Diamond Foundry

Welcome to the Diamond Foundry project! This repository introduces a robust system that simplifies smart contract management using the EIP2535 Diamond Proxy Standard, a specification for an upgradable smart contract on Ethereum blockchain.

The primary goal is to build a versatile and reusable library of smart contract facets and an automated Diamond Factory. This system offers a solution to common challenges associated with smart contract development and deployment, such as complexity and the requirement for skilled engineers and auditors.

Please note that the project is still a work in progress. While we strive for accuracy, the software is provided "as is", and users are urged to use it with discretion as it's not yet stable for production environments.

Features

1. Facet Registry and Diamond Factory.
2. Linting, Build, Test & Slither in CI. Deployment of artifacts to be added.
3. Multi address delegate call and Facets containing built-in initializers.
4. DiamondCutFacet and DiamondLoupeFacet implementation.
5. Simple OwnableFacet and Ownable2StepFacet with pending owner functionality.
6. NFTOwnershipFacet, where ownership is attributed to a NFT.
7. AccessControlFacet, optimized access control with 256 roles.

Installation

This is a project fully built with foundry. If you are new to foundry, please check the installation instructions.

Also, pnpm is used as a default package manager, so please follow these instructions for installation.

For guidance on how to integrate a Foundry project in VSCode, please refer to this guide.

Set Up

git clone https://github.com/Forgenie/diamond-foundry.git
cd diamond-foundry
pnpm install

Usage

This is a list of the most frequently needed commands.

Note: You need to have foundry installed in order to work with the contracts.

Compile

Compile the contracts:

$ forge build

Clean

Delete the build artifacts and cache directories:

$ forge clean

Coverage

Get a test coverage report:

$ forge coverage

Gas Usage

Get a gas report:

$ forge test --gas-report

Lint

Lint the contracts:

$ pnpm lint

Test

Run the tests:

$ forge test

Contributing

We invite community members to contribute to the project by reviewing code, detecting bugs, developing new Facets, and extending functionality.

Open up and review a PR, discussion or issue, and provide feedback by clearly explaining the changes and the motivation behind.

Guidelines

1. Adding facets

• Use diamond storage Layout pattern for storing variables in file named <FacetName>Storage.
• Define internal behavior, interact with storage in the <FacetName>Base abstract contract.
• Compose initializer and protect external calls in <FacetName>Facet contract.
• I<FacetName> for interface of external functions, and I<FacetName>Base for errors, structs, enums, and events.

2. Testing

• Build helper contract named <FacetName>Helper for getting facet's selectors, initalizer and supported interfaces.
• Attach facet interface to a diamond's address in the setUp of an abstract <FacetName>FacetTest contract. Override diamondInitParams() to initialize diamond with tested facet or others if needed.
• Reuse I<Facet>Base interface for accessing internal structs, errors, events or enums.
• Test facets by attaching their interface to a diamond address.
• There is one Test contract per each function within a Facet. It's naming should follow the <Contract>_<method> rule, so that we can isolate it with --match-contract <REGEX>.

License

MIT License (c) 2023 Forgenie Labs

Acknowledgements

Nick Mudge @mudgen diamond-hardhat
Paul Razvan Berg @PaulRBerg foundry-template
OpenZeppelin @OpenZeppelin openzeppelin-contracts