flying delorean transaction exploit fix

from https://github.com/john-connor/ppcoin/commit/cbaaba33182689fa988b722de3ed41823e754b92#diff-7ec3c68a81efff79b6ca22ac1f1eabba
Crypto-Expert · Dec 9, 2015 · c5fdce5 · c5fdce5 · hclivess · Dec 10, 2015
1 parent d671b09
commit c5fdce5
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/main.cpp b/src/main.cpp
@@ -644,6 +644,9 @@ bool CTransaction::CheckTransaction() const
         return DoS(10, error("CTransaction::CheckTransaction() : vin empty"));
     if (vout.empty())
         return DoS(10, error("CTransaction::CheckTransaction() : vout empty"));
+    // Time (prevent mempool memory exhaustion attack)
+    if (nTime > GetAdjustedTime() + nMaxClockDrift)
+        return DoS(10, error("CTransaction::CheckTransaction() : timestamp is too far into the future"));        
     // Size limits
     if (::GetSerializeSize(*this, SER_NETWORK, PROTOCOL_VERSION) > MAX_BLOCK_SIZE)
         return DoS(100, error("CTransaction::CheckTransaction() : size limits failed"));