What is Swapper.sol?Swapper.sol is a smart contract that lets users swap one ERC-20 token for another using a decentralized exchange (DEX) like Uniswap. Think of it as a digital currency exchange booth: you give it one token, and it gives you another, all automatically and securely.How Do Token Swaps Work?On Uniswap, swapping tokens is like trading money at an airport currency exchange. You hand over dollars and get euros, based on the current rate. In Uniswap, you trade one token for another...