From: Tier Nolan <tier.nolan@gmail•com>
To: Btc Drak <btcdrak@gmail•com>
Cc: Bitcoin Dev <bitcoin-dev@lists•linuxfoundation.org>
Subject: Re: [bitcoin-dev] CLTV/CSV/etc. deployment considerations due to XT/Not-BitcoinXT miners
Date: Wed, 19 Aug 2015 19:17:15 +0100 [thread overview]
Message-ID: <CAE-z3OV=sEd18JY1raVf5j9XTnEZ+vovkuQw57V9UoSXh6Affw@mail.gmail.com> (raw)
In-Reply-To: <CADJgMzsvAfJnW1DDD6t3qkBcQRLb4HMqG27k51LhXJqxC6-z4g@mail.gmail.com>
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On Wed, Aug 19, 2015 at 6:25 PM, Btc Drak <btcdrak@gmail•com> wrote:
> In our case for Bitcoin Core, option 2 we use nVersion=8, apply a
> bitmask of 0xdffffff8 thus:
>
> if ((block.nVersion & ~0x20000007) >= 4 &&
> CBlockIndex::IsSuperMajority(...)) { //...}
>
> With nVersion=8, but using comparison >=4 allows us to recover the
> bit later, assuming we want it (otherwise we use version >=8).
>
That is the 75% "activation" rule portion? The 95% rule has to apply to
all blocks.
The supermajority applies to unmasked blocks?
I think you want it so that a sequence of blocks with version 8 can be
followed by version 4 blocks?
If 950 of the last 1000 blocks have bit 0x08 set, then reject any block
with a version less than 4.
This means transitioning to the version bits BIP just requires dropping the
version back to 4 and adding a rule enforcing the BIPs for version 4 and
higher blocks.
This would be part of the version bits BIP enforcement.
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next prev parent reply other threads:[~2015-08-19 18:17 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-19 5:50 Peter Todd
2015-08-19 6:10 ` Mark Friedenbach
2015-08-19 9:34 ` Jorge Timón
2015-08-19 10:20 ` Btc Drak
2015-08-19 10:31 ` Jorge Timón
2015-08-19 13:15 ` Btc Drak
2015-08-19 13:24 ` Tier Nolan
2015-08-19 17:25 ` Btc Drak
2015-08-19 18:17 ` Tier Nolan [this message]
2015-08-19 12:36 ` Matt Corallo
2015-08-19 13:22 ` Tier Nolan
2015-08-19 14:01 ` Jeff Garzik
2015-08-19 16:32 ` Mark Friedenbach
2015-08-19 21:03 ` Peter Todd
2015-08-20 17:32 ` jl2012
2015-08-20 17:42 ` Mark Friedenbach
2015-08-27 22:11 ` Btc Drak
-- strict thread matches above, loose matches on Subject: below --
2015-08-18 1:22 [bitcoin-dev] BIP: Using Median time-past as endpoint for locktime calculations Thomas Kerin
2015-08-19 1:04 ` Peter Todd
2015-08-19 1:08 ` Mark Friedenbach
2015-08-21 11:13 ` Thomas Kerin
2015-08-22 0:57 ` Peter Todd
2015-08-27 22:08 ` Btc Drak
2015-08-27 23:19 ` Peter Todd
2015-08-28 15:27 ` jl2012
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