# 5.1 红包生命周期的定义

为了保证红包行为在任何场景下都具有一致、可预测的结果，马上领红包在系统层面对红包引入了明确的生命周期模型。

一个红包从创建到终结，必须且只会经历以下阶段：

1. **创建（Created）**\
   红包参数被确定，相关资金被锁定。
2. **发送（Sent）**\
   红包被绑定到具体的群聊或接收环境中。
3. **领取（Claiming）**\
   群成员根据规则进行领取操作。
4. **结算（Settled）**\
   红包被完全领取或达到终止条件。
5. **退回（Refunded）**\
   未领取部分按规则自动返还。

该生命周期在红包创建时即被确定，后续所有行为只能在既定路径内发生，避免出现“例外处理”或人为干预。


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