How to determine if transaction is "transfer" / "buying" / "selling"

[Teyz]

Hello,

I'm currently working on a project and I need data from transaction.
In order to get the PnL, I need to know if a transaction is a buying transaction or not.

I'm using getParsedTransaction but I have empty Parsed or Data fields.
Do you guys have a solution ?

Is this normal that asString and asInstructionInfo are in private and not in public ??

type InstructionInfoEnvelope struct {
	asString          string
	asInstructionInfo *InstructionInfo
}

Thanks