protected PoS from ensuring that a stake block cannot be accepted fro…

…m premine wallet

src/main.cpp

@@ -2279,6 +2279,35 @@ bool ProcessBlock(CNode* pfrom, CBlock* pblock)
             printf("WARNING: ProcessBlock(): check proof-of-stake failed for block %s\n", hash.ToString().c_str());
             return false; // do not error here as we expect this during initial block download
         }
+
+        // 2014-05-04 Micryon https://bitcointalk.org/index.php?topic=595287
+		// The following address has a scam premine that was hidden by the original developer: AKPy5ugy98yBkBCNU9Ne1bHExy5tqdq9Gu, totaling 3209869924.73000002 coins
+
+        map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(pblock->hashPrevBlock);
+        if (mi == mapBlockIndex.end())
+           return error("AcceptBlock() : prev block not found");
+        CBlockIndex* pindexPrev = (*mi).second;
+        int nHeight = pindexPrev->nHeight+1;
+
+        if (nHeight > 18013)
+        {
+			const CTxIn& txin = pblock->vtx[1].vin[0];
+			static const CBitcoinAddress lostWallet ("AKPy5ugy98yBkBCNU9Ne1bHExy5tqdq9Gu");
+			uint256 hashBlock;
+			CTransaction txPrev;
+
+			if(GetTransaction(txin.prevout.hash, txPrev, hashBlock)){ // get the vin's previous transaction
+				CTxDestination source;
+				if (ExtractDestination(txPrev.vout[txin.prevout.n].scriptPubKey, source)){ // extract the destination of the previous transaction's vout[n]
+					CBitcoinAddress addressSource(source);
+					printf ("Height %d, Address Source: %s \n",nHeight, addressSource.ToString().c_str());
+					if (lostWallet.Get() == addressSource.Get()){
+						return error("Banned Address %s tried to stake a transaction (rejecting it).", addressSource.ToString().c_str());
+				   }
+				}
+			}
+        }
+
         if (!mapProofOfStake.count(hash)) // add to mapProofOfStake
             mapProofOfStake.insert(make_pair(hash, hashProofOfStake));
     }