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Copper Lane Payments Read-only example
confirmed confirmed decline no answer before deadline already processed new, compatible evidence Payment request arrives Payment service Record pay-1001 before calling the processor Payment service Submit pay-op-1001 with the same parameters Payment service What does the available evidence establish? Payment service Payment confirmed; the shop may fulfil Checkout Record the confirmed payment outcome Payment service Confirmed decline; an explicit new attempt is possible Checkout Start another payment with a new key Payment service Another payment may exist; the first is still unknown Checkout A processor confirmation arrives separately Confirmation handler Was this confirmation identity already processed? Confirmation handler Duplicate evt-9001; recorded outcome unchanged Confirmation handler Record the compatible confirmation and payment outcome Payment service
Step Decision Error
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