Get NFTs by collection address and owner

Question

I'm trying to get all the NFTs in a collection that a wallet owns, but I only achieved get all the NFTs of a collection, or all the NFTs of a wallet (multi collections).

import { useConnection, useWallet } from "@solana/wallet-adapter-react"
import { Metaplex, walletAdapterIdentity } from "@metaplex-foundation/js"

...

const walletAdapter = useWallet()
const { connection } = useConnection()
const metaplex = Metaplex.make(connection).use(walletAdapterIdentity(walletAdapter))

// Get all NFTs of my collection
const candyMachine = await metaplex
   .candyMachinesV2()
   .findByAddress({ address: new PublicKey(candyMachineAddress) })

// Get all NFTs of wallet (My collection and others)
const walletNFTs = await metaplex
   .nfts()
   .findAllByOwner({ owner: wallet.publicKey })

Is this filter possible? I was exploring Metaplex SDK, but I didn't find this type of filter.

Thanks!

Answer 1

Try filtering for a collection address, something like the following

   // using metaplex SDK to fetch all NFTs of connected wallet
    const nfts = await metaplex
      .nfts()
      .findAllByOwner({ owner: wallet.publicKey })
     

    // filter for nfts in "collection"
    let nft = []
    for (let i = 0; i < nfts.length; i++) {
      if (nfts[i].collection?.address.toString() == collectionAddress.toString()) {
        nft.push(nfts[i])
      }
    }

Answer 2

This returns an array of Metadata object that has a collection field. You can filter the NFTs that match the collection you're looking for.

const walletNFTs = await metaplex
   .nfts()
   .findAllByOwner({ owner: wallet.publicKey })