Delete a topic

A transaction that deletes a topic from the Hedera network. Once a topic is deleted, the topic cannot be recovered to receive messages and all submitMessage calls will fail. Older messages can still be accessed, even after the topic is deleted, via the mirror node.

Transaction Signing Requirements

• If the adminKey was set upon the creation of the topic, the adminKey is required to sign to successfully delete the topic

• If no adminKey was set upon the creating of the topic, you cannot delete the topic and will receive an UNAUTHORIZED error

Transaction Fees

• Please see the transaction and query fees table for base transaction fee

• Please use the Hedera fee estimator to estimate your transaction fee cost

V1

Constructor	Description
new ConsensusTopicDeleteTransaction()	Initializes a ConsensusTopicDeleteTransaction object

new ConsensusTopicDeleteTransaction()

Methods

Method	Type	Description
setTopicId(<topicId>)	TopicId	The ID of the topic to delete

Java

ConsensusTopicDeleteTransaction transaction = new ConsensusTopicDeleteTransaction()
     .setTopicId(newTopicId);

//Sign the transaction with the admin key, sign with the client operator and submit the transaction to a Hedera network, get the transaction ID
TransactionId txId = transaction.build(client).sign(adminKey).execute(client);

//Request the receipt of the transaction
TransactionReceipt receipt = txId.getReceipt(client);

//Get the transaction consensus status
Status transactionStatus = receipt.status;

System.out.println("The transaction consensus status is " +transactionStatus);

//v1.3.2

JavaScript

const transaction = new ConsensusTopicDeleteTransaction()
     .setTopicId(newTopicId);

//Sign the transaction with the admin key, sign with the client operator and submit the transaction to a Hedera network, get the transaction ID
const txId = await transaction.build(client).sign(adminKey).execute(client);

//Request the receipt of the transaction
const receipt = await txId.getReceipt(client);

//Get the transaction consensus status
const transactionStatus = receipt.status;

console.log("The transaction consensus status is " +transactionStatus);

//v1.4.4

Get transaction values

V2

Method	Type	Description	Requirement
getTopicId(<topicId>)	TopicId	The ID of the topic to delete	Required

Java

//Create the transaction
TopicDeleteTransaction transaction = new TopicDeleteTransaction()
    .setTopicId(newTopicId);

//Get topic ID
TopicId getTopicId = transaction.getTopicId(); 

//v2.0.0

JavaScript

//Create the transaction
const transaction = new TopicDeleteTransaction()
    .setTopicId(newTopicId);

//Get topic ID
const getTopicId = transaction.getTopicId();

//v2.0.0

Go

//Create the transaction
transaction := hedera.NewTopicDeleteTransaction().
		SetTopicID(topicID)

//Get topic ID
getTopicId := transaction.GetTopicID()

//v2.0.0