Te Aratohu Katoa ki CowSwap
Learn how CoW Protocol's batch auctions and solver competition protect your trades from MEV, remove the need to pay gas yourself, and return price improvements to you.
He aha te CowSwap?
CowSwap is the main trading interface for CoW Protocol, where CoW stands for Coincidence of Wants. It is an intent-based decentralized exchange (DEX) protocol. On a classic DEX, your trade executes immediately against an on-chain liquidity pool. On CowSwap, orders are collected, matched and settled together in batches.
When you trade on CowSwap, you sign an off-chain message that states what you want to sell, what you want to buy and the minimum amount you will accept. Third parties called solvers then compete to find the best way to fill your order. This competition, combined with peer-to-peer matching, gives you MEV protection and lets you trade without paying gas yourself.
CoW Protocol launched in 2021 and is governed by CoW DAO. As of September 2026, its contracts are deployed on Ethereum mainnet, Gnosis Chain, Arbitrum, Base, Avalanche, Polygon, BNB Chain, Optimism and Linea, among others; the current list is in the CoW Protocol docs (see Sources). Cumulative trading volume is published on the CoW Protocol site.
Hokohoko i runga i te Whāinga
Sign what you want to trade, not how. Solvers compete to find the execution path for every order.
MEV Kua Tiakina
Batch auctions and off-chain orders remove the front-running and sandwich attacks described on ethereum.org (see Sources).
Ngā whakawhiti kore hinu
No ETH needed to place an order. Solvers pay the transaction cost, and a network fee is included in the execution price.
Me pēhea te mahi a CowSwap
CowSwap rests on three ideas: batch auctions, Coincidence of Wants (CoW), and solver competition. Together they form a trading model that differs from the automated market maker (AMM) model used by Uniswap.
Ngā Hokohoko Rōpū
Instead of processing trades one by one as they arrive (as Uniswap or SushiSwap do), CoW Protocol collects orders over a short time window and settles them in a single on-chain transaction called a batch. Within a batch, all trades on the same token pair receive the same clearing price. No trader gets a worse deal for being later in the queue.
This removes the first-come, first-served ordering that MEV bots exploit. Because orders in a batch settle at one price, there is no profit in reordering them.
He ōritenga o ngā hiahia (CoW)
The feature the protocol is named after, Coincidence of Wants, matches orders directly between traders when possible. If Alice wants to swap ETH for USDC and Bob wants to swap USDC for ETH in the same batch, their orders can be matched peer-to-peer without touching an AMM pool.
A CoW match avoids AMM pool fees and price impact. In practice, partial matches are common: part of an order is filled peer-to-peer, and the rest is routed to on-chain liquidity.
Ngā whakataetae Kaiwhakawā
Once a batch is collected, solvers compete in an auction to settle it. Each solver proposes a solution: how to fill each order, which liquidity sources to use (Uniswap, Balancer, Curve, private market makers and others), and how to route the trades.
The solver whose solution gives traders the most surplus wins the batch. Surplus is the difference between the price you accepted and the price you actually got. If a solver finds a better price than your limit, the difference goes to you, not to the solver. Solvers are paid by the protocol for winning, so they compete to deliver more value to users.
Tiaki MEV: Me pēhea te CowSwap e tiaki i ō hokohoko
Maximal Extractable Value (MEV) is a hidden cost of trading on decentralized exchanges. Bots watch the Ethereum mempool for pending swaps and extract value by front-running (placing a buy ahead of yours to push the price up) and sandwich attacks (buying before and selling after your trade to capture the price impact you create). Ethereum.org and Flashbots document these attacks and their scale (see Sources).
CowSwap protects against them through several layers of design.
Tuku Pārauranga i waho o te aho
Orders are signed off-chain and do not enter the public mempool as pending transactions. Bots cannot see them to front-run them.
Utu Whakapūmau Kotahi
Ka whakatau katoa ngā tono i roto i te rōpū ki te utu kotahi. Kāore he painga ki te whakarārangi anō i ngā whakawhitinga nā te mea kāore te utu e whakawhirinaki ki te tūnga.
Tautuhi Tūhonohono
CoW matches bypass AMM pools. When trades are matched directly between users, there is no pool trade for bots to exploit.
Tae ki ngā Kaihokohoko
Price improvements found by solvers go to the trader. Value that a bot would otherwise capture is returned to the user, minus the protocol fee set by CoW DAO.
Ngā āhuatanga matua o CowSwap
Tauhokohoko kore hinu
You do not pay gas for a swap. You sign an off-chain message, which costs nothing. The solver that wins the batch pays the gas to settle on-chain and is repaid through a network fee included in your execution price.
Once a token is approved, you can trade it with no ETH in your wallet. This helps users who hold only ERC-20 tokens. Selling native ETH still requires an on-chain transaction, because ETH cannot be moved by signature alone.
Whakapai ake i te nui rawa
When a solver finds a better price than your limit, the surplus is returned to you. For example, if you agree to sell 0.5 ETH for at least 1,000 USDC and the solver executes at a price that yields 1,020 USDC, you keep the extra 20 USDC (less the protocol fee on surplus, where it applies).
Competition between solvers is what produces this surplus. The CoW Protocol docs explain how surplus and fees are calculated (see Sources).
Uru Mōrearea
CowSwap supports limit orders that cost no gas to place or cancel. They are signed off-chain and execute only when a solver can fill them at your price or better. You can also place time-weighted average price (TWAP) orders, which split a large trade into parts executed over time to reduce price impact.
Ngā Hook CoW
CoW Hooks let you attach on-chain actions before or after a swap. For example, you can claim rewards, unwrap WETH or deposit into a vault in the same settlement as your swap. This makes CowSwap a useful building block for DeFi automation.
Me pēhea te hokohoko i CowSwap
Follow these steps to place your first MEV-protected swap.
Hono tō pūkete
Visit swap.cow.fi and connect a wallet such as MetaMask, Rabby, a WalletConnect wallet or a hardware wallet. Select the network you want to trade on; the supported networks are listed in the CoW Protocol docs.
Tīpakohia ngā Tokana & Te Rahi
Choose the token you want to sell and the token you want to buy, then enter the amount. CowSwap shows a price quote, the fee, and the minimum amount you will receive after your slippage tolerance.
Whakaaetia te Token (Mō te wā tuatahi anake)
The first time you sell a token on CowSwap, you approve the CoW Protocol vault relayer contract to move that token. This is a one-time on-chain transaction per token, and it costs gas. After that, swaps of that token need only a signature.
Hainatia te Tono
Click "Swap" and sign the order in your wallet. This is a gasless signature (EIP-712 typed data) that defines your order. The order is then submitted to the CoW Protocol order book.
Tatari mō te Whakapūmau
Solvers include your order in an upcoming batch. Settlement usually takes from under a minute to a few minutes, depending on the network. You can follow the order on the CoW Explorer. If no solver can fill it at your limit price before it expires, nothing is charged.
Te Tohu COW
COW is the governance token of CoW DAO. It launched in 2022 with a total supply of 1 billion tokens, per the CoW DAO documentation. Live supply and market data are on CoinGecko (see Sources).
Whakahaere
COW holders vote on protocol upgrades, fee parameters, treasury spending and solver bonding rules through CoW DAO proposals, discussed on the forum and voted on Snapshot.
Hononga Kaiwhakawāhi
Solvers must post a bond to take part in the auction. The bond can be slashed if a solver breaks the rules, which aligns solvers with users. The bond size and assets are set by CoW DAO.
Utu Whiwhinga
CoW Protocol charges a protocol fee on trades. How that revenue is used (treasury, buybacks, incentives) is decided by CoW DAO governance; the current policy is on the forum.
CowSwap ki Uniswap ki 1inch
How does CowSwap compare with a leading AMM and a leading aggregator? The table summarises the main design differences; check each project's docs for current features.
| Āhuatanga | CowSwap | Uniswap | 1inch |
|---|---|---|---|
| Tauira Hokohoko | Hokohoko rōpū + kaiwhakawātea | AMM (hua pūmau) | Kaiwhakakotahi DEX |
| Tiaki MEV | Kua whakaurua | Optional (UniswapX) | Optional (Fusion) |
| Utu Hāora | Kore hāora | User pays (AMM swaps) | Gasless in Fusion mode |
| Tae ki te Kaihokohoko | Āe | No (AMM swaps) | Depends on mode |
| Uru Mōrearea | Gasless to place | Via UniswapX | Āe |
| Ngā Tono TWAP | Motu | Kāo | Kāo |
| Ngā Aho Ka tautokohia | Ethereum, Gnosis, Arbitrum, Base and others (see docs) | Many EVM chains (see docs) | Many EVM chains (see docs) |
| Whakapāheketanga (Hooks) | Ngā Hook CoW | Hooks v4 | Kāo |
Āhuatanga Matatau
Beyond simple swaps, CoW Protocol offers features aimed at developers, DAOs and advanced users.
Ngā Hook CoW
CoW Hooks let you attach pre-swap and post-swap actions to an order. A pre-hook might withdraw tokens from a vault, and a post-hook might deposit the output into a lending protocol. The actions run in the same settlement transaction as the swap. Use cases include:
- Tono i ngā utu whakatūpato, ka whakawhiti wawe ki tētahi moni pūmau
- Hono ngā tōken mai i L2 ki Ethereum, ka whakawhiti ka tuku ki Aave
- Waiho te WETH ki ETH i muri i te whakawhiti
- Whakaaetia tētahi tōken, ka whakawhiti i te hononga kotahi
Ngā Utu Hōtaka
Smart contracts can place orders on CoW Protocol through the programmatic order framework. This lets DAOs, treasuries and protocols automate trades. TWAP (time-weighted average price) orders split a large trade into smaller parts over time to reduce price impact.
Milkman is a contract built on CoW Protocol that lets a treasury submit a trade whose price is checked against an on-chain oracle at execution time, so the trade only settles at a fair market price.
CoW AMM
CoW AMM is an automated market maker designed to reduce loss-versus-rebalancing (LVR), the loss liquidity providers suffer when arbitrageurs trade against stale pool prices. In a classic AMM, that arbitrage profit goes to bots. In CoW AMM, the pool is rebalanced inside the CoW Protocol batch auction, and solvers compete to give the pool the best price.
Whether this improves returns for a given pool depends on the assets and market conditions. CoW DAO publishes pool data on its site; check it before providing liquidity.
Ngā Pātai Auau
He haumaru te CowSwap ki te whakamahi?
Me pēhea te tiaki a CowSwap i te MEV?
Me utu au i ngā utu hinu i CowSwap?
He aha te COW token e whakamahia ana mō?
Me pēhea te rerekētanga o CowSwap i te Uniswap?
Haere tonu ki te ako
Explore more guides on DeFi protocols and trading.
Uniswap ki CowSwap
Whakataurite tata i ngā tauira DEX e rua: AMM ki hokohoko rōpū.
Pānui WhakatauriteBalancer Aratohu
Ako mō ngā pūreke taumaha, tokenomics o BAL, me ngā rautaki waiwai whakawhanaketanga i runga i Balancer.
Pānui AratohuAratohu Morpho
Mā te Morpho Blue, whakapai ake i te kāri. Whakatauranga tangata ki te tangata, ngā whare paku, me te whakapai ake o ngā reiti.
Pānui AratohuWhakakotahitia tō mātauranga DeFi ki te mahi
After swapping tokens on CowSwap, you can place your USDC in Coinstancy Dollar Savings at 7.50% APY. Interest accrues every second and is automatically reinvested. No lock-up; you can request a withdrawal at any time.
Tīmata te whiwhi moni i te CoinstancyNgā puna me ngā pānuitanga atu anō
Ka whakawhirinaki ngā tatauranga me ngā kerēme o tēnei whārangi ki ngā tuhinga kei raro nei. Ka neke ngā tatauranga pā ki te wā (reiti, hua, utu, raraunga mākete): tirohia te uara ora i te puna i mua i te mahi.
- Tuhinga CoW Protocoldocs.cow.fi
How batch auctions, Coincidence of Wants, solvers, surplus, CoW Hooks and programmatic orders work.
- CoW Protocol documentation, core contractsdocs.cow.fi
The list of networks on which CoW Protocol contracts are deployed, as of September 2026.
- CoW Protocol contracts repository (GitHub)github.com
Open source settlement contracts and the published audit reports.
- CoW DAO forumforum.cow.fi
Governance proposals on fees, solver bonding and treasury use decided by COW holders.
- Ethereum.org, Uara tino tangohia (MEV)ethereum.org
Definitions of MEV, front-running and sandwich attacks used in this guide.
- 1inch developer documentationbusiness.1inch.com
Aggregation and intent-based swaps at 1inch, for the comparison table.
I arotakea whakamutunga: Mahuru 2026. Ka whakatuwheratia ngā hononga o waho ki tētahi tihopa hou; kāore a Coinstancy e whai kawenga mō ō rātou ihirangi.
Ready to Trade with MEV Protection?
Use CowSwap for MEV-protected trades, then earn 7.50% APY on your USDC with Coinstancy Dollar Savings.