SignTransaction

Signs an unsigned transaction with a secret phrase, returning the signed transaction JSON and bytes.

Endpoint

POST /nxt?requestType=signTransaction

Parameters

Name	Type	Required	Description
unsignedTransactionJSON	string	No	Unsigned transaction JSON
unsignedTransactionBytes	string	No	Unsigned transaction bytes (hex)
prunableAttachmentJSON	string	No	Prunable attachment JSON
secretPhrase	string	Yes	Sender's secret passphrase
validate	boolean	No	true

Either unsignedTransactionJSON or unsignedTransactionBytes is required.

Request Example

curl -X POST http://localhost:22024/nxt \
  -d "requestType=signTransaction" \
  -d "unsignedTransactionBytes=abc123..." \
  -d "secretPhrase=your_phrase" \
  -d "validate=true"

Response

{
  "transactionJSON": "{...}",
  "fullHash": "abc123...",
  "signatureHash": "def456...",
  "transactionBytes": "hexBytes",
  "verify": true,
  "requestProcessingTime": 5
}

Response Fields

Field	Type	Description
transactionJSON	string	Signed transaction JSON
fullHash	string	Transaction full hash
signatureHash	string	Signature hash
transactionBytes	string	Signed transaction bytes (hex)
verify	boolean	Whether signature verification passed
requestProcessingTime	number	API request processing time in milliseconds

Source

SignTransaction.java

Tags

TRANSACTIONS