This has actually never been true (Sapio assumes extensions).
If the extensions are not present, you can stub them out with a signing federation instead, configurable as flags, and you can also write many contracts that do not use the ctv based components at all.
The protocol for emulation is a bit clever (if I do say so myself) since it ensures that contract compilation is completely offline and the oracles are completely stateless.
Relevant links:
Cheers,
Jeremy
Simplicity does not compile to Bitcoin Script, and Sapio assumes extensions
to Bitcoin Script that are not currently part of the consensus code.
On Tue, Aug 24, 2021 at 03:36:29PM +0800, Gijs van Dam via bitcoin-dev wrote:
> Hi,
>
>
> Bitcoin does not have a virtual machine. But you do have [Miniscript][1],
> [Min.sc][2], [Simplicity][3] and [Sapio][4]. These are all higher level
> languages that compile to Bitcoin Script. Sapio is "just" Rust, so that
> might fit your setting best.
>
> By the way, this question also has an answer on [Bitcoin Stackexchange][5]
> which is a great resource for questions like this.
>
> [1]: http://bitcoin.sipa.be/miniscript/
> [2]: https://min.sc/
> [3]: https://github.com/ElementsProject/simplicity
> [4]: https://learn.sapio-lang.org/
> [5]:
> https://bitcoin.stackexchange.com/questions/108261/is-there-a-tool-like-ethereum-evm-at-present-for-bitcoin-script
>
> On Tue, Aug 24, 2021 at 2:55 PM Null Null via bitcoin-dev <
> bitcoin-dev@lists.linuxfoundation.org> wrote:
>
> > Hi all,
> >
> > Is there a tool like Ethereum EVM at present? Users can write bitcoin
> > scripts in a syntax just like python(or like other programming language);
> > through this tool, they can be translated into bitcoin original scripts; it
> > sounds like a new programming language has been invented.
> >
> > In my opinion, Bitcoin script programming is based on reverse Polish
> > expression; this is not friendly to programmers;
> >
> > In fact, Bitcoin's opcode expression ability is very rich, and it may be
> > unfriendly, which has affected the promotion of Bitcoin in the technical
> > community.
> >
> > Hope for hearing some voice about this.
> >
> > Best wish.
> >
> > _______________________________________________
> > bitcoin-dev mailing list
> > bitcoin-dev@lists.linuxfoundation.org
> > https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
> >
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