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Removed reference to 0xc1 leaf version.

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No longer necessary with 32B pubkeys.
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JamesC 2019-09-16 21:59:54 +02:00 committed by Pieter Wuille
parent b78b6de4fd
commit f5c728ff82
1 changed files with 1 additions and 2 deletions
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@ -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'')<ref>'''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.</ref>, 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'')<ref>'''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.</ref>, 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.