From 1ac6b819c577b7bf2e564a5c2c4d868601e1a8e5 Mon Sep 17 00:00:00 2001
From: Evgenii Stratonikov <evgeniy@nspcc.ru>
Date: Wed, 27 Oct 2021 10:38:04 +0300
Subject: [PATCH] [#44] signature: move package from neofs-api-go

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
---
 signature/signature.go      | 71 +++++++++++++++++++++++++++++++++++++
 signature/signature_test.go | 66 ++++++++++++++++++++++++++++++++++
 2 files changed, 137 insertions(+)
 create mode 100644 signature/signature.go
 create mode 100644 signature/signature_test.go

diff --git a/signature/signature.go b/signature/signature.go
new file mode 100644
index 0000000..c0007cc
--- /dev/null
+++ b/signature/signature.go
@@ -0,0 +1,71 @@
+package signature
+
+import (
+	"github.com/nspcc-dev/neofs-api-go/v2/refs"
+)
+
+// Signature represents v2-compatible signature.
+type Signature refs.Signature
+
+// NewFromV2 wraps v2 Signature message to Signature.
+//
+// Nil refs.Signature converts to nil.
+func NewFromV2(sV2 *refs.Signature) *Signature {
+	return (*Signature)(sV2)
+}
+
+// New creates and initializes blank Signature.
+//
+// Defaults:
+//  - key: nil;
+//  - signature: nil.
+func New() *Signature {
+	return NewFromV2(new(refs.Signature))
+}
+
+// Key sets binary public key.
+func (s *Signature) Key() []byte {
+	return (*refs.Signature)(s).GetKey()
+}
+
+// SetKey returns binary public key.
+func (s *Signature) SetKey(v []byte) {
+	(*refs.Signature)(s).SetKey(v)
+}
+
+// Sign return signature value.
+func (s *Signature) Sign() []byte {
+	return (*refs.Signature)(s).GetSign()
+}
+
+// SetSign sets signature value.
+func (s *Signature) SetSign(v []byte) {
+	(*refs.Signature)(s).SetSign(v)
+}
+
+// ToV2 converts Signature to v2 Signature message.
+//
+// Nil Signature converts to nil.
+func (s *Signature) ToV2() *refs.Signature {
+	return (*refs.Signature)(s)
+}
+
+// Marshal marshals Signature into a protobuf binary form.
+func (s *Signature) Marshal() ([]byte, error) {
+	return (*refs.Signature)(s).StableMarshal(nil)
+}
+
+// Unmarshal unmarshals protobuf binary representation of Signature.
+func (s *Signature) Unmarshal(data []byte) error {
+	return (*refs.Signature)(s).Unmarshal(data)
+}
+
+// MarshalJSON encodes Signature to protobuf JSON format.
+func (s *Signature) MarshalJSON() ([]byte, error) {
+	return (*refs.Signature)(s).MarshalJSON()
+}
+
+// UnmarshalJSON decodes Signature from protobuf JSON format.
+func (s *Signature) UnmarshalJSON(data []byte) error {
+	return (*refs.Signature)(s).UnmarshalJSON(data)
+}
diff --git a/signature/signature_test.go b/signature/signature_test.go
new file mode 100644
index 0000000..479546c
--- /dev/null
+++ b/signature/signature_test.go
@@ -0,0 +1,66 @@
+package signature
+
+import (
+	"testing"
+
+	"github.com/nspcc-dev/neofs-api-go/v2/refs"
+	"github.com/stretchr/testify/require"
+)
+
+func TestSignatureEncoding(t *testing.T) {
+	s := New()
+	s.SetKey([]byte("key"))
+	s.SetSign([]byte("sign"))
+
+	t.Run("binary", func(t *testing.T) {
+		data, err := s.Marshal()
+		require.NoError(t, err)
+
+		s2 := New()
+		require.NoError(t, s2.Unmarshal(data))
+
+		require.Equal(t, s, s2)
+	})
+
+	t.Run("json", func(t *testing.T) {
+		data, err := s.MarshalJSON()
+		require.NoError(t, err)
+
+		s2 := New()
+		require.NoError(t, s2.UnmarshalJSON(data))
+
+		require.Equal(t, s, s2)
+	})
+}
+
+func TestNewSignatureFromV2(t *testing.T) {
+	t.Run("from nil", func(t *testing.T) {
+		var x *refs.Signature
+
+		require.Nil(t, NewFromV2(x))
+	})
+}
+
+func TestSignature_ToV2(t *testing.T) {
+	t.Run("nil", func(t *testing.T) {
+		var x *Signature
+
+		require.Nil(t, x.ToV2())
+	})
+}
+
+func TestNewSignature(t *testing.T) {
+	t.Run("default values", func(t *testing.T) {
+		sg := New()
+
+		// check initial values
+		require.Nil(t, sg.Key())
+		require.Nil(t, sg.Sign())
+
+		// convert to v2 message
+		sgV2 := sg.ToV2()
+
+		require.Nil(t, sgV2.GetKey())
+		require.Nil(t, sgV2.GetSign())
+	})
+}