How to get all the NFTs for Metaplex Candy Machine without using the Metaplex JS SDK?

Question

I want to fetch all the NFT lists for the candy machine. Of course, if we use the Metaplex JS SDK it will be easy.

But I'd love to fetch NFTs by using Solana Web3 APIs.

Answer 1

There is a great answer here already: https://stackoverflow.com/a/70601874/18965981

What you have to do is run a GPA against the candy machine v2 program to find all the mint addresses.

import { Connection, clusterApiUrl, PublicKey } from '@solana/web3.js';
import bs58 from 'bs58';

const connection = new Connection(clusterApiUrl('mainnet-beta'));
const MAX_NAME_LENGTH = 32;
const MAX_URI_LENGTH = 200;
const MAX_SYMBOL_LENGTH = 10;
const MAX_CREATOR_LEN = 32 + 1 + 1;
const MAX_CREATOR_LIMIT = 5;
const MAX_DATA_SIZE = 4 + MAX_NAME_LENGTH + 4 + MAX_SYMBOL_LENGTH + 4 + MAX_URI_LENGTH + 2 + 1 + 4 + MAX_CREATOR_LIMIT * MAX_CREATOR_LEN;
const MAX_METADATA_LEN = 1 + 32 + 32 + MAX_DATA_SIZE + 1 + 1 + 9 + 172;
const CREATOR_ARRAY_START = 1 + 32 + 32 + 4 + MAX_NAME_LENGTH + 4 + MAX_URI_LENGTH + 4 + MAX_SYMBOL_LENGTH + 2 + 1 + 4;

const TOKEN_METADATA_PROGRAM = new PublicKey('metaqbxxUerdq28cj1RbAWkYQm3ybzjb6a8bt518x1s');
const CANDY_MACHINE_V2_PROGRAM = new PublicKey('cndy3Z4yapfJBmL3ShUp5exZKqR3z33thTzeNMm2gRZ');
const candyMachineId = new PublicKey('ENTER_YOUR_CANDY_MACHINE_ID_HERE');

const getMintAddresses = async (firstCreatorAddress: PublicKey) => {
  const metadataAccounts = await connection.getProgramAccounts(
      TOKEN_METADATA_PROGRAM,
      {
        // The mint address is located at byte 33 and lasts for 32 bytes.
        dataSlice: { offset: 33, length: 32 },

        filters: [
          // Only get Metadata accounts.
          { dataSize: MAX_METADATA_LEN },

          // Filter using the first creator.
          {
            memcmp: {
              offset: CREATOR_ARRAY_START,
              bytes: firstCreatorAddress.toBase58(),
            },
          },
        ],
      },
  );

  return metadataAccounts.map((metadataAccountInfo) => (
      bs58.encode(metadataAccountInfo.account.data)
  ));
};

const getCandyMachineCreator = async (candyMachine: PublicKey): Promise<[PublicKey, number]> => (
    PublicKey.findProgramAddress(
        [Buffer.from('candy_machine'), candyMachine.toBuffer()],
        CANDY_MACHINE_V2_PROGRAM,
    )
);

(async () => {

  const candyMachineCreator = await getCandyMachineCreator(candyMachineId);
  getMintAddresses(candyMachineCreator[0]);

})();