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Merge pull request #228 from btcdrak/bip65deploybits

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Add note about not consuming nVersion bits
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Luke-Jr 2015-10-27 20:53:05 +00:00
commit b1b0cd6483
1 changed files with 6 additions and 2 deletions
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@ -273,14 +273,18 @@ https://github.com/petertodd/bitcoin/commit/ab0f54f38e08ee1e50ff72f801680ee84d0f
==Deployment==
We reuse the double-threshold switchover mechanism from BIPs 34 and
66, with the same thresholds, but for nVersion = 4. The new rules are
We reuse the double-threshold IsSuperMajority() switchover mechanism used in
BIP 66 with the same thresholds, but for nVersion = 4. The new rules are
in effect for every block (at height H) with nVersion = 4 and at least
750 out of 1000 blocks preceding it (with heights H-1000..H-1) also
have nVersion = 4. Furthermore, when 950 out of the 1000 blocks
preceding a block do have nVersion = 4, nVersion = 3 blocks become
invalid, and all further blocks enforce the new rules.
It should be noted that BIP9 involves permanently setting a high-order bit to
1 which results in nVersion >= all prior IsSuperMajority() soft-forks and thus
no bits in nVersion are permanently lost.
==Credits==