feat: add CustomFeeLimit and revenue generating topics functionality (#388)

* feat: add CustomFeeLimit

Signed-off-by: dosi <dosi.kolev@limechain.tech>

* test: add unit tests

Signed-off-by: dosi <dosi.kolev@limechain.tech>

* feat: add CustomFeeLimit field in Transaction

Signed-off-by: dosi <dosi.kolev@limechain.tech>

* feat: add CustomFeeLimit setters in TopicMessageSubmitTransaction

Signed-off-by: dosi <dosi.kolev@limechain.tech>

* test: add more tests in topic message submit unit tests

Signed-off-by: dosi <dosi.kolev@limechain.tech>

* feat: add new fields to topic create

Signed-off-by: dosi <dosi.kolev@limechain.tech>

* test: update and add more unit tests for topic create transaction

Signed-off-by: dosi <dosi.kolev@limechain.tech>

* feat: add topic update fields

Signed-off-by: dosi <dosi.kolev@limechain.tech>

* feat: add fields in topic info

Signed-off-by: dosi <dosi.kolev@limechain.tech>

* test: add topic update unit test

Signed-off-by: dosi <dosi.kolev@limechain.tech>

* test: add topic message submit integration test

Signed-off-by: dosi <dosi.kolev@limechain.tech>

* test: add topic update unit tests

Signed-off-by: dosi <dosi.kolev@limechain.tech>

* fix: fix imports and minor issues in fee and fixed fee

Signed-off-by: dosi <dosi.kolev@limechain.tech>

* test: add topic info unit tests

Signed-off-by: dosi <dosi.kolev@limechain.tech>

* test: add generating revenue topics integration tests

Signed-off-by: dosi <dosi.kolev@limechain.tech>

* chore: update changelog

Signed-off-by: dosi <dosi.kolev@limechain.tech>

* chore: add custom fee classes to __init__.py

Signed-off-by: dosi <dosi.kolev@limechain.tech>

* docs: add revenue generating topics example

Signed-off-by: dosi <dosi.kolev@limechain.tech>

* chore: address PR feedback

Signed-off-by: dosi <dosi.kolev@limechain.tech>

* style: format topic message submit transaction integration tests

Signed-off-by: dosi <dosi.kolev@limechain.tech>

* feat: add custom fee limits to scheduled transactions

Signed-off-by: dosi <dosi.kolev@limechain.tech>

* test: add integration tests for scheduled topic message submit transaction

Signed-off-by: dosi <dosi.kolev@limechain.tech>

* fix: integration test failure

Signed-off-by: dosi <dosi.kolev@limechain.tech>

* chore: update CHANGELOG to unreleased

Signed-off-by: dosi <dosi.kolev@limechain.tech>

---------

Signed-off-by: dosi <dosi.kolev@limechain.tech>

Author: Dosik13

CHANGELOG.md

@@ -8,6 +8,11 @@ This changelog is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.
 
 ## [Unreleased]
 
+### Added
+- add revenue generating topic tests/example
+- add fee_schedule_key, fee_exempt_keys, custom_fees fields in TopicCreateTransaction, TopicUpdateTransaction, TopicInfo classes
+- add CustomFeeLimit class
+
 ### Fixed
 - Incompatible Types assignment in token_transfer_list.py