The CoW AMM integration into Tycho has taken longer than expected, mainly due to delays in the integration process. A lot of time went into debugging LP token swap logic and resolving tricky testing issues, which pushed this off the original schedule.
The good news is that the heavy lifting is done and we’re back on track. You can follow progress directly here:
Hi,
Thanks kindly for the update on this matter. The grants committee are happy to see work resume on the grant. Please however not that extensions are subject to the committee’s discretion and we would very much like to see concrete deliverables in the milestones within 30 days
If there is anyway we can help with reviews please be sure to ask!
@tanayj Hi, we’re just kindly following up as to the progress of this grant if you can please provide an update on the go-live period of time that you mentioned?
Thanks for the follow-up. Here’s a brief progress update on the integration:
Since the last update
The integration advanced through the main Tycho SDK PR (#191) and the cowamm-execution repository.
While nearing completion, the bounty hunter’s implementation still had several gaps. Our review identified:
• Non-standard crate setup and redundant local copies of CoW crates.
• Unnecessary orderbook posting logic within the encoder.
• Inconsistent project structure and undefined references affecting build reliability.
• Solver interface types that limited compatibility with Tycho’s runtime.
We’ve shared detailed feedback and recommendations, and the contributor is currently implementing the fixes.
The revised timeline is that we expect the integration to be live and complete by the end of November. We’ll share another update once the revised version is merged.
We appreciate the committee’s patience and understanding. Please let us know if you have feedback on the implementation. We’ll share another update once the revised version is merged.
Since the last post, the core structural and encoding work was in place, but the Tycho test suite surfaced issues that required deeper fixes. To keep the integration moving, we stepped in alongside the bounty hunter and took on a substantial portion of the remaining implementation.
What the tests revealed
• Bind() liquidity arrives before the pool is formally created, leading to balance mismatches in Tycho’s model.
• Duplicate balance deltas and ordinal collisions.
• Simulation not producing quotes until indexing was corrected.
• Indexer diverging slightly from RPC state when replaying deeper history.
What’s now fixed
• Bind deltas are re-anchored to pool creation so Tycho reconstructs state correctly.
• Store logic updated to prevent duplicates and ordinal clashes.
• Execution tests now pass end-to-end.
• All balance-changing events are now handled (binds, joins, exits, LP changes, trades).
What’s left
A small indexing drift still appears when replaying very deep history (~2.18 wstETH on one pool). It doesn’t affect quoting, but we want to close this out before calling the integration complete.
Timeline
We expect the integration to be finished by December 15 (latest).
We’ll share another update early next week. We’d like to thank to the committee for their continued support and understanding.
Thanks for the update and for keeping progress moving forward as of late. Please drop us another update next week re: status, given we’re close to the 12/15 target date.
