From: "Hampus Sjöberg" <hampus.sjoberg@gmail•com>
To: Mark Boldyrev <markboldyrev@gmail•com>
Cc: Bitcoin Protocol Discussion <bitcoin-dev@lists•linuxfoundation.org>
Subject: Re: [bitcoin-dev] A proposal to reintroduce the disabled script opcodes
Date: Fri, 19 May 2017 15:13:03 +0200 [thread overview]
Message-ID: <CAFMkqK8u37rLfwdx_d2oX0a9p2J=vvGcmSkNfj-LS2krOb+f6w@mail.gmail.com> (raw)
In-Reply-To: <CAK9dXBSg+wzAZw7_xPXRVvx1uZzjAEE8nuvj0vkdSGD-yTfwhQ@mail.gmail.com>
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AFAICT, re-enabling these old OP-codes would require a hardfork.
If we had SegWit enabled, we could via a soft fork allocate new OP-codes
for the same functionality (by introducing a new version of Script).
I believe the Elements alpha project has been experimenting with
re-enabling old OP-codes: https://elementsproject.org/elements/opcodes/
2017-05-19 8:07 GMT+02:00 Mark Boldyrev via bitcoin-dev <
bitcoin-dev@lists•linuxfoundation.org>:
> Back in 2010, there was a bug found in Core which allowed
> denial-of-service attacks due to the software crashing on some machines
> while executing a script - see CVE-2010-537.
> I believe the removed ("disabled") opcodes should be re-introduced along
> with a standardized behavior definition.
> For example, when execution of an opcode results in an arithmetic error,
> such as OP_DIV with a zero divisor, the script should exit and fail.
> The string splice opcodes should also check their arguments for
> correctness, etc.
>
> These opcodes would enhance the flexibility of scripts and allow
> sophisticated native smart contracts to be created.
>
> _______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev@lists•linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>
>
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next prev parent reply other threads:[~2017-05-19 13:13 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-19 6:07 Mark Boldyrev
2017-05-19 13:13 ` Hampus Sjöberg [this message]
2017-05-22 14:09 ` Peter Todd
2017-05-22 14:41 ` Ethan Heilman
2017-05-22 16:14 ` Peter Todd
2017-05-22 16:43 ` Ethan Heilman
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