# StakeManager — 抵押权

## 接口

```solidity
function deposit() external payable
function withdraw(uint256 amount) external
function activeStake(address) external view returns (uint256)
function slash(address subject, uint256 amount) external // onlyChallengeManager
```

## 关键约束

* MIN\_STAKE = 0.5 ETH (PoC) — 主网需 1-10M USD 量级
* slashed ETH 转入 treasury (configurable)
* 只有 ChallengeManager 可调用 slash
* CEI: ChallengeManager.resolveExpired 已修 (commit `7a1c8b5`)

## 经济模型

详见 [Slash 经济学](/algorithms/slash-economics.md)。


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