code: def close(
              self,
              nonce: Nonce,
              balance_hash: BalanceHash,
              additional_hash: AdditionalHash,
              signature: Signature,
              block_identifier: BlockSpecification,
      ):
          
          self.token_network.close(
              channel_identifier=self.channel_identifier,
              partner=self.participant2,
              balance_hash=balance_hash,
              nonce=nonce,
              additional_hash=additional_hash,
              signature=signature,
              given_block_identifier=block_identifier,
          )
docs: Closes the channel using the provided balance proof.