From f5c728ff82ddeae65fdc7d60983586696b829bf5 Mon Sep 17 00:00:00 2001 From: JamesC Date: Mon, 16 Sep 2019 21:59:54 +0200 Subject: Removed reference to 0xc1 leaf version. No longer necessary with 32B pubkeys. --- bip-tapscript.mediawiki | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'bip-tapscript.mediawiki') diff --git a/bip-tapscript.mediawiki b/bip-tapscript.mediawiki index af46afd..603990e 100644 --- a/bip-tapscript.mediawiki +++ b/bip-tapscript.mediawiki @@ -47,7 +47,7 @@ The rules below only apply when validating a transaction input for which all of * The transaction output is a '''segregated witness spend''' (i.e., either the scriptPubKey or BIP16 redeemScript is a witness program as defined in BIP141). * It is a '''taproot spend''' as defined in bip-taproot (i.e., the witness version is 1, the witness program is 32 bytes). * It is a '''script path spend''' as defined in bip-taproot (i.e., after removing the optional annex from the witness stack, two or more stack elements remain). -* The leaf version is ''0xc0'' (i.e. the first byte of the last witness element after removing the optional annex is ''0xc0'' or ''0xc1'')'''How is the ''0xc0'' constant chosen?''' Following the guidelines in bip-taproot, by choosing a value having the two top bits set, tapscript spends are identifiable even without access to the UTXO being spent., marking it as a '''tapscript spend'''. +* The leaf version is ''0xc0'' (i.e. the first byte of the last witness element after removing the optional annex is ''0xc0'')'''How is the ''0xc0'' constant chosen?''' Following the guidelines in bip-taproot, by choosing a value having the two top bits set, tapscript spends are identifiable even without access to the UTXO being spent., marking it as a '''tapscript spend'''. Validation of such inputs must be equivalent to performing the following steps in the specified order. # If the input is invalid due to BIP16, BIP141, or bip-taproot, fail. @@ -142,4 +142,3 @@ This rule limits worst-case validation costs in tapscript similar to the ''sigop ==Acknowledgements== This document is the result of many discussions and contains contributions by Jonas Nick, Anthony Towns, and others. - -- cgit v1.2.3