code: def get_filter_args_for_all_events_from_channel(
          token_network_address: TokenNetworkAddress,
          channel_identifier: ChannelID,
          contract_manager: ContractManager,
          from_block: BlockSpecification = GENESIS_BLOCK_NUMBER,
          to_block: BlockSpecification = 'latest',
  ) -> Dict:
      
  
      event_filter_params = get_filter_args_for_specific_event_from_channel(
          token_network_address=token_network_address,
          channel_identifier=channel_identifier,
          event_name=ChannelEvent.OPENED,
          contract_manager=contract_manager,
          from_block=from_block,
          to_block=to_block,
      )
  
      # As we want to get all events for a certain channel we remove the event specific code here
      # and filter just for the channel identifier
      # We also have to remove the trailing topics to get all filters
      event_filter_params['topics'] = [None, event_filter_params['topics'][1]]
  
      return event_filter_params
docs: Return the filter params for all events of a given channel.