From f37a64208c6c0d2ce29b33c060ccf62731cb4786 Mon Sep 17 00:00:00 2001
From: UdjinM6 <UdjinM6@users.noreply.github.com>
Date: Wed, 13 Dec 2017 15:43:05 +0300
Subject: [PATCH] InstantSend txes should never qualify to be a 0-fee txes
 (#1777)

---
 src/wallet/wallet.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
index f958bbf04..eadd825b5 100644
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -3458,7 +3458,8 @@ bool CWallet::CreateTransaction(const vector<CRecipient>& vecSend, CWalletTx& wt
                 dPriority = wtxNew.ComputePriority(dPriority, nBytes);
 
                 // Can we complete this as a free transaction?
-                if (fSendFreeTransactions && nBytes <= MAX_FREE_TRANSACTION_CREATE_SIZE)
+                // Note: InstantSend transaction can't be a free one
+                if (!fUseInstantSend && fSendFreeTransactions && nBytes <= MAX_FREE_TRANSACTION_CREATE_SIZE)
                 {
                     // Not enough fee: enough priority?
                     double dPriorityNeeded = mempool.estimateSmartPriority(nTxConfirmTarget);