ERC721 Stylus

Implementation of ERC721 in Rust for Arbitrum's Stylus. Most of the code is based off of the example here, however there are several differences:

Fixed balances bug in the transfer function
Fixed receiver check for safeMint and safeTransfer
Optimized mint function to be more gas efficient
Optimized safeMint function to be more gas efficient
mint(address) has been changed to mint(address, tokenId). Same goes for safeMint.
totalSupply was removed from the base implementation
supportsInterface returns true for IERC721Metadata
tokenUri() has been renamed to tokenUR() to match the ERC721 spec
Changed internal burn() function to only require a tokenId
Refactored code to match the latest Stylus SDK

Running the code

To get the contract abi, you can run:

cargo stylus export-abi

To deploy the code you can run (this will use the default Stylus RPC):

cargo stylus deploy --private-key=<PRIVATE_KEY>

You can interact with Stylus contracts as you would any other contract using the exported ABI.

More info on Stylus can be found here.