From 98e9694b358a036a75ebe9eeaa090043ea905d8a Mon Sep 17 00:00:00 2001
From: Greyson Parrelli <greyson@signal.org>
Date: Thu, 11 Sep 2025 10:44:31 -0400
Subject: [PATCH] Support backup4 and backup5 capabilities for linked devices.

---
 .../securesms/linkdevice/LinkDeviceViewModel.kt      | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

diff --git a/app/src/main/java/org/thoughtcrime/securesms/linkdevice/LinkDeviceViewModel.kt b/app/src/main/java/org/thoughtcrime/securesms/linkdevice/LinkDeviceViewModel.kt
index f2a43a5813..8cbe37c930 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/linkdevice/LinkDeviceViewModel.kt
+++ b/app/src/main/java/org/thoughtcrime/securesms/linkdevice/LinkDeviceViewModel.kt
@@ -22,7 +22,6 @@ import org.thoughtcrime.securesms.linkdevice.LinkDeviceSettingsState.OneTimeEven
 import org.thoughtcrime.securesms.linkdevice.LinkDeviceSettingsState.QrCodeState
 import org.thoughtcrime.securesms.logsubmit.SubmitDebugLogRepository
 import org.thoughtcrime.securesms.notifications.NotificationIds
-import org.thoughtcrime.securesms.util.RemoteConfig
 import org.thoughtcrime.securesms.util.ServiceUtil
 import org.thoughtcrime.securesms.util.Util
 import org.whispersystems.signalservice.api.backup.MessageBackupKey
@@ -424,15 +423,8 @@ class LinkDeviceViewModel : ViewModel() {
   }
 
   private fun Uri.supportsLinkAndSync(): Boolean {
-    return if (RemoteConfig.internalUser) {
-      this.getQueryParameter("capabilities")?.split(",")?.contains("backup") == true ||
-        this.getQueryParameter("capabilities")?.split(",")?.contains("backup2") == true ||
-        this.getQueryParameter("capabilities")?.split(",")?.contains("backup3") == true ||
-        this.getQueryParameter("capabilities")?.split(",")?.contains("backup4") == true
-    } else {
-      this.getQueryParameter("capabilities")?.split(",")?.contains("backup3") == true ||
-        this.getQueryParameter("capabilities")?.split(",")?.contains("backup4") == true
-    }
+    val capabilities = this.getQueryParameter("capabilities")?.split(",")?.toSet() ?: emptySet()
+    return "backup4" in capabilities || "backup5" in capabilities
   }
 
   fun onSyncErrorIgnored() = viewModelScope.launch(Dispatchers.IO) {