From: "Russell O'Connor" <roconnor@blockstream•com>
To: ZmnSCPxj <ZmnSCPxj@protonmail•com>,
Bitcoin Protocol Discussion
<bitcoin-dev@lists•linuxfoundation.org>
Subject: Re: [bitcoin-dev] Unlimited covenants, was Re: CHECKSIGFROMSTACK/{Verify} BIP for Bitcoin
Date: Sun, 4 Jul 2021 22:10:17 -0400 [thread overview]
Message-ID: <CAMZUoKnjAd8hUpa5nZyPWTx_uxHtLL8XOjbROxobfAC+6yMWUA@mail.gmail.com> (raw)
In-Reply-To: <CAMZUoKnVLRLgL1rcq8DYHRjM--8VEUC5kjUbzbY5S860QSbk5w@mail.gmail.com>
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On Sun, Jul 4, 2021 at 9:02 PM Russell O'Connor <roconnor@blockstream•com>
wrote:
> Bear in mind that when people are talking about enabling covenants, we are
> talking about whether OP_CAT should be allowed or not.
>
> That said, recursive covenants, the type that are most worrying, seems to
> require some kind of OP_TWEAK operation, and I haven't yet seen any
> evidence that this can be simulated with CHECKSIG(FROMSTACK). So maybe we
> should leave such worries for the OP_TWEAK operation.
>
Upon further thought, you can probably make recursive covenants even with a
fixed scritpubkey by sneaking the state into a few bits of the UTXO's
amount. Or if you try really hard, you may be able to stash your state
into a sibling output that is accessed via the txid embedded in the
prevoutpoint.
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next prev parent reply other threads:[~2021-07-05 2:10 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-03 16:31 [bitcoin-dev] " Jeremy
2021-07-03 17:50 ` Russell O'Connor
2021-07-03 18:30 ` Jeremy
2021-07-03 20:12 ` Russell O'Connor
2021-07-04 17:30 ` Jeremy
2021-07-04 19:03 ` Russell O'Connor
2021-07-06 17:54 ` Jeremy
2021-07-06 18:21 ` Russell O'Connor
2021-07-06 18:53 ` Jeremy
2021-07-04 1:13 ` David A. Harding
2021-07-04 18:39 ` Jeremy
2021-07-04 20:32 ` [bitcoin-dev] Unlimited covenants, was " David A. Harding
2021-07-04 20:50 ` Billy Tetrud
2021-07-05 0:50 ` ZmnSCPxj
2021-07-05 1:02 ` Russell O'Connor
2021-07-05 2:10 ` Russell O'Connor [this message]
2021-07-05 2:39 ` ZmnSCPxj
2021-07-05 5:04 ` Anthony Towns
2021-07-05 13:46 ` Matt Corallo
2021-07-05 13:51 ` Greg Sanders
2022-02-03 6:17 ` Anthony Towns
2021-07-05 17:20 ` Russell O'Connor
2021-07-06 6:25 ` Billy Tetrud
2021-07-06 10:20 ` Sanket Kanjalkar
2021-07-06 11:26 ` Russell O'Connor
2021-07-06 18:36 ` Jeremy
2021-07-07 4:26 ` ZmnSCPxj
2021-07-07 6:12 ` Billy Tetrud
2021-07-07 13:12 ` Russell O'Connor
2021-07-07 14:24 ` Russell O'Connor
2021-07-07 17:26 ` Jeremy
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