From c06c3935cae3f815a0074435f48e0d836f194b91 Mon Sep 17 00:00:00 2001
From: julian <julian@cypherstack.com>
Date: Tue, 31 Jan 2023 10:37:03 -0600
Subject: [PATCH] handle fee rounding error

---
 lib/services/mixins/paynym_wallet_interface.dart | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/lib/services/mixins/paynym_wallet_interface.dart b/lib/services/mixins/paynym_wallet_interface.dart
index e1fe7cbee..c979e80da 100644
--- a/lib/services/mixins/paynym_wallet_interface.dart
+++ b/lib/services/mixins/paynym_wallet_interface.dart
@@ -455,7 +455,7 @@ mixin PaynymWalletInterface {
       // check estimates are correct and build notification tx
       if (changeAmount >= _dustLimitP2PKH &&
           satoshisBeingUsed - amountToSend - changeAmount == feeForWithChange) {
-        final txn = await _createNotificationTx(
+        var txn = await _createNotificationTx(
           targetPaymentCodeString: targetPaymentCodeString,
           utxosToUse: utxoObjectsToUse,
           utxoSigningData: utxoSigningData,
@@ -464,6 +464,18 @@ mixin PaynymWalletInterface {
 
         int feeBeingPaid = satoshisBeingUsed - amountToSend - changeAmount;
 
+        // make sure minimum fee is accurate if that is being used
+        if (txn.item2 - feeBeingPaid == 1) {
+          changeAmount -= 1;
+          feeBeingPaid += 1;
+          txn = await _createNotificationTx(
+            targetPaymentCodeString: targetPaymentCodeString,
+            utxosToUse: utxoObjectsToUse,
+            utxoSigningData: utxoSigningData,
+            change: changeAmount,
+          );
+        }
+
         Map<String, dynamic> transactionObject = {
           "hex": txn.item1,
           "recipientPaynym": targetPaymentCodeString,