From: Peter Todd <pete@petertodd•org>
To: Ethan Heilman <eth3rs@gmail•com>,
Bitcoin Protocol Discussion
<bitcoin-dev@lists•linuxfoundation.org>
Subject: Re: [bitcoin-dev] Proposed BIP for OP_CAT
Date: Thu, 26 Oct 2023 21:55:48 +0000 [thread overview]
Message-ID: <ZTrgZPwv1BlXqyWV@petertodd.org> (raw)
In-Reply-To: <CAEM=y+XDB7GGa5BTAWrQHqTqQHBE2VRyd7VWjEb+zCOMzRP+Lg@mail.gmail.com>
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On Sat, Oct 21, 2023 at 01:08:03AM -0400, Ethan Heilman via bitcoin-dev wrote:
> OP_CAT fails if there are less than two values on the stack or if a
> concatenated value would have a combined size of greater than the
> maximum script element size of 520 Bytes.
Note that if OP_CAT immediately _succeeds_ if the combined size is >= 520
bytes, reverting to the behavior of OP_SUCCESSx, the maximum size can be
increased in a subsequent soft fork.
Of course, this would often require extra opcodes to validate the size of
non-const arguments. But you'd only need another five or six bytes in many
cases:
SIZE <n> LESSTHAN VERIFY
<fixed data>
CAT
--
https://petertodd.org 'peter'[:-1]@petertodd.org
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next prev parent reply other threads:[~2023-10-26 21:55 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-21 5:08 Ethan Heilman
2023-10-21 5:49 ` alicexbt
2023-10-21 15:03 ` Andrew Poelstra
2023-10-26 16:04 ` James O'Beirne
2023-10-21 16:10 ` Greg Sanders
2023-10-21 20:24 ` Ethan Heilman
2023-10-22 8:58 ` vjudeu
2023-10-24 19:47 ` Steven Roose
2023-10-26 1:53 ` Ethan Heilman
2023-10-23 2:13 ` Rusty Russell
2023-10-23 12:26 ` Anthony Towns
2023-10-23 13:41 ` Andrew Poelstra
2023-10-24 0:48 ` Rusty Russell
2023-10-24 1:17 ` Andrew Poelstra
2023-10-24 3:45 ` Rusty Russell
2023-10-24 13:05 ` Andrew Poelstra
2023-10-26 21:55 ` Peter Todd [this message]
2023-10-27 18:32 ` Anthony Towns
2023-10-23 5:13 vjudeu
2023-10-26 14:30 ` Ryan Grant
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