1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
Received: from sog-mx-3.v43.ch3.sourceforge.com ([172.29.43.193]
helo=mx.sourceforge.net)
by sfs-ml-2.v29.ch3.sourceforge.com with esmtp (Exim 4.76)
(envelope-from <pete@petertodd.org>) id 1YxYN5-0000DG-2A
for bitcoin-development@lists.sourceforge.net;
Wed, 27 May 2015 10:15:35 +0000
Received-SPF: pass (sog-mx-3.v43.ch3.sourceforge.com: domain of petertodd.org
designates 62.13.149.81 as permitted sender)
client-ip=62.13.149.81; envelope-from=pete@petertodd.org;
helo=outmail149081.authsmtp.net;
Received: from outmail149081.authsmtp.net ([62.13.149.81])
by sog-mx-3.v43.ch3.sourceforge.com with esmtp (Exim 4.76)
id 1YxYN3-0002R8-4W for bitcoin-development@lists.sourceforge.net;
Wed, 27 May 2015 10:15:35 +0000
Received: from mail-c235.authsmtp.com (mail-c235.authsmtp.com [62.13.128.235])
by punt18.authsmtp.com (8.14.2/8.14.2/) with ESMTP id t4RAFOuc005616;
Wed, 27 May 2015 11:15:24 +0100 (BST)
Received: from savin.petertodd.org (75-119-251-161.dsl.teksavvy.com
[75.119.251.161]) (authenticated bits=128)
by mail.authsmtp.com (8.14.2/8.14.2/) with ESMTP id t4RAFGJX047330
(version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO);
Wed, 27 May 2015 11:15:19 +0100 (BST)
Date: Wed, 27 May 2015 06:15:16 -0400
From: Peter Todd <pete@petertodd.org>
To: Tier Nolan <tier.nolan@gmail.com>
Message-ID: <20150527101516.GB25814@savin.petertodd.org>
References: <CAPg+sBg5TqQ=zjyZ7dp-d1oBGp31Krnix3zyt9suP4-AGbxW=Q@mail.gmail.com>
<201505270346.17014.luke@dashjr.org>
<CABm2gDoriDaQ1AjRDFxCT9zCNPQakJd9xRxfWkOJBf4v22hndQ@mail.gmail.com>
<CAE-z3OVAKyppLVEWR=qNX-_p5yVAj_0Y7Kw76o4qaywf2DKtVw@mail.gmail.com>
MIME-Version: 1.0
Content-Type: multipart/signed; micalg=pgp-sha256;
protocol="application/pgp-signature"; boundary="JYK4vJDZwFMowpUq"
Content-Disposition: inline
In-Reply-To: <CAE-z3OVAKyppLVEWR=qNX-_p5yVAj_0Y7Kw76o4qaywf2DKtVw@mail.gmail.com>
User-Agent: Mutt/1.5.21 (2010-09-15)
X-Server-Quench: 474e907f-0459-11e5-b396-002590a15da7
X-AuthReport-Spam: If SPAM / abuse - report it at:
http://www.authsmtp.com/abuse
X-AuthRoute: OCd2Yg0TA1ZNQRgX IjsJECJaVQIpKltL GxAVKBZePFsRUQkR
aAdMdAUUFVQNAgsB AmMbWlVeUVh7WGo7 bA9PbARUfEhLXhtr
VklWR1pVCwQmRRhj d2hpKHFycwJFe34+ bENhWT5fW0AvfEZ6
FFNUEWgPeGZhPWUC AkNRcR5UcAFPdx8U a1UrBXRDAzANdhES
HhM4ODE3eDlSNilR RRkIIFQOdA41EyQn RhcEVT8uAVZNXz80 Nxs9I1p0
X-Authentic-SMTP: 61633532353630.1023:706
X-AuthFastPath: 0 (Was 255)
X-AuthSMTP-Origin: 75.119.251.161/587
X-AuthVirus-Status: No virus detected - but ensure you scan with your own
anti-virus system.
X-Spam-Score: -1.5 (-)
X-Spam-Report: Spam Filtering performed by mx.sourceforge.net.
See http://spamassassin.org/tag/ for more details.
-1.5 SPF_CHECK_PASS SPF reports sender host as permitted sender for
sender-domain
-0.0 SPF_PASS SPF: sender matches SPF record
X-Headers-End: 1YxYN3-0002R8-4W
Cc: Bitcoin Dev <bitcoin-development@lists.sourceforge.net>
Subject: Re: [Bitcoin-development] Version bits proposal
X-BeenThere: bitcoin-development@lists.sourceforge.net
X-Mailman-Version: 2.1.9
Precedence: list
List-Id: <bitcoin-development.lists.sourceforge.net>
List-Unsubscribe: <https://lists.sourceforge.net/lists/listinfo/bitcoin-development>,
<mailto:bitcoin-development-request@lists.sourceforge.net?subject=unsubscribe>
List-Archive: <http://sourceforge.net/mailarchive/forum.php?forum_name=bitcoin-development>
List-Post: <mailto:bitcoin-development@lists.sourceforge.net>
List-Help: <mailto:bitcoin-development-request@lists.sourceforge.net?subject=help>
List-Subscribe: <https://lists.sourceforge.net/lists/listinfo/bitcoin-development>,
<mailto:bitcoin-development-request@lists.sourceforge.net?subject=subscribe>
X-List-Received-Date: Wed, 27 May 2015 10:15:35 -0000
--JYK4vJDZwFMowpUq
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable
On Wed, May 27, 2015 at 10:35:03AM +0100, Tier Nolan wrote:
> I think it would be better to have the deadlines set as block counts. Th=
at
> eliminates the need to use the median time mechanism.
The median time mechanism is basically a way for hashing power to show
what time they think it is. Equally, the nVersion soft-fork mechanism is
a way for hashing power to show what features they want to support.
Block counts are inconvenient for planning, as there's no guarantee
they'll actually happen in any particular time frame, forward and back.
There's no particular incentive problems here - the median time clearly
shows support by a majority of hashing power - so I don't see any reason
to make planning more difficult.
> The deadline could be matched to a "start-line". The definition would th=
en
> be something like
>=20
> BIP 105
> Start block: 325000
> End block: 350000
> Activation: 750 of 1000
> Implication: 950 of 1000
> Bit: 9
>=20
> This would allow creation of a simple table of known BIPs. It also keeps
> multiple users of the bit as strictly separate.
If you assume no large reorganizations, your table of known BIPs can
just as easily be a list of block heights even if the median time
mechanism is used.
If you do assume there may be large reorganizations you can't have a
"simple table"
--=20
'peter'[:-1]@petertodd.org
000000000000000001643f7706f3dcbc3a386e4c1bfba852ff628d8024f875b6
--JYK4vJDZwFMowpUq
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: Digital signature
-----BEGIN PGP SIGNATURE-----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==
=T3wN
-----END PGP SIGNATURE-----
--JYK4vJDZwFMowpUq--
|
