fix: Refactor crypto

crypto/ted25519/frost/challenge_derive.go

@@ -1,27 +0,0 @@
-//
-// Copyright Coinbase, Inc. All Rights Reserved.
-//
-// SPDX-License-Identifier: Apache-2.0
-//
-
-package frost
-
-import (
-	"crypto/sha512"
-
-	"github.com/onsonr/sonr/crypto/core/curves"
-)
-
-type ChallengeDerive interface {
-	DeriveChallenge(msg []byte, pubKey curves.Point, r curves.Point) (curves.Scalar, error)
-}
-
-type Ed25519ChallengeDeriver struct{}
-
-func (ed Ed25519ChallengeDeriver) DeriveChallenge(msg []byte, pubKey curves.Point, r curves.Point) (curves.Scalar, error) {
-	h := sha512.New()
-	_, _ = h.Write(r.ToAffineCompressed())
-	_, _ = h.Write(pubKey.ToAffineCompressed())
-	_, _ = h.Write(msg)
-	return new(curves.ScalarEd25519).SetBytesWide(h.Sum(nil))
-}