Guide for fullstack developers on integrating payment gateways (e.g., Stripe) and handling webhooks securely. Explains what gateways do, why webhooks matter for real-time updates, error handling, and fraud prevention, then outlines setup steps (SDKs, forms, webhook endpoints, signature verification) and best practices (HTTPS, idempotence, logging, thorough testing), with an EduPro case study.
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