> For the complete documentation index, see [llms.txt](https://docs.hypertensor.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.hypertensor.org/subnet-template/authorizers/authorizer-base.md).

# Authorizer Base

The template comes with an abstract class for developing custom authentication mechanisms.

Authorizers can be unique to each protocol. In the example subnet, the PoS Authorizer is used for the DHT (via DHTProtocol), and the Signature Authorizer is used in the InferenceProtocol.

## Authorizer Base

```python
class AuthorizedRequestBase:
    """
    Interface for protobufs with the ``RequestAuthInfo auth`` field. Used for type annotations only.
    """

    auth: RequestAuthInfo


class AuthorizedResponseBase:
    """
    Interface for protobufs with the ``ResponseAuthInfo auth`` field. Used for type annotations only.
    """

    auth: ResponseAuthInfo


class AuthorizerBase(ABC):
    @abstractmethod
    async def sign_request(
        self, request: AuthorizedRequestBase, service_public_key: Optional[RSAPublicKey]
    ) -> None: ...

    @abstractmethod
    async def validate_request(self, request: AuthorizedRequestBase) -> bool: ...

    @abstractmethod
    async def sign_response(self, response: AuthorizedResponseBase, request: AuthorizedRequestBase) -> None: ...

    @abstractmethod
    async def validate_response(self, response: AuthorizedResponseBase, request: AuthorizedRequestBase) -> bool: ...

```


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