CTC for next job

I am living in Kochi and my current CTC is 5.4lakhs. I have only been in my current job for 7 months and I have experience of 4 years. Recently I saw a job notification for a new job in a company where one of my friends works. Position is for Sr.Full stack dev. Even though I am really good at React, redux and javascript, It has been 2 years since I worked with node.js as a background and MySQL as db. I am confident that I can get the job done in backend. My issue is how much should I ask them as my CTC. Can it go upto 10lakhs or should I be contempt with 8 lakhs, I'm really troubled here. Can anyone help.