[28.x] More backports #33535

1. 
   fanquake commented at 3:18 pm on October 3, 2025: member

   Backports:

   • #33504
2. fuzz: don't bypass_limits for most mempool harnesses

   Using bypass_limits=true is essentially fuzzing part of a
   reorg only, and results in TRUC invariants unable to be
   checked. Remove most instances of bypassing limits, leaving
   one harness able to do so.
   
   Github-Pull: #33504
   Rebased-From: bbe8e9063c15dc230553e0cbf16d603f5ad0e4cf

   ffffdc4e97
3. Mempool: Do not enforce TRUC checks on reorg

   Not enforcing TRUC topology on reorg was the intended
   behavior, but the appropriate bypass argument was not
   checked.
   
   This mistake means we could potentially invalidate a long
   chain of perfectly incentive-compatible transactions that
   were made historically, including subsequent non-TRUC
   transactions, all of which may have been very high feerate.
   
   Lastly, it wastes CPU cycles doing topology checks since
   this behavior cannot actually enforce the topology in
   general for the reorg setting.
   
   Github-Pull: #33504
   Rebased-From: 26e71c237d9d2197824b547f55ee3a0a60149f92

   05f4aa7662
4. test: add more TRUC reorg coverge

   Github-Pull: #33504
   Rebased-From: 06df14ba75be5f48cf9c417424900ace17d1cf4d

   11da80fe6a
5. doc: update release notes for 28.x 06fe49dc88
6. fanquake added this to the milestone 28.3 on Oct 3, 2025
7. DrahtBot added the label Backport on Oct 3, 2025
8. 
   DrahtBot commented at 3:18 pm on October 3, 2025: contributor

   The following sections might be updated with supplementary metadata relevant to reviewers and maintainers.

   Code Coverage & Benchmarks

   For details see: https://corecheck.dev/bitcoin/bitcoin/pulls/33535.

   Reviews

   See the guideline for information on the review process.

   Type	Reviewers
   ACK	darosior, dergoegge, instagibbs

   If your review is incorrectly listed, please react with 👎 to this comment and the bot will ignore it on the next update.

   LLM Linter (✨ experimental)

   Possible typos and grammar issues:

   • do not do TRUC invariants checks -> do not perform TRUC invariant checks [plural/syntax error: “invariants checks” is ungrammatical; “perform” is clearer than repeated “do”]

   drahtbot_id_5_m

9. darosior approved
10. 
    darosior commented at 5:27 pm on October 3, 2025: member

    utACK 06fe49dc88638e2ad21f1b7d0dd87661de384517.
11. dergoegge approved
12. 
    dergoegge commented at 3:23 am on October 4, 2025: member

    ACK 06fe49dc88638e2ad21f1b7d0dd87661de384517
13. instagibbs approved
14. 
    instagibbs commented at 4:19 pm on October 6, 2025: member

    ACK 06fe49dc88638e2ad21f1b7d0dd87661de384517
15. fanquake marked this as ready for review on Oct 7, 2025
16. fanquake merged this on Oct 7, 2025
17. fanquake closed this on Oct 7, 2025

    ---

18. fanquake deleted the branch on Oct 7, 2025

Contributors
fanquake DrahtBot darosior dergoegge instagibbs

Labels
Backport

Milestone
28.3