Sign and submit transaction

[zweetdreamz]

Hi everyone,
How can I sign and submit transaction to blockchain?
I have transaction in cbor like 84a80083825...65397b73f5f6
I have tried this code, but it doesnt work for me

tx_body = Transaction.from_cbor(cbor_data).transaction_body
vk = PaymentVerificationKey.from_signing_key(sk)
signature = sk.sign(tx_body.hash())
vk_witnesses = [VerificationKeyWitness(vk, signature)]
signed_tx = Transaction(tx_body, TransactionWitnessSet(vkey_witnesses=vk_witnesses))
context.submit(signed_tx.to_cbor())

Thank you.

[cffls]

Hi @zweetdreamz , is there already something in the witness set in the original cbor_data? If so, you probably need to reuse the witness set instead of creating your own, something like this:

tx = Transaction.from_cbor(cbor_data)
tx_body = tx.transaction_body
vk = PaymentVerificationKey.from_signing_key(sk)
signature = sk.sign(tx_body.hash())
if tx.transaction_witness_set.vkey_witnesses is not None:
    tx.transaction_witness_set.vkey_witnesses.append(VerificationKeyWitness(vk, signature))
else:
    tx.transaction_witness_set.vkey_witnesses = [VerificationKeyWitness(vk, signature)]
context.submit(tx)