Non-fungible tokens (NFT)



    NFTs are currently taking the digital art and collectibles world by storm. Digital artists are seeing their lives change thanks to huge sales to a new crypto-audience. And celebrities are joining in as they spot a new opportunity to connect with fans. But digital art is only one way to use NFTs. Really they can be used to represent ownership of any unique asset, like a deed for an item in the digital or physical realm.

    If Andy Warhol had been born in the late 90s, he probably would have minted Campbell’s Soup as an NFT. It’s only a matter of time before Kanye puts a run of Yeezys on Ethereum. And one day owning your car might be proved with an NFT.

    What’s an NFT?

    NFTs are tokens that we can use to represent ownership of unique items. They let us tokenise things like art, collectibles, even real estate. They can only have one official owner at a time and they’re secured by the Ethereum blockchain – no one can modify the record of ownership or copy/paste a new NFT into existence.

    NFT stands for non-fungible token. Non-fungible is an economic term that you could use to describe things like your furniture, a song file, or your computer. These things are not interchangeable for other items because they have unique properties.

    Fungible items, on the other hand, can be exchanged because their value defines them rather than their unique properties. For example, ETH or dollars are fungible because 1 ETH / $1 USD is exchangeable for another 1 ETH / $1 USD.

    The internet of assets

    NFTs and Ethereum solve some of the problems that exist in the internet today. As everything becomes more digital, there’s a need to replicate the properties of physical items like scarcity, uniqueness, and proof of ownership. Not to mention that digital items often only work in the context of their product. For example you can’t re-sell an iTunes mp3 you’ve purchased, or you can’t exchange one company’s loyalty points for another platform’s credit even if there’s a market for it.

    Here’s how an internet of NFTs compared to the internet most of us use today looks…

    A comparison

    An NFT internet The internet today
    NFTs are digitally unique, no two NFTs are the same. A copy of a file, like an .mp3 or .jpg, is the same as the original.
    Every NFT must have an owner and this is of public record and easy for anyone to verify. Ownership records of digital items are stored on servers controlled by institutions – you must take their word for it.
    NFTs are compatible with anything built using Ethereum. An NFT ticket for an event can be traded on every Ethereum marketplace, for an entirely different NFT. You could trade a piece of art for a ticket! Companies with digital items must build their own infrastructure. For example an app that issues digital tickets for events would have to build their own ticket exchange.
    Content creators can sell their work anywhere and can access a global market. Creators rely on the infrastructure and distribution of the platforms they use. These are often subject to terms of use and geographical restrictions.
    Creators can retain ownership rights over their own work, and claim resale royalties directly. Platforms, such as music streaming services, retain the majority of profits from sales.
    Items can be used in surprising ways. For example, you can use digital artwork as collateral in a decentralised loan.

    NFT examples

    The NFT world is relatively new. In theory, the scope for NFTs is anything that is unique that needs provable ownership. Here are some examples of NFTs that exist today, to help you get the idea: examples

    We use NFTs to give back to our contributors and we’ve even got our own NFT domain name.

    If you contribute to, you can claim a POAP NFT. These are collectibles that prove you participated in an event. Some crypto meetups have used POAPs as a form of ticket to their events. More on contributing. POAP

    This website has an alternative domain name powered by NFTs, ethereum.eth. Our .org address is centrally managed by a domain name system (DNS) provider, whereas ethereum.eth is registered on Ethereum via the Ethereum Name Service (ENS). And its owned and managed by us. Check our ENS record

    More on ENS

    How do NFTs work?

    NFTs are different from ERC-20 tokens, such as DAI or LINK, in that each individual token is completely unique and is not divisible. NFTs give the ability to assign or claim ownership of any unique piece of digital data, trackable by using Ethereum’s blockchain as a public ledger. An NFT is minted from digital objects as a representation of digital or non-digital assets. For example, an NFT could represent:

    • Digital Art:
      • GIFs
      • Collectibles
      • Music
      • Videos
    • Real World Items:
      • Deeds to a car
      • Tickets to a real world event
      • Tokenized invoices
      • Legal documents
      • Signatures
    • Lots and lots more options to get creative with!

    An NFT can only have one owner at a time. Ownership is managed through the uniqueID and metadata that no other token can replicate. NFTs are minted through smart contracts that assign ownership and manage the transferability of the NFT’s. When someone creates or mints an NFT, they execute code stored in smart contracts that conform to different standards, such as ERC-721. This information is added to the blockchain where the NFT is being managed. The minting process, from a high level, has the following steps that it goes through:

    • Creating a new block
    • Validating information
    • Recording information into the blockchain

    NFT’s have some special properties:

    • Each token minted has a unique identifier that is directly linked to one Ethereum address.
    • They’re not directly interchangeable with other tokens 1:1. For example 1 ETH is exactly the same as another ETH. This isn’t the case with NFTs.
    • Each token has an owner and this information is easily verifiable.
    • They live on Ethereum and can be bought and sold on any Ethereum-based NFT market.

    In other words, if you own an NFT:

    • You can easily prove you own it.
      • Proving you own an NFT is very similar to proving you have ETH in your account.
      • For…