Core - Verified Collections

What are Collections?

Collections are a group of Assets that belong together, part of the same series, or group. In order to group Assets together, we must first create a Collection Asset whose purpose is to store any metadata related to that collection such as collection name and collection image. The Collection Asset acts as a front cover to your collection and can also store collection wide plugins.

The data that is stored and accessible from the Collection Asset is as follows;

Accounts	Description
key	The account key discriminator
updateAuthority	The authority of the new asset.
name	The collection name.
uri	The uri to the collections off-chain metadata.
num minted	The number of assets minted in the collection.
current size	The number of assets currently in the collection.

Creating a Collection

To create a Core Collection you can use the CreateCollection instruction like this:

Creating a Simple Collection

The following snippet creates a simple collection without Plugins or anything special.

Create a MPL Core Collection

import { generateSigner } from '@metaplex-foundation/umi'
import { createCollection } from '@metaplex-foundation/mpl-core'

const collectionSigner = generateSigner(umi)

await createCollection(umi, {
  collection: collectionSigner,
  name: 'My Collection',
  uri: 'https://example.com/my-collection.json',
})

Creating a Collection with Plugins

The following snippet creates a collection with the Royalties Plugin attached. You can attach additional plugins as described here.

Create a MPL Core Collection with Plugin

import { generateSigner, publicKey } from '@metaplex-foundation/umi'
import { createCollection, ruleSet } from '@metaplex-foundation/core'

const collectionSigner = generateSigner(umi)

const creator1 = publicKey('11111111111111111111111111111111')
const creator2 = publicKey('22222222222222222222222222222222')

await createCollection(umi, {
  collection: collectionSigner,
  name: 'My NFT',
  uri: 'https://example.com/my-nft.json',
  plugins: [
    {
      type: 'Royalties',
      basisPoints: 500,
      creators: [
        {
          address: creator1,
          percentage: 20,
        },
        {
          address: creator2,
          percentage: 80,
        },
      ],
      ruleSet: ruleSet('None'), // Compatibility rule set
    },
  ],
}).sendAndConfirm(umi)

Fetch a Collection

To fetch a collection the following function can be used:

Fetch a collection

import { fetchCollectionV1 } from '@metaplex-foundation/mpl-core'
import { publicKey } from '@metaplex-foundation/umi'

const collectionId = publicKey('11111111111111111111111111111111')

const collection = await fetchCollection(umi, collectionId)

console.log(collection)

Updating a Collection

To update the data of a Core Collection use the UpdateCollection instruction. For example, you use this instruction to change the name of a collection.

Updating a Collection

import { publicKey } from '@metaplex-foundation/umi'
import { updateCollection } from '@metaplex-foundation/mpl-core'

const collectionAddress = publicKey('1111111111111111111111111111111')

await updateCollection(umi, {
  collection: collectionAddress,
  name: 'my-nft',
  uri: 'https://exmaple.com/new-uri',
}).sendAndConfirm(umi)

Updating a Collection Plugin

If you want to change the behaviour of a plugin that is attached to a Core Collection you may want to use the updateCollectionPlugin instruction.

Updating a Collection Plugin

import { publicKey } from '@metaplex-foundation/umi'
import { updateCollectionPlugin, ruleSet } from '@metaplex-foundation/mpl-core'

const collectionAddress = publicKey('1111111111111111111111111111111')

const newCreator = publicKey('5555555555555555555555555555555')

await updateCollectionPlugin(umi, {
  collection: collectionAddress,
  plugin: {
    type: 'Royalties',
    basisPoints: 400,
    creators: [{ address: newCreator, percentage: 100 }],
    ruleSet: ruleSet('None'),
  },
}).sendAndConfirm(umi)