GET /chain

        Use the Chain API to retrieve the current state of the blockchain.
        The returned BlockchainInfo message is defined inside fabric.proto.

        message BlockchainInfo {
            uint64 height = 1;
            bytes currentBlockHash = 2;
            bytes previousBlockHash = 3;
        }
        ```

        :return: json body of the blockchain info

def chain_list(self):
        """ GET /chain

        Use the Chain API to retrieve the current state of the blockchain.
        The returned BlockchainInfo message is defined inside fabric.proto.

        message BlockchainInfo {
            uint64 height = 1;
            bytes currentBlockHash = 2;
            bytes previousBlockHash = 3;
        }
        ```

        :return: json body of the blockchain info
        """
        res = self._get(self._url("/chain"))
        return self._result(res, True)