Eco has opened its Sauce transaction engine to external developers, enabling them to build transactions with programmable constraints. Transactions created through the SDK can enforce a maximum price limit, set a minimum return floor, and restrict execution to a whitelist of approved destinations. If any condition is not met, the transaction fails outright rather than executing partially. The launch supports Ethereum, Solana, and Base networks. The conditional execution model gives developers atomic guarantees that a swap or transfer will only complete when all specified parameters are satisfied.