I need a very basic web-chat function in my website (php/js preferred)

Hey coding professionals, So, I'll be clear basically start ur bid with "Hey hermano" coz I hate the ones who bid without reading and then ask what to do and please include your estimated budget in that either in (INR or EURO or USD) also I am gonna hire the dev directly via his profile. Alright, now I want a very basic chat app where my users can chat to vendor via user panel and a mysqldb structure for my own work So, here is what i need 1. I want to keep 6 month chat history with lazy loading on chats having 50 messages or something loaded in one time. (don't think its gonna make a big load on server) 2. one can upload images with high level security check before going to server. 3. if u need a separate server to host the app i can provide that also but i think u can work with my server its really awesome, but i have a lot of things to work on so I can spend my work making a web-chat. 4. user can check if the message is checked or not by the other person. 5. it must of course not prone to any attack like injection, broken auth, Xss, anda all. 6. i would like almost all the info in ur bid, additionally i need it to be end-to-end encryption. (if ur bid is good enough we'll talk about it and howto's in chat later) 7. last thing send me two pricings with and without end-to-end encryption layers. 8. and I guess, since i said the db structure is for my own work so, i can't share it all so, just send me some examples of (sql dumps --> would be easier for you or if u can then db structures of any of your past projects so that i can actually see that u r the one i am finding. i hope u know what i wanna say) 8. might in future i need a video chat and calls also in this chat app so, make ur database a/c to that coz for that also I am gonna hire the same person and i dont want any complication later with db and all so, i hope u got it. don't see this pricing as I said this is just a demo project will hire you from your profile according to your pricing. thanks