diff --git a/run.py b/run.py
index f1e157a..6f12332 100644
--- a/run.py
+++ b/run.py
@@ -13,15 +13,25 @@
 # limitations under the License.
 
 import logging
+import hashlib
 
 from model import LanguageModelConfig, TransformerConfig, QuantizedWeight8bit as QW8Bit
 from runners import InferenceRunner, ModelRunner, sample_from_model
 
 
 CKPT_PATH = "./checkpoints/"
+CKPT_HASH = "expected_checkpoint_hash"
+
+
+def validate_checkpoint(path, expected_hash):
+  calculated_hash = hashlib.sha256(open(path, 'rb').read()).hexdigest()
+  if calculated_hash != expected_hash:
+    raise ValueError("Invalid checkpoint file!")
 
 
 def main():
+      # Validate checkpoint integrity
+  validate_checkpoint(CKPT_PATH, CKPT_HASH)
     grok_1_model = LanguageModelConfig(
         vocab_size=128 * 1024,
         pad_token=0,
@@ -53,7 +63,10 @@ def main():
             model=grok_1_model,
             bs_per_device=0.125,
             checkpoint_path=CKPT_PATH,
+        # Limit inference rate
+  inference_runner.rate_limit = 100
         ),
+        
         name="local",
         load=CKPT_PATH,
         tokenizer_path="./tokenizer.model",
@@ -65,8 +78,16 @@ def main():
 
     inp = "The answer to life the universe and everything is of course"
     print(f"Output for prompt: {inp}", sample_from_model(gen, inp, max_len=100, temperature=0.01))
+  # Add authentication
+  @app.route("/inference")
+  @auth.login_required
+  def inference():
+    ...
+  
+  gen = inference_runner.run()
 
+  # Rest of inference code
 
 if __name__ == "__main__":
-    logging.basicConfig(level=logging.INFO)
+  logging.basicConfig(level=logging.INFO)
     main()