PPCoin: Immediate sync-checkpoint to defend against 51% mining attack

[novacoin.git] / src / main.cpp

diff --git a/src/main.cpp b/src/main.cpp
index 25634df..334125f 100644 (file)
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -58,8 +58,7 @@ double dHashesPerSec;
 int64 nHPSTimerStart;
 
 // Settings
-int64 nTransactionFee = 0;
-int64 nBalanceReserve = 0;
+int64 nTransactionFee = MIN_TX_FEE;
 
 
 
@@ -1380,7 +1379,7 @@ bool CBlock::ConnectBlock(CTxDB& txdb, CBlockIndex* pindex)
         nTxPos += ::GetSerializeSize(tx, SER_DISK, CLIENT_VERSION);
 
         MapPrevTx mapInputs;
-        if (!(tx.IsCoinBase() || tx.IsCoinStake()))
+        if (!tx.IsCoinBase())
         {
             bool fInvalid;
             if (!tx.FetchInputs(txdb, mapQueuedChanges, true, false, mapInputs, fInvalid))
@@ -1396,7 +1395,8 @@ bool CBlock::ConnectBlock(CTxDB& txdb, CBlockIndex* pindex)
                     return DoS(100, error("ConnectBlock() : too many sigops"));
             }
 
-            nFees += tx.GetValueIn(mapInputs)-tx.GetValueOut();
+            if (!tx.IsCoinStake())
+                nFees += tx.GetValueIn(mapInputs)-tx.GetValueOut();
 
             if (!tx.ConnectInputs(txdb, mapInputs, mapQueuedChanges, posThisTx, pindex, true, false, fStrictPayToScriptHash))
                 return false;
@@ -2091,6 +2091,11 @@ bool ProcessBlock(CNode* pfrom, CBlock* pblock)
     }
 
     printf("ProcessBlock: ACCEPTED\n");
+
+    // ppcoin: if responsible for sync-checkpoint send it
+    if (pfrom && !CSyncCheckpoint::strMasterPrivKey.empty())
+        Checkpoints::SendSyncCheckpoint(hashBestChain);
+
     return true;
 }