Charge creation with idempotency key
Review this Java payment endpoint. Clients send an `Idempotency-Key` header to make charge creation safe to retry.
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0:00 of about 20 min
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1public ChargeResult createCharge(String idempotencyKey, ChargeRequest req) {
2 Optional<ChargeResult> existing = idemRepo.findByKey(idempotencyKey);
3 if (existing.isPresent()) {
4 return existing.get();
5 }
6 ChargeResult result = processor.charge(req);
7 idemRepo.save(idempotencyKey, result);
8 return result;
9}
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