TransportCondition: "Unknown" | "OK" | "GenericFailure" | "AppInBackground" | "MDNSFailure" | "TCPListenFailure" | "NoBLECentralPermission" | "NoBLEPeripheralPermission" | "CannotEstablishConnection" | "BLEDisabled" | "NoBLEHardware" | "WiFiDisabled" | "TemporarilyUnavailable"

Types of connections that can be established between two peers.