This repository contains the code base for a modular smart contract system, which is built as a modified version of the “Diamond” ERC-2535 multi-facet proxy contract. With this interface standard, smart contracts ("Diamonds") can be assembled from existing functionality components ("Facets") as individually required. This enables composability and continuous upgradeability for developers.

• Upgradability
• On-chain deployment
• Dynamic interface detection
• ERC-20 - Fungible Tokens
• ERC-721 - Non-Fungible Tokens
• ERC-1155 - Semi-Fungible Tokens
• ERC-5114 - Soulbound Badges
• ERC-2981 - Royalties
• ERC-4675 - Multi-Fractional NFTs

The main smart contract aka. the diamond:

• src/diamond

Functional extensions for diamonds aka. the facets:

• src/facets

  Configurability and upgradability:

  • src/facets/upgradability

  Catalog of supported token standards:

  • src/facets/token

    ERC-1155:

    • src/facets/token/erc1155

    ERC-20:

    • src/facets/token/erc20

    ERC-5114:

    • src/facets/token/erc5114

    ERC-721:

    • src/facets/token/erc721

  Single metadata facet for all token standards:

  • src/facets/metadata