diff --git a/iot-integration/api/iot_api.py b/iot-integration/api/iot_api.py
index 5e6d3573d..4d047284c 100644
--- a/iot-integration/api/iot_api.py
+++ b/iot-integration/api/iot_api.py
@@ -1,43 +1,46 @@
-from flask import Flask, request, jsonify
+from data_encryption import encrypt_data
 from device_auth import DeviceAuth
-from iot_devices import SmartHomeDevice, WearableDevice, AutonomousVehicleDevice
+from flask import Flask, jsonify, request
+from iot_devices import AutonomousVehicleDevice, SmartHomeDevice, WearableDevice
 from microtransactions import MicrotransactionHandler
-from data_encryption import encrypt_data
 
 app = Flask(__name__)
 
 # Initialize the device authentication instance
-device_auth = DeviceAuth('device_id', 'device_secret')
+device_auth = DeviceAuth("device_id", "device_secret")
 
 # Initialize the microtransaction handler instance
-microtransaction_handler = MicrotransactionHandler('microtransactions.db')
+microtransaction_handler = MicrotransactionHandler("microtransactions.db")
 
-@app.route('/iot/devices', methods=['GET'])
+
+@app.route("/iot/devices", methods=["GET"])
 def get_iot_devices():
     # Return a list of supported IoT devices
-    return jsonify(['Smart Home', 'Wearable', 'Autonomous Vehicle'])
+    return jsonify(["Smart Home", "Wearable", "Autonomous Vehicle"])
+
 
-@app.route('/iot/devices/<device_type>', methods=['POST'])
+@app.route("/iot/devices/<device_type>", methods=["POST"])
 def register_iot_device(device_type):
     # Register a new IoT device
-    device_id = request.json['device_id']
-    device_token = request.json['device_token']
-    if device_type == 'Smart Home':
+    device_id = request.json["device_id"]
+    device_token = request.json["device_token"]
+    if device_type == "Smart Home":
         device = SmartHomeDevice(device_id, device_token)
-    elif device_type == 'Wearable':
+    elif device_type == "Wearable":
         device = WearableDevice(device_id, device_token)
-    elif device_type == 'Autonomous Vehicle':
+    elif device_type == "Autonomous Vehicle":
         device = AutonomousVehicleDevice(device_id, device_token)
     else:
-        return jsonify({'error': 'Invalid device type'}), 400
-    return jsonify({'device_id': device_id, 'device_token': device_token})
+        return jsonify({"error": "Invalid device type"}), 400
+    return jsonify({"device_id": device_id, "device_token": device_token})
 
-@app.route('/iot/transactions', methods=['POST'])
+
+@app.route("/iot/transactions", methods=["POST"])
 def make_iot_transaction():
     # Make a transaction using an IoT device
-    device_id = request.json['device_id']
-    transaction_id = request.json['transaction_id']
-    amount = request.json['amount']
+    device_id = request.json["device_id"]
+    transaction_id = request.json["transaction_id"]
+    amount = request.json["amount"]
     device = get_iot_device(device_id)
     if device:
         # Authenticate the device
@@ -46,24 +49,26 @@ def make_iot_transaction():
             if device.make_payment(amount):
                 # Create a microtransaction
                 microtransaction_handler.create_microtransaction(transaction_id, amount)
-                return jsonify({'transaction_id': transaction_id, 'amount': amount})
+                return jsonify({"transaction_id": transaction_id, "amount": amount})
             else:
-                return jsonify({'error': 'Transaction failed'}), 400
+                return jsonify({"error": "Transaction failed"}), 400
         else:
-            return jsonify({'error': 'Device authentication failed'}), 401
+            return jsonify({"error": "Device authentication failed"}), 401
     else:
-        return jsonify({'error': 'Invalid device ID'}), 404
+        return jsonify({"error": "Invalid device ID"}), 404
+
 
 def get_iot_device(device_id):
     # Retrieve an IoT device instance
-    if device_id.startswith('SH'):
-        return SmartHomeDevice(device_id, 'device_token')
-    elif device_id.startswith('WR'):
-        return WearableDevice(device_id, 'device_token')
-    elif device_id.startswith('AV'):
-        return AutonomousVehicleDevice(device_id, 'device_token')
+    if device_id.startswith("SH"):
+        return SmartHomeDevice(device_id, "device_token")
+    elif device_id.startswith("WR"):
+        return WearableDevice(device_id, "device_token")
+    elif device_id.startswith("AV"):
+        return AutonomousVehicleDevice(device_id, "device_token")
     else:
         return None
 
-if __name__ == '__main__':
+
+if __name__ == "__main__":
     app.run(debug=True)