customers have a transaction number to identify their purchases. When they have a problem with the transaction, they tell us this transaction number. They do not have any further number.
-> This is NOT the paymentId / saleId / orderId.
Looking at the PayPal REST API, I can not find any call to get details of the transaction providing the transaction number. I'd like to get the paymentId (PAY-XXXXXXXXXXX) or invoice number.
The transaction is made with the Android SDK.
Question: How do we get the paymentId (PAY-XXXXXXXXXXX) from the transaction number using the REST API?
Thank you!