> If it's a payment processing, it's not acceptable In the payment processing company I'm working at we deal with that independently. We set some data on Redis

> If it's a payment processing, it's not acceptable In the payment processing company I'm working at we deal with that independently. We set some data on Redis with a TTL to signal some request has already been made in the last X minutes, and if the same request arrives again during the same period the cached response is served