Update app.py

app.py

@@ -356,7 +356,7 @@ def issue_tokens(send,rec,amount):
                 mes = f"Sender has no wallet {e}"
                 pass
             if p==True:
-                balance = lod[-1]["balance"]
+                balance = lod["chain"][-1]["balance"]
                 print (balance)
                 balance_send =int(balance)-int(amount)
                 if balance_send >=0: