doc: clarify that testnet min-difficulty is not optional #32095

pull Sjors wants to merge 1 commits into bitcoin:master from Sjors:2025/03/testnet-1 changing 1 files +1 −1
  1. Sjors commented at 8:01 AM on March 19, 2025: member

    When 20 minutes have gone by on testnet3 or testnet4, the next block MUST have difficulty 1. I've seen people be confused about this several times now in recent months. It doesn't help that the code comment is wrong. So fixing that.

    The reason is that nBits must match exactly:

    https://github.com/bitcoin/bitcoin/blob/e568c1dd134e0318c46113cb7dfc23b40e2829e8/src/validation.cpp#L4212-L4215

  2. doc: clarify that testnet min-difficulty is not optional 288481aabd
  3. DrahtBot commented at 8:01 AM on March 19, 2025: contributor

    <!--e57a25ab6845829454e8d69fc972939a-->

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

    <!--006a51241073e994b41acfe9ec718e94-->

    Code Coverage & Benchmarks

    For details see: https://corecheck.dev/bitcoin/bitcoin/pulls/32095.

    <!--021abf342d371248e50ceaed478a90ca-->

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  4. DrahtBot added the label Docs on Mar 19, 2025
  5. Sjors commented at 8:06 AM on March 19, 2025: member

    Note that there's a recent proposal to drop this rule entirely: https://gnusha.org/pi/bitcoindev/hU75DurC5XToqizyA-vOKmVtmzd3uZGDKOyXuE_ogE6eQ8tPCrvX__S08fG_nrW5CjH6IUx7EPrq8KwM5KFy9ltbFBJZQCHR2ThoimRbMqU=@protonmail.com/

  6. fjahr commented at 5:24 PM on March 19, 2025: contributor

    ACK 288481aabd77b90876489e39403b6eab9d4ae74d

  7. kevkevinpal commented at 2:46 AM on March 23, 2025: contributor

    ACK 288481a

  8. ryanofsky assigned ryanofsky on Mar 24, 2025
  9. ryanofsky merged this on Mar 24, 2025
  10. ryanofsky closed this on Mar 24, 2025
  11. sedited referenced this in commit a9c46ce3c3 on Apr 24, 2025
  12. stickies-v referenced this in commit 772a33e052 on May 23, 2025
  13. yuvicc referenced this in commit 069643f094 on Jul 6, 2025
  14. bug-castercv502 referenced this in commit 5b0af4b944 on Sep 28, 2025
  15. Kino1994 referenced this in commit d111b7bac3 on Jun 28, 2026
  16. BigcoinBGC referenced this in commit 5b40f2259c on Jun 30, 2026
  17. bitcoin locked this on Jul 30, 2026
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