return VarUIntSize(uint64(prefix)) + VarUIntSize(uint64(ln)) + ln
 }
 
-func StringMarshal(field int, buf []byte, v string) (int, error) {
+func StringMarshal(field int, buf []byte, v string) int {
 	return BytesMarshal(field, buf, []byte(v))
 }
 
@@ -55,9 +55,9 @@ func StringSize(field int, v string) int {
 	return BytesSize(field, []byte(v))
 }
 
-func BoolMarshal(field int, buf []byte, v bool) (int, error) {
+func BoolMarshal(field int, buf []byte, v bool) int {
 	if !v {
-		return 0, nil
+		return 0
 	}
 
 	prefix := field << 3
@@ -67,7 +67,7 @@ func BoolMarshal(field int, buf []byte, v bool) (int, error) {
 	i := binary.PutUvarint(buf, uint64(prefix))
 	buf[i] = 0x1
 
-	return i + 1, nil
+	return i + 1
 }
 
 func BoolSize(field int, v bool) int {
@@ -80,9 +80,9 @@ func BoolSize(field int, v bool) int {
 	return VarUIntSize(uint64(prefix)) + 1 // bool is always 1 byte long
 }
 
-func UInt64Marshal(field int, buf []byte, v uint64) (int, error) {
+func UInt64Marshal(field int, buf []byte, v uint64) int {
 	if v == 0 {
-		return 0, nil
+		return 0
 	}
 
 	prefix := field << 3
@@ -92,7 +92,7 @@ func UInt64Marshal(field int, buf []byte, v uint64) (int, error) {
 	i := binary.PutUvarint(buf, uint64(prefix))
 	i += binary.PutUvarint(buf[i:], v)
 
-	return i, nil
+	return i
 }
 
 func UInt64Size(field int, v uint64) int {
@@ -105,7 +105,7 @@ func UInt64Size(field int, v uint64) int {
 	return VarUIntSize(uint64(prefix)) + VarUIntSize(v)
 }
 
-func Int64Marshal(field int, buf []byte, v int64) (int, error) {
+func Int64Marshal(field int, buf []byte, v int64) int {
 	return UInt64Marshal(field, buf, uint64(v))
 }
 
@@ -113,7 +113,7 @@ func Int64Size(field int, v int64) int {
 	return UInt64Size(field, uint64(v))
 }
 
-func UInt32Marshal(field int, buf []byte, v uint32) (int, error) {
+func UInt32Marshal(field int, buf []byte, v uint32) int {
 	return UInt64Marshal(field, buf, uint64(v))
 }
 
@@ -121,7 +121,7 @@ func UInt32Size(field int, v uint32) int {
 	return UInt64Size(field, uint64(v))
 }
 
-func Int32Marshal(field int, buf []byte, v int32) (int, error) {
+func Int32Marshal(field int, buf []byte, v int32) int {
 	return UInt64Marshal(field, buf, uint64(v))
 }
 
@@ -129,7 +129,7 @@ func Int32Size(field int, v int32) int {
 	return UInt64Size(field, uint64(v))
 }
 
-func EnumMarshal(field int, buf []byte, v int32) (int, error) {
+func EnumMarshal(field int, buf []byte, v int32) int {
 	return UInt64Marshal(field, buf, uint64(v))
 }
 
@@ -137,19 +137,14 @@ func EnumSize(field int, v int32) int {
 	return UInt64Size(field, uint64(v))
 }
 
-func RepeatedBytesMarshal(field int, buf []byte, v [][]byte) (int, error) {
+func RepeatedBytesMarshal(field int, buf []byte, v [][]byte) int {
 	var offset int
 
 	for i := range v {
-		off, err := BytesMarshal(field, buf[offset:], v[i])
-		if err != nil {
-			return 0, err
-		}
-
-		offset += off
+		offset += BytesMarshal(field, buf[offset:], v[i])
 	}
 
-	return offset, nil
+	return offset
 }
 
 func RepeatedBytesSize(field int, v [][]byte) (size int) {
@@ -160,19 +155,14 @@ func RepeatedBytesSize(field int, v [][]byte) (size int) {
 	return size
 }
 
-func RepeatedStringMarshal(field int, buf []byte, v []string) (int, error) {
+func RepeatedStringMarshal(field int, buf []byte, v []string) int {
 	var offset int
 
 	for i := range v {
-		off, err := StringMarshal(field, buf[offset:], v[i])
-		if err != nil {
-			return 0, err
-		}
-
-		offset += off
+		offset += StringMarshal(field, buf[offset:], v[i])
 	}
 
-	return offset, nil
+	return offset
 }
 
 func RepeatedStringSize(field int, v []string) (size int) {
@@ -183,9 +173,9 @@ func RepeatedStringSize(field int, v []string) (size int) {
 	return size
 }
 
-func RepeatedUInt64Marshal(field int, buf []byte, v []uint64) (int, error) {
+func RepeatedUInt64Marshal(field int, buf []byte, v []uint64) int {
 	if len(v) == 0 {
-		return 0, nil
+		return 0
 	}
 
 	prefix := field<<3 | 0x02
@@ -197,7 +187,7 @@ func RepeatedUInt64Marshal(field int, buf []byte, v []uint64) (int, error) {
 		offset += binary.PutUvarint(buf[offset:], v[i])
 	}
 
-	return offset, nil
+	return offset
 }
 
 func RepeatedUInt64Size(field int, v []uint64) (size, arraySize int) {
@@ -218,9 +208,9 @@ func RepeatedUInt64Size(field int, v []uint64) (size, arraySize int) {
 	return size, arraySize
 }
 
-func RepeatedInt64Marshal(field int, buf []byte, v []int64) (int, error) {
+func RepeatedInt64Marshal(field int, buf []byte, v []int64) int {
 	if len(v) == 0 {
-		return 0, nil
+		return 0
 	}
 
 	convert := make([]uint64, len(v))
@@ -244,9 +234,9 @@ func RepeatedInt64Size(field int, v []int64) (size, arraySize int) {
 	return RepeatedUInt64Size(field, convert)
 }
 
-func RepeatedUInt32Marshal(field int, buf []byte, v []uint32) (int, error) {
+func RepeatedUInt32Marshal(field int, buf []byte, v []uint32) int {
 	if len(v) == 0 {
-		return 0, nil
+		return 0
 	}
 
 	convert := make([]uint64, len(v))
@@ -270,9 +260,9 @@ func RepeatedUInt32Size(field int, v []uint32) (size, arraySize int) {
 	return RepeatedUInt64Size(field, convert)
 }
 
-func RepeatedInt32Marshal(field int, buf []byte, v []int32) (int, error) {
+func RepeatedInt32Marshal(field int, buf []byte, v []int32) int {
 	if len(v) == 0 {
-		return 0, nil
+		return 0
 	}
 
 	convert := make([]uint64, len(v))
@@ -337,9 +327,9 @@ func NestedStructureSize(field int64, v stableMarshaller) (size int) {
 	return size
 }
 
-func Fixed64Marshal(field int, buf []byte, v uint64) (int, error) {
+func Fixed64Marshal(field int, buf []byte, v uint64) int {
 	if v == 0 {
-		return 0, nil
+		return 0
 	}
 
 	prefix := field<<3 | 1
@@ -349,7 +339,7 @@ func Fixed64Marshal(field int, buf []byte, v uint64) (int, error) {
 	i := binary.PutUvarint(buf, uint64(prefix))
 	binary.LittleEndian.PutUint64(buf[i:], v)
 
-	return i + 8, nil
+	return i + 8
 }
 
 func Fixed64Size(fNum int, v uint64) int {
@@ -362,9 +352,9 @@ func Fixed64Size(fNum int, v uint64) int {
 	return VarUIntSize(uint64(prefix)) + 8
 }
 
-func Float64Marshal(field int, buf []byte, v float64) (int, error) {
+func Float64Marshal(field int, buf []byte, v float64) int {
 	if v == 0 {
-		return 0, nil
+		return 0
 	}
 
 	prefix := field<<3 | 1
@@ -372,7 +362,7 @@ func Float64Marshal(field int, buf []byte, v float64) (int, error) {
 	i := binary.PutUvarint(buf, uint64(prefix))
 	binary.LittleEndian.PutUint64(buf[i:], math.Float64bits(v))
 
-	return i + 8, nil
+	return i + 8
 }
 
 func Float64Size(fNum int, v float64) int {
diff --git a/util/proto/marshal_test.go b/util/proto/marshal_test.go
index a3f6882..e19f4ee 100644
--- a/util/proto/marshal_test.go
+++ b/util/proto/marshal_test.go
@@ -1,7 +1,6 @@
 package proto_test
 
 import (
-	"fmt"
 	"math"
 	"testing"
 
@@ -59,91 +58,55 @@ func (s *stablePrimitives) stableMarshal(buf []byte, wrongField bool) ([]byte, e
 	if wrongField {
 		fieldNum++
 	}
-	offset, err := proto.BytesMarshal(fieldNum, buf, s.FieldA)
-	if err != nil {
-		return nil, fmt.Errorf("can't marshal field a: %w", err)
-	}
-	i += offset
+	i += proto.BytesMarshal(fieldNum, buf, s.FieldA)
 
 	fieldNum = 2
 	if wrongField {
 		fieldNum++
 	}
-	offset, err = proto.StringMarshal(fieldNum, buf, s.FieldB)
-	if err != nil {
-		return nil, fmt.Errorf("can't marshal field b: %w", err)
-	}
-	i += offset
+	i += proto.StringMarshal(fieldNum, buf, s.FieldB)
 
 	fieldNum = 200
 	if wrongField {
 		fieldNum++
 	}
-	offset, err = proto.BoolMarshal(fieldNum, buf, s.FieldC)
-	if err != nil {
-		return nil, fmt.Errorf("can't marshal field c: %w", err)
-	}
-	i += offset
+	i += proto.BoolMarshal(fieldNum, buf, s.FieldC)
 
 	fieldNum = 201
 	if wrongField {
 		fieldNum++
 	}
-	offset, err = proto.Int32Marshal(fieldNum, buf, s.FieldD)
-	if err != nil {
-		return nil, fmt.Errorf("can't marshal field d: %w", err)
-	}
-	i += offset
+	i += proto.Int32Marshal(fieldNum, buf, s.FieldD)
 
 	fieldNum = 202
 	if wrongField {
 		fieldNum++
 	}
-	offset, err = proto.UInt32Marshal(fieldNum, buf, s.FieldE)
-	if err != nil {
-		return nil, fmt.Errorf("can't marshal field e: %w", err)
-	}
-	i += offset
+	i += proto.UInt32Marshal(fieldNum, buf, s.FieldE)
 
 	fieldNum = 203
 	if wrongField {
 		fieldNum++
 	}
-	offset, err = proto.Int64Marshal(fieldNum, buf, s.FieldF)
-	if err != nil {
-		return nil, fmt.Errorf("can't marshal field f: %w", err)
-	}
-	i += offset
+	i += proto.Int64Marshal(fieldNum, buf, s.FieldF)
 
 	fieldNum = 204
 	if wrongField {
 		fieldNum++
 	}
-	offset, err = proto.UInt64Marshal(fieldNum, buf, s.FieldG)
-	if err != nil {
-		return nil, fmt.Errorf("can't marshal field g: %w", err)
-	}
-	i += offset
+	i += proto.UInt64Marshal(fieldNum, buf, s.FieldG)
 
 	fieldNum = 205
 	if wrongField {
 		fieldNum++
 	}
-	offset, err = proto.Fixed64Marshal(fieldNum, buf, s.FieldI)
-	if err != nil {
-		return nil, fmt.Errorf("can't marshal field I: %w", err)
-	}
-	i += offset
+	i += proto.Fixed64Marshal(fieldNum, buf, s.FieldI)
 
 	fieldNum = 206
 	if wrongField {
 		fieldNum++
 	}
-	offset, err = proto.Float64Marshal(fieldNum, buf, s.FieldJ)
-	if err != nil {
-		return nil, fmt.Errorf("can't marshal field J: %w", err)
-	}
-	i += offset
+	i += proto.Float64Marshal(fieldNum, buf, s.FieldJ)
 
 	fieldNum = 207
 	if wrongField {
@@ -158,11 +121,7 @@ func (s *stablePrimitives) stableMarshal(buf []byte, wrongField bool) ([]byte, e
 	if wrongField {
 		fieldNum++
 	}
-	offset, err = proto.EnumMarshal(fieldNum, buf, int32(s.FieldH))
-	if err != nil {
-		return nil, fmt.Errorf("can't marshal field h: %w", err)
-	}
-	i += offset
+	i += proto.EnumMarshal(fieldNum, buf, int32(s.FieldH))
 
 	return buf, nil
 }
@@ -190,69 +149,43 @@ func (s *stableRepPrimitives) stableMarshal(buf []byte, wrongField bool) ([]byte
 		buf = make([]byte, s.stableSize())
 	}
 
-	var (
-		i, offset, fieldNum int
-	)
+	var i, fieldNum int
 
 	fieldNum = 1
 	if wrongField {
 		fieldNum++
 	}
-	offset, err := proto.RepeatedBytesMarshal(fieldNum, buf, s.FieldA)
-	if err != nil {
-		return nil, fmt.Errorf("can't marshal field a: %w", err)
-	}
-	i += offset
+	i += proto.RepeatedBytesMarshal(fieldNum, buf, s.FieldA)
 
 	fieldNum = 2
 	if wrongField {
 		fieldNum++
 	}
-	offset, err = proto.RepeatedStringMarshal(fieldNum, buf, s.FieldB)
-	if err != nil {
-		return nil, fmt.Errorf("can't marshal field b: %w", err)
-	}
-	i += offset
+	i += proto.RepeatedStringMarshal(fieldNum, buf, s.FieldB)
 
 	fieldNum = 3
 	if wrongField {
 		fieldNum++
 	}
-	offset, err = proto.RepeatedInt32Marshal(fieldNum, buf, s.FieldC)
-	if err != nil {
-		return nil, fmt.Errorf("can't marshal field c: %w", err)
-	}
-	i += offset
+	i += proto.RepeatedInt32Marshal(fieldNum, buf, s.FieldC)
 
 	fieldNum = 4
 	if wrongField {
 		fieldNum++
 	}
-	offset, err = proto.RepeatedUInt32Marshal(fieldNum, buf, s.FieldD)
-	if err != nil {
-		return nil, fmt.Errorf("can't marshal field d: %w", err)
-	}
-	i += offset
+	i += proto.RepeatedUInt32Marshal(fieldNum, buf, s.FieldD)
 
 	fieldNum = 5
 	if wrongField {
 		fieldNum++
 	}
-	offset, err = proto.RepeatedInt64Marshal(fieldNum, buf, s.FieldE)
-	if err != nil {
-		return nil, fmt.Errorf("can't marshal field e: %w", err)
-	}
-	i += offset
+	i += proto.RepeatedInt64Marshal(fieldNum, buf, s.FieldE)
 
 	fieldNum = 6
 	if wrongField {
 		fieldNum++
 	}
-	offset, err = proto.RepeatedUInt64Marshal(fieldNum, buf, s.FieldF)
-	if err != nil {
-		return nil, fmt.Errorf("can't marshal field f: %w", err)
-	}
-	i += offset
+	i += proto.RepeatedUInt64Marshal(fieldNum, buf, s.FieldF)
 
 	return buf, nil
 }