contrib, kernel: fixed seeds, chainparams, headerssync params, and assumeutxo updates pre-32.0 #36196

1. 
   achow101 commented at 6:03 AM on September 9, 2026: member

   All the updates per the release process, except asmap.

   Assumeutxo snapshots are available at https://achow101.com/files/utxo-snapshots/

2. contrib: Update makeseeds for 30.3 and 31.x 6385aa1df8
3. contrib: Update fixed seeds fcfc1df041
4. 
   DrahtBot commented at 6:03 AM on September 9, 2026: contributor

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   For details see: https://corecheck.dev/bitcoin/bitcoin/pulls/36196.

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5. 
   achow101 commented at 6:27 AM on September 9, 2026: member

   The asmap benchmark thinks that the address 3fff::1 belongs to AS16509. Not sure if the bug is in the asmap file or our parser.

   Edit:

   Hmm

   ::/2 AS16509
   

   I think it's the asmap file.

6. 
   sedited commented at 6:43 AM on September 9, 2026: contributor

   The last asmap generation was quite short notice, though a score of 10/14 reproductions is also not terrible. Might a backported run be warranted?

   And CC @fjahr and @jurraca for the CI problem.

7. kernel: update assumed blockchain and chainstate sizes 67726a63a4
8. kernel: update defaultAssumeValid and minimumChainWork a25511dfbc
9. kernel: update chainTxData 42d93d40de
10. kernel: Update headerssync params a2e1f48fd3
11. kernel: add recent assumeutxo snapshot 07b0183091
12. achow101 force-pushed on Sep 9, 2026
13. DrahtBot added the label CI failed on Sep 9, 2026
14. 
    achow101 commented at 6:44 AM on September 9, 2026: member

    Dropped the asmap update. I believe this is just an encoding issue where asmap-tool is not accounting for prefixes that are not supposed to be reachable. All asmaps more recent than the current embedding contain the problematic mapping.

15. achow101 renamed this:
    contrib, kernel: fixed seeds, asmap, chainparams, headerssync params, and assumeutxo updates pre-32.0
    contrib, kernel: fixed seeds, chainparams, headerssync params, and assumeutxo updates pre-32.0
    on Sep 9, 2026
16. 
    fjahr commented at 7:43 AM on September 9, 2026: contributor

    I am looking into it and working on a fix for handling it better in core. While we aren't filtering this new-ish RFC 9637 explicitly in kartograf I think the mapping is introduced by the --fill the encoding.

17. DrahtBot removed the label CI failed on Sep 9, 2026
18. 
    fjahr commented at 8:23 AM on September 9, 2026: contributor

    #36199 should fix the issue with the new file embedding, I open a follow-up on top that updates the embedded asmap

19. 
    fjahr commented at 8:43 AM on September 9, 2026: contributor

    #36201 should hopefully show that the CI is fixed through https://github.com/bitcoin/bitcoin/pull/36199

20. fanquake added this to the milestone 32.0 on Sep 9, 2026
21. sedited referenced this in commit ffe6aa57fe on Sep 9, 2026
22. 
    0xB10C commented at 2:29 PM on September 9, 2026: contributor

    While we aren't filtering this new-ish RFC 9637 explicitly in kartograf I think the mapping is introduced by the --fill the encoding.

    fwiw:

    • filled asmap: https://0xb10c.github.io/asmap-web/?ip=3fff::1&asmap=2026/1786032000_asmap.dat (AS16509 Amazon.com Inc.)
    • un-filled asmap: https://0xb10c.github.io/asmap-web/?ip=3fff::1&asmap=2026/1786032000_asmap_unfilled.dat (unmapped)

Contributors

achow101DrahtBotseditedfjahr0xB10C

Milestone
32.0