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Minimal Anti-Collusion Infrastructure

CI License

Minimal Anti-Collusion Infrastructure (MACI) is an on-chain voting protocol which protects privacy and minimizes the risk of collusion and bribery.

MACI blog, resources, and documentation for developers and integrators can be found here:

We welcome contributions to this project. Please join our Discord server (in the #🗳️-maci channel) to discuss.


Below you can find a list of the packages included in this repository.

package npm tests
maci-circuits NPM Package Actions Status
maci-cli NPM Package Actions Status
maci-contracts NPM Package Actions Status
maci-core NPM Package Actions Status
maci-crypto NPM Package Actions Status
maci-domainobjs NPM Package Actions Status
maci-integrationTests NPM Package Actions Status

Development and testing


The base branch of the project is dev, which is used for ongoing development.

This project uses tags for releases. View all MACI releases.

To contribute to MACI, create feature/fix branches, then open PRs into dev. Learn more about contributing.

Local development

For installation and local development instructions, please see our installation docs.

This repository is organized as Lerna submodules. Each submodule contains its own unit tests.

  • crypto: low-level cryptographic operations.
  • circuits: zk-SNARK circuits.
  • contracts: Solidity contracts and deployment code.
  • domainobjs: Classes which represent high-level domain objects particular to this project.
  • core: Business logic functions for message processing, vote tallying, and circuit input generation through MaciState, a state machine abstraction.
  • cli: A command-line interface with which one can deploy and interact with an instance of MACI.
  • integrationTests: Integration tests which use the command-line interface to perform end-to-end tests.


Please refer to the testing documentation for more information.

CI pipeline

CI pipeline ensures that we have automated tests that constantly validate. For more information about pipeline workflows, read our CI documentation.