secp256k1.go
func (k *Secp256k1PublicKey) Raw() ([]byte, error) {
	return (*btcec.PublicKey)(k).SerializeCompressed(), nil
}
func (k *Secp256k1PublicKey) Raw() ([]byte, error) {
	return (*btcec.PublicKey)(k).SerializeCompressed(), nil
}
// Raw returns the bytes of the key