diff --git a/challenge/index.ts b/challenge/index.ts
index e459cef..532f155 100644
--- a/challenge/index.ts
+++ b/challenge/index.ts
@@ -1,10 +1,8 @@
 import algosdk from "algosdk";
 import * as algokit from '@algorandfoundation/algokit-utils';
 
-// Set up algod client
 const algodClient = algokit.getAlgoClient()
 
-// Retrieve 2 accounts from localnet kmd
 const sender = await algokit.getLocalNetDispenserAccount(algodClient)
 
 const receiver = await algokit.mnemonicAccountFromEnvironment(
@@ -12,19 +10,6 @@ const receiver = await algokit.mnemonicAccountFromEnvironment(
     algodClient,
   )
 
-/*
-TODO: edit code below
-
-Description: 
-The below code is trying to atomically send 2 payment from sender to receiver 
-account by grouping them into an atomic transaction composer. 
-However, the code is not working. find and fix the bug so that the 2 payments are 
-successfully sent atomically.
-
-When solved correctly, the console should print out the following:
-"The first payment transaction sent 1000000 microAlgos and the second payment transaction sent 2000000 microAlgos"
-*/
-
 const suggestedParams = await algodClient.getTransactionParams().do();
 const ptxn1 = algosdk.makePaymentTxnWithSuggestedParamsFromObject({
     from: sender.addr,
@@ -32,20 +17,15 @@ const ptxn1 = algosdk.makePaymentTxnWithSuggestedParamsFromObject({
     to: receiver.addr,
     amount: 1000000,// 1 ALGO
 });
-
-/// <reference lib="dom" />
-
 const ptxn2 = algosdk.makePaymentTxnWithSuggestedParamsFromObject({
     from: sender.addr,
     suggestedParams,
     to: receiver.addr,
-    amount: 2000000, // 2 ALGOs
+ amount: 2000000, // 2 ALGOs
 });
-
+const senderTransactionSigner = algokit.getSenderTransactionSigner(sender)
 const atc = new algosdk.AtomicTransactionComposer()
-atc.addTransaction({txn: ptxn1, signer: sender})
-atc.addTransaction({txn: ptxn2, signer: sender})
-
+atc.addTransaction({txn: ptxn1, signer: senderTransactionSigner})
+atc.addTransaction({txn: ptxn2, signer: senderTransactionSigner})
 const result = await algokit.sendAtomicTransactionComposer({atc:atc, sendParams: {suppressLog:true}}, algodClient)
-console.log(`The first payment transaction sent ${result.transactions[0].amount} microAlgos and the second payment transaction sent ${result.transactions[1].amount} microAlgos`)
-
+console.log(`The first payment transaction sent ${result.transactions[0].amount} microAlgos and the second payment transaction sent ${result.transactions[1].amount} microAlgos`)
\ No newline at end of file