diff options
| author | Pieter Wuille <pieter.wuille@gmail.com> | 2019-09-23 22:48:12 -0700 |
|---|---|---|
| committer | Pieter Wuille <pieter.wuille@gmail.com> | 2020-01-19 14:47:33 -0800 |
| commit | d9a30c954f24cd77f7695d31755ab18ab32deaa7 (patch) | |
| tree | a17644eda37011d2ad9dbf39662a8dd27a9ca840 /bip-tapscript.mediawiki | |
| parent | 78bb31c3bf1aa9459643653e07715d597df4a24f (diff) | |
| download | bips-d9a30c954f24cd77f7695d31755ab18ab32deaa7.tar.xz | |
Extend codeseparator_position from 16 to 32 bits
Diffstat (limited to 'bip-tapscript.mediawiki')
| -rw-r--r-- | bip-tapscript.mediawiki | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/bip-tapscript.mediawiki b/bip-tapscript.mediawiki index 1d3e6fa..b88e9c9 100644 --- a/bip-tapscript.mediawiki +++ b/bip-tapscript.mediawiki @@ -108,9 +108,9 @@ The one-byte <code>spend_type</code> has a different value, specifically at bit As additional pieces of data, added at the end of the input to the ''hash<sub>TapSighash</sub>'' function: * <code>tapleaf_hash</code> (32): the tapleaf hash as defined in bip-taproot * <code>key_version</code> (1): a constant value <code>0x00</code> representing the current version of public keys in the tapscript signature opcode execution. -* <code>codeseparator_position</code> (2): the opcode position of the last executed <code>OP_CODESEPARATOR</code> before the currently executed signature opcode, with the value in little endian (or <code>0xffff</code> if none executed). The first opcode in a script has a position of 0. A multi-byte push opcode is counted as one opcode, regardless of the size of data being pushed. +* <code>codeseparator_position</code> (4): the opcode position of the last executed <code>OP_CODESEPARATOR</code> before the currently executed signature opcode, with the value in little endian (or <code>0xffffffff</code> if none executed). The first opcode in a script has a position of 0. A multi-byte push opcode is counted as one opcode, regardless of the size of data being pushed. -The total number of bytes hashed is at most ''244''<ref>'''What is the number of bytes hashed for the signature hash?''' The total size of the input to ''hash<sub>TapSighash</sub>'' (excluding the initial 64-byte hash tag) can be computed using the following formula: ''211 - is_anyonecanpay * 50 - is_none * 32 + has_annex * 32''.</ref>. +The total number of bytes hashed is at most ''246''<ref>'''What is the number of bytes hashed for the signature hash?''' The total size of the input to ''hash<sub>TapSighash</sub>'' (excluding the initial 64-byte hash tag) can be computed using the following formula: ''213 - is_anyonecanpay * 50 - is_none * 32 + has_annex * 32''.</ref>. In summary, the semantics of the BIP143 sighash types remain unchanged, except the following: # The exceptions mentioned in bip-taproot. |