How to get a Token Account's Balance

The token account holds the token balance, which can be retrieved with a single PRC call

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

(async () => {
  const connection = new Connection(
    clusterApiUrl("http://127.0.0.1:8899"),
    "confirmed"
  );

  const tokenAccount = new PublicKey(
    "37iT6V7Y7EtnyiNcdbGVnjPRbMdzLJayKJ197jFXwpdB"
  );

  let tokenAmount = await connection.getTokenAccountBalance(tokenAccount);
  console.log(`amount: ${tokenAmount.value.amount}`);
  console.log(`decimals: ${tokenAmount.value.decimals}`);
})();

A token account can only hold one kind of mint. When you specify a token account, you also specific a mint too.

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