Verify signed algosdk transaction (javascript)

verify_txn.js

const algosdk = require('algosdk');
const nobleEd25519 = require('@noble/ed25519');

// setup connection to algoexplorer API
const algodClient = new algosdk.Algodv2("", 'https://api.testnet.algoexplorer.io', '');

// generate a standalone account
const account = algosdk.generateAccount();

(async () => {

    // create a transaction that will be signed
    const params = await algodClient.getTransactionParams().do();
    const txn = algosdk.makePaymentTxnWithSuggestedParamsFromObject({
        suggestedParams: {
            ...params,
        },
        from: account.addr,
        to: account.addr,
        amount: 0
    });

    // sign and decode transaction
    const sTxn = algosdk.signTransaction(txn, account.sk)
    const dTxn = algosdk.decodeSignedTransaction(sTxn.blob)

    // decode address to get the public key
    const dAddr = algosdk.decodeAddress(account.addr);
    const publicKey = dAddr.publicKey

    // get the bytes to sign from the transaction
    const hTxn = Buffer.from(txn.bytesToSign()).toString('hex');

    // get the signature from the signed transaction
    const sig = Buffer.from(dTxn.sig)

    // verify signature
    const verified = await nobleEd25519.verify(sig, hTxn, publicKey);

    // log verification status (should be true)
    console.log(verified)
})();