Possible to improve typing of the from_cbor method?

[mpizenberg]

I’m trying to convert back into a Transaction some cbor hex representing some signed transaction.
Currently, I’m using tx = Transaction.from_cbor(signed_tx_hex), but the type annotations for that from_cbor() function says it returns a CBORSerializable instead of the actual class calling that class method.

As a result, the type checker does not recognize it as a transaction, and isn’t happy about calling tx.id on it. So I can ignore the type checker, but I was wondering if it was possible to improve the typing annotation somehow such that the type checker doesn’t get tripped up on that. Or if there is a fundamental reason why it is CBORSerializable and not the potential subclass being use instead.

[cffls]

Could you please give a minimum example of how you are using the type checker? I think this is fixable and an example of test case would be helpful.

[mpizenberg]

Yes sure, here is the reproducible gist: https://gist.github.com/mpizenberg/771ed233d483a02d23940be579f2a04a