feat: create order on DM

helpers.py

@@ -1,7 +1,7 @@
 import base64
 import json
 import secrets
-from typing import Optional
+from typing import Any, Optional, Tuple
 
 import secp256k1
 from cffi import FFI
@@ -73,9 +73,9 @@ def copy_x(output, x32, y32, data):
     return 1
 
 
-def is_json(string: str):
+def order_from_json(s: str) -> Tuple[Optional[Any], Optional[str]]:
     try:
-        json.loads(string)
-    except ValueError as e:
-        return False
-    return True
+        order = json.loads(s)
+        return (order, None) if "items" in order else (None, s)
+    except ValueError:
+        return None, s