Encyclopedia DeFi · Entry 328
Batch-auction swaps: how orders can settle together
In this article
At a glance
Key facts
| Fact | Detail | Source |
|---|---|---|
| Intents | Users specify trade conditions in signed messages. | [1] |
| Residual demand | Solvers can use AMMs and other liquidity sources. | [1] |
| Pricing scope | Uniform directional clearing-price rules apply within each solution, with stated exceptions. | [2] |
Net part of the demand
In a simplified batch, one user sells 10 A for B while another wants to buy 7 A using B. A compatible solution can match the opposing demand for 7 A and source execution for the remaining 3 A elsewhere. Prices, fees and both users’ limits must still be satisfied.
This illustrates matching, not a guarantee that a solver will choose that arrangement or settle the entire batch.
Read the current auction rules
CoW’s retrieved rules distinguish smart-contract checks, off-chain competition rules and governance-enforced conduct. Limit-price checks are not the same as a promise that every economically possible improvement is found.
The current rules allow multiple winning solutions under a combinatorial selection process. Do not carry forward an oversimplified claim that every trade in every batch has exactly the same price.
A solution must reach the chain
A solver proposal is not a completed transfer. The selected execution still needs valid settlement within its applicable conditions and deadline. Quote, order submission, solver selection and settlement are separate checkpoints a reader should distinguish.
Direct answers
Questions people ask
Can a batch execute without directly matching two users?
Yes. Solvers can use outside liquidity when a coincidence of wants is absent or insufficient.
Inspect the evidence
The answer and key facts have stable claim links. These records retain the scope and qualification when reused.
A batch-auction swap groups trade intents so solvers can propose joint execution. Opposing user demand may match directly, while remaining demand uses other liquidity. CoW’s current competition rules enforce order limits and solution-level pricing constraints; batching does not mean every order is filled or that all winning solutions share one universal price.
Scope: DeFi · data through 2026-10-02. Verification: verified · 2026-10-02T19:18:00.092Z.
Link to this claimIntents: Users specify trade conditions in signed messages.
Scope: DeFi · data through 2026-10-02. Verification: verified · 2026-10-02T19:18:00.092Z.
Link to this claimResidual demand: Solvers can use AMMs and other liquidity sources.
Scope: DeFi · data through 2026-10-02. Verification: verified · 2026-10-02T19:18:00.092Z.
Link to this claimPricing scope: Uniform directional clearing-price rules apply within each solution, with stated exceptions.
Scope: DeFi · data through 2026-10-02. Verification: verified · 2026-10-02T19:18:00.092Z.
Link to this claimRevision history
- — First publication after primary-source research and separate automated verification.
Source register
Sources and references
Retrieval dates and locators are recorded individually.- CoW ProtocolCoW Protocol
How solvers source and settle batches.
Locator: Intents; batch auctions; solvers; liquidity sources · Version / scope: Documentation retrieved for the 2026-10-02 editorial scope; content hash recorded · Retrieved: 2026-10-02T18:53:20.051ZOpen source - Solver competition rulesCoW Protocol
Current solution-level constraints, without asserting one global price across all auction winners.
Locator: Uniform directed clearing prices; valid solutions · Version / scope: Documentation retrieved for the 2026-10-02 editorial scope; content hash recorded · Retrieved: 2026-10-02T18:53:20.066ZOpen source
Research and drafting use AI assistance. A separate automated review checks claims against primary sources; no external expert or named human review is implied. Publication, substantive editing, source retrieval and verification are recorded separately. This version was independently checked by an automated reviewer on 2 October 2026.
Editorial method and correctionsDegrees of Satoshi editorial project. “Batch-auction swaps: how orders can settle together.” Published 2026-10-02; updated 2026-10-02. https://degreesofsatoshi.com/encyclopedia/batch-auction-swaps/