OCaml expert and beginner training by OCamlPro (in French): Nov. 5-6 & 7-8

In our endeavour to encourage professional programmers to understand and use OCaml, OCamlPro will be giving two training sessions, in French, in our Paris offices: OCaml Beginner course for professional programmers (5-6 Nov) OCaml Expertise (7-8 Nov). The “Expert” OCaml course is for already experienced OCaml programmers to better understand advanced type system possibilities (objects,[…]

opam 2.0.5 release

We are pleased to announce the minor release of opam 2.0.5. This new version contains build update and small fixes: Bump src_ext Dune to 1.6.3, allows compilation with OCaml 4.08.0. [#3887 @dra27] Support Dune 1.7.0 and later [#3888 @dra27 – fix #3870] Bump the ocaml_mccs lib-ext, to include latest changes [#3896 @AltGr] Fix cppo detection[…]

The Alt-Ergo SMT Solver’s results in the SMT-COMP 2019

The results of the SMT-COMP 2019 were released a few days ago at the SMT whorkshop during the 22nd SAT conference. We were glad to participate in this competition for the second year in a row, especially as Alt-Ergo now supports the SMT-LIB 2 standard. Alt-Ergo is an open-source SAT-solver maintained and distributed by OCamlPro[…]

Blockchains @ OCamlPro: an Overview

OCamlPro started working on blockchains in 2014, when Arthur Breitman came to us with an initial idea to develop the Tezos ledger. The idea was very challenging with a lot of innovations. So, we collaborated with him to write a specification, and to turn the specification into OCaml code. Since then, we continually improved our skills[…]

opam 2.0.4 release

We are pleased to announce the release of opam 2.0.4. This new version contains some backported fixes: Sandboxing on macOS: considering the possibility that TMPDIR is unset [#3597 @herbelin – fix #3576] display: Fix opam config var display, aligned on opam config list [#3723 @rjbou – rel. #3717] pin: update source of (version) pinned directory[…]

Announcing Liquidity version 1.0

Liquidity version 1.0 We are pleased to announce the release of the first major version of the Liquidity smart-contract language and associated tools. Some of the highlights of this version are detailed below. Multiple Entry Points In the previous versions of Liquidity, smart contracts were limited to a single entry point (named main). But traditionally[…]

Techelson, a test execution engine for Michelson

We are pleased to announce the first release of Techelson, available here. Techelson is a Test Execution Engine for Michelson. It aims at testing functional properties of Michelson smart contracts. Make sure to check the user documentation to get a sense of Techelson’s workflow and features. For Liquidity programmers interested in Techelson, take a look at[…]

Signing Data for Smart Contracts

Smart contracts calls already provide a built-in authentication mechanism as transactions (i.e. call operations) are cryptographically signed by the sender of the transaction. This is a guarantee on which programs can rely. However, sometimes you may want more involved or flexible authentication schemes. The ones that rely on signature validity checking can be implemented in[…]

What’s new for Alt-Ergo in 2018 ? Here is a recap !

After the hard work done on the integration of floating-point arithmetic reasoning two years ago, 2018 is the year of polymorphic SMT2 support and efficient SAT solving for Alt-Ergo. In this post, we recap the main novelties last year, and we announce the first Alt-Ergo Users’ Club meeting. An SMT2 front-end with prenex polymorphism As[…]

Tezos and OCamlPro

A reflection on the new year… Today, Tezos is a global network and an open source project with developers spanning over five continents. In the inception of this project, the French company OCamlPro which, to this day, stills develops numerous projects around Tezos, played a particularly important role. Indeed, they were the first home of[…]

Improving Tezos Storage

Running a Tezos node currently costs a lot of disk space, about 59 GB for the context database, the place where the node stores the states corresponding to every block in the blockchain, since the first one. Of course, this is going to decrease once garbage collection is integrated, i.e. removing very old information, that[…]

opam 2.0.2 release

We are pleased to announce the release of opam 2.0.2. As sandbox scripts have been updated, don’t forget to run opam init –reinit -ni to update yours. This new version contains mainly backported fixes: Doc: update man page add message for deprecated options reinsert removed ones to print a deprecated message instead of fail (e.g.[…]

OCamlPro’s TZScan grant proposal accepted by the Tezos Foundation – joint press release

Tezos Foundation and OCamlPro joint press release – October 17, 2018 We are pleased to announce  that the Tezos Foundation has issued a grant to OCamlPro to support its work on TzScan, a block explorer for the Tezos blockchain that will be made open-source. OCamlPro is a French company and R&D lab, focused on OCaml[…]

opam 2.0.0 RC4-final is out!

We are happy to announce the opam 2.0.0 final release candidate! 🍾 This release features a few bugfixes over Release Candidate 3. It will be promoted to 2.0.0 proper within a few weeks, when the official repository format switches from 1.2.0 to 2.0.0. After that date, updates to the 1.2.0 repository may become limited, as[…]

OCaml JTRT

This time of the year is, just like Christmas time, a time for laughs and magic… although the magic we are talking about, in the OCaml community, is not exactly nice, nor beautiful. Let’s say that we are somehow akin to many religions: we know magic does exist , but that it is satanic and[…]

Release of Alt-Ergo 2.1.0

A new release of Alt-Ergo (version 2.1.0) is available on Alt-Ergo’s website: https://alt-ergo.ocamlpro.com/#releases. An OPAM package for it will be published soon. In this release, we mainly improved the CDCL-based SAT solver to get performances similar to/better than the old Tableaux-like SAT. The CDCL solver is now the default Boolean reasoner. The full list of[…]