in these countries(asia), usually if you break their contract, they report to their DCA and the DCA will be sure you never get a job again.
They call imigration office and can block you at the departure custom and bring you to justice with a stop of 3 months in a nice little cell that you will share with very nice mates.This apply only if you own money to a company.At Lion, I am sure they will be happy if you leave after 3 days, and they will keep your money.
Lion Air will be probably your final stop in your career, with all the bad habits learned there (like going below MDA or DH "tuck under"?), I am sure BA will be interested by you (sarcasm!!!), they are desperate for Lion Air pilots(double sarcasm!)