Error when trying to submit signed ApplicationDeleteTxn transaction

AlgoSDK
1

Hello,

I’m trying to delete a deployed app (note: the app was created using teal version 4), but
I’m getting an error when trying to submit a signed ApplicationDeleteTxn transaction:

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/Cellar/python@3.8/3.8.2/Frameworks/Python.framework/Versions/3.8/lib/python3.8/runpy.py", line 193, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/usr/local/Cellar/python@3.8/3.8.2/Frameworks/Python.framework/Versions/3.8/lib/python3.8/runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "/dev/algo/src/main.py", line 46, in <module>
    nft_marketplace_service.delete_app(75908760)
  File "/dev/algo/src/services/nft_marketplace.py", line 52, in delete_app
    tx_id = NetworkInteraction.submit_transaction(
  File "/dev/algo/src/services/network_interaction.py", line 52, in submit_transaction
    txid = client.send_transaction(transaction)
  File "/usr/local/lib/python3.8/site-packages/algosdk/v2client/algod.py", line 194, in send_transaction
    return self.send_raw_transaction(encoding.msgpack_encode(txn),
  File "/usr/local/lib/python3.8/site-packages/algosdk/v2client/algod.py", line 211, in send_raw_transaction
    return self.algod_request("POST", req, data=txn, headers=headers, **kwargs)["txId"]
  File "/usr/local/lib/python3.8/site-packages/algosdk/v2client/algod.py", line 79, in algod_request
    raise error.AlgodHTTPError(e, code)
algosdk.error.AlgodHTTPError: {"message":"TransactionPool.Remember: transaction VR7T4QSOUAU4G4W7I46WOUEVZHV3EG3ZEVA3BEF5YI4UCINH7GQA: logic eval error: TEAL runtime encountered err opcode. Details: pc=11, opcodes===\nbnz label1\nerr\nlabel1:\n"}

This is the code I’m using (py algosdk):

        params = get_default_suggested_params(client=client)
        sender = algo_acc.address_from_private_key(private_key=creator_private_key)

        txn = algo_txn.ApplicationDeleteTxn(
            sender=sender,
            sp=params,
            index=index)

        signed_txn = txn.sign(private_key=creator_private_key)
        txid = client.send_transaction(signed_txn) # ERROR
        wait_for_confirmation(client, txid)

The args seems to be valid and the sender is the owner of the app. Any ideas why I’m getting this?

Thanks!

2

Does your contract allow for deletes? That is, is there a case in your handler to approve a transaction with the OnComplete set to delete? If its not handled, the application will decline the transaction.

When I see the encountered err opcode message its typically from some Cond where none of the cases match the transaction.

Ben

3

Ah that makes sense, no it doesn’t. Would just a

Txn.on_completion() == OnComplete.DeleteApplication,
on_delete,

on the program Cond where the on_delete just uses Approve() would be sufficient as a placeholder?

4

That fixed it thanks!

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