Update deployment for BIP65 #227

1. 
   btcdrak commented at 12:13 pm on October 23, 2015: contributor

   BIP65 is being deployed by IsSuperMajority. Updating this BIP to reflect this fact.
2. Update deployment for BIP65 3ab04a6562
3. 
   petertodd commented at 4:27 pm on October 23, 2015: contributor

   ACK

   Thanks for doing this for me!

4. in bip-0065.mediawiki: in 3ab04a6562

   280+66, with the same thresholds, but for nVersion = 4. The new rules are
   281+in effect for every block (at height H) with nVersion = 4 and at least
   282+750 out of 1000 blocks preceding it (with heights H-1000..H-1) also
   283+have nVersion = 4. Furthermore, when 950 out of the 1000 blocks
   284+preceding a block do have nVersion = 4, nVersion = 3 blocks become
   285+invalid, and all further blocks enforce the new rules.
   

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   luke-jr commented at 4:31 pm on October 23, 2015:

   What? I thought the plan was to have nVersion=3 blocks remain valid after this softfork? Otherwise we lose another bit forever…

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   petertodd commented at 4:42 pm on October 23, 2015:

   1. We don’t lose another bit.

   2. The existing IsSuperMajority() mechanism can’t do that safely, as it’d mean the soft-fork could be reversed after the fact. The nVersion bits mechanism needs to record state to do this safely.

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   luke-jr commented at 4:47 pm on October 23, 2015:

   For others who might read this…

   I was elaborately updated on the rationale on IRC: Essentially the plan is for versionbits to unburn all the lower bits at once by burning a higher one. While it might be nice not to even temporarily burn this one here, the code/testing overhead isn’t worth it.

5. luke-jr referenced this in commit 914702e39c on Oct 23, 2015
6. luke-jr merged this on Oct 23, 2015
7. luke-jr closed this on Oct 23, 2015

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8. btcdrak deleted the branch on Oct 23, 2015
9. luke-jr referenced this in commit 876b93151f on Jan 20, 2018
10. luke-jr referenced this in commit 700b5e7a5d on Jan 20, 2018
11. gmaxwell cross-referenced this on Apr 18, 2021 from issue BIP341: speedy trial activation parameters by ajtowns

Contributors
btcdrak petertodd luke-jr