diff --git a/v2/netmap/grpc/marshal.go b/v2/netmap/grpc/marshal.go
deleted file mode 100644
index 58b06852..00000000
--- a/v2/netmap/grpc/marshal.go
+++ /dev/null
@@ -1,362 +0,0 @@
-package netmap
-
-import (
-	"encoding/binary"
-	"math/bits"
-
-	"github.com/pkg/errors"
-)
-
-func (m *PlacementPolicy) StableMarshal(buf []byte) ([]byte, error) {
-	if m == nil {
-		return []byte{}, nil
-	}
-
-	if buf == nil {
-		buf = make([]byte, m.StableSize())
-	}
-
-	var (
-		i, n, offset int
-	)
-
-	// Write replication factor field.
-
-	buf[i] = 0x08 // id:0x1 << 3 | wiretype:0x0
-	offset = binary.PutUvarint(buf[i+1:], uint64(m.ReplFactor))
-	i += 1 + offset
-
-	// write select/filter groups field
-	for j := range m.FilterGroups {
-		buf[i] = 0x12 // id:0x2 << 3 | wiretype:0x2
-
-		n, _ = m.FilterGroups[j].stableSizeWithExclude()
-		offset = binary.PutUvarint(buf[i+1:], uint64(n))
-
-		_, err := m.FilterGroups[j].StableMarshal(buf[i+1+offset:])
-		if err != nil {
-			return nil, errors.Wrapf(err, "can't marshal SFGroup id:%d", j)
-		}
-
-		i += 1 + offset + n
-	}
-
-	return buf, nil
-}
-
-func (m *PlacementPolicy) StableSize() int {
-	if m == nil {
-		return 0
-	}
-
-	var (
-		ln, size int
-	)
-	_ = ln
-
-	// size of replication factor field
-	size += 1 + uvarIntSize(uint64(m.ReplFactor)) // wiretype + varint
-
-	for i := range m.FilterGroups {
-		ln, _ = m.FilterGroups[i].stableSizeWithExclude()
-		size += 1 + uvarIntSize(uint64(ln)) + ln // wiretype + size of struct + struct
-	}
-
-	return size
-}
-
-func (m *PlacementPolicy_FilterGroup) StableMarshal(buf []byte) ([]byte, error) {
-	if m == nil {
-		return []byte{}, nil
-	}
-
-	size, excludeSize := m.stableSizeWithExclude()
-	if buf == nil {
-		buf = make([]byte, size)
-	}
-
-	var (
-		i, n, offset int
-	)
-
-	// write filters field
-	for j := range m.Filters {
-		buf[i] = 0x0A // id:0x1 << 3 | wiretype:0x2
-		n = m.Filters[j].stableSize()
-		offset = binary.PutUvarint(buf[i+1:], uint64(n))
-		_, err := m.Filters[j].StableMarshal(buf[i+1+offset:])
-		if err != nil {
-			return nil, errors.Wrapf(err, "can't marshal Filter id:%d", j)
-		}
-		i += 1 + offset + n
-	}
-
-	// write selectors field
-	for j := range m.Selectors {
-		buf[i] = 0x12 // id:0x2 << 3 | wiretype:0x2
-		n = m.Selectors[j].stableSize()
-		offset = binary.PutUvarint(buf[i+1:], uint64(n))
-		_, err := m.Selectors[j].StableMarshal(buf[i+1+offset:])
-		if err != nil {
-			return nil, errors.Wrapf(err, "can't marshal Selector id:%d", j)
-		}
-		i += 1 + offset + n
-	}
-
-	// write excluded field in packed format
-	buf[i] = 0x1A // id:0x3 << 3 | wiretype:0x2
-	offset = binary.PutUvarint(buf[i+1:], uint64(excludeSize))
-	i += 1 + offset
-	for j := range m.Exclude {
-		offset = binary.PutUvarint(buf[i:], uint64(m.Exclude[j]))
-		i += offset
-	}
-
-	return buf, nil
-}
-
-func (m *PlacementPolicy_FilterGroup) stableSizeWithExclude() (int, int) {
-	if m == nil {
-		return 0, 0
-	}
-
-	var (
-		ln, size int
-	)
-
-	// size of filters field
-	for i := range m.Filters {
-		ln = m.Filters[i].stableSize()
-		size += 1 + uvarIntSize(uint64(ln)) + ln // wiretype + size of struct + struct
-	}
-
-	// size of selectors field
-	for i := range m.Selectors {
-		ln = m.Selectors[i].stableSize()
-		size += 1 + uvarIntSize(uint64(ln)) + ln // wiretype + size of struct + struct
-	}
-
-	// size of exclude field
-	ln = 0
-	for i := range m.Exclude {
-		ln += uvarIntSize(uint64(m.Exclude[i]))
-	}
-	size += 1 + uvarIntSize(uint64(ln)) + ln // wiretype + packed varints size + packed varints
-
-	return size, ln
-}
-
-func (m *PlacementPolicy_FilterGroup_Selector) StableMarshal(buf []byte) ([]byte, error) {
-	if m == nil {
-		return []byte{}, nil
-	}
-
-	if buf == nil {
-		buf = make([]byte, m.stableSize())
-	}
-
-	var (
-		i, offset int
-	)
-
-	// write count field
-	buf[i] = 0x8 // id:0x1 << 3 | wiretype:0x0
-	offset = binary.PutUvarint(buf[i+1:], uint64(m.Count))
-	i += 1 + offset
-
-	// write key field
-	buf[i] = 0x12 // id:0x2 << 3 | wiretype:0x2
-	offset = binary.PutUvarint(buf[i+1:], uint64(len(m.Key)))
-	copy(buf[i+1+offset:], m.Key)
-
-	return buf, nil
-}
-
-func (m *PlacementPolicy_FilterGroup_Selector) stableSize() int {
-	if m == nil {
-		return 0
-	}
-
-	var (
-		ln, size int
-	)
-
-	// size of count field
-	size += 1 + uvarIntSize(uint64(m.Count))
-
-	// size of key field
-	ln = len(m.Key)
-	size += 1 + uvarIntSize(uint64(ln)) + ln
-
-	return size
-}
-
-func (m *PlacementPolicy_FilterGroup_Filter) StableMarshal(buf []byte) ([]byte, error) {
-	if m == nil {
-		return []byte{}, nil
-	}
-
-	if buf == nil {
-		buf = make([]byte, m.stableSize())
-	}
-
-	var (
-		i, n, offset int
-	)
-
-	// write key field
-	buf[i] = 0x0A // id:0x1 << 3 | wiretype:0x2
-	offset = binary.PutUvarint(buf[i+1:], uint64(len(m.Key)))
-	n = copy(buf[i+1+offset:], m.Key)
-	i += 1 + offset + n
-
-	// write simple filter field
-	if m.F != nil {
-		buf[i] = 0x12 // id:0x2 << 3 | wiretype:0x2
-		n = m.F.stableSize()
-		offset = binary.PutUvarint(buf[i+1:], uint64(n))
-		_, err := m.F.StableMarshal(buf[i+1+offset:])
-		if err != nil {
-			return nil, errors.Wrap(err, "can't marshal netmap filter")
-		}
-	}
-
-	return buf, nil
-}
-
-func (m *PlacementPolicy_FilterGroup_Filter) stableSize() int {
-	if m == nil {
-		return 0
-	}
-
-	var (
-		ln, size int
-	)
-
-	// size of key field
-	ln = len(m.Key)
-	size += 1 + uvarIntSize(uint64(ln)) + ln
-
-	// size of simple filter
-	if m.F != nil {
-		ln = m.F.stableSize()
-		size += 1 + uvarIntSize(uint64(ln)) + ln
-	}
-
-	return size
-}
-
-func (m *PlacementPolicy_FilterGroup_Filter_SimpleFilter) StableMarshal(buf []byte) ([]byte, error) {
-	if m == nil {
-		return []byte{}, nil
-	}
-
-	if buf == nil {
-		buf = make([]byte, m.stableSize())
-	}
-
-	var (
-		i, n, offset int
-	)
-
-	// write key field
-	buf[i] = 0x08 // id:0x1 << 3 | wiretype:0x0
-	offset = binary.PutUvarint(buf[i+1:], uint64(m.Op))
-	i += 1 + offset
-
-	// write value if present
-	if val, ok := m.Args.(*PlacementPolicy_FilterGroup_Filter_SimpleFilter_Value); ok {
-		buf[i] = 0x12 // id:0x2 << 3 | wiretype:0x2
-		offset = binary.PutUvarint(buf[i+1:], uint64(len(val.Value)))
-		copy(buf[i+1+offset:], val.Value)
-	} else if filters, ok := m.Args.(*PlacementPolicy_FilterGroup_Filter_SimpleFilter_FArgs); ok {
-		if filters.FArgs != nil {
-			buf[i] = 0x1A // id:0x3 << 3 | wiretype:0x2
-			n = filters.FArgs.stableSize()
-			offset = binary.PutUvarint(buf[i+1:], uint64(n))
-			_, err := filters.FArgs.StableMarshal(buf[i+1+offset:])
-			if err != nil {
-				return nil, errors.Wrap(err, "can't marshal simple filters")
-			}
-		}
-	}
-
-	return buf, nil
-}
-
-func (m *PlacementPolicy_FilterGroup_Filter_SimpleFilter) stableSize() int {
-	if m == nil {
-		return 0
-	}
-
-	var (
-		ln, size int
-	)
-
-	// size of key field
-	size += 1 + uvarIntSize(uint64(m.Op))
-
-	if val, ok := m.Args.(*PlacementPolicy_FilterGroup_Filter_SimpleFilter_Value); ok {
-		// size of value if present
-		ln = len(val.Value)
-		size += 1 + uvarIntSize(uint64(ln)) + ln
-	} else if filters, ok := m.Args.(*PlacementPolicy_FilterGroup_Filter_SimpleFilter_FArgs); ok {
-		// size of simple filters if present
-		if filters.FArgs != nil {
-			ln = filters.FArgs.stableSize()
-			size += 1 + uvarIntSize(uint64(ln)) + ln
-		}
-	}
-
-	return size
-}
-
-func (m *PlacementPolicy_FilterGroup_Filter_SimpleFilter_SimpleFilters) StableMarshal(buf []byte) ([]byte, error) {
-	if m == nil {
-		return []byte{}, nil
-	}
-
-	if buf == nil {
-		buf = make([]byte, m.stableSize())
-	}
-
-	var (
-		i, n, offset int
-	)
-
-	// write filters field
-	for j := range m.Filters {
-		buf[i] = 0x0A // id:0x1 << 3 | wiretype:0x2
-		n = m.Filters[j].stableSize()
-		offset = binary.PutUvarint(buf[i+1:], uint64(n))
-		_, err := m.Filters[j].StableMarshal(buf[i+1+offset:])
-		if err != nil {
-			return nil, errors.Wrapf(err, "can't marshal simple filter id:%d", j)
-		}
-		i += 1 + offset + n
-	}
-
-	return buf, nil
-}
-
-func (m *PlacementPolicy_FilterGroup_Filter_SimpleFilter_SimpleFilters) stableSize() int {
-	if m == nil {
-		return 0
-	}
-	var (
-		ln, size int
-	)
-
-	// size of key field
-	for i := range m.Filters {
-		ln = m.Filters[i].stableSize()
-		size += 1 + uvarIntSize(uint64(ln)) + ln
-	}
-
-	return size
-}
-
-// uvarIntSize returns length of varint byte sequence for uint64 value 'x'.
-func uvarIntSize(x uint64) int {
-	return (bits.Len64(x|1) + 6) / 7
-}