数字钱包管理工具：加密资产的终极保险箱

// 使用BIP-39+44+85标准构建多链HD钱包
import { HDNodeWallet, Mnemonic } from "ethers";

// 硬件级助记词生成（需HSM支持）
const mnemonic = Mnemonic.fromEntropy(hsm.generateSecureEntropy(256)); 

// 分层派生路径（兼容EVM/Solana/Cosmos）
const paths = {
  eth: "m/44'/60'/0'/0",
  sol: "m/44'/501'/0'", 
  atom: "m/44'/118'/0'/0"
};

// 分片存储加密（Shamir Secret Sharing）
const shards = SSS.split(mnemonic.phrase, {
  shares: 5,
  threshold: 3 // 3/5碎片可复原
});

shards.forEach(shard => 
  awsKMS.encrypt(shard, { KeyId: HSM_KEY_ARN })
);

def calculate_cross_chain_route(user_op: UserOperation):
    chains = detect_chains(user_op.assets)
    
    # 动态获取Gas数据源
    gas_data = {
        'ethereum': eth_gas_station.get_prediction(),
        'solana': solana_fee_calculator.get_priority_fee(),
        'arbitrum': orbit_sdk.estimate_l2_fee()
    }
    
    # 路径寻优算法（考虑时延/成本/安全性）
    routes = []
    for bridge in available_bridges:
        route = {
            "cost": sum(gas_data[c] for c in bridge.chains),
            "time": bridge.estimate_time(),
            "security": bridge.audit_score
        }
        routes.append(route)
    
    return optimize(routes, weights=user_op.prefs)  # 用户偏好权重

# 集成到前端交易流
@app.route('/send-tx', methods=['POST'])
def handle_tx():
    user_op = parse_request(request)
    optimal_route = calculate_cross_chain_route(user_op)
    return render_transaction_preview(optimal_route)  # 可视化展示路径

// 恶意合约检测器（基于Slither规则扩展）
contract RiskScanner {
    function detectMaliciousApproval(address _contract) public returns (RiskLevel) {
        // 规则1：检查无限授权
        if (IERC20(_contract).allowance(address(this), spender) == type(uint256).max) {
            return RiskLevel.CRITICAL;
        }
        
        // 规则2：检测隐蔽后门（如call注入）
        bytes memory code = _contract.code;
        if (containsHiddenCall(code)) {
            return RiskLevel.HIGH;
        }
        
        // 规则3：模拟资金流向
        SimResult memory res = txSimulator.simulate(
            _contract, 
            msg.sender.balance
        );
        if (res.external_transfers > 3) {
            return RiskLevel.MEDIUM;
        }
    }
}

// 前端集成示例
import { useSimulateTx } from '@safe-global/tx-simulator'

function TransactionButton() {
  const { simulate } = useSimulateTx()
  
  const handleSend = async () => {
    const risk = await simulate(txData)
    if (risk.level > RiskLevel.LOW) {
      showVisualization(risk.flowChart) // 展示资金流向图
      requireMultiSig() // 触发多签审批
    }
  }
}

graph LR
  A[用户意图] --> B(AI代理)
  B --> C{安全策略引擎}
  C --> D[自动路径规划]
  C --> E[风险模拟]
  D --> F[硬件签名]
  E -->|风险>阈值| G[多签审批]

class AIGuardian:
    def __init__(self, user_profile):
        self.llm = FineTunedGPT(user.security_profile)
    
    def process_intent(self, user_command: str):
        # 语义解析用户意图
        intent = self.llm.parse(f"Convert to tx: {user_command}")
        
        # 自动生成最优交易方案
        tx_plan = self.optimizer.generate(intent)
        
        # 实时风险扫描
        if RiskScanner.score(tx_plan) > 0.7:
            return self.request_human_approval(tx_plan)
        
        return tx_plan

# 用户场景示例
agent = AIGuardian(user_profile="defi_whale")
tx = agent.process_intent("卖50% ETH买MKR，存进Aave v3")