WIP

Signed-off-by: Leonard Lyubich <leonard@morphbits.io>

accounting/decimal.go

@@ -1,93 +1,107 @@
 package accounting
 
 import (
-	"github.com/nspcc-dev/neofs-api-go/v2/accounting"
+	"fmt"
+
+	"github.com/nspcc-dev/neofs-sdk-go/api/accounting"
+	"google.golang.org/protobuf/proto"
 )
 
 // Decimal represents decimal number for accounting operations.
 //
-// Decimal is mutually compatible with github.com/nspcc-dev/neofs-api-go/v2/accounting.Decimal
-// message. See ReadFromV2 / WriteToV2 methods.
+// Decimal is mutually compatible with [accounting.Decimal] message. See
+// [Decimal.ReadFromV2] / [Decimal.WriteToV2] methods.
 //
 // Instances can be created using built-in var declaration.
-//
-// Note that direct typecast is not safe and may result in loss of compatibility:
-//
-//	_ = Decimal(accounting.Decimal{}) // not recommended
-type Decimal accounting.Decimal
+type Decimal struct {
+	val  int64
+	prec uint32
+}
 
-// ReadFromV2 reads Decimal from the accounting.Decimal message. Checks if the
-// message conforms to NeoFS API V2 protocol.
+// ReadFromV2 reads Decimal from the [accounting.Decimal] message. Returns an
+// error if the message is malformed according to the NeoFS API V2 protocol. The
+// message must not be nil.
 //
-// See also WriteToV2.
-func (d *Decimal) ReadFromV2(m accounting.Decimal) error {
-	*d = Decimal(m)
+// ReadFromV2 is intended to be used by the NeoFS API V2 client/server
+// implementation only and is not expected to be directly used by applications.
+//
+// See also [Decimal.WriteToV2].
+func (d *Decimal) ReadFromV2(m *accounting.Decimal) error {
+	d.val = m.Value
+	d.prec = m.Precision
 	return nil
 }
 
-// WriteToV2 writes Decimal to the accounting.Decimal message.
-// The message must not be nil.
+// WriteToV2 writes Decimal to the [accounting.Decimal] message of the NeoFS API
+// protocol.
+//
+// WriteToV2 is intended to be used by the NeoFS API V2 client/server
+// implementation only and is not expected to be directly used by applications.
 //
-// See also ReadFromV2.
+// See also [Decimal.ReadFromV2].
 func (d Decimal) WriteToV2(m *accounting.Decimal) {
-	*m = (accounting.Decimal)(d)
+	m.Value = d.val
+	m.Precision = d.prec
 }
 
 // Value returns value of the decimal number.
 //
 // Zero Decimal has zero value.
 //
-// See also SetValue.
+// See also [Decimal.SetValue].
 func (d Decimal) Value() int64 {
-	return (*accounting.Decimal)(&d).GetValue()
+	return d.val
 }
 
 // SetValue sets value of the decimal number.
 //
-// See also Value.
+// See also [Decimal.Value].
 func (d *Decimal) SetValue(v int64) {
-	(*accounting.Decimal)(d).SetValue(v)
+	d.val = v
 }
 
 // Precision returns precision of the decimal number.
 //
 // Zero Decimal has zero precision.
 //
-// See also SetPrecision.
+// See also [Decimal.SetPrecision].
 func (d Decimal) Precision() uint32 {
-	return (*accounting.Decimal)(&d).GetPrecision()
+	return d.prec
 }
 
 // SetPrecision sets precision of the decimal number.
 //
-// See also Precision.
+// See also [Decimal.Precision].
 func (d *Decimal) SetPrecision(p uint32) {
-	(*accounting.Decimal)(d).SetPrecision(p)
+	d.prec = p
 }
 
+// TODO: why needed? if so, can be non-deterministic?
+
 // Marshal encodes Decimal into a binary format of the NeoFS API protocol
 // (Protocol Buffers with direct field order).
 //
-// See also Unmarshal.
+// See also [Decimal.Unmarshal].
 func (d Decimal) Marshal() []byte {
 	var m accounting.Decimal
 	d.WriteToV2(&m)
 
-	return m.StableMarshal(nil)
+	b := make([]byte, m.MarshaledSize())
+	m.MarshalStable(b)
+	return b
 }
 
 // Unmarshal decodes NeoFS API protocol binary format into the Decimal
 // (Protocol Buffers with direct field order). Returns an error describing
 // a format violation.
 //
-// See also Marshal.
+// See also [Decimal.Marshal].
 func (d *Decimal) Unmarshal(data []byte) error {
 	var m accounting.Decimal
-
-	err := m.Unmarshal(data)
+	err := proto.Unmarshal(data, &m)
 	if err != nil {
-		return err
+		return fmt.Errorf("decode protobuf")
 	}
 
-	return d.ReadFromV2(m)
+	return d.ReadFromV2(&m)
 }

accounting/decimal_test.go

@@ -3,54 +3,74 @@ package accounting_test
 import (
 	"testing"
 
-	v2accounting "github.com/nspcc-dev/neofs-api-go/v2/accounting"
 	"github.com/nspcc-dev/neofs-sdk-go/accounting"
-	accountingtest "github.com/nspcc-dev/neofs-sdk-go/accounting/test"
+	apiaccounting "github.com/nspcc-dev/neofs-sdk-go/api/accounting"
 	"github.com/stretchr/testify/require"
 )
 
-func TestDecimalData(t *testing.T) {
-	const v, p = 4, 2
+func TestDecimal_Unmarshal(t *testing.T) {
+	t.Run("invalid binary", func(t *testing.T) {
+		var d accounting.Decimal
+		msg := []byte("definitely_not_protobuf")
+		err := d.Unmarshal(msg)
+		require.ErrorContains(t, err, "decode protobuf")
+	})
+}
 
+func testDecimalField[Type uint32 | int64](t *testing.T, get func(accounting.Decimal) Type, set func(*accounting.Decimal, Type),
+	getAPI func(info *apiaccounting.Decimal) Type) {
 	var d accounting.Decimal
 
-	require.Zero(t, d.Value())
-	require.Zero(t, d.Precision())
+	require.Zero(t, get(d))
 
-	d.SetValue(v)
-	d.SetPrecision(p)
+	const val = 13
+	set(&d, val)
+	require.EqualValues(t, val, get(d))
 
-	require.EqualValues(t, v, d.Value())
-	require.EqualValues(t, p, d.Precision())
-}
+	const valOther = 42
+	set(&d, valOther)
+	require.EqualValues(t, valOther, get(d))
 
-func TestDecimalMessageV2(t *testing.T) {
-	var (
-		d accounting.Decimal
-		m v2accounting.Decimal
-	)
+	t.Run("encoding", func(t *testing.T) {
+		t.Run("binary", func(t *testing.T) {
+			var src, dst accounting.Decimal
 
-	m.SetValue(7)
-	m.SetPrecision(8)
+			set(&dst, val)
 
-	require.NoError(t, d.ReadFromV2(m))
+			require.NoError(t, dst.Unmarshal(src.Marshal()))
+			require.Zero(t, get(dst))
 
-	require.EqualValues(t, m.GetValue(), d.Value())
-	require.EqualValues(t, m.GetPrecision(), d.Precision())
+			set(&src, val)
 
-	var m2 v2accounting.Decimal
+			require.NoError(t, dst.Unmarshal(src.Marshal()))
+			require.EqualValues(t, val, get(dst))
+		})
+		t.Run("api", func(t *testing.T) {
+			var src, dst accounting.Decimal
+			var msg apiaccounting.Decimal
 
-	d.WriteToV2(&m2)
+			set(&dst, val)
 
-	require.EqualValues(t, d.Value(), m2.GetValue())
-	require.EqualValues(t, d.Precision(), m2.GetPrecision())
-}
+			src.WriteToV2(&msg)
+			require.Zero(t, getAPI(&msg))
+			require.NoError(t, dst.ReadFromV2(&msg))
+			require.Zero(t, get(dst))
 
-func TestDecimal_Marshal(t *testing.T) {
-	d := accountingtest.Decimal()
+			set(&src, val)
 
-	var d2 accounting.Decimal
-	require.NoError(t, d2.Unmarshal(d.Marshal()))
+			src.WriteToV2(&msg)
+			require.EqualValues(t, val, getAPI(&msg))
+			err := dst.ReadFromV2(&msg)
+			require.NoError(t, err)
+			require.EqualValues(t, val, get(dst))
+		})
+	})
+}
+
+func TestDecimal_SetValue(t *testing.T) {
+	testDecimalField(t, accounting.Decimal.Value, (*accounting.Decimal).SetValue, (*apiaccounting.Decimal).GetValue)
+}
 
-	require.Equal(t, d, d2)
+func TestDecimal_SetPrecision(t *testing.T) {
+	testDecimalField(t, accounting.Decimal.Precision, (*accounting.Decimal).SetPrecision, (*apiaccounting.Decimal).GetPrecision)
 }

accounting/example_test.go

@@ -1,8 +1,8 @@
 package accounting_test
 
 import (
-	apiGoAccounting "github.com/nspcc-dev/neofs-api-go/v2/accounting"
 	"github.com/nspcc-dev/neofs-sdk-go/accounting"
+	apiaccounting "github.com/nspcc-dev/neofs-sdk-go/api/accounting"
 )
 
 func Example() {
@@ -16,11 +16,10 @@ func Example() {
 
 	// On the client side.
 
-	// import apiGoAccounting "github.com/nspcc-dev/neofs-api-go/v2/accounting"
-	var msg apiGoAccounting.Decimal
+	var msg apiaccounting.Decimal
 	dec.WriteToV2(&msg)
 	// *send message*
 
 	// On the server side.
-	_ = dec.ReadFromV2(msg)
+	_ = dec.ReadFromV2(&msg)
 }

accounting/test/decimal_test.go

@@ -0,0 +1,25 @@
+package accountingtest_test
+
+import (
+	"testing"
+
+	"github.com/nspcc-dev/neofs-sdk-go/accounting"
+	accountingtest "github.com/nspcc-dev/neofs-sdk-go/accounting/test"
+	apiaccounting "github.com/nspcc-dev/neofs-sdk-go/api/accounting"
+	"github.com/stretchr/testify/require"
+)
+
+func TestDecimal(t *testing.T) {
+	d := accountingtest.Decimal()
+	require.NotEqual(t, d, accountingtest.Decimal())
+
+	var d2 accounting.Decimal
+	require.NoError(t, d2.Unmarshal(d.Marshal()))
+	require.Equal(t, d, d2)
+
+	var m apiaccounting.Decimal
+	d.WriteToV2(&m)
+	var d3 accounting.Decimal
+	require.NoError(t, d3.ReadFromV2(&m))
+	require.Equal(t, d, d3)
+}

api/accounting/encoding.go

@@ -0,0 +1,65 @@
+package accounting
+
+import (
+	"github.com/nspcc-dev/neofs-sdk-go/internal/proto"
+)
+
+const (
+	_ = iota
+	fieldDecimalValue
+	fieldDecimalPrecision
+)
+
+func (x *Decimal) MarshaledSize() int {
+	var sz int
+	if x != nil {
+		sz = proto.SizeVarint(fieldDecimalValue, x.Value) +
+			proto.SizeVarint(fieldDecimalPrecision, x.Precision)
+	}
+	return sz
+}
+
+func (x *Decimal) MarshalStable(b []byte) {
+	if x != nil {
+		off := proto.MarshalVarint(b, fieldDecimalValue, x.Value)
+		proto.MarshalVarint(b[off:], fieldDecimalPrecision, x.Precision)
+	}
+}
+
+const (
+	_ = iota
+	fieldBalanceReqOwner
+)
+
+func (x *BalanceRequest_Body) MarshaledSize() int {
+	var sz int
+	if x != nil {
+		sz = proto.SizeNested(fieldBalanceReqOwner, x.OwnerId)
+	}
+	return sz
+}
+
+func (x *BalanceRequest_Body) MarshalStable(b []byte) {
+	if x != nil {
+		proto.MarshalNested(b, fieldBalanceReqOwner, x.OwnerId)
+	}
+}
+
+const (
+	_ = iota
+	fieldBalanceRespBalance
+)
+
+func (x *BalanceResponse_Body) MarshaledSize() int {
+	var sz int
+	if x != nil {
+		sz = proto.SizeNested(fieldBalanceRespBalance, x.Balance)
+	}
+	return sz
+}
+
+func (x *BalanceResponse_Body) MarshalStable(b []byte) {
+	if x != nil {
+		proto.MarshalNested(b, fieldBalanceRespBalance, x.Balance)
+	}
+}