/**

 * Hardhat 风格的部署与测试脚本（TypeScript）

 */

interface HardhatRuntime {

  network: { name: string; config: object };

  ethers: {

    getSigners(): Promise<{ address: string; provider: any }[]>;

    getContractFactory(name: string): Promise<any>;

  };

  run(task: string, args: object): Promise<any>;

}

// 模拟 hardhat run 的部署任务

async function deployToken(hre: HardhatRuntime) {

  const [deployer] = await hre.ethers.getSigners();

  console.log("Deploying with:", deployer.address);

  

  const Token = await hre.ethers.getContractFactory("ERC20Token");

  const token = await Token.deploy("MockToken", "MTK", 1000000n);

  // 在 Hardhat 网络中，部署即挖到区块

  console.log("Token deployed to:", token.address);

  return token;

}

// 测试结构：beforeEach + fixture 模式

class HardhatTestSuite {

  private async fixture(): Promise<{ token: MockToken; owner: string; user: string }> {

    const token = await deployToken(this.hre);

    const [owner, user] = (await this.hre.ethers.getSigners()).map(s => s.address);

    return { token, owner, user };

  }

  

  async testTransfer() {

    const { token, owner, user } = await this.fixture();

    const tx = await token.transfer(user, 100n);

    const receipt = await tx.wait();

    

    const balance = await token.balanceOf(user);

    console.assert(balance === 100n, "Transfer failed");

    console.log("Gas used:", receipt.gasUsed);

  }

}

// 模拟 HRE

const hre: HardhatRuntime = {

  network: { name: "hardhat", config: {} },

  ethers: {

    async getSigners() {

      return [

        { address: "0xDeployer...", provider: null },

        { address: "0xUser1...", provider: null },

        { address: "0xUser2...", provider: null },

      ];

    },

    async getContractFactory(name: string) {

      return {

        async deploy(...args: any[]) {

          return { address: "0xToken...", async transfer(to: string, amt: bigint) {

            return { wait: async () => ({ gasUsed: 52000n }) };

          }, async balanceOf(addr: string) { return 100n; }};

        }

      };

    }

  },

  async run(task, args) { return; }

};

new HardhatTestSuite(hre).testTransfer().then(() => console.log("Hardhat test passed"));

// Foundry 测试示例（Solidity 语法）

contract FoundryTest is Test {

    MockToken token;

    

    function setUp() public {

        token = new MockToken(1000000e18);

    }

    

    // 模糊测试：Foundry 自动生成 256 个随机值

    function testFuzzTransfer(address to, uint256 amount) public {

        vm.assume(to != address(0)); // 过滤无效输入

        vm.assume(amount <= token.balanceOf(address(this)));

        

        token.transfer(to, amount);

        assertEq(token.balanceOf(to), amount);

    }

    

    // 不变式测试

    function invariantTotalSupply() public {

        assertEq(token.totalSupply(), 1000000e18);

    }

}

/**

 * 模拟 Foundry 模糊测试引擎的核心逻辑

 */

interface FuzzCase {

  inputs: (bigint | string | boolean)[];

  failed: boolean;

  error?: string;

}

class FuzzEngine {

  private seed: number;

  

  constructor(seed: number = 42) { this.seed = seed; }

  

  private randomBigInt(max: bigint = 2n**256n - 1n): bigint {

    this.seed = (this.seed * 16807 + 0) % 2147483647;

    return BigInt(this.seed) % max;

  }

  

  private randomAddress(): string {

    return "0x" + Array(40).fill(0).map(() => 

      (this.randomBigInt(16n) as unknown as number).toString(16)

    ).join("");

  }

  

  fuzz<E>(

    cases: number,

    testFn: (inputs: (bigint | string)[]) => void,

    invariants: { filter: (inputs: (bigint | string)[]) => boolean }[],

  ): FuzzCase[] {

    const results: FuzzCase[] = [];

    for (let i = 0; i < cases; i++) {

      const inputs: (bigint | string)[] = [

        this.randomAddress(),

        this.randomBigInt(1000000n),

      ];

      

      // 应用不变式过滤器

      const valid = invariants.every(inv => inv.filter(inputs));

      if (!valid) { i--; continue; }

      

      try {

        testFn(inputs);

        results.push({ inputs, failed: false });

      } catch (e) {

        results.push({ inputs, failed: true, error: String(e) });

      }

    }

    return results;

  }

  

  // 最小化反例（shrinking）

  shrink(failure: FuzzCase, testFn: any, invariants: any): FuzzCase {

    // 尝试减小输入值，寻找最小失败案例

    let [addr, amount] = failure.inputs;

    let shrunk = [addr, (amount as bigint) / 2n];

    try {

      testFn(shrunk);

      return failure; // 无法缩小

    } catch {

      return { ...failure, inputs: shrunk };

    }

  }

}

// 模拟 fuzzing ERC20 transfer

const fuzzer = new FuzzEngine(42);

const results = fuzzer.fuzz(

  100,

  ([to, amount]) => {

    if (to === "0x" + "0".repeat(40)) throw new Error("Zero address not allowed");

    if ((amount as bigint) > 1000000n) throw new Error("Exceeds balance");

    // 正常逻辑

  },

  [{ filter: ([to, amount]) => (amount as bigint) <= 1000000n }],

);

const failures = results.filter(r => r.failed);

console.log(`Fuzzed 100 cases, ${failures.length} failures`);

if (failures.length > 0) {

  console.log("First failure:", failures[0].error, "inputs:", failures[0].inputs);

}

/**

 * Hardhat 主网 Fork 配置（TS 模拟，展示核心参数）

 */

interface ForkConfig {

  url: string;           // 主网 RPC（Infura / Alchemy / 自建）

  blockNumber?: number;  // 指定分叉区块，固定以获得可重复性

  enabled: boolean;

}

const forkConfig: ForkConfig = {

  url: "https://eth-mainnet.g.alchemy.com/v2/YOUR_KEY", // 需要归档访问

  blockNumber: 19000000,  // 固定在某一天的区块

  enabled: true,

};

// 启动后，你可以：

// 1. 与真实 Aave 的智能合约交互

// 2. 用 impersonate 模拟大户进行测试

// 3. 修改任何状态（不会上传）

interface ImpersonateAPI {

  // 模拟某地址的签名

  async impersonateAddress(address: string): Promise<void>;

  // 给该地址置入 ETH（本地网络）

  async setBalance(address: string, balance: bigint): Promise<void>;

}

// 示例：模拟「巨鲸」进行测试

async function testWhale(fork: ImpersonateAPI) {

  const vitalikAddr = "0xd8dA6BF26964aF9D7aEd9e03E53415D3aD4803d1";

  const aavePool = "0x87870Bca3F3fD6335C3F4ce8392D69350B4fA4e2";

  

  await fork.impersonateAddress(vitalikAddr); // 模拟 Vitalik 的签名

  await fork.setBalance(vitalikAddr, 1000n * 10n**18n); // 给 1000 ETH

  

  // 现在可以使用 "Vitalik" 的身份调用 Aave 池

  console.log("激活了 Vitalik 测试身份");

}

/**

 * 时间旅行测试：测试 Uniswap 的 7 天 TWAP

 */

interface EVMTimeTravel {

  async increaseTime(seconds: number): Promise<void>;

  async mine(): Promise<void>;

  async snapshot(): Promise<number>;

  async revert(id: number): Promise<void>;

}

async function test7DayTWAP(evm: EVMTimeTravel) {

  // 初始快照

  const snap = await evm.snapshot();

  

  // Day 0: 记录价格

  const price0 = await getPrice();

  

  // 快进 7 天（不需要等 7 天！）

  await evm.increaseTime(7 * 24 * 60 * 60); // 604,800 秒

  await evm.mine(); // 确认

  

  // Day 7: 检查 TWAP

  const twap = await get7DayTWAP();

  console.assert(twap > 0, "TWAP should accumulate 7 days");

  

  // 回滚，不影响其他测试

  await evm.revert(snap);

}

function getPrice(): Promise<number> { return Promise.resolve(1000); }

function get7DayTWAP(): Promise<number> { return Promise.resolve(990); }

// 模拟

const mockEVM: EVMTimeTravel = {

  async increaseTime(s) { console.log(`Jumped ${s}s`); },

  async mine() { console.log("Mined block"); },

  async snapshot() { return 1; },

  async revert(id) { console.log("Reverted to snapshot", id); },

};

test7DayTWAP(mockEVM).then(() => console.log("Time travel test done"));

/**

 * 单元测试核心模式：fixture + snapshot + 断言

 * 模拟 Foundry 的 fuzz 概念，用 TypeScript 实现随机测试

 */

interface UnitTestResult {

  name: string;

  passed: boolean;

  gas?: bigint;

  error?: string;

}

class ContractTestSuite {

  private tests: UnitTestResult[] = [];

  

  async test(name: string, fn: () => Promise<boolean>, gasEstimate?: bigint) {

    try {

      const pass = await fn();

      this.tests.push({ name, passed: pass, gas: gasEstimate });

      console.log(`✅ ${name}`);

    } catch (e) {

      this.tests.push({ name, passed: false, error: String(e) });

      console.log(`❌ ${name}:${e}`);

    }

  }

  

  report() {

    const passed = this.tests.filter(t => t.passed).length;

    const total = this.tests.length;

    const avgGas = this.tests

      .filter(t => t.gas !== undefined)

      .reduce((a, t) => a + (t.gas || 0n), 0n);

    console.log(`\n📊 Results: ${passed}/${total} passed`);

    console.log(`⛽ Avg gas (sampled): ${avgGas}n`);

  }

}

// 测试 ERC20 transfer 的边界情况

const suite = new ContractTestSuite();

// 基础功能

suite.test("transfer 到正常地址", async () => {

  const balance = 1000n; const amount = 200n;

  return balance - amount === 800n;

}, 52000n);

// 边界：零值

suite.test("transfer 0 金额不报错", async () => {

  return true; // 合法： transfers 0 是有效的

});

// 边界：满额

suite.test("transfer 精确等于余额", async () => {

  const balance = 100n; const amount = 100n;

  return balance >= amount;

}, 52000n);

// 边界：溢出

suite.test("transfer 超过余额应拒绝", async () => {

  const balance = 100n; const amount = 200n;

  if (amount > balance) return true; // 正确行为：拒绝

  return false;

}, 2200n); // revert 消耗较少 gas

// 随机模糊测试（简化版）

suite.test("fuzz 随机 transfer 金额 [0, 2^128]", async () => {

  for (let i = 0; i < 20; i++) {

    const balance = 1000000n;

    const amount = BigInt(Math.floor(Math.random() * 10**18));

    if (amount > balance) {

      // 应该拒绝

      continue;

    }

    // 接受，检查余额变化

  }

  return true;

});

suite.report();

// Foundry 模糊测试示例

contract InvariantTest is Test {

    MyToken token;

    

    function setUp() public {

        token = new MyToken(1_000_000e18);

    }

    

    // 状态不变式：总供给永远不变（无 burn 时）

    function invariant_totalSupply() public {

        assertEq(

            token.totalSupply(),

            1_000_000e18,

            "Total supply must be constant"

        );

    }

    

    // 状态不变式：用户余额和 = 总供给（无铸造/销毁）

    function invariant_sumBalancesEqTotal() public {

        // 需要跟踪所有 holder（简化展示）

    }

    

    // 边界模糊：随机地址和金额

    function testFuzzTransfer(address to, uint256 amount) public {

        vm.assume(to != address(0));

        vm.assume(to != address(this));

        

        uint256 fromBal = token.balanceOf(address(this));

        vm.assume(amount <= fromBal);

        

        token.transfer(to, amount);

        

        assertEq(token.balanceOf(to), amount);

        assertEq(token.balanceOf(address(this)), fromBal - amount);

    }

}

/**

 * Gas 报告分析：识别热点函数

 */

interface GasReport {

  function: string;

  calls: number;

  avgGas: bigint;

  minGas: bigint;

  maxGas: bigint;

}

function analyzeGasOptimization(report: GasReport[]): string[] {

  const bottlenecks: string[] = [];

  for (const r of report) {

    if (r.avgGas > 100000n) {

      bottlenecks.push(`${r.function}:${r.avgGas} gas — 考虑优化存储访问`);

    }

    if (r.maxGas - r.minGas > r.avgGas / 10n) {

      bottlenecks.push(`${r.function}: gas 波动大 — 检查分支逻辑`);

    }

  }

  return bottlenecks;

}

// 示例输入

const sampleReport: GasReport[] = [

  { function: "transfer", calls: 1000, avgGas: 52000n, minGas: 51500n, maxGas: 65000n },

  { function: "swap", calls: 500, avgGas: 145000n, minGas: 120000n, maxGas: 210000n },

  { function: "stake", calls: 200, avgGas: 180000n, minGas: 175000n, maxGas: 182000n },

];

console.log(analyzeGasOptimization(sampleReport));

// 输出: swap 和 stake 可能超 100K，建议审查存储写入

/**

 * CREATE2 地址计算（纯 TypeScript，EVM 等效）

 */

function computeCreate2Address(

  deployer: string,

  salt: string,

  initCodeHash: string,

): string {

  // 地址 = keccak256(0xFF + deployer(20B) + salt(32B) + initCodeHash(32B))[12:]

  const prefix = "0xFF";

  const deployerPadded = deployer.toLowerCase().replace("0x", "").padStart(40, '0');

  const saltPadded = salt.toLowerCase().replace("0x", "").padStart(64, '0');

  const hashPadded = initCodeHash.toLowerCase().replace("0x", "").padStart(64, '0');

  

  const data = prefix + deployerPadded + saltPadded + hashPadded;

  // 简化的 hash 计算（实际应用 keccak256）

  let hash = 0;

  for (let i = 0; i < data.length; i++) {

    hash = ((hash << 5) - hash + data.charCodeAt(i)) | 0;

  }

  // 取低 20 字节

  const addrHex = (hash >>> 0).toString(16).padStart(40, '0');

  return "0x" + addrHex;

}

// 示例：在以太坊和 Arbitrum 上部署到同一地址

const factory = "0x4e59b44847b379578588920cA78FbF26c0B4956C"; // 标准 CREATE2 工厂

const salt = "0x" + "42".repeat(32);

const initCodeHash = "0x" + "ab".repeat(32); // 实际为 keccak256(creationBytecode + constructorArgs)

const addrEth = computeCreate2Address(factory, salt, initCodeHash);

const addrArb = computeCreate2Address(factory, salt, initCodeHash);

console.log("Same address on both chains:", addrEth === addrArb, addrEth);

// 输出: true, 0x...（相同的地址！）

interface NetworkConfig {

  rpcUrl: string;

  chainId: number;

  verificationApi: string;

  deployed: { [contract: string]: string };

  // 安全：多签 / 硬件钱包

  deployerType: "EOA" | "GnosisSafe" | "HardwardWallet";

}

const networks: Record<string, NetworkConfig> = {

  mainnet: {

    rpcUrl: "https://eth-mainnet.g.alchemy.com/v2/...",

    chainId: 1,

    verificationApi: "https://api.etherscan.io/api",

    deployed: {},

    deployerType: "GnosisSafe",

  },

  sepolia: {

    rpcUrl: "https://eth-sepolia.g.alchemy.com/v2/...",

    chainId: 11155111,

    verificationApi: "https://api-sepolia.etherscan.io/api",

    deployed: {},

    deployerType: "EOA", // 测试网用 EOA 方便

  },

  arbitrum: {

    rpcUrl: "https://arb-mainnet.g.alchemy.com/v2/...",

    chainId: 42161,

    verificationApi: "https://api.arbiscan.io/api",

    deployed: {},

    deployerType: "GnosisSafe",

  },

  polygon: {

    rpcUrl: "https://polygon-mainnet.g.alchemy.com/v2/...",

    chainId: 137,

    verificationApi: "https://api.polygonscan.com/api",

    deployed: {},

    deployerType: "GnosisSafe",

  },

};

// 部署任务选择网络

console.log("Available networks:", Object.keys(networks).join(", "));

/**

 * 自动化验证配置（TypeScript 模拟）

 */

interface VerificationConfig {

  apiKey: string;         // Etherscan / BscScan / 等

  network: string;        // "mainnet" / "sepolia" / "arbitrum"

  contractAddress: string;

  contractName: string;

  compilerVersion: string; // e.g. "v0.8.19+commit.7dd6d404"

  optimization: boolean;

  optimizationRuns: number;

  constructorArgs: string; // ABI 编码后的构造函数参数

  sourceCode: string;      // 完整的 Solidity 源码或 flattened

}

async function verifyContract(config: VerificationConfig): Promise<boolean> {

  const apiUrl = {

    mainnet: "https://api.etherscan.io/api",

    sepolia: "https://api-sepolia.etherscan.io/api",

    arbitrum: "https://api.arbiscan.io/api",

    polygon: "https://api.polygonscan.com/api",

  }[config.network];

  // 1. 提交源码 + 编译设置

  // 2. 等待编译（30s-120s）

  // 3. 轮询状态

  // 4. 返回结果

  

  console.log(`Verifying ${config.contractName} at${config.contractAddress}...`);

  return true;

}

// 验证成功后，区块浏览器显示：

// - 完整的 Solidity 源码

// - 自动生成的 Read / Write 界面

// - 事件日志解码

// - ABI 导出

/**

 * 完美验证要求：编译输出的 metadata 完全匹配

 * metadata 包含所有编译器设置、源码路径、版本、库地址等

 */

interface CompilationMetadata {

  compiler: { version: string };

  language: string;

  output: { abi: any[]; devdoc: any; userdoc: any };

  settings: {

    compilationTarget: Record<string, string>;

    optimizer: { enabled: boolean; runs: number };

    evmVersion?: string;

    libraries?: Record<string, string>;

  };

  sources: Record<string, { content: string; keccak256: string }>;

  version: number;

}

// 完美验证 = 链上 bytecode + metadata 指纹 == 重新编译输出

function isFullMatch(

  onChainBytecode: string,

  compiledBytecode: string,

  metadata: CompilationMetadata,

): boolean {

  // metadata 末尾以 CBOR 编码嵌入编译输出的最后是 Solidity 标准

  // 这里做简化比对

  const metadataHash = JSON.stringify(metadata.settings);

  const embedded = onChainBytecode.slice(-100); // metadata hash 在末尾

  return onChainBytecode.startsWith(compiledBytecode.slice(2, 20)) &&

         embedded.includes(metadataHash.slice(0, 20));

}

/**

 * 模拟 CI 流水线中的质量关卡（gate）检查

 */

interface CIGate {

  name: string;

  check(): { pass: boolean; message: string };

}

class CIPipeline {

  private gates: CIGate[] = [];

  

  addGate(gate: CIGate) { this.gates.push(gate); }

  

  run(): { passed: boolean; results: { name: string; pass: boolean; message: string }[] } {

    const results = this.gates.map(g => ({ name: g.name, ...g.check() }));

    const passed = results.every(r => r.pass);

    return { passed, results };

  }

}

const pipeline = new CIPipeline();

// Step 1: 代码风格

pipeline.addGate({

  name: "lint",

  check() {

    // solhint 检查：无未使用变量、无危险函数

    const issues: string[] = [];

    return {

      pass: issues.length === 0,

      message: issues.length === 0 ? "✅ All clean" : `❌ ${issues.join(", ")}`,

    };

  },

});

// Step 2: 编译

pipeline.addGate({

  name: "compile",

  check() {

    return { pass: true, message: "✅ Foundry build succeeded" };

  },

});

// Step 3: 测试

pipeline.addGate({

  name: "unit-test",

  check() {

    const tests = 150; const failures = 0;

    return {

      pass: failures === 0,

      message: `✅ ${tests} tests,${failures} failed`,

    };

  },

});

// Step 4: 覆盖率

pipeline.addGate({

  name: "coverage",

  check() {

    const line = 92;

    const branch = 84;

    return {

      pass: line >= 90 && branch >= 80,

      message: `📊 Coverage: line ${line}${branch}%`,

    };

  },

});

// Step 5: 安全扫描（Slither）

pipeline.addGate({

  name: "slither",

  check() {

    const results = {

      critical: 0,

      high: 0,

      medium: 2,

      low: 5,

    };

    const pass = results.critical === 0 && results.high === 0;

    return {

      pass,

      message: pass

        ? `⚠️ Slither: ${results.medium} medium,${results.low} low`

        : `❌ ${results.critical} critical,${results.high} high findings!`,

    };

  },

});

// Step 6: Gas 快照比对

pipeline.addGate({

  name: "gas-snapshot",

  check() {

    const baseline = 1450000n;

    const current = 1462000n;

    const regression = Number((current - baseline) * 10000n / baseline) / 100;

    return {

      pass: regression < 1.0,

      message: `⛽ Gas: ${current} (+${regression}%)`,

    };

  },

});

const result = pipeline.run();

console.log(`Pipeline: ${result.passed ? "✅ PASSED" : "❌ BLOCKED"}`);

for (const r of result.results) {

  console.log(`  ${r.message} (${r.name})`);

}

## .github/workflows/slither.yml 关键片段模拟

name: Slither

on: [push, pull_request]

jobs:

  analyze:

    runs-on: ubuntu-latest

    steps:

      - uses: actions/checkout@v4

      - uses: crytic/slither-action@v0.3.0

        with:

          node-version: 16

          fail-on: 'high'  # 发现高危则阻断

          slither-args: '--filter-paths "node_modules|test"'