Hi, I have another question. In electrum btc I sometimes get a message about fee rounding when i send coins. I would increase the fee when i see that message because i get scared that my transaction will be lost. Is it necessary to increase my fee? It claims it's for privacy but i wonder if that message only shows up when sending amount is too low? i cant find much info in google. thanks
Oh, you mean "Output value rounding".
It's actually there to just round up the amount to nearest hundred satoshi.
You can send it as it is without rounding & it will still go through but it's better to round up the amount.
The code for it is here:
https://github.com/spesmilo/electrum/blob/3.1.1/lib/coinchooser.py#L160