temp

Author: leoliew

w5_1_code/package.json

@@ -1,5 +1,5 @@
 {
-  "name": "w4_2_code",
+  "name": "w5_1_code",
   "version": "1.0.0",
   "description": "",
   "main": "index.js",

w5_2_code/package.json

@@ -1,5 +1,5 @@
 {
-  "name": "w4_2_code",
+  "name": "w5_2_code",
   "version": "1.0.0",
   "description": "",
   "main": "index.js",

w6_1_code/.envrc.example

@@ -0,0 +1,4 @@
+export RINKEBY_ALCHEMY_URL=''
+export KOVAN_ALCHEMY_URL=''
+export PRIVATE_KEY=''
+export ETHERSCAN_API_KEY=''

w6_1_code/README.md

@@ -0,0 +1,20 @@
+## 测试
+- 先往 aave 合约存入 busd，用于支付借贷产生的利息，然后进行借贷
+
+## 交易流水
+[0xfb7f2ae1d852fb0b1a4a931abe443dcfe15ec852a3c3575d10cc37d203c28fe1](https://kovan.etherscan.io/tx/0xfb7f2ae1d852fb0b1a4a931abe443dcfe15ec852a3c3575d10cc37d203c28fe1)
+
+## 相关代码
+- [AaveFlashLoan](https://github.com/leoliew/blockchain-learn/blob/main/w5_2_code/contracts/AaveFlashLoan.sol)
+- [testFlashLoan](https://github.com/leoliew/blockchain-learn/blob/main/w5_2_code/scripts/testFlashLoan.js)
+
+## 截图
+- 测试网执行
+
+![image1](../images/w5_2_1.jpeg)
+
+- 本地调试
+
+![image2](../images/w5_2_2.png)
+
+![image2](../images/w5_2_3.png)

w6_1_code/contracts/CallOptionsToken.sol

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+//SPDX-License-Identifier: Unlicense
+pragma solidity ^0.8.0;
+
+import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
+import "@openzeppelin/contracts/access/Ownable.sol";
+import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
+
+// ETH Call Opt
+contract CallOptionsToken is ERC20, Ownable {
+    using SafeERC20 for IERC20;
+
+    uint public price;
+    address public udscToken;
+    uint public settlementTime; // 行权日期
+    uint public constant during = 1 days; // 行权有效期
+
+    constructor(address usdc) ERC20("CallOptToken", "COPT") {
+        udscToken = usdc;
+        price = 10;
+        settlementTime = 100 days;
+    }
+
+    // 铸造期权 token
+    function mint() external payable onlyOwner {
+        _mint(msg.sender, msg.value);
+    }
+
+    // 行权
+    function settlement(uint amount) external {
+        require(block.timestamp >= settlementTime && block.timestamp < settlementTime + during, "invalid time");
+        _burn(msg.sender, amount);
+        uint needUsdcAmount = price * amount;
+        IERC20(udscToken).safeTransferFrom(msg.sender, address(this), needUsdcAmount);
+        safeTransferETH(msg.sender, amount);
+    }
+
+
+    function safeTransferETH(address to, uint256 value) internal {
+        (bool success,) = to.call{value : value}(new bytes(0));
+        require(success, 'TransferHelper::safeTransferETH: ETH transfer failed');
+    }
+
+    // 销毁合约
+    function burnAll() external onlyOwner {
+        require(block.timestamp >= settlementTime + during, "not end");
+        uint usdcAmount = IERC20(udscToken).balanceOf(address(this));
+        IERC20(udscToken).safeTransfer(msg.sender, usdcAmount);
+
+        selfdestruct(payable(msg.sender));
+        // uint ethAmount = address(this).balance;
+        // safeTransferETH(msg.sender, ethAmount);
+    }
+
+
+}

w6_1_code/deploy/deploy.js

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+// We require the Hardhat Runtime Environment explicitly here. This is optional
+// but useful for running the script in a standalone fashion through `node <script>`.
+//
+const { ethers } = require('hardhat')
+// When running the script with `npx hardhat run <script>` you'll find the Hardhat
+// Runtime Environment's members available in the global scope.
+module.exports = async (hardhat) => {
+
+  const { deployments } = hardhat
+  const { deploy } = deployments
+
+  const [signer1] = await hardhat.ethers.getSigners()
+  // kovan测试网地址
+  const ADDRESS_PROVIDER = '0x88757f2f99175387ab4c6a4b3067c77a695b0349'
+  let aaveFlashLoan = await deploy('AaveFlashLoan', {
+    contract: 'AaveFlashLoan',
+    args: [ADDRESS_PROVIDER],
+    from: signer1.address,
+    skipIfAlreadyDeployed: false
+  })
+  console.log('AaveFlashLoan:' + aaveFlashLoan.address)
+}

w6_1_code/hardhat.config.js

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+require('@nomiclabs/hardhat-waffle')
+require('@nomiclabs/hardhat-ethers')
+require('@nomiclabs/hardhat-etherscan')
+require('hardhat-deploy')
+require('hardhat-deploy-ethers')
+
+// You need to export an object to set up your config
+// Go to https://hardhat.org/config/ to learn more
+
+const { RINKEBY_ALCHEMY_URL, KOVAN_ALCHEMY_URL, PRIVATE_KEY, ETHERSCAN_API_KEY } = process.env
+
+/**
+ * @type import('hardhat/config').HardhatUserConfig
+ */
+module.exports = {
+  solidity: '0.8.4',
+
+  networks: {
+    localhost: {
+      url: 'http://127.0.0.1:8545',
+      chainId: 31337
+    },
+    forking: {
+      url: 'http://127.0.0.1:8545',
+      chainId: 31337,
+      accounts: [`0x${PRIVATE_KEY}`],
+      blockNumber: 30834337 // kovan 测试网区块高度
+    },
+    kovan: {
+      chainId: 42,
+      url: KOVAN_ALCHEMY_URL,
+      accounts: [`0x${PRIVATE_KEY}`]
+    }
+  },
+  etherscan: {
+    apiKey: {
+      kovan: ETHERSCAN_API_KEY
+    }
+  }
+}