diff options
Diffstat (limited to 'src/wallet/spend.h')
| -rw-r--r-- | src/wallet/spend.h | 41 |
1 files changed, 23 insertions, 18 deletions
diff --git a/src/wallet/spend.h b/src/wallet/spend.h index 7467dd9fa3..268bcfc033 100644 --- a/src/wallet/spend.h +++ b/src/wallet/spend.h @@ -101,29 +101,34 @@ std::map<CTxDestination, std::vector<COutput>> ListCoins(const CWallet& wallet) std::vector<OutputGroup> GroupOutputs(const CWallet& wallet, const std::vector<COutput>& outputs, const CoinSelectionParams& coin_sel_params, const CoinEligibilityFilter& filter, bool positive_only); /** - * Shuffle and select coins until nTargetValue is reached while avoiding - * small change; This method is stochastic for some inputs and upon - * completion the coin set and corresponding actual target value is - * assembled - * param@[in] coins Set of UTXOs to consider. These will be categorized into - * OutputGroups and filtered using eligibility_filter before - * selecting coins. - * param@[out] setCoinsRet Populated with the coins selected if successful. - * param@[out] nValueRet Used to return the total value of selected coins. + * Attempt to find a valid input set that meets the provided eligibility filter and target. + * Multiple coin selection algorithms will be run and the input set that produces the least waste + * (according to the waste metric) will be chosen. + * + * param@[in] wallet The wallet which provides solving data for the coins + * param@[in] nTargetValue The target value + * param@[in] eligilibity_filter A filter containing rules for which coins are allowed to be included in this selection + * param@[in] coins The vector of coins available for selection prior to filtering + * param@[in] coin_selection_params Parameters for the coin selection + * returns If successful, a SelectionResult containing the input set + * If failed, a nullopt */ -bool AttemptSelection(const CWallet& wallet, const CAmount& nTargetValue, const CoinEligibilityFilter& eligibility_filter, std::vector<COutput> coins, - std::set<CInputCoin>& setCoinsRet, CAmount& nValueRet, const CoinSelectionParams& coin_selection_params); +std::optional<SelectionResult> AttemptSelection(const CWallet& wallet, const CAmount& nTargetValue, const CoinEligibilityFilter& eligibility_filter, std::vector<COutput> coins, + const CoinSelectionParams& coin_selection_params); /** - * Select a set of coins such that nValueRet >= nTargetValue and at least + * Select a set of coins such that nTargetValue is met and at least * all coins from coin_control are selected; never select unconfirmed coins if they are not ours - * param@[out] setCoinsRet Populated with inputs including pre-selected inputs from - * coin_control and Coin Selection if successful. - * param@[out] nValueRet Total value of selected coins including pre-selected ones - * from coin_control and Coin Selection if successful. + * param@[in] wallet The wallet which provides data necessary to spend the selected coins + * param@[in] vAvailableCoins The vector of coins available to be spent + * param@[in] nTargetValue The target value + * param@[in] coin_selection_params Parameters for this coin selection such as feerates, whether to avoid partial spends, + * and whether to subtract the fee from the outputs. + * returns If successful, a SelectionResult containing the selected coins + * If failed, a nullopt. */ -bool SelectCoins(const CWallet& wallet, const std::vector<COutput>& vAvailableCoins, const CAmount& nTargetValue, std::set<CInputCoin>& setCoinsRet, CAmount& nValueRet, - const CCoinControl& coin_control, CoinSelectionParams& coin_selection_params) EXCLUSIVE_LOCKS_REQUIRED(wallet.cs_wallet); +std::optional<SelectionResult> SelectCoins(const CWallet& wallet, const std::vector<COutput>& vAvailableCoins, const CAmount& nTargetValue, const CCoinControl& coin_control, + const CoinSelectionParams& coin_selection_params) EXCLUSIVE_LOCKS_REQUIRED(wallet.cs_wallet); /** * Create a new transaction paying the recipients with a set of coins |