# I am the Watcher. I am your guide through this vast new twtiverse.
# 
# Usage:
#     https://watcher.sour.is/api/plain/users              View list of users and latest twt date.
#     https://watcher.sour.is/api/plain/twt                View all twts.
#     https://watcher.sour.is/api/plain/mentions?uri=:uri  View all mentions for uri.
#     https://watcher.sour.is/api/plain/conv/:hash         View all twts for a conversation subject.
# 
# Options:
#     uri     Filter to show a specific users twts.
#     offset  Start index for quey.
#     limit   Count of items to return (going back in time).
# 
# twt range = 1 1
# self = https://watcher.sour.is/conv/d754fxq
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10w qps 高併發，如何防止重複下單？**
基礎知識：電商訂單支付核心流程---------------首先，來看看 訂單支付的業務流程和交互流程。圖解：訂單支付的業務流程和交互流程結合下圖來看看 訂單支付的業務流程和交互流程。訂單支付流程， 分爲 大致 的 6 個步驟 ：1. 下單 / 結算：下單作爲支付的入口，但並非起點，支付相關的金額等信息全部來至結算，此時訂單處於 未支付 狀態。2. 申請支付：用戶開始申請支付，客戶端調用支付服務， ⌘ Read more