1 files changed, 23 insertions, 16 deletions

diff --git a/src/txmempool.h b/src/txmempool.h
index 3e1d387975..f0e9b2e2c6 100644
--- a/src/txmempool.h
+++ b/src/txmempool.h
@@ -7,10 +7,12 @@
 #define BITCOIN_TXMEMPOOL_H
 
 #include <list>
+#include <memory>
 #include <set>
 
 #include "amount.h"
 #include "coins.h"
+#include "indirectmap.h"
 #include "primitives/transaction.h"
 #include "sync.h"
 
@@ -74,7 +76,7 @@ class CTxMemPool;
 class CTxMemPoolEntry
 {
 private:
-    CTransaction tx;
+    std::shared_ptr<const CTransaction> tx;
     CAmount nFee;              //!< Cached to avoid expensive parent-transaction lookups
     size_t nTxSize;            //!< ... and avoid recomputing tx size
     size_t nModSize;           //!< ... and modified size for priority
@@ -111,7 +113,8 @@ public:
                     unsigned int nSigOps, LockPoints lp);
     CTxMemPoolEntry(const CTxMemPoolEntry& other);
 
-    const CTransaction& GetTx() const { return this->tx; }
+    const CTransaction& GetTx() const { return *this->tx; }
+    std::shared_ptr<const CTransaction> GetSharedTx() const { return this->tx; }
     /**
      * Fast calculation of lower bound of current priority as update
      * from entry priority. Only inputs that were originally in-chain will age.
@@ -306,18 +309,19 @@ struct ancestor_score {};
 
 class CBlockPolicyEstimator;
 
-/** An inpoint - a combination of a transaction and an index n into its vin */
-class CInPoint
+/**
+ * Information about a mempool transaction.
+ */
+struct TxMempoolInfo
 {
-public:
-    const CTransaction* ptx;
-    uint32_t n;
-
-    CInPoint() { SetNull(); }
-    CInPoint(const CTransaction* ptxIn, uint32_t nIn) { ptx = ptxIn; n = nIn; }
-    void SetNull() { ptx = NULL; n = (uint32_t) -1; }
-    bool IsNull() const { return (ptx == NULL && n == (uint32_t) -1); }
-    size_t DynamicMemoryUsage() const { return 0; }
+    /** The transaction itself */
+    std::shared_ptr<const CTransaction> tx;
+
+    /** Time the transaction entered the mempool. */
+    int64_t nTime;
+
+    /** Feerate of the transaction. */
+    CFeeRate feeRate;
 };
 
 /**
@@ -477,8 +481,10 @@ private:
     void UpdateParent(txiter entry, txiter parent, bool add);
     void UpdateChild(txiter entry, txiter child, bool add);
 
+    std::vector<indexed_transaction_set::const_iterator> GetSortedDepthAndScore() const;
+
 public:
-    std::map<COutPoint, CInPoint> mapNextTx;
+    indirectmap<COutPoint, const CTransaction*> mapNextTx;
     std::map<uint256, std::pair<double, CAmount> > mapDeltas;
 
     /** Create a new CTxMemPool.
@@ -601,8 +607,9 @@ public:
         return (mapTx.count(hash) != 0);
     }
 
-    bool lookup(uint256 hash, CTransaction& result) const;
-    bool lookupFeeRate(const uint256& hash, CFeeRate& feeRate) const;
+    std::shared_ptr<const CTransaction> get(const uint256& hash) const;
+    TxMempoolInfo info(const uint256& hash) const;
+    std::vector<TxMempoolInfo> infoAll() const;
 
     /** Estimate fee rate needed to get into the next nBlocks
      *  If no answer can be given at nBlocks, return an estimate