diff --git a/app/wallet/__init__.py b/app/domains/wallet/__init__.py
similarity index 90%
rename from app/wallet/__init__.py
rename to app/domains/wallet/__init__.py
index 4dd3433..b76f03b 100644
--- a/app/wallet/__init__.py
+++ b/app/domains/wallet/__init__.py
@@ -6,7 +6,7 @@ Re-exports the canonical public API of WalletManagerV2. The bulk of the
 implementation lives in app.wallet.manager (moved verbatim from
 app.wallet_manager_v2 on 2026-07-07).
 """
-from app.wallet.manager import (  # noqa: F401
+from app.domains.wallet.manager import (  # noqa: F401
     ChainMeta,
     PaymentRecord,
     PaymentType,
diff --git a/app/wallet/manager.py b/app/domains/wallet/manager.py
similarity index 100%
rename from app/wallet/manager.py
rename to app/domains/wallet/manager.py
diff --git a/app/wallet_manager_v2.py b/app/wallet_manager_v2.py
index 1207318..1edcbf2 100644
--- a/app/wallet_manager_v2.py
+++ b/app/wallet_manager_v2.py
@@ -1,6 +1,11 @@
-"""Backward-compat shim — moved to app.wallet.manager in P3B."""
-from app.wallet.manager import *  # noqa: F401,F403
-from app.wallet.manager import (  # noqa: F401
+"""wallet_manager_v2.py - DEPRECATED shim. Use app.domains.wallet.manager.
+
+Phase 4 of AUDIT-2026-Q3.md moved this to app/domains/wallet/manager/.
+This shim re-exports the public surface for legacy callers.
+"""
+from app.domains.wallet.manager import *  # noqa: F401,F403
+from app.domains.wallet.manager import (  # noqa: F401
+    CHAIN_REGISTRY,
     ChainMeta,
     PaymentRecord,
     PaymentType,
@@ -16,5 +21,7 @@ from app.wallet.manager import (  # noqa: F401
     ZKAddressVerifier,
     get_wallet_manager_v2,
     import_legacy_wallets,
+    logger,
     _build_registry,
+    _wallet_manager_instance,
 )