diff --git a/electrum/json_db.py b/electrum/json_db.py
index 226c8480d..b4b56a38d 100644
--- a/electrum/json_db.py
+++ b/electrum/json_db.py
@@ -50,6 +50,17 @@ registered_dicts = {}
 registered_dict_keys = {}
 registered_parent_keys = {}
 
+def register_dict(name, method, _type):
+    registered_dicts[name] = method, _type
+
+def register_name(name, method, _type):
+    registered_names[name] = method, _type
+
+def register_dict_key(name, method):
+    registered_dict_keys[name] = method
+
+def register_parent_key(name, method):
+    registered_parent_keys[name] = method
 
 def stored_as(name, _type=dict):
     """ decorator that indicates the storage key of a stored object"""
@@ -212,18 +223,6 @@ class JsonDB(Logger):
     def _should_convert_to_stored_dict(self, key) -> bool:
         return True
 
-    def register_dict(self, name, method, _type):
-        registered_dicts[name] = method, _type
-
-    def register_name(self, name, method, _type):
-        registered_names[name] = method, _type
-
-    def register_dict_key(self, name, method):
-        registered_dict_keys[name] = method
-
-    def register_parent_key(self, name, method):
-        registered_parent_keys[name] = method
-
     def _convert_dict(self, path, key, v):
         if key in registered_dicts:
             constructor, _type = registered_dicts[key]
diff --git a/electrum/wallet_db.py b/electrum/wallet_db.py
index 2b38ad7de..cf889d453 100644
--- a/electrum/wallet_db.py
+++ b/electrum/wallet_db.py
@@ -43,6 +43,7 @@ from .transaction import Transaction, TxOutpoint, tx_from_any, PartialTransactio
 from .logging import Logger
 
 from .lnutil import LOCAL, REMOTE, HTLCOwner, ChannelType
+from . import json_db
 from .json_db import StoredDict, JsonDB, locked, modifier, StoredObject, stored_in, stored_as
 from .plugin import run_hook, plugin_loaders
 from .version import ELECTRUM_VERSION
@@ -86,25 +87,25 @@ class DBMetadata(StoredObject):
 #       separate tracking issues
 class WalletFileExceptionVersion51(WalletFileException): pass
 
+# register dicts that require value conversions not handled by constructor
+json_db.register_dict('transactions', lambda x: tx_from_any(x, deserialize=False), None)
+json_db.register_dict('prevouts_by_scripthash', lambda x: set(tuple(k) for k in x), None)
+json_db.register_dict('data_loss_protect_remote_pcp', lambda x: bytes.fromhex(x), None)
+# register dicts that require key conversion
+for key in [
+        'adds', 'locked_in', 'settles', 'fails', 'fee_updates', 'buckets',
+        'unacked_updates', 'unfulfilled_htlcs', 'fail_htlc_reasons', 'onion_keys']:
+    json_db.register_dict_key(key, int)
+for key in ['log']:
+    json_db.register_dict_key(key, lambda x: HTLCOwner(int(x)))
+for key in ['locked_in', 'fails', 'settles']:
+    json_db.register_parent_key(key, lambda x: HTLCOwner(int(x)))
+
 
 class WalletDB(JsonDB):
 
     def __init__(self, raw, *, manual_upgrades: bool):
         JsonDB.__init__(self, {})
-        # register dicts that require value conversions not handled by constructor
-        self.register_dict('transactions', lambda x: tx_from_any(x, deserialize=False), None)
-        self.register_dict('prevouts_by_scripthash', lambda x: set(tuple(k) for k in x), None)
-        self.register_dict('data_loss_protect_remote_pcp', lambda x: bytes.fromhex(x), None)
-        # register dicts that require key conversion
-        for key in [
-                'adds', 'locked_in', 'settles', 'fails', 'fee_updates', 'buckets',
-                'unacked_updates', 'unfulfilled_htlcs', 'fail_htlc_reasons', 'onion_keys']:
-            self.register_dict_key(key, int)
-        for key in ['log']:
-            self.register_dict_key(key, lambda x: HTLCOwner(int(x)))
-        for key in ['locked_in', 'fails', 'settles']:
-            self.register_parent_key(key, lambda x: HTLCOwner(int(x)))
-
         self._manual_upgrades = manual_upgrades
         self._called_after_upgrade_tasks = False
         if raw:  # loading existing db