From: ZmnSCPxj <ZmnSCPxj@protonmail•com>
To: Zac Greenwood <zachgrw@gmail•com>
Cc: Bitcoin Protocol Discussion <bitcoin-dev@lists•linuxfoundation.org>
Subject: Re: [bitcoin-dev] Exploring: limiting transaction output amount as a function of total input value
Date: Tue, 31 Aug 2021 14:22:29 +0000 [thread overview]
Message-ID: <A8O_5wbTwq48sO02LAHT_t0RN0GVY0yrygt2DiSPrCavXCYu_0LsZWKf3jEQUyBbboW7zQnXyVSHkNJV7CP-VliKOYXjmmnfQIF2Q6E4pl8=@protonmail.com> (raw)
In-Reply-To: <CAJ4-pEC_NTScPFg822Va+Sw1_yC87tWBAL4y7y-m7PSx+JcccQ@mail.gmail.com>
Good morning Zac,
> Hi ZmnSCPxj,
>
> Thank you for your helpful response. We're on the same page concerning privacy so I'll focus on that. I understand from your mail that privacy would be reduced by this proposal because:
>
> * It requires the introduction of a new type of transaction that is different from a "standard" transaction (would that be P2TR in the future?), reducing the anonymity set for everyone;
> * The payment and change output will be identifiable because the change output must be marked encumbered on-chain;
> * The specifics of how the output is encumbered must be visible on-chain as well reducing privacy even further.
>
> I don't have the technical skills to judge whether these issues can somehow be resolved. In functional terms, the output should be spendable in a way that does not reveal that the output is encumbered, and produce a change output that cannot be distinguished from a non-change output while still being encumbered. Perhaps some clever MAST-fu could somehow help?
I believe some of the covenant efforts may indeed have such clever MAST-fu integrated into them, which is why I pointed you to them --- the people developing these (aj I think? RubenSomsen?) might be able to accommodate this or some subset of the desired feature in a sufficiently clever covenant scheme.
There are a number of such proposals, though, so I cannot really point you to one that seems likely to have a lot of traction.
Regards,
ZmnSCPxj
next prev parent reply other threads:[~2021-08-31 14:22 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-21 5:56 [bitcoin-dev] Covenant opcode proposal OP_CONSTRAINDESTINATION (an alternative to OP_CTV) Billy Tetrud
2021-07-25 5:38 ` David A. Harding
2021-07-25 19:49 ` Billy Tetrud
2021-07-26 0:05 ` David A. Harding
[not found] ` <SN7PR18MB3981DC1CD23B90367045995FD2E89@SN7PR18MB3981.namprd18.prod.outlook.com>
2021-07-26 20:18 ` Billy Tetrud
2021-07-26 21:08 ` James MacWhyte
2021-07-27 0:41 ` Billy Tetrud
2021-07-27 11:18 ` Zac Greenwood
2021-07-27 17:21 ` Billy Tetrud
2021-07-28 4:57 ` Zac Greenwood
2021-07-28 17:57 ` Billy Tetrud
2021-07-28 22:30 ` Jeremy
2021-07-30 18:42 ` Billy Tetrud
2021-11-01 1:19 ` Billy Tetrud
2021-07-31 20:01 ` [bitcoin-dev] Exploring: limiting transaction output amount as a function of total input value Zac Greenwood
2021-08-02 4:40 ` Billy Tetrud
2021-08-10 2:17 ` ZmnSCPxj
2021-08-13 11:02 ` Zac Greenwood
2021-08-14 1:50 ` ZmnSCPxj
2021-08-16 11:17 ` Zac Greenwood
2021-08-16 11:48 ` ZmnSCPxj
2021-08-30 14:43 ` Zac Greenwood
2021-08-31 9:00 ` ZmnSCPxj
2021-08-31 14:09 ` Zac Greenwood
2021-08-31 14:22 ` ZmnSCPxj [this message]
2021-09-01 15:15 ` Zac Greenwood
2021-08-01 8:09 Zac Greenwood
2021-08-02 9:32 ` Zac Greenwood
2021-08-03 18:12 ` Billy Tetrud
2021-08-04 10:48 ` Zac Greenwood
2021-08-05 6:39 ` Billy Tetrud
2021-08-05 14:22 ` Zac Greenwood
2021-08-10 0:41 ` Billy Tetrud
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='A8O_5wbTwq48sO02LAHT_t0RN0GVY0yrygt2DiSPrCavXCYu_0LsZWKf3jEQUyBbboW7zQnXyVSHkNJV7CP-VliKOYXjmmnfQIF2Q6E4pl8=@protonmail.com' \
--to=zmnscpxj@protonmail$(echo .)com \
--cc=bitcoin-dev@lists$(echo .)linuxfoundation.org \
--cc=zachgrw@gmail$(echo .)com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox