code: def can_query_state_for_block(self, block_identifier: BlockSpecification) -> bool:
          
          latest_block_number = self.block_number()
          preconditions_block = self.web3.eth.getBlock(block_identifier)
          preconditions_block_number = int(preconditions_block['number'])
          difference = latest_block_number - preconditions_block_number
          return difference < constants.NO_STATE_QUERY_AFTER_BLOCKS
docs: Returns if the provided block identifier is safe enough to query chain
          state for. If it's close to the state pruning blocks then state should
          not be queried.
          More info: https://github.com/raiden-network/raiden/issues/3566.