Intent-Based Trading
Intent-based trading is a transaction paradigm in decentralized finance where users specify the desired outcome of a trade — such as receiving at least a certain amount of a target token by a deadline — rather than prescribing the exact execution path, and delegate finding the optimal route to competitive third-party solvers who compete to fill the order.
Traditional on-chain trading requires users to specify the exact sequence of steps to execute a swap: which liquidity pools to use, the exact amounts, slippage tolerance, and the gas price. This creates friction, exposes users to maximal extractable value (MEV) attacks from block builders who can front-run or sandwich transactions, and demands technical knowledge that most users lack.
Intent-based systems shift the model. A user signs a message expressing what they want — for example, to sell one Ether and receive at least 3,200 USDC within the next ten minutes — and broadcasts this intent to a network of solvers. Solvers are sophisticated actors who analyze the intent and compete to fill it through whatever combination of liquidity sources (DEX aggregators, private market makers, cross-chain routes) produces the best outcome. The solver who submits the winning fill receives a fee, and the user is guaranteed at least the minimum output specified in the intent.
This architecture has several important advantages. Because users sign intents rather than transactions, they do not need to hold gas tokens on the specific chain being traded on — solvers can handle cross-chain gas internally. Solvers competing for order flow have strong incentives to find the best possible execution, often achieving better outcomes than a user routing manually. And because the intent is not a raw transaction in the public mempool, many traditional MEV attacks become harder to execute.
Prominent intent-based protocols include CoW Protocol (which uses batch auctions and coincidence-of-wants matching), UniswapX, 1inch Fusion, and the Across Protocol for cross-chain intents. SUAVE (developed by Flashbots) and Anoma represent more comprehensive intent architectures that extend the model beyond simple swaps.
In the U.S. regulatory environment, solvers that route orders may face scrutiny as to whether they constitute broker-dealers under SEC rules, particularly if they exercise discretion over order routing and receive compensation. The SEC has historically applied Reg NMS and best-execution standards to traditional market structure; whether analogous standards will be applied to DeFi solvers is an open and actively debated question as the agency considers new digital asset market structure rules.