Manually sign a transaction

Sign a transaction using the private key(s) required to sign the transaction. You cannot sign the transaction with a public key. If your client operator account private key is the key used in the key field(s) of a transaction, you do not need to manually sign the transaction. The execute(client) method signs the transaction with the client operator account private key before it is submitted to a Hedera network.


Method	Type	Description
`sign(<privateKey>)`	PrivateKey	Sign the transaction with an ED25519 private key
`signWith(<publicKey, transactionSigner>)`	PublicKey, TransactionSigner	Sign the transaction with a callback that may block waiting for user confirmation.
`signWithOperator(<client>)`	Client	Sign the transaction with the client
`signWithSigner(<signer>)`		Sign the transaction with a local wallet. Local wallet available in Hedera JavaScript SDK only. >=`v2.11.0`

//Create any transaction
AccountUpdateTransaction transaction = new AccountUpdateTransaction()
     .setAccountId(accountId)
     .setKey(key);

//Freeze the transaction for signing
AccountUpdateTransaction freezeTransaction = transaction.freezeWith(client);

//Sign the transaction with a private key
AccountCreateTransaction signedTransaction = freezeTransaction
    .sign(PrivateKey.fromString("302e020100300506032b65700422042012a4a4add3d885bd61d7ce5cff88c5ef2d510651add00a7f64cb90de3359bc5c"));

//v2.0.0    