mirrors/bitcoin-bips
1
0
Fork 0
mirror of https://github.com/bitcoin/bips.git synced 2025-01-18 21:35:13 +01:00
Code Issues Projects Releases Wiki Activity

Merge pull request #399 from jl2012/patch-22

Browse Source 
BIP141 script failure clarifications
This commit is contained in:
Luke-Jr 2016-07-16 00:00:31 +00:00 committed by GitHub
commit f42ca5953b
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
bip-0141.mediawiki
View File

@ -98,9 +98,9 @@ If the version byte is 0, and the witness program is 32 bytes:
* The <code>witnessScript</code> is deserialized, and executed after normal script evaluation with the remaining witness stack (≤ 520 bytes for each stack item).
* The script must not fail, and result in exactly a single TRUE on the stack.
If the version byte is 0, but the witness program is neither 20 nor 32 bytes, the script must fail.
If the version byte is 0, but the witness program is neither 20 nor 32 bytes, the script must fail.<ref>For example, a scriptPubKey with OP_0 followed by a 40-byte non-zero data push will fail due to incorrect program size. However, a scriptPubKey with OP_0 followed by a 41-byte non-zero data push will pass, since it is not considered to be a witness program</ref>
If the version byte is 1 to 16, no further interpretation of the witness program or witness happens, and there is no size restriction for the witness. These versions are reserved for future extensions.
If the version byte is 1 to 16, no further interpretation of the witness program or witness stack happens, and there is no size restriction for the witness stack. These versions are reserved for future extensions.<ref>For backward compatibility, for any version byte from 0 to 16, the script must fail if the witness program has a <code>CastToBool</code> value of zero. However, having a hash like this is a successful preimage attack against the hash function, and the risk is negligible.</ref>
=== Other consensus critical limits ===