74 lines
2.1 KiB
C++
74 lines
2.1 KiB
C++
/********************************************************************
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* (C) 2018 Michael Toutonghi
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*
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* Distributed under the MIT software license, see the accompanying
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* file COPYING or http://www.opensource.org/licenses/mit-license.php.
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*
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* This supports code to catch nothing at stake cheaters who stake
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* on multiple forks.
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*
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*/
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#ifndef CHEATCATCHER_H
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#define CHEATCATCHER_H
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#include <vector>
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#include "streams.h"
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#include "script/script.h"
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#include "uint256.h"
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#include <vector>
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#include <map>
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class CTxHolder
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{
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public:
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uint256 utxo;
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uint32_t height;
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CTransaction tx;
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CTxHolder(const CTransaction &_tx, uint32_t _height) : height(_height), tx(_tx) {
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CVerusHashWriter hw = CVerusHashWriter(SER_GETHASH, PROTOCOL_VERSION);
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hw << tx.vin[0].prevout.hash;
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hw << tx.vin[0].prevout.n;
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utxo = hw.GetHash();
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}
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};
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class CCheatList
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{
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private:
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std::multimap<const int32_t, CTxHolder> orderedCheatCandidates;
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std::multimap<const uint256, CTxHolder *> indexedCheatCandidates;
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CCriticalSection cs_cheat;
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public:
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CCheatList() {}
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// prune all transactions in the list below height
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uint32_t Prune(uint32_t height);
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// check to see if a transaction that could be a cheat for the passed transaction is in our list
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bool IsCheatInList(const CTransaction &tx, CTransaction *pcheatTx);
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// check to see if there are cheat candidates of the same or greater block height in list
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bool IsHeightOrGreaterInList(uint32_t height)
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{
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auto range = orderedCheatCandidates.equal_range(height);
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return (range.first == orderedCheatCandidates.end());
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}
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// add a potential cheat transaction to the list. we do this for all stake transactions from orphaned stakes
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bool Add(CTxHolder &txh);
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// remove a transaction from the the list
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void Remove(const CTxHolder &txh);
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};
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extern CCheatList cheatList;
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extern boost::optional<libzcash::SaplingPaymentAddress> cheatCatcher;
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#endif |