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bnb: exit selection when best_waste is 0

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If we find a solution which has no waste, just use that. This solution
is what we would consider to be optimal, and other solutions we find
would have to also have 0 waste, so they are equivalent to the first
one with 0 waste. Thus we can optimize by just choosing the first one
with 0 waste.
This commit is contained in:
Andrew Chow
2020-03-04 16:35:15 -05:00
parent a71c34742c
commit 9b5950db86
2 changed files with 6 additions and 4 deletions
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3
src/wallet/coinselection.cpp
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@@ -106,6 +106,9 @@ bool SelectCoinsBnB(std::vector<OutputGroup>& utxo_pool, const CAmount& target_v
best_selection = curr_selection;
best_selection.resize(utxo_pool.size());
best_waste = curr_waste;
if (best_waste == 0) {
break;
}
}
curr_waste -= (curr_value - actual_target); // Remove the excess value as we will be selecting different coins now
backtrack = true;