Class UpdateTopicParams

Represents the properties on a topic that can be changed. Any property set to

null

on this object when submitted to the UpdateTopicAsync(UpdateTopicParams, Action<IContext>) method will be left unchanged by the system. The transaction must be appropriately signed as described by the original Administrator endorsement in order to make changes. If there is no administrator endorsement specified, the topic is imutable and cannot be changed.

Inheritance

Object

UpdateTopicParams

Inherited Members

Object.Equals(Object)

Object.Equals(Object, Object)

Object.GetHashCode()

Object.GetType()

Object.MemberwiseClone()

Object.ReferenceEquals(Object, Object)

Object.ToString()

Namespace: Hashgraph

Assembly: Hashgraph.dll

Syntax

public sealed class UpdateTopicParams

Properties

Administrator

Replace this Topics's current administrative key signing rquirements with new signing requirements. To completely remove the administrator key and make the Topic imutable, use the None endorsement value.

Declaration

public Endorsement Administrator { get; set; }

Property Value

Type	Description
Endorsement

Remarks

For this request to be accepted by the network, both the current private key(s) for this account and the new private key(s) must sign the transaction.
The existing key must sign for security and the new key must sign as a safeguard to avoid accidentally changing the key to an invalid value.

Memo

The publicly visible memo to be associated with the topic.

Declaration

public string Memo { get; set; }

Property Value

Type	Description
String

Participant

Identify any key requirements for submitting messages to this topic. If left blank, no changes will be made. To completely remove the key requirements and make the Topic open for all to submit, use the None endorsement value.

Declaration

public Endorsement Participant { get; set; }

Property Value

Type	Description
Endorsement

RenewAccount

Optional address of the account supporting the auto renewal of the topic at expiration time. The topic lifetime will be extended by the RenewPeriod at expiration time if this account contains sufficient funds. The private key associated with this account must sign the transaction if RenewAccount is specified.

Declaration

public Address RenewAccount { get; set; }

Property Value

Type	Description
Address

RenewPeriod

Incremental period for auto-renewal of the topic account. If the associated account does not have sufficient funds to renew at the expiration time, it will be renewed for a period of time the remaining funds can support. If no funds remain, the topic instance will be deleted.

Declaration

public TimeSpan? RenewPeriod { get; set; }

Property Value

Type	Description
Nullable<TimeSpan>

Signatory

Additional private key, keys or signing callback method required to update this topic. Typically matches the Administrator endorsement associated with this contract.

Declaration

public Signatory Signatory { get; set; }

Property Value

Type	Description
Signatory

Remarks

Keys/callbacks added here will be combined with those already identified in the client object's context when signing this transaction to change the state of this account. They will not be asked to sign transactions to retrieve the record if the "WithRecord" form of the method call is made. The client will rely on the Signatory from the context to sign the transaction requesting the record.

Topic

The network address of the topic to update.

Declaration

public Address Topic { get; set; }

Property Value

Type	Description
Address