# 7.3 红包作为链上状态机

为了避免将红包理解为“多次转账的集合”，系统将其抽象为一个**完整的链上状态机**。这一抽象使红包的行为边界得以被清晰描述。

从生命周期角度看，一个红包经历以下阶段：

* **初始化阶段：**合约完成参数校验并锁定资金
* **可执行阶段：**允许领取操作发生
* **推进阶段：**随着领取次数增加，剩余状态逐步变化
* **终止阶段：**金额耗尽或时间到期
* **结算阶段：**完成最终分配或退款

这一生命周期的关键特征在于：\
**无论外部环境如何变化，红包的最终结果在创建时即已被结构性限定。**


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