diff --git a/basicswap/basicswap.py b/basicswap/basicswap.py
index bbfb414..d52fb75 100644
--- a/basicswap/basicswap.py
+++ b/basicswap/basicswap.py
@@ -8770,7 +8770,7 @@ class BasicSwap(BaseApp):
             lock_tx_depth = (chain_height - bid.xmr_b_lock_tx.chain_height) + 1
             if lock_tx_depth < ci_to.depth_spendable():
                 raise TemporaryError(
-                    f"Chain B lock tx depth {lock_tx_depth} < required for spending."
+                    f"Chain B lock tx still confirming {lock_tx_depth} / {ci_to.depth_spendable()}."
                 )
 
             if TxTypes.BCH_MERCY in bid.txns:
@@ -8857,9 +8857,7 @@ class BasicSwap(BaseApp):
             ):
                 delay = self.get_delay_retry_seconds()
                 self.log.info(
-                    "Retrying sending adaptor-sig swap chain B spend tx for bid %s in %d seconds",
-                    bid_id.hex(),
-                    delay,
+                    f"Retrying sending adaptor-sig swap chain B spend tx for bid {bid_id.hex()} in {delay} seconds"
                 )
                 self.createActionInSession(
                     delay, ActionTypes.REDEEM_XMR_SWAP_LOCK_TX_B, bid_id, cursor
diff --git a/basicswap/bin/prepare.py b/basicswap/bin/prepare.py
index f1909d9..2cbe01e 100644
--- a/basicswap/bin/prepare.py
+++ b/basicswap/bin/prepare.py
@@ -1520,7 +1520,9 @@ def printVersion(with_coins):
     if len(with_coins) < 1:
         return
     print("Core versions:")
-    with_coins_changed: bool = False if len(with_coins) == 1 and "particl" in with_coins else True
+    with_coins_changed: bool = (
+        False if len(with_coins) == 1 and "particl" in with_coins else True
+    )
     for coin, version in known_coins.items():
         if with_coins_changed and coin not in with_coins:
             continue
diff --git a/basicswap/ui/page_offers.py b/basicswap/ui/page_offers.py
index 3d4620d..f89f4d6 100644
--- a/basicswap/ui/page_offers.py
+++ b/basicswap/ui/page_offers.py
@@ -163,7 +163,9 @@ def parseOfferFormData(swap_client, form_data, page_data, options={}):
     if swap_client.debug:
         page_data["amt_var"] = True if have_data_entry(form_data, "amt_var") else False
         parsed_data["amt_var"] = page_data["amt_var"]
-        page_data["rate_var"] = True if have_data_entry(form_data, "rate_var") else False
+        page_data["rate_var"] = (
+            True if have_data_entry(form_data, "rate_var") else False
+        )
         parsed_data["rate_var"] = page_data["rate_var"]
     else:
         page_data["amt_var"] = True
@@ -634,7 +636,11 @@ def page_offer(self, url_split, post_string):
             swap_client.editOffer(offer_id, change_data)
         elif b"newbid" in form_data:
             show_bid_form = True
-        elif b"sendbid" in form_data and b"confirm" in form_data and b"formid" in form_data:
+        elif (
+            b"sendbid" in form_data
+            and b"confirm" in form_data
+            and b"formid" in form_data
+        ):
             try:
                 addr_from = form_data[b"addr_from"][0].decode("utf-8")
                 extend_data["nb_addr_from"] = addr_from
@@ -719,7 +725,7 @@ def page_offer(self, url_split, post_string):
         "active_ind": offer.active_ind,
         "swap_type": strSwapDesc(offer.swap_type),
         "reverse": reverse_bid,
-        "form_id": get_data_entry_or(form_data, "formid", "") if form_data else ""
+        "form_id": get_data_entry_or(form_data, "formid", "") if form_data else "",
     }
     data.update(extend_data)