"coinselect" always expose the largest UTXO no matter how small the payment is because it sorts by descending value. #74
Description
This is a huge privacy issue.
It's exposing a larger balance than required to the recipient.
Why is it sorting by descending?
Unless it's doing something more advanced to solve that "knapsack' like problem.
It should first try to find the smallest single UTXO that is bigger than the sent amount by going up the list (asending)
If it didn't find any it should take the largest one and go back from to smallest until it finds one that is larger than what's missing. If not take 1st + 2nd largest and keep adding to it until total it's enough.