diff --git a/electrum/address_synchronizer.py b/electrum/address_synchronizer.py
index 72904bdfc..702ce6612 100644
--- a/electrum/address_synchronizer.py
+++ b/electrum/address_synchronizer.py
@@ -32,7 +32,7 @@ from aiorpcx import TaskGroup
 
 from . import bitcoin, util
 from .bitcoin import COINBASE_MATURITY
-from .util import profiler, bfh, TxMinedInfo, UnrelatedTransactionException
+from .util import profiler, bfh, TxMinedInfo, UnrelatedTransactionException, with_lock
 from .transaction import Transaction, TxOutput, TxInput, PartialTxInput, TxOutpoint, PartialTransaction
 from .synchronizer import Synchronizer
 from .verifier import SPV
@@ -98,12 +98,6 @@ class AddressSynchronizer(Logger):
 
         self.load_and_cleanup()
 
-    def with_lock(func):
-        def func_wrapper(self: 'AddressSynchronizer', *args, **kwargs):
-            with self.lock:
-                return func(self, *args, **kwargs)
-        return func_wrapper
-
     def with_transaction_lock(func):
         def func_wrapper(self: 'AddressSynchronizer', *args, **kwargs):
             with self.transaction_lock:
diff --git a/electrum/blockchain.py b/electrum/blockchain.py
index 4571d0c1a..f911d4b1e 100644
--- a/electrum/blockchain.py
+++ b/electrum/blockchain.py
@@ -29,7 +29,7 @@ from . import util
 from .bitcoin import hash_encode, int_to_hex, rev_hex
 from .crypto import sha256d
 from . import constants
-from .util import bfh, bh2u
+from .util import bfh, bh2u, with_lock
 from .simple_config import SimpleConfig
 from .logging import get_logger, Logger
 
@@ -195,12 +195,6 @@ class Blockchain(Logger):
         self.lock = threading.RLock()
         self.update_size()
 
-    def with_lock(func):
-        def func_wrapper(self, *args, **kwargs):
-            with self.lock:
-                return func(self, *args, **kwargs)
-        return func_wrapper
-
     @property
     def checkpoints(self):
         return constants.net.CHECKPOINTS
diff --git a/electrum/lnhtlc.py b/electrum/lnhtlc.py
index 45b1cf739..40416bbea 100644
--- a/electrum/lnhtlc.py
+++ b/electrum/lnhtlc.py
@@ -3,7 +3,7 @@ from typing import Optional, Sequence, Tuple, List, Dict, TYPE_CHECKING, Set
 import threading
 
 from .lnutil import SENT, RECEIVED, LOCAL, REMOTE, HTLCOwner, UpdateAddHtlc, Direction, FeeUpdate
-from .util import bh2u, bfh
+from .util import bh2u, bfh, with_lock
 
 if TYPE_CHECKING:
     from .json_db import StoredDict
@@ -50,12 +50,6 @@ class HTLCManager:
 
         self._init_maybe_active_htlc_ids()
 
-    def with_lock(func):
-        def func_wrapper(self, *args, **kwargs):
-            with self.lock:
-                return func(self, *args, **kwargs)
-        return func_wrapper
-
     @with_lock
     def ctn_latest(self, sub: HTLCOwner) -> int:
         """Return the ctn for the latest (newest that has a valid sig) ctx of sub"""
diff --git a/electrum/util.py b/electrum/util.py
index 59fd43393..8fb9ca0d6 100644
--- a/electrum/util.py
+++ b/electrum/util.py
@@ -776,7 +776,7 @@ mainnet_block_explorers = {
     'mempool.space': ('https://mempool.space/',
                         {'tx': 'tx/', 'addr': 'address/'}),
     'mempool.emzy.de': ('https://mempool.emzy.de/',
-                        {'tx': 'tx/', 'addr': 'address/'}),  
+                        {'tx': 'tx/', 'addr': 'address/'}),
     'OXT.me': ('https://oxt.me/',
                         {'tx': 'transaction/', 'addr': 'address/'}),
     'smartbit.com.au': ('https://www.smartbit.com.au/',
@@ -797,7 +797,7 @@ testnet_block_explorers = {
     'Blockstream.info': ('https://blockstream.info/testnet/',
                         {'tx': 'tx/', 'addr': 'address/'}),
     'mempool.space': ('https://mempool.space/testnet/',
-                        {'tx': 'tx/', 'addr': 'address/'}),    
+                        {'tx': 'tx/', 'addr': 'address/'}),
     'smartbit.com.au': ('https://testnet.smartbit.com.au/',
                        {'tx': 'tx/', 'addr': 'address/'}),
     'system default': ('blockchain://000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943/',
@@ -1116,6 +1116,14 @@ def ignore_exceptions(func):
     return wrapper
 
 
+def with_lock(func):
+    """Decorator to enforce a lock on a function call."""
+    def func_wrapper(self, *args, **kwargs):
+        with self.lock:
+            return func(self, *args, **kwargs)
+    return func_wrapper
+
+
 class TxMinedInfo(NamedTuple):
     height: int                        # height of block that mined tx
     conf: Optional[int] = None         # number of confirmations, SPV verified (None means unknown)