Unity: Receive Firebase Short Dynamic Link in DynamicLinkReceived callback event - firebase

Question

I would like to use Firebase Dynamic Links for Unity (Android/iOS) so users can invite friends and be rewarded with.
Each user gets a different Short Dynamic Link in the form of https://test.page.link/abcd
The user can share this Short DynamicLink with friends.
When the invited friend comes into the app, this callback is called.
private void OnDynamicLink(object sender, EventArgs args) {
var dynamicLinkEventArgs = args as ReceivedDynamicLinkEventArgs;
Debug.LogFormat("Received dynamic link {0}",
dynamicLinkEventArgs.ReceivedDynamicLink.Url.OriginalString);
}
Unfortunately, I only get back the base link that was necessary to create the short dynamic link.
Received dynamic link https://www.example.com/referral?xxxxxxxxxx
I get an additional native output in my iOS app:
IOSNative::Native->Unity callback data:
{"m_EventName":"continueUserActivity","m_Data":"https://test.page.link/?link=https://www.example.com/referral?xxxxxxxxxx&apn=de.test.testapp&isi=123456789&ibi=de.test.testapp&cid=1579347010984123886&_osl=https://test.page.link/abcd&_fpb=AB6327276CFGHT==&_cpt=cpit&_iumenbl=1&_iumchkactval=1&_plt=2076&_uit=2692&_cpb=1"}
2020-01-14 15:30:20.455009+0100 ambassador[315:8406]
IOSNative::Native->Unity callback data:
{"m_EventName":"applicationDidBecomeActive","m_Data":""}
Now my question is how do I get the generated short dynamic link that I have shared with a friend in OnDynamicLink callback( https://test.page.link/abcd)?
I need the value behind the parameter "&_osl" as seen in additional native output. But I only get the Base Url back in Unity (https://www.example.com/referral?xxxxxxxxxx).

Answer 1

My solution at the end was to shorten the BaseLink with the help of DynamicLinks.GetShortLinkAsync.
//unescape url
baseLink = UnityEngine.Networking.UnityWebRequest.UnEscapeURL(baseLink);
var components = new DynamicLinkComponents(
// The base Link.
new Uri(baseLink),
// The dynamic link URI prefix.
domainUriPrefix) {
IOSParameters = new IOSParameters(PackageName) {
AppStoreId = "XXXXXXXXX"
},
AndroidParameters = new AndroidParameters(PackeName)
};
string inviteLink = string.Empty;
await DynamicLinks.GetShortLinkAsync(components, options).ContinueWith((task) => {
if (task.IsCanceled) {
Debug.LogError("GetShortLinkAsync was canceled.");
return;
}
if (task.IsFaulted) {
Debug.LogError("GetShortLinkAsync encountered an error: " + task.Exception);
return;
}
// Short Link has been created.
inviteLink = task.Result.Url.ToString();
});