From 2c98a4f5fea89b776b7fe20fc262cbd1f45436ed Mon Sep 17 00:00:00 2001
From: blackjok3r <blackjok3r@gmail.com>
Date: Mon, 29 Oct 2018 23:40:05 +0800
Subject: [PATCH] try

---
 src/main.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/main.cpp b/src/main.cpp
index 31becb7d2..ea5255928 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1310,6 +1310,7 @@ CAmount GetMinRelayFee(const CTransaction& tx, unsigned int nBytes, bool fAllowF
     return nMinFee;
 }
 
+using boost::optional;
 
 bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransaction &tx, bool fLimitFree,bool* pfMissingInputs, bool fRejectAbsurdFee, boost::optional<int> bool_nullifiers)
 {