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
|
Return-Path: <rusty@ozlabs.org>
Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org
[172.17.192.35])
by mail.linuxfoundation.org (Postfix) with ESMTPS id 581A31EA1
for <bitcoin-dev@lists.linuxfoundation.org>;
Wed, 30 Sep 2015 02:30:43 +0000 (UTC)
X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6
Received: from ozlabs.org (ozlabs.org [103.22.144.67])
by smtp1.linuxfoundation.org (Postfix) with ESMTPS id A27D8130
for <bitcoin-dev@lists.linuxfoundation.org>;
Wed, 30 Sep 2015 02:30:42 +0000 (UTC)
Received: by ozlabs.org (Postfix, from userid 1011)
id E2F7C140B0E; Wed, 30 Sep 2015 12:30:39 +1000 (AEST)
From: Rusty Russell <rusty@rustcorp.com.au>
To: "Bitcoin Dev" <bitcoin-dev@lists.linuxfoundation.org>
User-Agent: Notmuch/0.17 (http://notmuchmail.org) Emacs/24.4.1
(x86_64-pc-linux-gnu)
Date: Wed, 30 Sep 2015 12:00:23 +0930
Message-ID: <87zj04fxkw.fsf@rustcorp.com.au>
MIME-Version: 1.0
Content-Type: text/plain
X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_MED,
T_RP_MATCHES_RCVD autolearn=ham version=3.3.1
X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on
smtp1.linux-foundation.org
Cc: Pieter Wuille <pieter.wuille@gmail.com>
Subject: [bitcoin-dev] Versionbits BIP (009) minor revision proposal.
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: Wed, 30 Sep 2015 02:30:43 -0000
Hi all,
Pieter and Eric pointed out that the current BIP has miners
turning off the bit as soon as it's locked in (75% testnet / 95%
mainnet). It's better for them to keep setting the bit until activation
(2016 blocks later), so network adoption is visible.
I'm not proposing another suggestion, though I note it for future:
miners keep setting the bit for another 2016 blocks after activation,
and have a consensus rule that rejects blocks without the bit. That
would "force" upgrades on those last miners. I feel we should see how
this works first.
Cheers,
Rusty.
diff --git a/bip-0009.mediawiki b/bip-0009.mediawiki
index c17ca15..b160810 100644
--- a/bip-0009.mediawiki
+++ b/bip-0009.mediawiki
@@ -37,14 +37,15 @@ retarget period.
Software which supports the change should begin by setting B in all blocks
mined until it is resolved.
- if (BState == defined) {
+ if (BState != activated && BState != failed) {
SetBInBlock();
}
'''Success: Lock-in Threshold'''
If bit B is set in 1916 (1512 on testnet) or
more of the 2016 blocks within a retarget period, it is considered
-''locked-in''. Miners should stop setting bit B.
+''locked-in''. Miners should continue setting bit B, so uptake is
+visible.
if (NextBlockHeight % 2016 == 0) {
if (BState == defined && Previous2016BlocksCountB() >= 1916) {
@@ -57,7 +58,7 @@ more of the 2016 blocks within a retarget period, it is considered
The consensus rules related to ''locked-in'' soft fork will be enforced in
the second retarget period; ie. there is a one retarget period in
which the remaining 5% can upgrade. At the that activation block and
-after, the bit B may be reused for a different soft fork.
+after, miners should stop setting bit B, which may be reused for a different soft fork.
if (BState == locked-in && NextBlockHeight == BActiveHeight) {
BState = activated;
|
