remove "checkorder" and "reply" P2P commands

These command are a leftover from send-to-IP transactions, which have been
removed a long time ago.
Also removes CNode::mapRequests and CNode::PushRequests, as these were
only used for the mentioned commands.

src/main.cpp

@@ -2413,7 +2413,6 @@ unsigned char pchMessageStart[4] = { 0xf9, 0xbe, 0xb4, 0xd9 };
 
 bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
 {
-    static map<CService, CPubKey> mapReuseKey;
     RandAddSeedPerfmon();
     if (fDebug)
         printf("received: %s (%"PRIszu" bytes)\n", strCommand.c_str(), vRecv.size());
@@ -2921,53 +2920,6 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
     }
 
 
-    else if (strCommand == "checkorder")
-    {
-        uint256 hashReply;
-        vRecv >> hashReply;
-
-        if (!GetBoolArg("-allowreceivebyip"))
-        {
-            pfrom->PushMessage("reply", hashReply, (int)2, string(""));
-            return true;
-        }
-
-        CWalletTx order;
-        vRecv >> order;
-
-        /// we have a chance to check the order here
-
-        // Keep giving the same key to the same ip until they use it
-        if (!mapReuseKey.count(pfrom->addr))
-            pwalletMain->GetKeyFromPool(mapReuseKey[pfrom->addr], true);
-
-        // Send back approval of order and pubkey to use
-        CScript scriptPubKey;
-        scriptPubKey << mapReuseKey[pfrom->addr] << OP_CHECKSIG;
-        pfrom->PushMessage("reply", hashReply, (int)0, scriptPubKey);
-    }
-
-
-    else if (strCommand == "reply")
-    {
-        uint256 hashReply;
-        vRecv >> hashReply;
-
-        CRequestTracker tracker;
-        {
-            LOCK(pfrom->cs_mapRequests);
-            map<uint256, CRequestTracker>::iterator mi = pfrom->mapRequests.find(hashReply);
-            if (mi != pfrom->mapRequests.end())
-            {
-                tracker = (*mi).second;
-                pfrom->mapRequests.erase(mi);
-            }
-        }
-        if (!tracker.IsNull())
-            tracker.fn(tracker.param1, vRecv);
-    }
-
-
     else if (strCommand == "ping")
     {
         if (pfrom->nVersion > BIP0031_VERSION)

src/main.h

@@ -20,7 +20,6 @@ class CReserveKey;
 
 class CAddress;
 class CInv;
-class CRequestTracker;
 class CNode;
 
 static const unsigned int MAX_BLOCK_SIZE = 1000000;

src/net.cpp

@@ -710,9 +710,6 @@ void ThreadSocketHandler2(void* parg)
                         {
                             TRY_LOCK(pnode->cs_vRecv, lockRecv);
                             if (lockRecv)
-                            {
-                                TRY_LOCK(pnode->cs_mapRequests, lockReq);
-                                if (lockReq)
                             {
                                 TRY_LOCK(pnode->cs_inventory, lockInv);
                                 if (lockInv)
@@ -720,7 +717,6 @@ void ThreadSocketHandler2(void* parg)
                             }
                         }
                     }
-                    }
                     if (fDelete)
                     {
                         vNodesDisconnected.remove(pnode);

src/net.h

@@ -19,7 +19,6 @@
 #include "protocol.h"
 #include "addrman.h"
 
-class CRequestTracker;
 class CNode;
 class CBlockIndex;
 extern int nBestHeight;
@@ -74,25 +73,6 @@ enum
     MSG_BLOCK,
 };
 
-class CRequestTracker
-{
-public:
-    void (*fn)(void*, CDataStream&);
-    void* param1;
-
-    explicit CRequestTracker(void (*fnIn)(void*, CDataStream&)=NULL, void* param1In=NULL)
-    {
-        fn = fnIn;
-        param1 = param1In;
-    }
-
-    bool IsNull()
-    {
-        return fn == NULL;
-    }
-};
-
-
 /** Thread types */
 enum threadId
 {
@@ -188,8 +168,6 @@ protected:
 
 public:
     int64 nReleaseTime;
-    std::map<uint256, CRequestTracker> mapRequests;
-    CCriticalSection cs_mapRequests;
     uint256 hashContinue;
     CBlockIndex* pindexLastGetBlocksBegin;
     uint256 hashLastGetBlocksEnd;
@@ -563,53 +541,6 @@ public:
         }
     }
 
-
-    void PushRequest(const char* pszCommand,
-                     void (*fn)(void*, CDataStream&), void* param1)
-    {
-        uint256 hashReply;
-        RAND_bytes((unsigned char*)&hashReply, sizeof(hashReply));
-
-        {
-            LOCK(cs_mapRequests);
-            mapRequests[hashReply] = CRequestTracker(fn, param1);
-        }
-
-        PushMessage(pszCommand, hashReply);
-    }
-
-    template<typename T1>
-    void PushRequest(const char* pszCommand, const T1& a1,
-                     void (*fn)(void*, CDataStream&), void* param1)
-    {
-        uint256 hashReply;
-        RAND_bytes((unsigned char*)&hashReply, sizeof(hashReply));
-
-        {
-            LOCK(cs_mapRequests);
-            mapRequests[hashReply] = CRequestTracker(fn, param1);
-        }
-
-        PushMessage(pszCommand, hashReply, a1);
-    }
-
-    template<typename T1, typename T2>
-    void PushRequest(const char* pszCommand, const T1& a1, const T2& a2,
-                     void (*fn)(void*, CDataStream&), void* param1)
-    {
-        uint256 hashReply;
-        RAND_bytes((unsigned char*)&hashReply, sizeof(hashReply));
-
-        {
-            LOCK(cs_mapRequests);
-            mapRequests[hashReply] = CRequestTracker(fn, param1);
-        }
-
-        PushMessage(pszCommand, hashReply, a1, a2);
-    }
-
-
-
     void PushGetBlocks(CBlockIndex* pindexBegin, uint256 hashEnd);
     bool IsSubscribed(unsigned int nChannel);
     void Subscribe(unsigned int nChannel, unsigned int nHops=0);