# 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: ...

```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.hypertensor.org/subnet-template/authorizers/authorizer-base.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.