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23  From: Rusty Russell <rusty@rustcorp.com.au>
24  To: Pieter Wuille <bitcoin-dev@wuille.net>,
25   Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>,
26   Bitcoin dev list <bitcoin-dev@lists.linuxfoundation.org>
27  In-Reply-To: <yRPu_9VJPU75ohEyqSNqVVC5J33GCDcl7ZlXFc94xJmYral9o3xA3SuoWfq2p_gVaZagKraZ7Du569y3L3f4s6k7xF3-SDx7M2Sv3VnCO-4=@wuille.net>
28  References: <jfRUzc8uB5fpIQy-a_TfTwjAD4FMtf2eInfHdgZRoLwc0NdTv7srnRLtmwFHPLInJfglSzOXXe0SVR3cgHejGPi0Kwl81UV_wkwVJcQi1rA=@wuille.net>
29   <yRPu_9VJPU75ohEyqSNqVVC5J33GCDcl7ZlXFc94xJmYral9o3xA3SuoWfq2p_gVaZagKraZ7Du569y3L3f4s6k7xF3-SDx7M2Sv3VnCO-4=@wuille.net>
30  Date: Sat, 09 Jan 2021 15:30:24 +1030
31  Message-ID: <87lfd27lhz.fsf@rustcorp.com.au>
32  MIME-Version: 1.0
33  Content-Type: text/plain
34  Subject: Re: [bitcoin-dev] Bech32m BIP: new checksum,
35  	and usage for segwit address
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48  
49  Perhaps title 'Bech32m address format for native v0-16 segregated
50  witness outputs' should probably be v1-16?
51  
52  This is a thorough and clear write up; a superb read.
53  
54  Side note: I am deeply impressed with your mathematical jujitsu that no
55  bech32 string is also a valid bech32m string *even with three errors*.
56  
57  This sways me even more that this approach is correct.
58  
59  Untested-Ack.
60  
61  Thanks,
62  Rusty.
63  
64  Pieter Wuille via bitcoin-dev <bitcoin-dev@lists.linuxfoundation.org>
65  writes:
66  
67  > On Monday, January 4, 2021 4:14 PM, Pieter Wuille <bitcoin-dev@wuille.net> wrote:
68  >
69  >> Hello all,
70  >>
71  >> here is a BIP draft for changing the checksum in native segwit addresses for v1 and higher, following the discussion in https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2020-December/018293.html
72  >>
73  >> Overall, the idea is:
74  >> * Define a new encoding which is a tweaked variant of Bech32, called Bech32m. It refers to the Bech32 section of BIP173, which remains in effect.
75  >> * Define a new segwit address encoding which replaces the corresponding section in BIP173. It prescribes using Bech32 for v0 witness addresses, and Bech32m for other versions.
76  >
77  > Of course I forgot the actual link: https://github.com/sipa/bips/blob/bip-bech32m/bip-bech32m.mediawiki
78  >
79  > Cheers,
80  >
81  > --
82  > Pieter
83  > _______________________________________________
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87