Technology
Network retries and double-clicks can cause customers to be charged twice. Design a payment flow that is safe under retries and partial failures, with clear behavior for timeouts, refunds, and reconciliation.
The brief
Solve it in plain text with any AI you like, in about 10 to 20 minutes. A judge scores how you reasoned, not whether you matched an answer.
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Score distribution
Not enough scored sessions yet
The distribution appears once at least three sessions have been scored on this problem.
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Top traces
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Activity
No sessions in the last 30 days