[Bug] Android IL2CPP build fails: UnityLinker can’t resolve BouncyCastle.Cryptography with v1.2.9

[MVelascoWS]

Bug summary
After install v1.2.9, Android IL2CPP builds consistently fail during the Unity CIL Linker step with an assembly resolution error for BouncyCastle.Cryptography (2.x). Unity can’t find that assembly even when I add the DLL manually.

Error log (Editor.log excerpt)
Building Library\Bee\artifacts\Android\ManagedStripped failed with output: D:\Unity\Hub\Editor\6000.1.8f1\Editor\Data\il2cpp\build\deploy\UnityLinker.exe @Library\Bee\artifacts\rsp\16162982357633868796.rsp Fatal error in Unity CIL Linker Mono.Cecil.AssemblyResolutionException: Failed to resolve assembly: 'BouncyCastle.Cryptography, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null' at Unity.IL2CPP.Common.MissingMethodStubber.GetTypeModule(...) at Unity.Linker.Steps.AddUnresolvedStubsStep.MarkAssemblyOfType(...) at Unity.Linker.Steps.Marking.UnresolvedStubMarking.HandleUnresolvedType(...) ... UnityEditor.EditorApplication:Internal_CallDelayFunctions ()

To Reproduce

1. Create a new Unity project (Unity 6000.1.8f1).
2. Add Solana.Unity-SDK v1.2.9 via Package Manager (Git URL).
3. Switch to Android, set IL2CPP / ARM64.
4. Build → Linker fails with Failed to resolve assembly: 'BouncyCastle.Cryptography, Version=2.0.0.0'.

Expected behavior
Android IL2CPP build succeeds (the SDK resolves its crypto dependency without manual intervention).

Unity versions tested
-6000.1.8f1 (primary)
-6000.2.7f2 (also repros)

Platform / Build settings:
-Target: Android
-Scripting Backend: IL2CPP
-Architecture: ARM64
-Managed Stripping Level: (tried Low/Medium)
-OS: Windows

Additional context
Even with BouncyCastle.Cryptography.dll (2.x, netstandard2.0) present and enabled for Android, the .rsp used by UnityLinker appears to omit the 2.x DLL (linker still reports it missing)

[MVelascoWS]

The version 1.2.10 solves the problem with the BouncyCastle.Cryptography dll. But now I have an error at building time with duplicated classes:

FAILURE: Build failed with an exception.
What went wrong:
Execution failed for task :launcher:checkReleaseDuplicateClasses.

A failure occurred while executing com.android.build.gradle.internal.tasks.CheckDuplicatesRunnable
Duplicate class android.support.v4.app.RemoteActionCompatParcelizer found in modules androidx.core.core-1.8.0.aar -> jetified-androidx.core.core-1.8.0-runtime (:androidx.core.core-1.8.0:) and core-1.9.0.aar -> core-1.9.0-runtime (androidx.core:core:1.9.0)
Duplicate class android.support.v4.graphics.drawable.IconCompatParcelizer found in modules androidx.core.core-1.8.0.aar -> jetified-androidx.core.core-1.8.0-runtime (:androidx.core.core-1.8.0:) and core-1.9.0.aar -> core-1.9.0-runtime (androidx.core:core:1.9.0)
Duplicate class android.support.v4.os.ResultReceiver found in modules androidx.core.core-1.8.0.aar -> jetified-androidx.core.core-1.8.0-runtime (:androidx.core.core-1.8.0:) and core-1.9.0.aar -> core-1.9.0-runtime (androidx.core:core:1.9.0)
Duplicate class android.support.v4.os.ResultReceiver$1 found in modules androidx.core.core-1.8.0.aar -> jetified-androidx.core.core-1.8.0-runtime (:androidx.core.core-1.8.0:) and core-1.9.0.aar -> core-1.9.0-runtime (androidx.core:core:1.9.0)
Duplicate class android.support.v4.os.ResultReceiver$MyResultReceiver found in modules androidx.core.core-1.8.0.aar -> jetified-androidx.core.core-1.8.0-runtime (:androidx.core.core-1.8.0:) and core-1.9.0.aar -> core-1.9.0-runtime (androidx.core:core:1.9.0)
Duplicate class android.support.v4.os.ResultReceiver$MyRunnable found in modules androidx.core.core-1.8.0.aar -> jetified-androidx.core.core-1.8.0-runtime (:androidx.core.core-1.8.0:) and core-1.9.0.aar -> core-1.9.0-runtime (androidx.core:core:1.9.0)
Duplicate class androidx.arch.core.internal.FastSafeIterableMap found in modules androidx.arch.core.core-common-2.2.0.jar -> jetified-androidx.arch.core.core-common-2.2.0 (androidx.arch.core.core-common-2.2.0.jar) and core-common-2.1.0.jar -> core-common-2.1.0 (androidx.arch.core:core-common:2.1.0)
Duplicate class androidx.arch.core.internal.SafeIterableMap found in modules androidx.arch.core.core-common-2.2.0.jar -> jetified-androidx.arch.core.core-common-2.2.0 (androidx.arch.core.core-common-2.2.0.jar) and core-common-2.1.0.jar -> core-common-2.1.0 (androidx.arch.core:core-common:2.1.0)
Duplicate class androidx.arch.core.internal.SafeIterableMap$AscendingIterator found in modules androidx.arch.core.core-common-2.2.0.jar -> jetified-androidx.arch.core.core-common-2.2.0 (androidx.arch.core.core-common-2.2.0.jar) and core-common-2.1.0.jar -> core-common-2.1.0 (androidx.arch.core:core-common:2.1.0)
Duplicate class androidx.arch.core.internal.SafeIterableMap$DescendingIterator found in modules androidx.arch.core.core-common-2.2.0.jar -> jetified-androidx.arch.core.core-common-2.2.0 (androidx.arch.core.core-common-2.2.0.jar) and core-common-2.1.0.jar -> core-common-2.1.0 (androidx.arch.core:core-common:2.1.0)
Duplicate class androidx.arch.core.internal.SafeIterableMap$Entry found in modules androidx.arch.core.core-common-2.2.0.jar -> jetified-androidx.arch.core.core-common-2.2.0 (androidx.arch.core.core-common-2.2.0.jar) and core-common-2.1.0.jar -> core-common-2.1.0 (androidx.arch.core:core-common:2.1.0)
Duplicate class androidx.arch.core.internal.SafeIterableMap$IteratorWithAdditions found in modules androidx.arch.core.core-common-2.2.0.jar -> jetified-androidx.arch.core.core-common-2.2.0 (androidx.arch.core.core-common-2.2.0.jar) and core-common-2.1.0.jar -> core-common-2.1.0 (androidx.arch.core:core-common:2.1.0)
Duplicate class androidx.arch.core.internal.SafeIterableMap$ListIterator found in modules androidx.arch.core.core-common-2.2.0.jar -> jetified-androidx.arch.core.core-common-2.2.0 (androidx.arch.core.core-common-2.2.0.jar) and core-common-2.1.0.jar -> core-common-2.1.0 (androidx.arch.core:core-common:2.1.0)
Duplicate class androidx.arch.core.internal.SafeIterableMap$SupportRemove found in modules androidx.arch.core.core-common-2.2.0.jar -> jetified-androidx.arch.core.core-common-2.2.0 (androidx.arch.core.core-common-2.2.0.jar) and core-common-2.1.0.jar -> core-common-2.1.0 (androidx.arch.core:core-common:2.1.0)
Duplicate class androidx.arch.core.util.Function found in modules androidx.arch.core.core-common-2.2.0.jar -> jetified-androidx.arch.core.core-common-2.2.0 (androidx.arch.core.core-common-2.2.0.jar) and core-common-2.1.0.jar -> core-common-2.1.0 (androidx.arch.core:core-common:2.1.0)
Duplicate class androidx.collection.ArrayMap found in modules androidx.collection.collection-1.2.0.jar -> jetified-androidx.collection.collection-1.2.0 (androidx.collection.collection-1.2.0.jar) and collection-1.1.0.jar -> collection-1.1.0 (androidx.collection:collection:1.1.0)
Duplicate class androidx.collection.ArraySet found in modules androidx.collection.collection-1.2.0.jar -> jetified-androidx.collection.collection-1.2.0 (androidx.collection.collection-1.2.0.jar) and collection-1.1.0.jar -> collection-1.1.0 (androidx.collection:collection:1.1.0)
Duplicate class androidx.collection.CircularArray found in modules androidx.collection.collection-1.2.0.jar -> jetified-androidx.collection.collection-1.2.0 (androidx.collection.collection-1.2.0.jar) and collection-1.1.0.jar -> collection-1.1.0 (androidx.collection:collection:1.1.0)
Duplicate class androidx.collection.CircularIntArray found in modules androidx.collection.collection-1.2.0.jar -> jetified-androidx.collection.collection-1.2.0 (androidx.collection.collection-1.2.0.jar) and collection-1.1.0.jar -> collection-1.1.0 (androidx.collection:collection:1.1.0)
Duplicate class androidx.collection.ContainerHelpers found in modules androidx.collection.collection-1.2.0.jar -> jetified-androidx.collection.collection-1.2.0 (androidx.collection.collection-1.2.0.jar) and collection-1.1.0.jar -> collection-1.1.0 (androidx.collection:collection:1.1.0)
Duplicate class androidx.collection.LongSparseArray found in modules androidx.collection.collection-1.2.0.jar -> jetified-androidx.collection.collection-1.2.0 (androidx.collection.collection-1.2.0.jar) and collection-1.1.0.jar -> collection-1.1.0 (androidx.collection:collection:1.1.0)
Duplicate class androidx.collection.LruCache found in modules androidx.collection.collection-1.2.0.jar -> jetified-androidx.collection.collection-1.2.0 (androidx.collection.collection-1.2.0.jar) and collection-1.1.0.jar -> collection-1.1.0 (androidx.collection:collection:1.1.0)
Duplicate class androidx.collection.SimpleArrayMap found in modules androidx.collection.collection-1.2.0.jar -> jetified-androidx.collection.collection-1.2.0 (androidx.collection.collection-1.2.0.jar) and collection-1.1.0.jar -> collection-1.1.0 (androidx.collection:collection:1.1.0)
Duplicate class androidx.collection.SparseArrayCompat found in modules androidx.collection.collection-1.2.0.jar -> jetified-androidx.collection.collection-1.2.0 (androidx.collection.collection-1.2.0.jar) and collection-1.1.0.jar -> collection-1.1.0 (androidx.collection:collection:1.1.0)
Duplicate class androidx.concurrent.futures.AbstractResolvableFuture found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.AbstractResolvableFuture$1 found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.AbstractResolvableFuture$AtomicHelper found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.AbstractResolvableFuture$Cancellation found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.AbstractResolvableFuture$Failure found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.AbstractResolvableFuture$Failure$1 found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.AbstractResolvableFuture$Listener found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.AbstractResolvableFuture$SafeAtomicHelper found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.AbstractResolvableFuture$SetFuture found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.AbstractResolvableFuture$SynchronizedHelper found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.AbstractResolvableFuture$Waiter found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.CallbackToFutureAdapter found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.CallbackToFutureAdapter$Completer found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.CallbackToFutureAdapter$FutureGarbageCollectedException found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.CallbackToFutureAdapter$Resolver found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.CallbackToFutureAdapter$SafeFuture found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.CallbackToFutureAdapter$SafeFuture$1 found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.DirectExecutor found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.ResolvableFuture found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.core.accessibilityservice.AccessibilityServiceInfoCompat found in modules androidx.core.core-1.8.0.aar -> jetified-androidx.core.core-1.8.0-runtime (:androidx.core.core-1.8.0:) and core-1.9.0.aar -> core-1.9.0-runtime (androidx.core:core:1.9.0)
Duplicate class androidx.core.app.ActivityCompat found in modules androidx.core.core-1.8.0.aar -> jetified-androidx.core.core-1.8.0-runtime (:androidx.core.core-1.8.0:) and core-1.9.0.aar -> core-1.9.0-runtime (androidx.core:core:1.9.0)
Duplicate class androidx.core.app.ActivityCompat$1 found in modules androidx.core.core-1.8.0.aar -> jetified-androidx.core.core-1.8.0-runtime (:androidx.core.core-1.8.0:) and core-1.9.0.aar -> core-1.9.0-runtime (androidx.core:core:1.9.0)
Duplicate class androidx.core.app.ActivityCompat$Api16Impl found in modules androidx.core.core-1.8.0.aar -> jetified-androidx.core.core-1.8.0-runtime (:androidx.core.core-1.8.0:) and core-1.9.0.aar -> core-1.9.0-runtime (androidx.core:core:1.9.0)
Duplicate class androidx.core.app.ActivityCompat$Api21Impl found in modules androidx.core.core-1.8.0.aar -> jetified-androidx.core.core-1.8.0-runtime (:androidx.core.core-1.8.0:) and core-1.9.0.aar -> core-1.9.0-runtime (androidx.core:core:1.9.0)
Duplicate class androidx.core.app.ActivityCompat$Api22Impl found in modules androidx.core.core-1.8.0.aar -> jetified-androidx.core.core-1.8.0-runtime (:androidx.core.core-1.8.0:) and core-1.9.0.aar -> core-1.9.0-runtime (androidx.core:core:1.9.0)
Duplicate class androidx.core.app.ActivityCompat$Api23Impl found in modules androidx.core.core-1.8.0.aar -> jetified-androidx.core.core-1.8.0-runtime (:androidx.core.core-1.8.0:) and core-1.9.0.aar -> core-1.9.0-runtime (androidx.core:core:1.9.0)
Duplicate class androidx.core.app.ActivityCompat$Api28Impl found in modules androidx.core.core-1.8.0.aar -> jetified-androidx.core.core-1.8.0-runtime (:androidx.core.core-1.8.0:) and core-1.9.0.aar -> core-1.9.0-runtime (androidx.core:core:1.9.0)
Duplicate clas`

[JoshhSandhu]

The version 1.2.10 solves the problem with the BouncyCastle.Cryptography dll. But now I have an error at building time with duplicated classes:

FAILURE: Build failed with an exception. What went wrong: Execution failed for task :launcher:checkReleaseDuplicateClasses.

A failure occurred while executing com.android.build.gradle.internal.tasks.CheckDuplicatesRunnable
Duplicate class android.support.v4.app.RemoteActionCompatParcelizer found in modules androidx.core.core-1.8.0.aar -> jetified-androidx.core.core-1.8.0-runtime (:androidx.core.core-1.8.0:) and core-1.9.0.aar -> core-1.9.0-runtime (androidx.core:core:1.9.0)
Duplicate class android.support.v4.graphics.drawable.IconCompatParcelizer found in modules androidx.core.core-1.8.0.aar -> jetified-androidx.core.core-1.8.0-runtime (:androidx.core.core-1.8.0:) and core-1.9.0.aar -> core-1.9.0-runtime (androidx.core:core:1.9.0)
Duplicate class android.support.v4.os.ResultReceiver found in modules androidx.core.core-1.8.0.aar -> jetified-androidx.core.core-1.8.0-runtime (:androidx.core.core-1.8.0:) and core-1.9.0.aar -> core-1.9.0-runtime (androidx.core:core:1.9.0)
Duplicate class android.support.v4.os.ResultReceiver$1 found in modules androidx.core.core-1.8.0.aar -> jetified-androidx.core.core-1.8.0-runtime (:androidx.core.core-1.8.0:) and core-1.9.0.aar -> core-1.9.0-runtime (androidx.core:core:1.9.0)
Duplicate class android.support.v4.os.ResultReceiver$MyResultReceiver found in modules androidx.core.core-1.8.0.aar -> jetified-androidx.core.core-1.8.0-runtime (:androidx.core.core-1.8.0:) and core-1.9.0.aar -> core-1.9.0-runtime (androidx.core:core:1.9.0)
Duplicate class android.support.v4.os.ResultReceiver$MyRunnable found in modules androidx.core.core-1.8.0.aar -> jetified-androidx.core.core-1.8.0-runtime (:androidx.core.core-1.8.0:) and core-1.9.0.aar -> core-1.9.0-runtime (androidx.core:core:1.9.0)
Duplicate class androidx.arch.core.internal.FastSafeIterableMap found in modules androidx.arch.core.core-common-2.2.0.jar -> jetified-androidx.arch.core.core-common-2.2.0 (androidx.arch.core.core-common-2.2.0.jar) and core-common-2.1.0.jar -> core-common-2.1.0 (androidx.arch.core:core-common:2.1.0)
Duplicate class androidx.arch.core.internal.SafeIterableMap found in modules androidx.arch.core.core-common-2.2.0.jar -> jetified-androidx.arch.core.core-common-2.2.0 (androidx.arch.core.core-common-2.2.0.jar) and core-common-2.1.0.jar -> core-common-2.1.0 (androidx.arch.core:core-common:2.1.0)
Duplicate class androidx.arch.core.internal.SafeIterableMap$AscendingIterator found in modules androidx.arch.core.core-common-2.2.0.jar -> jetified-androidx.arch.core.core-common-2.2.0 (androidx.arch.core.core-common-2.2.0.jar) and core-common-2.1.0.jar -> core-common-2.1.0 (androidx.arch.core:core-common:2.1.0)
Duplicate class androidx.arch.core.internal.SafeIterableMap$DescendingIterator found in modules androidx.arch.core.core-common-2.2.0.jar -> jetified-androidx.arch.core.core-common-2.2.0 (androidx.arch.core.core-common-2.2.0.jar) and core-common-2.1.0.jar -> core-common-2.1.0 (androidx.arch.core:core-common:2.1.0)
Duplicate class androidx.arch.core.internal.SafeIterableMap$Entry found in modules androidx.arch.core.core-common-2.2.0.jar -> jetified-androidx.arch.core.core-common-2.2.0 (androidx.arch.core.core-common-2.2.0.jar) and core-common-2.1.0.jar -> core-common-2.1.0 (androidx.arch.core:core-common:2.1.0)
Duplicate class androidx.arch.core.internal.SafeIterableMap$IteratorWithAdditions found in modules androidx.arch.core.core-common-2.2.0.jar -> jetified-androidx.arch.core.core-common-2.2.0 (androidx.arch.core.core-common-2.2.0.jar) and core-common-2.1.0.jar -> core-common-2.1.0 (androidx.arch.core:core-common:2.1.0)
Duplicate class androidx.arch.core.internal.SafeIterableMap$ListIterator found in modules androidx.arch.core.core-common-2.2.0.jar -> jetified-androidx.arch.core.core-common-2.2.0 (androidx.arch.core.core-common-2.2.0.jar) and core-common-2.1.0.jar -> core-common-2.1.0 (androidx.arch.core:core-common:2.1.0)
Duplicate class androidx.arch.core.internal.SafeIterableMap$SupportRemove found in modules androidx.arch.core.core-common-2.2.0.jar -> jetified-androidx.arch.core.core-common-2.2.0 (androidx.arch.core.core-common-2.2.0.jar) and core-common-2.1.0.jar -> core-common-2.1.0 (androidx.arch.core:core-common:2.1.0)
Duplicate class androidx.arch.core.util.Function found in modules androidx.arch.core.core-common-2.2.0.jar -> jetified-androidx.arch.core.core-common-2.2.0 (androidx.arch.core.core-common-2.2.0.jar) and core-common-2.1.0.jar -> core-common-2.1.0 (androidx.arch.core:core-common:2.1.0)
Duplicate class androidx.collection.ArrayMap found in modules androidx.collection.collection-1.2.0.jar -> jetified-androidx.collection.collection-1.2.0 (androidx.collection.collection-1.2.0.jar) and collection-1.1.0.jar -> collection-1.1.0 (androidx.collection:collection:1.1.0)
Duplicate class androidx.collection.ArraySet found in modules androidx.collection.collection-1.2.0.jar -> jetified-androidx.collection.collection-1.2.0 (androidx.collection.collection-1.2.0.jar) and collection-1.1.0.jar -> collection-1.1.0 (androidx.collection:collection:1.1.0)
Duplicate class androidx.collection.CircularArray found in modules androidx.collection.collection-1.2.0.jar -> jetified-androidx.collection.collection-1.2.0 (androidx.collection.collection-1.2.0.jar) and collection-1.1.0.jar -> collection-1.1.0 (androidx.collection:collection:1.1.0)
Duplicate class androidx.collection.CircularIntArray found in modules androidx.collection.collection-1.2.0.jar -> jetified-androidx.collection.collection-1.2.0 (androidx.collection.collection-1.2.0.jar) and collection-1.1.0.jar -> collection-1.1.0 (androidx.collection:collection:1.1.0)
Duplicate class androidx.collection.ContainerHelpers found in modules androidx.collection.collection-1.2.0.jar -> jetified-androidx.collection.collection-1.2.0 (androidx.collection.collection-1.2.0.jar) and collection-1.1.0.jar -> collection-1.1.0 (androidx.collection:collection:1.1.0)
Duplicate class androidx.collection.LongSparseArray found in modules androidx.collection.collection-1.2.0.jar -> jetified-androidx.collection.collection-1.2.0 (androidx.collection.collection-1.2.0.jar) and collection-1.1.0.jar -> collection-1.1.0 (androidx.collection:collection:1.1.0)
Duplicate class androidx.collection.LruCache found in modules androidx.collection.collection-1.2.0.jar -> jetified-androidx.collection.collection-1.2.0 (androidx.collection.collection-1.2.0.jar) and collection-1.1.0.jar -> collection-1.1.0 (androidx.collection:collection:1.1.0)
Duplicate class androidx.collection.SimpleArrayMap found in modules androidx.collection.collection-1.2.0.jar -> jetified-androidx.collection.collection-1.2.0 (androidx.collection.collection-1.2.0.jar) and collection-1.1.0.jar -> collection-1.1.0 (androidx.collection:collection:1.1.0)
Duplicate class androidx.collection.SparseArrayCompat found in modules androidx.collection.collection-1.2.0.jar -> jetified-androidx.collection.collection-1.2.0 (androidx.collection.collection-1.2.0.jar) and collection-1.1.0.jar -> collection-1.1.0 (androidx.collection:collection:1.1.0)
Duplicate class androidx.concurrent.futures.AbstractResolvableFuture found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.AbstractResolvableFuture$1 found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.AbstractResolvableFuture$AtomicHelper found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.AbstractResolvableFuture$Cancellation found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.AbstractResolvableFuture$Failure found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.AbstractResolvableFuture$Failure$1 found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.AbstractResolvableFuture$Listener found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.AbstractResolvableFuture$SafeAtomicHelper found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.AbstractResolvableFuture$SetFuture found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.AbstractResolvableFuture$SynchronizedHelper found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.AbstractResolvableFuture$Waiter found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.CallbackToFutureAdapter found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.CallbackToFutureAdapter$Completer found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.CallbackToFutureAdapter$FutureGarbageCollectedException found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.CallbackToFutureAdapter$Resolver found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.CallbackToFutureAdapter$SafeFuture found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.CallbackToFutureAdapter$SafeFuture$1 found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.DirectExecutor found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.concurrent.futures.ResolvableFuture found in modules androidx.concurrent.concurrent-futures-1.1.0.jar -> jetified-androidx.concurrent.concurrent-futures-1.1.0 (androidx.concurrent.concurrent-futures-1.1.0.jar) and concurrent-futures-1.0.0.jar -> jetified-concurrent-futures-1.0.0 (androidx.concurrent:concurrent-futures:1.0.0)
Duplicate class androidx.core.accessibilityservice.AccessibilityServiceInfoCompat found in modules androidx.core.core-1.8.0.aar -> jetified-androidx.core.core-1.8.0-runtime (:androidx.core.core-1.8.0:) and core-1.9.0.aar -> core-1.9.0-runtime (androidx.core:core:1.9.0)
Duplicate class androidx.core.app.ActivityCompat found in modules androidx.core.core-1.8.0.aar -> jetified-androidx.core.core-1.8.0-runtime (:androidx.core.core-1.8.0:) and core-1.9.0.aar -> core-1.9.0-runtime (androidx.core:core:1.9.0)
Duplicate class androidx.core.app.ActivityCompat$1 found in modules androidx.core.core-1.8.0.aar -> jetified-androidx.core.core-1.8.0-runtime (:androidx.core.core-1.8.0:) and core-1.9.0.aar -> core-1.9.0-runtime (androidx.core:core:1.9.0)
Duplicate class androidx.core.app.ActivityCompat$Api16Impl found in modules androidx.core.core-1.8.0.aar -> jetified-androidx.core.core-1.8.0-runtime (:androidx.core.core-1.8.0:) and core-1.9.0.aar -> core-1.9.0-runtime (androidx.core:core:1.9.0)
Duplicate class androidx.core.app.ActivityCompat$Api21Impl found in modules androidx.core.core-1.8.0.aar -> jetified-androidx.core.core-1.8.0-runtime (:androidx.core.core-1.8.0:) and core-1.9.0.aar -> core-1.9.0-runtime (androidx.core:core:1.9.0)
Duplicate class androidx.core.app.ActivityCompat$Api22Impl found in modules androidx.core.core-1.8.0.aar -> jetified-androidx.core.core-1.8.0-runtime (:androidx.core.core-1.8.0:) and core-1.9.0.aar -> core-1.9.0-runtime (androidx.core:core:1.9.0)
Duplicate class androidx.core.app.ActivityCompat$Api23Impl found in modules androidx.core.core-1.8.0.aar -> jetified-androidx.core.core-1.8.0-runtime (:androidx.core.core-1.8.0:) and core-1.9.0.aar -> core-1.9.0-runtime (androidx.core:core:1.9.0)
Duplicate class androidx.core.app.ActivityCompat$Api28Impl found in modules androidx.core.core-1.8.0.aar -> jetified-androidx.core.core-1.8.0-runtime (:androidx.core.core-1.8.0:) and core-1.9.0.aar -> core-1.9.0-runtime (androidx.core:core:1.9.0)
Duplicate clas`

Hey! I'm experiencing the same duplicate class errors with Android builds. Here's what I've tried so far, but the issue persists:

• removed unity mobile notifications ("I thought this was adding the conflicting bundled AAR files")
• created custom gradle templates, added configs to force consistent androidX versions
• tried running the External Dependancy Manager (EDM4U), used "force reslove", but found no issues
• clearing cache ---> deleted 'Library/bee/android', 'library/statecashe', reimpoted project

despite all these attempts I am getting the similar build faliure.

I am also using Privy's SDK for auth and transaction signing

the bundled JAR files seem to be coming from th e Solana SDK itself probalbly in the "Assets/Plugins/Android/libs/", I think.
and they are then conflicting with the other dependancies probably maven from privy(In my case can be the privy sdk's webview plugin)

i have a few questions

• was this issue in the previous version of the plugin ?
• any recommended workarounds ?
• are the JAR files necessary ??

env
unity: 6000.2.6f2,
android gradle plugin: 8.7.2,
gradle version : 8.11,
solana sdk: latest version from git
privy sdk: 6.0

thanks in adv for the insights!