solana-program-examples/compression/cnft-burn/tests/fetchNFTsByCollection.ts

/**
 * Demonstrate the use of a few of the Metaplex Read API methods,
 * (needed to fetch compressed NFTs)
 */

// imports from other libraries
import { PublicKey } from "@solana/web3.js";
// import custom helpers for demos
import { printConsoleSeparator } from "./utils/helpers";

// local import of the connection wrapper, to help with using the ReadApi
import { WrapperConnection } from "./ReadApi/WrapperConnection";
import { RPC_PATH } from "./cnft-burn";

export async function getcNFTsFromCollection(
  collectionMint: PublicKey,
  owner: string
) {
  // load the stored PublicKeys for ease of use
  // let keys = loadPublicKeysFromFile();

  // ensure the primary script was already run
  // if (!keys?.collectionMint)
  //   return console.warn("No local keys were found, specifically `collectionMint`");

  // convert the locally saved keys to PublicKeys
  // const collectionMint: PublicKey = keys.collectionMint;

  console.log("Collection mint:", collectionMint.toBase58());

  //////////////////////////////////////////////////////////////////////////////
  //////////////////////////////////////////////////////////////////////////////

  // load the env variables and store the cluster RPC url
  const CLUSTER_URL = RPC_PATH;

  // create a new rpc connection, using the ReadApi wrapper
  const connection = new WrapperConnection(CLUSTER_URL);

  printConsoleSeparator("Getting all assets by the 'collection' group...");

  const assets = await connection
    .getAssetsByGroup({
      groupKey: "collection",
      groupValue: collectionMint.toBase58(),
      sortBy: {
        sortBy: "recent_action",
        sortDirection: "asc",
      },
    })
    .then((res) => {
      console.log("Total assets returned:", res.total);

      // loop over each of the asset items in the collection
      const assetsIds = res.items?.map((asset) => {
        // display a spacer between each of the assets
        console.log("\n===============================================");

        // print the entire asset record to the console
        // console.log(asset);

        // print some useful info
        console.log("assetId:", asset.id);
        console.log("ownership:", asset.ownership);
        console.log("compression:", asset.compression);

        if (asset.ownership?.owner === owner) {
          console.log("assetId:", asset.id);
          return asset.id;
        }
      });

      return assetsIds;
    });

  return assets;
}