Class CreateTopicExtensions

Extension methods for creating consensus topics.

Inheritance

object

CreateTopicExtensions

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: Hiero

Assembly: Hiero.dll

Syntax

public static class CreateTopicExtensions

Methods

CreateTopicAsync(ConsensusClient, CreateTopicParams, Action<IConsensusContext>?)

Creates a new topic instance with the given create parameters.

Declaration

public static Task<CreateTopicReceipt> CreateTopicAsync(this ConsensusClient client, CreateTopicParams createParameters, Action<IConsensusContext>? configure = null)

Parameters

Type	Name	Description
ConsensusClient	client	The Consensus Node Client orchestrating the create.
CreateTopicParams	createParameters	Details regarding the topic to instantiate.
Action<IConsensusContext>	configure	Optional callback method providing an opportunity to modify the execution configuration for just this method call. It is executed prior to submitting the request to the network.

Returns

Type	Description
Task<CreateTopicReceipt>	A transaction receipt with a description of the newly created topic.

Examples

Create a topic gated by separate admin and submit keys:

// Create a topic with an admin key (required to update or delete it)
// and a separate submit key (required on every SubmitMessage call).
// Both key-holders must sign CreateTopic.
var receipt = await client.CreateTopicAsync(new CreateTopicParams
{
    Memo = "Gated topic",
    Administrator = adminEndorsement,
    Submitter = submitterEndorsement,
    RenewPeriod = TimeSpan.FromDays(90)
});
Console.WriteLine($"Topic: {receipt.Topic}");

Exceptions

Type	Condition
ArgumentException	If required arguments are missing or invalid.
InvalidOperationException	If required context configuration is missing.
PrecheckException	If the gateway node refused the transaction. Only a code about the transaction itself proves it did not execute; any other code leaves the outcome unknown, so settle it by its transaction id on a mirror node rather than resubmitting it (see PrecheckException).
ConsensusException	If the outcome could not be confirmed: the transaction may have executed, so settle it by its transaction id on a mirror node rather than resubmitting it.
TransactionException	If the network rejected the request as invalid or had missing data.