MAX, a software suite for testing blockchain applications

MAX is a simulation environment for blockchain applications. It offers a library of ready-to-use blockchain models, like Bitcoin, Tendermint, Hyperledger, and more. Its agent-based simulation engine offers a wide range of testing scenarios for complex, distributed applications.


Testing and optimizing blockchain applications

Selecting blockchain technologies and consensus protocols with the optimal power and security tradeoffs is a complex process. With the incredibly wide variety of possible approaches available, blockchain application development can quickly become a head-scratcher. To help developers make sense of the myriad of options and speed up their projects, CEA-List researchers developed MAX, a blockchain application testing environment.

MAX is a true digital laboratory. It offers a set of simulation modules and APIs that let users create models and test their behaviors in various situations. MAX is agent-based, allowing it to explore scenarios of any type and complexity and to evaluate model performance in terms of technology, cost, environmental impact, and security.

Aside from the basic modules for creating peer-to-peer networks, MAX’s library offers ready-to-use blockchains for experimentation: Bitcoin, Hyperledger, Tendermint, Sycomore, Bitcoin-Lightning, etc.

MAX is written in Java and is open source.

Simulated technology library, Java, APIs, and more

Main advantages:

  • A complete and growing blockchain model library containing most of the popular blockchains.
  • A multi-agent simulator, widening the range of experimental possibilities, including cybersecurity analysis.
  • Java APIs, allowing the simulator to integrate real contexts and data.
  • Code written in Java, meaning simulations can be executed in your business’s testing environment (such as in a DevOps toolchain, for example).

Les technologies de type blockchain offrent des registres distribués immuables et sécurisés pour stocker des transactions sans organe de contrôle, mais elles manquent de fiabilité et ne passent pas à l’échelle. L’institut du CEA List développe des solutions pour renforcer la confiance et la performance des applications décentralisées de demain.

Designing and optimizing applications

  • Development of applications based on existing blockchains—technology comparison, performance analysis, carbon footprint evaluation, etc.
  • Deployment of blockchain applications—configuration optimization, resistance to cyberattacks, etc.
  • Creation of new blockchain technologies—choice of network models, consensus protocols, optimization of configuration and environmental impact, etc.
Cas d'usage

Blockchain protects drone flights

The EU ADACORSA project aims to support the expanding array of new use cases that take drones out of their human pilots’ line of sight, referred to as BVLOS (Beyond Visual Line of Sight) operations. One of its stated goals is to develop technologies that will secure the communications, authentication, and identification of these unmanned aircraft circulating over our heads.

CEA-List is a project partner, contributing scientific expertise in blockchain and multi-agent simulation to develop solutions based on distributed exchange architectures.


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A Computational Study on Fairness of the Tendermint Blockchain Protocol, N. Lagaillardie, M. A. Djari, Ö. Gürcan. Information (2019).

A generic testing framework for agent-based simulation models, Ö. Gürcan, O. Dikenelli, C. Bernon. Journal of Simulation. 2013.
[4] N. Lagaillardie, M. A. Djari, Ö. Gürcan (2019). A Computational Study on Fairness of the Tendermint Blockchain Protocol. Information.

Dissecting Tendermint, Y. Amoussou-Guenou, A. Del Pozzo, M. Potop-Butucaru, and S. Tucci-Piergiovanni. International Conference on Networked Systems (NETYS 2019), pp 166-182, 2019.

See also