diff --git a/challenge/index.ts b/challenge/index.ts
index 73e28a5..cd101f6 100644
--- a/challenge/index.ts
+++ b/challenge/index.ts
@@ -1,4 +1,4 @@
-import algosdk  from "algosdk";
+import algosdk from "algosdk";
 import * as algokit from '@algorandfoundation/algokit-utils';
 
 const algodClient = algokit.getAlgoClient()
@@ -10,30 +10,25 @@ const receiver = await algokit.mnemonicAccountFromEnvironment(
     algodClient,
   )
 
-/*
-TODO: edit code below
-
-Puzzle: 
-The below code is trying to send a payment from accounts[0] to accounts[1]. 
-However, the code is not working. fix the code so that the payment is sent 
-successfully. 
-
-When solved correctly, the console should print out the following:
-"Payment of 1000000 microAlgos was sent to RRYKB23LFR62G3P4SFINZDQ4FVDUNWWQ4NOF7K6TP5GO65BQCHYMNTR3CU at confirmed round 59"
-*/
 const suggestedParams = await algodClient.getTransactionParams().do();
 const txn = algosdk.makePaymentTxnWithSuggestedParamsFromObject({
     from: sender.addr,
     suggestedParams,
     to: receiver.addr,
-    amount: 1000000,
+    amount: 1000000,  // amount is in microAlgos
 });
 
-await algodClient.sendRawTransaction(txn).do();
+// Sign the transaction with sender's secret key
+const signedTxn = txn.signTxn(sender.sk);
+
+// Send the signed transaction (raw transaction bytes)
+await algodClient.sendRawTransaction(signedTxn).do();
+
+// Wait for confirmation
 const result = await algosdk.waitForConfirmation(
     algodClient,
     txn.txID().toString(),
-    3
+    3  // number of rounds to wait
 );
 
-console.log(`Payment of ${result.txn.txn.amt} microAlgos was sent to ${receiver.addr} at confirmed round ${result['confirmed-round']}`);
\ No newline at end of file
+console.log(`Payment of ${result.txn.txn.amt} microAlgos was sent to ${receiver.addr} at confirmed round ${result['confirmed-round']}`);