From: "Russell O'Connor" <roconnor@blockstream•com>
To: Anthony Towns <aj@erisian•com.au>
Cc: jonasd.nick@gmail•com,
Bitcoin Protocol Discussion
<bitcoin-dev@lists•linuxfoundation.org>,
Pieter Wuille <pieter.wuille@gmail•com>
Subject: Re: [bitcoin-dev] BIP-341: Committing to all scriptPubKeys in the signature message
Date: Sat, 2 May 2020 17:15:51 -0400 [thread overview]
Message-ID: <CAMZUoKmrD78naPBcfGsfr_OxyYiWM+G47sWtpNGP+u-9r4MjXA@mail.gmail.com> (raw)
In-Reply-To: <20200502142602.rj7q2m32ew6trh6u@erisian.com.au>
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On Sat, May 2, 2020 at 10:26 AM Anthony Towns <aj@erisian•com.au> wrote:
>
> except that we'd arguably still be missing:
>
> is this a coinbase output? (Coin.fCoinBase)
> what was the height of the coin? (Coin.nHeight)
>
> Maybe committing to the coinbase flag would have some use, but committing
> to the height would make it hard to chain unconfirmed spends, so at
> least that part doesn't seem worth adding.
>
To add to this point, the height of the coin is something that is *not*
currently covered by any signature mode and including it would constitute a
change of an entirely different caliber; a change that I would strongly
caution against for your above reason and more.
The coinbase output flag is currently covered by the signature as the
outpoint hash has the required information (its prevout index of 0xFFFFFFFF
is only legal in a coinbase transaction). While I'm not particularly
enthusiastic about making it easier to distinguish coinbase outputs from
other outputs, and I worry a little about alternative designs for
implementing the Bitcoin protocol where this information is not so readily
available, I suppose I won't really oppose adding it. However, I don't
think anyone is seriously proposing it.
-
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next prev parent reply other threads:[~2020-05-02 21:16 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-29 14:57 Andrew Kozlik
2020-05-01 6:57 ` Jeremy
2020-05-01 8:48 ` Andrew Kozlik
2020-05-01 12:23 ` Russell O'Connor
2020-05-01 12:25 ` Greg Sanders
2020-05-02 4:35 ` Jeremy
2020-05-02 14:26 ` Anthony Towns
2020-05-02 14:43 ` Russell O'Connor
2020-05-02 21:15 ` Russell O'Connor [this message]
2020-05-04 15:48 ` Andrew Kozlik
2020-05-02 12:53 ` David A. Harding
2020-05-05 10:20 ` Jonas Nick
2020-05-11 22:12 ` Pieter Wuille
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