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Programmatic NFTs

https://www.youtube.com/watch?v=G7Z5iNDtcs8

Description

Built in 36 hours for ETHParis 2023!

This projects aims to bring sponsorships to NFT owners with almost no gas fees, get liquidity to your project without taking on any risk.

How it works

To make NFTs more customisable, we can introduce a tokenURI() method to a ERC6551 account (derived from the original NFT), which simply transforms a URI to a URI. We also store some auxiliary data structures to keep track of Sponsorships, where each sponsorship has a specific Transformer address, which has its own transform(string memory uri) method.

tokenURI() method

The tokenURI() method takes the underlying NFT's tokenURI(uint256 tokenId) through all the active sponsorship's Transfoerm::transform(string memory uri) methods, and returns the final transformed URI.

Since the Transformer only has a transform(string memory uri) method, we can simply compose with infinitely such Transformers as necessary.

User Experience

With the help of Account Abstraction, we can use a simple Paymaster to create sponsorships for ERC6551 holders (e.g. Biconomy). These holders will then be able to allow / deny sponsorships without paying any gas fees up front (challenge here is to create the ERC6551 with Account Abstraction, e.g. Safe).

Additionally, we can use cross-chain protocols to help with creating sponsorships of ERC6551s on other chains, and pay it forward with similar mechanisms (e.g. Hyperlane).

Each TBA will have it's own Push group chat, with the aim of preserving / maintaining direction & vision of the underlying NFT. Tentative naming syntax would be tokenbound:{chainId}:{tokenId}:{tokenCollectionAddress}, similar to how ERC6551s are derived.

How it was built

  • foundry to build smart contracts
  • Next.js, React.js, TypeScript, tailwindcss, @shadcn/ui, wagmi for frontend
  • WalletConnect for wallet authentication
  • Airstack for querying ERC6551 TBA / owner data
  • (incomplete) Push protocol for notifications, communication between TBA holders & sponsors, past owners
  • (incomplete) Biconomy for Paymasters
  • (incomplete) Hyperlane with Queries API and inter-chain gas payments