How can I uniquely identify a chromecast chrome sender?

Question

When casting a tab from chrome, the receiver registers a new sender with an id like this:

18:client-69832

However, when the chrome tab is reloaded, a call to castReceiverManager.getSenders() now contains two entries and continues to increase every time the page is reloaded

castReceiverManager.getSenders() -> 18:client-69832
RELOAD
castReceiverManager.getSenders() -> 18:client-69832, 18:client-78542
RELOAD
castReceiverManager.getSenders() -> 18:client-69832, 18:client-78542, 18:client-84557
etc...

The first part 18:client seems to remain consistent across reloads. Can we rely on this to uniquely identify the device? If not, how can we uniquely identify the device?

Answer 1

When you say unique, what is the scope that you have in mind If you are looking for something that persists between sessions, then that number s not unique. If you want something unique across sessions, one approach is to have each sender create such uid and communicate that to the receiver (if receiver needs to know).