Update main.py

main.py

@@ -249,7 +249,7 @@ def get_spending_overview():
 # Modified verify_admin function (now checks database is_admin flag)
 # ========================================
 def verify_admin(auth_header):
-    if not auth_header.startswith('Bearer '):
+    if not auth_header or not auth_header.startswith('Bearer '):
         raise ValueError('Invalid token')
     
     token = auth_header.split(' ')[1]
@@ -414,7 +414,11 @@ def view_receipt(transaction_id):
         verify_admin(request.headers.get('Authorization', ''))
         transaction_ref = db.reference(f'transactions/{transaction_id}')
         transaction_data = transaction_ref.get()
-        return jsonify({'error': str(e)+f'transaction data:{transaction_data}'}), 500
+        if not transaction_data:
+            return jsonify({'error': 'Transaction not found'}), 404
+
+        image_url = transaction_data.get('image_url')
+        return jsonify({'error': str(e)+f"image: {image_url}"}), 500
 
 @app.route('/api/admin/receipt/<string:transaction_id>/download', methods=['GET'])
 def download_receipt(transaction_id):