From 5fc381e443d6d967e6f7f8bc88a4fd66e18379eb Mon Sep 17 00:00:00 2001 From: Andrew Chow Date: Thu, 4 Feb 2021 19:11:24 -0500 Subject: [PATCH] wallet: Move discard feerate fetching to CreateTransaction Instead of fetching the discard feerate for each SelectCoinsMinConf iteration, fetch and cache it once during CreateTransaction so that it is shared for each SelectCoinsMinConf through coin_selection_params.m_discard_feerate. Does not change behavior. Github-Pull: #21083 Rebased-From: bdd0c2934b7f389ffcfae3b602ee3ecee8581acd --- src/bench/coin_selection.cpp | 2 +- src/wallet/test/coinselector_tests.cpp | 8 ++++---- src/wallet/wallet.cpp | 9 +++++---- src/wallet/wallet.h | 4 +++- 4 files changed, 13 insertions(+), 10 deletions(-) diff --git a/src/bench/coin_selection.cpp b/src/bench/coin_selection.cpp index 1ef89a41d..df277dc2f 100644 --- a/src/bench/coin_selection.cpp +++ b/src/bench/coin_selection.cpp @@ -52,7 +52,7 @@ static void CoinSelection(benchmark::Bench& bench) const CoinEligibilityFilter filter_standard(1, 6, 0); const CoinSelectionParams coin_selection_params(/* use_bnb= */ true, /* change_output_size= */ 34, /* change_spend_size= */ 148, /* effective_fee= */ CFeeRate(0), - /* long_term_feerate= */ CFeeRate(0), + /* long_term_feerate= */ CFeeRate(0), /* discard_feerate= */ CFeeRate(0), /* tx_no_inputs_size= */ 0); bench.run([&] { std::set setCoinsRet; diff --git a/src/wallet/test/coinselector_tests.cpp b/src/wallet/test/coinselector_tests.cpp index f375ce02a..4686ecdf8 100644 --- a/src/wallet/test/coinselector_tests.cpp +++ b/src/wallet/test/coinselector_tests.cpp @@ -37,7 +37,7 @@ CoinEligibilityFilter filter_confirmed(1, 1, 0); CoinEligibilityFilter filter_standard_extra(6, 6, 0); CoinSelectionParams coin_selection_params(/* use_bnb= */ false, /* change_output_size= */ 0, /* change_spend_size= */ 0, /* effective_fee= */ CFeeRate(0), - /* long_term_feerate= */ CFeeRate(0), + /* long_term_feerate= */ CFeeRate(0), /* discard_feerate= */ CFeeRate(0), /* tx_no_inputs_size= */ 0); static void add_coin(const CAmount& nValue, int nInput, std::vector& set) @@ -267,7 +267,7 @@ BOOST_AUTO_TEST_CASE(bnb_search_test) // Make sure that effective value is working in SelectCoinsMinConf when BnB is used CoinSelectionParams coin_selection_params_bnb(/* use_bnb= */ true, /* change_output_size= */ 0, /* change_spend_size= */ 0, /* effective_fee= */ CFeeRate(3000), - /* long_term_feerate= */ CFeeRate(1000), + /* long_term_feerate= */ CFeeRate(1000), /* discard_feerate= */ CFeeRate(1000), /* tx_no_inputs_size= */ 0); CoinSet setCoinsRet; CAmount nValueRet; @@ -640,11 +640,11 @@ BOOST_AUTO_TEST_CASE(SelectCoins_test) // Perform selection CoinSelectionParams coin_selection_params_knapsack(/* use_bnb= */ false, /* change_output_size= */ 34, /* change_spend_size= */ 148, /* effective_fee= */ CFeeRate(0), - /* long_term_feerate= */ CFeeRate(0), + /* long_term_feerate= */ CFeeRate(0), /* discard_feerate= */ CFeeRate(0), /* tx_no_inputs_size= */ 0); CoinSelectionParams coin_selection_params_bnb(/* use_bnb= */ true, /* change_output_size= */ 34, /* change_spend_size= */ 148, /* effective_fee= */ CFeeRate(0), - /* long_term_feerate= */ CFeeRate(0), + /* long_term_feerate= */ CFeeRate(0), /* discard_feerate= */ CFeeRate(0), /* tx_no_inputs_size= */ 0); CoinSet out_set; CAmount out_value = 0; diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp index b1951c0c3..a3216a33a 100644 --- a/src/wallet/wallet.cpp +++ b/src/wallet/wallet.cpp @@ -2363,7 +2363,7 @@ bool CWallet::SelectCoinsMinConf(const CAmount& nTargetValue, const CoinEligibil std::vector utxo_pool; if (coin_selection_params.use_bnb) { // Calculate cost of change - CAmount cost_of_change = GetDiscardRate(*this).GetFee(coin_selection_params.change_spend_size) + coin_selection_params.effective_fee.GetFee(coin_selection_params.change_output_size); + CAmount cost_of_change = coin_selection_params.m_discard_feerate.GetFee(coin_selection_params.change_spend_size) + coin_selection_params.effective_fee.GetFee(coin_selection_params.change_output_size); // Filter by the min conf specs and add to utxo_pool and calculate effective value for (OutputGroup& group : groups) { @@ -2805,7 +2805,8 @@ bool CWallet::CreateTransactionInternal( CTxOut change_prototype_txout(0, scriptChange); coin_selection_params.change_output_size = GetSerializeSize(change_prototype_txout); - CFeeRate discard_rate = GetDiscardRate(*this); + // Set discard feerate + coin_selection_params.m_discard_feerate = GetDiscardRate(*this); // Get the fee rate to use effective values in coin selection coin_selection_params.effective_fee = GetMinimumFeeRate(*this, coin_control, &feeCalc); @@ -2924,7 +2925,7 @@ bool CWallet::CreateTransactionInternal( // Never create dust outputs; if we would, just // add the dust to the fee. // The nChange when BnB is used is always going to go to fees. - if (IsDust(newTxOut, discard_rate) || bnb_used) + if (IsDust(newTxOut, coin_selection_params.m_discard_feerate) || bnb_used) { nChangePosInOut = -1; nFeeRet += nChange; @@ -2976,7 +2977,7 @@ bool CWallet::CreateTransactionInternal( if (nChangePosInOut == -1 && nSubtractFeeFromAmount == 0 && pick_new_inputs) { unsigned int tx_size_with_change = nBytes + coin_selection_params.change_output_size + 2; // Add 2 as a buffer in case increasing # of outputs changes compact size CAmount fee_needed_with_change = coin_selection_params.effective_fee.GetFee(tx_size_with_change); - CAmount minimum_value_for_change = GetDustThreshold(change_prototype_txout, discard_rate); + CAmount minimum_value_for_change = GetDustThreshold(change_prototype_txout, coin_selection_params.m_discard_feerate); if (nFeeRet >= fee_needed_with_change + minimum_value_for_change) { pick_new_inputs = false; nFeeRet = fee_needed_with_change; diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h index 65b57396b..20ee63e4a 100644 --- a/src/wallet/wallet.h +++ b/src/wallet/wallet.h @@ -608,17 +608,19 @@ struct CoinSelectionParams size_t change_spend_size = 0; CFeeRate effective_fee = CFeeRate(0); CFeeRate m_long_term_feerate; + CFeeRate m_discard_feerate; size_t tx_noinputs_size = 0; //! Indicate that we are subtracting the fee from outputs bool m_subtract_fee_outputs = false; CoinSelectionParams(bool use_bnb, size_t change_output_size, size_t change_spend_size, CFeeRate effective_fee, - CFeeRate long_term_feerate, size_t tx_noinputs_size) : + CFeeRate long_term_feerate, CFeeRate discard_feerate, size_t tx_noinputs_size) : use_bnb(use_bnb), change_output_size(change_output_size), change_spend_size(change_spend_size), effective_fee(effective_fee), m_long_term_feerate(long_term_feerate), + m_discard_feerate(discard_feerate), tx_noinputs_size(tx_noinputs_size) {} CoinSelectionParams() {}