> For the complete documentation index, see [llms.txt](https://doc.cryptostone.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.cryptostone.org/crypto-stone/crypto-stone-wp-cn/xie-yi-jia-gou/36-suo-cang-zhe-jiu-yu-fan-huan-jie-gou.md).

# 36. 锁仓与返还结构

当用户选择锁仓期限并将 `STONX` 投入挖矿池时，在锁仓结束后 `unstake` 时，会根据锁仓期限销毁一部分 `STONX` 作为折旧，并返还剩余 `STONX`。

| Lock Type   | Lock Period | Mining Multiplier | Maturity Burn | Returned STONX | Cooldown |
| ----------- | ----------- | ----------------- | ------------- | -------------- | -------- |
| Flexible    | 无           | 1.00x             | 0%            | 100%           | 7 days   |
| Short Lock  | 90 天        | 1.05x             | 2.5%          | 97.5%          | 无        |
| Medium Lock | 180 天       | 1.12x             | 5%            | 95%            | 无        |
| Long Lock   | 365 天       | 1.25x             | 10%           | 90%            | 无        |

当用户 *i* 质押的 `STONX` 数量为 $s\_i$，锁仓期限对应的折旧率为 $\delta\_i$ 时，到期时被销毁的 `STONX` 数量 $M\_i$ 定义如下。

$$
M\_i = s\_i \times \delta\_i
$$

返还的 `STONX` 数量 $R\_i$ 如下。

$$
R\_i = s\_i - M\_i
$$

该结构在为长期参与者提供更高 Mining Power 的同时，也反映了挖矿资源使用所产生的成本。也就是说，用户可以选择更长锁仓以获得更高挖矿速度，但在锁仓结束时需要接受更高的折旧销毁。

长期锁仓并非强制条件。不希望承担 `STONX` 销毁负担的用户可以选择 Flexible 方式。长期锁仓是为希望获得更高 Mining Power 的参与者设计的选择性结构，折旧则可被理解为伴随该选择而产生的数字挖矿资源使用成本。

开发者认为，这一结构不应被单纯理解为惩罚，而应被理解为“数字挖矿设备使用所产生的折旧”。正如现实挖矿设备会随使用时间磨损一样，在 CryptoStone 中，`STONX` 在投入挖矿池期间提供 Mining Power，并根据使用期限有一部分被销毁。


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