In Paypal IPN, I have a custom field when I am receiving a txn.type == subscr_payment message that is called option_selection2
(The input name on the html form is called "os1" by PayPal).
On a cancellation or expiration message type, that same field is called option_selection1
Does anyone know what these two fields (or really one field in two different situations) are named in PayPal WebHooks? And any documentation from PayPal that shows these names?
Sorry if this is a stupid question, but I couldn't find these documented.
PayPal Webhooks are for REST payments that use a clientID.
No such integrations have the classic fields you mention. So none of those fields are applicable to webhooks.