Intent-based decentralized exchanges emerge as alternative to automated market maker model

Intent-based decentralized exchanges are emerging as a major alternative to traditional automated market makers (AMMs). By separating a trader's desired outcome from the execution details, these protocols route transactions off-chain to a competitive network of solvers. This architecture addresses structural AMM limitations like slippage, impermanent loss, and frontrunning. Leading protocols like UniswapX, which has processed over $30 billion, and CoW Protocol, handling $1 billion weekly, leverage Dutch auctions and batch matching to protect traders from MEV extraction and offer gasless execution.

Intent-based DEX architecture

• ▪In intent-based decentralized exchanges, traders authorize tokens for spending via a settlement contract but do not move them until a third-party solver fills the order.
• ▪Intent-based decentralized exchanges separate a trader's desired outcome from the execution details by utilizing signed off-chain messages called intents.
• ▪Intent-based decentralized exchanges allow for gasless swaps where the solver pays the on-chain gas fee and embeds that cost into the final execution price.

AMM structural limitations

• ▪Automated market makers expose traders to sandwich attacks in public mempools and subject liquidity providers to impermanent loss when market prices shift.
• ▪Automated market makers rely on fixed pricing curves, such as the constant product formula, which cause slippage on large orders to prevent liquidity pools from being drained.

Solver competition mechanisms

• ▪Solvers can match opposing user trades directly through a coincidence of wants, eliminating slippage, pool fees, and public mempool exposure.
• ▪Solvers in intent-based systems compete to fill user intents by routing through automated market maker pools, utilizing private inventory, or accessing centralized exchange liquidity.

UniswapX Dutch auctions

• ▪UniswapX uses a Dutch auction mechanism where the order price starts slightly above market rate and declines over a 12-to-60-second window until a solver fills it.
• ▪UniswapX processed over $30 billion in cumulative trading volume within its first year of operation.

CoW Protocol batch matching

• ▪CoW Protocol collects user intents within a batch window of approximately 30 seconds and runs a solver competition to maximize the aggregate surplus.
• ▪CoW Protocol regularly handles over $1 billion in weekly trading volume across the Ethereum and Gnosis Chain networks.

MEV protection methods

• ▪Intent-based decentralized exchanges protect traders from maximal extractable value by keeping signed transaction messages off-chain and invisible to public mempool searchers.
• ▪The Dutch auction mechanism in intent-based protocols ensures that any surplus value generated during execution flows back to the trader rather than block builders.