Use hex encoding for JSON instead of raw bytes

.github/licence-header.tmpl

@@ -1,6 +1,6 @@
 SPDX-License-Identifier: MIT
 
-Copyright (C) 2020-2023 Daniel Bourdrez. All Rights Reserved.
+Copyright (C) 2024 Daniel Bourdrez. All Rights Reserved.
 
 This source code is licensed under the MIT license found in the
 LICENSE file in the root directory of this source tree or at

element.go

@@ -148,12 +148,12 @@ func (e *Element) DecodeHex(h string) error {
 
 // MarshalJSON marshals the element into valid JSON.
 func (e *Element) MarshalJSON() ([]byte, error) {
-	return e.Encode(), nil
+	return []byte(e.Hex()), nil
 }
 
 // UnmarshalJSON unmarshals the input into the element.
 func (e *Element) UnmarshalJSON(data []byte) error {
-	return e.Decode(data)
+	return e.DecodeHex(string(data))
 }
 
 // MarshalBinary returns the compressed byte encoding of the element.

scalar.go

@@ -180,12 +180,12 @@ func (s *Scalar) DecodeHex(h string) error {
 
 // MarshalJSON marshals the scalar into valid JSON.
 func (s *Scalar) MarshalJSON() ([]byte, error) {
-	return s.Encode(), nil
+	return []byte(s.Hex()), nil
 }
 
 // UnmarshalJSON unmarshals the input into the scalar.
 func (s *Scalar) UnmarshalJSON(data []byte) error {
-	return s.Decode(data)
+	return s.DecodeHex(string(data))
 }
 
 // MarshalBinary implements the encoding.BinaryMarshaler interface.