From 23ca9e319ff86f3dbcdbdbafa6145d548b5fbd48 Mon Sep 17 00:00:00 2001
From: Lucas Soriano del Pino <lucas_soriano@fastmail.com>
Date: Wed, 5 Jul 2023 22:56:30 +1000
Subject: [PATCH] feat(app): Consider fee when assessing usable balance

---
 mobile/lib/features/trade/trade_bottom_sheet_tab.dart      | 3 ++-
 mobile/lib/features/trade/trade_value_change_notifier.dart | 4 ++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/mobile/lib/features/trade/trade_bottom_sheet_tab.dart b/mobile/lib/features/trade/trade_bottom_sheet_tab.dart
index 0ef0431f6..e7b641d39 100644
--- a/mobile/lib/features/trade/trade_bottom_sheet_tab.dart
+++ b/mobile/lib/features/trade/trade_bottom_sheet_tab.dart
@@ -231,7 +231,8 @@ class _TradeBottomSheetTabState extends State<TradeBottomSheetTab> {
                                 });
                               }
 
-                              if (usableBalance < margin) {
+                              Amount fee = provider.orderMatchingFee(direction) ?? Amount.zero();
+                              if (usableBalance < margin + fee.sats) {
                                 return "Insufficient balance";
                               }
 
diff --git a/mobile/lib/features/trade/trade_value_change_notifier.dart b/mobile/lib/features/trade/trade_value_change_notifier.dart
index 14b4dd931..766d04d60 100644
--- a/mobile/lib/features/trade/trade_value_change_notifier.dart
+++ b/mobile/lib/features/trade/trade_value_change_notifier.dart
@@ -67,6 +67,10 @@ class TradeValuesChangeNotifier extends ChangeNotifier implements Subscriber {
     }
   }
 
+  Amount? orderMatchingFee(Direction direction) {
+    return fromDirection(direction).fee;
+  }
+
   void updateQuantity(Direction direction, double quantity) {
     fromDirection(direction).updateQuantity(quantity);
     notifyListeners();