Merge pull request #1307 from planetary-social/fix-crash-in-pagedrela…

…ysubscription

Probably fix a crash in PagedRelaySubscription

Nos/Service/Relay/PagedRelaySubscription.swift

@@ -92,22 +92,29 @@ class PagedRelaySubscription {
                     to: relayAddress
                 )
 
-                pagedEventSubscription.events.sink { [weak self] jsonEvent in
-                    self?.track(event: jsonEvent, from: relayAddress)
-                }
-                .store(in: &cancellables)
+                pagedEventSubscription.events
+                    .sink { [weak self] jsonEvent in
+                        Task {
+                            await self?.track(event: jsonEvent, from: relayAddress)
+                        }
+                    }
+                    .store(in: &cancellables)
 
                 pagedSubscriptionIDs.insert(pagedEventSubscription.id)
             }
         }
     }
 
-    func track(event: JSONEvent, from relay: URL) {
-        if let oldestSeen = oldestEventByRelay[relay],
+    func updateOldestEvent(for relay: URL, to date: Date) {
+        oldestEventByRelay[relay] = date
+    }
+
+    nonisolated func track(event: JSONEvent, from relay: URL) async {
+        if let oldestSeen = await oldestEventByRelay[relay],
             event.createdDate < oldestSeen {
-            oldestEventByRelay[relay] = event.createdDate
+            await updateOldestEvent(for: relay, to: event.createdDate)
         } else {
-            oldestEventByRelay[relay] = event.createdDate
+            await updateOldestEvent(for: relay, to: event.createdDate)
         }
     }
 }