ConsensusTopicInfo

Field	Type	Description
memo	​	Short publicly visible memo about the topic. No guarantee of uniqueness.
runningHash	​	When a topic is created, its running hash is initialized to 48 bytes of binary zeros. For each submitted message, the topic’s running hash is then updated to the output of a particular SHA-384 digest whose input data include the previous running hash. See the TransactionReceipt.proto documentation for an exact description of the data included in the SHA-384 digest used for the update.
sequenceNumber		Sequence number (starting at 1 for the first submitMessage) of messages on the topic.
expirationTime	​Timestamp​	Effective consensus timestamp at (and after) which submitMessage calls will no longer succeed on the topic and the topic will expire and after AUTORENEW_GRACE_PERIOD be automatically deleted.
adminKey	​Key​	Access control for update/delete of the topic. Null if there is no key.
submitKey	​Key​	Access control for ConsensusService.submitMessage. Null if there is no key.
autoRenewPeriod	​Duration​	The duration in which to renew the topic
autoRenewAccount	​AccountID​	Null if there is no autoRenewAccount.
ledger_id	bytes	The ledger ID the response was returned from; please see HIP-198 for the network-specific IDs.