WIP

[pompon0]

Draft proposal to change the layout of avail.State:

• instead of epochDuo, we keep previous epoch in Anchor, and current in inner.
• avail.State does NOT need to traverse through all the epochs - if a future anchor is received, it can jump to it as soon as data registry catches up.

Tests and code outside of avail/ was not updated yet. Persistence code (in particular PruneAnchor persistence) needs to be updated. Open questions:

• an asymmetry has been introduced: anchor epoch is stored in consensus, but "current" epoch is not and we rely on data.Registry to provide it. Eventually we will need to clarify the contract between those.

[github-actions]

The latest Buf updates on your PR. Results from workflow Buf / buf (pull_request).

Build	Format	Lint	Breaking	Updated (UTC)
✅ passed	✅ passed	✅ passed	✅ passed	Jul 31, 2026, 12:58 PM

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.41%. Comparing base (a13b120) to head (80a11fa).

❗ There is a different number of reports uploaded between BASE (a13b120) and HEAD (80a11fa). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (a13b120)	HEAD (80a11fa)
sei-chain-pr	1	0

Additional details and impacted files

@@                     Coverage Diff                     @@
##           wen/autobahn_epoch_trio    #3834      +/-   ##
===========================================================
- Coverage                    76.57%   70.41%   -6.17%     
===========================================================
  Files                           89        5      -84     
  Lines                         7799      463    -7336     
===========================================================
- Hits                          5972      326    -5646     
+ Misses                        1360      107    -1253     
+ Partials                       467       30     -437     

Flag	Coverage Δ
sei-chain-pr	?
sei-db	70.41% <ø> (ø)

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