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author฿tcDrak <btcdrak@users.noreply.github.com>2015-08-24 19:06:13 +0100
committerBtcDrak <btcdrak@gmail.com>2015-09-04 00:39:01 +0100
commitd4c9a236ecb947866c61aefb868b284498489c2b (patch)
treeb3ff10bc41a524584c33b9e0e59492402e2d0469
parentaa4056a44224f38472f5a0eecf13797ef9e633cc (diff)
downloadbips-d4c9a236ecb947866c61aefb868b284498489c2b.tar.xz
Update with BIP assignments
Update deployment methodology
-rw-r--r--bip-0113.mediawiki (renamed from bip-median-past-timelock.mediawiki)46
1 files changed, 35 insertions, 11 deletions
diff --git a/bip-median-past-timelock.mediawiki b/bip-0113.mediawiki
index 3d3e7db..b7313e3 100644
--- a/bip-median-past-timelock.mediawiki
+++ b/bip-0113.mediawiki
@@ -1,5 +1,5 @@
<pre>
- BIP: XX
+ BIP: 113
Title: Median time-past as endpoint for lock-time calculations
Author: Thomas Kerin <me@thomaskerin.io>
Mark Friedenbach <mark@friedenbach.org>
@@ -35,7 +35,7 @@ miners to claim more transaction fees by lying about the timestamps of
their block.
This proposal seeks to ensure reliable behaviour in locktime calculations as
-required by BIP65, BIP68, and BIPXX (OP_CHECKSEQUENCEVERIFY).
+required by BIP65 (CHECKLOCKTIMEVERIFY), BIP68, and BIP112 (CHECKSEQUENCEVERIFY).
==Specification==
@@ -72,16 +72,33 @@ https://github.com/maaku/bitcoin/tree/medianpasttimelock
==Deployment==
-We reuse the double-threshold switchover mechanism from BIPs 34 and 66, with the
-same thresholds, but for block.nVersion = 4. The new rules are in effect for
-every block (at height H) with nVersion = 4 and at least 750 out of 1000 blocks
-preceding it (with heights H-1000...H-1) also have nVersion = 4. Furthermore,
-when 950 out of the 1000 blocks preceding a block do have nVersion = 4,
-nVersion = 3 blocks become invalid, and all further blocks enforce the new rules.
+We reuse the double-threshold switchover mechanism from BIPs 34 and
+66, with the same thresholds, but for nVersion = 8. The new rules are
+in effect for every block (at height H) with nVersion = 8 and at least
+750 out of 1000 blocks preceding it (with heights H-1000..H-1) also
+have nVersion = 8. Furthermore, when 950 out of the 1000 blocks
+preceding a block do have nVersion = 8, nVersion = 3 blocks become
+invalid, and all further blocks enforce the new rules.
+
+When assessing the block version as mask of ~0x20000007 must be applied
+to work around the complications caused by
+[http://lists.linuxfoundation.org/pipermail/bitcoin-dev/2015-August/010396.html BIP101's premature use]
+of the [https://gist.github.com/sipa/bf69659f43e763540550 undecided version bits proposal].
+
+By applying ~0x20000007 with nVersion = 8, the thresholds should be tested
+comparing block nVersion >= 4 as this will save a bit for future use.
It is recommended that this soft-fork deployment trigger include other related
-proposals for improving Bitcoin's lock-time capabilities, such as BIP 65, BIP68
-and CHECKSEQUENCEVERIFY.
+proposals for improving Bitcoin's lock-time capabilities, including:
+
+[https://github.com/bitcoin/bips/blob/master/bip-0065.mediawiki BIP 65]:
+CHECKLOCKTIMEVERIFY,
+
+[https://github.com/bitcoin/bips/blob/master/bip-0068.mediawiki BIP 68]:
+Consensus-enforced transaction replacement signalled via sequence numbers,
+
+and [https://github.com/bitcoin/bips/blob/master/bip-0112.mediawiki BIP 112]:
+CHECKSEQUENCEVERIFY.
==Acknowledgements==
@@ -89,6 +106,9 @@ and CHECKSEQUENCEVERIFY.
Mark Friedenbach for designing and authoring the reference
implementation of this BIP.
+Thanks go to Gregory Maxwell who came up with the original idea,
+in #bitcoin-wizards on 2013-07-16.
+
Thomas Kerin authored this BIP document.
@@ -105,7 +125,11 @@ concerns with existing protocols.
[https://github.com/bitcoin/bips/blob/master/bip-0068.mediawiki BIP68: Consensus-enforced transaction replacement signaled via sequence numbers]
-[https://github.com/bitcoin/bips/blob/master/bip-00.mediawiki BIPXX: CHECKSEQUENCEVERIFY]
+[https://github.com/bitcoin/bips/blob/master/bip-0112.mediawiki BIP112: CHECKSEQUENCEVERIFY]
+
+[http://lists.linuxfoundation.org/pipermail/bitcoin-dev/2015-August/010396.html Softfork deployment considerations]
+
+[https://gist.github.com/sipa/bf69659f43e763540550 Version bits]
==Copyright==