问题
I got error 4003 from paypal PDT when I was trying to retrieve payment information using the transaction ID. Although I there's a similar thread here : Paypal PDT error 4003
and I believe the answer is because of my transaction ID has expired. However, I couldn't find any info of how long will the transaction ID expired.
p/s: My system is able to retrieve PDT info perfectly right after user return from paypal.
来源：https://stackoverflow.com/questions/23862124/paypal-pdt-transaction-id-expiration-period