two version of R2R are here HEAD master

3 files changed, 1342 insertions, 0 deletions

diff --git a/.venv/lib/python3.12/site-packages/grpc/framework/interfaces/face/__init__.py b/.venv/lib/python3.12/site-packages/grpc/framework/interfaces/face/__init__.py
new file mode 100644
index 00000000..5fb4f3c3
--- /dev/null
+++ b/.venv/lib/python3.12/site-packages/grpc/framework/interfaces/face/__init__.py
@@ -0,0 +1,13 @@
+# Copyright 2015 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
diff --git a/.venv/lib/python3.12/site-packages/grpc/framework/interfaces/face/face.py b/.venv/lib/python3.12/site-packages/grpc/framework/interfaces/face/face.py
new file mode 100644
index 00000000..9239fcc9
--- /dev/null
+++ b/.venv/lib/python3.12/site-packages/grpc/framework/interfaces/face/face.py
@@ -0,0 +1,1084 @@
+# Copyright 2015 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Interfaces defining the Face layer of RPC Framework."""
+
+import abc
+import collections
+import enum
+
+# cardinality, style, abandonment, future, and stream are
+# referenced from specification in this module.
+from grpc.framework.common import cardinality  # pylint: disable=unused-import
+from grpc.framework.common import style  # pylint: disable=unused-import
+from grpc.framework.foundation import future  # pylint: disable=unused-import
+from grpc.framework.foundation import stream  # pylint: disable=unused-import
+
+# pylint: disable=too-many-arguments
+
+
+class NoSuchMethodError(Exception):
+    """Raised by customer code to indicate an unrecognized method.
+
+    Attributes:
+      group: The group of the unrecognized method.
+      name: The name of the unrecognized method.
+    """
+
+    def __init__(self, group, method):
+        """Constructor.
+
+        Args:
+          group: The group identifier of the unrecognized RPC name.
+          method: The method identifier of the unrecognized RPC name.
+        """
+        super(NoSuchMethodError, self).__init__()
+        self.group = group
+        self.method = method
+
+    def __repr__(self):
+        return "face.NoSuchMethodError(%s, %s)" % (
+            self.group,
+            self.method,
+        )
+
+
+class Abortion(
+    collections.namedtuple(
+        "Abortion",
+        (
+            "kind",
+            "initial_metadata",
+            "terminal_metadata",
+            "code",
+            "details",
+        ),
+    )
+):
+    """A value describing RPC abortion.
+
+    Attributes:
+      kind: A Kind value identifying how the RPC failed.
+      initial_metadata: The initial metadata from the other side of the RPC or
+        None if no initial metadata value was received.
+      terminal_metadata: The terminal metadata from the other side of the RPC or
+        None if no terminal metadata value was received.
+      code: The code value from the other side of the RPC or None if no code value
+        was received.
+      details: The details value from the other side of the RPC or None if no
+        details value was received.
+    """
+
+    @enum.unique
+    class Kind(enum.Enum):
+        """Types of RPC abortion."""
+
+        CANCELLED = "cancelled"
+        EXPIRED = "expired"
+        LOCAL_SHUTDOWN = "local shutdown"
+        REMOTE_SHUTDOWN = "remote shutdown"
+        NETWORK_FAILURE = "network failure"
+        LOCAL_FAILURE = "local failure"
+        REMOTE_FAILURE = "remote failure"
+
+
+class AbortionError(Exception, metaclass=abc.ABCMeta):
+    """Common super type for exceptions indicating RPC abortion.
+
+    initial_metadata: The initial metadata from the other side of the RPC or
+      None if no initial metadata value was received.
+    terminal_metadata: The terminal metadata from the other side of the RPC or
+      None if no terminal metadata value was received.
+    code: The code value from the other side of the RPC or None if no code value
+      was received.
+    details: The details value from the other side of the RPC or None if no
+      details value was received.
+    """
+
+    def __init__(self, initial_metadata, terminal_metadata, code, details):
+        super(AbortionError, self).__init__()
+        self.initial_metadata = initial_metadata
+        self.terminal_metadata = terminal_metadata
+        self.code = code
+        self.details = details
+
+    def __str__(self):
+        return '%s(code=%s, details="%s")' % (
+            self.__class__.__name__,
+            self.code,
+            self.details,
+        )
+
+
+class CancellationError(AbortionError):
+    """Indicates that an RPC has been cancelled."""
+
+
+class ExpirationError(AbortionError):
+    """Indicates that an RPC has expired ("timed out")."""
+
+
+class LocalShutdownError(AbortionError):
+    """Indicates that an RPC has terminated due to local shutdown of RPCs."""
+
+
+class RemoteShutdownError(AbortionError):
+    """Indicates that an RPC has terminated due to remote shutdown of RPCs."""
+
+
+class NetworkError(AbortionError):
+    """Indicates that some error occurred on the network."""
+
+
+class LocalError(AbortionError):
+    """Indicates that an RPC has terminated due to a local defect."""
+
+
+class RemoteError(AbortionError):
+    """Indicates that an RPC has terminated due to a remote defect."""
+
+
+class RpcContext(abc.ABC):
+    """Provides RPC-related information and action."""
+
+    @abc.abstractmethod
+    def is_active(self):
+        """Describes whether the RPC is active or has terminated."""
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def time_remaining(self):
+        """Describes the length of allowed time remaining for the RPC.
+
+        Returns:
+          A nonnegative float indicating the length of allowed time in seconds
+          remaining for the RPC to complete before it is considered to have timed
+          out.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def add_abortion_callback(self, abortion_callback):
+        """Registers a callback to be called if the RPC is aborted.
+
+        Args:
+          abortion_callback: A callable to be called and passed an Abortion value
+            in the event of RPC abortion.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def cancel(self):
+        """Cancels the RPC.
+
+        Idempotent and has no effect if the RPC has already terminated.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def protocol_context(self):
+        """Accesses a custom object specified by an implementation provider.
+
+        Returns:
+          A value specified by the provider of a Face interface implementation
+            affording custom state and behavior.
+        """
+        raise NotImplementedError()
+
+
+class Call(RpcContext, metaclass=abc.ABCMeta):
+    """Invocation-side utility object for an RPC."""
+
+    @abc.abstractmethod
+    def initial_metadata(self):
+        """Accesses the initial metadata from the service-side of the RPC.
+
+        This method blocks until the value is available or is known not to have been
+        emitted from the service-side of the RPC.
+
+        Returns:
+          The initial metadata object emitted by the service-side of the RPC, or
+            None if there was no such value.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def terminal_metadata(self):
+        """Accesses the terminal metadata from the service-side of the RPC.
+
+        This method blocks until the value is available or is known not to have been
+        emitted from the service-side of the RPC.
+
+        Returns:
+          The terminal metadata object emitted by the service-side of the RPC, or
+            None if there was no such value.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def code(self):
+        """Accesses the code emitted by the service-side of the RPC.
+
+        This method blocks until the value is available or is known not to have been
+        emitted from the service-side of the RPC.
+
+        Returns:
+          The code object emitted by the service-side of the RPC, or None if there
+            was no such value.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def details(self):
+        """Accesses the details value emitted by the service-side of the RPC.
+
+        This method blocks until the value is available or is known not to have been
+        emitted from the service-side of the RPC.
+
+        Returns:
+          The details value emitted by the service-side of the RPC, or None if there
+            was no such value.
+        """
+        raise NotImplementedError()
+
+
+class ServicerContext(RpcContext, metaclass=abc.ABCMeta):
+    """A context object passed to method implementations."""
+
+    @abc.abstractmethod
+    def invocation_metadata(self):
+        """Accesses the metadata from the invocation-side of the RPC.
+
+        This method blocks until the value is available or is known not to have been
+        emitted from the invocation-side of the RPC.
+
+        Returns:
+          The metadata object emitted by the invocation-side of the RPC, or None if
+            there was no such value.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def initial_metadata(self, initial_metadata):
+        """Accepts the service-side initial metadata value of the RPC.
+
+        This method need not be called by method implementations if they have no
+        service-side initial metadata to transmit.
+
+        Args:
+          initial_metadata: The service-side initial metadata value of the RPC to
+            be transmitted to the invocation side of the RPC.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def terminal_metadata(self, terminal_metadata):
+        """Accepts the service-side terminal metadata value of the RPC.
+
+        This method need not be called by method implementations if they have no
+        service-side terminal metadata to transmit.
+
+        Args:
+          terminal_metadata: The service-side terminal metadata value of the RPC to
+            be transmitted to the invocation side of the RPC.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def code(self, code):
+        """Accepts the service-side code of the RPC.
+
+        This method need not be called by method implementations if they have no
+        code to transmit.
+
+        Args:
+          code: The code of the RPC to be transmitted to the invocation side of the
+            RPC.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def details(self, details):
+        """Accepts the service-side details of the RPC.
+
+        This method need not be called by method implementations if they have no
+        service-side details to transmit.
+
+        Args:
+          details: The service-side details value of the RPC to be transmitted to
+            the invocation side of the RPC.
+        """
+        raise NotImplementedError()
+
+
+class ResponseReceiver(abc.ABC):
+    """Invocation-side object used to accept the output of an RPC."""
+
+    @abc.abstractmethod
+    def initial_metadata(self, initial_metadata):
+        """Receives the initial metadata from the service-side of the RPC.
+
+        Args:
+          initial_metadata: The initial metadata object emitted from the
+            service-side of the RPC.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def response(self, response):
+        """Receives a response from the service-side of the RPC.
+
+        Args:
+          response: A response object emitted from the service-side of the RPC.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def complete(self, terminal_metadata, code, details):
+        """Receives the completion values emitted from the service-side of the RPC.
+
+        Args:
+          terminal_metadata: The terminal metadata object emitted from the
+            service-side of the RPC.
+          code: The code object emitted from the service-side of the RPC.
+          details: The details object emitted from the service-side of the RPC.
+        """
+        raise NotImplementedError()
+
+
+class UnaryUnaryMultiCallable(abc.ABC):
+    """Affords invoking a unary-unary RPC in any call style."""
+
+    @abc.abstractmethod
+    def __call__(
+        self,
+        request,
+        timeout,
+        metadata=None,
+        with_call=False,
+        protocol_options=None,
+    ):
+        """Synchronously invokes the underlying RPC.
+
+        Args:
+          request: The request value for the RPC.
+          timeout: A duration of time in seconds to allow for the RPC.
+          metadata: A metadata value to be passed to the service-side of
+            the RPC.
+          with_call: Whether or not to include return a Call for the RPC in addition
+            to the response.
+          protocol_options: A value specified by the provider of a Face interface
+            implementation affording custom state and behavior.
+
+        Returns:
+          The response value for the RPC, and a Call for the RPC if with_call was
+            set to True at invocation.
+
+        Raises:
+          AbortionError: Indicating that the RPC was aborted.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def future(self, request, timeout, metadata=None, protocol_options=None):
+        """Asynchronously invokes the underlying RPC.
+
+        Args:
+          request: The request value for the RPC.
+          timeout: A duration of time in seconds to allow for the RPC.
+          metadata: A metadata value to be passed to the service-side of
+            the RPC.
+          protocol_options: A value specified by the provider of a Face interface
+            implementation affording custom state and behavior.
+
+        Returns:
+          An object that is both a Call for the RPC and a future.Future. In the
+            event of RPC completion, the return Future's result value will be the
+            response value of the RPC. In the event of RPC abortion, the returned
+            Future's exception value will be an AbortionError.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def event(
+        self,
+        request,
+        receiver,
+        abortion_callback,
+        timeout,
+        metadata=None,
+        protocol_options=None,
+    ):
+        """Asynchronously invokes the underlying RPC.
+
+        Args:
+          request: The request value for the RPC.
+          receiver: A ResponseReceiver to be passed the response data of the RPC.
+          abortion_callback: A callback to be called and passed an Abortion value
+            in the event of RPC abortion.
+          timeout: A duration of time in seconds to allow for the RPC.
+          metadata: A metadata value to be passed to the service-side of
+            the RPC.
+          protocol_options: A value specified by the provider of a Face interface
+            implementation affording custom state and behavior.
+
+        Returns:
+          A Call for the RPC.
+        """
+        raise NotImplementedError()
+
+
+class UnaryStreamMultiCallable(abc.ABC):
+    """Affords invoking a unary-stream RPC in any call style."""
+
+    @abc.abstractmethod
+    def __call__(self, request, timeout, metadata=None, protocol_options=None):
+        """Invokes the underlying RPC.
+
+        Args:
+          request: The request value for the RPC.
+          timeout: A duration of time in seconds to allow for the RPC.
+          metadata: A metadata value to be passed to the service-side of
+            the RPC.
+          protocol_options: A value specified by the provider of a Face interface
+            implementation affording custom state and behavior.
+
+        Returns:
+          An object that is both a Call for the RPC and an iterator of response
+            values. Drawing response values from the returned iterator may raise
+            AbortionError indicating abortion of the RPC.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def event(
+        self,
+        request,
+        receiver,
+        abortion_callback,
+        timeout,
+        metadata=None,
+        protocol_options=None,
+    ):
+        """Asynchronously invokes the underlying RPC.
+
+        Args:
+          request: The request value for the RPC.
+          receiver: A ResponseReceiver to be passed the response data of the RPC.
+          abortion_callback: A callback to be called and passed an Abortion value
+            in the event of RPC abortion.
+          timeout: A duration of time in seconds to allow for the RPC.
+          metadata: A metadata value to be passed to the service-side of
+            the RPC.
+          protocol_options: A value specified by the provider of a Face interface
+            implementation affording custom state and behavior.
+
+        Returns:
+          A Call object for the RPC.
+        """
+        raise NotImplementedError()
+
+
+class StreamUnaryMultiCallable(abc.ABC):
+    """Affords invoking a stream-unary RPC in any call style."""
+
+    @abc.abstractmethod
+    def __call__(
+        self,
+        request_iterator,
+        timeout,
+        metadata=None,
+        with_call=False,
+        protocol_options=None,
+    ):
+        """Synchronously invokes the underlying RPC.
+
+        Args:
+          request_iterator: An iterator that yields request values for the RPC.
+          timeout: A duration of time in seconds to allow for the RPC.
+          metadata: A metadata value to be passed to the service-side of
+            the RPC.
+          with_call: Whether or not to include return a Call for the RPC in addition
+            to the response.
+          protocol_options: A value specified by the provider of a Face interface
+            implementation affording custom state and behavior.
+
+        Returns:
+          The response value for the RPC, and a Call for the RPC if with_call was
+            set to True at invocation.
+
+        Raises:
+          AbortionError: Indicating that the RPC was aborted.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def future(
+        self, request_iterator, timeout, metadata=None, protocol_options=None
+    ):
+        """Asynchronously invokes the underlying RPC.
+
+        Args:
+          request_iterator: An iterator that yields request values for the RPC.
+          timeout: A duration of time in seconds to allow for the RPC.
+          metadata: A metadata value to be passed to the service-side of
+            the RPC.
+          protocol_options: A value specified by the provider of a Face interface
+            implementation affording custom state and behavior.
+
+        Returns:
+          An object that is both a Call for the RPC and a future.Future. In the
+            event of RPC completion, the return Future's result value will be the
+            response value of the RPC. In the event of RPC abortion, the returned
+            Future's exception value will be an AbortionError.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def event(
+        self,
+        receiver,
+        abortion_callback,
+        timeout,
+        metadata=None,
+        protocol_options=None,
+    ):
+        """Asynchronously invokes the underlying RPC.
+
+        Args:
+          receiver: A ResponseReceiver to be passed the response data of the RPC.
+          abortion_callback: A callback to be called and passed an Abortion value
+            in the event of RPC abortion.
+          timeout: A duration of time in seconds to allow for the RPC.
+          metadata: A metadata value to be passed to the service-side of
+            the RPC.
+          protocol_options: A value specified by the provider of a Face interface
+            implementation affording custom state and behavior.
+
+        Returns:
+          A single object that is both a Call object for the RPC and a
+            stream.Consumer to which the request values of the RPC should be passed.
+        """
+        raise NotImplementedError()
+
+
+class StreamStreamMultiCallable(abc.ABC):
+    """Affords invoking a stream-stream RPC in any call style."""
+
+    @abc.abstractmethod
+    def __call__(
+        self, request_iterator, timeout, metadata=None, protocol_options=None
+    ):
+        """Invokes the underlying RPC.
+
+        Args:
+          request_iterator: An iterator that yields request values for the RPC.
+          timeout: A duration of time in seconds to allow for the RPC.
+          metadata: A metadata value to be passed to the service-side of
+            the RPC.
+          protocol_options: A value specified by the provider of a Face interface
+            implementation affording custom state and behavior.
+
+        Returns:
+          An object that is both a Call for the RPC and an iterator of response
+            values. Drawing response values from the returned iterator may raise
+            AbortionError indicating abortion of the RPC.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def event(
+        self,
+        receiver,
+        abortion_callback,
+        timeout,
+        metadata=None,
+        protocol_options=None,
+    ):
+        """Asynchronously invokes the underlying RPC.
+
+        Args:
+          receiver: A ResponseReceiver to be passed the response data of the RPC.
+          abortion_callback: A callback to be called and passed an Abortion value
+            in the event of RPC abortion.
+          timeout: A duration of time in seconds to allow for the RPC.
+          metadata: A metadata value to be passed to the service-side of
+            the RPC.
+          protocol_options: A value specified by the provider of a Face interface
+            implementation affording custom state and behavior.
+
+        Returns:
+          A single object that is both a Call object for the RPC and a
+            stream.Consumer to which the request values of the RPC should be passed.
+        """
+        raise NotImplementedError()
+
+
+class MethodImplementation(abc.ABC):
+    """A sum type that describes a method implementation.
+
+    Attributes:
+      cardinality: A cardinality.Cardinality value.
+      style: A style.Service value.
+      unary_unary_inline: The implementation of the method as a callable value
+        that takes a request value and a ServicerContext object and returns a
+        response value. Only non-None if cardinality is
+        cardinality.Cardinality.UNARY_UNARY and style is style.Service.INLINE.
+      unary_stream_inline: The implementation of the method as a callable value
+        that takes a request value and a ServicerContext object and returns an
+        iterator of response values. Only non-None if cardinality is
+        cardinality.Cardinality.UNARY_STREAM and style is style.Service.INLINE.
+      stream_unary_inline: The implementation of the method as a callable value
+        that takes an iterator of request values and a ServicerContext object and
+        returns a response value. Only non-None if cardinality is
+        cardinality.Cardinality.STREAM_UNARY and style is style.Service.INLINE.
+      stream_stream_inline: The implementation of the method as a callable value
+        that takes an iterator of request values and a ServicerContext object and
+        returns an iterator of response values. Only non-None if cardinality is
+        cardinality.Cardinality.STREAM_STREAM and style is style.Service.INLINE.
+      unary_unary_event: The implementation of the method as a callable value that
+        takes a request value, a response callback to which to pass the response
+        value of the RPC, and a ServicerContext. Only non-None if cardinality is
+        cardinality.Cardinality.UNARY_UNARY and style is style.Service.EVENT.
+      unary_stream_event: The implementation of the method as a callable value
+        that takes a request value, a stream.Consumer to which to pass the
+        response values of the RPC, and a ServicerContext. Only non-None if
+        cardinality is cardinality.Cardinality.UNARY_STREAM and style is
+        style.Service.EVENT.
+      stream_unary_event: The implementation of the method as a callable value
+        that takes a response callback to which to pass the response value of the
+        RPC and a ServicerContext and returns a stream.Consumer to which the
+        request values of the RPC should be passed. Only non-None if cardinality
+        is cardinality.Cardinality.STREAM_UNARY and style is style.Service.EVENT.
+      stream_stream_event: The implementation of the method as a callable value
+        that takes a stream.Consumer to which to pass the response values of the
+        RPC and a ServicerContext and returns a stream.Consumer to which the
+        request values of the RPC should be passed. Only non-None if cardinality
+        is cardinality.Cardinality.STREAM_STREAM and style is
+        style.Service.EVENT.
+    """
+
+
+class MultiMethodImplementation(abc.ABC):
+    """A general type able to service many methods."""
+
+    @abc.abstractmethod
+    def service(self, group, method, response_consumer, context):
+        """Services an RPC.
+
+        Args:
+          group: The group identifier of the RPC.
+          method: The method identifier of the RPC.
+          response_consumer: A stream.Consumer to be called to accept the response
+            values of the RPC.
+          context: a ServicerContext object.
+
+        Returns:
+          A stream.Consumer with which to accept the request values of the RPC. The
+            consumer returned from this method may or may not be invoked to
+            completion: in the case of RPC abortion, RPC Framework will simply stop
+            passing values to this object. Implementations must not assume that this
+            object will be called to completion of the request stream or even called
+            at all.
+
+        Raises:
+          abandonment.Abandoned: May or may not be raised when the RPC has been
+            aborted.
+          NoSuchMethodError: If this MultiMethod does not recognize the given group
+            and name for the RPC and is not able to service the RPC.
+        """
+        raise NotImplementedError()
+
+
+class GenericStub(abc.ABC):
+    """Affords RPC invocation via generic methods."""
+
+    @abc.abstractmethod
+    def blocking_unary_unary(
+        self,
+        group,
+        method,
+        request,
+        timeout,
+        metadata=None,
+        with_call=False,
+        protocol_options=None,
+    ):
+        """Invokes a unary-request-unary-response method.
+
+        This method blocks until either returning the response value of the RPC
+        (in the event of RPC completion) or raising an exception (in the event of
+        RPC abortion).
+
+        Args:
+          group: The group identifier of the RPC.
+          method: The method identifier of the RPC.
+          request: The request value for the RPC.
+          timeout: A duration of time in seconds to allow for the RPC.
+          metadata: A metadata value to be passed to the service-side of the RPC.
+          with_call: Whether or not to include return a Call for the RPC in addition
+            to the response.
+          protocol_options: A value specified by the provider of a Face interface
+            implementation affording custom state and behavior.
+
+        Returns:
+          The response value for the RPC, and a Call for the RPC if with_call was
+            set to True at invocation.
+
+        Raises:
+          AbortionError: Indicating that the RPC was aborted.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def future_unary_unary(
+        self,
+        group,
+        method,
+        request,
+        timeout,
+        metadata=None,
+        protocol_options=None,
+    ):
+        """Invokes a unary-request-unary-response method.
+
+        Args:
+          group: The group identifier of the RPC.
+          method: The method identifier of the RPC.
+          request: The request value for the RPC.
+          timeout: A duration of time in seconds to allow for the RPC.
+          metadata: A metadata value to be passed to the service-side of the RPC.
+          protocol_options: A value specified by the provider of a Face interface
+            implementation affording custom state and behavior.
+
+        Returns:
+          An object that is both a Call for the RPC and a future.Future. In the
+            event of RPC completion, the return Future's result value will be the
+            response value of the RPC. In the event of RPC abortion, the returned
+            Future's exception value will be an AbortionError.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def inline_unary_stream(
+        self,
+        group,
+        method,
+        request,
+        timeout,
+        metadata=None,
+        protocol_options=None,
+    ):
+        """Invokes a unary-request-stream-response method.
+
+        Args:
+          group: The group identifier of the RPC.
+          method: The method identifier of the RPC.
+          request: The request value for the RPC.
+          timeout: A duration of time in seconds to allow for the RPC.
+          metadata: A metadata value to be passed to the service-side of the RPC.
+          protocol_options: A value specified by the provider of a Face interface
+            implementation affording custom state and behavior.
+
+        Returns:
+          An object that is both a Call for the RPC and an iterator of response
+            values. Drawing response values from the returned iterator may raise
+            AbortionError indicating abortion of the RPC.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def blocking_stream_unary(
+        self,
+        group,
+        method,
+        request_iterator,
+        timeout,
+        metadata=None,
+        with_call=False,
+        protocol_options=None,
+    ):
+        """Invokes a stream-request-unary-response method.
+
+        This method blocks until either returning the response value of the RPC
+        (in the event of RPC completion) or raising an exception (in the event of
+        RPC abortion).
+
+        Args:
+          group: The group identifier of the RPC.
+          method: The method identifier of the RPC.
+          request_iterator: An iterator that yields request values for the RPC.
+          timeout: A duration of time in seconds to allow for the RPC.
+          metadata: A metadata value to be passed to the service-side of the RPC.
+          with_call: Whether or not to include return a Call for the RPC in addition
+            to the response.
+          protocol_options: A value specified by the provider of a Face interface
+            implementation affording custom state and behavior.
+
+        Returns:
+          The response value for the RPC, and a Call for the RPC if with_call was
+            set to True at invocation.
+
+        Raises:
+          AbortionError: Indicating that the RPC was aborted.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def future_stream_unary(
+        self,
+        group,
+        method,
+        request_iterator,
+        timeout,
+        metadata=None,
+        protocol_options=None,
+    ):
+        """Invokes a stream-request-unary-response method.
+
+        Args:
+          group: The group identifier of the RPC.
+          method: The method identifier of the RPC.
+          request_iterator: An iterator that yields request values for the RPC.
+          timeout: A duration of time in seconds to allow for the RPC.
+          metadata: A metadata value to be passed to the service-side of the RPC.
+          protocol_options: A value specified by the provider of a Face interface
+            implementation affording custom state and behavior.
+
+        Returns:
+          An object that is both a Call for the RPC and a future.Future. In the
+            event of RPC completion, the return Future's result value will be the
+            response value of the RPC. In the event of RPC abortion, the returned
+            Future's exception value will be an AbortionError.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def inline_stream_stream(
+        self,
+        group,
+        method,
+        request_iterator,
+        timeout,
+        metadata=None,
+        protocol_options=None,
+    ):
+        """Invokes a stream-request-stream-response method.
+
+        Args:
+          group: The group identifier of the RPC.
+          method: The method identifier of the RPC.
+          request_iterator: An iterator that yields request values for the RPC.
+          timeout: A duration of time in seconds to allow for the RPC.
+          metadata: A metadata value to be passed to the service-side of the RPC.
+          protocol_options: A value specified by the provider of a Face interface
+            implementation affording custom state and behavior.
+
+        Returns:
+          An object that is both a Call for the RPC and an iterator of response
+            values. Drawing response values from the returned iterator may raise
+            AbortionError indicating abortion of the RPC.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def event_unary_unary(
+        self,
+        group,
+        method,
+        request,
+        receiver,
+        abortion_callback,
+        timeout,
+        metadata=None,
+        protocol_options=None,
+    ):
+        """Event-driven invocation of a unary-request-unary-response method.
+
+        Args:
+          group: The group identifier of the RPC.
+          method: The method identifier of the RPC.
+          request: The request value for the RPC.
+          receiver: A ResponseReceiver to be passed the response data of the RPC.
+          abortion_callback: A callback to be called and passed an Abortion value
+            in the event of RPC abortion.
+          timeout: A duration of time in seconds to allow for the RPC.
+          metadata: A metadata value to be passed to the service-side of the RPC.
+          protocol_options: A value specified by the provider of a Face interface
+            implementation affording custom state and behavior.
+
+        Returns:
+          A Call for the RPC.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def event_unary_stream(
+        self,
+        group,
+        method,
+        request,
+        receiver,
+        abortion_callback,
+        timeout,
+        metadata=None,
+        protocol_options=None,
+    ):
+        """Event-driven invocation of a unary-request-stream-response method.
+
+        Args:
+          group: The group identifier of the RPC.
+          method: The method identifier of the RPC.
+          request: The request value for the RPC.
+          receiver: A ResponseReceiver to be passed the response data of the RPC.
+          abortion_callback: A callback to be called and passed an Abortion value
+            in the event of RPC abortion.
+          timeout: A duration of time in seconds to allow for the RPC.
+          metadata: A metadata value to be passed to the service-side of the RPC.
+          protocol_options: A value specified by the provider of a Face interface
+            implementation affording custom state and behavior.
+
+        Returns:
+          A Call for the RPC.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def event_stream_unary(
+        self,
+        group,
+        method,
+        receiver,
+        abortion_callback,
+        timeout,
+        metadata=None,
+        protocol_options=None,
+    ):
+        """Event-driven invocation of a unary-request-unary-response method.
+
+        Args:
+          group: The group identifier of the RPC.
+          method: The method identifier of the RPC.
+          receiver: A ResponseReceiver to be passed the response data of the RPC.
+          abortion_callback: A callback to be called and passed an Abortion value
+            in the event of RPC abortion.
+          timeout: A duration of time in seconds to allow for the RPC.
+          metadata: A metadata value to be passed to the service-side of the RPC.
+          protocol_options: A value specified by the provider of a Face interface
+            implementation affording custom state and behavior.
+
+        Returns:
+          A pair of a Call object for the RPC and a stream.Consumer to which the
+            request values of the RPC should be passed.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def event_stream_stream(
+        self,
+        group,
+        method,
+        receiver,
+        abortion_callback,
+        timeout,
+        metadata=None,
+        protocol_options=None,
+    ):
+        """Event-driven invocation of a unary-request-stream-response method.
+
+        Args:
+          group: The group identifier of the RPC.
+          method: The method identifier of the RPC.
+          receiver: A ResponseReceiver to be passed the response data of the RPC.
+          abortion_callback: A callback to be called and passed an Abortion value
+            in the event of RPC abortion.
+          timeout: A duration of time in seconds to allow for the RPC.
+          metadata: A metadata value to be passed to the service-side of the RPC.
+          protocol_options: A value specified by the provider of a Face interface
+            implementation affording custom state and behavior.
+
+        Returns:
+          A pair of a Call object for the RPC and a stream.Consumer to which the
+            request values of the RPC should be passed.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def unary_unary(self, group, method):
+        """Creates a UnaryUnaryMultiCallable for a unary-unary method.
+
+        Args:
+          group: The group identifier of the RPC.
+          method: The method identifier of the RPC.
+
+        Returns:
+          A UnaryUnaryMultiCallable value for the named unary-unary method.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def unary_stream(self, group, method):
+        """Creates a UnaryStreamMultiCallable for a unary-stream method.
+
+        Args:
+          group: The group identifier of the RPC.
+          method: The method identifier of the RPC.
+
+        Returns:
+          A UnaryStreamMultiCallable value for the name unary-stream method.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def stream_unary(self, group, method):
+        """Creates a StreamUnaryMultiCallable for a stream-unary method.
+
+        Args:
+          group: The group identifier of the RPC.
+          method: The method identifier of the RPC.
+
+        Returns:
+          A StreamUnaryMultiCallable value for the named stream-unary method.
+        """
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def stream_stream(self, group, method):
+        """Creates a StreamStreamMultiCallable for a stream-stream method.
+
+        Args:
+          group: The group identifier of the RPC.
+          method: The method identifier of the RPC.
+
+        Returns:
+          A StreamStreamMultiCallable value for the named stream-stream method.
+        """
+        raise NotImplementedError()
+
+
+class DynamicStub(abc.ABC):
+    """Affords RPC invocation via attributes corresponding to afforded methods.
+
+    Instances of this type may be scoped to a single group so that attribute
+    access is unambiguous.
+
+    Instances of this type respond to attribute access as follows: if the
+    requested attribute is the name of a unary-unary method, the value of the
+    attribute will be a UnaryUnaryMultiCallable with which to invoke an RPC; if
+    the requested attribute is the name of a unary-stream method, the value of the
+    attribute will be a UnaryStreamMultiCallable with which to invoke an RPC; if
+    the requested attribute is the name of a stream-unary method, the value of the
+    attribute will be a StreamUnaryMultiCallable with which to invoke an RPC; and
+    if the requested attribute is the name of a stream-stream method, the value of
+    the attribute will be a StreamStreamMultiCallable with which to invoke an RPC.
+    """
diff --git a/.venv/lib/python3.12/site-packages/grpc/framework/interfaces/face/utilities.py b/.venv/lib/python3.12/site-packages/grpc/framework/interfaces/face/utilities.py
new file mode 100644
index 00000000..b02ea530
--- /dev/null
+++ b/.venv/lib/python3.12/site-packages/grpc/framework/interfaces/face/utilities.py
@@ -0,0 +1,245 @@
+# Copyright 2015 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Utilities for RPC Framework's Face interface."""
+
+import collections
+
+# stream is referenced from specification in this module.
+from grpc.framework.common import cardinality
+from grpc.framework.common import style
+from grpc.framework.foundation import stream  # pylint: disable=unused-import
+from grpc.framework.interfaces.face import face
+
+
+class _MethodImplementation(
+    face.MethodImplementation,
+    collections.namedtuple(
+        "_MethodImplementation",
+        [
+            "cardinality",
+            "style",
+            "unary_unary_inline",
+            "unary_stream_inline",
+            "stream_unary_inline",
+            "stream_stream_inline",
+            "unary_unary_event",
+            "unary_stream_event",
+            "stream_unary_event",
+            "stream_stream_event",
+        ],
+    ),
+):
+    pass
+
+
+def unary_unary_inline(behavior):
+    """Creates an face.MethodImplementation for the given behavior.
+
+    Args:
+      behavior: The implementation of a unary-unary RPC method as a callable value
+        that takes a request value and an face.ServicerContext object and
+        returns a response value.
+
+    Returns:
+      An face.MethodImplementation derived from the given behavior.
+    """
+    return _MethodImplementation(
+        cardinality.Cardinality.UNARY_UNARY,
+        style.Service.INLINE,
+        behavior,
+        None,
+        None,
+        None,
+        None,
+        None,
+        None,
+        None,
+    )
+
+
+def unary_stream_inline(behavior):
+    """Creates an face.MethodImplementation for the given behavior.
+
+    Args:
+      behavior: The implementation of a unary-stream RPC method as a callable
+        value that takes a request value and an face.ServicerContext object and
+        returns an iterator of response values.
+
+    Returns:
+      An face.MethodImplementation derived from the given behavior.
+    """
+    return _MethodImplementation(
+        cardinality.Cardinality.UNARY_STREAM,
+        style.Service.INLINE,
+        None,
+        behavior,
+        None,
+        None,
+        None,
+        None,
+        None,
+        None,
+    )
+
+
+def stream_unary_inline(behavior):
+    """Creates an face.MethodImplementation for the given behavior.
+
+    Args:
+      behavior: The implementation of a stream-unary RPC method as a callable
+        value that takes an iterator of request values and an
+        face.ServicerContext object and returns a response value.
+
+    Returns:
+      An face.MethodImplementation derived from the given behavior.
+    """
+    return _MethodImplementation(
+        cardinality.Cardinality.STREAM_UNARY,
+        style.Service.INLINE,
+        None,
+        None,
+        behavior,
+        None,
+        None,
+        None,
+        None,
+        None,
+    )
+
+
+def stream_stream_inline(behavior):
+    """Creates an face.MethodImplementation for the given behavior.
+
+    Args:
+      behavior: The implementation of a stream-stream RPC method as a callable
+        value that takes an iterator of request values and an
+        face.ServicerContext object and returns an iterator of response values.
+
+    Returns:
+      An face.MethodImplementation derived from the given behavior.
+    """
+    return _MethodImplementation(
+        cardinality.Cardinality.STREAM_STREAM,
+        style.Service.INLINE,
+        None,
+        None,
+        None,
+        behavior,
+        None,
+        None,
+        None,
+        None,
+    )
+
+
+def unary_unary_event(behavior):
+    """Creates an face.MethodImplementation for the given behavior.
+
+    Args:
+      behavior: The implementation of a unary-unary RPC method as a callable
+        value that takes a request value, a response callback to which to pass
+        the response value of the RPC, and an face.ServicerContext.
+
+    Returns:
+      An face.MethodImplementation derived from the given behavior.
+    """
+    return _MethodImplementation(
+        cardinality.Cardinality.UNARY_UNARY,
+        style.Service.EVENT,
+        None,
+        None,
+        None,
+        None,
+        behavior,
+        None,
+        None,
+        None,
+    )
+
+
+def unary_stream_event(behavior):
+    """Creates an face.MethodImplementation for the given behavior.
+
+    Args:
+      behavior: The implementation of a unary-stream RPC method as a callable
+        value that takes a request value, a stream.Consumer to which to pass the
+        response values of the RPC, and an face.ServicerContext.
+
+    Returns:
+      An face.MethodImplementation derived from the given behavior.
+    """
+    return _MethodImplementation(
+        cardinality.Cardinality.UNARY_STREAM,
+        style.Service.EVENT,
+        None,
+        None,
+        None,
+        None,
+        None,
+        behavior,
+        None,
+        None,
+    )
+
+
+def stream_unary_event(behavior):
+    """Creates an face.MethodImplementation for the given behavior.
+
+    Args:
+      behavior: The implementation of a stream-unary RPC method as a callable
+        value that takes a response callback to which to pass the response value
+        of the RPC and an face.ServicerContext and returns a stream.Consumer to
+        which the request values of the RPC should be passed.
+
+    Returns:
+      An face.MethodImplementation derived from the given behavior.
+    """
+    return _MethodImplementation(
+        cardinality.Cardinality.STREAM_UNARY,
+        style.Service.EVENT,
+        None,
+        None,
+        None,
+        None,
+        None,
+        None,
+        behavior,
+        None,
+    )
+
+
+def stream_stream_event(behavior):
+    """Creates an face.MethodImplementation for the given behavior.
+
+    Args:
+      behavior: The implementation of a stream-stream RPC method as a callable
+        value that takes a stream.Consumer to which to pass the response values
+        of the RPC and an face.ServicerContext and returns a stream.Consumer to
+        which the request values of the RPC should be passed.
+
+    Returns:
+      An face.MethodImplementation derived from the given behavior.
+    """
+    return _MethodImplementation(
+        cardinality.Cardinality.STREAM_STREAM,
+        style.Service.EVENT,
+        None,
+        None,
+        None,
+        None,
+        None,
+        None,
+        None,
+        behavior,
+    )