fix: add missing code

packages/keyring-internal-snap-client/src/KeyringInternalSnapClientMessenger.ts

@@ -0,0 +1,14 @@
+import type { Messenger } from '@metamask/messenger';
+import type { HandleSnapRequest } from '@metamask/snaps-controllers';
+
+// We only need to dispatch Snap request to the Snaps controller for now.
+type AllowedActions = HandleSnapRequest;
+
+/**
+ * A restricted-`Messenger` used by `KeyringInternalSnapClient` to dispatch
+ * internal Snap requests.
+ */
+export type KeyringInternalSnapClientMessenger = Messenger<
+  'KeyringInternalSnapClient',
+  AllowedActions
+>;

packages/keyring-internal-snap-client/src/SnapControllerMessengerSender.ts

@@ -1,3 +1,9 @@
+import type { Sender } from '@metamask/keyring-snap-client';
+import type { Json, JsonRpcRequest, SnapId } from '@metamask/snaps-sdk';
+import type { HandlerType } from '@metamask/snaps-utils';
+
+import type { KeyringInternalSnapClientMessenger } from './KeyringInternalSnapClientMessenger';
+
 /**
  * Implementation of the `Sender` interface that can be used to send requests
  * to a Snap through a `Messenger`.