# ECDSA 签名验证

## 标准

* 曲线: secp256k1
* 签名长度: 65 bytes (r || s || v)
* 消息前缀: EIP-191 `\x19Ethereum Signed Message:\n32`
* 实现库: OpenZeppelin 5.6.1 `ECDSA.tryRecover()`

## 用在哪里

* **EcdsaInferenceVerifier** — 验签 inference attestor
* **PoBRegistry.submitBatch** — 验 aggregator batch sig
* **ChallengeManager.open** — 隐含通过 PositionalMerkleProof
* **L2BridgeContract** — message 签名

## 关键约束

* High-s malleability rejection (OZ tryRecover 默认拒绝)
* Chain ID 绑入 EIP-712 typed data → 防 cross-chain replay
* 主网前需评估 BLS12-381 swap (post-quantum readiness)

## 已修 finding

无（slither + manual review 全过）。

## 测试

`contracts/test/EcdsaInferenceVerifier.t.sol` — 多场景覆盖。


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