Line data    Source code

       1             : // Copyright (c) 2011-2021 The Bitcoin Core developers
       2             : // Distributed under the MIT software license, see the accompanying
       3             : // file COPYING or http://www.opensource.org/licenses/mit-license.php.
       4             : 
       5             : #ifndef BITCOIN_WALLET_COINCONTROL_H
       6             : #define BITCOIN_WALLET_COINCONTROL_H
       7             : 
       8             : #include <key.h>
       9             : #include <policy/feerate.h>
      10             : #include <policy/fees.h>
      11             : #include <primitives/transaction.h>
      12             : #include <script/keyorigin.h>
      13             : #include <script/signingprovider.h>
      14             : #include <script/standard.h>
      15             : 
      16             : #include <algorithm>
      17             : #include <map>
      18             : #include <optional>
      19             : #include <set>
      20             : 
      21             : namespace wallet {
      22             : enum class CoinType : uint8_t
      23             : {
      24             :     ALL_COINS,
      25             :     ONLY_FULLY_MIXED,
      26             :     ONLY_READY_TO_MIX,
      27             :     ONLY_NONDENOMINATED,
      28             :     ONLY_MASTERNODE_COLLATERAL, // find masternode outputs including locked ones (use with caution)
      29             :     ONLY_COINJOIN_COLLATERAL,
      30             :     // Attributes
      31             :     MIN_COIN_TYPE = ALL_COINS,
      32             :     MAX_COIN_TYPE = ONLY_COINJOIN_COLLATERAL,
      33             : };
      34             : 
      35             : //! Default for -avoidpartialspends
      36             : static constexpr bool DEFAULT_AVOIDPARTIALSPENDS = false;
      37             : 
      38             : const int DEFAULT_MIN_DEPTH = 0;
      39             : const int DEFAULT_MAX_DEPTH = 9999999;
      40             : 
      41             : /** Coin Control Features. */
      42          78 : class CCoinControl
      43             : {
      44             : public:
      45             :     //! Custom change destination, if not set an address is generated
      46             :     CTxDestination destChange = CNoDestination();
      47             :     //! If false, only safe inputs will be used
      48             :     bool m_include_unsafe_inputs = false;
      49             :     //! If true, the selection process can add extra unselected inputs from the wallet
      50             :     //! while requires all selected inputs be used
      51             :     bool m_allow_other_inputs = false;
      52             :     //! If false, only include as many inputs as necessary to fulfill a coin selection request. Only usable together with m_allow_other_inputs
      53             :     bool fRequireAllInputs = true;
      54             :     //! Includes watch only addresses which are solvable
      55             :     bool fAllowWatchOnly = false;
      56             :     //! Override automatic min/max checks on fee, m_feerate must be set if true
      57             :     bool fOverrideFeeRate = false;
      58             :     //! Override the wallet's m_pay_tx_fee if set
      59             :     std::optional<CFeeRate> m_feerate;
      60             :     //! Override the discard feerate estimation with m_discard_feerate in CreateTransaction if set
      61             :     std::optional<CFeeRate> m_discard_feerate;
      62             :     //! Override the default confirmation target if set
      63             :     std::optional<unsigned int> m_confirm_target;
      64             :     //! Avoid partial use of funds sent to a given address
      65             :     bool m_avoid_partial_spends = DEFAULT_AVOIDPARTIALSPENDS;
      66             :     //! Forbids inclusion of dirty (previously used) addresses
      67             :     bool m_avoid_address_reuse = false;
      68             :     //! Fee estimation mode to control arguments to estimateSmartFee
      69             :     FeeEstimateMode m_fee_mode = FeeEstimateMode::UNSET;
      70             :     //! Minimum chain depth value for coin availability
      71             :     int m_min_depth = DEFAULT_MIN_DEPTH;
      72             :     //! Maximum chain depth value for coin availability
      73             :     int m_max_depth = DEFAULT_MAX_DEPTH;
      74             :     //! SigningProvider that has pubkeys and scripts to do spend size estimation for external inputs
      75             :     FlatSigningProvider m_external_provider;
      76             :     //! Controls which types of coins are allowed to be used (default: ALL_COINS)
      77             :     CoinType nCoinType = CoinType::ALL_COINS;
      78             : 
      79             :     CCoinControl(CoinType coin_type = CoinType::ALL_COINS);
      80             : 
      81             :     /**
      82             :      * Returns true if there are pre-selected inputs.
      83             :      */
      84             :     bool HasSelected() const;
      85             :     /**
      86             :      * Returns true if the given output is pre-selected.
      87             :      */
      88             :     bool IsSelected(const COutPoint& output) const;
      89             :     /**
      90             :      * Returns true if the given output is selected as an external input.
      91             :      */
      92             :     bool IsExternalSelected(const COutPoint& output) const;
      93             :     /**
      94             :      * Returns the external output for the given outpoint if it exists.
      95             :      */
      96             :     std::optional<CTxOut> GetExternalOutput(const COutPoint& outpoint) const;
      97             :     /**
      98             :      * Lock-in the given output for spending.
      99             :      * The output will be included in the transaction even if it's not the most optimal choice.
     100             :      */
     101             :     void Select(const COutPoint& output);
     102             :     /**
     103             :      * Lock-in the given output as an external input for spending because it is not in the wallet.
     104             :      * The output will be included in the transaction even if it's not the most optimal choice.
     105             :      */
     106             :     void SelectExternal(const COutPoint& outpoint, const CTxOut& txout);
     107             :     /**
     108             :      * Unselects the given output.
     109             :      */
     110             :     void UnSelect(const COutPoint& output);
     111             :     /**
     112             :      * Unselects all outputs.
     113             :      */
     114             :     void UnSelectAll();
     115             :     /**
     116             :      * List the selected inputs.
     117             :      */
     118             :     std::vector<COutPoint> ListSelected() const;
     119             :     /**
     120             :      * Set an input's weight.
     121             :      */
     122             :     void SetInputWeight(const COutPoint& outpoint, int64_t weight);
     123             :     /**
     124             :      * Returns true if the input weight is set.
     125             :      */
     126             :     bool HasInputWeight(const COutPoint& outpoint) const;
     127             :     /**
     128             :      * Returns the input weight.
     129             :      */
     130             :     int64_t GetInputWeight(const COutPoint& outpoint) const;
     131             : 
     132             :     // Dash-specific helpers
     133           0 :     void UseCoinJoin(bool fUseCoinJoin)
     134             :     {
     135           0 :         nCoinType = fUseCoinJoin ? CoinType::ONLY_FULLY_MIXED : CoinType::ALL_COINS;
     136           0 :     }
     137             : 
     138           0 :     bool IsUsingCoinJoin() const
     139             :     {
     140           0 :         return nCoinType == CoinType::ONLY_FULLY_MIXED;
     141             :     }
     142             : private:
     143             :     //! Selected inputs (inputs that will be used, regardless of whether they're optimal or not)
     144             :     std::set<COutPoint> m_selected_inputs;
     145             :     //! Map of external inputs to include in the transaction
     146             :     //! These are not in the wallet, so we need to track them separately
     147             :     std::map<COutPoint, CTxOut> m_external_txouts;
     148             :     //! Map of COutPoints to the maximum weight (equals to size) for that input
     149             :     std::map<COutPoint, int64_t> m_input_weights;
     150             : };
     151             : } // namespace wallet
     152             : 
     153             : #endif // BITCOIN_WALLET_COINCONTROL_H