diff options
Diffstat (limited to 'bip-0173.mediawiki')
| -rw-r--r-- | bip-0173.mediawiki | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/bip-0173.mediawiki b/bip-0173.mediawiki index ad6c58b..7087fff 100644 --- a/bip-0173.mediawiki +++ b/bip-0173.mediawiki @@ -11,6 +11,7 @@ Created: 2017-03-20 License: BSD-2-Clause Replaces: 142 + Superseded-By: 350 </pre> ==Introduction== @@ -208,8 +209,8 @@ be of the same length as the mainnet counterpart (to simplify implementations' assumptions about lengths), but still be visually distinct.</ref> for testnet. * The data-part values: -** 1 byte: the witness version -** A conversion of the the 2-to-40-byte witness program (as defined by [https://github.com/bitcoin/bips/blob/master/bip-0141.mediawiki BIP141]) to base32: +** 1 character (representing 5 bits of data): the witness version +** A conversion of the 2-to-40-byte witness program (as defined by [https://github.com/bitcoin/bips/blob/master/bip-0141.mediawiki BIP141]) to base32: *** Start with the bits of the witness program, most significant bit per byte first. *** Re-arrange those bits into groups of 5, and pad with zeroes at the end if needed. *** Translate those bits to characters using the table above. @@ -403,3 +404,12 @@ separator). This document is inspired by the [https://rusty.ozlabs.org/?p=578 address proposal] by Rusty Russell, the [https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2014-February/004402.html base32] proposal by Mark Friedenbach, and had input from Luke Dashjr, Johnson Lau, Eric Lombrozo, Peter Todd, and various other reviewers. + +==Disclosures (added 2024)== + +Due to an oversight in the design of bech32, this checksum scheme is not always +robust against +[[https://gist.github.com/sipa/a9845b37c1b298a7301c33a04090b2eb|the insertion +and deletion of fewer than 5 consecutive characters]]. Due to this weakness, +[[bip-0350.mediawiki|BIP-350]] proposes using the scheme described in this BIP +only for Native Segwit v0 outputs. |