> For the complete documentation index, see [llms.txt](https://gutdem.gitbook.io/gutdem/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gutdem.gitbook.io/gutdem/gutdem-tech/erc-404-nerd-manual.md).

# ERC-404 nerd manual

Token ERC-404 is a combination of an NFT + ERC-20: 

* 1 NFT is minted in the wallet if it holds enough ERC-20
* 1 NFT is burned in the wallet if ERC-20 is sold.

1. Hold 10,000 ERC-20 to get 1 NFT
2. Sell some ERC-20, so you have <10 000, and your NFT is burned
3. Buyback, so you have at least 10,000 ERC-20 - the NFT is minted again in your wallet

<figure><img src="https://2230049731-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FChF2cC8UbWLrQaf6EUJt%2Fuploads%2FRg3s4ASD21BZahQD7ihP%2F404%20explainer.jpg?alt=media&amp;token=9b73f071-3114-48d4-bd00-d171dab489a4" alt=""><figcaption></figcaption></figure>