From bf663f8e93454fdc7c77e298586cefbb4488ee4c Mon Sep 17 00:00:00 2001
From: Alex Morcos <morcos@chaincode.com>
Date: Tue, 29 Nov 2016 17:15:12 -0500
Subject: [PATCH] remove external usage of mempool conflict tracking

---
 src/test/mempool_tests.cpp |  2 +-
 src/txmempool.cpp          |  4 ++--
 src/txmempool.h            |  2 +-
 src/validation.cpp         | 12 +++---------
 4 files changed, 7 insertions(+), 13 deletions(-)

diff --git a/src/test/mempool_tests.cpp b/src/test/mempool_tests.cpp
index 1faf8b6ae..2fb56e172 100644
--- a/src/test/mempool_tests.cpp
+++ b/src/test/mempool_tests.cpp
@@ -412,7 +412,7 @@ BOOST_AUTO_TEST_CASE(MempoolAncestorIndexingTest)
     /* after tx6 is mined, tx7 should move up in the sort */
     std::vector<CTransactionRef> vtx;
     vtx.push_back(MakeTransactionRef(tx6));
-    pool.removeForBlock(vtx, 1, NULL, false);
+    pool.removeForBlock(vtx, 1);
 
     sortedOrder.erase(sortedOrder.begin()+1);
     sortedOrder.pop_back();
diff --git a/src/txmempool.cpp b/src/txmempool.cpp
index c035a84db..3bea0e4fb 100644
--- a/src/txmempool.cpp
+++ b/src/txmempool.cpp
@@ -597,7 +597,7 @@ void CTxMemPool::removeConflicts(const CTransaction &tx, std::vector<CTransactio
  * Called when a block is connected. Removes from mempool and updates the miner fee estimator.
  */
 void CTxMemPool::removeForBlock(const std::vector<CTransactionRef>& vtx, unsigned int nBlockHeight,
-                                std::vector<CTransactionRef>* conflicts, bool fCurrentEstimate)
+                                bool fCurrentEstimate)
 {
     LOCK(cs);
     std::vector<CTxMemPoolEntry> entries;
@@ -617,7 +617,7 @@ void CTxMemPool::removeForBlock(const std::vector<CTransactionRef>& vtx, unsigne
             stage.insert(it);
             RemoveStaged(stage, true);
         }
-        removeConflicts(*tx, conflicts);
+        removeConflicts(*tx);
         ClearPrioritisation(tx->GetHash());
     }
     // After the txs in the new block have been removed from the mempool, update policy estimates
diff --git a/src/txmempool.h b/src/txmempool.h
index 23fe5a7ab..2f4098145 100644
--- a/src/txmempool.h
+++ b/src/txmempool.h
@@ -531,7 +531,7 @@ public:
     void removeForReorg(const CCoinsViewCache *pcoins, unsigned int nMemPoolHeight, int flags);
     void removeConflicts(const CTransaction &tx, std::vector<CTransactionRef>* removed = NULL);
     void removeForBlock(const std::vector<CTransactionRef>& vtx, unsigned int nBlockHeight,
-                        std::vector<CTransactionRef>* conflicts = NULL, bool fCurrentEstimate = true);
+                        bool fCurrentEstimate = true);
     void clear();
     void _clear(); //lock free
     bool CompareDepthAndScore(const uint256& hasha, const uint256& hashb);
diff --git a/src/validation.cpp b/src/validation.cpp
index a541978c8..a6377f031 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -2153,11 +2153,10 @@ static int64_t nTimeChainState = 0;
 static int64_t nTimePostConnect = 0;
 
 /**
- * Used to track conflicted transactions removed from mempool and transactions
- * applied to the UTXO state as a part of a single ActivateBestChainStep call.
+ * Used to track blocks whose transactions were applied to the UTXO state as a
+ * part of a single ActivateBestChainStep call.
  */
 struct ConnectTrace {
-    std::vector<CTransactionRef> txConflicted;
     std::vector<std::pair<CBlockIndex*, std::shared_ptr<const CBlock> > > blocksConnected;
 };
 
@@ -2208,7 +2207,7 @@ bool static ConnectTip(CValidationState& state, const CChainParams& chainparams,
     int64_t nTime5 = GetTimeMicros(); nTimeChainState += nTime5 - nTime4;
     LogPrint("bench", "  - Writing chainstate: %.2fms [%.2fs]\n", (nTime5 - nTime4) * 0.001, nTimeChainState * 0.000001);
     // Remove conflicting transactions from the mempool.;
-    mempool.removeForBlock(blockConnecting.vtx, pindexNew->nHeight, &connectTrace.txConflicted, !IsInitialBlockDownload());
+    mempool.removeForBlock(blockConnecting.vtx, pindexNew->nHeight, !IsInitialBlockDownload());
     // Update chainActive & related variables.
     UpdateTip(pindexNew, chainparams);
 
@@ -2433,11 +2432,6 @@ bool ActivateBestChain(CValidationState &state, const CChainParams& chainparams,
 
         // throw all transactions though the signal-interface
         // while _not_ holding the cs_main lock
-        for (const auto& tx : connectTrace.txConflicted)
-        {
-            GetMainSignals().SyncTransaction(*tx, pindexNewTip, CMainSignals::SYNC_TRANSACTION_NOT_IN_BLOCK);
-        }
-        // ... and about transactions that got confirmed:
         for (const auto& pair : connectTrace.blocksConnected) {
             assert(pair.second);
             const CBlock& block = *(pair.second);