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Hello
I have a question about initialization of web button.

The paymentID, that i have to insert on script tag, have to be created ever time that i create a button, or i can call the createpayment API only one time and reuse the paymentID received?

I see that there is a parameter "expiration_date" on createpayment API but i have not understand if this is the maximum date of validity of paymentID

Thanks