# FAQ

**Why does it matter if I sell as an NFT(ERC721) or as a Token(ERC20)?**

Transacting your Anomalies NFT and $ASTX are the same thing, the matter of consideration is whether the NFT with a certain rarity you wish to keep is locked and not burned.

Holders are advised to separate tokens meant for trading and NFTs meant for keeping via dedicated wallets. 

Metadata/Rarity will not be lost when traded on a NFT marketplace such as Blur or Opensea. In other words trading on such platforms means you won't accidentally lose the NFT that you wish to keep.

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**Why is the price of a NFT and $ASTX  not the same?**

Note that price differences between platforms are due to various factors such as, but not limited to, depth of liquidity, minimum transaction value which is 1 $ASTX for all NFT transactions and the differing platform fees. NFTs may also be prices higher due to rarity traits.

**How does DN404 optimize gas?**

DN404 optimizes gas via a method called 'Storage Packing', which packs multiple variables into the same storage slot.

**How do I make sure I don't sell a specific NFT if I have multiple $ASTX?**

To prevent the Anomalies you wish to keep from being accidently sold when you have multiple tokens, it is best to move them to a separate wallet by transferring them to a new wallet as a ERC721 token as opposed to ERC20. 

**Why is the floor price of an Anomalies NFT the price of 1 $ASTX?**

The floor price of an Asterix Anomalies NFT can be considered to be the price of 1 $ASTX because you can instantly sell the Anomalies NFT via a DEX as an $ASTX(ERC20) token.

**Has DN404 been submitted for EIP approval?**

Yes.

**What happens to the NFT if you make transfers via ERC20?**

Any movement of the ERC-20 tokens triggers the mint/burn of NFTs. If you have 1 $ASTX and you send 0.5 $ASTX elsewhere, your NFT is burned. If you later acquire another 0.5 $ASTX, a new NFT will be minted to your wallet.

At the same time, if 1 ERC20 token is transferred to another wallet, the NFT tied to that ERC20 token will get burned and re-minted. In order to ensure the NFT is preserved, conduct transfers via ERC721.

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**Which NFT gets burned and which NFT gets minted?**

NFTs are burned from your wallet last-in-first-out. NFTs are minted according to the specific DN404 contract logic.

<figure><img src="https://2825793007-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FDZB43mxq1FbDLIm2KsOm%2Fuploads%2FcQHJjObIC1yQwwI3JuwA%2Fas1%20copy%20(3).png?alt=media&#x26;token=ac9829a6-a9aa-4932-a659-9851ff4dfeb2" alt="" width="188"><figcaption></figcaption></figure>