kernel: chainparams updates for 26.x #28591

1. 
   fanquake commented at 4:19 PM on October 4, 2023: member

   Update chainparams pre 26.x branch off.

   Note: Remember that some variance is expected in the m_assumed_* sizes.

   Closes #28572.

2. fanquake added this to the milestone 26.0 on Oct 4, 2023
3. 
   DrahtBot commented at 4:19 PM on October 4, 2023: contributor

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   Conflicts

   Reviewers, this pull request conflicts with the following ones:

   • #26201 (Remove Taproot activation height by Sjors)

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4. DrahtBot added the label Validation on Oct 4, 2023
5. 
   ajtowns commented at 10:59 PM on October 4, 2023: contributor

   ACK 817c7cd020c8e4a7e1787bce2e1a2f1d11e91b5f

   Consider merging #25970 first and also doing the steps there, perhaps? Can easily be deferred 'til after branch off and next release though.

6. Sjors approved
7. 
   Sjors commented at 10:27 AM on October 5, 2023: member

   ACK 817c7cd020c8e4a7e1787bce2e1a2f1d11e91b5f

   See release-process.md for how to verify these numbers.

8. kernel: update nMinimumChainWork & defaultAssumeValid for 26.x a9d070a6f8
9. kernel: update chainTxData for 26.x a8c2e5e556
10. kernel: update m_assumed_* chain params for 26.x f12f92b813
11. headerssync: update params for 26.x b2ede22395
12. fanquake force-pushed on Oct 5, 2023
13. 
    fanquake commented at 10:41 AM on October 5, 2023: member

    Consider merging #25970 first and also doing the steps there, perhaps?

    Incorporated this. We haven't changed the values since the initial merge. Updating now seems ok.

14. 
    maflcko commented at 11:35 AM on October 5, 2023: member

    nit: Could update https://github.com/bitcoin/bitcoin/blob/master/doc/release-process.md#before-branch-off to bump the example pull to https://github.com/bitcoin/bitcoin/pull/28591, as the process now includes a new step?

15. 
    fanquake commented at 12:41 PM on October 5, 2023: member

    nit: Could update https://github.com/bitcoin/bitcoin/blob/master/doc/release-process.md#before-branch-off to bump the example pull

    Included this now.

16. 
    darosior commented at 1:58 PM on October 5, 2023: member

    ACK 100b7c9b6713aa32281077b0bed6d8daecdc20be -- only checked assumevalid and minimum chain work, not header sync params.

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17. DrahtBot requested review from ajtowns on Oct 5, 2023
18. DrahtBot requested review from Sjors on Oct 5, 2023
19. doc: update example pulls in release-process.md bd71f03df7
20. 
    Sjors commented at 3:04 PM on October 5, 2023: member

    ACK 100b7c9b6713aa32281077b0bed6d8daecdc20be

    Also ran the headerssync-params.py script.

21. DrahtBot removed review request from Sjors on Oct 5, 2023
22. fanquake force-pushed on Oct 5, 2023
23. 
    Sjors commented at 3:10 PM on October 5, 2023: member

    re-ACK bd71f03df75d2c17926b6d575ffa886daa334e3a

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24. DrahtBot requested review from darosior on Oct 5, 2023
25. 
    ajtowns commented at 6:48 PM on October 5, 2023: contributor

    reACK bd71f03df75d2c17926b6d575ffa886daa334e3a

26. DrahtBot removed review request from ajtowns on Oct 5, 2023
27. 
    darosior commented at 1:55 PM on October 8, 2023: member

    re-ACK bd71f03df75d2c17926b6d575ffa886daa334e3a for assumevalid and minchainwork params.

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28. DrahtBot removed review request from darosior on Oct 8, 2023
29. fanquake merged this on Oct 9, 2023
30. fanquake closed this on Oct 9, 2023

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31. fanquake deleted the branch on Oct 9, 2023
32. Frank-GER referenced this in commit 447e0f0c04 on Oct 13, 2023
33. Bbjj88h approved
34. 
    dr8931240-ux commented at 9:27 PM on July 25, 2025: none

    Complete

35. delta1 referenced this in commit d01090d0df on Aug 7, 2025

Contributors

fanquakeDrahtBotajtownsSjorsmaflckodarosiorBbjj88hdr8931240-ux

Milestone
26.0