Add a flag to enable/disable auto CONSTR_ID

Author: cffls

pycardano/plutus.py

@@ -7,7 +7,7 @@
 from dataclasses import dataclass, field, fields
 from enum import Enum
 from hashlib import sha256
-from typing import Any, Optional, Type, Union
+from typing import Any, ClassVar, Optional, Type, Union
 
 import cbor2
 from cbor2 import CBORTag
@@ -468,6 +468,9 @@ class will reduce the complexity of serialization and deserialization tremendous
         >>> assert test == Test.from_cbor("d87a9f187b43333231ff")
     """
 
+    AUTO_ID: ClassVar[bool] = False
+    """Enables automatic assignment of a deterministic constructor id (CONSTR_ID) for the Plutus data if set to True."""
+
     @classproperty
     def CONSTR_ID(cls):
         """
@@ -476,6 +479,9 @@ def CONSTR_ID(cls):
         The default implementation is an almost unique, deterministic constructor ID in the range 1 - 2^32 based
         on class attributes, types and class name.
         """
+        if not cls.AUTO_ID:
+            return 0
+
         k = f"_CONSTR_ID_{cls.__name__}"
         if not hasattr(cls, k):
             det_string = (

test/pycardano/test_plutus.py

@@ -207,7 +207,7 @@ def test_plutus_data_from_json_wrong_data_structure_type():
 def test_plutus_data_hash():
     assert (
         bytes.fromhex(
-            "19d31e4f3aa9b03ad93b64c8dd2cc822d247c21e2c22762b7b08e6cadfeddb47"
+            "923918e403bf43c34b4ef6b48eb2ee04babed17320d8d1b9ff9ad086e86f44ec"
         )
         == PlutusData().hash().payload
     )
@@ -324,10 +324,12 @@ def test_clone_plutus_data():
 def test_unique_constr_ids():
     @dataclass
     class A(PlutusData):
+        AUTO_ID = True
         pass
 
     @dataclass
     class B(PlutusData):
+        AUTO_ID = True
         pass
 
     assert (
@@ -337,6 +339,7 @@ class B(PlutusData):
 
     @dataclass
     class B(PlutusData):
+        AUTO_ID = True
         a: int
         b: bytes
 
@@ -348,6 +351,7 @@ class B(PlutusData):
 
     @dataclass
     class B(PlutusData):
+        AUTO_ID = True
         a: bytes
         b: bytes
 
@@ -359,13 +363,15 @@ class B(PlutusData):
 def test_deterministic_constr_ids_local():
     @dataclass
     class A(PlutusData):
+        AUTO_ID = True
         a: int
         b: bytes
 
     A_tmp = A
 
     @dataclass
     class A(PlutusData):
+        AUTO_ID = True
         a: int
         b: bytes
 
@@ -381,6 +387,7 @@ def test_deterministic_constr_ids_global():
 
 @dataclass
 class A(PlutusData):
+    AUTO_ID = True
     a: int
     b: bytes