doc: Mempool Policy documentation Outdated since TRUC #32067

1. 
   polespinasa commented at 12:22 pm on March 14, 2025: contributor

   Checking the policy documentation I think I noticed that some things are outdated since Version 3 transaction relay / TRUC.

   Some sentences like:

   Note: Package feerate cannot be used to meet the minimum relay feerate (-minrelaytxfee) requirement. For example, if the mempool minimum feerate is 5sat/vB and the minimum relay feerate is set to 5satvB, a 1sat/vB parent transaction with a high-feerate child will not be accepted, even if submitted as a package.

   Are no longer true. If I’m not wrong, in this specific case, you can now submit 0 feerate transactions and still be accepted.

   Probably there’s more documentation outdated on this section worth to review.

2. polespinasa renamed this:
   Doc: Mempool Policy documentation Outdated since TRUC
   doc: Mempool Policy documentation Outdated since TRUC
   on Mar 14, 2025
3. 
   fanquake commented at 1:51 am on March 17, 2025: member

   cc @glozow
4. willcl-ark added the label Docs on Mar 19, 2025
5. willcl-ark added the label TX fees and policy on Mar 19, 2025
6. willcl-ark added the label Mempool on Mar 19, 2025
7. 
   instagibbs commented at 7:30 am on July 31, 2025: member

   You are correct that this no longer holds with TRUC. The caveat can be added.
8. 
   glozow commented at 1:06 pm on July 31, 2025: member

   Right, this ended up in BIP431 but not our docs, which is not very clear.

   An individual TRUC transaction is permitted to be below the mempool min relay feerate, assuming it is considered within a package that meets the mempool’s feerate requirements.

   Happy to review a pull or I can open one

9. 
   polespinasa commented at 6:46 pm on August 19, 2025: contributor

   Went ahead and opened a PR #33220 as draft to not create much noise. @glozow feel free to review and suggest text :)
10. glozow closed this on Sep 3, 2025

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11. glozow referenced this in commit 689a321976 on Sep 3, 2025

Contributors
polespinasa fanquake instagibbs glozow

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Docs TX fees and policy Mempool