failure to submitting using ogmios

[reitcircles]

Here is the code:

``
import pycardano as pyc

network = pyc.Network.TESTNET

Read keys to memory

psk = pyc.PaymentExtendedSigningKey.load("payment.skey")
ssk = pyc.StakeExtendedSigningKey.load("stake.skey")

pvk = pyc.PaymentVerificationKey.from_signing_key(psk)
svk = pyc.StakeVerificationKey.from_signing_key(ssk)

Derive an address from payment verification key and stake verification key

address = pyc.Address(pvk.hash(), svk.hash(), network)

print(address)

Create an Ogmios chain context. In this example, we will use preprod network.

context = pyc.OgmiosV6ChainContext("localhost", 1337)

Create a transaction builder

builder = pyc.TransactionBuilder(context)

Tell the builder that transaction input will come from a specific address, assuming that there are some ADA and native

assets sitting at this address. "add_input_address" could be called multiple times with different address.

builder.add_input_address(address)

Get all UTxOs currently sitting at this address

utxos = context.utxos(address)

print(utxos)

We can also tell the builder to include a specific UTxO in the transaction.

Similarly, "add_input" could be called multiple times.

builder.add_input(utxos[0])

builder.ttl = 3600

output_address = pyc.Address.from_primitive("addr_test1qrwcxmlx56njze57fjypt2f6q2ctpv2tvx2gf2mf866ajsasqj43gyduezd0crpju8l9ps4fuu94z0rp86t00c4m3nzs8yf0nd")
output_value = pyc.Value.from_primitive([2000000,])
txout = pyc.TransactionOutput(output_address, output_value)
builder.add_output(txout)

Create final signed transaction

signed_tx = builder.build_and_sign([psk], change_address=address)
print(signed_tx)

Submit signed transaction to the network

context.submit_tx(signed_tx)
get_mempool_contents()
``

Here is the error:
raise ResponseError(f"Ogmios responded with error: {response}") ogmios.errors.ResponseError: Ogmios responded with error: {'jsonrpc': '2.0', 'method': 'submitTransaction', 'error': {'code': -32602, 'message': "Invalid transaction; It looks like the given transaction wasn't well-formed. Note that I try to decode the transaction in every possible era and it was malformed in ALL eras. Yet, I can't pinpoint the exact issue for I do not know in which era / format you intended the transaction to be. The 'data' field, therefore, contains errors for each era.", 'data': {'babbage': "invalid or incomplete value of type 'Transaction': decodeVerKeyDSIGN: wrong length, expected 32 bytes but got 0", 'conway': "invalid or incomplete value of type 'Transaction': decodeVerKeyDSIGN: wrong length, expected 32 bytes but got 0", 'alonzo': "invalid or incomplete value of type 'Transaction': decodeVerKeyDSIGN: wrong length, expected 32 bytes but got 0", 'mary': "invalid or incomplete value of type 'Transaction': Size mismatch when decoding Object / Array. Expected 4, but found 3.", 'allegra': "invalid or incomplete value of type 'Transaction': Size mismatch when decoding Object / Array. Expected 4, but found 3.", 'shelley': "invalid or incomplete value of type 'Transaction': Size mismatch when decoding Object / Array. Expected 4, but found 3."}}, 'id': None}

Have followed this: https://ogmios-python.readthedocs.io/en/stable/examples/build_tx_pycardano.html

Any help appreciated

[reitcircles]

@nielstron : could you pls check ...probably you are able to find the problem fast. thanks.

[cffls]

It seems like something when wrong in deriving the verification key.

What does it show when you print the following?

psk = pyc.PaymentExtendedSigningKey.load("payment.skey")
psk.to_verification_key()

Also, are you certain that payment.skey is actually an extended key? For normal keys, you should use PaymentSigningKey instead of PaymentExtendedSigningKey.

[reitcircles]

this is the response:
{"type": "PaymentVerificationKeyShelley_ed25519", "description": "PaymentVerificationKeyShelley_ed25519", "cborHex": "40"}