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| author | Luke-Jr <luke_github1@dashjr.org> | 2016-07-16 00:00:31 +0000 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2016-07-16 00:00:31 +0000 |
| commit | f42ca5953bcdf71b05da62c240356716f7b0cc36 (patch) | |
| tree | 051f32f92b656218648600fd5c908bd4fe03d8b6 /bip-0141.mediawiki | |
| parent | f275a5549bbbc46ef7475e6a1993a7c1de209af4 (diff) | |
| parent | 7304edc475a93a4add0320907b2fe61c4f331720 (diff) | |
| download | bips-f42ca5953bcdf71b05da62c240356716f7b0cc36.tar.xz | |
Merge pull request #399 from jl2012/patch-22
BIP141 script failure clarifications
Diffstat (limited to 'bip-0141.mediawiki')
| -rw-r--r-- | bip-0141.mediawiki | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/bip-0141.mediawiki b/bip-0141.mediawiki index 27a59f9..8fdc795 100644 --- a/bip-0141.mediawiki +++ b/bip-0141.mediawiki @@ -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 === |