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author | Pieter Wuille <pieter.wuille@gmail.com> | 2019-10-09 12:12:55 -0700 |
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committer | Pieter Wuille <pieter.wuille@gmail.com> | 2020-01-19 14:47:33 -0800 |
commit | 276d9d338b21e48dcb40c4e4c0a5d9f8ff5a20a1 (patch) | |
tree | ab6790621d21d871430f50f64ecbee7f112e66bb /bip-tapscript.mediawiki | |
parent | c93e2985185fb730f098d3d1face57c58a7c18e7 (diff) | |
download | bips-276d9d338b21e48dcb40c4e4c0a5d9f8ff5a20a1.tar.xz |
Small fix: 0xc1 is possible as first control block byte
Diffstat (limited to 'bip-tapscript.mediawiki')
-rw-r--r-- | bip-tapscript.mediawiki | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/bip-tapscript.mediawiki b/bip-tapscript.mediawiki index a31774f..a325573 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., the scriptPubKey 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, and it is not P2SH wrapped). * 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'')<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'' 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'''. 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. |