Understand Dynamic Links Firebase - firebase

Question

I would like to understand better Firebase Dynamic Links because i am very new to this subject.
What i would like to know :
FirebaseDynamicLinks.instance.getInitialLink() is supposed to return "only" the last dynamic link created with the "initial" url (before it was shorten) ?
Or why FirebaseDynamicLinks.instance.getInitialLink() doesn't take a String url as a parameter ?
FirebaseDynamicLinks.instance.getDynamicLink(String url) doesn't read custom parameters if the url was shorten, so how can we retrieve custom parameters from a shorten link ?
My use case is quite simple, i am trying to share an object through messages in my application, so i want to save the dynamic link in my database and be able to read it to run a query according to specific parameters.

Answer 1

FirebaseDynamicLinks.instance.getInitialLink() returns the link that opened the app and if the app was not opened by a dynamic link, then it will return null.
Future<PendingDynamicLinkData?> getInitialLink()
Attempts to retrieve the dynamic link which launched the app.
This method always returns a Future. That Future completes to null if
there is no pending dynamic link or any call to this method after the
the first attempt.
https://pub.dev/documentation/firebase_dynamic_links/latest/firebase_dynamic_links/FirebaseDynamicLinks/getInitialLink.html
FirebaseDynamicLinks.instance.getInitialLink() does not accept a string url as parameter because it is just meant to return the link that opened the app.
Looks like there's no straightforward answer to getting the query parameters back from a shortened link. Take a look at this discussion to see if any of the workarounds fit your use case.