# Writing NFT Spec

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The documentation is designed for Liker Land and LikeCoin v2. For information on [3ook.com](https://3ook.com/) and LikeCoin v3, please visit [docs.3ook.com](https://docs.3ook.com) and [dao.like.co](https://dao.like.co/).
{% endhint %}

## Background

The Writing NFT introduced by Liker Land is designed especially for a single piece of article or post. The idea is similar to the traditional book publishing flow as an analogy, but the solution, however, tackles some specific issues for a single piece of writing.

Read more about [Writing NFT here](https://blog.like.co/en/writing-nft-medium-for-textual-works-on-web3/)

## NFT Class metadata

Each writing NFT class represent a creative work registered on an ISCN. To allow easier search and collection of all Writing NFTs created by a same creator, nft\_meta\_collection fields would be used. A dynamic API is used as uri to provide dynamic metadata according to mint purchase status.

| key                                        | value                                                         | description                                    |
| ------------------------------------------ | ------------------------------------------------------------- | ---------------------------------------------- |
| name                                       | Writing NFT - {ISCN name}                                     | Name of ISCN prefix with Writing NFT           |
| symbol                                     | WRITING                                                       | `WRITING` is used as symbol                    |
| uri                                        | <https://api.like.co/likernft/metadata?iscn\\_id={iscn\\_id}> | Dynamic API from api.like.co, query by ISCN ID |
| metadata                                   |                                                               |                                                |
| metadata.nft\_meta\_collection\_id         | likerland\_writing\_nft                                       | ID of the Writing NFT meta collection          |
| metadata.nft\_meta\_collection\_name       | Writing NFT                                                   | Name of Writing NFT meta collection            |
| metadata.nft\_meta\_collection\_descrption | Writing NFT by Liker Land                                     | Description of Writing NFT                     |

## NFT Instance metadata

In Writing NFT, every instance of NFT in a same class should be homogeneous. A randomized ID is used to prevent user from distinguishing the minting order. A dynamic API is also used as image to provide dynamic image according to mint purchase status.

| key            | value                                                                           | description                                                |
| -------------- | ------------------------------------------------------------------------------- | ---------------------------------------------------------- |
| id             | writing-{uuid}                                                                  | Randomized uuid v4 prefixed with `writing`                 |
| uri            | <https://api.like.co/likernft/metadata?class\\_id={class\\_id}\\&nft\\_id={id}> | Dynamic API from api.like.co, query by class id and nft id |
| metadata       |                                                                                 |                                                            |
| metadata.name  | Writing NFT - {ISCN name}                                                       | ID of the Writing NFT meta collection                      |
| metadata.image | <https://api.like.co/likernft//image/class\\_${classId}.png>                    | Name of Writing NFT meta collection                        |

## Registering via api.like.co

To allow the display of Writing NFT on LikeCoin button/NFT widget and related api.like.co APIs, users should call the like.co NFT API to register their NFT after minting.

Please view [api.like.co documentation](https://api.like.co) for details


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