Decentralized finance has evolved far beyond simple token swaps. Today, a growing number of DeFi platforms use intent-based trading, a model that focuses on what users want to achieve instead of forcing them to decide exactly how a trade should be executed.
Behind the scenes, specialized participants known as solvers compete to deliver the best possible outcome by searching across decentralized exchanges, centralized exchanges, private liquidity, and even multiple blockchains. This approach not only improves pricing but also helps reduce one of DeFi’s biggest problems—MEV (Maximal Extractable Value) attacks.
Why traditional DeFi swaps have limitations
In conventional decentralized exchanges, users submit transactions directly to an automated market maker (AMM). The transaction specifies every detail, including which liquidity pool to use, the minimum acceptable output, and the execution deadline.
While this process works, it comes with several drawbacks:
- Transactions become visible in the public mempool before execution.
- MEV bots can monitor pending trades and perform sandwich attacks.
- Users often receive less favorable prices because liquidity is fragmented across multiple platforms.
- Every transaction requires its own gas fee, even when similar trades occur simultaneously.
What is an intent?
An intent is simply a signed message that describes the outcome a user wants instead of the exact execution process.
For example, instead of instructing a protocol to swap 1 ETH through a specific liquidity pool, a user can simply state:
“Swap 1 ETH for at least 3,200 USDC.”
The protocol then leaves the execution details to professional market participants known as solvers. Since intents remain off-chain until settlement, they are hidden from public mempool bots, providing greater protection against MEV attacks.
How solvers execute trades
Solvers are specialized entities that compete to fulfill user intents.
When an intent is submitted:
- The protocol broadcasts it to registered solvers.
- Each solver searches for the most efficient execution route.
- Solvers may combine liquidity from multiple decentralized exchanges, centralized exchanges, private inventories, or even cross-chain sources.
- They submit competing bids.
- The protocol selects the best offer, and the trade is settled on-chain.
Because multiple solvers compete against each other, users often receive better prices than they would through traditional AMM swaps.
How intent-based trading reduces MEV
One of the biggest advantages of intent-based systems is their resistance to Maximal Extractable Value (MEV).
Traditional blockchain transactions sit in the public mempool before confirmation, allowing bots to monitor pending trades and front-run or sandwich users.
Intent-based protocols avoid this issue because user intentions remain off-chain until execution. Since bots cannot see these transactions in advance, opportunities for MEV extraction are significantly reduced.
Leading intent-based protocols
CoW Protocol
CoW Protocol pioneered the intent model using batch auctions.
Instead of processing trades individually, it groups multiple user orders together and looks for opportunities to directly match buyers and sellers. This “coincidence of wants” often produces better prices while reducing gas costs for everyone involved.
UniswapX
UniswapX extends Uniswap by allowing users to submit intents instead of direct swaps.
Its Dutch auction model encourages solvers to compete quickly, while a fallback mechanism ensures users always receive at least the standard Uniswap price if no solver provides a better offer.
Across Protocol
Across applies the intent model to cross-chain transfers.
Instead of waiting for traditional bridge confirmations, relayers instantly provide liquidity on the destination chain using their own funds before later claiming reimbursement. This dramatically reduces bridge times while simplifying the user experience.
ERC-7683 aims to standardize intents
Today, different protocols use different intent formats, preventing solvers from competing across every platform.
The proposed ERC-7683 standard aims to solve this problem by creating a universal intent format that any protocol can adopt. A standardized system could increase competition among solvers and improve pricing for users across the entire DeFi ecosystem.
Challenges of intent-based trading
Although intent-based protocols offer significant benefits, they also introduce new considerations.
Some of the main challenges include:
- A relatively small number of large solvers often win most auctions.
- Batch auctions can introduce slight execution delays.
- Users rely on settlement contracts to enforce the promised outcome.
- Off-chain intent submission introduces some censorship considerations.
- Regulatory treatment of solver networks remains uncertain.
Tips before using an intent-based protocol
Before using any intent-based trading platform, users should:
- Compare quoted prices with traditional DEX swaps.
- Understand what happens if no solver fills the intent.
- Set reasonable minimum output requirements.
- Verify that settlement contracts have undergone reputable security audits.
- Consider total trading costs, including gas fees and execution quality.
The future of intent-based DeFi
Intent-based trading is expanding beyond simple token swaps. Developers are already working on multi-step intents that combine swaps, lending, borrowing, and staking into a single transaction.
Artificial intelligence is also beginning to play a role, with AI-powered solvers optimizing liquidity routes and predicting market conditions more efficiently. At the same time, wallet providers are increasingly integrating intent-based execution, allowing users to benefit from better pricing without needing to understand the underlying technology.
As standards like ERC-7683 mature and solver competition grows, intent-based trading could become the default method for executing transactions across decentralized finance.
