From 6dfdbeb7bbd2738cb323f00410258861f61d43c7 Mon Sep 17 00:00:00 2001
From: Jon Chambers <jon@signal.org>
Date: Wed, 19 Apr 2023 16:22:01 -0400
Subject: [PATCH] Check for no-op APNs token changes

---
 .../textsecuregcm/controllers/AccountController.java  | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/service/src/main/java/org/whispersystems/textsecuregcm/controllers/AccountController.java b/service/src/main/java/org/whispersystems/textsecuregcm/controllers/AccountController.java
index b526b9300..55ad9aed8 100644
--- a/service/src/main/java/org/whispersystems/textsecuregcm/controllers/AccountController.java
+++ b/service/src/main/java/org/whispersystems/textsecuregcm/controllers/AccountController.java
@@ -573,8 +573,15 @@ public class AccountController {
   @ChangesDeviceEnabledState
   public void setApnRegistrationId(@Auth DisabledPermittedAuthenticatedAccount disabledPermittedAuth,
       @NotNull @Valid ApnRegistrationId registrationId) {
-    Account account = disabledPermittedAuth.getAccount();
-    Device device = disabledPermittedAuth.getAuthenticatedDevice();
+
+    final Account account = disabledPermittedAuth.getAccount();
+    final Device device = disabledPermittedAuth.getAuthenticatedDevice();
+
+    if (Objects.equals(device.getApnId(), registrationId.apnRegistrationId()) &&
+        Objects.equals(device.getVoipApnId(), registrationId.voipRegistrationId())) {
+
+      return;
+    }
 
     accounts.updateDevice(account, device.getId(), d -> {
       d.setApnId(registrationId.apnRegistrationId());