# Bridge 跨链桥 + Fast Withdrawal

## 标准 Bridge

* **L1BridgeContract.sol** (deploy on Ethereum L1)
* **L2BridgeContract.sol** (deploy on AxBlade L2)
* 通过 zkSync Mailbox 传 message
* 标准 deposit / withdrawal 通过 7 天 challenge window

## Fast Withdrawal (V2)

* **FastWithdrawalPoolV2.sol** — LP 抵押 ETH/USDC，提供秒级提现
* 用户支付小额费用换"立即拿到 L1 资金"，不等 7 天
* LP 在 7 天后从 bridge 拿回本金 + 手续费

## 主网前必备

* LP TVL 至少 $1-10M 才能开 fast lane
* KYC/AML for LP
* 多 source price feed (避免 LP 被 oracle 操纵)

详见 `contracts/src/bridge/`。


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