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Use hash after transaction was mined

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- Prevents an attacker from gaming which masternodes they'll use
This commit is contained in:
Evan Duffield 2015-02-04 13:25:12 -07:00
parent 712eb7e9d9
commit 2a0d3dfb9d
1 changed files with 8 additions and 2 deletions
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8
src/instantx.cpp
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@ -63,7 +63,13 @@ void ProcessMessageInstantX(CNode* pfrom, std::string& strCommand, CDataStream&
return; return;
} }
} }
int nBlockHeight = chainActive.Tip()->nHeight - nTxAge; //calculate the height
/*
Use a blockheight newer than the input.
This prevents attackers from using transaction mallibility to predict which masternodes
they'll use.
*/
int nBlockHeight = (chainActive.Tip()->nHeight - nTxAge)+4;
BOOST_FOREACH(const CTxOut o, tx.vout){ BOOST_FOREACH(const CTxOut o, tx.vout){
if(!o.scriptPubKey.IsNormalPaymentScript()){ if(!o.scriptPubKey.IsNormalPaymentScript()){