Hedera
Search…
Submit a message
A transaction that submits a topic message to the Hedera network. To access the messages submitted to a topic ID, subscribe to the topic via a mirror node. The mirror node will publish the ordered messages to subscribers. Once the transaction is successfully executed, the receipt of the transaction will include the topic's updated sequence number and topic running hash.
Transaction Signing Requirements
  • Anyone can submit a message to a public topic
  • The submitKey is required to sign the transaction for a private topic
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
HCS message size: 1024 bytes
V2
V1
Constructor
Description
new TopicMessageSubmitTransaction()
Initializes a TopicMessageSubmitTransaction object
new TopicMessageSubmitTransaction()

Methods

Method
Type
Description
Requirement
setTopicId(<topicId>)
TopicId
The topic ID to submit the message to
Required
setMessage(<message>)
String
The message in a String format
Optional
setMessage(<message>)
byte [ ]
The message in a byte array format
Optional
setMessage(<message>)
ByteString
The message in a ByteString format
Optional
Java
//Create the transaction
TopicMessageSubmitTransaction transaction = new TopicMessageSubmitTransaction()
.setTopicId(newTopicId)
.setMessage("hello, HCS! ");
​
//Sign with the client operator key and submit transaction to a Hedera network, get transaction ID
TransactionResponse txResponse = transaction.execute(client);
​
//Request the receipt of the transaction
TransactionReceipt receipt = txResponse.getReceipt(client);
​
//Get the transaction consensus status
Status transactionStatus = receipt.status;
​
System.out.println("The transaction consensus status is " +transactionStatus);
//v2.0.0
JavaScript
//Create the transaction
await new TopicMessageSubmitTransaction({
topicId: createReceipt.topicId,
message: "Hello World",
}).execute(client);
​
//v2.0.0
Go
//Create the transaction
transaction := hedera.NewTopicSubmitTransaction().
SetTopicID(topicID).
SetMessage([]byte(content))
​
//Sign with the client operator private key and submit the transaction to a Hedera network
txResponse, err := transaction.Execute(client)
if err != nil {
panic(err)
}
​
//Request the receipt of the transaction
transactionReceipt, err := txResponse.GetReceipt(client)
if err != nil {
panic(err)
}
​
//Get the transaction consensus status
transactionStatus := receipt.Status
​
fmt.Printf("The transaction consensus status is %v\n", transactionStatus)
//v2.0.0
Constructor
Description
new ConsensusMessageSubmitTransaction()
Initializes a ConsensusMessageSubmitTransaction object
new ConsensusMessageSubmitTransaction()

Methods

Method
Type
Description
Requirement
setTopicId(<topicId>)
TopicId
The topic ID to submit the message to
Required
setMessage(<message>)
String
The message in a String format
Optional
setMessage(<message>)
byte [ ]
The message in a byte array format
Optional
setMessage(<message>)
ByteString
The message in a ByteString format
Optional
setMaxChunk(<maxChunks>)
int
The number of chunks to break the message into. Default:10
Optional
setMaxChunkInfo(<initial Transactionid ,totalNumber, number>)
TransactionId, int, int
initialId: TransactionID of the first chunk, gets copied to every subsequent chunk in a fragmented message.
total: total number of chunks
number: The sequence number (from 1 to total) of the current chunk in the message.
Optional
Java
//Submits a message to a public topic
new ConsensusMessageSubmitTransaction()
.setTopicId(topicId)
.setMessage("hello, HCS! " + i)
.build(client)
.execute(client)
.getReceipt(client);
​
//v1.3.2
JavaScript
//Submits a message to a public topic
await new ConsensusMessageSubmitTransaction()
.setTopicId(topicId)
.setMessage("hello, HCS! " + i)
.build(client)
.execute(client)
.getReceipt(client);
​
//v1.4.4

Get transaction values

V2
Method
Type
Description
getTopicId()
TopicId
The topic ID to submit the message to
getMessage()
ByteString
The message being submitted
getAllTransactionHash()
byte [ ]
The hash for each transaction
Java
//Create the transaction
TopicMessageSubmitTransaction transaction = new TopicMessageSubmitTransaction()
.setTopicId(newTopicId)
.setMessage("hello, HCS! ");
​
//Get the transaction message
ByteString getMessage = transaction.getMessage();
//v2.0.0
JavaScript
//Create the transaction
const transaction = await new TopicMessageSubmitTransaction()
.setTopicId(newTopicId)
.setMessage("hello, HCS! ");
​
//Get the transaction message
const getMessage = transaction.getMessage();
​
//v2.0.0
Go
//Create the transaction
transaction := hedera.NewTopicSubmitTransaction().
SetTopicID(topicID).
SetMessage([]byte(content))
​
//Get the transaction message
getMessage := transaction.GetMessage()
//v2.0.0
Copy link
Edit on GitHub