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
|
Return-Path: <odinn.cyberguerrilla@riseup.net>
Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org
[172.17.192.35])
by mail.linuxfoundation.org (Postfix) with ESMTPS id 1BD6AAC2
for <bitcoin-dev@lists.linuxfoundation.org>;
Sat, 4 Jul 2015 03:32:49 +0000 (UTC)
X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6
Received: from mx1.riseup.net (mx1.riseup.net [198.252.153.129])
by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 62792118
for <bitcoin-dev@lists.linuxfoundation.org>;
Sat, 4 Jul 2015 03:32:48 +0000 (UTC)
Received: from berryeater.riseup.net (berryeater-pn.riseup.net [10.0.1.120])
(using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits))
(Client CN "*.riseup.net",
Issuer "COMODO RSA Domain Validation Secure Server CA" (verified OK))
by mx1.riseup.net (Postfix) with ESMTPS id 0F489403AA
for <bitcoin-dev@lists.linuxfoundation.org>;
Sat, 4 Jul 2015 03:32:48 +0000 (UTC)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=riseup.net; s=squak;
t=1435980768; bh=aFWQ3bsU1474ogJTgU3Kr4gcCSxR/QNnQtrq8lqZZCE=;
h=Date:From:To:Subject:References:In-Reply-To:From;
b=MLnneV62KrrAxQ3+zhZgrRgiKACfypwVWnYaZqSPeQheJlYXXcKsYreJja9VBa8M1
Bkn5rl9wGlp8ehf9WlnKu3BoJZ/iP5wRlkIfIx1O1QMeDTkBQ+fBGKL0L+SYfLdcRI
eyg2AgZfRYdoXirfMavFQxZgQEEeUawbjo4c5yFU=
Received: from [127.0.0.1] (localhost [127.0.0.1])
(Authenticated sender: odinn.cyberguerrilla)
with ESMTPSA id CE8504000B
Message-ID: <559753DF.6000606@riseup.net>
Date: Fri, 03 Jul 2015 20:32:47 -0700
From: odinn <odinn.cyberguerrilla@riseup.net>
User-Agent: Mozilla/5.0 (X11; Linux x86_64;
rv:31.0) Gecko/20100101 Thunderbird/31.7.0
MIME-Version: 1.0
To: bitcoin-dev@lists.linuxfoundation.org
References: <COL402-EAS128602FDFB9DA83AC6C1BD2CD950@phx.gbl> <CAAS2fgQR15_1JVbtSD2yS9o5cpY-rNLsxpzuaeW2sexbQMuwQg@mail.gmail.com>
<20150704033016.GA14836@savin.petertodd.org>
In-Reply-To: <20150704033016.GA14836@savin.petertodd.org>
Content-Type: text/plain; charset=windows-1252
Content-Transfer-Encoding: 7bit
X-Virus-Scanned: clamav-milter 0.98.7 at mx1
X-Virus-Status: Clean
X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,DKIM_SIGNED,
DKIM_VALID, DKIM_VALID_AU, RCVD_IN_DNSWL_NONE, RP_MATCHES_RCVD,
UNPARSEABLE_RELAY autolearn=ham version=3.3.1
X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on
smtp1.linux-foundation.org
Subject: Re: [bitcoin-dev] Fork of invalid blocks due to BIP66 violations
X-BeenThere: bitcoin-dev@lists.linuxfoundation.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: Bitcoin Development Discussion <bitcoin-dev.lists.linuxfoundation.org>
List-Unsubscribe: <https://lists.linuxfoundation.org/mailman/options/bitcoin-dev>,
<mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=unsubscribe>
List-Archive: <http://lists.linuxfoundation.org/pipermail/bitcoin-dev/>
List-Post: <mailto:bitcoin-dev@lists.linuxfoundation.org>
List-Help: <mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=help>
List-Subscribe: <https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev>,
<mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=subscribe>
X-List-Received-Date: Sat, 04 Jul 2015 03:32:49 -0000
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
"The Wall Street of Bitcoin"
On 07/03/2015 08:30 PM, Peter Todd wrote:
> On Sat, Jul 04, 2015 at 03:17:17AM +0000, Gregory Maxwell wrote:
>> On Sat, Jul 4, 2015 at 3:11 AM, Raystonn <raystonn@hotmail.com>
>> wrote:
>>> We need some analysis on why this has happened. It appears the
>>> larger hashrate is violating BIP66. Thus it appears the
>>> network is rejecting this BIP, though potentially accidentally.
>>> If this is an accident, how is such a large portion of hashrate
>>> forking, and what can we do to avoid this in the future?
>>
>> A near majority of the hashrate on the network appears to be SPV
>> mining.
>
> As for what "SPV mining" is:
>
> While blocks are propagating throughout the network, frequently
> it's possible for miners to get the header of the block before they
> get and fully validate the block itself. This is just a few seconds
> to tens of seconds, but that's a big deal for profitability. So
> miners have been running custom patches that mine on top of the
> longest chain they know about, even if they haven't actually
> verified the blocks in it due to propagation delays.
>
> Unfortunately the Bitcoin protocol lets you do that, and the extra
> % of revenue makes a big difference when you take into account the
> low profit margins of mining these days. BIP66 happened to trigger
> this issue this time, but actually *any* miner creating an invalid
> block for *any* reason would have done so with the software miners
> are running right now.
>
>
>
> _______________________________________________ bitcoin-dev mailing
> list bitcoin-dev@lists.linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>
- --
http://abis.io ~
"a protocol concept to enable decentralization
and expansion of a giving economy, and a new social good"
https://keybase.io/odinn
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
iQEcBAEBAgAGBQJVl1PeAAoJEGxwq/inSG8C2LAIAK9FbCODbTu2t2yktusv37Sd
zf5/ApqciZ01X4oiQHHKXIgzhYgNenv2dnRsBsrGtn53L1AopXOiSIcz8ECCYsjp
lwiKitebU7VukDlCu07ZQpff62Hm34lsqo2oXZHSC/lKYXD5llixgCmNrs2CTYrF
bWxCr2pngr+azDFX9hUSr6c48MO8Id8hdiWIcYwofNOcUACloqgJ/SaZZqT5OSXj
gk3Iq0ltTQdc71z7g8G1cqHfL/Nu47X0XnwVt8UAOn0b8bo3Hbz3QegPXoj1tik2
j8lJUqm3lwKdIky2i50OWxL/agaXou3jJy19jhziW5sRh3tkZfC4BbI+wazfRyk=
=dW9O
-----END PGP SIGNATURE-----
|
