A platform for building DAOs

Usage no npm install needed!

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  import arcExperimental from '';


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Arc is the base layer of the DAO stack. It consists of a set of smart contracts deployed on the Ethereum blockchain that define the basic building blocks and standard components that can be used to implement any DAO.

Arc is a modular, upgradeable platform that allows for a rapid natural selection of governance systems.

Arc Structure Diagram

Figure 1: Arc's structure

Every box in Figure 1 represents a smart contract.

The Token contract probably does not require an explanation, being the most popular use-case of the Ethereum network.

The Avatar contract is the face of an organization on the blockchain, e.g. if the organization is to hold ownership of anything, like ownership over a contract or asset, the owner address will be the Avatar.

The Reputation contract stores a DAO's reputation data. In Arc, Reputation represents a user's decision power in a given DAO. It is very similar to a token, with two main differences: one, it is non-transferable, and two, it can be granted or taken away by the DAO.

On the right side of the figure we have the schemes. Schemes are simple pieces of logic describing the different actions a DAO can take. One example is a scheme for funding proposals, in which everyone can suggest and vote on proposals, and if a proposal is approved, it is automatically funded.

At the bottom are the global constraints. Global constraints prevent current and future modules from breaking certain overarching rules, e.g. a cap on an organization’s total possible reputation.

The Controller is an access control module that keeps a record of all the registered schemes in a DAO and the permissions for each scheme. It also records all global constraints and enforces them by reverting transactions that violate them.

Go here for a full primer on Arc.


DAOstack Arc is still in its alpha version. Arc is intended to provide secure, tested, and community-audited code, but please use common sense when doing anything that deals with real money! We take no responsibility for your implementation decisions and any security problem you might experience.

Getting Started

  1. Please install Truffle and initialize your project with truffle init.
    npm install -g truffle
    mkdir myproject && cd myproject
    truffle init
  2. Install the @daostack/arc package: npm install @daostack/arc.
    • .sol Source code is found under node_modules/@daostack/arc/contracts
    • .json Compiled contracts are found under node_modules/@daostack/arc/build/contracts
  3. Import in your project:
    import '@daostack/arc/contracts/universalSchemes/UniversalScheme.sol';
    contract MyContract is UniversalScheme {
    You should be able to find the @daostack/arc contracts (.json) already built and ready for deployment in the node_modules/@daostack/arc/build/contracts/ folder.
  4. Read the documentation to get a better understanding of how to use Arc.


PRs are welcome, but please first consult with the Contribution guide.

Join us on Discord!

To contribute to Arc development start by cloning the repo and installing the dependencies:

git clone
cd arc
npm install


Available commands while developing:

  • npm run build - Compile all contracts to the build/ folder.
  • npm run test - This will run ganache-cli, compile, migrate and run all tests.
  • npm run lint - Check all JavaScript code for style & good practices.
  • npm run solhint - Check all Solidity code for style & good practices.
  • npm run docs:<update|build|deploy|preview> - See this for details.


Arc has a prebuilt Docker image that makes development environments consistent and cross-platform. To start developing inside this environment:

  1. Install Docker in your favorite OS/platform.
  2. Run docker run --rm -it -v <path to repo>:/home/arc daostack/arc (*May require Admin/root permissions).
  3. The container will automatically git clone or git fetch depending on if <path to repo> is empty, and will install any dependencies.
  4. Continue development inside the container.


This is an open-source project (GPL license).