Putty contest - codetilda's results

Computed constants in the contract PuttyV2.sol

Source repo: https://github.com/code-423n4/2022-06-putty/blob/main/contracts/src/PuttyV2.sol

Instead of

/* ~~~ STATE VARIABLES ~~~ */

/**
    @dev ERC721Asset type hash used for EIP-712 encoding.
 */
bytes32 public constant ERC721ASSET_TYPE_HASH =
    keccak256(abi.encodePacked("ERC721Asset(address token,uint256 tokenId)"));

/**
    @dev ERC20Asset type hash used for EIP-712 encoding.
 */
bytes32 public constant ERC20ASSET_TYPE_HASH =
    keccak256(abi.encodePacked("ERC20Asset(address token,uint256 tokenAmount)"));

/**
    @dev ERC721Asset type hash used for EIP-712 encoding.
 */
bytes32 public constant ORDER_TYPE_HASH =
    keccak256(
        abi.encodePacked(
            "Order(",
            "address maker,",
            "bool isCall,",
            "bool isLong,",
            "address baseAsset,",
            "uint256 strike,",
            "uint256 premium,",
            "uint256 duration,",
            "uint256 expiration,",
            "uint256 nonce,",
            "address[] whitelist,",
            "address[] floorTokens,",
            "ERC20Asset[] erc20Assets,",
            "ERC721Asset[] erc721Assets",
            ")",
            "ERC20Asset(address token,uint256 tokenAmount)",
            "ERC721Asset(address token,uint256 tokenId)"
        )
    );

we can write directly this values:

/* ~~~ STATE VARIABLES ~~~ */

/**
    @dev ERC721Asset type hash used for EIP-712 encoding.
 */
bytes32 public constant ERC721ASSET_TYPE_HASH = 0x768c1d2c3157c9ca752098be2da2da3e1ddae5a69ca4394b1f83e1179407e8f0;

/**
    @dev ERC20Asset type hash used for EIP-712 encoding.
 */
bytes32 public constant ERC20ASSET_TYPE_HASH = 0xa55d25ac87b1c0e125b844871149c64ce5636cae2bb0ed2f2eb4990df479cd91;

/**
    @dev ERC721Asset type hash used for EIP-712 encoding.
 */
bytes32 public constant ORDER_TYPE_HASH = 0x331cf33dce9314036c50f72ada91444e078be32f06bf1d891362de01ac1a8d66;