Sundae V4 introduces Atomic Swaps. Multiple pools. One order. One transaction. Traditionally, routing a swap through multiple pools means executing each hop separately. Every hop introduces another transaction, another opportunity for slippage, and the risk of getting stuck holding a token you never intended to own. Atomic Swaps eliminate the gap between hops. You specify what you're swapping and the minimum you're willing to receive. V4's router finds the best path across its pools and executes the entire route in a single Cardano transaction. Every hop succeeds, or none execute. No partial fills. No stranded intermediate tokens. No exposure between transactions. You can see this in action on mainnet today. A USDCx → sUSDrf swap routes through two V4 pools, starting with @realfi_co's Linear USDCx/USDrf pool, and settles in a single transaction.