// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.

package folio

import (
	"decl/internal/data"
	"decl/internal/signature"
	"errors"
	"encoding/hex"
)


var (
	ErrInvalidSignature error = errors.New("Invalid signature")
)

type Signature []byte

func (s Signature) Verify(res data.ContentHasher) error {
	i := &signature.Ident{}
	return i.VerifySum(res.Hash(), s)
}

func (s *Signature) SetHexString(sig string) error {
	if v, e := hex.DecodeString(sig); e == nil {
		*s = v
	} else {
		return e
	}
	return nil
}

func (s *Signature) String() string {
	return hex.EncodeToString(*s)
}