📅 Original date posted:2016-11-03
📝 Original message:Right. There are minor trade-offs to be made with regards to that design
point of OP_CHECKSIGFROMSTACKVERIFY. Fortunately this covenant
construction isn't sensitive to that choice and can be made to work with
either implementation of OP_CHECKSIGFROMSTACKVERIFY.
On Wed, Nov 2, 2016 at 11:35 PM, Johnson Lau <jl2012 at xbt.hk> wrote:
> Interesting. I have implemented OP_CHECKSIGFROMSTACKVERIFY in a different
> way from the Elements. Instead of hashing the data on stack, I directly put
> the 32 byte hash to the stack. This should be more flexible as not every
> system are using double-SHA256
>
> https://github.com/jl2012/bitcoin/commits/mast_v3_master
>
>
> On 3 Nov 2016, at 01:30, Russell O'Connor via bitcoin-dev <
> bitcoin-dev at lists.linuxfoundation.org> wrote:
>
> Hi all,
>
> It is possible to implement covenants using two script extensions: OP_CAT
> and OP_CHECKSIGFROMSTACKVERIFY. Both of these op codes are already
> available in the Elements Alpha sidechain, so it is possible to construct
> covenants in Elements Alpha today. I have detailed how the construction
> works in a blog post at <https://blockstream.com/2016/
> 11/02/covenants-in-elements-alpha.html>. As an example, I've constructed
> scripts for the Moeser-Eyal-Sirer vault.
>
> I'm interested in collecting and implementing other useful covenants, so
> if people have ideas, please post them.
>
> If there are any questions, I'd be happy to answer.
>
> --
> Russell O'Connor
> _______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev at lists.linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>
>
>
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Russell O'Connor [ARCHIVE] /
npub1dw…8plrw
2023-06-07 17:54:14
in reply to nevent1q…atjr
Author Public Key
npub1dw88wd5gqsqn6ufxhf9h03uk8087l7gfzdtez5csjlt6pupu4pwsj8plrwPublished at
2023-06-07 17:54:14Event JSON
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"content": "📅 Original date posted:2016-11-03\n📝 Original message:Right. There are minor trade-offs to be made with regards to that design\npoint of OP_CHECKSIGFROMSTACKVERIFY. Fortunately this covenant\nconstruction isn't sensitive to that choice and can be made to work with\neither implementation of OP_CHECKSIGFROMSTACKVERIFY.\n\nOn Wed, Nov 2, 2016 at 11:35 PM, Johnson Lau \u003cjl2012 at xbt.hk\u003e wrote:\n\n\u003e Interesting. I have implemented OP_CHECKSIGFROMSTACKVERIFY in a different\n\u003e way from the Elements. Instead of hashing the data on stack, I directly put\n\u003e the 32 byte hash to the stack. This should be more flexible as not every\n\u003e system are using double-SHA256\n\u003e\n\u003e https://github.com/jl2012/bitcoin/commits/mast_v3_master\n\u003e\n\u003e\n\u003e On 3 Nov 2016, at 01:30, Russell O'Connor via bitcoin-dev \u003c\n\u003e bitcoin-dev at lists.linuxfoundation.org\u003e wrote:\n\u003e\n\u003e Hi all,\n\u003e\n\u003e It is possible to implement covenants using two script extensions: OP_CAT\n\u003e and OP_CHECKSIGFROMSTACKVERIFY. Both of these op codes are already\n\u003e available in the Elements Alpha sidechain, so it is possible to construct\n\u003e covenants in Elements Alpha today. I have detailed how the construction\n\u003e works in a blog post at \u003chttps://blockstream.com/2016/\n\u003e 11/02/covenants-in-elements-alpha.html\u003e. As an example, I've constructed\n\u003e scripts for the Moeser-Eyal-Sirer vault.\n\u003e\n\u003e I'm interested in collecting and implementing other useful covenants, so\n\u003e if people have ideas, please post them.\n\u003e\n\u003e If there are any questions, I'd be happy to answer.\n\u003e\n\u003e --\n\u003e Russell O'Connor\n\u003e _______________________________________________\n\u003e bitcoin-dev mailing list\n\u003e bitcoin-dev at lists.linuxfoundation.org\n\u003e https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev\n\u003e\n\u003e\n\u003e\n-------------- next part --------------\nAn HTML attachment was scrubbed...\nURL: \u003chttp://lists.linuxfoundation.org/pipermail/bitcoin-dev/attachments/20161103/8e963659/attachment.html\u003e",
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