Remove wxWidgets

[VerusCoin.git] / src / main.cpp

diff --git a/src/main.cpp b/src/main.cpp
index ac912f9b53cfa4734823f1fd4dd2b91922122b1f..be6fc9c53fad3c842c370faafbd15cdb10dc3972 100644 (file)
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -32,6 +32,7 @@ uint256 hashGenesisBlock("0x000000000019d6689c085ae165831e934ff763ae46a2a6c172b3
 static CBigNum bnProofOfWorkLimit(~uint256(0) >> 32);
 const int nTotalBlocksEstimate = 140700; // Conservative estimate of total nr of blocks on main chain
 const int nInitialBlockThreshold = 120; // Regard blocks up until N-threshold as "initial download"
+int nMaxBlocksOfPeers = 0; // Amount of blocks that other nodes claim to have
 CBlockIndex* pindexGenesisBlock = NULL;
 int nBestHeight = -1;
 CBigNum bnBestChainWork = 0;
@@ -726,6 +727,12 @@ int GetTotalBlocksEstimate()
     }
 }
 
+// Return maximum amount of blocks that other nodes claim to have
+int GetNumBlocksOfPeers()
+{
+    return std::max(nMaxBlocksOfPeers, GetTotalBlocksEstimate());
+}
+
 bool IsInitialBlockDownload()
 {
     if (pindexBest == NULL || nBestHeight < (GetTotalBlocksEstimate()-nInitialBlockThreshold))
@@ -803,6 +810,9 @@ bool CTransaction::ConnectInputs(CTxDB& txdb, map<uint256, CTxIndex>& mapTestPoo
                                  CBlockIndex* pindexBlock, int64& nFees, bool fBlock, bool fMiner, int64 nMinFee)
 {
     // Take over previous transactions' spent pointers
+    // fBlock is true when this is called from AcceptBlock when a new best-block is added to the blockchain
+    // fMiner is true when called from the internal bitcoin miner
+    // ... both are false when called from CTransaction::AcceptToMemoryPool
     if (!IsCoinBase())
     {
         int64 nValueIn = 0;
@@ -856,9 +866,13 @@ bool CTransaction::ConnectInputs(CTxDB& txdb, map<uint256, CTxIndex>& mapTestPoo
                     if (pindex->nBlockPos == txindex.pos.nBlockPos && pindex->nFile == txindex.pos.nFile)
                         return DoS(10, error("ConnectInputs() : tried to spend coinbase at depth %d", pindexBlock->nHeight - pindex->nHeight));
 
-            // Verify signature
-            if (!VerifySignature(txPrev, *this, i))
-                return DoS(100,error("ConnectInputs() : %s VerifySignature failed", GetHash().ToString().substr(0,10).c_str()));
+            // Skip ECDSA signature verification when connecting blocks (fBlock=true) during initial download
+            // (before the last blockchain checkpoint). This is safe because block merkle hashes are
+            // still computed and checked, and any change will be caught at the next checkpoint.
+            if (!(fBlock && IsInitialBlockDownload()))
+                // Verify signature
+                if (!VerifySignature(txPrev, *this, i))
+                    return DoS(100,error("ConnectInputs() : %s VerifySignature failed", GetHash().ToString().substr(0,10).c_str()));
 
             // Check for conflicts (double-spend)
             // This doesn't trigger the DoS code on purpose; if it did, it would make it easier
@@ -1845,6 +1859,10 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
         pfrom->fSuccessfullyConnected = true;
 
         printf("version message: version %d, blocks=%d\n", pfrom->nVersion, pfrom->nStartingHeight);
+        if(pfrom->nStartingHeight > nMaxBlocksOfPeers)
+        {
+            nMaxBlocksOfPeers = pfrom->nStartingHeight;
+        }
     }