From 7230187b1d8bf39da5f1502e4c9eeb8e72dccdff Mon Sep 17 00:00:00 2001
From: Alex Morcos <morcos@chaincode.com>
Date: Tue, 3 Nov 2015 10:02:20 -0500
Subject: [PATCH] Add TxPriority class and comparator

---
 src/txmempool.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/txmempool.h b/src/txmempool.h
index b011c3882..deeb2f7b6 100644
--- a/src/txmempool.h
+++ b/src/txmempool.h
@@ -587,4 +587,17 @@ public:
     bool HaveCoins(const uint256 &txid) const;
 };
 
+// We want to sort transactions by coin age priority
+typedef std::pair<double, CTxMemPool::txiter> TxCoinAgePriority;
+
+struct TxCoinAgePriorityCompare
+{
+    bool operator()(const TxCoinAgePriority& a, const TxCoinAgePriority& b)
+    {
+        if (a.first == b.first)
+            return CompareTxMemPoolEntryByScore()(*(b.second), *(a.second)); //Reverse order to make sort less than
+        return a.first < b.first;
+    }
+};
+
 #endif // BITCOIN_TXMEMPOOL_H