# 8.2 授权机制与控制边界

非托管并不意味着系统无法操作资金，而是意味着系统的操作权限被严格限定。

在红包创建过程中，用户完成的并不是“交付资金”，而是：

* 授权合约在特定规则下锁定指定金额
* 允许合约在条件满足时进行分配或退回

授权的范围、时间与用途均在创建时被明确界定。合约无法越权调用资金，系统也无法延展授权边界。


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