diff options
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 === |