docs: Add repr method to src/hiero_sdk_python/tokens/custom_fixed_fee.py

CHANGELOG.md

@@ -19,6 +19,7 @@ This changelog is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.
 - Added TokenUnpauseTransaction class
 - Added expiration_time, auto_renew_period, auto_renew_account, fee_schedule_key, kyc_key in `TokenCreateTransaction`, `TokenUpdateTransaction` classes
 - Added comprehensive Google-style docstrings to the `CustomFee` class and its methods in `custom_fee.py`.
+- Added repr method to `src/hiero_sdk_python/tokens/custom_fixed_fee.py`, made `examples/custom_fee_fixed.` modular, and updated `tests/unit/test_custom_fee.py` correspondingly.
 
 ### Changed
 - chore: validate that token airdrop transactions require an available token service on the channel (#632) 

examples/custom_fee_fixed.py

@@ -1,29 +1,41 @@
 """
-Run with: 
+Example for creating and displaying a CustomFixedFee object.
+
+This example demonstrates:
+1.  How to instantiate CustomFixedFee.
+2.  The output of the new __repr__ method for clear debugging.
+3.  How to convert the fee object to its protobuf representation.
+
+Run with:
 uv run examples/custom_fixed_fee.py
 python examples/custom_fixed_fee.py
 """
 from hiero_sdk_python.tokens.custom_fixed_fee import CustomFixedFee
 from hiero_sdk_python.account.account_id import AccountId
 from hiero_sdk_python.tokens.token_id import TokenId
 
-def custom_fixed_fee():
+def demonstrate_custom_fixed_fee():
+    """Creates and displays a CustomFixedFee."""
+
+    # 1. Create the CustomFixedFee object
     fixed_fee = CustomFixedFee(
         amount=100,
         denominating_token_id=TokenId(0, 0, 123),
         fee_collector_account_id=AccountId(0, 0, 456),
         all_collectors_are_exempt=False,
     )
-    print("CustomFixedFee:")
-    print(f"Amount: {fixed_fee.amount}")
-    print(f"Denominating Token ID: {fixed_fee.denominating_token_id}")
-    print(f"Fee Collector Account ID: {fixed_fee.fee_collector_account_id}")
-    print(f"All Collectors Exempt: {fixed_fee.all_collectors_are_exempt}")
-    # Convert to protobuf
+
+    # 2. Print the object directly to see the __repr__ output
+    print("--- CustomFixedFee (using __repr__) ---")
+    print(fixed_fee)
+
+    # 3. Convert to protobuf
     fixed_fee_proto = fixed_fee._to_proto()
 
-    print("Fixed Fee Protobuf:", fixed_fee_proto)
+    print("\n--- Fixed Fee Protobuf ---")
+    print(fixed_fee_proto)
 
 
 if __name__ == "__main__":
-    custom_fixed_fee()
+    # Call the main function when the script is executed
+    demonstrate_custom_fixed_fee()

src/hiero_sdk_python/tokens/custom_fixed_fee.py

@@ -36,6 +36,8 @@ class CustomFixedFee(CustomFee):
             custom fee is attached to.
     """
 
+    __slots__ = ("amount", "denominating_token_id")
+
     def __init__(
         self,
         amount: int = 0,
@@ -181,7 +183,7 @@ def _to_topic_fee_proto(self) -> "custom_fees_pb2.FixedCustomFee":
 
         Raises:
             ValueError: If the fee amount is negative or potentially if IDs are invalid.
-                 (Note: Current implementation doesn't explicitly check amount >= 0).
+                (Note: Current implementation doesn't explicitly check amount >= 0).
         """
         from hiero_sdk_python.hapi.services import custom_fees_pb2
 
@@ -261,4 +263,21 @@ def __eq__(self, other: "CustomFixedFee") -> bool:
         Returns:
             bool: True if the objects are considered equal, False otherwise.
         """
-        return super().__eq__(other) and self.amount == other.amount and self.denominating_token_id == other.denominating_token_id
+        if not isinstance(other, CustomFixedFee):
+            return False
+
+        return (
+            super().__eq__(other) and 
+            self.amount == other.amount and 
+            self.denominating_token_id == other.denominating_token_id
+        )
+
+    def __repr__(self) -> str:
+        """Generates a developer-friendly string representation of the object."""
+        return (
+            f"{self.__class__.__name__}("
+            f"amount={self.amount}, "
+            f"denominating_token_id={self.denominating_token_id!r}, "
+            f"fee_collector_account_id={self.fee_collector_account_id!r}, "
+            f"all_collectors_are_exempt={self.all_collectors_are_exempt})"
+        )

tests/unit/test_custom_fee.py

@@ -17,14 +17,20 @@ def test_custom_fixed_fee():
         all_collectors_are_exempt=True,
     )
 
-    proto = fee._to_proto()  # Changed from _to_protobuf
-    new_fee = CustomFixedFee._from_proto(proto)  # Changed from CustomFee._from_protobuf
-
+    proto = fee._to_proto()
+    new_fee = CustomFixedFee._from_proto(proto)
     assert isinstance(new_fee, CustomFixedFee)
     assert new_fee.amount == 100
     assert new_fee.denominating_token_id == TokenId(0, 0, 123)
     assert new_fee.fee_collector_account_id == AccountId(0, 0, 456)
     assert new_fee.all_collectors_are_exempt is True
+    assert fee == new_fee
+    fee_repr = repr(fee)
+    assert "CustomFixedFee" in fee_repr
+    assert "amount=100" in fee_repr
+    assert "denominating_token_id=TokenId(shard_num=0, realm_num=0, num=123)" in fee_repr
+    assert "fee_collector_account_id=AccountId(shard_num=0, realm_num=0, num=456)" in fee_repr
+    assert "all_collectors_are_exempt=True" in fee_repr
 
 def test_custom_fractional_fee():
     fee = CustomFractionalFee(
@@ -37,8 +43,8 @@ def test_custom_fractional_fee():
         all_collectors_are_exempt=False,
     )
 
-    proto = fee._to_proto()  # Changed from _to_protobuf
-    new_fee = CustomFractionalFee._from_proto(proto)  # Changed from CustomFee._from_protobuf
+    proto = fee._to_proto()
+    new_fee = CustomFractionalFee._from_proto(proto)
 
     assert isinstance(new_fee, CustomFractionalFee)
     assert new_fee.numerator == 1
@@ -48,6 +54,7 @@ def test_custom_fractional_fee():
     assert new_fee.assessment_method == FeeAssessmentMethod.EXCLUSIVE
     assert new_fee.fee_collector_account_id == AccountId(0, 0, 456)
     assert new_fee.all_collectors_are_exempt is False
+    assert fee == new_fee
 
 def test_custom_royalty_fee():
     fallback_fee = CustomFixedFee(
@@ -62,8 +69,8 @@ def test_custom_royalty_fee():
         all_collectors_are_exempt=True,
     )
 
-    proto = fee._to_proto()  # Changed from _to_protobuf
-    new_fee = CustomRoyaltyFee._from_proto(proto)  # Changed from CustomFee._from_protobuf
+    proto = fee._to_proto()
+    new_fee = CustomRoyaltyFee._from_proto(proto)
 
     assert isinstance(new_fee, CustomRoyaltyFee)
     assert new_fee.numerator == 5
@@ -72,4 +79,5 @@ def test_custom_royalty_fee():
     assert new_fee.all_collectors_are_exempt is True
     assert isinstance(new_fee.fallback_fee, CustomFixedFee)
     assert new_fee.fallback_fee.amount == 50
-    assert new_fee.fallback_fee.denominating_token_id == TokenId(0, 0, 789)
+    assert new_fee.fallback_fee.denominating_token_id == TokenId(0, 0, 789)
+    assert fee == new_fee