Code simplifications after CTransaction::GetHash() caching

12 files changed, 67 insertions, 78 deletions

diff --git a/src/bloom.cpp b/src/bloom.cpp
index 1bfcbd406f..26e366179c 100644
--- a/src/bloom.cpp
+++ b/src/bloom.cpp
@@ -99,7 +99,7 @@ bool CBloomFilter::IsWithinSizeConstraints() const
     return vData.size() <= MAX_BLOOM_FILTER_SIZE && nHashFuncs <= MAX_HASH_FUNCS;
 }
 
-bool CBloomFilter::IsRelevantAndUpdate(const CTransaction& tx, const uint256& hash)
+bool CBloomFilter::IsRelevantAndUpdate(const CTransaction& tx)
 {
     bool fFound = false;
     // Match if the filter contains the hash of tx
@@ -108,6 +108,7 @@ bool CBloomFilter::IsRelevantAndUpdate(const CTransaction& tx, const uint256& ha
         return true;
     if (isEmpty)
         return false;
+    const uint256& hash = tx.GetHash();
     if (contains(hash))
         fFound = true;
 
diff --git a/src/bloom.h b/src/bloom.h
index 75e3f38c55..956bead87f 100644
--- a/src/bloom.h
+++ b/src/bloom.h
@@ -83,7 +83,7 @@ public:
     bool IsWithinSizeConstraints() const;
 
     // Also adds any outputs which match the filter to the filter (to match their spending txes)
-    bool IsRelevantAndUpdate(const CTransaction& tx, const uint256& hash);
+    bool IsRelevantAndUpdate(const CTransaction& tx);
 
     // Checks for empty and full filters to avoid wasting cpu
     void UpdateEmptyFull();
diff --git a/src/core.h b/src/core.h
index 1a20145ccf..27fda95552 100644
--- a/src/core.h
+++ b/src/core.h
@@ -496,12 +496,6 @@ public:
 
     uint256 BuildMerkleTree() const;
 
-    const uint256 &GetTxHash(unsigned int nIndex) const {
-        assert(vMerkleTree.size() > 0); // BuildMerkleTree must have been called first
-        assert(nIndex < vtx.size());
-        return vMerkleTree[nIndex];
-    }
-
     std::vector<uint256> GetMerkleBranch(int nIndex) const;
     static uint256 CheckMerkleBranch(uint256 hash, const std::vector<uint256>& vMerkleBranch, int nIndex);
     void print() const;
diff --git a/src/main.cpp b/src/main.cpp
index 006ec7cabc..d3f04b95fa 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -130,8 +130,8 @@ namespace {
 
 namespace {
 struct CMainSignals {
-    // Notifies listeners of updated transaction data (passing hash, transaction, and optionally the block it is found in.
-    boost::signals2::signal<void (const uint256 &, const CTransaction &, const CBlock *)> SyncTransaction;
+    // Notifies listeners of updated transaction data (transaction, and optionally the block it is found in.
+    boost::signals2::signal<void (const CTransaction &, const CBlock *)> SyncTransaction;
     // Notifies listeners of an erased transaction (currently disabled, requires transaction replacement).
     boost::signals2::signal<void (const uint256 &)> EraseTransaction;
     // Notifies listeners of an updated transaction without new data (for now: a coinbase potentially becoming visible).
@@ -146,7 +146,7 @@ struct CMainSignals {
 }
 
 void RegisterWallet(CWalletInterface* pwalletIn) {
-    g_signals.SyncTransaction.connect(boost::bind(&CWalletInterface::SyncTransaction, pwalletIn, _1, _2, _3));
+    g_signals.SyncTransaction.connect(boost::bind(&CWalletInterface::SyncTransaction, pwalletIn, _1, _2));
     g_signals.EraseTransaction.connect(boost::bind(&CWalletInterface::EraseFromWallet, pwalletIn, _1));
     g_signals.UpdatedTransaction.connect(boost::bind(&CWalletInterface::UpdatedTransaction, pwalletIn, _1));
     g_signals.SetBestChain.connect(boost::bind(&CWalletInterface::SetBestChain, pwalletIn, _1));
@@ -160,7 +160,7 @@ void UnregisterWallet(CWalletInterface* pwalletIn) {
     g_signals.SetBestChain.disconnect(boost::bind(&CWalletInterface::SetBestChain, pwalletIn, _1));
     g_signals.UpdatedTransaction.disconnect(boost::bind(&CWalletInterface::UpdatedTransaction, pwalletIn, _1));
     g_signals.EraseTransaction.disconnect(boost::bind(&CWalletInterface::EraseFromWallet, pwalletIn, _1));
-    g_signals.SyncTransaction.disconnect(boost::bind(&CWalletInterface::SyncTransaction, pwalletIn, _1, _2, _3));
+    g_signals.SyncTransaction.disconnect(boost::bind(&CWalletInterface::SyncTransaction, pwalletIn, _1, _2));
 }
 
 void UnregisterAllWallets() {
@@ -172,8 +172,8 @@ void UnregisterAllWallets() {
     g_signals.SyncTransaction.disconnect_all_slots();
 }
 
-void SyncWithWallets(const uint256 &hash, const CTransaction &tx, const CBlock *pblock) {
-    g_signals.SyncTransaction(hash, tx, pblock);
+void SyncWithWallets(const CTransaction &tx, const CBlock *pblock) {
+    g_signals.SyncTransaction(tx, pblock);
 }
 
 //////////////////////////////////////////////////////////////////////////////
@@ -952,7 +952,7 @@ bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransa
         pool.addUnchecked(hash, entry);
     }
 
-    g_signals.SyncTransaction(hash, tx, NULL);
+    g_signals.SyncTransaction(tx, NULL);
 
     return true;
 }
@@ -1479,7 +1479,7 @@ void UpdateTime(CBlockHeader& block, const CBlockIndex* pindexPrev)
 
 
 
-void UpdateCoins(const CTransaction& tx, CValidationState &state, CCoinsViewCache &inputs, CTxUndo &txundo, int nHeight, const uint256 &txhash)
+void UpdateCoins(const CTransaction& tx, CValidationState &state, CCoinsViewCache &inputs, CTxUndo &txundo, int nHeight)
 {
     bool ret;
     // mark inputs spent
@@ -1494,7 +1494,7 @@ void UpdateCoins(const CTransaction& tx, CValidationState &state, CCoinsViewCach
     }
 
     // add outputs
-    ret = inputs.SetCoins(txhash, CCoins(tx, nHeight));
+    ret = inputs.SetCoins(tx.GetHash(), CCoins(tx, nHeight));
     assert(ret);
 }
 
@@ -1767,8 +1767,8 @@ bool ConnectBlock(CBlock& block, CValidationState& state, CBlockIndex* pindex, C
                           !((pindex->nHeight==91842 && pindex->GetBlockHash() == uint256("0x00000000000a4d0a398161ffc163c503763b1f4360639393e0e4c8e300e0caec")) ||
                            (pindex->nHeight==91880 && pindex->GetBlockHash() == uint256("0x00000000000743f190a18c5577a3c2d2a1f610ae9601ac046a38084ccb7cd721")));
     if (fEnforceBIP30) {
-        for (unsigned int i = 0; i < block.vtx.size(); i++) {
-            uint256 hash = block.GetTxHash(i);
+        BOOST_FOREACH(const CTransaction& tx, block.vtx) {
+            const uint256& hash = tx.GetHash();
             if (view.HaveCoins(hash) && !view.GetCoins(hash).IsPruned())
                 return state.DoS(100, error("ConnectBlock() : tried to overwrite transaction"),
                                  REJECT_INVALID, "bad-txns-BIP30");
@@ -1829,11 +1829,11 @@ bool ConnectBlock(CBlock& block, CValidationState& state, CBlockIndex* pindex, C
         }
 
         CTxUndo txundo;
-        UpdateCoins(tx, state, view, txundo, pindex->nHeight, block.GetTxHash(i));
+        UpdateCoins(tx, state, view, txundo, pindex->nHeight);
         if (!tx.IsCoinBase())
             blockundo.vtxundo.push_back(txundo);
 
-        vPos.push_back(std::make_pair(block.GetTxHash(i), pos));
+        vPos.push_back(std::make_pair(tx.GetHash(), pos));
         pos.nTxOffset += ::GetSerializeSize(tx, SER_DISK, CLIENT_VERSION);
     }
     int64_t nTime = GetTimeMicros() - nStart;
@@ -1892,13 +1892,13 @@ bool ConnectBlock(CBlock& block, CValidationState& state, CBlockIndex* pindex, C
     assert(ret);
 
     // Watch for transactions paying to me
-    for (unsigned int i = 0; i < block.vtx.size(); i++)
-        g_signals.SyncTransaction(block.GetTxHash(i), block.vtx[i], &block);
+    BOOST_FOREACH(const CTransaction& tx, block.vtx)
+        g_signals.SyncTransaction(tx, &block);
 
     // Watch for changes to the previous coinbase transaction.
     static uint256 hashPrevBestCoinBase;
     g_signals.UpdatedTransaction(hashPrevBestCoinBase);
-    hashPrevBestCoinBase = block.GetTxHash(0);
+    hashPrevBestCoinBase = block.vtx[0].GetHash();
 
     return true;
 }
@@ -1996,7 +1996,7 @@ bool static DisconnectTip(CValidationState &state) {
     // Let wallets know transactions went from 1-confirmed to
     // 0-confirmed or conflicted:
     BOOST_FOREACH(const CTransaction &tx, block.vtx) {
-        SyncWithWallets(tx.GetHash(), tx, NULL);
+        SyncWithWallets(tx, NULL);
     }
     return true;
 }
@@ -2036,11 +2036,11 @@ bool static ConnectTip(CValidationState &state, CBlockIndex *pindexNew) {
     // Tell wallet about transactions that went from mempool
     // to conflicted:
     BOOST_FOREACH(const CTransaction &tx, txConflicted) {
-        SyncWithWallets(tx.GetHash(), tx, NULL);
+        SyncWithWallets(tx, NULL);
     }
     // ... and about transactions that got confirmed:
     BOOST_FOREACH(const CTransaction &tx, block.vtx) {
-        SyncWithWallets(tx.GetHash(), tx, &block);
+        SyncWithWallets(tx, &block);
     }
     return true;
 }
@@ -2381,16 +2381,11 @@ bool CheckBlock(const CBlock& block, CValidationState& state, bool fCheckPOW, bo
         if (!CheckTransaction(tx, state))
             return error("CheckBlock() : CheckTransaction failed");
 
-    // Build the merkle tree already. We need it anyway later, and it makes the
-    // block cache the transaction hashes, which means they don't need to be
-    // recalculated many times during this block's validation.
-    block.BuildMerkleTree();
-
     // Check for duplicate txids. This is caught by ConnectInputs(),
     // but catching it earlier avoids a potential DoS attack:
     set<uint256> uniqueTx;
-    for (unsigned int i = 0; i < block.vtx.size(); i++) {
-        uniqueTx.insert(block.GetTxHash(i));
+    BOOST_FOREACH(const CTransaction &tx, block.vtx) {
+        uniqueTx.insert(tx.GetHash());
     }
     if (uniqueTx.size() != block.vtx.size())
         return state.DoS(100, error("CheckBlock() : duplicate transaction"),
@@ -2406,7 +2401,7 @@ bool CheckBlock(const CBlock& block, CValidationState& state, bool fCheckPOW, bo
                          REJECT_INVALID, "bad-blk-sigops", true);
 
     // Check merkle root
-    if (fCheckMerkleRoot && block.hashMerkleRoot != block.vMerkleTree.back())
+    if (fCheckMerkleRoot && block.hashMerkleRoot != block.BuildMerkleTree())
         return state.DoS(100, error("CheckBlock() : hashMerkleRoot mismatch"),
                          REJECT_INVALID, "bad-txnmrklroot", true);
 
@@ -2682,8 +2677,8 @@ CMerkleBlock::CMerkleBlock(const CBlock& block, CBloomFilter& filter)
 
     for (unsigned int i = 0; i < block.vtx.size(); i++)
     {
-        uint256 hash = block.vtx[i].GetHash();
-        if (filter.IsRelevantAndUpdate(block.vtx[i], hash))
+        const uint256& hash = block.vtx[i].GetHash();
+        if (filter.IsRelevantAndUpdate(block.vtx[i]))
         {
             vMatch.push_back(true);
             vMatchedTxn.push_back(make_pair(i, hash));
@@ -3832,7 +3827,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
         if (AcceptToMemoryPool(mempool, state, tx, true, &fMissingInputs))
         {
             mempool.check(pcoinsTip);
-            RelayTransaction(tx, inv.hash);
+            RelayTransaction(tx);
             mapAlreadyAskedFor.erase(inv);
             vWorkQueue.push_back(inv.hash);
             vEraseQueue.push_back(inv.hash);
@@ -3862,7 +3857,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
                     if (AcceptToMemoryPool(mempool, stateDummy, orphanTx, true, &fMissingInputs2))
                     {
                         LogPrint("mempool", "   accepted orphan tx %s\n", orphanHash.ToString());
-                        RelayTransaction(orphanTx, orphanHash);
+                        RelayTransaction(orphanTx);
                         mapAlreadyAskedFor.erase(CInv(MSG_TX, orphanHash));
                         vWorkQueue.push_back(orphanHash);
                         vEraseQueue.push_back(orphanHash);
@@ -3947,7 +3942,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
             CTransaction tx;
             bool fInMemPool = mempool.lookup(hash, tx);
             if (!fInMemPool) continue; // another thread removed since queryHashes, maybe...
-            if ((pfrom->pfilter && pfrom->pfilter->IsRelevantAndUpdate(tx, hash)) ||
+            if ((pfrom->pfilter && pfrom->pfilter->IsRelevantAndUpdate(tx)) ||
                (!pfrom->pfilter))
                 vInv.push_back(inv);
             if (vInv.size() == MAX_INV_SZ) {
diff --git a/src/main.h b/src/main.h
index 5a0aedcde1..7071f0094f 100644
--- a/src/main.h
+++ b/src/main.h
@@ -113,7 +113,7 @@ void UnregisterWallet(CWalletInterface* pwalletIn);
 /** Unregister all wallets from core */
 void UnregisterAllWallets();
 /** Push an updated transaction to all registered wallets */
-void SyncWithWallets(const uint256 &hash, const CTransaction& tx, const CBlock* pblock = NULL);
+void SyncWithWallets(const CTransaction& tx, const CBlock* pblock = NULL);
 
 /** Register with a network node to receive its signals */
 void RegisterNodeSignals(CNodeSignals& nodeSignals);
@@ -294,7 +294,7 @@ bool CheckInputs(const CTransaction& tx, CValidationState &state, CCoinsViewCach
                  std::vector<CScriptCheck> *pvChecks = NULL);
 
 // Apply the effects of this transaction on the UTXO set represented by view
-void UpdateCoins(const CTransaction& tx, CValidationState &state, CCoinsViewCache &inputs, CTxUndo &txundo, int nHeight, const uint256 &txhash);
+void UpdateCoins(const CTransaction& tx, CValidationState &state, CCoinsViewCache &inputs, CTxUndo &txundo, int nHeight);
 
 // Context-independent validity checks
 bool CheckTransaction(const CTransaction& tx, CValidationState& state);
@@ -1129,7 +1129,7 @@ public:
 
 class CWalletInterface {
 protected:
-    virtual void SyncTransaction(const uint256 &hash, const CTransaction &tx, const CBlock *pblock) =0;
+    virtual void SyncTransaction(const CTransaction &tx, const CBlock *pblock) =0;
     virtual void EraseFromWallet(const uint256 &hash) =0;
     virtual void SetBestChain(const CBlockLocator &locator) =0;
     virtual void UpdatedTransaction(const uint256 &hash) =0;
diff --git a/src/miner.cpp b/src/miner.cpp
index 37cdc7d840..63ce125067 100644
--- a/src/miner.cpp
+++ b/src/miner.cpp
@@ -254,8 +254,8 @@ CBlockTemplate* CreateNewBlock(const CScript& scriptPubKeyIn)
                 continue;
 
             CTxUndo txundo;
-            uint256 hash = tx.GetHash();
-            UpdateCoins(tx, state, view, txundo, pindexPrev->nHeight+1, hash);
+            const uint256& hash = tx.GetHash();
+            UpdateCoins(tx, state, view, txundo, pindexPrev->nHeight+1);
 
             // Added
             pblock->vtx.push_back(tx);
diff --git a/src/net.cpp b/src/net.cpp
index 757a06aaed..fe6b07aa94 100644
--- a/src/net.cpp
+++ b/src/net.cpp
@@ -1808,17 +1808,17 @@ instance_of_cnetcleanup;
 
 
 
-void RelayTransaction(const CTransaction& tx, const uint256& hash)
+void RelayTransaction(const CTransaction& tx)
 {
     CDataStream ss(SER_NETWORK, PROTOCOL_VERSION);
     ss.reserve(10000);
     ss << tx;
-    RelayTransaction(tx, hash, ss);
+    RelayTransaction(tx, ss);
 }
 
-void RelayTransaction(const CTransaction& tx, const uint256& hash, const CDataStream& ss)
+void RelayTransaction(const CTransaction& tx, const CDataStream& ss)
 {
-    CInv inv(MSG_TX, hash);
+    CInv inv(MSG_TX, tx.GetHash());
     {
         LOCK(cs_mapRelay);
         // Expire old relay messages
@@ -1840,7 +1840,7 @@ void RelayTransaction(const CTransaction& tx, const uint256& hash, const CDataSt
         LOCK(pnode->cs_filter);
         if (pnode->pfilter)
         {
-            if (pnode->pfilter->IsRelevantAndUpdate(tx, hash))
+            if (pnode->pfilter->IsRelevantAndUpdate(tx))
                 pnode->PushInventory(inv);
         } else
             pnode->PushInventory(inv);
diff --git a/src/net.h b/src/net.h
index 14d578a72a..eec92f340c 100644
--- a/src/net.h
+++ b/src/net.h
@@ -726,8 +726,8 @@ public:
 
 
 class CTransaction;
-void RelayTransaction(const CTransaction& tx, const uint256& hash);
-void RelayTransaction(const CTransaction& tx, const uint256& hash, const CDataStream& ss);
+void RelayTransaction(const CTransaction& tx);
+void RelayTransaction(const CTransaction& tx, const CDataStream& ss);
 
 /** Access to the (IP) address database (peers.dat) */
 class CAddrDB
diff --git a/src/rpcrawtransaction.cpp b/src/rpcrawtransaction.cpp
index 1b5d494beb..9771f8e685 100644
--- a/src/rpcrawtransaction.cpp
+++ b/src/rpcrawtransaction.cpp
@@ -770,7 +770,7 @@ Value sendrawtransaction(const Array& params, bool fHelp)
     catch (std::exception &e) {
         throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "TX decode failed");
     }
-    uint256 hashTx = tx.GetHash();
+    const uint256 &hashTx = tx.GetHash();
 
     CCoinsViewCache &view = *pcoinsTip;
     CCoins existingCoins;
@@ -780,7 +780,7 @@ Value sendrawtransaction(const Array& params, bool fHelp)
         // push to local node and sync with wallets
         CValidationState state;
         if (AcceptToMemoryPool(mempool, state, tx, false, NULL, !fOverrideFees))
-            SyncWithWallets(hashTx, tx, NULL);
+            SyncWithWallets(tx, NULL);
         else {
             if(state.IsInvalid())
                 throw JSONRPCError(RPC_TRANSACTION_REJECTED, strprintf("%i: %s", state.GetRejectCode(), state.GetRejectReason()));
@@ -790,7 +790,7 @@ Value sendrawtransaction(const Array& params, bool fHelp)
     } else if (fHaveChain) {
         throw JSONRPCError(RPC_TRANSACTION_ALREADY_IN_CHAIN, "transaction already in block chain");
     }
-    RelayTransaction(tx, hashTx);
+    RelayTransaction(tx);
 
     return hashTx.GetHex();
 }
diff --git a/src/test/bloom_tests.cpp b/src/test/bloom_tests.cpp
index abedd3093c..b56d998be2 100644
--- a/src/test/bloom_tests.cpp
+++ b/src/test/bloom_tests.cpp
@@ -118,33 +118,33 @@ BOOST_AUTO_TEST_CASE(bloom_match)
 
     CBloomFilter filter(10, 0.000001, 0, BLOOM_UPDATE_ALL);
     filter.insert(uint256("0xb4749f017444b051c44dfd2720e88f314ff94f3dd6d56d40ef65854fcd7fff6b"));
-    BOOST_CHECK_MESSAGE(filter.IsRelevantAndUpdate(tx, tx.GetHash()), "Simple Bloom filter didn't match tx hash");
+    BOOST_CHECK_MESSAGE(filter.IsRelevantAndUpdate(tx), "Simple Bloom filter didn't match tx hash");
 
     filter = CBloomFilter(10, 0.000001, 0, BLOOM_UPDATE_ALL);
     // byte-reversed tx hash
     filter.insert(ParseHex("6bff7fcd4f8565ef406dd5d63d4ff94f318fe82027fd4dc451b04474019f74b4"));
-    BOOST_CHECK_MESSAGE(filter.IsRelevantAndUpdate(tx, tx.GetHash()), "Simple Bloom filter didn't match manually serialized tx hash");
+    BOOST_CHECK_MESSAGE(filter.IsRelevantAndUpdate(tx), "Simple Bloom filter didn't match manually serialized tx hash");
 
     filter = CBloomFilter(10, 0.000001, 0, BLOOM_UPDATE_ALL);
     filter.insert(ParseHex("30450220070aca44506c5cef3a16ed519d7c3c39f8aab192c4e1c90d065f37b8a4af6141022100a8e160b856c2d43d27d8fba71e5aef6405b8643ac4cb7cb3c462aced7f14711a01"));
-    BOOST_CHECK_MESSAGE(filter.IsRelevantAndUpdate(tx, tx.GetHash()), "Simple Bloom filter didn't match input signature");
+    BOOST_CHECK_MESSAGE(filter.IsRelevantAndUpdate(tx), "Simple Bloom filter didn't match input signature");
 
     filter = CBloomFilter(10, 0.000001, 0, BLOOM_UPDATE_ALL);
     filter.insert(ParseHex("046d11fee51b0e60666d5049a9101a72741df480b96ee26488a4d3466b95c9a40ac5eeef87e10a5cd336c19a84565f80fa6c547957b7700ff4dfbdefe76036c339"));
-    BOOST_CHECK_MESSAGE(filter.IsRelevantAndUpdate(tx, tx.GetHash()), "Simple Bloom filter didn't match input pub key");
+    BOOST_CHECK_MESSAGE(filter.IsRelevantAndUpdate(tx), "Simple Bloom filter didn't match input pub key");
 
     filter = CBloomFilter(10, 0.000001, 0, BLOOM_UPDATE_ALL);
     filter.insert(ParseHex("04943fdd508053c75000106d3bc6e2754dbcff19"));
-    BOOST_CHECK_MESSAGE(filter.IsRelevantAndUpdate(tx, tx.GetHash()), "Simple Bloom filter didn't match output address");
-    BOOST_CHECK_MESSAGE(filter.IsRelevantAndUpdate(spendingTx, spendingTx.GetHash()), "Simple Bloom filter didn't add output");
+    BOOST_CHECK_MESSAGE(filter.IsRelevantAndUpdate(tx), "Simple Bloom filter didn't match output address");
+    BOOST_CHECK_MESSAGE(filter.IsRelevantAndUpdate(spendingTx), "Simple Bloom filter didn't add output");
 
     filter = CBloomFilter(10, 0.000001, 0, BLOOM_UPDATE_ALL);
     filter.insert(ParseHex("a266436d2965547608b9e15d9032a7b9d64fa431"));
-    BOOST_CHECK_MESSAGE(filter.IsRelevantAndUpdate(tx, tx.GetHash()), "Simple Bloom filter didn't match output address");
+    BOOST_CHECK_MESSAGE(filter.IsRelevantAndUpdate(tx), "Simple Bloom filter didn't match output address");
 
     filter = CBloomFilter(10, 0.000001, 0, BLOOM_UPDATE_ALL);
     filter.insert(COutPoint(uint256("0x90c122d70786e899529d71dbeba91ba216982fb6ba58f3bdaab65e73b7e9260b"), 0));
-    BOOST_CHECK_MESSAGE(filter.IsRelevantAndUpdate(tx, tx.GetHash()), "Simple Bloom filter didn't match COutPoint");
+    BOOST_CHECK_MESSAGE(filter.IsRelevantAndUpdate(tx), "Simple Bloom filter didn't match COutPoint");
 
     filter = CBloomFilter(10, 0.000001, 0, BLOOM_UPDATE_ALL);
     COutPoint prevOutPoint(uint256("0x90c122d70786e899529d71dbeba91ba216982fb6ba58f3bdaab65e73b7e9260b"), 0);
@@ -154,23 +154,23 @@ BOOST_AUTO_TEST_CASE(bloom_match)
         memcpy(&data[32], &prevOutPoint.n, sizeof(unsigned int));
         filter.insert(data);
     }
-    BOOST_CHECK_MESSAGE(filter.IsRelevantAndUpdate(tx, tx.GetHash()), "Simple Bloom filter didn't match manually serialized COutPoint");
+    BOOST_CHECK_MESSAGE(filter.IsRelevantAndUpdate(tx), "Simple Bloom filter didn't match manually serialized COutPoint");
 
     filter = CBloomFilter(10, 0.000001, 0, BLOOM_UPDATE_ALL);
     filter.insert(uint256("00000009e784f32f62ef849763d4f45b98e07ba658647343b915ff832b110436"));
-    BOOST_CHECK_MESSAGE(!filter.IsRelevantAndUpdate(tx, tx.GetHash()), "Simple Bloom filter matched random tx hash");
+    BOOST_CHECK_MESSAGE(!filter.IsRelevantAndUpdate(tx), "Simple Bloom filter matched random tx hash");
 
     filter = CBloomFilter(10, 0.000001, 0, BLOOM_UPDATE_ALL);
     filter.insert(ParseHex("0000006d2965547608b9e15d9032a7b9d64fa431"));
-    BOOST_CHECK_MESSAGE(!filter.IsRelevantAndUpdate(tx, tx.GetHash()), "Simple Bloom filter matched random address");
+    BOOST_CHECK_MESSAGE(!filter.IsRelevantAndUpdate(tx), "Simple Bloom filter matched random address");
 
     filter = CBloomFilter(10, 0.000001, 0, BLOOM_UPDATE_ALL);
     filter.insert(COutPoint(uint256("0x90c122d70786e899529d71dbeba91ba216982fb6ba58f3bdaab65e73b7e9260b"), 1));
-    BOOST_CHECK_MESSAGE(!filter.IsRelevantAndUpdate(tx, tx.GetHash()), "Simple Bloom filter matched COutPoint for an output we didn't care about");
+    BOOST_CHECK_MESSAGE(!filter.IsRelevantAndUpdate(tx), "Simple Bloom filter matched COutPoint for an output we didn't care about");
 
     filter = CBloomFilter(10, 0.000001, 0, BLOOM_UPDATE_ALL);
     filter.insert(COutPoint(uint256("0x000000d70786e899529d71dbeba91ba216982fb6ba58f3bdaab65e73b7e9260b"), 0));
-    BOOST_CHECK_MESSAGE(!filter.IsRelevantAndUpdate(tx, tx.GetHash()), "Simple Bloom filter matched COutPoint for an output we didn't care about");
+    BOOST_CHECK_MESSAGE(!filter.IsRelevantAndUpdate(tx), "Simple Bloom filter matched COutPoint for an output we didn't care about");
 }
 
 BOOST_AUTO_TEST_CASE(merkle_block_1)
diff --git a/src/wallet.cpp b/src/wallet.cpp
index 0e0a0e87d3..7664d6c25c 100644
--- a/src/wallet.cpp
+++ b/src/wallet.cpp
@@ -603,11 +603,11 @@ bool CWallet::AddToWallet(const CWalletTx& wtxIn, bool fFromLoadWallet)
 // Add a transaction to the wallet, or update it.
 // pblock is optional, but should be provided if the transaction is known to be in a block.
 // If fUpdate is true, existing transactions will be updated.
-bool CWallet::AddToWalletIfInvolvingMe(const uint256 &hash, const CTransaction& tx, const CBlock* pblock, bool fUpdate)
+bool CWallet::AddToWalletIfInvolvingMe(const CTransaction& tx, const CBlock* pblock, bool fUpdate)
 {
     {
         AssertLockHeld(cs_wallet);
-        bool fExisted = mapWallet.count(hash);
+        bool fExisted = mapWallet.count(tx.GetHash());
         if (fExisted && !fUpdate) return false;
         if (fExisted || IsMine(tx) || IsFromMe(tx))
         {
@@ -621,10 +621,10 @@ bool CWallet::AddToWalletIfInvolvingMe(const uint256 &hash, const CTransaction&
     return false;
 }
 
-void CWallet::SyncTransaction(const uint256 &hash, const CTransaction& tx, const CBlock* pblock)
+void CWallet::SyncTransaction(const CTransaction& tx, const CBlock* pblock)
 {
     LOCK2(cs_main, cs_wallet);
-    if (!AddToWalletIfInvolvingMe(hash, tx, pblock, true))
+    if (!AddToWalletIfInvolvingMe(tx, pblock, true))
         return; // Not one of ours
 
     // If a transaction changes 'conflicted' state, that changes the balance
@@ -870,7 +870,7 @@ int CWallet::ScanForWalletTransactions(CBlockIndex* pindexStart, bool fUpdate)
             ReadBlockFromDisk(block, pindex);
             BOOST_FOREACH(CTransaction& tx, block.vtx)
             {
-                if (AddToWalletIfInvolvingMe(tx.GetHash(), tx, &block, fUpdate))
+                if (AddToWalletIfInvolvingMe(tx, &block, fUpdate))
                     ret++;
             }
             pindex = chainActive.Next(pindex);
@@ -909,9 +909,8 @@ void CWalletTx::RelayWalletTransaction()
     if (!IsCoinBase())
     {
         if (GetDepthInMainChain() == 0) {
-            uint256 hash = GetHash();
-            LogPrintf("Relaying wtx %s\n", hash.ToString());
-            RelayTransaction((CTransaction)*this, hash);
+            LogPrintf("Relaying wtx %s\n", GetHash().ToString());
+            RelayTransaction((CTransaction)*this);
         }
     }
 }
diff --git a/src/wallet.h b/src/wallet.h
index 7df656fc25..424799b14e 100644
--- a/src/wallet.h
+++ b/src/wallet.h
@@ -244,8 +244,8 @@ public:
 
     void MarkDirty();
     bool AddToWallet(const CWalletTx& wtxIn, bool fFromLoadWallet=false);
-    void SyncTransaction(const uint256 &hash, const CTransaction& tx, const CBlock* pblock);
-    bool AddToWalletIfInvolvingMe(const uint256 &hash, const CTransaction& tx, const CBlock* pblock, bool fUpdate);
+    void SyncTransaction(const CTransaction& tx, const CBlock* pblock);
+    bool AddToWalletIfInvolvingMe(const CTransaction& tx, const CBlock* pblock, bool fUpdate);
     void EraseFromWallet(const uint256 &hash);
     int ScanForWalletTransactions(CBlockIndex* pindexStart, bool fUpdate = false);
     void ReacceptWalletTransactions();