From e7876b297901a4b49daafc9ccd2b5c34a6214039 Mon Sep 17 00:00:00 2001
From: Cozz Lovan <cozzlovan@yahoo.com>
Date: Sun, 2 Nov 2014 18:28:43 +0100
Subject: [PATCH] [Wallet] Prevent user from paying a non-sense fee

---
 src/wallet.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/wallet.cpp b/src/wallet.cpp
index f1cf10497..2d59506ba 100644
--- a/src/wallet.cpp
+++ b/src/wallet.cpp
@@ -1633,6 +1633,9 @@ CAmount CWallet::GetMinimumFee(unsigned int nTxBytes, unsigned int nConfirmTarge
 {
     // payTxFee is user-set "I want to pay this much"
     CAmount nFeeNeeded = payTxFee.GetFee(nTxBytes);
+    // prevent user from paying a non-sense fee (like 1 satoshi): 0 < fee < minRelayFee
+    if (nFeeNeeded > 0 && nFeeNeeded < ::minRelayTxFee.GetFee(nTxBytes))
+        nFeeNeeded = ::minRelayTxFee.GetFee(nTxBytes);
     // User didn't set: use -txconfirmtarget to estimate...
     if (nFeeNeeded == 0)
         nFeeNeeded = pool.estimateFee(nConfirmTarget).GetFee(nTxBytes);