STONfi SDK has long been the leading SDK on the $TON blockchain for the implementation of swap functions within applications that require it. Also, this Software Development Kit provides the best user experience for developers, as you can find both a demo application and a well-thought-out guide on Guthub.STONfi
SDK already uses MyTonWallet, Tonkeeper, TON Wallet and other popular TON blockchain application
Yes, the same swap inside Tonkeeper is implemented using STONfi SDK, and for example, in TON Wallet swap occurs using the Omniston protocol, so it also has zero slippage and the best quote from all blockchain solvers is selected.
The peculiarity of Omniston is that it can interact even with SwapCoffee, which can form complex chains for swap.
