I do not understand this IPN values:
status=COMPLETED
transaction[0].status_for_sender_txn=Pending
transaction[0].status=Pending
I'm using adaptive payments, but I don't know why status is allways COMPLETED and transaction[0].status is allways Pending!!!!
I'm using sandbox, but I don't understand why the transactions are allways pending, I don't know when to enable the buyer to download the contents that he payed...
And there is no official documentation on the web...