diff options
Diffstat (limited to 'src/wallet/spend.cpp')
| -rw-r--r-- | src/wallet/spend.cpp | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/src/wallet/spend.cpp b/src/wallet/spend.cpp index 583c021b8f..21007f5a92 100644 --- a/src/wallet/spend.cpp +++ b/src/wallet/spend.cpp @@ -393,10 +393,13 @@ std::optional<SelectionResult> AttemptSelection(const CWallet& wallet, const CAm // The knapsack solver has some legacy behavior where it will spend dust outputs. We retain this behavior, so don't filter for positive only here. std::vector<OutputGroup> all_groups = GroupOutputs(wallet, coins, coin_selection_params, eligibility_filter, false /* positive_only */); + CAmount target_with_change = nTargetValue; // While nTargetValue includes the transaction fees for non-input things, it does not include the fee for creating a change output. - // So we need to include that for KnapsackSolver as well, as we are expecting to create a change output. - if (auto knapsack_result{KnapsackSolver(all_groups, nTargetValue + coin_selection_params.m_change_fee, - coin_selection_params.m_min_change_target, coin_selection_params.rng_fast)}) { + // So we need to include that for KnapsackSolver and SRD as well, as we are expecting to create a change output. + if (!coin_selection_params.m_subtract_fee_outputs) { + target_with_change += coin_selection_params.m_change_fee; + } + if (auto knapsack_result{KnapsackSolver(all_groups, target_with_change, coin_selection_params.m_min_change_target, coin_selection_params.rng_fast)}) { knapsack_result->ComputeAndSetWaste(coin_selection_params.m_cost_of_change); results.push_back(*knapsack_result); } @@ -405,7 +408,7 @@ std::optional<SelectionResult> AttemptSelection(const CWallet& wallet, const CAm // barely meets the target. Just use the lower bound change target instead of the randomly // generated one, since SRD will result in a random change amount anyway; avoid making the // target needlessly large. - const CAmount srd_target = nTargetValue + coin_selection_params.m_change_fee + CHANGE_LOWER; + const CAmount srd_target = target_with_change + CHANGE_LOWER; if (auto srd_result{SelectCoinsSRD(positive_groups, srd_target, coin_selection_params.rng_fast)}) { srd_result->ComputeAndSetWaste(coin_selection_params.m_cost_of_change); results.push_back(*srd_result); @@ -756,7 +759,8 @@ static std::optional<CreatedTransactionResult> CreateTransactionInternal( // vouts to the payees if (!coin_selection_params.m_subtract_fee_outputs) { - coin_selection_params.tx_noinputs_size = 11; // Static vsize overhead + outputs vsize. 4 nVersion, 4 nLocktime, 1 input count, 1 output count, 1 witness overhead (dummy, flag, stack size) + coin_selection_params.tx_noinputs_size = 10; // Static vsize overhead + outputs vsize. 4 nVersion, 4 nLocktime, 1 input count, 1 witness overhead (dummy, flag, stack size) + coin_selection_params.tx_noinputs_size += GetSizeOfCompactSize(vecSend.size()); // bytes for output count } for (const auto& recipient : vecSend) { |