text: // Copyright (c) 2009-2017 The Bitcoin Core developers
  // Copyright (c) 2018-2018 The VERGE Core developers
  // Distributed under the MIT software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #ifndef VERGE_WALLET_COINSELECTION_H
  #define VERGE_WALLET_COINSELECTION_H
  
  #include <amount.h>
  #include <primitives/transaction.h>
  #include <random.h>
  
  //! target minimum change amount
  static const CAmount MIN_CHANGE = CENT;
  //! final minimum change amount after paying for fees
  static const CAmount MIN_FINAL_CHANGE = MIN_CHANGE/2;
  
  class CInputCoin {
  public:
      CInputCoin(const CTransactionRef& tx, unsigned int i)
      {
          if (!tx)
              throw std::invalid_argument("tx should not be null");
          if (i >= tx->vout.size())
              throw std::out_of_range("The output index is out of range");
  
          outpoint = COutPoint(tx->GetHash(), i);
          txout = tx->vout[i];
          effective_value = txout.nValue;
      }
  
      COutPoint outpoint;
      CTxOut txout;
      CAmount effective_value;
      CAmount fee = 0;
      CAmount long_term_fee = 0;
  
      bool operator<(const CInputCoin& rhs) const {
          return outpoint < rhs.outpoint;
      }
  
      bool operator!=(const CInputCoin& rhs) const {
          return outpoint != rhs.outpoint;
      }
  
      bool operator==(const CInputCoin& rhs) const {
          return outpoint == rhs.outpoint;
      }
  };
  
  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);
  
  // Original coin selection algorithm as a fallback
  bool KnapsackSolver(const CAmount& nTargetValue, std::vector<CInputCoin>& vCoins, std::set<CInputCoin>& setCoinsRet, CAmount& nValueRet);
  #endif // VERGE_WALLET_COINSELECTION_H
  