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System Design: Building a Bulletproof Payment Gateway! 🚀 Basic payment setups fail during network timeouts. To block catastrophic duplicate charges, enforce client-generated idempotency keys (UUIDs). The server saves this key first; if a duplicate request arrives, it immediately returns the cached result instead of re-charging the buyer. Never overwrite database rows to update payment statuses. Instead, implement an immutable ledger where every state change—authorized, captured, or refunded—cre

🚨 𝐄𝐗𝐂𝐋𝐔𝐒𝐈𝐕𝐄: 𝐄𝐑𝐋𝐈𝐍𝐆 𝐇𝐀𝐀𝐋𝐀𝐍𝐃 𝐂𝐀𝐌𝐏 𝐃𝐄𝐍𝐘 𝐀𝐍𝐘 𝐀𝐆𝐑𝐄𝐄𝐌𝐄𝐍𝐓 𝐖𝐈𝐓𝐇 𝐑𝐄𝐀𝐋 𝐌𝐀𝐃𝐑𝐈𝐃 ⛔️🇳🇴 “All very entertaining but 𝐍𝐎𝐓 true... we wish all the best for both candidates in the Madrid elections”, father Alfie Haaland and agent Rafaela Pimenta announce in 𝐞𝐱𝐜𝐥𝐮𝐬𝐢𝐯𝐞 𝐬𝐭𝐚𝐭𝐞𝐦𝐞𝐧𝐭. Enrique Riquelme had announced tonight that Erling Haaland will become Real Madrid player — if he wins the elections ⚠️ #RealMadrid #Haaland #Real #Madrid #here

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