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
|
Received: from sog-mx-2.v43.ch3.sourceforge.com ([172.29.43.192]
helo=mx.sourceforge.net)
by sfs-ml-4.v29.ch3.sourceforge.com with esmtp (Exim 4.76)
(envelope-from <jgarzik@exmulti.com>) id 1SXayZ-0001Da-Lt
for bitcoin-development@lists.sourceforge.net;
Thu, 24 May 2012 16:33:23 +0000
X-ACL-Warn:
Received: from mail-lb0-f175.google.com ([209.85.217.175])
by sog-mx-2.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128)
(Exim 4.76) id 1SXayV-0002Zi-K0
for bitcoin-development@lists.sourceforge.net;
Thu, 24 May 2012 16:33:23 +0000
Received: by lbol5 with SMTP id l5so8625488lbo.34
for <bitcoin-development@lists.sourceforge.net>;
Thu, 24 May 2012 09:33:13 -0700 (PDT)
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
d=google.com; s=20120113;
h=mime-version:x-originating-ip:date:message-id:subject:from:to
:content-type:x-gm-message-state;
bh=yQY92Ggm02d/tcMilNjBZ0kek6ASJOEKFdrzhlIUaXk=;
b=LpAr1OIe6FeGY/6NAntJL0tM/8f3IBAc/gnt/ORZ1szTDP3eYvEIQhXJzRN1fYYELi
tI7tGI7/8odAc6E4ca0+blVopLNxmZGv+zRsxhOaFUyyHVeMhmGVUZ++da+7SXqbeRZU
hbFtFzo850nRC9VF+CVM4PnlI0MTipvGA+ihcsull92JuWhl5R3bsjQN+UwrKSCnhpxH
BoF4Ws7jmRodJWsUonsX8Qc/r3VMqYPBglCgc1YASgpDbsOtSFk/AoDEjJmQMBlUy38b
WmVZDjZfO3mX2yEghyyqi6Z3dnkADHrQLq91RcBK6kEXWSJw0nRBbzVOqTZGKIuPvZxV
4Kvg==
MIME-Version: 1.0
Received: by 10.112.46.101 with SMTP id u5mr50839lbm.21.1337877192953; Thu, 24
May 2012 09:33:12 -0700 (PDT)
Received: by 10.114.0.103 with HTTP; Thu, 24 May 2012 09:33:12 -0700 (PDT)
X-Originating-IP: [99.43.178.25]
Date: Thu, 24 May 2012 12:33:12 -0400
Message-ID: <CA+8xBpdBe4yR6xkCODL6JQ41Gyx9eWcGGGvcQVt7DCmaEnAhbg@mail.gmail.com>
From: Jeff Garzik <jgarzik@exmulti.com>
To: Bitcoin Development <bitcoin-development@lists.sourceforge.net>
Content-Type: text/plain; charset=ISO-8859-1
X-Gm-Message-State: ALoCoQmLEvymyQygIwafuqy+Scu6lRtQEXC5VgC3HlwQPohlHHqQTiNtiwMTYvypoQBUXr0bnwQT
X-Spam-Score: 0.0 (/)
X-Spam-Report: Spam Filtering performed by mx.sourceforge.net.
See http://spamassassin.org/tag/ for more details.
0.0 AWL AWL: From: address is in the auto white-list
X-Headers-End: 1SXayV-0002Zi-K0
Subject: [Bitcoin-development] Punishing empty blocks?
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: Thu, 24 May 2012 16:33:23 -0000
There appears to be some non-trivial mining power devoted to mining
empty blocks. Even with satoshi's key observation -- hash a fixed
80-byte header, not the entire block -- some miners still find it
easier to mine empty blocks, rather than watch the network for new
transactions.
Therefore I was wondering what people thought about a client
implementation change:
- Do not store or relay empty blocks, if time since last block < X
(where X = 60 minutes, perhaps)
or even stronger,
- Ensure latest block includes at least X percent of mempool
unconfirmed TXs
The former is easier to implement, though there is the danger that
no-TX miners simply include a statically generated transaction or two.
The latter might be considered problematic, as it might refuse to
relay quickly found blocks.
Comments? It wouldn't be a problem if these no-TX blocks were not
already getting frequent (1 in 20).
--
Jeff Garzik
exMULTI, Inc.
jgarzik@exmulti.com
|