Idempotency Keys: How to Make API Retries Safe
How idempotency keys stop double charges when clients retry: the design, a PostgreSQL and Node.js implementation, edge cases and idempotent consumers.
API Design articles
2 articles about API Design, written from hands-on experience building and scaling production systems.
- 6 min
- 7 min
Rate Limiting Algorithms Explained: Token Bucket to Sliding Window
Fixed window, sliding window, token bucket and leaky bucket rate limiters explained, with atomic Redis Lua implementations and proper 429 responses.
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