v2/accounting: Implement Decimal uni-structure

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

v2/accounting/accounting.go

@@ -17,6 +17,12 @@ type BalanceRequest struct {
 	verifyHeader *service.RequestVerificationHeader
 }
 
+type Decimal struct {
+	val int64
+
+	prec uint32
+}
+
 func (b *BalanceRequestBody) GetOwnerID() *refs.OwnerID {
 	if b != nil {
 		return b.ownerID
@@ -88,3 +94,31 @@ func (b *BalanceRequest) SetRequestVerificationHeader(v *service.RequestVerifica
 		b.verifyHeader = v
 	}
 }
+
+func (d *Decimal) GetValue() int64 {
+	if d != nil {
+		return d.val
+	}
+
+	return 0
+}
+
+func (d *Decimal) SetValue(v int64) {
+	if d != nil {
+		d.val = v
+	}
+}
+
+func (d *Decimal) GetPrecision() uint32 {
+	if d != nil {
+		return d.prec
+	}
+
+	return 0
+}
+
+func (d *Decimal) SetPrecision(v uint32) {
+	if d != nil {
+		d.prec = v
+	}
+}

v2/accounting/convert.go

@@ -65,3 +65,29 @@ func BalanceRequestFromGRPCMessage(m *accounting.BalanceRequest) *BalanceRequest
 
 	return b
 }
+
+func DecimalToGRPCMessage(d *Decimal) *accounting.Decimal {
+	if d == nil {
+		return nil
+	}
+
+	m := new(accounting.Decimal)
+
+	m.SetValue(d.GetValue())
+	m.SetPrecision(d.GetPrecision())
+
+	return m
+}
+
+func DecimalFromGRPCMessage(m *accounting.Decimal) *Decimal {
+	if m == nil {
+		return nil
+	}
+
+	d := new(Decimal)
+
+	d.SetValue(m.GetValue())
+	d.SetPrecision(m.GetPrecision())
+
+	return d
+}