1 files changed, 84 insertions, 0 deletions
diff --git a/src/txmempool.h b/src/txmempool.h
new file mode 100644
index 0000000000..57b92789fb
--- /dev/null
+++ b/src/txmempool.h
@@ -0,0 +1,84 @@
+// Copyright (c) 2009-2010 Satoshi Nakamoto
+// Copyright (c) 2009-2013 The Bitcoin developers
+// Distributed under the MIT/X11 software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+#ifndef BITCOIN_TXMEMPOOL_H
+#define BITCOIN_TXMEMPOOL_H
+
+#include "coins.h"
+#include "core.h"
+#include "sync.h"
+
+/** Fake height value used in CCoins to signify they are only in the memory pool (since 0.8) */
+static const unsigned int MEMPOOL_HEIGHT = 0x7FFFFFFF;
+
+/*
+ * CTxMemPool stores valid-according-to-the-current-best-chain
+ * transactions that may be included in the next block.
+ *
+ * Transactions are added when they are seen on the network
+ * (or created by the local node), but not all transactions seen
+ * are added to the pool: if a new transaction double-spends
+ * an input of a transaction in the pool, it is dropped,
+ * as are non-standard transactions.
+ */
+class CTxMemPool
+{
+private:
+    bool fSanityCheck; // Normally false, true if -checkmempool or -regtest
+    unsigned int nTransactionsUpdated;
+
+public:
+    mutable CCriticalSection cs;
+    std::map<uint256, CTransaction> mapTx;
+    std::map<COutPoint, CInPoint> mapNextTx;
+
+    CTxMemPool();
+
+    /*
+     * If sanity-checking is turned on, check makes sure the pool is
+     * consistent (does not contain two transactions that spend the same inputs,
+     * all inputs are in the mapNextTx array). If sanity-checking is turned off,
+     * check does nothing.
+     */
+    void check(CCoinsViewCache *pcoins) const;
+    void setSanityCheck(bool _fSanityCheck) { fSanityCheck = _fSanityCheck; }
+
+    bool addUnchecked(const uint256& hash, const CTransaction &tx);
+    bool remove(const CTransaction &tx, bool fRecursive = false);
+    bool removeConflicts(const CTransaction &tx);
+    void clear();
+    void queryHashes(std::vector<uint256>& vtxid);
+    void pruneSpent(const uint256& hash, CCoins &coins);
+    unsigned int GetTransactionsUpdated() const;
+    void AddTransactionsUpdated(unsigned int n);
+
+    unsigned long size()
+    {
+        LOCK(cs);
+        return mapTx.size();
+    }
+
+    bool exists(uint256 hash)
+    {
+        LOCK(cs);
+        return (mapTx.count(hash) != 0);
+    }
+
+    bool lookup(uint256 hash, CTransaction& result) const;
+};
+
+/** CCoinsView that brings transactions from a memorypool into view.
+    It does not check for spendings by memory pool transactions. */
+class CCoinsViewMemPool : public CCoinsViewBacked
+{
+protected:
+    CTxMemPool &mempool;
+
+public:
+    CCoinsViewMemPool(CCoinsView &baseIn, CTxMemPool &mempoolIn);
+    bool GetCoins(const uint256 &txid, CCoins &coins);
+    bool HaveCoins(const uint256 &txid);
+};
+
+#endif /* BITCOIN_TXMEMPOOL_H */