fix: Refactor crypto

crypto/signatures/schnorr/mina/signature.go

@@ -1,49 +0,0 @@
-//
-// Copyright Coinbase, Inc. All Rights Reserved.
-//
-// SPDX-License-Identifier: Apache-2.0
-//
-
-package mina
-
-import (
-	"fmt"
-
-	"github.com/onsonr/sonr/crypto/core/curves/native/pasta/fp"
-	"github.com/onsonr/sonr/crypto/core/curves/native/pasta/fq"
-)
-
-// Signature is a Mina compatible signature either for payment or delegation
-type Signature struct {
-	R *fp.Fp
-	S *fq.Fq
-}
-
-func (sig Signature) MarshalBinary() ([]byte, error) {
-	var buf [64]byte
-	rx := sig.R.Bytes()
-	s := sig.S.Bytes()
-	copy(buf[:32], rx[:])
-	copy(buf[32:], s[:])
-	return buf[:], nil
-}
-
-func (sig *Signature) UnmarshalBinary(input []byte) error {
-	if len(input) != 64 {
-		return fmt.Errorf("invalid byte sequence")
-	}
-	var buf [32]byte
-	copy(buf[:], input[:32])
-	rx, err := new(fp.Fp).SetBytes(&buf)
-	if err != nil {
-		return err
-	}
-	copy(buf[:], input[32:])
-	s, err := new(fq.Fq).SetBytes(&buf)
-	if err != nil {
-		return err
-	}
-	sig.R = rx
-	sig.S = s
-	return nil
-}