From 8b2734a780c07a2d5c0f5884e0ed65393eb59671 Mon Sep 17 00:00:00 2001
From: Daniel Bourdrez <3641580+bytemare@users.noreply.github.com>
Date: Sat, 22 Apr 2023 01:28:11 +0200
Subject: [PATCH] update secp256k1 dependency (#42)

Signed-off-by: bytemare <3641580+bytemare@users.noreply.github.com>
---
 README.md                   | 2 +-
 go.mod                      | 2 +-
 go.sum                      | 4 ++--
 internal/secp256k1/group.go | 8 +++-----
 4 files changed, 7 insertions(+), 9 deletions(-)

diff --git a/README.md b/README.md
index bdd9f94..7eba719 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@ The following table indexes supported groups with hash-to-curve capability and l
 | 4   | P-384        | filippo.io/nistec             |
 | 5   | P-521        | filippo.io/nistec             |
 | 6   | Edwards25519 | filippo.io/edwards25519       |
-| 7   | Secp256k1    | github.com/bytemare/crypto    |
+| 7   | Secp256k1    | github.com/bytemare/secp256k1 |
 | 8   | Double-Odd   | not yet supported             |
 
 ## Prime-order group interface
diff --git a/go.mod b/go.mod
index bb03855..f201c5b 100644
--- a/go.mod
+++ b/go.mod
@@ -6,7 +6,7 @@ require (
 	filippo.io/edwards25519 v1.0.0
 	filippo.io/nistec v0.0.2
 	github.com/bytemare/hash2curve v0.2.2
-	github.com/bytemare/secp256k1 v0.0.0-20230421210201-f2244bd0effa
+	github.com/bytemare/secp256k1 v0.1.0
 	github.com/gtank/ristretto255 v0.1.2
 )
 
diff --git a/go.sum b/go.sum
index e296000..af79dc6 100644
--- a/go.sum
+++ b/go.sum
@@ -6,8 +6,8 @@ github.com/bytemare/hash v0.1.5 h1:VW+X1YQ2b3chjRFHkRUnO42uclsQjXimdBCPOgIobR4=
 github.com/bytemare/hash v0.1.5/go.mod h1:+QmWXTky/2b63ngqM5IYezGydn9UTFDhpX7mLYwYxCA=
 github.com/bytemare/hash2curve v0.2.2 h1:zaGx6Z4/N4Pl9B7aGNtpbZ09vu1NNJGoJRRtHHl8oTw=
 github.com/bytemare/hash2curve v0.2.2/go.mod h1:Wma3DmJdn8kqiK9j120hkWvC3tQVKS1PyA8ZzyG23BI=
-github.com/bytemare/secp256k1 v0.0.0-20230421210201-f2244bd0effa h1:vrXhOGi25aItUpmJo1ItTZhcv5L7U9/1vdcxL+pKa88=
-github.com/bytemare/secp256k1 v0.0.0-20230421210201-f2244bd0effa/go.mod h1:hzquMsr3GXhVcqL9qFX7GGjmcT5dlQldKrArd7tcXHE=
+github.com/bytemare/secp256k1 v0.1.0 h1:kjVJ06GAHSa+EJ7Rz1LdVgE0DQWdvUT77tmcGf7epXQ=
+github.com/bytemare/secp256k1 v0.1.0/go.mod h1:hzquMsr3GXhVcqL9qFX7GGjmcT5dlQldKrArd7tcXHE=
 github.com/gtank/ristretto255 v0.1.2 h1:JEqUCPA1NvLq5DwYtuzigd7ss8fwbYay9fi4/5uMzcc=
 github.com/gtank/ristretto255 v0.1.2/go.mod h1:Ph5OpO6c7xKUGROZfWVLiJf9icMDwUeIvY4OmlYW69o=
 golang.org/x/crypto v0.8.0 h1:pd9TJtTueMTVQXzk8E2XESSMQDj/U7OUu0PqJqPXQjQ=
diff --git a/internal/secp256k1/group.go b/internal/secp256k1/group.go
index f0b1b03..abe2b58 100644
--- a/internal/secp256k1/group.go
+++ b/internal/secp256k1/group.go
@@ -27,8 +27,6 @@ const (
 	elementLength = 33
 )
 
-var group = secp256k1.New()
-
 // Group represents the Secp256k1 group. It exposes a prime-order group API with hash-to-curve operations.
 type Group struct{}
 
@@ -55,19 +53,19 @@ func (g Group) Base() internal.Element {
 // HashToScalar returns a safe mapping of the arbitrary input to a Scalar.
 // The DST must not be empty or nil, and is recommended to be longer than 16 bytes.
 func (g Group) HashToScalar(input, dst []byte) internal.Scalar {
-	return &Scalar{scalar: group.HashToScalar(input, dst)}
+	return &Scalar{scalar: secp256k1.HashToScalar(input, dst)}
 }
 
 // HashToGroup returns a safe mapping of the arbitrary input to an Element in the Group.
 // The DST must not be empty or nil, and is recommended to be longer than 16 bytes.
 func (g Group) HashToGroup(input, dst []byte) internal.Element {
-	return &Element{element: group.HashToGroup(input, dst)}
+	return &Element{element: secp256k1.HashToGroup(input, dst)}
 }
 
 // EncodeToGroup returns a non-uniform mapping of the arbitrary input to an Element in the Group.
 // The DST must not be empty or nil, and is recommended to be longer than 16 bytes.
 func (g Group) EncodeToGroup(input, dst []byte) internal.Element {
-	return &Element{element: group.EncodeToGroup(input, dst)}
+	return &Element{element: secp256k1.EncodeToGroup(input, dst)}
 }
 
 // Ciphersuite returns the hash-to-curve ciphersuite identifier.