for sepolia test

basic/11-react-express-hardhat/README-CN.md

@@ -9,6 +9,8 @@
 
 ```shell
 yarn
+
+#Node 版本： v20.11.0
 ```
 
 - 选择创建一个简单的项目。添加一个名为 SimpleToken.sol 的合约到 ./contracts, 编译此合约并且运行测试
@@ -21,7 +23,7 @@ npx hardhat test
 - 部署
 
 ```shell
-npx hardhat run scripts/deploy.js --network goerli
+npx hardhat run scripts/deploy.js --network sepolia
 ```
 
 - 找到你的本地节点账户的私有 key 以及 token 地址，导入到 Metamask 中

basic/11-react-express-hardhat/README.md

@@ -9,6 +9,8 @@
 
 ```shell
 yarn
+
+#Node Version: v20.11.0
 ```
 
 - Create a simple project selected. Add contract names SimpleToken.sol to ./contracts and compile the contract to run testing.
@@ -34,10 +36,11 @@ yarn
 node app.js
 ```
 
-- Startup react
+- Startup react （open new terminal)
 
 ```shell
 cd frontend
+#Please ensure that it is already present the HARDHAT_NETWORK_ ID in src/components/Dapp.js has been modified to the corresponding network ID
 yarn
 yarn start
 ```

basic/11-react-express-hardhat/frontend/src/components/Dapp.js

@@ -24,8 +24,8 @@ import { receipt_create, receipt_list} from '../api.js'
 // This is the Hardhat Network id, you might change it in the hardhat.config.js
 // Here's a list of network ids https://docs.metamask.io/guide/ethereum-provider.html#properties
 // to use when deploying to other networks.
-const HARDHAT_NETWORK_ID = "42";
 
+const HARDHAT_NETWORK_ID = "11155111"; //sepolia network ID
 // This is an error code that indicates that the user canceled a transaction
 const ERROR_CODE_TX_REJECTED_BY_USER = 4001;
 

basic/11-react-express-hardhat/hardhat.config.js

@@ -33,17 +33,13 @@ module.exports = {
         (you can put in a mnemonic here to set the deployer locally)
       */
     },
-    goerli: {
-      url: 'https://goerli.infura.io/v3/' + process.env.INFURA_ID, //<---- YOUR INFURA ID! (or it won't work)
+    sepolia: {
+      url: 'https://sepolia.infura.io/v3/' + process.env.INFURA_ID, //<---- YOUR INFURA ID! (or it won't work)
       accounts: [mnemonic()],
     },
     mainnet: {
       url: 'https://mainnet.infura.io/v3/' + process.env.INFURA_ID, //<---- YOUR INFURA ID! (or it won't work)
       accounts: [mnemonic()],
     },
-    ropsten: {
-      url: 'https://ropsten.infura.io/v3/' + process.env.INFURA_ID, //<---- YOUR INFURA ID! (or it won't work)
-      accounts: [mnemonic()],
-    },
   },
 };

basic/12-token-crowdfund/hardhat.config.js

@@ -44,17 +44,13 @@ module.exports = {
         (you can put in a mnemonic here to set the deployer locally)
       */
     },
-    goerli: {
-      url: 'https://goerli.infura.io/v3/' + process.env.INFURA_ID, //<---- YOUR INFURA ID! (or it won't work)
+    sepolia: {
+      url: 'https://sepolia.infura.io/v3/' + process.env.INFURA_ID, //<---- YOUR INFURA ID! (or it won't work)
       accounts: [mnemonic()],
     },
     mainnet: {
       url: 'https://mainnet.infura.io/v3/' + process.env.INFURA_ID, //<---- YOUR INFURA ID! (or it won't work)
       accounts: [mnemonic()],
     },
-    ropsten: {
-      url: 'https://ropsten.infura.io/v3/' + process.env.INFURA_ID, //<---- YOUR INFURA ID! (or it won't work)
-      accounts: [mnemonic()],
-    },
   },
 };