From 8e22af1d0a5de646b8f6cf4e9a78aa5792fcf7a5 Mon Sep 17 00:00:00 2001
From: Johnson Lau <jl2012@users.noreply.github.com>
Date: Thu, 14 Jan 2016 13:15:10 +0800
Subject: Title change and links update

---
 bip-0143.mediawiki | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to 'bip-0143.mediawiki')

diff --git a/bip-0143.mediawiki b/bip-0143.mediawiki
index 4aca2db..3d7e856 100644
--- a/bip-0143.mediawiki
+++ b/bip-0143.mediawiki
@@ -1,6 +1,6 @@
 <pre>
   BIP: 143
-  Title: Transaction signature verification for version 0 and version 1 witness program
+  Title: Transaction Signature Verification for Version 0 Witness Program
   Author: Johnson Lau <jl2012@xbt.hk>
           Pieter Wuille <pieter.wuille@gmail.com>
   Status: Draft
@@ -9,7 +9,7 @@
 </pre>
 
 == Abstract ==
-This proposal defines a new transaction digest algorithm for signature verification in version 0 and version 1 witness program, in order to minimize redundant data hashing in verification, and to cover the input value by the signature.
+This proposal defines a new transaction digest algorithm for signature verification in version 0 witness program, in order to minimize redundant data hashing in verification, and to cover the input value by the signature.
 
 == Motivation ==
 There are 4 ECDSA signature verification codes in the original Bitcoin script system: CHECKSIG, CHECKSIGVERIFY, CHECKMULTISIG, CHECKMULTISIGVERIFY (“sigops”). According to the sighash type (ALL, NONE, SINGLE, ANYONECANPAY), a transaction digest is generated with a double SHA256 of a serialized subset of the transaction, and the signature is verified against this digest with a given public key. The detailed procedure is described in a Bitcoin Wiki article. <ref name=wiki>[https://en.bitcoin.it/wiki/OP_CHECKSIG]</ref>
@@ -22,7 +22,7 @@ Unfortunately, there are at least 2 weaknesses in the original transaction diges
 Deploying the aforementioned fixes in the original script system is not a simple task. That would be either a hardfork, or a softfork for new sigops without the ability to remove or insert stack items. However, the introduction of segregated witness softfork offers an opportunity to define a different set of script semantics without disrupting the original system, as the unupgraded nodes would always consider such a transaction output is spendable by arbitrary signature or no signature at all. <ref>[https://github.com/bitcoin/bips/blob/master/bip-0141.mediawiki BIP141: Segregated Witness (Consensus layer)]</ref>
 
 == Specification ==
-A new transaction digest algorithm is defined, but only applicable to sigops in version 0 and version 1 witness program:
+A new transaction digest algorithm is defined, but only applicable to sigops in version 0 witness program:
   Double SHA256 of the serialization of:
      1. nVersion of the transaction
      2. hashPrevouts
@@ -122,7 +122,7 @@ As a soft fork, older software will continue to operate without modification. No
 
 == Reference Implementation ==
 
-https://github.com/sipa/bitcoin/commits/segwit2
+https://github.com/sipa/bitcoin/commits/segwit3
 
 == References ==
 
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