how to get logs and innerInstruction from Transaction with python in Solana Blockchain

Question

I am trying to get logs and innerInstruction from Raw instruction data.

The option to use the getTransaction RPC Method does not work, because the transaction I am trying to read is not yet in the blockchain. Its status is “pending”

In fact, I have already tried to call a simulation of this transaction. It seems like it should be possible to call a simulation without signatures. But no. The VersionedTransaction class expects private-keys, which it is clear that I do not have

Here is the transaction of which I need to get logs and innerInstruction

b'\x01\x1e+\xe9\xcd\x85\x1c\x8b\xeaQ\x04=\x9b\x0cN\xc2\xba\\ly\x8d\xc1\x15Sn\xe5xc\xbb\x0cf\xf4\xb4r\x9b\x82\x94\xd2\xa6\x8eN\x9f\x9b\n\x1b~&WF\xe8MKk\x02K[eU_(\xe3\x8dlT\r\x01\x00\t\x0e\xc5\xed\xbb\xaa\x8a\xf5\xa7\x0c\xb1\xebkW\xa3\xdf4\xaf\x94\xcd\xdd1[9\xc0o\xf5\xf8v\x82\x8af\x1aZX\x96\xe6\x9aq\x1bnI\x02@\xe34\xd1\xe6\x8dth\x85\xfcJ\xb2+d\xb4\xd8/\x19\xdcD%\xba_vL\xdf3x[]EW2\x81\x8a\x1aa\xf9\xcdE\x9b\xfeDx\xf2\xef\xecO\x94\xaay\x89"\xce\x02\xa5\xb4\x7f\xe6\xb3(Y\x8fcf\xc9\x00\xa4\xc3\x07\xf5\xac\xeb\xb0\x8f.u\x9fy_\xc8\x9e\x17\n\xda\xdc\xee\xad\x11\xe6\xa4\xfc)D\xa4\xfa\x82Q\xbe\xf8\x15Bn\x1b\xfb(\xc6\xb6dfw`|j\xd9\xf5f\xa6F\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01V\xe0\xf6\x93fZ\xcfD\xdb\x15h\xbf\x17[\xaaQ\x89\xcb\x97\xf5\xd2\xff;e]+\xb6\xfdm\x18\xb0\x03\x06Fo\xe5!\x172\xff\xec\xad\xbar\xc3\x9b\xe7\xbc\x8c\xe5\xbb\xc5\xf7\x12k,C\x9b:@\x00\x00\x00\x06\xa7\xd5\x17\x19,\\Q!\x8c\xc9L=J\xf1\x7fX\xda\xee\x08\x9b\xa1\xfdD\xe3\xdb\xd9\x8a\x00\x00\x00\x00\x06\xdd\xf6\xe1\xd7e\xa1\x93\xd9\xcb\xe1F\xce\xeby\xac\x1c\xb4\x85\xed_[7\x91:\x8c\xf5\x85~\xff\x00\xa9:\x86^i\xee\x0fT\x80\xca\xbc\xf6cW\xe4\xdc/\x18\xd5\x8dE\xc1\xeat\x89\xfb7#\xd9y<r\xa6n\xc3\xe2\x89\x1c{\xf2u7?\xcb\xb3\xa9\xd7 \xb4S\xb4\xf1\x87\xd0\x146\x98\n\xd9\xc3t!\x07\xc6\x8f\x8c\x97%\x8fN$\x89\xf1\xbb=\x10)\x14\x8e\r\x83\x0bZ\x13\x99\xda\xff\x10\x84\x04\x8e{\xd8\xdb\xe9\xf8Y\xac\xf16\xeb\x01\xfc\x1cN\x88=#\xc8\xb5\x84J\xb5\x9a7\xf6j\xddW\xc5\xe9\xac;S\xe0Y\xd3\\d\xec}$5\xa1Zv<os\x88k{3c&kzD\xa2\x92i!qNz\xef\xe95\x8a\xac\x12\x04\x0c\x07\x00\x01\x00\x0b\x05\t\x08\x00\x06\x0c\n\x04\x0b\x02\x03\x01\x00\x05\t\x08\r\x06\x1af\x06=\x12\x01\xda\xeb\xea\x000\xef}\xba\x02\x00\x00\x00\xe1\xf5\x05\x00\x00\x00\x00\x00\x00\x07\x00\t\x03@\r\x03\x00\x00\x00\x00\x00\x07\x00\x05\x02@\r\x03\x00'

Also, here's an example of the code I used to get the transaction simulation, but it doesn't work

raw_transaction = b'here raw data which is upper'
client = Client(f'https://mainnet.helius-rpc.com/?api-key={os.getenv("HELIUS_API_KEY")}')
transaction = Transaction.deserialize(raw_transaction)
blockhash_ = client.get_latest_blockhash()
message = MessageV0.try_compile(
    instructions=transaction.instructions,
    payer=transaction.fee_payer,
    recent_blockhash=blockhash_.value.blockhash,
    address_lookup_table_accounts=[]
)
versioned_transaction = VersionedTransaction(message=message, keypairs=[Keypair()])
resp = client.simulate_transaction(versioned_transaction)
print(resp.to_json())

I will be grateful for any help :)

Answer 1

When using the getTransaction RPC call, be sure to select the appropriate commitment level. For example, in testing, processed might be suitable since it's more likely to allow immediate retrieval. You could also try waiting a few seconds before fetching again if it doesn’t appear right away. For more on commitment levels, see this guide.

I'm not familiar with Python specifically, but the calls may be similar to those in solana/web3.js (version 1.x).

Calling simulate_transaction will return the same response as the RPC HTTP endpoint’s simulateTransaction method. See the documentation.

The response object is SimulateTransactionResp (reference), so the transaction simulation logs should be accessible via the value field.

To avoid requiring all signatures, set the sig_verify parameter to False (which I understand is False by default...)

def simulate_transaction(
    self,
    txn: Union[Transaction, VersionedTransaction],
    sig_verify: bool = False,
    commitment: Optional[Commitment] = None,
) -> SimulateTransactionResp:

When calling simulate, using VersionedTransaction(message=message, keypairs=[]) with empty keypairs may work then?