(Suggestion) Choose lower fee if the amount to be sent is small

[i-rme]

I'll be brief, suppose this case:

Bob wants to send 10 USD to Alice. (2.2 mBTC)
Bitcoin Core estimates fee in 2.5mBTC/kB to be confirmed in the next 2 blocks. (That is 3.80 USD for 300 bytes).
As fee is more than 10% of the sent amount, Bitcoin Core should choose a lower fee for this single transaction.
Bitcoin Core chooses the 11 block fee, that is 0.6mBTC/kB to be confirmed in the next 11 blocks (That is 0.93 USD for 300 bytes).
Bitcoin Core displays a warning to Bob explaining the situation.

Bob pays lower transaction fee (9% fee Vs 38% fee). Bob is happy.

This should be the default behaviour, the user can later change the fee if he wants to.

TL;DR: Make Bitcoin Core aware of the amount sent and lower the fees if it is more than 10% of sent amount.

[AllanDoensen]

Fees are bitcoins biggest issue. But this is just going to cause the small transactions to never confirm.

[i-rme]

It will confirm in 11 blocks, that is the recommended fee from Core. El 3 sept. 2017 12:55, "Allan Doensen" <notifications@github.com> escribió:

…

Fees are bitcoins biggest issue. But this is just going to cause the small transactions to never confirm. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#11223 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AFuruQd_b1AGSp75Y2g4QuZxnGEaA5ABks5seoWtgaJpZM4PLJcp> .

[AllanDoensen]

It may confirm in 11 blocks, it may confirm next weekend when the mempool goes down, or it may never confirm causing Bob to have to change/add an extra tx to get it unblocked.