feat!(python): drop Mapping protocol support from MessageType

python/src/trezorlib/btc.py

@@ -15,6 +15,7 @@
 # If not, see <https://www.gnu.org/licenses/lgpl-3.0.html>.
 
 import warnings
+from copy import copy
 from decimal import Decimal
 from typing import TYPE_CHECKING, Any, Dict, Sequence, Tuple
 
@@ -235,7 +236,7 @@ def sign_tx(
     serialized_tx = b""
 
     def copy_tx_meta(tx: messages.TransactionType) -> messages.TransactionType:
-        tx_copy = messages.TransactionType(**tx)
+        tx_copy = copy(tx)
         # clear fields
         tx_copy.inputs_cnt = len(tx.inputs)
         tx_copy.inputs = []

python/src/trezorlib/protobuf.py

@@ -23,6 +23,7 @@ For serializing (dumping) protobuf types, object with `Writer` interface is requ
 """
 
 import logging
+import warnings
 from io import BytesIO
 from itertools import zip_longest
 from typing import (
@@ -30,7 +31,6 @@ from typing import (
     Callable,
     Dict,
     Iterable,
-    Iterator,
     List,
     Optional,
     Tuple,
@@ -38,7 +38,6 @@ from typing import (
     TypeVar,
     Union,
 )
-import warnings
 
 from typing_extensions import Protocol
 
@@ -280,15 +279,6 @@ class MessageType(metaclass=_MessageTypeMeta):
             d[key] = value
         return "<%s: %s>" % (self.__class__.__name__, d)
 
-    def __iter__(self) -> Iterator[str]:
-        return iter(self.keys())
-
-    def keys(self) -> Iterator[str]:
-        return (name for name, _, _ in self.get_fields().values())
-
-    def __getitem__(self, key: str) -> Any:
-        return getattr(self, key)
-
     def ByteSize(self) -> int:
         data = BytesIO()
         dump_message(data, self)

tests/bip32.py

@@ -17,6 +17,7 @@
 import hashlib
 import hmac
 import struct
+from copy import copy
 
 import ecdsa
 from ecdsa.curves import SECP256k1
@@ -67,7 +68,7 @@ def public_ckd(public_node, n):
     if not isinstance(n, list):
         raise ValueError("Parameter must be a list")
 
-    node = messages.HDNodeType(**public_node)
+    node = copy(public_node)
 
     for i in n:
         node = get_subnode(node, i)