Twenty-eight seconds
Payment provider gives you 28 seconds to answer. Take 29 and it voids, then keeps resending until you reply. We weren't de-duplicating them. You can guess the rest. (The long version.)
Payments (2 posts)
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Payments are a distributed system: the 28-second void
In 2014 we looked after a system that took payments from a payment provider and passed them on to the systems that held customer accounts. The rules we were playing by The provider wanted an answer to …