It seems good for preventing an UTXO bloat by restricting max number of outputs of TX(or block) can have. Is there such a restriction? if there is, which part of source code should I read? If not, why not?
I have an ESTA for the US, valid until Mar 20, 2020. I have confirmed the ESTA is still valid on the U.S. Customs and Border Protection site. However, the airline I have a flight booked with will not allow me to check in online due to not having a valid ESTA/VISA/etc.
Does this mean I’m not going to be allowed on the flight or is it simply a problem with the online check-in? And if I’m allowed on the flight, should I expect issues on arrival in the US?