feat: implement createTopic functionality and related parameters in TCK handlers

Signed-off-by: MonaaEid <monaa_eid@hotmail.com>

Author: MonaaEid

tck/handlers/topic.py

@@ -86,6 +86,7 @@ def _get_auto_renew_account_state(client, auto_renew_account_id: str | None) ->
             return "deleted"
         return "unknown"
 
+
 @rpc_method("createTopic")
 def create_topic(params: CreateTopicParams) -> CreateTopicResponse:
     client = get_client(params.sessionId)

tck/param/topic.py

@@ -16,6 +16,7 @@
 @dataclass
 class CreateTopicFixedFeeParams:
     """Parameters for a fixed fee custom fee in topic creation."""
+
     amount: int | None = None
     denominatingTokenId: str | None = None
 
@@ -30,6 +31,7 @@ def parse_json_params(cls, params: dict) -> CreateTopicFixedFeeParams:
 @dataclass
 class CreateTopicCustomFeeParams:
     """Parameters for a custom fee in topic creation."""
+
     feeCollectorAccountId: str | None = None
     feeCollectorsExempt: bool | None = None
     fixedFee: CreateTopicFixedFeeParams | None = None
@@ -52,6 +54,7 @@ def parse_json_params(cls, params: dict) -> CreateTopicCustomFeeParams:
 @dataclass
 class CreateTopicParams(BaseTransactionParams):
     """Parameters for creating a topic. Extends BaseTransactionParams to include common transaction parameters."""
+   
     memo: str | None = None
     adminKey: str | None = None
     submitKey: str | None = None

tck/util/param_utils.py

@@ -38,7 +38,6 @@ def non_empty_string_or_none(value: str | None) -> str | None:
     return cleaned if cleaned else None
 
 
-
 def non_empty_string_list(values) -> list[str] | None:
     """Trim list entries and remove empty-string items."""
     if values is None:

tests/tck/topic_handlers_test.py

@@ -1,4 +1,5 @@
 """Focused createTopic tests for TCK handlers."""
+
 from __future__ import annotations
 
 from unittest.mock import MagicMock, patch
@@ -78,7 +79,9 @@ def test_build_custom_fee_and_reject_empty_collector():
     assert fee.denominating_token_id == TokenId(0, 0, 500)
     assert fee.all_collectors_are_exempt is True
     with pytest.raises(ValueError, match="feeCollectorAccountId cannot be empty"):
-        _build_custom_fee(CreateTopicCustomFeeParams(feeCollectorAccountId="", fixedFee=CreateTopicFixedFeeParams(amount=1)))
+        _build_custom_fee(
+            CreateTopicCustomFeeParams(feeCollectorAccountId="", fixedFee=CreateTopicFixedFeeParams(amount=1))
+            )
 
 
 def test_build_transaction_core_fields():