4 files changed, 21 insertions, 2 deletions
diff --git a/src/primitives/block.cpp b/src/primitives/block.cpp
index 0e6ab4dd71..95bd2211f9 100644
--- a/src/primitives/block.cpp
+++ b/src/primitives/block.cpp
@@ -27,7 +27,7 @@ std::string CBlock::ToString() const
         vtx.size());
     for (unsigned int i = 0; i < vtx.size(); i++)
     {
-        s << "  " << vtx[i].ToString() << "\n";
+        s << "  " << vtx[i]->ToString() << "\n";
     }
     return s.str();
 }
diff --git a/src/primitives/block.h b/src/primitives/block.h
index d148aec1e0..b037fc839c 100644
--- a/src/primitives/block.h
+++ b/src/primitives/block.h
@@ -73,7 +73,7 @@ class CBlock : public CBlockHeader
 {
 public:
     // network and disk
-    std::vector<CTransaction> vtx;
+    std::vector<CTransactionRef> vtx;
 
     // memory only
     mutable bool fChecked;
diff --git a/src/primitives/transaction.cpp b/src/primitives/transaction.cpp
index 7acdac17f2..91f4d29488 100644
--- a/src/primitives/transaction.cpp
+++ b/src/primitives/transaction.cpp
@@ -78,6 +78,10 @@ CTransaction::CTransaction(const CMutableTransaction &tx) : nVersion(tx.nVersion
     UpdateHash();
 }
 
+CTransaction::CTransaction(CMutableTransaction &&tx) : nVersion(tx.nVersion), vin(std::move(tx.vin)), vout(std::move(tx.vout)), wit(std::move(tx.wit)), nLockTime(tx.nLockTime) {
+    UpdateHash();
+}
+
 CTransaction& CTransaction::operator=(const CTransaction &tx) {
     *const_cast<int*>(&nVersion) = tx.nVersion;
     *const_cast<std::vector<CTxIn>*>(&vin) = tx.vin;
diff --git a/src/primitives/transaction.h b/src/primitives/transaction.h
index 1d176e5d8c..0fa85a1519 100644
--- a/src/primitives/transaction.h
+++ b/src/primitives/transaction.h
@@ -379,6 +379,7 @@ public:
 
     /** Convert a CMutableTransaction into a CTransaction. */
     CTransaction(const CMutableTransaction &tx);
+    CTransaction(CMutableTransaction &&tx);
 
     CTransaction& operator=(const CTransaction& tx);
 
@@ -392,6 +393,9 @@ public:
         }
     }
 
+    template <typename Stream>
+    CTransaction(deserialize_type, Stream& s) : CTransaction(CMutableTransaction(deserialize, s)) {}
+
     bool IsNull() const {
         return vin.empty() && vout.empty();
     }
@@ -460,12 +464,23 @@ struct CMutableTransaction
         SerializeTransaction(*this, s, ser_action);
     }
 
+    template <typename Stream>
+    CMutableTransaction(deserialize_type, Stream& s) {
+        Unserialize(s);
+    }
+
     /** Compute the hash of this CMutableTransaction. This is computed on the
      * fly, as opposed to GetHash() in CTransaction, which uses a cached result.
      */
     uint256 GetHash() const;
 };
 
+typedef std::shared_ptr<const CTransaction> CTransactionRef;
+static inline CTransactionRef MakeTransactionRef() { return std::make_shared<const CTransaction>(); }
+template <typename Tx> static inline CTransactionRef MakeTransactionRef(Tx&& txIn) { return std::make_shared<const CTransaction>(std::forward<Tx>(txIn)); }
+static inline CTransactionRef MakeTransactionRef(const CTransactionRef& txIn) { return txIn; }
+static inline CTransactionRef MakeTransactionRef(CTransactionRef&& txIn) { return std::move(txIn); }
+
 /** Compute the weight of a transaction, as defined by BIP 141 */
 int64_t GetTransactionWeight(const CTransaction &tx);