X-Git-Url: https://git.novaco.in/?p=novacoin.git;a=blobdiff_plain;f=src%2Fwallet.cpp;h=96dbdeb7f4702fd08a88d19acb6f14c87ce9a93f;hp=a78a76b0c16aeea8bc670811c4a17ed8325bf2ff;hb=5467a4509d8303226a816edd6ee32db69d37f923;hpb=ea40b3fa855e043b7bf1a82301b462c3de1b071b

diff --git a/src/wallet.cpp b/src/wallet.cpp
index a78a76b..96dbdeb 100644
--- a/src/wallet.cpp
+++ b/src/wallet.cpp
@@ -2043,7 +2043,13 @@ bool CWallet::CreateCoinStake(const CKeyStore& keystore, unsigned int nBits, int
         CTxDB txdb("r");
         if (!txNew.GetCoinAge(txdb, nCoinAge))
             return error("CreateCoinStake : failed to calculate coin age");
-        nCredit += GetProofOfStakeReward(nCoinAge, nBits, txNew.nTime);
+        
+        int64 nReward = GetProofOfStakeReward(nCoinAge, nBits, txNew.nTime);
+        // Refuse to create mint that has zero or negative reward
+        if(nReward <= 0)
+            return false;
+    
+        nCredit += nReward;
     }
 
     int64 nMinFee = 0;
@@ -2798,4 +2804,4 @@ void CWallet::ClearOrphans()
 
     for(list<uint256>::const_iterator it = orphans.begin(); it != orphans.end(); ++it)
         EraseFromWallet(*it);
-}
\ No newline at end of file
+}