From 5c8f1bc6d13d746ff4c07b36ddb7427315859ad2 Mon Sep 17 00:00:00 2001
From: tecnovert <tecnovert@tecnovert.net>
Date: Sat, 30 May 2026 21:51:31 +0200
Subject: [PATCH] fix: raise default max fee rate from 2 to 4x estimated fee

---
 basicswap/interface/utils.py | 4 ++--
 basicswap/interface/xmr.py   | 2 +-
 doc/release-notes.md         | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/basicswap/interface/utils.py b/basicswap/interface/utils.py
index 409f667..870a3f0 100644
--- a/basicswap/interface/utils.py
+++ b/basicswap/interface/utils.py
@@ -23,7 +23,7 @@ class FeeValidator:
     def __init__(self, **kwargs):
         default_low_fee_conf_target: int = 24
         default_low_fee_rate: int = 0
-        default_high_estimated_feerate_multiplier: float = 2.0
+        default_high_estimated_feerate_multiplier: float = 4.0
         default_high_fee_rate: int = self.defaultMaxFeeRate()
         if self._sc:
             chain_client_settings = self._sc.getChainClientSettings(
@@ -82,7 +82,7 @@ class FeeValidator:
 
         if self._high_estimated_feerate_multiplier >= 1.0:
             max_feerate, max_feerate_src = self.get_fee_rate()
-            max_feerate = (
+            max_feerate = int(
                 self.make_int(max_feerate) * self._high_estimated_feerate_multiplier
             )
         else:
diff --git a/basicswap/interface/xmr.py b/basicswap/interface/xmr.py
index a784f65..cd02b67 100644
--- a/basicswap/interface/xmr.py
+++ b/basicswap/interface/xmr.py
@@ -863,5 +863,5 @@ class XMRInterface(CoinInterface):
             self._log.error(f"listWalletTransactions failed: {e}")
             return []
 
-    def validateFeeRate(self, fee_rate: int) -> bool:
+    def validateFeeRate(self, fee_rate: int) -> None:
         pass  # Fee rate isn't used
diff --git a/doc/release-notes.md b/doc/release-notes.md
index d8207cf..3fc3035 100644
--- a/doc/release-notes.md
+++ b/doc/release-notes.md
@@ -5,7 +5,7 @@
   - Prevent sending bids to offers
   - Reject received offers, and
   - Prevent sending offers where the chain feerates are out of range.
-  - Valid feerate range is the nodes estimated feerate for confirmation in 24 blocks to 2x the estimated feerate.
+  - Valid feerate range is the node's estimated feerate for confirmation in 24 blocks to 4x the estimated feerate.
     - The minimum feerate confirmation can be adjusted with the "low_fee_conf_target" setting.
     - If "low_feerate" is set above 0 it is used instead of the dynamic feerate with "low_fee_conf_target"
     - The maximum feerate multiplier can be adjusted with the "high_estimated_feerate_multiplier" setting.