# Smart Contract Verification Report

**Generated:** 2025-11-01
**Purpose:** Verify all deployed MEV bot contracts on Arbiscan
**Network:** Arbitrum One (Chain ID: 42161)

---

## Deployed Contracts Requiring Verification

### Core Execution Contracts

#### 1. Arbitrage Executor
- **Address:** `0x6C2B1c6Eb0e5aB73d8C60944c74A62bfE629c418`
- **Contract:** `ProductionArbitrageExecutor.sol`
- **Purpose:** Main arbitrage execution logic with flash swap support
- **Status:** ⏳ Pending Verification
- **Verification Command:**
```bash
export ARBISCAN_API_KEY="your_key_here"
./scripts/verify-contracts.sh 0x6C2B1c6Eb0e5aB73d8C60944c74A62bfE629c418 ProductionArbitrageExecutor
```

#### 2. Uniswap V3 Flash Swapper
- **Address:** `0x7Cc97259cBe0D02Cd0b8A80c2E1f79C7265808b4`
- **Contract:** Uniswap V3 flash swap implementation
- **Purpose:** Execute flash swaps on Uniswap V3 pools
- **Status:** ⏳ Pending Verification

#### 3. Data Fetcher Contract
- **Address:** `0xC6BD82306943c0F3104296a46113ca0863723cBD`
- **Contract:** Batch pool data fetcher
- **Purpose:** 99% RPC call reduction through batch queries
- **Status:** ⏳ Pending Verification

#### 4. Uniswap V2 Flash Swapper
- **Address:** `0xE82c24b3fD47995E0626b1e8ac13E13130f5AeEE`
- **Contract:** Uniswap V2 flash swap implementation
- **Purpose:** Execute flash swaps on Uniswap V2 pools
- **Status:** ⏳ Pending Verification

#### 5. Legacy Flash Swapper
- **Address:** `0x5801ee5c2f6069e0f11cce7c0f27c2ef88e79a95`
- **Contract:** Legacy flash swapper (points to V3)
- **Purpose:** Backward compatibility
- **Status:** ⏳ Pending Verification

#### 6. Flash Loan Receiver
- **Address:** `0xe7f1725E7734CE288F8367e1Bb143E90bb3F0512`
- **Contract:** `FlashLoanReceiver.sol`
- **Purpose:** Balancer flash loan receiver (0% fee)
- **Status:** ⏳ Pending Verification

---

## Verification Prerequisites

### 1. Arbiscan API Key
Get your API key from: https://arbiscan.io/myapikey

```bash
export ARBISCAN_API_KEY="YourApiKeyHere"
```

### 2. Compiler Settings
All contracts deployed with:
- **Compiler Version:** `v0.8.19+commit.7dd6d404`
- **Optimization:** Enabled (200 runs)
- **EVM Version:** Default

### 3. Constructor Arguments
Document constructor arguments used for each deployment.

---

## Verification Process

### Automated Verification Script
Use the provided script for each contract:

```bash
# Verify Arbitrage Executor
./scripts/verify-contracts.sh 0x6C2B1c6Eb0e5aB73d8C60944c74A62bfE629c418 ProductionArbitrageExecutor

# Verify Flash Loan Receiver
./scripts/verify-contracts.sh 0xe7f1725E7734CE288F8367e1Bb143E90bb3F0512 FlashLoanReceiver
```

### Manual Verification via Forge
Alternative using Forge directly:

```bash
forge verify-contract \
    --chain-id 42161 \
    --num-of-optimizations 200 \
    --watch \
    --compiler-version "v0.8.19+commit.7dd6d404" \
    --etherscan-api-key "$ARBISCAN_API_KEY" \
    "0x6C2B1c6Eb0e5aB73d8C60944c74A62bfE629c418" \
    "contracts/ProductionArbitrageExecutor.sol:ProductionArbitrageExecutor"
```

---

## Security Considerations

### Contract Audit Status
- ✅ **ReentrancyGuard:** Implemented on all critical functions
- ✅ **AccessControl:** Role-based permissions (ADMIN, EXECUTOR, EMERGENCY)
- ✅ **Pausable:** Emergency stop functionality
- ✅ **SafeERC20:** Used for all token transfers
- ✅ **Slippage Protection:** Max 5% slippage (500 basis points)
- ✅ **Pool Authorization:** Whitelist system for flash loan pools
- ✅ **Gas Price Limits:** Maximum gas price enforcement
- ✅ **Profit Thresholds:** Minimum profit validation

### Known Vulnerabilities (From Logic Audit)
**⚠️ Note:** The following vulnerabilities are in the **Go backend code**, not the smart contracts:

1. DFS path building bug (Go code)
2. Cache poisoning (Go code)
3. Slippage formula error (Go code)
4. Gas price race condition (Go code)
5. Float-to-int precision loss (Go code)
6. Handler concurrency issues (Go code)

**Smart contracts appear secure** based on code review. Issues are in the backend orchestration layer.

---

## Post-Verification Checklist

- [ ] All contracts verified on Arbiscan
- [ ] Contract source code matches deployed bytecode
- [ ] Constructor arguments documented
- [ ] ABI exported and stored in `bindings/deployed/`
- [ ] Contract addresses updated in all configs
- [ ] Security audit report updated
- [ ] Read/write functions tested via Arbiscan interface

---

## Verification Status Tracking

| Contract | Address | Status | Verification Link | Date |
|----------|---------|--------|-------------------|------|
| ArbitrageExecutor | `0x6C2B1c6...` | ⏳ Pending | - | - |
| UniswapV3FlashSwapper | `0x7Cc9725...` | ⏳ Pending | - | - |
| DataFetcher | `0xC6BD823...` | ⏳ Pending | - | - |
| UniswapV2FlashSwapper | `0xE82c24b...` | ⏳ Pending | - | - |
| LegacyFlashSwapper | `0x5801ee5...` | ⏳ Pending | - | - |
| FlashLoanReceiver | `0xe7f1725...` | ⏳ Pending | - | - |

---

## Next Steps

1. **Obtain Arbiscan API key** from https://arbiscan.io/myapikey
2. **Export API key:**
   ```bash
   export ARBISCAN_API_KEY="your_key_here"
   ```
3. **Run verification script** for each contract
4. **Document verification links** in the table above
5. **Update status** as verifications complete
6. **Test contract interactions** via Arbiscan UI

---

## Contract Interaction Examples

### Via Arbiscan (After Verification)

**Check Authorization:**
```solidity
// Read function: authorizedPools(address)
authorizedPools(0xPoolAddress) → returns bool
```

**Execute Arbitrage:**
```solidity
// Write function: executeArbitrage(address pool, bytes params)
// Requires EXECUTOR_ROLE
```

**Withdraw Profits:**
```solidity
// Write function: withdrawProfits(address token, uint256 amount)
// Requires ADMIN_ROLE
```

---

## Contact & Support

- **Arbiscan Support:** https://arbiscan.io/contactus
- **Verification Docs:** https://docs.arbiscan.io/getting-started/verifying-contracts

---

**Report Status:** In Progress
**Last Updated:** 2025-11-01