Get rid of nType and nVersion

Remove the nType and nVersion as parameters to all serialization methods
and functions. There is only one place where it's read and has an impact
(in CAddress), and even there it does not impact any of the recursively
invoked serializers.

Instead, the few places that need nType or nVersion are changed to read
it directly from the stream object, through GetType() and GetVersion()
methods which are added to all stream classes.

36 files changed, 304 insertions, 280 deletions

diff --git a/src/addrdb.h b/src/addrdb.h
index 62835a6fb4..339943ca5a 100644
--- a/src/addrdb.h
+++ b/src/addrdb.h
@@ -46,7 +46,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         READWRITE(this->nVersion);
         READWRITE(nCreateTime);
         READWRITE(nBanUntil);
diff --git a/src/addrman.h b/src/addrman.h
index 03b380165f..cabacbbea9 100644
--- a/src/addrman.h
+++ b/src/addrman.h
@@ -58,7 +58,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         READWRITE(*(CAddress*)this);
         READWRITE(source);
         READWRITE(nLastSuccess);
@@ -293,7 +293,7 @@ public:
      * very little in common.
      */
     template<typename Stream>
-    void Serialize(Stream &s, int nType, int nVersionDummy) const
+    void Serialize(Stream &s) const
     {
         LOCK(cs);
 
@@ -343,7 +343,7 @@ public:
     }
 
     template<typename Stream>
-    void Unserialize(Stream& s, int nType, int nVersionDummy)
+    void Unserialize(Stream& s)
     {
         LOCK(cs);
 
diff --git a/src/amount.h b/src/amount.h
index 5e52f37f23..ba0c86040f 100644
--- a/src/amount.h
+++ b/src/amount.h
@@ -64,7 +64,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         READWRITE(nSatoshisPerK);
     }
 };
diff --git a/src/blockencodings.h b/src/blockencodings.h
index 99b1cb140d..4035b87eb2 100644
--- a/src/blockencodings.h
+++ b/src/blockencodings.h
@@ -21,7 +21,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         READWRITE(tx); //TODO: Compress tx encoding
     }
 };
@@ -35,7 +35,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         READWRITE(blockhash);
         uint64_t indexes_size = (uint64_t)indexes.size();
         READWRITE(COMPACTSIZE(indexes_size));
@@ -81,7 +81,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         READWRITE(blockhash);
         uint64_t txn_size = (uint64_t)txn.size();
         READWRITE(COMPACTSIZE(txn_size));
@@ -109,7 +109,7 @@ struct PrefilledTransaction {
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         uint64_t idx = index;
         READWRITE(COMPACTSIZE(idx));
         if (idx > std::numeric_limits<uint16_t>::max())
@@ -155,7 +155,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         READWRITE(header);
         READWRITE(nonce);
 
diff --git a/src/bloom.h b/src/bloom.h
index ad6de625d8..d3a017371f 100644
--- a/src/bloom.h
+++ b/src/bloom.h
@@ -73,7 +73,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         READWRITE(vData);
         READWRITE(nHashFuncs);
         READWRITE(nTweak);
diff --git a/src/chain.h b/src/chain.h
index 46a16a3061..0aac5de5c2 100644
--- a/src/chain.h
+++ b/src/chain.h
@@ -28,7 +28,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         READWRITE(VARINT(nBlocks));
         READWRITE(VARINT(nSize));
         READWRITE(VARINT(nUndoSize));
@@ -76,7 +76,7 @@ struct CDiskBlockPos
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         READWRITE(VARINT(nFile));
         READWRITE(VARINT(nPos));
     }
@@ -357,8 +357,9 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
-        if (!(nType & SER_GETHASH))
+    inline void SerializationOp(Stream& s, Operation ser_action) {
+        int nVersion = s.GetVersion();
+        if (!(s.GetType() & SER_GETHASH))
             READWRITE(VARINT(nVersion));
 
         READWRITE(VARINT(nHeight));
diff --git a/src/coins.h b/src/coins.h
index 3e134cf675..d295b3c940 100644
--- a/src/coins.h
+++ b/src/coins.h
@@ -154,7 +154,7 @@ public:
     }
 
     template<typename Stream>
-    void Serialize(Stream &s, int nType, int nVersion) const {
+    void Serialize(Stream &s) const {
         unsigned int nMaskSize = 0, nMaskCode = 0;
         CalcMaskSize(nMaskSize, nMaskCode);
         bool fFirst = vout.size() > 0 && !vout[0].IsNull();
@@ -162,33 +162,33 @@ public:
         assert(fFirst || fSecond || nMaskCode);
         unsigned int nCode = 8*(nMaskCode - (fFirst || fSecond ? 0 : 1)) + (fCoinBase ? 1 : 0) + (fFirst ? 2 : 0) + (fSecond ? 4 : 0);
         // version
-        ::Serialize(s, VARINT(this->nVersion), nType, nVersion);
+        ::Serialize(s, VARINT(this->nVersion));
         // header code
-        ::Serialize(s, VARINT(nCode), nType, nVersion);
+        ::Serialize(s, VARINT(nCode));
         // spentness bitmask
         for (unsigned int b = 0; b<nMaskSize; b++) {
             unsigned char chAvail = 0;
             for (unsigned int i = 0; i < 8 && 2+b*8+i < vout.size(); i++)
                 if (!vout[2+b*8+i].IsNull())
                     chAvail |= (1 << i);
-            ::Serialize(s, chAvail, nType, nVersion);
+            ::Serialize(s, chAvail);
         }
         // txouts themself
         for (unsigned int i = 0; i < vout.size(); i++) {
             if (!vout[i].IsNull())
-                ::Serialize(s, CTxOutCompressor(REF(vout[i])), nType, nVersion);
+                ::Serialize(s, CTxOutCompressor(REF(vout[i])));
         }
         // coinbase height
-        ::Serialize(s, VARINT(nHeight), nType, nVersion);
+        ::Serialize(s, VARINT(nHeight));
     }
 
     template<typename Stream>
-    void Unserialize(Stream &s, int nType, int nVersion) {
+    void Unserialize(Stream &s) {
         unsigned int nCode = 0;
         // version
-        ::Unserialize(s, VARINT(this->nVersion), nType, nVersion);
+        ::Unserialize(s, VARINT(this->nVersion));
         // header code
-        ::Unserialize(s, VARINT(nCode), nType, nVersion);
+        ::Unserialize(s, VARINT(nCode));
         fCoinBase = nCode & 1;
         std::vector<bool> vAvail(2, false);
         vAvail[0] = (nCode & 2) != 0;
@@ -197,7 +197,7 @@ public:
         // spentness bitmask
         while (nMaskCode > 0) {
             unsigned char chAvail = 0;
-            ::Unserialize(s, chAvail, nType, nVersion);
+            ::Unserialize(s, chAvail);
             for (unsigned int p = 0; p < 8; p++) {
                 bool f = (chAvail & (1 << p)) != 0;
                 vAvail.push_back(f);
@@ -209,10 +209,10 @@ public:
         vout.assign(vAvail.size(), CTxOut());
         for (unsigned int i = 0; i < vAvail.size(); i++) {
             if (vAvail[i])
-                ::Unserialize(s, REF(CTxOutCompressor(vout[i])), nType, nVersion);
+                ::Unserialize(s, REF(CTxOutCompressor(vout[i])));
         }
         // coinbase height
-        ::Unserialize(s, VARINT(nHeight), nType, nVersion);
+        ::Unserialize(s, VARINT(nHeight));
         Cleanup();
     }
 
diff --git a/src/compressor.h b/src/compressor.h
index 90749499d1..961365d261 100644
--- a/src/compressor.h
+++ b/src/compressor.h
@@ -56,7 +56,7 @@ public:
     CScriptCompressor(CScript &scriptIn) : script(scriptIn) { }
 
     template<typename Stream>
-    void Serialize(Stream &s, int nType, int nVersion) const {
+    void Serialize(Stream &s) const {
         std::vector<unsigned char> compr;
         if (Compress(compr)) {
             s << CFlatData(compr);
@@ -68,7 +68,7 @@ public:
     }
 
     template<typename Stream>
-    void Unserialize(Stream &s, int nType, int nVersion) {
+    void Unserialize(Stream &s) {
         unsigned int nSize = 0;
         s >> VARINT(nSize);
         if (nSize < nSpecialScripts) {
@@ -104,7 +104,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         if (!ser_action.ForRead()) {
             uint64_t nVal = CompressAmount(txout.nValue);
             READWRITE(VARINT(nVal));
diff --git a/src/hash.h b/src/hash.h
index 73e31580d2..94e7f5ea6c 100644
--- a/src/hash.h
+++ b/src/hash.h
@@ -138,6 +138,9 @@ public:
 
     CHashWriter(int nTypeIn, int nVersionIn) : nType(nTypeIn), nVersion(nVersionIn) {}
 
+    int GetType() const { return nType; }
+    int GetVersion() const { return nVersion; }
+
     void write(const char *pch, size_t size) {
         ctx.Write((const unsigned char*)pch, size);
     }
@@ -152,7 +155,7 @@ public:
     template<typename T>
     CHashWriter& operator<<(const T& obj) {
         // Serialize to this stream
-        ::Serialize(*this, obj, nType, nVersion);
+        ::Serialize(*this, obj);
         return (*this);
     }
 };
diff --git a/src/key.h b/src/key.h
index 48a07d62c9..ff5252b7a0 100644
--- a/src/key.h
+++ b/src/key.h
@@ -162,7 +162,7 @@ struct CExtKey {
     CExtPubKey Neuter() const;
     void SetMaster(const unsigned char* seed, unsigned int nSeedLen);
     template <typename Stream>
-    void Serialize(Stream& s, int nType, int nVersion) const
+    void Serialize(Stream& s) const
     {
         unsigned int len = BIP32_EXTKEY_SIZE;
         ::WriteCompactSize(s, len);
@@ -171,7 +171,7 @@ struct CExtKey {
         s.write((const char *)&code[0], len);
     }
     template <typename Stream>
-    void Unserialize(Stream& s, int nType, int nVersion)
+    void Unserialize(Stream& s)
     {
         unsigned int len = ::ReadCompactSize(s);
         unsigned char code[BIP32_EXTKEY_SIZE];
diff --git a/src/merkleblock.h b/src/merkleblock.h
index 835cbcce55..17c33194a9 100644
--- a/src/merkleblock.h
+++ b/src/merkleblock.h
@@ -85,7 +85,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         READWRITE(nTransactions);
         READWRITE(vHash);
         std::vector<unsigned char> vBytes;
@@ -148,7 +148,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         READWRITE(header);
         READWRITE(txn);
     }
diff --git a/src/net.h b/src/net.h
index 4ceeec2f0c..8289a06d94 100644
--- a/src/net.h
+++ b/src/net.h
@@ -140,7 +140,7 @@ public:
     void PushMessageWithVersionAndFlag(CNode* pnode, int nVersion, int flag, const std::string& sCommand, Args&&... args)
     {
         auto msg(BeginMessage(pnode, nVersion, flag, sCommand));
-        ::SerializeMany(msg, msg.GetType(), msg.GetVersion(), std::forward<Args>(args)...);
+        ::SerializeMany(msg, std::forward<Args>(args)...);
         EndMessage(msg);
         PushMessage(pnode, msg, sCommand);
     }
diff --git a/src/netaddress.h b/src/netaddress.h
index 9330fe3328..9dffaa57e7 100644
--- a/src/netaddress.h
+++ b/src/netaddress.h
@@ -85,7 +85,7 @@ class CNetAddr
         ADD_SERIALIZE_METHODS;
 
         template <typename Stream, typename Operation>
-        inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+        inline void SerializationOp(Stream& s, Operation ser_action) {
             READWRITE(FLATDATA(ip));
         }
 
@@ -122,7 +122,7 @@ class CSubNet
         ADD_SERIALIZE_METHODS;
 
         template <typename Stream, typename Operation>
-        inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+        inline void SerializationOp(Stream& s, Operation ser_action) {
             READWRITE(network);
             READWRITE(FLATDATA(netmask));
             READWRITE(FLATDATA(valid));
@@ -159,7 +159,7 @@ class CService : public CNetAddr
         ADD_SERIALIZE_METHODS;
 
         template <typename Stream, typename Operation>
-        inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+        inline void SerializationOp(Stream& s, Operation ser_action) {
             READWRITE(FLATDATA(ip));
             unsigned short portN = htons(port);
             READWRITE(FLATDATA(portN));
diff --git a/src/primitives/block.h b/src/primitives/block.h
index 72dfed985a..d148aec1e0 100644
--- a/src/primitives/block.h
+++ b/src/primitives/block.h
@@ -36,7 +36,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         READWRITE(this->nVersion);
         READWRITE(hashPrevBlock);
         READWRITE(hashMerkleRoot);
@@ -92,7 +92,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         READWRITE(*(CBlockHeader*)this);
         READWRITE(vtx);
     }
@@ -137,8 +137,9 @@ struct CBlockLocator
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
-        if (!(nType & SER_GETHASH))
+    inline void SerializationOp(Stream& s, Operation ser_action) {
+        int nVersion = s.GetVersion();
+        if (!(s.GetType() & SER_GETHASH))
             READWRITE(nVersion);
         READWRITE(vHave);
     }
diff --git a/src/primitives/transaction.h b/src/primitives/transaction.h
index 714ab34548..1d176e5d8c 100644
--- a/src/primitives/transaction.h
+++ b/src/primitives/transaction.h
@@ -28,7 +28,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         READWRITE(hash);
         READWRITE(n);
     }
@@ -104,7 +104,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         READWRITE(prevout);
         READWRITE(*(CScriptBase*)(&scriptSig));
         READWRITE(nSequence);
@@ -144,7 +144,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         READWRITE(nValue);
         READWRITE(*(CScriptBase*)(&scriptPubKey));
     }
@@ -219,7 +219,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion)
+    inline void SerializationOp(Stream& s, Operation ser_action)
     {
         READWRITE(scriptWitness.stack);
     }
@@ -255,7 +255,7 @@ public:
     }
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion)
+    inline void SerializationOp(Stream& s, Operation ser_action)
     {
         for (size_t n = 0; n < vtxinwit.size(); n++) {
             READWRITE(vtxinwit[n]);
@@ -287,8 +287,8 @@ struct CMutableTransaction;
  * - uint32_t nLockTime
  */
 template<typename Stream, typename Operation, typename TxType>
-inline void SerializeTransaction(TxType& tx, Stream& s, Operation ser_action, int nType, int nVersion) {
-    const bool fAllowWitness = !(nVersion & SERIALIZE_TRANSACTION_NO_WITNESS);
+inline void SerializeTransaction(TxType& tx, Stream& s, Operation ser_action) {
+    const bool fAllowWitness = !(s.GetVersion() & SERIALIZE_TRANSACTION_NO_WITNESS);
 
     READWRITE(*const_cast<int32_t*>(&tx.nVersion));
     unsigned char flags = 0;
@@ -385,8 +385,8 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
-        SerializeTransaction(*this, s, ser_action, nType, nVersion);
+    inline void SerializationOp(Stream& s, Operation ser_action) {
+        SerializeTransaction(*this, s, ser_action);
         if (ser_action.ForRead()) {
             UpdateHash();
         }
@@ -456,8 +456,8 @@ struct CMutableTransaction
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
-        SerializeTransaction(*this, s, ser_action, nType, nVersion);
+    inline void SerializationOp(Stream& s, Operation ser_action) {
+        SerializeTransaction(*this, s, ser_action);
     }
 
     /** Compute the hash of this CMutableTransaction. This is computed on the
diff --git a/src/protocol.h b/src/protocol.h
index d19e0d3a5e..a52d9a67b0 100644
--- a/src/protocol.h
+++ b/src/protocol.h
@@ -48,7 +48,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion)
+    inline void SerializationOp(Stream& s, Operation ser_action)
     {
         READWRITE(FLATDATA(pchMessageStart));
         READWRITE(FLATDATA(pchCommand));
@@ -289,14 +289,15 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion)
+    inline void SerializationOp(Stream& s, Operation ser_action)
     {
         if (ser_action.ForRead())
             Init();
-        if (nType & SER_DISK)
+        int nVersion = s.GetVersion();
+        if (s.GetType() & SER_DISK)
             READWRITE(nVersion);
-        if ((nType & SER_DISK) ||
-            (nVersion >= CADDR_TIME_VERSION && !(nType & SER_GETHASH)))
+        if ((s.GetType() & SER_DISK) ||
+            (nVersion >= CADDR_TIME_VERSION && !(s.GetType() & SER_GETHASH)))
             READWRITE(nTime);
         uint64_t nServicesInt = nServices;
         READWRITE(nServicesInt);
@@ -343,7 +344,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion)
+    inline void SerializationOp(Stream& s, Operation ser_action)
     {
         READWRITE(type);
         READWRITE(hash);
diff --git a/src/pubkey.h b/src/pubkey.h
index 3277218bb6..15207f89e1 100644
--- a/src/pubkey.h
+++ b/src/pubkey.h
@@ -117,14 +117,14 @@ public:
 
     //! Implement serialization, as if this was a byte vector.
     template <typename Stream>
-    void Serialize(Stream& s, int nType, int nVersion) const
+    void Serialize(Stream& s) const
     {
         unsigned int len = size();
         ::WriteCompactSize(s, len);
         s.write((char*)vch, len);
     }
     template <typename Stream>
-    void Unserialize(Stream& s, int nType, int nVersion)
+    void Unserialize(Stream& s)
     {
         unsigned int len = ::ReadCompactSize(s);
         if (len <= 65) {
@@ -211,7 +211,7 @@ struct CExtPubKey {
     bool Derive(CExtPubKey& out, unsigned int nChild) const;
 
     template <typename Stream>
-    void Serialize(Stream& s, int nType, int nVersion) const
+    void Serialize(Stream& s) const
     {
         unsigned int len = BIP32_EXTKEY_SIZE;
         ::WriteCompactSize(s, len);
@@ -220,7 +220,7 @@ struct CExtPubKey {
         s.write((const char *)&code[0], len);
     }
     template <typename Stream>
-    void Unserialize(Stream& s, int nType, int nVersion)
+    void Unserialize(Stream& s)
     {
         unsigned int len = ::ReadCompactSize(s);
         unsigned char code[BIP32_EXTKEY_SIZE];
diff --git a/src/qt/recentrequeststablemodel.h b/src/qt/recentrequeststablemodel.h
index 0193e748d7..8ee2c9cbac 100644
--- a/src/qt/recentrequeststablemodel.h
+++ b/src/qt/recentrequeststablemodel.h
@@ -27,7 +27,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         unsigned int nDate = date.toTime_t();
 
         READWRITE(this->nVersion);
diff --git a/src/qt/walletmodel.h b/src/qt/walletmodel.h
index 6a5670e378..eedf6e8cea 100644
--- a/src/qt/walletmodel.h
+++ b/src/qt/walletmodel.h
@@ -65,7 +65,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         std::string sAddress = address.toStdString();
         std::string sLabel = label.toStdString();
         std::string sMessage = message.toStdString();
diff --git a/src/rest.cpp b/src/rest.cpp
index b8b5420626..90cca6f480 100644
--- a/src/rest.cpp
+++ b/src/rest.cpp
@@ -50,7 +50,7 @@ struct CCoin {
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion)
+    inline void SerializationOp(Stream& s, Operation ser_action)
     {
         READWRITE(nTxVer);
         READWRITE(nHeight);
diff --git a/src/script/bitcoinconsensus.cpp b/src/script/bitcoinconsensus.cpp
index ec573c3183..069ac55bfb 100644
--- a/src/script/bitcoinconsensus.cpp
+++ b/src/script/bitcoinconsensus.cpp
@@ -42,10 +42,12 @@ public:
     template<typename T>
     TxInputStream& operator>>(T& obj)
     {
-        ::Unserialize(*this, obj, m_type, m_version);
+        ::Unserialize(*this, obj);
         return *this;
     }
 
+    int GetVersion() const { return m_version; }
+    int GetType() const { return m_type; }
 private:
     const int m_type;
     const int m_version;
diff --git a/src/script/interpreter.cpp b/src/script/interpreter.cpp
index 0e17ddc130..a6403f9363 100644
--- a/src/script/interpreter.cpp
+++ b/src/script/interpreter.cpp
@@ -1069,7 +1069,7 @@ public:
 
     /** Serialize the passed scriptCode, skipping OP_CODESEPARATORs */
     template<typename S>
-    void SerializeScriptCode(S &s, int nType, int nVersion) const {
+    void SerializeScriptCode(S &s) const {
         CScript::const_iterator it = scriptCode.begin();
         CScript::const_iterator itBegin = it;
         opcodetype opcode;
@@ -1092,53 +1092,53 @@ public:
 
     /** Serialize an input of txTo */
     template<typename S>
-    void SerializeInput(S &s, unsigned int nInput, int nType, int nVersion) const {
+    void SerializeInput(S &s, unsigned int nInput) const {
         // In case of SIGHASH_ANYONECANPAY, only the input being signed is serialized
         if (fAnyoneCanPay)
             nInput = nIn;
         // Serialize the prevout
-        ::Serialize(s, txTo.vin[nInput].prevout, nType, nVersion);
+        ::Serialize(s, txTo.vin[nInput].prevout);
         // Serialize the script
         if (nInput != nIn)
             // Blank out other inputs' signatures
-            ::Serialize(s, CScriptBase(), nType, nVersion);
+            ::Serialize(s, CScriptBase());
         else
-            SerializeScriptCode(s, nType, nVersion);
+            SerializeScriptCode(s);
         // Serialize the nSequence
         if (nInput != nIn && (fHashSingle || fHashNone))
             // let the others update at will
-            ::Serialize(s, (int)0, nType, nVersion);
+            ::Serialize(s, (int)0);
         else
-            ::Serialize(s, txTo.vin[nInput].nSequence, nType, nVersion);
+            ::Serialize(s, txTo.vin[nInput].nSequence);
     }
 
     /** Serialize an output of txTo */
     template<typename S>
-    void SerializeOutput(S &s, unsigned int nOutput, int nType, int nVersion) const {
+    void SerializeOutput(S &s, unsigned int nOutput) const {
         if (fHashSingle && nOutput != nIn)
             // Do not lock-in the txout payee at other indices as txin
-            ::Serialize(s, CTxOut(), nType, nVersion);
+            ::Serialize(s, CTxOut());
         else
-            ::Serialize(s, txTo.vout[nOutput], nType, nVersion);
+            ::Serialize(s, txTo.vout[nOutput]);
     }
 
     /** Serialize txTo */
     template<typename S>
-    void Serialize(S &s, int nType, int nVersion) const {
+    void Serialize(S &s) const {
         // Serialize nVersion
-        ::Serialize(s, txTo.nVersion, nType, nVersion);
+        ::Serialize(s, txTo.nVersion);
         // Serialize vin
         unsigned int nInputs = fAnyoneCanPay ? 1 : txTo.vin.size();
         ::WriteCompactSize(s, nInputs);
         for (unsigned int nInput = 0; nInput < nInputs; nInput++)
-             SerializeInput(s, nInput, nType, nVersion);
+             SerializeInput(s, nInput);
         // Serialize vout
         unsigned int nOutputs = fHashNone ? 0 : (fHashSingle ? nIn+1 : txTo.vout.size());
         ::WriteCompactSize(s, nOutputs);
         for (unsigned int nOutput = 0; nOutput < nOutputs; nOutput++)
-             SerializeOutput(s, nOutput, nType, nVersion);
+             SerializeOutput(s, nOutput);
         // Serialize nLockTime
-        ::Serialize(s, txTo.nLockTime, nType, nVersion);
+        ::Serialize(s, txTo.nLockTime);
     }
 };
 
diff --git a/src/serialize.h b/src/serialize.h
index 80289a365a..fc4291fe95 100644
--- a/src/serialize.h
+++ b/src/serialize.h
@@ -159,8 +159,8 @@ enum
     SER_GETHASH         = (1 << 2),
 };
 
-#define READWRITE(obj)      (::SerReadWrite(s, (obj), nType, nVersion, ser_action))
-#define READWRITEMANY(...)      (::SerReadWriteMany(s, nType, nVersion, ser_action, __VA_ARGS__))
+#define READWRITE(obj)      (::SerReadWrite(s, (obj), ser_action))
+#define READWRITEMANY(...)      (::SerReadWriteMany(s, ser_action, __VA_ARGS__))
 
 /** 
  * Implement three methods for serializable objects. These are actually wrappers over
@@ -168,45 +168,42 @@ enum
  * code. Adding "ADD_SERIALIZE_METHODS" in the body of the class causes these wrappers to be
  * added as members. 
  */
-#define ADD_SERIALIZE_METHODS                                                          \
-    template<typename Stream>                                                        \
-    void Serialize(Stream& s, int nType, int nVersion) const {                       \
-        NCONST_PTR(this)->SerializationOp(s, CSerActionSerialize(), nType, nVersion);\
-    }                                                                                \
-    template<typename Stream>                                                        \
-    void Unserialize(Stream& s, int nType, int nVersion) {                           \
-        SerializationOp(s, CSerActionUnserialize(), nType, nVersion);                \
+#define ADD_SERIALIZE_METHODS                                         \
+    template<typename Stream>                                         \
+    void Serialize(Stream& s) const {                                 \
+        NCONST_PTR(this)->SerializationOp(s, CSerActionSerialize());  \
+    }                                                                 \
+    template<typename Stream>                                         \
+    void Unserialize(Stream& s) {                                     \
+        SerializationOp(s, CSerActionUnserialize());                  \
     }
 
-/*
- * Basic Types
- */
-template<typename Stream> inline void Serialize(Stream& s, char a,         int, int=0) { ser_writedata8(s, a); } // TODO Get rid of bare char
-template<typename Stream> inline void Serialize(Stream& s, int8_t a,       int, int=0) { ser_writedata8(s, a); }
-template<typename Stream> inline void Serialize(Stream& s, uint8_t a,      int, int=0) { ser_writedata8(s, a); }
-template<typename Stream> inline void Serialize(Stream& s, int16_t a,      int, int=0) { ser_writedata16(s, a); }
-template<typename Stream> inline void Serialize(Stream& s, uint16_t a,     int, int=0) { ser_writedata16(s, a); }
-template<typename Stream> inline void Serialize(Stream& s, int32_t a,      int, int=0) { ser_writedata32(s, a); }
-template<typename Stream> inline void Serialize(Stream& s, uint32_t a,     int, int=0) { ser_writedata32(s, a); }
-template<typename Stream> inline void Serialize(Stream& s, int64_t a,      int, int=0) { ser_writedata64(s, a); }
-template<typename Stream> inline void Serialize(Stream& s, uint64_t a,     int, int=0) { ser_writedata64(s, a); }
-template<typename Stream> inline void Serialize(Stream& s, float a,        int, int=0) { ser_writedata32(s, ser_float_to_uint32(a)); }
-template<typename Stream> inline void Serialize(Stream& s, double a,       int, int=0) { ser_writedata64(s, ser_double_to_uint64(a)); }
+template<typename Stream> inline void Serialize(Stream& s, char a    ) { ser_writedata8(s, a); } // TODO Get rid of bare char
+template<typename Stream> inline void Serialize(Stream& s, int8_t a  ) { ser_writedata8(s, a); }
+template<typename Stream> inline void Serialize(Stream& s, uint8_t a ) { ser_writedata8(s, a); }
+template<typename Stream> inline void Serialize(Stream& s, int16_t a ) { ser_writedata16(s, a); }
+template<typename Stream> inline void Serialize(Stream& s, uint16_t a) { ser_writedata16(s, a); }
+template<typename Stream> inline void Serialize(Stream& s, int32_t a ) { ser_writedata32(s, a); }
+template<typename Stream> inline void Serialize(Stream& s, uint32_t a) { ser_writedata32(s, a); }
+template<typename Stream> inline void Serialize(Stream& s, int64_t a ) { ser_writedata64(s, a); }
+template<typename Stream> inline void Serialize(Stream& s, uint64_t a) { ser_writedata64(s, a); }
+template<typename Stream> inline void Serialize(Stream& s, float a   ) { ser_writedata32(s, ser_float_to_uint32(a)); }
+template<typename Stream> inline void Serialize(Stream& s, double a  ) { ser_writedata64(s, ser_double_to_uint64(a)); }
 
-template<typename Stream> inline void Unserialize(Stream& s, char& a,      int, int=0) { a = ser_readdata8(s); } // TODO Get rid of bare char
-template<typename Stream> inline void Unserialize(Stream& s, int8_t& a,    int, int=0) { a = ser_readdata8(s); }
-template<typename Stream> inline void Unserialize(Stream& s, uint8_t& a,   int, int=0) { a = ser_readdata8(s); }
-template<typename Stream> inline void Unserialize(Stream& s, int16_t& a,   int, int=0) { a = ser_readdata16(s); }
-template<typename Stream> inline void Unserialize(Stream& s, uint16_t& a,  int, int=0) { a = ser_readdata16(s); }
-template<typename Stream> inline void Unserialize(Stream& s, int32_t& a,   int, int=0) { a = ser_readdata32(s); }
-template<typename Stream> inline void Unserialize(Stream& s, uint32_t& a,  int, int=0) { a = ser_readdata32(s); }
-template<typename Stream> inline void Unserialize(Stream& s, int64_t& a,   int, int=0) { a = ser_readdata64(s); }
-template<typename Stream> inline void Unserialize(Stream& s, uint64_t& a,  int, int=0) { a = ser_readdata64(s); }
-template<typename Stream> inline void Unserialize(Stream& s, float& a,     int, int=0) { a = ser_uint32_to_float(ser_readdata32(s)); }
-template<typename Stream> inline void Unserialize(Stream& s, double& a,    int, int=0) { a = ser_uint64_to_double(ser_readdata64(s)); }
+template<typename Stream> inline void Unserialize(Stream& s, char& a    ) { a = ser_readdata8(s); } // TODO Get rid of bare char
+template<typename Stream> inline void Unserialize(Stream& s, int8_t& a  ) { a = ser_readdata8(s); }
+template<typename Stream> inline void Unserialize(Stream& s, uint8_t& a ) { a = ser_readdata8(s); }
+template<typename Stream> inline void Unserialize(Stream& s, int16_t& a ) { a = ser_readdata16(s); }
+template<typename Stream> inline void Unserialize(Stream& s, uint16_t& a) { a = ser_readdata16(s); }
+template<typename Stream> inline void Unserialize(Stream& s, int32_t& a ) { a = ser_readdata32(s); }
+template<typename Stream> inline void Unserialize(Stream& s, uint32_t& a) { a = ser_readdata32(s); }
+template<typename Stream> inline void Unserialize(Stream& s, int64_t& a ) { a = ser_readdata64(s); }
+template<typename Stream> inline void Unserialize(Stream& s, uint64_t& a) { a = ser_readdata64(s); }
+template<typename Stream> inline void Unserialize(Stream& s, float& a   ) { a = ser_uint32_to_float(ser_readdata32(s)); }
+template<typename Stream> inline void Unserialize(Stream& s, double& a  ) { a = ser_uint64_to_double(ser_readdata64(s)); }
 
-template<typename Stream> inline void Serialize(Stream& s, bool a, int, int=0)    { char f=a; ser_writedata8(s, f); }
-template<typename Stream> inline void Unserialize(Stream& s, bool& a, int, int=0) { char f=ser_readdata8(s); a=f; }
+template<typename Stream> inline void Serialize(Stream& s, bool a)    { char f=a; ser_writedata8(s, f); }
+template<typename Stream> inline void Unserialize(Stream& s, bool& a) { char f=ser_readdata8(s); a=f; }
 
 
 
@@ -386,13 +383,13 @@ public:
     const char* end() const { return pend; }
 
     template<typename Stream>
-    void Serialize(Stream& s, int, int=0) const
+    void Serialize(Stream& s) const
     {
         s.write(pbegin, pend - pbegin);
     }
 
     template<typename Stream>
-    void Unserialize(Stream& s, int, int=0)
+    void Unserialize(Stream& s)
     {
         s.read(pbegin, pend - pbegin);
     }
@@ -407,12 +404,12 @@ public:
     CVarInt(I& nIn) : n(nIn) { }
 
     template<typename Stream>
-    void Serialize(Stream &s, int, int) const {
+    void Serialize(Stream &s) const {
         WriteVarInt<Stream,I>(s, n);
     }
 
     template<typename Stream>
-    void Unserialize(Stream& s, int, int) {
+    void Unserialize(Stream& s) {
         n = ReadVarInt<Stream,I>(s);
     }
 };
@@ -425,12 +422,12 @@ public:
     CCompactSize(uint64_t& nIn) : n(nIn) { }
 
     template<typename Stream>
-    void Serialize(Stream &s, int, int) const {
+    void Serialize(Stream &s) const {
         WriteCompactSize<Stream>(s, n);
     }
 
     template<typename Stream>
-    void Unserialize(Stream& s, int, int) {
+    void Unserialize(Stream& s) {
         n = ReadCompactSize<Stream>(s);
     }
 };
@@ -444,7 +441,7 @@ public:
     LimitedString(std::string& string) : string(string) {}
 
     template<typename Stream>
-    void Unserialize(Stream& s, int, int=0)
+    void Unserialize(Stream& s)
     {
         size_t size = ReadCompactSize(s);
         if (size > Limit) {
@@ -456,7 +453,7 @@ public:
     }
 
     template<typename Stream>
-    void Serialize(Stream& s, int, int=0) const
+    void Serialize(Stream& s) const
     {
         WriteCompactSize(s, string.size());
         if (!string.empty())
@@ -474,48 +471,48 @@ CVarInt<I> WrapVarInt(I& n) { return CVarInt<I>(n); }
 /**
  *  string
  */
-template<typename Stream, typename C> void Serialize(Stream& os, const std::basic_string<C>& str, int, int=0);
-template<typename Stream, typename C> void Unserialize(Stream& is, std::basic_string<C>& str, int, int=0);
+template<typename Stream, typename C> void Serialize(Stream& os, const std::basic_string<C>& str);
+template<typename Stream, typename C> void Unserialize(Stream& is, std::basic_string<C>& str);
 
 /**
  * prevector
  * prevectors of unsigned char are a special case and are intended to be serialized as a single opaque blob.
  */
-template<typename Stream, unsigned int N, typename T> void Serialize_impl(Stream& os, const prevector<N, T>& v, int nType, int nVersion, const unsigned char&);
-template<typename Stream, unsigned int N, typename T, typename V> void Serialize_impl(Stream& os, const prevector<N, T>& v, int nType, int nVersion, const V&);
-template<typename Stream, unsigned int N, typename T> inline void Serialize(Stream& os, const prevector<N, T>& v, int nType, int nVersion);
-template<typename Stream, unsigned int N, typename T> void Unserialize_impl(Stream& is, prevector<N, T>& v, int nType, int nVersion, const unsigned char&);
-template<typename Stream, unsigned int N, typename T, typename V> void Unserialize_impl(Stream& is, prevector<N, T>& v, int nType, int nVersion, const V&);
-template<typename Stream, unsigned int N, typename T> inline void Unserialize(Stream& is, prevector<N, T>& v, int nType, int nVersion);
+template<typename Stream, unsigned int N, typename T> void Serialize_impl(Stream& os, const prevector<N, T>& v, const unsigned char&);
+template<typename Stream, unsigned int N, typename T, typename V> void Serialize_impl(Stream& os, const prevector<N, T>& v, const V&);
+template<typename Stream, unsigned int N, typename T> inline void Serialize(Stream& os, const prevector<N, T>& v);
+template<typename Stream, unsigned int N, typename T> void Unserialize_impl(Stream& is, prevector<N, T>& v, const unsigned char&);
+template<typename Stream, unsigned int N, typename T, typename V> void Unserialize_impl(Stream& is, prevector<N, T>& v, const V&);
+template<typename Stream, unsigned int N, typename T> inline void Unserialize(Stream& is, prevector<N, T>& v);
 
 /**
  * vector
  * vectors of unsigned char are a special case and are intended to be serialized as a single opaque blob.
  */
-template<typename Stream, typename T, typename A> void Serialize_impl(Stream& os, const std::vector<T, A>& v, int nType, int nVersion, const unsigned char&);
-template<typename Stream, typename T, typename A, typename V> void Serialize_impl(Stream& os, const std::vector<T, A>& v, int nType, int nVersion, const V&);
-template<typename Stream, typename T, typename A> inline void Serialize(Stream& os, const std::vector<T, A>& v, int nType, int nVersion);
-template<typename Stream, typename T, typename A> void Unserialize_impl(Stream& is, std::vector<T, A>& v, int nType, int nVersion, const unsigned char&);
-template<typename Stream, typename T, typename A, typename V> void Unserialize_impl(Stream& is, std::vector<T, A>& v, int nType, int nVersion, const V&);
-template<typename Stream, typename T, typename A> inline void Unserialize(Stream& is, std::vector<T, A>& v, int nType, int nVersion);
+template<typename Stream, typename T, typename A> void Serialize_impl(Stream& os, const std::vector<T, A>& v, const unsigned char&);
+template<typename Stream, typename T, typename A, typename V> void Serialize_impl(Stream& os, const std::vector<T, A>& v, const V&);
+template<typename Stream, typename T, typename A> inline void Serialize(Stream& os, const std::vector<T, A>& v);
+template<typename Stream, typename T, typename A> void Unserialize_impl(Stream& is, std::vector<T, A>& v, const unsigned char&);
+template<typename Stream, typename T, typename A, typename V> void Unserialize_impl(Stream& is, std::vector<T, A>& v, const V&);
+template<typename Stream, typename T, typename A> inline void Unserialize(Stream& is, std::vector<T, A>& v);
 
 /**
  * pair
  */
-template<typename Stream, typename K, typename T> void Serialize(Stream& os, const std::pair<K, T>& item, int nType, int nVersion);
-template<typename Stream, typename K, typename T> void Unserialize(Stream& is, std::pair<K, T>& item, int nType, int nVersion);
+template<typename Stream, typename K, typename T> void Serialize(Stream& os, const std::pair<K, T>& item);
+template<typename Stream, typename K, typename T> void Unserialize(Stream& is, std::pair<K, T>& item);
 
 /**
  * map
  */
-template<typename Stream, typename K, typename T, typename Pred, typename A> void Serialize(Stream& os, const std::map<K, T, Pred, A>& m, int nType, int nVersion);
-template<typename Stream, typename K, typename T, typename Pred, typename A> void Unserialize(Stream& is, std::map<K, T, Pred, A>& m, int nType, int nVersion);
+template<typename Stream, typename K, typename T, typename Pred, typename A> void Serialize(Stream& os, const std::map<K, T, Pred, A>& m);
+template<typename Stream, typename K, typename T, typename Pred, typename A> void Unserialize(Stream& is, std::map<K, T, Pred, A>& m);
 
 /**
  * set
  */
-template<typename Stream, typename K, typename Pred, typename A> void Serialize(Stream& os, const std::set<K, Pred, A>& m, int nType, int nVersion);
-template<typename Stream, typename K, typename Pred, typename A> void Unserialize(Stream& is, std::set<K, Pred, A>& m, int nType, int nVersion);
+template<typename Stream, typename K, typename Pred, typename A> void Serialize(Stream& os, const std::set<K, Pred, A>& m);
+template<typename Stream, typename K, typename Pred, typename A> void Unserialize(Stream& is, std::set<K, Pred, A>& m);
 
 
 
@@ -523,20 +520,17 @@ template<typename Stream, typename K, typename Pred, typename A> void Unserializ
 
 /**
  * If none of the specialized versions above matched, default to calling member function.
- * "int nType" is changed to "long nType" to keep from getting an ambiguous overload error.
- * The compiler will only cast int to long if none of the other templates matched.
- * Thanks to Boost serialization for this idea.
  */
 template<typename Stream, typename T>
-inline void Serialize(Stream& os, const T& a, long nType, int nVersion)
+inline void Serialize(Stream& os, const T& a)
 {
-    a.Serialize(os, (int)nType, nVersion);
+    a.Serialize(os);
 }
 
 template<typename Stream, typename T>
-inline void Unserialize(Stream& is, T& a, long nType, int nVersion)
+inline void Unserialize(Stream& is, T& a)
 {
-    a.Unserialize(is, (int)nType, nVersion);
+    a.Unserialize(is);
 }
 
 
@@ -547,7 +541,7 @@ inline void Unserialize(Stream& is, T& a, long nType, int nVersion)
  * string
  */
 template<typename Stream, typename C>
-void Serialize(Stream& os, const std::basic_string<C>& str, int, int)
+void Serialize(Stream& os, const std::basic_string<C>& str)
 {
     WriteCompactSize(os, str.size());
     if (!str.empty())
@@ -555,7 +549,7 @@ void Serialize(Stream& os, const std::basic_string<C>& str, int, int)
 }
 
 template<typename Stream, typename C>
-void Unserialize(Stream& is, std::basic_string<C>& str, int, int)
+void Unserialize(Stream& is, std::basic_string<C>& str)
 {
     unsigned int nSize = ReadCompactSize(is);
     str.resize(nSize);
@@ -569,7 +563,7 @@ void Unserialize(Stream& is, std::basic_string<C>& str, int, int)
  * prevector
  */
 template<typename Stream, unsigned int N, typename T>
-void Serialize_impl(Stream& os, const prevector<N, T>& v, int nType, int nVersion, const unsigned char&)
+void Serialize_impl(Stream& os, const prevector<N, T>& v, const unsigned char&)
 {
     WriteCompactSize(os, v.size());
     if (!v.empty())
@@ -577,22 +571,22 @@ void Serialize_impl(Stream& os, const prevector<N, T>& v, int nType, int nVersio
 }
 
 template<typename Stream, unsigned int N, typename T, typename V>
-void Serialize_impl(Stream& os, const prevector<N, T>& v, int nType, int nVersion, const V&)
+void Serialize_impl(Stream& os, const prevector<N, T>& v, const V&)
 {
     WriteCompactSize(os, v.size());
     for (typename prevector<N, T>::const_iterator vi = v.begin(); vi != v.end(); ++vi)
-        ::Serialize(os, (*vi), nType, nVersion);
+        ::Serialize(os, (*vi));
 }
 
 template<typename Stream, unsigned int N, typename T>
-inline void Serialize(Stream& os, const prevector<N, T>& v, int nType, int nVersion)
+inline void Serialize(Stream& os, const prevector<N, T>& v)
 {
-    Serialize_impl(os, v, nType, nVersion, T());
+    Serialize_impl(os, v, T());
 }
 
 
 template<typename Stream, unsigned int N, typename T>
-void Unserialize_impl(Stream& is, prevector<N, T>& v, int nType, int nVersion, const unsigned char&)
+void Unserialize_impl(Stream& is, prevector<N, T>& v, const unsigned char&)
 {
     // Limit size per read so bogus size value won't cause out of memory
     v.clear();
@@ -608,7 +602,7 @@ void Unserialize_impl(Stream& is, prevector<N, T>& v, int nType, int nVersion, c
 }
 
 template<typename Stream, unsigned int N, typename T, typename V>
-void Unserialize_impl(Stream& is, prevector<N, T>& v, int nType, int nVersion, const V&)
+void Unserialize_impl(Stream& is, prevector<N, T>& v, const V&)
 {
     v.clear();
     unsigned int nSize = ReadCompactSize(is);
@@ -621,14 +615,14 @@ void Unserialize_impl(Stream& is, prevector<N, T>& v, int nType, int nVersion, c
             nMid = nSize;
         v.resize(nMid);
         for (; i < nMid; i++)
-            Unserialize(is, v[i], nType, nVersion);
+            Unserialize(is, v[i]);
     }
 }
 
 template<typename Stream, unsigned int N, typename T>
-inline void Unserialize(Stream& is, prevector<N, T>& v, int nType, int nVersion)
+inline void Unserialize(Stream& is, prevector<N, T>& v)
 {
-    Unserialize_impl(is, v, nType, nVersion, T());
+    Unserialize_impl(is, v, T());
 }
 
 
@@ -637,7 +631,7 @@ inline void Unserialize(Stream& is, prevector<N, T>& v, int nType, int nVersion)
  * vector
  */
 template<typename Stream, typename T, typename A>
-void Serialize_impl(Stream& os, const std::vector<T, A>& v, int nType, int nVersion, const unsigned char&)
+void Serialize_impl(Stream& os, const std::vector<T, A>& v, const unsigned char&)
 {
     WriteCompactSize(os, v.size());
     if (!v.empty())
@@ -645,22 +639,22 @@ void Serialize_impl(Stream& os, const std::vector<T, A>& v, int nType, int nVers
 }
 
 template<typename Stream, typename T, typename A, typename V>
-void Serialize_impl(Stream& os, const std::vector<T, A>& v, int nType, int nVersion, const V&)
+void Serialize_impl(Stream& os, const std::vector<T, A>& v, const V&)
 {
     WriteCompactSize(os, v.size());
     for (typename std::vector<T, A>::const_iterator vi = v.begin(); vi != v.end(); ++vi)
-        ::Serialize(os, (*vi), nType, nVersion);
+        ::Serialize(os, (*vi));
 }
 
 template<typename Stream, typename T, typename A>
-inline void Serialize(Stream& os, const std::vector<T, A>& v, int nType, int nVersion)
+inline void Serialize(Stream& os, const std::vector<T, A>& v)
 {
-    Serialize_impl(os, v, nType, nVersion, T());
+    Serialize_impl(os, v, T());
 }
 
 
 template<typename Stream, typename T, typename A>
-void Unserialize_impl(Stream& is, std::vector<T, A>& v, int nType, int nVersion, const unsigned char&)
+void Unserialize_impl(Stream& is, std::vector<T, A>& v, const unsigned char&)
 {
     // Limit size per read so bogus size value won't cause out of memory
     v.clear();
@@ -676,7 +670,7 @@ void Unserialize_impl(Stream& is, std::vector<T, A>& v, int nType, int nVersion,
 }
 
 template<typename Stream, typename T, typename A, typename V>
-void Unserialize_impl(Stream& is, std::vector<T, A>& v, int nType, int nVersion, const V&)
+void Unserialize_impl(Stream& is, std::vector<T, A>& v, const V&)
 {
     v.clear();
     unsigned int nSize = ReadCompactSize(is);
@@ -689,14 +683,14 @@ void Unserialize_impl(Stream& is, std::vector<T, A>& v, int nType, int nVersion,
             nMid = nSize;
         v.resize(nMid);
         for (; i < nMid; i++)
-            Unserialize(is, v[i], nType, nVersion);
+            Unserialize(is, v[i]);
     }
 }
 
 template<typename Stream, typename T, typename A>
-inline void Unserialize(Stream& is, std::vector<T, A>& v, int nType, int nVersion)
+inline void Unserialize(Stream& is, std::vector<T, A>& v)
 {
-    Unserialize_impl(is, v, nType, nVersion, T());
+    Unserialize_impl(is, v, T());
 }
 
 
@@ -705,17 +699,17 @@ inline void Unserialize(Stream& is, std::vector<T, A>& v, int nType, int nVersio
  * pair
  */
 template<typename Stream, typename K, typename T>
-void Serialize(Stream& os, const std::pair<K, T>& item, int nType, int nVersion)
+void Serialize(Stream& os, const std::pair<K, T>& item)
 {
-    Serialize(os, item.first, nType, nVersion);
-    Serialize(os, item.second, nType, nVersion);
+    Serialize(os, item.first);
+    Serialize(os, item.second);
 }
 
 template<typename Stream, typename K, typename T>
-void Unserialize(Stream& is, std::pair<K, T>& item, int nType, int nVersion)
+void Unserialize(Stream& is, std::pair<K, T>& item)
 {
-    Unserialize(is, item.first, nType, nVersion);
-    Unserialize(is, item.second, nType, nVersion);
+    Unserialize(is, item.first);
+    Unserialize(is, item.second);
 }
 
 
@@ -724,15 +718,15 @@ void Unserialize(Stream& is, std::pair<K, T>& item, int nType, int nVersion)
  * map
  */
 template<typename Stream, typename K, typename T, typename Pred, typename A>
-void Serialize(Stream& os, const std::map<K, T, Pred, A>& m, int nType, int nVersion)
+void Serialize(Stream& os, const std::map<K, T, Pred, A>& m)
 {
     WriteCompactSize(os, m.size());
     for (typename std::map<K, T, Pred, A>::const_iterator mi = m.begin(); mi != m.end(); ++mi)
-        Serialize(os, (*mi), nType, nVersion);
+        Serialize(os, (*mi));
 }
 
 template<typename Stream, typename K, typename T, typename Pred, typename A>
-void Unserialize(Stream& is, std::map<K, T, Pred, A>& m, int nType, int nVersion)
+void Unserialize(Stream& is, std::map<K, T, Pred, A>& m)
 {
     m.clear();
     unsigned int nSize = ReadCompactSize(is);
@@ -740,7 +734,7 @@ void Unserialize(Stream& is, std::map<K, T, Pred, A>& m, int nType, int nVersion
     for (unsigned int i = 0; i < nSize; i++)
     {
         std::pair<K, T> item;
-        Unserialize(is, item, nType, nVersion);
+        Unserialize(is, item);
         mi = m.insert(mi, item);
     }
 }
@@ -751,15 +745,15 @@ void Unserialize(Stream& is, std::map<K, T, Pred, A>& m, int nType, int nVersion
  * set
  */
 template<typename Stream, typename K, typename Pred, typename A>
-void Serialize(Stream& os, const std::set<K, Pred, A>& m, int nType, int nVersion)
+void Serialize(Stream& os, const std::set<K, Pred, A>& m)
 {
     WriteCompactSize(os, m.size());
     for (typename std::set<K, Pred, A>::const_iterator it = m.begin(); it != m.end(); ++it)
-        Serialize(os, (*it), nType, nVersion);
+        Serialize(os, (*it));
 }
 
 template<typename Stream, typename K, typename Pred, typename A>
-void Unserialize(Stream& is, std::set<K, Pred, A>& m, int nType, int nVersion)
+void Unserialize(Stream& is, std::set<K, Pred, A>& m)
 {
     m.clear();
     unsigned int nSize = ReadCompactSize(is);
@@ -767,7 +761,7 @@ void Unserialize(Stream& is, std::set<K, Pred, A>& m, int nType, int nVersion)
     for (unsigned int i = 0; i < nSize; i++)
     {
         K key;
-        Unserialize(is, key, nType, nVersion);
+        Unserialize(is, key);
         it = m.insert(it, key);
     }
 }
@@ -787,15 +781,15 @@ struct CSerActionUnserialize
 };
 
 template<typename Stream, typename T>
-inline void SerReadWrite(Stream& s, const T& obj, int nType, int nVersion, CSerActionSerialize ser_action)
+inline void SerReadWrite(Stream& s, const T& obj, CSerActionSerialize ser_action)
 {
-    ::Serialize(s, obj, nType, nVersion);
+    ::Serialize(s, obj);
 }
 
 template<typename Stream, typename T>
-inline void SerReadWrite(Stream& s, T& obj, int nType, int nVersion, CSerActionUnserialize ser_action)
+inline void SerReadWrite(Stream& s, T& obj, CSerActionUnserialize ser_action)
 {
-    ::Unserialize(s, obj, nType, nVersion);
+    ::Unserialize(s, obj);
 }
 
 
@@ -814,7 +808,6 @@ protected:
     const int nType;
     const int nVersion;
 public:
-
     CSizeComputer(int nTypeIn, int nVersionIn) : nSize(0), nType(nTypeIn), nVersion(nVersionIn) {}
 
     void write(const char *psz, size_t nSize)
@@ -825,61 +818,64 @@ public:
     template<typename T>
     CSizeComputer& operator<<(const T& obj)
     {
-        ::Serialize(*this, obj, nType, nVersion);
+        ::Serialize(*this, obj);
         return (*this);
     }
 
     size_t size() const {
         return nSize;
     }
+
+    int GetVersion() const { return nVersion; }
+    int GetType() const { return nType; }
 };
 
 template<typename Stream>
-void SerializeMany(Stream& s, int nType, int nVersion)
+void SerializeMany(Stream& s)
 {
 }
 
 template<typename Stream, typename Arg>
-void SerializeMany(Stream& s, int nType, int nVersion, Arg&& arg)
+void SerializeMany(Stream& s, Arg&& arg)
 {
-    ::Serialize(s, std::forward<Arg>(arg), nType, nVersion);
+    ::Serialize(s, std::forward<Arg>(arg));
 }
 
 template<typename Stream, typename Arg, typename... Args>
-void SerializeMany(Stream& s, int nType, int nVersion, Arg&& arg, Args&&... args)
+void SerializeMany(Stream& s, Arg&& arg, Args&&... args)
 {
-    ::Serialize(s, std::forward<Arg>(arg), nType, nVersion);
-    ::SerializeMany(s, nType, nVersion, std::forward<Args>(args)...);
+    ::Serialize(s, std::forward<Arg>(arg));
+    ::SerializeMany(s, std::forward<Args>(args)...);
 }
 
 template<typename Stream>
-inline void UnserializeMany(Stream& s, int nType, int nVersion)
+inline void UnserializeMany(Stream& s)
 {
 }
 
 template<typename Stream, typename Arg>
-inline void UnserializeMany(Stream& s, int nType, int nVersion, Arg& arg)
+inline void UnserializeMany(Stream& s, Arg& arg)
 {
-    ::Unserialize(s, arg, nType, nVersion);
+    ::Unserialize(s, arg);
 }
 
 template<typename Stream, typename Arg, typename... Args>
-inline void UnserializeMany(Stream& s, int nType, int nVersion, Arg& arg, Args&... args)
+inline void UnserializeMany(Stream& s, Arg& arg, Args&... args)
 {
-    ::Unserialize(s, arg, nType, nVersion);
-    ::UnserializeMany(s, nType, nVersion, args...);
+    ::Unserialize(s, arg);
+    ::UnserializeMany(s, args...);
 }
 
 template<typename Stream, typename... Args>
-inline void SerReadWriteMany(Stream& s, int nType, int nVersion, CSerActionSerialize ser_action, Args&&... args)
+inline void SerReadWriteMany(Stream& s, CSerActionSerialize ser_action, Args&&... args)
 {
-    ::SerializeMany(s, nType, nVersion, std::forward<Args>(args)...);
+    ::SerializeMany(s, std::forward<Args>(args)...);
 }
 
 template<typename Stream, typename... Args>
-inline void SerReadWriteMany(Stream& s, int nType, int nVersion, CSerActionUnserialize ser_action, Args&... args)
+inline void SerReadWriteMany(Stream& s, CSerActionUnserialize ser_action, Args&... args)
 {
-    ::UnserializeMany(s, nType, nVersion, args...);
+    ::UnserializeMany(s, args...);
 }
 
 template <typename T>
diff --git a/src/streams.h b/src/streams.h
index d9965b534d..c3e7c9e9e4 100644
--- a/src/streams.h
+++ b/src/streams.h
@@ -37,7 +37,7 @@ public:
     OverrideStream<Stream>& operator<<(const T& obj)
     {
         // Serialize to this stream
-        ::Serialize(*this->stream, obj, nType, nVersion);
+        ::Serialize(*this, obj);
         return (*this);
     }
 
@@ -45,9 +45,22 @@ public:
     OverrideStream<Stream>& operator>>(T& obj)
     {
         // Unserialize from this stream
-        ::Unserialize(*this->stream, obj, nType, nVersion);
+        ::Unserialize(*this, obj);
         return (*this);
     }
+
+    void write(const char* pch, size_t nSize)
+    {
+        stream->write(pch, nSize);
+    }
+
+    void read(char* pch, size_t nSize)
+    {
+        stream->read(pch, nSize);
+    }
+
+    int GetVersion() const { return nVersion; }
+    int GetType() const { return nType; }
 };
 
 template<typename S>
@@ -118,7 +131,7 @@ public:
     CDataStream(int nTypeIn, int nVersionIn, Args&&... args)
     {
         Init(nTypeIn, nVersionIn);
-        ::SerializeMany(*this, nType, nVersion, std::forward<Args>(args)...);
+        ::SerializeMany(*this, std::forward<Args>(args)...);
     }
 
     void Init(int nTypeIn, int nVersionIn)
@@ -301,7 +314,7 @@ public:
     }
 
     template<typename Stream>
-    void Serialize(Stream& s, int nType, int nVersion) const
+    void Serialize(Stream& s) const
     {
         // Special case: stream << stream concatenates like stream += stream
         if (!vch.empty())
@@ -312,7 +325,7 @@ public:
     CDataStream& operator<<(const T& obj)
     {
         // Serialize to this stream
-        ::Serialize(*this, obj, nType, nVersion);
+        ::Serialize(*this, obj);
         return (*this);
     }
 
@@ -320,7 +333,7 @@ public:
     CDataStream& operator>>(T& obj)
     {
         // Unserialize from this stream
-        ::Unserialize(*this, obj, nType, nVersion);
+        ::Unserialize(*this, obj);
         return (*this);
     }
 
@@ -456,7 +469,7 @@ public:
         // Serialize to this stream
         if (!file)
             throw std::ios_base::failure("CAutoFile::operator<<: file handle is NULL");
-        ::Serialize(*this, obj, nType, nVersion);
+        ::Serialize(*this, obj);
         return (*this);
     }
 
@@ -466,7 +479,7 @@ public:
         // Unserialize from this stream
         if (!file)
             throw std::ios_base::failure("CAutoFile::operator>>: file handle is NULL");
-        ::Unserialize(*this, obj, nType, nVersion);
+        ::Unserialize(*this, obj);
         return (*this);
     }
 };
@@ -525,6 +538,9 @@ public:
         fclose();
     }
 
+    int GetVersion() const { return nVersion; }
+    int GetType() const { return nType; }
+
     void fclose()
     {
         if (src) {
@@ -603,7 +619,7 @@ public:
     template<typename T>
     CBufferedFile& operator>>(T& obj) {
         // Unserialize from this stream
-        ::Unserialize(*this, obj, nType, nVersion);
+        ::Unserialize(*this, obj);
         return (*this);
     }
 
diff --git a/src/test/blockencodings_tests.cpp b/src/test/blockencodings_tests.cpp
index b0d9184816..0ed5d62ef6 100644
--- a/src/test/blockencodings_tests.cpp
+++ b/src/test/blockencodings_tests.cpp
@@ -129,7 +129,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         READWRITE(header);
         READWRITE(nonce);
         size_t shorttxids_size = shorttxids.size();
diff --git a/src/test/bloom_tests.cpp b/src/test/bloom_tests.cpp
index 042fad42da..25fb9ea2b7 100644
--- a/src/test/bloom_tests.cpp
+++ b/src/test/bloom_tests.cpp
@@ -41,7 +41,7 @@ BOOST_AUTO_TEST_CASE(bloom_create_insert_serialize)
     BOOST_CHECK_MESSAGE(filter.contains(ParseHex("b9300670b4c5366e95b2699e8b18bc75e5f729c5")), "BloomFilter doesn't contain just-inserted object (3)!");
 
     CDataStream stream(SER_NETWORK, PROTOCOL_VERSION);
-    filter.Serialize(stream, SER_NETWORK, PROTOCOL_VERSION);
+    stream << filter;
 
     vector<unsigned char> vch = ParseHex("03614e9b050000000000000001");
     vector<char> expected(vch.size());
@@ -73,7 +73,7 @@ BOOST_AUTO_TEST_CASE(bloom_create_insert_serialize_with_tweak)
     BOOST_CHECK_MESSAGE(filter.contains(ParseHex("b9300670b4c5366e95b2699e8b18bc75e5f729c5")), "BloomFilter doesn't contain just-inserted object (3)!");
 
     CDataStream stream(SER_NETWORK, PROTOCOL_VERSION);
-    filter.Serialize(stream, SER_NETWORK, PROTOCOL_VERSION);
+    stream << filter;
 
     vector<unsigned char> vch = ParseHex("03ce4299050000000100008001");
     vector<char> expected(vch.size());
@@ -100,7 +100,7 @@ BOOST_AUTO_TEST_CASE(bloom_create_insert_key)
     filter.insert(vector<unsigned char>(hash.begin(), hash.end()));
 
     CDataStream stream(SER_NETWORK, PROTOCOL_VERSION);
-    filter.Serialize(stream, SER_NETWORK, PROTOCOL_VERSION);
+    stream << filter;
 
     vector<unsigned char> vch = ParseHex("038fc16b080000000000000001");
     vector<char> expected(vch.size());
diff --git a/src/test/dbwrapper_tests.cpp b/src/test/dbwrapper_tests.cpp
index d4d825d199..2d791ee18d 100644
--- a/src/test/dbwrapper_tests.cpp
+++ b/src/test/dbwrapper_tests.cpp
@@ -254,7 +254,7 @@ struct StringContentsSerializer {
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         if (ser_action.ForRead()) {
             str.clear();
             char c = 0;
diff --git a/src/test/net_tests.cpp b/src/test/net_tests.cpp
index e0460109d5..87cb38daac 100644
--- a/src/test/net_tests.cpp
+++ b/src/test/net_tests.cpp
@@ -17,7 +17,7 @@ using namespace std;
 class CAddrManSerializationMock : public CAddrMan
 {
 public:
-    virtual void Serialize(CDataStream& s, int nType, int nVersionDummy) const = 0;
+    virtual void Serialize(CDataStream& s) const = 0;
 
     //! Ensure that bucket placement is always the same for testing purposes.
     void MakeDeterministic()
@@ -30,16 +30,16 @@ public:
 class CAddrManUncorrupted : public CAddrManSerializationMock
 {
 public:
-    void Serialize(CDataStream& s, int nType, int nVersionDummy) const
+    void Serialize(CDataStream& s) const
     {
-        CAddrMan::Serialize(s, nType, nVersionDummy);
+        CAddrMan::Serialize(s);
     }
 };
 
 class CAddrManCorrupted : public CAddrManSerializationMock
 {
 public:
-    void Serialize(CDataStream& s, int nType, int nVersionDummy) const
+    void Serialize(CDataStream& s) const
     {
         // Produces corrupt output that claims addrman has 20 addrs when it only has one addr.
         unsigned char nVersion = 1;
diff --git a/src/test/serialize_tests.cpp b/src/test/serialize_tests.cpp
index 4c0fdc77f7..bbadf57957 100644
--- a/src/test/serialize_tests.cpp
+++ b/src/test/serialize_tests.cpp
@@ -28,7 +28,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         READWRITE(intval);
         READWRITE(boolval);
         READWRITE(stringval);
@@ -53,7 +53,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         READWRITEMANY(intval, boolval, stringval, FLATDATA(charstrval), txval);
     }
 };
diff --git a/src/test/uint256_tests.cpp b/src/test/uint256_tests.cpp
index ba8eb16ba9..2732948060 100644
--- a/src/test/uint256_tests.cpp
+++ b/src/test/uint256_tests.cpp
@@ -187,22 +187,22 @@ BOOST_AUTO_TEST_CASE( methods ) // GetHex SetHex begin() end() size() GetLow64 G
     BOOST_CHECK(GetSerializeSize(R1L, 0, PROTOCOL_VERSION) == 32);
     BOOST_CHECK(GetSerializeSize(ZeroL, 0, PROTOCOL_VERSION) == 32);
 
-    std::stringstream ss;
-    R1L.Serialize(ss,0,PROTOCOL_VERSION);
+    CDataStream ss(0, PROTOCOL_VERSION);
+    ss << R1L;
     BOOST_CHECK(ss.str() == std::string(R1Array,R1Array+32));
-    TmpL.Unserialize(ss,0,PROTOCOL_VERSION);
+    ss >> TmpL;
     BOOST_CHECK(R1L == TmpL);
-    ss.str("");
-    ZeroL.Serialize(ss,0,PROTOCOL_VERSION);
+    ss.clear();
+    ss << ZeroL;
     BOOST_CHECK(ss.str() == std::string(ZeroArray,ZeroArray+32));
-    TmpL.Unserialize(ss,0,PROTOCOL_VERSION);
+    ss >> TmpL;
     BOOST_CHECK(ZeroL == TmpL);
-    ss.str("");
-    MaxL.Serialize(ss,0,PROTOCOL_VERSION);
+    ss.clear();
+    ss << MaxL;
     BOOST_CHECK(ss.str() == std::string(MaxArray,MaxArray+32));
-    TmpL.Unserialize(ss,0,PROTOCOL_VERSION);
+    ss >> TmpL;
     BOOST_CHECK(MaxL == TmpL);
-    ss.str("");
+    ss.clear();
 
     BOOST_CHECK(R1S.GetHex() == R1S.ToString());
     BOOST_CHECK(R2S.GetHex() == R2S.ToString());
@@ -233,21 +233,21 @@ BOOST_AUTO_TEST_CASE( methods ) // GetHex SetHex begin() end() size() GetLow64 G
     BOOST_CHECK(GetSerializeSize(R1S, 0, PROTOCOL_VERSION) == 20);
     BOOST_CHECK(GetSerializeSize(ZeroS, 0, PROTOCOL_VERSION) == 20);
 
-    R1S.Serialize(ss,0,PROTOCOL_VERSION);
+    ss << R1S;
     BOOST_CHECK(ss.str() == std::string(R1Array,R1Array+20));
-    TmpS.Unserialize(ss,0,PROTOCOL_VERSION);
+    ss >> TmpS;
     BOOST_CHECK(R1S == TmpS);
-    ss.str("");
-    ZeroS.Serialize(ss,0,PROTOCOL_VERSION);
+    ss.clear();
+    ss << ZeroS;
     BOOST_CHECK(ss.str() == std::string(ZeroArray,ZeroArray+20));
-    TmpS.Unserialize(ss,0,PROTOCOL_VERSION);
+    ss >> TmpS;
     BOOST_CHECK(ZeroS == TmpS);
-    ss.str("");
-    MaxS.Serialize(ss,0,PROTOCOL_VERSION);
+    ss.clear();
+    ss << MaxS;
     BOOST_CHECK(ss.str() == std::string(MaxArray,MaxArray+20));
-    TmpS.Unserialize(ss,0,PROTOCOL_VERSION);
+    ss >> TmpS;
     BOOST_CHECK(MaxS == TmpS);
-    ss.str("");
+    ss.clear();
 }
 
 BOOST_AUTO_TEST_CASE( conversion )
diff --git a/src/txdb.h b/src/txdb.h
index adb3f66327..687c686775 100644
--- a/src/txdb.h
+++ b/src/txdb.h
@@ -43,7 +43,7 @@ struct CDiskTxPos : public CDiskBlockPos
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         READWRITE(*(CDiskBlockPos*)this);
         READWRITE(VARINT(nTxOffset));
     }
diff --git a/src/uint256.h b/src/uint256.h
index 94fe66d26c..86e7c0b6c6 100644
--- a/src/uint256.h
+++ b/src/uint256.h
@@ -92,13 +92,13 @@ public:
     }
 
     template<typename Stream>
-    void Serialize(Stream& s, int nType, int nVersion) const
+    void Serialize(Stream& s) const
     {
         s.write((char*)data, sizeof(data));
     }
 
     template<typename Stream>
-    void Unserialize(Stream& s, int nType, int nVersion)
+    void Unserialize(Stream& s)
     {
         s.read((char*)data, sizeof(data));
     }
diff --git a/src/undo.h b/src/undo.h
index 9d6f9bd0d0..a5d276e7f3 100644
--- a/src/undo.h
+++ b/src/undo.h
@@ -28,22 +28,22 @@ public:
     CTxInUndo(const CTxOut &txoutIn, bool fCoinBaseIn = false, unsigned int nHeightIn = 0, int nVersionIn = 0) : txout(txoutIn), fCoinBase(fCoinBaseIn), nHeight(nHeightIn), nVersion(nVersionIn) { }
 
     template<typename Stream>
-    void Serialize(Stream &s, int nType, int nVersion) const {
-        ::Serialize(s, VARINT(nHeight*2+(fCoinBase ? 1 : 0)), nType, nVersion);
+    void Serialize(Stream &s) const {
+        ::Serialize(s, VARINT(nHeight*2+(fCoinBase ? 1 : 0)));
         if (nHeight > 0)
-            ::Serialize(s, VARINT(this->nVersion), nType, nVersion);
-        ::Serialize(s, CTxOutCompressor(REF(txout)), nType, nVersion);
+            ::Serialize(s, VARINT(this->nVersion));
+        ::Serialize(s, CTxOutCompressor(REF(txout)));
     }
 
     template<typename Stream>
-    void Unserialize(Stream &s, int nType, int nVersion) {
+    void Unserialize(Stream &s) {
         unsigned int nCode = 0;
-        ::Unserialize(s, VARINT(nCode), nType, nVersion);
+        ::Unserialize(s, VARINT(nCode));
         nHeight = nCode / 2;
         fCoinBase = nCode & 1;
         if (nHeight > 0)
-            ::Unserialize(s, VARINT(this->nVersion), nType, nVersion);
-        ::Unserialize(s, REF(CTxOutCompressor(REF(txout))), nType, nVersion);
+            ::Unserialize(s, VARINT(this->nVersion));
+        ::Unserialize(s, REF(CTxOutCompressor(REF(txout))));
     }
 };
 
@@ -57,7 +57,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         READWRITE(vprevout);
     }
 };
@@ -71,7 +71,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         READWRITE(vtxundo);
     }
 };
diff --git a/src/wallet/crypter.h b/src/wallet/crypter.h
index f00f7fa731..e89c15b5d4 100644
--- a/src/wallet/crypter.h
+++ b/src/wallet/crypter.h
@@ -47,7 +47,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         READWRITE(vchCryptedKey);
         READWRITE(vchSalt);
         READWRITE(nDerivationMethod);
diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h
index 57b17d87ad..a527c6d84e 100644
--- a/src/wallet/wallet.h
+++ b/src/wallet/wallet.h
@@ -100,8 +100,9 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
-        if (!(nType & SER_GETHASH))
+    inline void SerializationOp(Stream& s, Operation ser_action) {
+        int nVersion = s.GetVersion();
+        if (!(s.GetType() & SER_GETHASH))
             READWRITE(nVersion);
         READWRITE(nTime);
         READWRITE(vchPubKey);
@@ -195,7 +196,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         std::vector<uint256> vMerkleBranch; // For compatibility with older versions.
         READWRITE(*(CTransaction*)this);
         READWRITE(hashBlock);
@@ -315,7 +316,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         if (ser_action.ForRead())
             Init(NULL);
         char fSpent = false;
@@ -448,8 +449,9 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
-        if (!(nType & SER_GETHASH))
+    inline void SerializationOp(Stream& s, Operation ser_action) {
+        int nVersion = s.GetVersion();
+        if (!(s.GetType() & SER_GETHASH))
             READWRITE(nVersion);
         READWRITE(vchPrivKey);
         READWRITE(nTimeCreated);
@@ -493,8 +495,9 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
-        if (!(nType & SER_GETHASH))
+    inline void SerializationOp(Stream& s, Operation ser_action) {
+        int nVersion = s.GetVersion();
+        if (!(s.GetType() & SER_GETHASH))
             READWRITE(nVersion);
         //! Note: strAccount is serialized as part of the key, not here.
         READWRITE(nCreditDebit);
@@ -507,7 +510,7 @@ public:
 
             if (!(mapValue.empty() && _ssExtra.empty()))
             {
-                CDataStream ss(nType, nVersion);
+                CDataStream ss(s.GetType(), s.GetVersion());
                 ss.insert(ss.begin(), '\0');
                 ss << mapValue;
                 ss.insert(ss.end(), _ssExtra.begin(), _ssExtra.end());
@@ -523,7 +526,7 @@ public:
             mapValue.clear();
             if (std::string::npos != nSepPos)
             {
-                CDataStream ss(std::vector<char>(strComment.begin() + nSepPos + 1, strComment.end()), nType, nVersion);
+                CDataStream ss(std::vector<char>(strComment.begin() + nSepPos + 1, strComment.end()), s.GetType(), s.GetVersion());
                 ss >> mapValue;
                 _ssExtra = std::vector<char>(ss.begin(), ss.end());
             }
@@ -986,8 +989,9 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
-        if (!(nType & SER_GETHASH))
+    inline void SerializationOp(Stream& s, Operation ser_action) {
+        int nVersion = s.GetVersion();
+        if (!(s.GetType() & SER_GETHASH))
             READWRITE(nVersion);
         READWRITE(vchPubKey);
     }
diff --git a/src/wallet/walletdb.h b/src/wallet/walletdb.h
index a0525bd9a7..eb25ac613d 100644
--- a/src/wallet/walletdb.h
+++ b/src/wallet/walletdb.h
@@ -54,7 +54,7 @@ public:
     CHDChain() { SetNull(); }
     ADD_SERIALIZE_METHODS;
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion)
+    inline void SerializationOp(Stream& s, Operation ser_action)
     {
         READWRITE(this->nVersion);
         READWRITE(nExternalChainCounter);
@@ -93,7 +93,7 @@ public:
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
+    inline void SerializationOp(Stream& s, Operation ser_action) {
         READWRITE(this->nVersion);
         READWRITE(nCreateTime);
         if (this->nVersion >= VERSION_WITH_HDDATA)