Get the balance of SPL Tokens from a connected wallet to a DAPP

Question

could someone help me with this:?

I've been trying to get the amount of tokens of a connected wallet from a TokenAccount.

Right Below you can see that I successfully retrieved the TokenAccount address and the spl tokens supply but I don't know what's next...

I want to get only the amount of SPL TOKENS from the wallet connected to my DAPP. Ty and have a good day.

            // Check for Solana & Phantom
            var provider = () => {
            if ("solana" in window) {
                var provider = window.solana;
                if (provider.isPhantom) {
                return provider;
                } else {
                return false;
                }
            }
            window.open("https://phantom.app", "_blank");
            };

            var phantom = provider();

            if (phantom !== false) {

console.log("Phantom Wallet Found, Connecting..");

try {

                // Connect to Solana
                var connect_wallet = phantom.connect();

                // After Connecting
                phantom.on("connect", () => {
                    conn.addEventListener('click', () => {
                        user_balance.classList.toggle('expand');
                    })

                  // Check Connection
                console.log("Phantom Connected: " + phantom.isConnected);

                  // Get Wallet Address
                const wallet = phantom.publicKey;
                var wallet_address = phantom.publicKey.toString();
                console.log("Solana Wallet Address: " + wallet_address);
                var first = wallet_address.substring(0, 5);
                document.getElementById('wallet-address').innerHTML = first + '...';

                (async () => {
                    const connection = new solanaWeb3.Connection(solanaWeb3.clusterApiUrl("mainnet-beta"),
                        'confirmed',
                    );
                
                    if (phantom && phantom.publicKey !== null) {
                        const tokenAccount = new solanaWeb3.PublicKey(
                            "J3Lw33iBvMLHdCua4MXohTx3HD4JcajQmogQEr2Y7pej"
                          );
                        
                          let tokenAmount = await connection.getTokenAccountBalance(tokenAccount);
                          console.log(`amount: ${tokenAmount.value.amount}`);
      
                        const balance = await connection.getBalance(phantom.publicKey);
                        console.log(balance / 1000000000);
                    }
                })();

Answer 1

If I understood you right, your code works, but you need to get the TokenAccount address from the wallet right?

What you can do is: call getTokenAccountsByOwner(pubKey) and then check all the token accounts TokenAccountInfo mint if its the mint of your specific token.

Then you can call getTokenAccountBalance on that account like you already do.

To make it more performant you can directly specify the mint in the getTokenAccountsByOwner function. Then you can save the token account in the client and only call getTokenAccountBalance form then on.

Answer 2

I'm using this snippet myself

export const getTokenBalance = async (walletAddress:string, tokenMintAddress:string):Promise<number> => {
  try{
    const connection = new Connection(process.env.SOLANA_RPC_ENDPOINT, 'confirmed')
    const walletTokenAccounts = await connection.getParsedTokenAccountsByOwner(new PublicKey(walletAddress), {
      mint: new PublicKey(tokenMintAddress)
    })
    if(walletTokenAccounts && walletTokenAccounts.value && walletTokenAccounts.value.length > 0){
      const walletTokenAccount = walletTokenAccounts.value[0]
      const amount = walletTokenAccount.account.data.parsed.info.tokenAmount.uiAmount
      console.log(`amount: ${amount}`);
      return amount
    }
  }catch(e){
    console.error(e)
  }
  return 0
}

walletAddress would be your wallet_address tokenMintAddress would be the address of the SPL token. For example if you were looking to get the balance of BONK, you would use DezXAZ8z7PnrnRJjz3wXBoRgixCa6xjnB7YaB1pPB263