mi-cho-coq
ocaml
mi-cho-coq | ocaml | |
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7 | 119 | |
- | 5,175 | |
- | 0.7% | |
- | 9.9 | |
- | about 12 hours ago | |
OCaml | ||
- | GNU General Public License v3.0 or later |
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mi-cho-coq
- Every link DEVs interested on Tezos should know
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12 reasons Cardano can't scale in 2022
There are similarities between the promises made by Cardano and what you find in Tezos: * proof-of-stake L1s * on-chain voting: Voltaire for Cardano vs periodic elections on Tezos (already 8 important upgrades of the protocol that were voted for, with the Foundation abstaining!) * formal verification of contracts and the chain itself: mentioned here for Cardano vs several projects in Tezos (Mi-Cho-Coq, foobar.land, both using the Coq proof assistant) * ongoing work on L2s: Hydra for Cardano vs Deku, zkRollups and optimistic rollups as well (a bit similar to Arbitrum IIRC).
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Formal Verification: Tezos’s Feature Nobody Talks About
We are not working with LIGO to verify smart contracts, more with Mi-Cho-Coq which aims to verify smart contracts directly at the Michelson level. Using Mi-Cho-Coq it is possible to verify the Michelson output of LIGO or SmartPy. I heard LIGO people also have projects to do verification directly at the LIGO's level or verify the implementation of the LIGO compiler.
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Front running and general architecture?
Formal verification for smart contracts. Many (Not all) categories of vulnerabilities can be avoided that way. See fe: https://medium.com/coinmonks/verify-a-smart-contract-with-archetype-6e0ea548e2da or https://gitlab.com/nomadic-labs/mi-cho-coq which can be used on any michelson code.
- About Michelson design
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ELI5 This “superior tech” Tezos has
The link to the Coq formalization of Michelson, to formally verify smart-contracts: https://gitlab.com/nomadic-labs/mi-cho-coq
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Supporting EVM, WASM Bitcoin Script, etc.
Web assembly is stack-based and there are tools like KWasm for formal verification - so a move to WASM is a more likely candidate... but Michelson is a very capable and verifiable stack based low-level language too. https://gitlab.com/nomadic-labs/mi-cho-coq/
ocaml
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Autoconf makes me think we stopped evolving too soon
> OCaml’s configure script is also “normal”
If that’s this OCaml, it has a configure.ac file in the root directory, which looks suspicious for an Autotools-free package: https://github.com/ocaml/ocaml
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The Return of the Frame Pointers
You probably already know, but with OCaml 5 the only way to get flamegraphs working is to either:
* use framepointers [1]
* use LBR (but LBR has a limited depth, and may not work on on all CPUs, I'm assuming due to bugs in perf)
* implement some deep changes in how perf works to handle the 2 stacks in OCaml (I don't even know if this would be possible), or write/adapt some eBPF code to do it
OCaml 5 has a separate stack for OCaml code and C code, and although GDB can link them based on DWARF info, perf DWARF call-graphs cannot (https://github.com/ocaml/ocaml/issues/12563#issuecomment-193...)
If you need more evidence to keep it enabled in future releases, you can use OCaml 5 as an example (unfortunately there aren't many OCaml applications, so that may not carry too much weight on its own).
[1]: I haven't actually realised that Fedora39 has already enabled FP by default, nice! (I still do most of my day-to-day profiling on an ~CentOS 7 system with 'perf --call-graph dwarf', I was aware that there was a discussion to enable FP by default, but haven't noticed it has actually been done already)
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Top Paying Programming Technologies 2024
11. OCaml - $91,026
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OCaml: a Rust developer's first impressions
> It partially helps since it forces you to have types where they matters most: exported functions
But the problém the OP has is not knowing the types when reading the source (in the .ml file).
> How would it feels like to use list if only https://github.com/ocaml/ocaml/blob/trunk/stdlib/list.ml was available,
If the signature where in the source file (which you can do in OCaml too), there would be no problem - which is what all the other (for some definition of "other") languages except C and C++ (even Fortran) do.
No, really, I can't see a single advantage of separate .mli files at all. The real problém is that the documentation is often worse too, as the .mli is autogenerated and documented afterwards - and now changes made later in the sources need to be documented in the mli too, so anything that doesn't change the type often gets lost. The same happens in C and C++ with header files.
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Bringing more sweetness to ruby with sorbet types 🍦
If you have been in the Ruby community for the past couple of years, it's possible that you're not a super fan of types or that this concept never passed through your mind, and that's totally cool. I myself love the dynamic and meta-programming nature of Ruby, and honestly, by the time of this article's writing, we aren't on the level of OCaml for type checking and inference, but still, there are a couple of nice things that types with sorbet bring to the table:
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What is gained and lost with 63-bit integers? (2014)
Looks like there have been proposals to eliminate use of 3 operand lea in OCaml code (not accepted sadly):
https://github.com/ocaml/ocaml/pull/8531
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Notes about the ongoing Perl logo discussion
An amazing example is Ocaml lang logo / mascot. It might be useful to talk with them to know what was the process behind this work. The About page camel head on Perl dot org header is also a pretty good example of simplification, but it's not a logo, just a friendly illustration, as the O'Reilly camel is. Another notable logo for this animal is the well known tobacco industry company, but don't get me started on that (“good” logo, though, if we look at the effectiveness of their marketing).
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What can Category Theory do?
Haskell and Agda are probably the most obvious examples. Ocaml too, but it is much older, so its type system is not as categorical. There is also Idris, which is not as well-known but is very cool.
- Playing Atari Games in OCaml
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Bloat
That does sound problematic, but without the code it is hard to tell what is the issue. Typically, compiling a 6kLoc file like https://github.com/ocaml/ocaml/blob/trunk/typing/typecore.ml takes 0.8 s on my machine.
What are some alternatives?
juvix - Juvix empowers developers to write code in a high-level, functional language, compile it to gas-efficient output VM instructions, and formally verify the safety of their contracts prior to deployment and execution.
Alpaca-API - The Alpaca API is a developer interface for trading operations and market data reception through the Alpaca platform.
cardano-ledger - The ledger implementation and specifications of the Cardano blockchain.
VisualFSharp - The F# compiler, F# core library, F# language service, and F# tooling integration for Visual Studio
hicdex
dune - A composable build system for OCaml.
CIPs
TradeAlgo - Stock trading algorithm written in Python for TD Ameritrade.
tzkt - 😼 Awesome Tezos blockchain indexer and API
melange - A mixture of tooling combined to produce JavaScript from OCaml & Reason
Conseil - Query API and indexer for Tezos and other decentralized platforms.
rust - Rust for the xtensa architecture. Built in targets for the ESP32 and ESP8266