diff --git a/test/onChain/testBaseSepolia.sol b/test/onChain/testBaseSepolia.sol
index c667450..77ad9ba 100644
--- a/test/onChain/testBaseSepolia.sol
+++ b/test/onChain/testBaseSepolia.sol
@@ -3,34 +3,50 @@ pragma solidity ^0.8.24;
 
 import "forge-std/Test.sol";
 import "src/VotingPowerExchange.sol";
+import "src/ERC20UpgradeableTokenV1.sol";
 
 contract TestBaseSepolia is Test {
     VotingPowerExchange public votingPowerExchange;
     address public constant DEPLOYED_CONTRACT_ADDRESS = 0x8016b49aFd80A62191296e630174C2352129349A; // the actual deployed address on Base Sepolia
 
+    ERC20UpgradeableTokenV1 public utilityToken;
+
     function setUp() public {
         // Get the instance of the deployed contract
         votingPowerExchange = VotingPowerExchange(DEPLOYED_CONTRACT_ADDRESS);
+        utilityToken = ERC20UpgradeableTokenV1(0x091dFFe4A5625420a998589E451A15c753073Cda);
     }
 
     function testExchangeOnChain01() public {
         // Set up the state required for the test (if needed)
         // For example, simulate a user address
+        uint256 balanceBefore = utilityToken.balanceOf(0x588A7E62547CB573084C8608486d60E567c573d0);
+        
+        address sender = 0x588A7E62547CB573084C8608486d60E567c573d0;
+        uint256 amount = 2000000000000000000;
+        bytes32 nonce = bytes32(0x45a6cd4929f515c60c82473f16bc1fad9e8b95c04e18e76c7dfc9a6548cb5b60);
+        uint256 timestamp = 1727871292;
+        bytes memory signature = hex"bc9dd8b708b7ad5dd8dd68e422cd6b44ac6f6aebeabad4c1e52a1942e267c3af36e5d9aafff7fd8657444991613de3276a308bc858cc8e91e28f58142ff34faa1b";
+
         address exchanger = 0x5aB0ffF1a51ee78F67247ac0B90C8c1f1f54c37F;
         vm.startPrank(exchanger);
 
+
         // Call the exchange function
         votingPowerExchange.exchange(
-            0x588A7E62547CB573084C8608486d60E567c573d0,
-            2000000000000000000,
-            bytes32(0x45a6cd4929f515c60c82473f16bc1fad9e8b95c04e18e76c7dfc9a6548cb5b60),
-            1727871292,
-            hex"bc9dd8b708b7ad5dd8dd68e422cd6b44ac6f6aebeabad4c1e52a1942e267c3af36e5d9aafff7fd8657444991613de3276a308bc858cc8e91e28f58142ff34faa1b"
-        ); // Assuming exchange accepts a uint256 parameter
+            sender,
+            amount,
+            nonce,
+            timestamp,
+            signature
+        );
+        vm.stopPrank();
 
         // Make assertions to verify the results
-        // assertEq(votingPowerExchange.balanceOf(user), 100, "Exchange failed");
-
-        vm.stopPrank();
+        assertEq(
+            utilityToken.balanceOf(0x588A7E62547CB573084C8608486d60E567c573d0),
+            balanceBefore - 2000000000000000000,
+            "Exchange failed"
+        );
     }
 }