DrawLint.aiMedium✦ Official
45 minPayment System
Design a digital payment processing system with exactly-once processing, multiple payment methods, and compliance.
These requirements and scale numbers are for reference. The AI reviewer will evaluate your design based on the functional requirements and assumptions you define.
🎯 Key Requirements
- •Process card and wallet payments end-to-end (auth → capture → settle)
- •Idempotent processing — no double charges on client retry
- •Refunds and a basic reconciliation / audit trail
📐 Scale Expectations
- •~100 transactions per second at peak
- •Transaction completes within 2 seconds end-to-end
- •99.99% success rate; zero double charges
🔗 Related Topics
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