let response = await connection.getTokenAccountsByOwner(wallet.publicKey, {"mint": new PublicKey("Mint token")})
response.value.forEach((e) => {
     console.log(`pubkey: ${e.pubkey.toBase58()}`);
     const accountInfo = SPLToken.AccountLayout.decode(e.account.data);
     console.log(`mint: ${new PublicKey(accountInfo.mint)}`);
     console.log(`amount: ${SPLToken.u64.fromBuffer(accountInfo.amount)}`);

having an error with this one ${SPLToken.u64.fromBuffer(accountInfo.amount)}`);

TypeError: Cannot read properties of undefined (reading 'fromBuffer')

  • 1
    Please provide some more context.
    – beeman
    Feb 15 at 15:02

1 Answer 1


You can see here https://solana-labs.github.io/solana-program-library/token/js/ that the function


does not exists anymore as of version 0.2.0

You will want to use this instead:

import { getAccount } from '@solana/spl-token';

const parsedTokenAccountInfo = await getAccount(connection, tokenAccount);

which will result in this output:

tokenAccountInfo {
  address: PublicKey [PublicKey(7iFn7U1uPWwe4z47v3fP28Mc5F9pqmgYrz9UsjdtzvAj)] {
    _bn: <BN: 63b7a4dec1368066ff069b2a1e84d584dfde9d7a6ea7a520e4945352abef4cc0>
  mint: PublicKey [PublicKey(GiyzqXQUeQr3HZcF9W7a4pDGGbj6qsqxcAKmkFH75tXY)] {
    _bn: <BN: e9a0906181e586a3ad825d611c6e92e4fabb5d5152cdbd8a4f3d52dbd9cc1d17>
  owner: PublicKey [PublicKey(5vJwnLeyjV8uNJSp1zn7VLW8GwiQbcsQbGaVSwRmkE4r)] {
    _bn: <BN: 4916d20d019fe32a08c4facde04ed651a95b3798ed738891df27f4e610cbe02b>
  amount: 5000000000n,
  delegate: null,
  delegatedAmount: 0n,
  isInitialized: true,
  isFrozen: false,
  isNative: false,
  rentExemptReserve: null,
  closeAuthority: null,
  tlvData: <Buffer 07 00 00 00>

For your specific case you can now use:

import { AccountLayout } from "@solana/spl-token";

let response = await connection.getTokenAccountsByOwner(wallet.publicKey, {"mint": mintkeyPair.publicKey})
    response.value.forEach((e) => {
        console.log(`pubkey: ${e.pubkey.toBase58()}`);
        const accountInfo = AccountLayout.decode(e.account.data);
        console.log(`amount: ${accountInfo.amount}`);
  • thanks I need to convert accountInfo.amount to number Feb 17 at 6:54
  • I have just called getTokenAccountsByOwner via http request. Feb 18 at 6:29

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