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Tezos: yet-another local-extension of the OCaml standard library







Tezos Octez implementation


Tezos is a blockchain that offers both consensus and meta-consensus, by which we mean that Tezos comes to consensus both about the state of its ledger, and also about how the
protocol and the nodes should adapt and upgrade.
For more information about the project, see https://tezos.com.

Getting started

Instructions to
install, start
, and
taking part in the
available at https://tezos.gitlab.io/.

The Tezos software

This repository hosts Octez, an implementation of the Tezos blockchain.
Octez provides a node, a client, a baker, an endorser, an accuser, and other tools, distributed with the Tezos economic protocols of Mainnet for convenience.

In more detail, this git repository contains:

  • the source code, in directory src/

  • tests (mainly system tests):

    • in a Python testing and execution framework, under tests_python/

    • in an OCaml system testing framework for Tezos called Tezt, under tezt/

  • the developer documentation of the Tezos software, under docs/

  • a few third-party libraries, adapted for Tezos, under vendors/

The Tezos software may run either on the nodes of
the main Tezos network (mainnet) or on various Tezos test

The documentation for developers, including developers of the Tezos software
and developer of Tezos applications and tools, is available
online at https://tezos.gitlab.io/. This documentation is always in
sync with the master branch which may however be slightly
desynchronized with the code running on the live networks.

The source code of Octez is placed under the MIT Open Source


Development workflow

All development of the Tezos code happens on
GitLab at https://gitlab.com/tezos/tezos. Merge requests
(https://gitlab.com/tezos/tezos/-/merge_requests) should usually
target the master branch; see the contribution

The issue tracker at https://gitlab.com/tezos/tezos/issues can be used
to report bugs and to request new simple features. The Tezos Agora
is another great place to
discuss the future of Tezos with the community at large.

Continuous Integration

Running CI pipelines in your forks using GitLab's shared runners
may fail, for instance because tests may take too long to run.
The CI of tezos/tezos (i.e. https://gitlab.com/tezos/tezos)
uses custom runners that do not have this issue.
If you create a merge request targeting tezos/tezos, pipelines
for your branch will run using those custom runners.
To trigger those pipelines you need to be a developer in the
tezos/tezos project. Otherwise, reviewers can do that for you.

Development of the Tezos protocol

The core of the Tezos software that implements the economic ruleset is
called the protocol. Unlike the rest of the source code, updates to the
protocol must be further adopted through the Tezos
on-chain voting
. Protocol
contributors are encouraged to synchronize their contributions to
minimize the number of protocol proposals that the stakeholders have
to study and to maximize the throughput of the voting procedure.


Links to community websites are gathered in the following community portals:

  • https://www.tezos.help/

  • https://developers.tezos.com/ (for developers of applications built on Tezos)