I am considering using bcash made by Purse.io, since it can run in SPV mode. I will check if I can query the tx fee in this mode. If the fee is below 1 sat/b ....
.... I will set a waiting screen for 1 confirmation.
Take in mind that a low fee tx could take days to confirm!
Hm. I guess it would then be better to send the same coins back and then show a message that they should try again and pay a higher fee.
