Event Time and Processing Time

Which clock a minute belongs to — and why the gateway's timestamp, not the wall clock, decides the bill

Two notions of time, one of them wrong for billing. GatewayMeter computes cost per tenant per minute; a 30-second retry delay makes processing-time windows bill the wrong minute. Event time bills the right one, at the price of deciding when a minute is over.

Estimated time: 75 minutes

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