hey guys how using @ton/ton npm packages can I instantiate the sTON dex contract?

https://tonscan.org/address/EQB3ncyBUTjZUA5EnFKR5_EnOMI9V1tTEAAPaiU71gc4TiUt#source

I see in the source that I can pass an ABI but where do I get that ABI? 🤔

if someone can just point me to a cookie cutter example of listening to swap events on the sTON contract that would be really helpful