import abc
from typing import NewType

EncryptedStr = NewType("EncryptedStr", str)


class Encrypter(abc.ABC):
    @abc.abstractmethod
    def encrypt(self, value: str) -> EncryptedStr: ...

    @abc.abstractmethod
    def decrypt(self, value: EncryptedStr) -> str: ...


class DummyEncrypter(Encrypter):
    def encrypt(self, value: str) -> EncryptedStr:
        return EncryptedStr(value)

    def decrypt(self, value: EncryptedStr) -> str:
        return str(value)