What to watch
A payment is the one thing you must never do twice. Each charge carries a key, and a retry of a charge already made gets the stored answer back instead of a second charge. Right click the card networks and inject errors. The breaker beside them opens, and charges start failing immediately instead of hanging. A payment that fails cleanly can be retried; one left in the air while a slow network times out is the one nobody can account for. Dashboards read copies of the ledger, behind their own limit. Someone loading a big report can never make a payment wait, because the two never share a queue.What it is made of
Under load
Measured by running this design through the simulator at multiples of its own offered rate of 220 requests a second. Twenty seconds of simulated time, one fixed seed, so the same numbers come out every time.Open this example
Load Stripe: correctness over availability from the Examples menu and drag the traffic slider yourself.