I've readed numbers of thread here but non answer to my question. What I want to know if there is a way somehow to validate transactionID ( txID ).
I have a site which accepts bitcoins. In order to validate payments I ask customer to submit txID which I use to look up the transaction. The problem is that customers sometime submit wrong txID, not full txID .. etc.
Is there a way to validate transaction ID WHEN USER SUBMIT IT TO THE FORM and if is correct then save it and check it?