Check last 288 block index records at startup.

[novacoin.git] / src / main.cpp

diff --git a/src/main.cpp b/src/main.cpp
index f3682e7..1e68aef 100644 (file)
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -419,18 +419,29 @@ bool CTransaction::IsStandard() const
         }
     }
 
+    unsigned int nDataOut = 0;
+    txnouttype whichType;
     BOOST_FOREACH(const CTxOut& txout, vout) {
-        if (!::IsStandard(txout.scriptPubKey)) {
-            return false;
-        }
-        if (txout.nValue == 0) {
+        if (!::IsStandard(txout.scriptPubKey, whichType)) {
             return false;
         }
-        if (fEnforceCanonical && !txout.scriptPubKey.HasCanonicalPushes()) {
-            return false;
+        if (whichType == TX_NULL_DATA)
+            nDataOut++;
+        else {
+            if (txout.nValue == 0) {
+                return false;
+            }
+            if (fEnforceCanonical && !txout.scriptPubKey.HasCanonicalPushes()) {
+                return false;
+            }
         }
     }
 
+    // only one OP_RETURN txout is permitted
+    if (nDataOut > 1) {
+        return false;
+    }
+
     return true;
 }
 
@@ -592,6 +603,8 @@ bool CTransaction::CheckTransaction() const
         if (!fTestNet && !IsCoinBase() && !txout.IsEmpty() && nTime < OUTPUT_SWITCH_TIME && txout.nValue < MIN_TXOUT_AMOUNT)
             return DoS(100, error("CTransaction::CheckTransaction() : txout.nValue below minimum"));
 
+        if (txout.nValue < 0)
+            return DoS(100, error("CTransaction::CheckTransaction() : txout.nValue is negative"));
         if (txout.nValue > MAX_MONEY)
             return DoS(100, error("CTransaction::CheckTransaction() : txout.nValue too high"));
         nValueOut += txout.nValue;
@@ -2764,6 +2777,28 @@ bool CBlock::CheckLegacySignature() const
     return false;
 }
 
+// entropy bit for stake modifier if chosen by modifier
+unsigned int CBlock::GetStakeEntropyBit(unsigned int nTime) const
+{
+    // Protocol switch at novacoin block #9689
+    if (nTime >= ENTROPY_SWITCH_TIME || fTestNet)
+    {
+        // Take last bit of block hash as entropy bit
+        unsigned int nEntropyBit = ((GetHash().Get64()) & 1llu);
+        if (fDebug && GetBoolArg("-printstakemodifier"))
+            printf("GetStakeEntropyBit: nTime=%u hashBlock=%s nEntropyBit=%u\n", nTime, GetHash().ToString().c_str(), nEntropyBit);
+        return nEntropyBit;
+    }
+    // Before novacoin block #9689 - old protocol
+    uint160 hashSig = Hash160(vchBlockSig);
+    if (fDebug && GetBoolArg("-printstakemodifier"))
+        printf("GetStakeEntropyBit: hashSig=%s", hashSig.ToString().c_str());
+    hashSig >>= 159; // take the first bit of the hash
+    if (fDebug && GetBoolArg("-printstakemodifier"))
+        printf(" entropybit=%"PRI64d"\n", hashSig.Get64());
+    return hashSig.Get64();
+}
+
 bool CheckDiskSpace(uint64 nAdditionalBytes)
 {
     uint64 nFreeBytesAvailable = filesystem::space(GetDataDir()).available;
@@ -2910,7 +2945,7 @@ bool static LoadBlockIndexDB()
 
     // Verify blocks in the best chain
     int nCheckLevel = GetArg("-checklevel", 1);
-    int nCheckDepth = GetArg( "-checkblocks", 2500);
+    int nCheckDepth = GetArg( "-checkblocks", 288);
     if (nCheckDepth == 0)
         nCheckDepth = 1000000000; // suffices until the year 19000
     if (nCheckDepth > nBestHeight)