added total credits minted and burned

src/Controller.sol

@@ -20,6 +20,8 @@ contract Controller is Ownable (msg.sender) {
     uint256 public constant MILES_PER_CREDIT = 100;
     uint256 public creditPrice;
     uint256 public lastPriceUpdate;
+    uint256 public totalCreditsMinted;
+    uint256 public totalCreditsBurned;
     address public priceOracle;
 
     mapping(address => uint256) public creditBalance;
@@ -49,6 +51,9 @@ contract Controller is Ownable (msg.sender) {
 
         creditPrice = 100 * 10**6; // Initial price 100 USDC
         lastPriceUpdate = block.timestamp;
+
+        totalCreditsMinted = 0;
+        totalCreditsBurned = 0;
     }
 
     modifier onlyPriceOracle() {
@@ -106,7 +111,9 @@ contract Controller is Ownable (msg.sender) {
 
             creditBalance[driver] += creditsEarned;
             creditsMinted[driver] += creditsEarned;
-
+
+            totalCreditsMinted += creditsEarned;
+
             uint256 milesDriven = roundedCurrentReading - vehicleInfo.lastProcessedOdometer;
             emit CreditMinted(driver, creditsEarned, vin, milesDriven);
         }
@@ -131,6 +138,7 @@ contract Controller is Ownable (msg.sender) {
             emit CreditBurned(msg.sender, seller, 1);
         }
 
+        totalCreditsBurned += amount;
         creditBalance[msg.sender] += amount;
     }
 

test/CarbonIntegrationTest.sol

@@ -37,6 +37,9 @@ contract CarbonIntegrationTest is Test {
    function test_CompleteFlow() public {
        // Step 2: Process odometer readings - Add Queue verification
        vm.startPrank(owner);
+
+       assertEq(controller.totalCreditsMinted(), 0, "Total credits minted should be 0");
+         assertEq(controller.totalCreditsBurned(), 0, "Total credits burned should be 0");
 
        // Tesla1 drives 350 miles (3 credits)
        controller.registerVehicle(tesla1, "TESLA2023_1");
@@ -99,5 +102,9 @@ contract CarbonIntegrationTest is Test {
            tesla2InitialBalance + (1 * 100 * 10**6), 
            "Tesla2 should have received 100 USDC"
        );
+
+         // Verify total credits minted and burned
+        assertEq(controller.totalCreditsMinted(), 5, "Total credits minted should be 5");
+        assertEq(controller.totalCreditsBurned(), 4, "Total credits burned should be 4");
    }
 }