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fb716f7b25
Moves the current coin selection algorithm out of SelectCoinsMinConf
and puts it in coinselection.{cpp,h}. The new function, KnapsackSolver,
instead of taking a vector of COutputs, will take a vector of CInputCoins
that is prepared by SelectCoinsMinConf.
54 lines
1.7 KiB
C++
54 lines
1.7 KiB
C++
// Copyright (c) 2017 The Bitcoin Core developers
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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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#ifndef BITCOIN_COINSELECTION_H
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#define BITCOIN_COINSELECTION_H
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#include <amount.h>
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#include <primitives/transaction.h>
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#include <random.h>
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//! target minimum change amount
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static const CAmount MIN_CHANGE = CENT;
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//! final minimum change amount after paying for fees
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static const CAmount MIN_FINAL_CHANGE = MIN_CHANGE/2;
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class CInputCoin {
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public:
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CInputCoin(const CTransactionRef& tx, unsigned int i)
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{
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if (!tx)
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throw std::invalid_argument("tx should not be null");
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if (i >= tx->vout.size())
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throw std::out_of_range("The output index is out of range");
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outpoint = COutPoint(tx->GetHash(), i);
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txout = tx->vout[i];
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effective_value = txout.nValue;
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}
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COutPoint outpoint;
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CTxOut txout;
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CAmount effective_value;
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CAmount fee = 0;
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CAmount long_term_fee = 0;
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bool operator<(const CInputCoin& rhs) const {
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return outpoint < rhs.outpoint;
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}
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bool operator!=(const CInputCoin& rhs) const {
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return outpoint != rhs.outpoint;
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}
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bool operator==(const CInputCoin& rhs) const {
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return outpoint == rhs.outpoint;
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}
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};
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bool SelectCoinsBnB(std::vector<CInputCoin>& utxo_pool, const CAmount& target_value, const CAmount& cost_of_change, std::set<CInputCoin>& out_set, CAmount& value_ret, CAmount not_input_fees);
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// Original coin selection algorithm as a fallback
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bool KnapsackSolver(const CAmount& nTargetValue, std::vector<CInputCoin>& vCoins, std::set<CInputCoin>& setCoinsRet, CAmount& nValueRet);
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#endif // BITCOIN_COINSELECTION_H
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