ERC-4907 Reference Implementation

• Standard document: EIP-4907: Rental NFT, ERC-721 User And Expires Extension.
• Compatible with Foundry

Why use this implementation?

• The included reference implementation over at ethereum/EIPs is full of trailing white space and inconsistent formatting. This one isn't.
• Original reference implementation isn't compatible to be neatly imported through foundry: This repository is compabible.

License

As it's really just a neatly formatted and repackaged version of the original reference implementation, we're using the same license: SPDX-License-Identifier: CC0-1.0