Re: [Haskell-cafe] Haskell to Ethereum VM ?

Probably you are aware of Cardano (https://www.cardanohub.org/en/home/), a new generation blockchain platform which uses languages inspired from Haskell. From the whitepaper at https://whycardano.com/: "Systems such as Bitcoin provide an extremely inflexible and draconian scripting language that is difficult to program bespoke transactions in, and to read and understand. Yet the general programmability of languages such as Solidity introduce an extraordinary amount of complexity into the system and are useful to only a much smaller set of actors. Therefore, we have chosen to design a new language called Simon6 https://whycardano.com/#footnote6 in honor of its creator Simon Thompson and the creator of the concepts that inspired it, Simon Peyton Jones. Simon is a domain-specific language that is based upon Composing contracts: https://www.lexifi.com/files/resources/MLFiPaper.pdf an adventure in financial engineering. The principal idea is that financial transactions are generally composed from a collection of foundational elements7 https://whycardano.com/#footnote7 . If one assembles a financial periodic table of elements, then one can provide support for an arbitrarily large set of compound transactions that will cover most, if not all, common transaction types without requiring general programmability. The primary advantage is that security and execution can be extremely well understood. Proofs can be written to show correctness of templates and exhaust the execution space of problematic transaction events, such as the creation of new money out of thin https://en.bitcoin.it/wiki/Value_overflow_incident air or transaction https://en.bitcoin.it/wiki/Transaction_Malleability malleability. Second, one can leave in extensions to add more elements by way of soft forks if new functionality is required. That said, there will always be a need to connect CSL to overlay protocols, legacy financial systems, and special purpose servers. Thus we have developed Plutus https://github.com/input-output-hk/plutus-prototype as both a general purpose smart contract language and also a special purpose DSL for interoperability. Plutus is a typed functional language based on concepts from Haskell, which can be used to write custom transaction scripts. For CSL, it will be used for complex transactions required to add support for other layers we need to connect, such as our sidechains scheme." _____ From: Haskell-Cafe [mailto:haskell-cafe-bounces@haskell.org] On Behalf Of Takenobu Tani Sent: Friday, January 26, 2018 8:05 PM To: Patrick Mylund Nielsen Cc: haskell-cafe Subject: Re: [Haskell-cafe] Haskell to Ethereum VM ? Hi Carter, Patrick, Thank you for reply. Quorum is interesting! It would be very nice to be able to describe Ethereum's contract with Haskell DSL. The characteristics about immutable and type will fit DApps. Thank you very much, Takenobu 2018-01-27 2:55 GMT+09:00 Patrick Mylund Nielsen : The Quorum[1] team has been dreaming about such a Haskell-beginner-friendly bytecode-generating DSL for a very long time. The user experience of writing applications in a language where pitfalls are so non-obvious is one of the biggest pain points of Ethereum in general. We would warmly welcome something like this, and would definitely look to use it in Quorum. (Our EVM is the same as public Ethereum.) [1]: A permissioned/non-PoW version of Ethereum with high throughput and privacy - https://github.com/ https://github.com/jpmorganchase/quorum/ jpmorganchase/quorum/ On 1/26/2018 11:43 AM, Carter Schonwald wrote:

Hello Takenobu, while theres definitely a lot of haskell code out there that deals with ethereum (or implementing it!), i'm not aware of anything targeting the evm isa from haskell or any other mature functional programming language

On Fri, Jan 26, 2018 at 8:09 AM, Takenobu Tani

mailto:takenobu.hs@gmail.com> wrote:

Hi cafe,

Does anyone know about the code generator from Haskell's syntax to Ethereum VM language (bytecode)? That is, what corresponds to Solidity in Haskell.

Although Solidity is interesting, it's difficult for me to achieve quality and safety. Does such a project already exist?

Regards, Takenobu

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