Add versionedExpirationTimer capability

service/src/main/java/org/whispersystems/textsecuregcm/controllers/DeviceController.java

@@ -392,7 +392,10 @@ public class DeviceController {
   }
 
   private static boolean isCapabilityDowngrade(Account account, DeviceCapabilities capabilities) {
-    return account.isDeleteSyncSupported() && !capabilities.deleteSync();
+    boolean isDowngrade = false;
+    isDowngrade |= account.isDeleteSyncSupported() && !capabilities.deleteSync();
+    isDowngrade |= account.isVersionedExpirationTimerSupported() && !capabilities.versionedExpirationTimer();
+    return isDowngrade;
   }
 
   private static String getUsedTokenKey(final String token) {

service/src/main/java/org/whispersystems/textsecuregcm/entities/UserCapabilities.java

@@ -8,11 +8,13 @@ package org.whispersystems.textsecuregcm.entities;
 import org.whispersystems.textsecuregcm.storage.Account;
 
 public record UserCapabilities(
-    // TODO: Remove the paymentActivation capability entirely sometime soon after 2024-06-30
+    // TODO: Remove the paymentActivation capability entirely sometime soon after 2024-10-07
     boolean paymentActivation,
-    boolean deleteSync) {
+    boolean deleteSync,
+    boolean versionedExpirationTimer) {
 
   public static UserCapabilities createForAccount(final Account account) {
-    return new UserCapabilities(true, account.isDeleteSyncSupported());
+    return new UserCapabilities(true, account.isDeleteSyncSupported(),
+        account.isVersionedExpirationTimerSupported());
   }
 }

service/src/main/java/org/whispersystems/textsecuregcm/grpc/DevicesGrpcService.java

@@ -198,7 +198,8 @@ public class DevicesGrpcService extends ReactorDevicesGrpc.DevicesImplBase {
                     request.getStorage(),
                     request.getTransfer(),
                     request.getPaymentActivation(),
-                    request.getDeleteSync())))))
+                    request.getDeleteSync(),
+                    request.getVersionedExpirationTimer())))))
         .thenReturn(SetCapabilitiesResponse.newBuilder().build());
   }
 }

service/src/main/java/org/whispersystems/textsecuregcm/grpc/ProfileGrpcHelper.java

@@ -84,6 +84,7 @@ public class ProfileGrpcHelper {
     return UserCapabilities.newBuilder()
         .setPaymentActivation(capabilities.paymentActivation())
         .setDeleteSync(capabilities.deleteSync())
+        .setVersionedExpirationTimer(capabilities.versionedExpirationTimer())
         .build();
   }
 

service/src/main/java/org/whispersystems/textsecuregcm/storage/Account.java

@@ -296,6 +296,10 @@ public class Account {
     return allDevicesHaveCapability(DeviceCapabilities::deleteSync);
   }
 
+  public boolean isVersionedExpirationTimerSupported() {
+    return allDevicesHaveCapability(DeviceCapabilities::versionedExpirationTimer);
+  }
+
   private boolean allDevicesHaveCapability(final Predicate<DeviceCapabilities> predicate) {
     requireNotStale();
 

service/src/main/java/org/whispersystems/textsecuregcm/storage/Device.java

@@ -232,6 +232,7 @@ public class Device {
     return this.userAgent;
   }
 
-  public record DeviceCapabilities(boolean storage, boolean transfer, boolean paymentActivation, boolean deleteSync) {
+  public record DeviceCapabilities(boolean storage, boolean transfer, boolean paymentActivation, boolean deleteSync,
+                                   boolean versionedExpirationTimer) {
   }
 }