Update a topic
A transaction that updates the properties of an existing topic. This includes the topic memo, admin key, submit key, auto renew account, and auto renew period.
Field | Description |
|---|---|
Topic ID | Update the topic ID |
Admin Key | Set a new admin key that authorizes update topic and delete topic transactions. |
Submit Key | Set a new submit key for a topic that authorizes sending messages to this topic. |
Topic Memo | Set a new short publicly visible memo on the new topic and is stored with the topic. (100 bytes) |
Auto Renew Account | Set a new auto-renew account ID for this topic (once autoRenew functionality is supported by HAPI). |
Auto Renew Period | Set a new auto -enew period for this topic (once autoRenew functionality is supported by HAPI). |
Transaction Signing Requirements
- If an admin key is updated, the transaction must be signed by the pre-update admin key and post-update admin key.
- If the admin key was set during the creation of the topic, the admin key must sign the transaction to update any of the topic's properties
- If no adminKey was defined during the creation of the topic, you can only extend the expirationTime.
Transaction Fees
V1
Constructor | Description |
|---|---|
new ConsensusTopicUpdateTransaction() | Initializes the ConsensusTopicUpdateTransaction object |
new ConsensusTopicUpdateTransaction()
Methods
Method | Type | Requirements |
|---|---|---|
setTopicId(<topicId>) | TopicId | Required |
setAdminKey(<adminKey>) | Key | Optional |
setSubmitKey(<submitKey>) | Key | Optional |
setExpirationTime(<expirationTime>) | Instant | Optional |
setTopicMemo(<memo>) | String | Optional |
setAutoRenewAccountId(<accountId>) | AccountId | Optional |
setAutoRenewPeriod(<autoRenewAccountId>) | Duration | Optional |
clearAdminKey() | | Optional |
clearSubmitKey() | | Optional |
clearTopicMemo() | | Optional |
clearAutoRenewAccountId() | | Optional |
Java
//Create a transaction to add a submit key
ConsensusTopicUpdateTransaction transaction = new ConsensusTopicUpdateTransaction()
.setSubmitKey(submitKey);
//Sign the transaction with the admin key to authorize the update
ConsensusTopicUpdateTransaction signTx = transaction.build(client).sign(adminKey);
//Sign the transaction with the client operator, submit to a Hedera network, get the transaction ID
TransactionId txId = signTx.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
//Create a transaction to add a submit key
const transaction = await new ConsensusTopicUpdateTransaction()
.setSubmitKey(submitKey)
.build(client);
//Sign the transaction with the admin key to authorize the update
const signTx = await transaction.sign(adminKey);
//Sign the transaction with the client operator, submit to a Hedera network, get the transaction ID
const txId = await signTx.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
V2
Method | Type | Requirements |
|---|---|---|
getTopicId() | TopicId | Optional |
getAdminKey() | Key | Optional |
getSubmitKey() | Key | Optional |
getTopicMemo() | String | Optional |
getAutoRenewAccountId() | AccountId | Disabled |
getAutoRenewPeriod() | Duration | Disabled |
Java
//Create a transaction to add a submit key
TopicUpdateTransaction transaction = new TopicUpdateTransaction()
.setSubmitKey(submitKey);
//Get submit key
transaction.getSubmitKey()
//v2.0.0
JavaScript
//Create a transaction to add a submit key
const transaction = new TopicUpdateTransaction()
.setSubmitKey(submitKey);
//Get submit key
transaction.getSubmitKey()
//v2.0.0
Go
//Create the transaction
transaction := hedera.NewTopicUpdateTransaction()
SetSubmitKey()
transaction := transaction.GetSubmitKey()
//v2.0.0
Last modified 3mo ago