def from_json()

in client/json_rpc.py [0:0]

• 26 lines of code
• 8 McCabe index (conditional complexity)

    def from_json(response_json: JSON) -> "ErrorResponse":
        """
        Parse a given JSON into a JSON-RPC error response.
        Raises `InvalidRequestError` if the JSON body is malformed.
        """
        _verify_json_rpc_version(response_json)

        error = response_json.get("error")
        if error is None:
            raise InvalidRequestError(
                f"Required field `error` is missing: {response_json}"
            )
        if not isinstance(error, dict):
            raise InvalidRequestError(f"`error` must be a dict but got {error}")

        code = error.get("code")
        if code is None:
            raise InvalidRequestError(
                f"Required field `error.code` is missing: {response_json}"
            )
        if not isinstance(code, int):
            raise InvalidRequestError(
                f"`error.code` is expected to be an int but got {code}"
            )

        message = error.get("message", "")
        if not isinstance(message, str):
            raise InvalidRequestError(
                f"`error.message` is expected to be a string but got {message}"
            )

        data = error.get("data")
        # FIXME: The `id` field is required for the respnose, but we can't
        # enforce it right now since the Pyre server may emit id-less responses
        # and that has to be fixed first.
        id = _parse_json_rpc_id(response_json)
        return ErrorResponse(id=id, code=code, message=message, data=data)