| Interface | IContact | Interface that all contact backends must implement |
| Interface | IMessage | Interface that all message backends must implement |
| Interface | ICollaborator | ICollaborator aids AuthStateMachine providing necessary PIN/PUK/Whatever |
| Interface | ICollaboratorFactory | No interface docstring; 1/1 methods documented |
| Interface | IDialer | No interface docstring; 5/5 methods documented |
| Interface | IWaderPlugin | Base interface for all Wader plugins |
| Interface | IDevicePlugin | Interface that all device plugins should implement |
| Interface | IDBusDevicePlugin | No interface docstring; 1/1 attributes documented |
| Interface | IRemoteDevicePlugin | Interface that all remote device plugins should implent |
| Interface | IOSPlugin | No interface docstring; 4/4 attributes, 8/8 methods documented |
| Interface | INotificationPlugin | No interface docstring; 1/1 attributes, 1/1 methods documented |
| Interface | INotificationListener | No interface docstring; 1/1 methods documented |