From bitcoin-dev at rgrant.org  Sat Jun 12 20:56:55 2021
From: bitcoin-dev at rgrant.org (Ryan Grant)
Date: Sat, 12 Jun 2021 20:56:55 +0000
Subject: [Lightning-dev] BIP118 confusion / SIGHASH_NOINPUT is now
	SIGHASH_ANYPREVOUT (i think)
In-Reply-To: <CAMnpzfosBrAXY+kCW2ZRtsXLRCouGVak7S3mH8jXEgJNBmf8Ug@mail.gmail.com>
References: <CAMnpzfosBrAXY+kCW2ZRtsXLRCouGVak7S3mH8jXEgJNBmf8Ug@mail.gmail.com>
Message-ID: <CAMnpzfqtmvKUECn_eZiF16pWfXu_rdne8T4YyC021_T==BTOuw@mail.gmail.com>

Apologies, I found the discussion going on here:
  https://github.com/bitcoin/bips/pull/943

On Sat, Jun 12, 2021 at 7:52 PM Ryan Grant <bitcoin-dev at rgrant.org> wrote:
>
> Hi,
>
> I have detected some definite confusion among people who are not aware
> of the most recent updates to the bip118 draft.  I don't know if
> that's common among readers of these lists.
>
> Substantial edits to the bip118 draft were made through May 2019,
> including changing its official name to SIGHASH_ANYPREVOUT.  The
> internal heading "Revisions" discusses these changes.
>
>   https://github.com/ajtowns/bips/blob/c7c6a58b7a66a5dc5f4435319577d26a34082a79/bip-0118.mediawiki#Revisions
>   https://github.com/ajtowns/bips/compare/master...ajtowns:bip-anyprevout
>   https://github.com/ajtowns/bips/blob/c7c6a58b7a66a5dc5f4435319577d26a34082a79/bip-0118.mediawiki
>
> The version in bitcoin/bips was not modified since 2018, until it
> diverged by collecting a minor fix two months ago.  It still uses
> SIGHASH_NOINPUT terminology.
>
>   https://github.com/bitcoin/bips/blob/master/bip-0118.mediawiki
>
> AFAICT, with taproot activating, the preferred method to ease
> lightning network client state requirements will now definitely be
> SIGHASH_ANYPREVOUT.
>
> I am not aware of reasons for bip118's updated draft to sit on the
> sidelines before consideration by a wider audience.