Hello Im trying to get the metadata for the latest 5 newly minted tokens on the blockchain, I keep getting the error

const args = this._buildArgsAtLeastConfirmed([address.toBase58()], commitment, undefined, options);

TypeError: Cannot read properties of undefined (reading 'toBase58') at Connection.getSignaturesForAddress (C:\Users\user\node_modules@solana\web3.js\lib\index.cjs.js:7691:59) at main (C:\Users\user\OneDrive\Desktop\Solana\solana.js:20:45) at process.processTicksAndRejections (node:internal/process/task_queues:95:5)

Here is my code

const { Connection, clusterApiUrl, PublicKey } = require('@solana/web3.js');
const { TOKEN_PROGRAM_ID, Token } = require("@solana/spl-token");

async function fetchTokenMetadata(connection, tokenMintAddress) {
  const token = new Token(connection, tokenMintAddress, TOKEN_PROGRAM_ID, null);
  const tokenInfo = await token.getMintInfo();
  return tokenInfo;

async function main() {
  const connection = new Connection(clusterApiUrl('mainnet-beta'), 'confirmed');

  // Fetch the latest blockhash
  const latestBlockhash = await connection.getLatestBlockhash();

  // Fetch the latest slot
  const latestSlot = latestBlockhash.blockhash.slot;

  // Fetch the most recent signatures
  const recentSignatures = await connection.getSignaturesForAddress(
    { limit: 100, before: null },

  const filteredSignatures = recentSignatures.filter(signature => signature.slot <= latestSlot);

  // Extract token accounts from signatures
  const tokenAccountAddresses = filteredSignatures
    .flatMap(signature => {
      const transaction = connection.current.rpc.getTransaction(signature.signature, 'confirmed');
      return transaction.transaction.message.instructions
        .filter(instruction => instruction.programId.equals(TOKEN_PROGRAM_ID))
        .flatMap(instruction => instruction.accounts
          .filter(account => account.isSigner || account.isWritable)
          .map(account => account.toString())
    .slice(0, 5); // Limits to the 5 latest token accounts can change later

  const promises = tokenAccountAddresses.map(async (mintAddress) => {
    return fetchTokenMetadata(connection, new PublicKey(mintAddress));

  const tokenInfos = await Promise.all(promises);

  tokenInfos.forEach((tokenInfo, index) => {
    console.log(`Token Metadata for ${tokenAccountAddresses[index]}:`);


I would appreciate if anyone could help me with this as its been really hard so far to learn and use solanas tools.


1 Answer 1


The Connection object doesn't have a publicKey field, which is why you're getting an undefined address. You can see all its fields/methods here: https://solana-labs.github.io/solana-web3.js/classes/Connection.html

I'm not sure which address you're expecting that to be. But you probably want something like this:

// use your address
const myPublicKey = new PublicKey('B556Hnif217eTSdyTFkwvVXAWftfDXFkxrAeKGfpHEQ');

const recentSignatures = await connection.getSignaturesForAddress(
    { limit: 100, before: null },
  • Honestly these docs dont make any sense to me they are so confusing idk what to do
    – Golden
    Commented May 9 at 18:10
  • What address are you trying to get transactions for? And which doc did you get connection.publicKey from, we shouldn't have that documented anywhere because it doesn't exist so I think wherever you got that is likely the source of confusion here.
    – Callum M
    Commented May 9 at 18:52
  • I found it in the libraries source code, in this code I was trying to get the transactions related to the mainnet by using its public key
    – Golden
    Commented May 9 at 21:36
  • The objective was for me to get metadata for all newly minted tokens, the 5 latest ones at least
    – Golden
    Commented May 9 at 21:36

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