MIME-Version: 1.0
References: <jfRUzc8uB5fpIQy-a_TfTwjAD4FMtf2eInfHdgZRoLwc0NdTv7srnRLtmwFHPLInJfglSzOXXe0SVR3cgHejGPi0Kwl81UV_wkwVJcQi1rA=@wuille.net>
In-Reply-To: <jfRUzc8uB5fpIQy-a_TfTwjAD4FMtf2eInfHdgZRoLwc0NdTv7srnRLtmwFHPLInJfglSzOXXe0SVR3cgHejGPi0Kwl81UV_wkwVJcQi1rA=@wuille.net>
From: nakagat <nakagat@gmail.com>
Date: Fri, 15 Jan 2021 17:01:24 +0900
Message-ID: <CAHk9a9d_xm2nO1t5GsLJiny1V3H=uv8jGuUTywQetZQOXxyG9w@mail.gmail.com>
To: Pieter Wuille <bitcoin-dev@wuille.net>, 
 Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
Subject: Re: [bitcoin-dev] Bech32m BIP: new checksum,
	and usage for segwit address
Precedence: list

Dear Pieter,

I read the BIP draft of Bech32m and implemented it in Go.

Let me ask you one question.
Does Checksum have to be fixed?
The 'bech32_verify_checksum' function has hrp and data as parameters,
so how about committing Checksum with these two values?

For example, calculate Checksum from hrp and data using hash, chacha20, etc=
.

Thank you.
Takatoshi Nakagawa

2021=E5=B9=B41=E6=9C=885=E6=97=A5(=E7=81=AB) 9:14 Pieter Wuille via bitcoin=
-dev
<bitcoin-dev@lists.linuxfoundation.org>:
>
> Hello all,
>
> here is a BIP draft for changing the checksum in native segwit addresses =
for v1 and higher, following the discussion in https://lists.linuxfoundatio=
n.org/pipermail/bitcoin-dev/2020-December/018293.html
>
> Overall, the idea is:
> * Define a new encoding which is a tweaked variant of Bech32, called Bech=
32m. It refers to the Bech32 section of BIP173, which remains in effect.
> * Define a new segwit address encoding which replaces the corresponding s=
ection in BIP173. It prescribes using Bech32 for v0 witness addresses, and =
Bech32m for other versions.
>
> Comments, suggestions, ideas?
>
> Cheers,
>
> --
> Pieter
>
>
>
>
> _______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev@lists.linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev