# Dual Nature Token Pairs (404 Projects) *Cojoined ERC-20 and ERC-721* By [Dreamers Sleep](https://paragraph.com/@dreamerssleep) · 2024-04-11 dn404, erc404 --- Goal ==== The main goal of this post is to list some of the -404 based projects that exist and provide some basic info and resources on what -404 projects are. What are Dual Nature Token Pairs (-404 Projects)? ================================================= Dual Nature Token Pairs are projects typically ending in -404. They use an experimental token standard that combines ERC-20 (fungible tokens) and ERC-721 (non-fungible tokens), allowing tokens under this standard to be both fungible and non-fungible at the same time. This works by bonding an ERC-721 token to an ERC-20 token, where an ERC-20 token only represents an NFT when it is a whole token. Once it is broken down into fractions for trading as an ERC-20 token, the NFT is burnt. When two complementary fractions (e.g. 0.4 and 0.6) are combined to form a full token, a new NFT is minted. Typically, there are a set number of NFTs with associated metadata, and the NFTs that are burned and minted from the above actions are cycled in and out of this pool. So in effect, you are not minting a "new" NFT, you are drawing an existing one from a pool. To date there have been a variety of unofficial standards developed, however there is an official ERC submission, aimed to standardize this pairing, which states the following: "_A fungible ERC-20 token contract and non-fungible ERC-721 token contract can be interlinked, allowing actions performed on one contract to be reflected on the other. This proposal defines how the relationship between the two token contracts can be queried. It also enables accounts to configure if ERC-721 mints and transfers are skipped during ERC-20 to ERC-721 synchronization._" Useful resources ---------------- Official ERC-404: [https://eips.ethereum.org/EIPS/eip-7631](https://eips.ethereum.org/EIPS/eip-7631), [https://ethereum-magicians.org/t/erc-7631-dual-nature-token-pair/18796](https://ethereum-magicians.org/t/erc-7631-dual-nature-token-pair/18796) Great video by the talented [https://x.com/jenndefer](https://x.com/jenndefer) [![User Avatar](https://storage.googleapis.com/papyrus_images/3362b476e58617050d1c1d64d5948746.jpg)](https://twitter.com/jenndefer) [Jenn](https://twitter.com/jenndefer) [@jenndefer](https://twitter.com/jenndefer) [![Twitter Logo](https://paragraph.xyz/editor/twitter/logo.png)](https://twitter.com/jenndefer/status/1783902710032699887) Seeing a lot of 404s on the timeline ![👀](https://twemoji.maxcdn.com/v/14.0.2/72x72/1f440.png) If ur wondering WTF is this, here’s a lil vid that I put out when they first came out. Might be time to do an update as we’ve seen iterations on the standard w/ projects like [@udw\_gg](https://twitter.com/udw_gg) & [@asterixlabs](https://twitter.com/asterixlabs) ![🎥](https://twemoji.maxcdn.com/v/14.0.2/72x72/1f3a5.png)![🔜](https://twemoji.maxcdn.com/v/14.0.2/72x72/1f51c.png) ![](https://pbs.twimg.com/ext_tw_video_thumb/1756457776459677696/pu/img/FAxCO2mLyBd4H4la.jpg) [![Like Icon](https://paragraph.xyz/editor/twitter/heart.png) 300](https://twitter.com/jenndefer/status/1783902710032699887)[ 9:55 • 26 Apr 2024 ](https://twitter.com/jenndefer/status/1783902710032699887) In depth guide to ERC-404: [https://beincrypto.com/learn/erc-404-tokens-guide/](https://beincrypto.com/learn/erc-404-tokens-guide/) Coingecko ERC-404 guide: [https://www.coingecko.com/learn/erc-404-token-standard](https://www.coingecko.com/learn/erc-404-token-standard) Coingecko ERC-404 token list: [https://www.coingecko.com/en/categories/erc-404](https://www.coingecko.com/en/categories/erc-404) Excellent twitter thread: [![User Avatar](https://storage.googleapis.com/papyrus_images/2afa817205f16f9cf18d004578ffb924.jpg)](https://twitter.com/fridgeintheopen) [openthefridge](https://twitter.com/fridgeintheopen) [@fridgeintheopen](https://twitter.com/fridgeintheopen) [![Twitter Logo](https://paragraph.xyz/editor/twitter/logo.png)](https://twitter.com/fridgeintheopen/status/1777714360527487299) Cold Dives: A technical breakdown on DN 404, a hybrid ERC 20/721 token: ![](https://storage.googleapis.com/papyrus_images/de1faf5a101d734c5ef8022f4277f1e3.jpg) [![Like Icon](https://paragraph.xyz/editor/twitter/heart.png) 137](https://twitter.com/fridgeintheopen/status/1777714360527487299)[ 8:05 • 9 Apr 2024 ](https://twitter.com/fridgeintheopen/status/1777714360527487299) Incomplete List of Projects =========================== ![](https://storage.googleapis.com/papyrus_images/f79eeef0e335eeb5b4ff09c18787e0cd.png) Asterix Anomaly Launchpad ### Asterix By far and away the leader in the space. Amazing team (also leading the development of the official ERC-404 standard). Building rich partnerships. Amassing a large, multi-asset treasury. Integrating a DN404 launchpad and incubator powered by NFT staking. Running frequent puzzle based contests. NFT Supply: 10,000 Token Supply: 10,000 Tokens per NFT: 1 Chain: Ethereum Links: [https://side.xyz/asterix](https://side.xyz/asterix) Farcaster (unofficial): [https://warpcast.com/~/channel/asterix](https://warpcast.com/~/channel/asterix) * * * ![](https://storage.googleapis.com/papyrus_images/b4e00658e130edab5543a8480ec201d2.png) Chiblings ### Chiblings Chiblings, the underdogs, Wassies best friends and the cutest 404 so far! "an NFT is a combination of artwork and a cryptocurrency. A bastardised hybrid of the two, if you would." -loomdart Link to @loomdarts vision tweet: [![User Avatar](https://storage.googleapis.com/papyrus_images/9cc05e4e94b66ea3858e908687ebb350.jpg)](https://twitter.com/loomdart) [loomdart - Holy War Arc](https://twitter.com/loomdart) [@loomdart](https://twitter.com/loomdart) [![Twitter Logo](https://paragraph.xyz/editor/twitter/logo.png)](https://twitter.com/loomdart/status/1761414743653302682) The Ultimate NFT Project: Bit of a pre-ramble here but eh. There are currently very few NFT collections that are easy for NFT traders/flippers to compartmentalize/understand rarity distributions of. Now, why should we care about these guys? Well, because if the people… [![Like Icon](https://paragraph.xyz/editor/twitter/heart.png) 257](https://twitter.com/loomdart/status/1761414743653302682)[ 8:36 • 24 Feb 2024 ](https://twitter.com/loomdart/status/1761414743653302682) NFT Supply: 6,986 Token Supply: 69,860 Tokens per NFT: 10 Chain: Ethereum Farcaster: [https://warpcast.com/~/channel/chiblings](https://warpcast.com/~/channel/chiblings) Twitter Profile: [https://x.com/realchiblings](https://x.com/realchiblings) CoinGecko: [https://www.coingecko.com/en/nft/chiblings](https://www.coingecko.com/en/nft/chiblings) NFT: [https://blur.io/collection/chiblings](https://blur.io/collection/chiblings) Trade on Uniswap. $Chib contract address: 0x7068263EDa099fB93BB3215c05e728c0b54b3137 * * * ![](https://storage.googleapis.com/papyrus_images/edb0eaec9aa952983c5b7f342101e1c8.png) ### Pandora Pandora is the **inaugural project to utilize ERC-404 tokens**. It uniquely combines NFT boxes in various colors with the PANDORA token itself. NFT Supply: 10,000 Token Supply: 10,000 Tokens per NFT: 1 Chain: Ethereum Website: [https://www.pandora.build/](https://www.pandora.build/) CoinGecko: [https://www.coingecko.com/en/coins/pandora](https://www.coingecko.com/en/coins/pandora) Magic Eden: [https://magiceden.io/collections/ethereum/0x9e9fbde7c7a83c43913bddc8779158f1368f0413](https://magiceden.io/collections/ethereum/0x9e9fbde7c7a83c43913bddc8779158f1368f0413) * * * ![](https://storage.googleapis.com/papyrus_images/90ec1d17939f5513b2d1b141acdb736d.png) ### Bonsai The $DEGEN of the Lens ecosystem has opted for a DN404 token model. This token was airdropped to active LENS users, and is available for tipping on their social apps now. There will be 3 airdrops to users over the course of its first year. NFT Supply: 10,000 Token Supply: 1,000,000,000 Tokens per NFT: 100,000 Chain: Polygon [http://www.bonsai.meme](http://www.bonsai.meme) [https://www.coingecko.com/en/coins/bonsai-token](https://www.coingecko.com/en/coins/bonsai-token) [https://opensea.io/collection/bonsai-token](https://opensea.io/collection/bonsai-token) * * * ![](https://storage.googleapis.com/papyrus_images/cbc29a2c97c2dfc821a34fbc76d5d473.png) The Velocity Series, hosted by Bybit and Oracle Red Bull Racing, offers a cool web3 experience with digital art inspired by F1 racing. The Velocity Pass 2.0 gives exclusive access to NFT artwork, surprises, and prize raffles. You can get it in a Dutch auction or through airdrops if you're an OG Velocity Pass holder. Plus, the new DN-404 standard lets you own a fraction of a pass. Website: [https://www.bybit.com/en/promo/nft-events/velocity-pass-V2](https://www.bybit.com/en/promo/nft-events/velocity-pass-V2) Magic Eden: [https://magiceden.io/collections/ethereum/0x494af9361f098de517e2a8591a566e642e23479d?activeTab=items](https://magiceden.io/collections/ethereum/0x494af9361f098de517e2a8591a566e642e23479d?activeTab=items) ERC20 Contract: [https://etherscan.io/token/0x1c72523eecade307c9bffd03953ff91c5b80be09](https://etherscan.io/token/0x1c72523eecade307c9bffd03953ff91c5b80be09) Please comment any info I am missing: Exciting DN404 projects, details, figures, hot takes etc. --- *Originally published on [Dreamers Sleep](https://paragraph.com/@dreamerssleep/dualnature404projects)*