What's difference between HIP404 and ERC404?

  1. ERC-404 is not a formal EIP standard. We aim to advance HIP404 as an official standard on HyperLiquid.

  2. HIP-404 is upgradeable contract, while ERC-404 does not.

  3. HIP-404 allows customization of units, meaning a single NFT can be redeemed for a specified amount of tokens, whereas ERC-404 sets the units to 10 ** decimals.

  4. HIP-404 supports transferring a specific NFT when transferring tokens, while ERC-404 transfers the last NFT acquired by the owner when transferring tokens, without allowing specification of a specific NFT.

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