src/wallet/feebumper.h

   1 // Copyright (c) 2017 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_FEEBUMPER_H
   6 #define BITCOIN_WALLET_FEEBUMPER_H
   7
   8 #include <primitives/transaction.h>
   9
  10 class CWallet;
  11 class CWalletTx;
  12 class uint256;
  13 class CCoinControl;
  14 enum class FeeEstimateMode;
  15
  16 enum class BumpFeeResult
  17 {
  18     OK,
  19     INVALID_ADDRESS_OR_KEY,
  20     INVALID_REQUEST,
  21     INVALID_PARAMETER,
  22     WALLET_ERROR,
  23     MISC_ERROR,
  24 };
  25
  26 class CFeeBumper
  27 {
  28 public:
  29     CFeeBumper(const CWallet *pWalletIn, const uint256 txidIn, const CCoinControl& coin_control, CAmount totalFee);
  30     BumpFeeResult getResult() const { return currentResult; }
  31     const std::vector<std::string>& getErrors() const { return vErrors; }
  32     CAmount getOldFee() const { return nOldFee; }
  33     CAmount getNewFee() const { return nNewFee; }
  34     uint256 getBumpedTxId() const { return bumpedTxid; }
  35
  36     /* signs the new transaction,
  37      * returns false if the tx couldn't be found or if it was
  38      * impossible to create the signature(s)
  39      */
  40     bool signTransaction(CWallet *pWallet);
  41
  42     /* commits the fee bump,
  43      * returns true, in case of CWallet::CommitTransaction was successful
  44      * but, eventually sets vErrors if the tx could not be added to the mempool (will try later)
  45      * or if the old transaction could not be marked as replaced
  46      */
  47     bool commit(CWallet *pWalletNonConst);
  48
  49 private:
  50     bool preconditionChecks(const CWallet *pWallet, const CWalletTx& wtx);
  51
  52     const uint256 txid;
  53     uint256 bumpedTxid;
  54     CMutableTransaction mtx;
  55     std::vector<std::string> vErrors;
  56     BumpFeeResult currentResult;
  57     CAmount nOldFee;
  58     CAmount nNewFee;
  59 };
  60
  61 #endif // BITCOIN_WALLET_FEEBUMPER_H