# Oracle 价格喂送

## 双层架构

### L2 Push: OracleHub

* 系统合约 slot `0x8016`
* 由 admin-set operator 推送 (price, confidence, timestamp)
* staleness check (默认 60s) + deviation check (5%) + minSourceCount (3)

### L1 Pull: L1OracleReader

* 通过 zkSync Mailbox proof 拉 L1 Chainlink/Pyth 价格
* 不依赖 sequencer 是否诚实（trustless）

## 关键参数

```solidity
stalenessThreshold: 60s
deviationThreshold: 5% (500 bps)
minSourceCount: 3
```

## 主网前必备

* 多 source aggregation (Chainlink + Pyth + Uniswap V3 TWAP) — 主网必备
* Operator 多签
* Circuit breaker on emergency

详见 [多源价格聚合算法](/algorithms/multi-source-price-aggregation.md)。


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