当我运行“truffle migrate”时，出现连接错误。 我为本地主机尝试了这些端口，但没有任何改变！
错误：
> Something went wrong while attempting to connect to the network at http://127.0.0.1:24012. Check your network configuration.
CONNECTION ERROR: Couldn't connect to node http://127.0.0.1:24012.
Truffle v5.7.9 (core: 5.7.9)
Node v18.14.2
2 个合约创建：
2 创建的迁移：
truffle-config.js 也已创建。我的配置：
/**
* Use this file to configure your truffle project. It's seeded with some
* common settings for different networks and features like migrations,
* compilation, and testing. Uncomment the ones you need or modify
* them to suit your project as necessary.
*
* More information about configuration can be found at:
*
* https://trufflesuite.com/docs/truffle/reference/configuration
*
* Hands-off deployment with Infura
* --------------------------------
*
* Do you have a complex application that requires lots of transactions to deploy?
* Use this approach to make deployment a breeze 🏖️:
*
* Infura deployment needs a wallet provider (like @truffle/hdwallet-provider)
* to sign transactions before they're sent to a remote public node.
* Infura accounts are available for free at 🔍: https://infura.io/register
*
* You'll need a mnemonic - the twelve word phrase the wallet uses to generate
* public/private key pairs. You can store your secrets 🤐 in a .env file.
* In your project root, run `$ npm install dotenv`.
* Create .env (which should be .gitignored) and declare your MNEMONIC
* and Infura PROJECT_ID variables inside.
* For example, your .env file will have the following structure:
*
* MNEMONIC = <Your 12 phrase mnemonic>
* PROJECT_ID = <Your Infura project id>
*
* Deployment with Truffle Dashboard (Recommended for best security practice)
* --------------------------------------------------------------------------
*
* Are you concerned about security and minimizing rekt status 🤔?
* Use this method for best security:
*
* Truffle Dashboard lets you review transactions in detail, and leverages
* MetaMask for signing, so there's no need to copy-paste your mnemonic.
* More details can be found at 🔎:
*
* https://trufflesuite.com/docs/truffle/getting-started/using-the-truffle-dashboard/
*/
// require('dotenv').config();
// const { MNEMONIC, PROJECT_ID } = process.env;
// const HDWalletProvider = require('@truffle/hdwallet-provider');
module.exports = {
/**
* Networks define how you connect to your ethereum client and let you set the
* defaults web3 uses to send transactions. If you don't specify one truffle
* will spin up a managed Ganache instance for you on port 9545 when you
* run `develop` or `test`. You can ask a truffle command to use a specific
* network from the command line, e.g
*
* $ truffle test --network <network-name>
*/
networks: {
// Useful for testing. The `development` name is special - truffle uses it by default
// if it's defined here and no other network is specified at the command line.
// You should run a client (like ganache, geth, or parity) in a separate terminal
// tab if you use this network and you must also set the `host`, `port` and `network_id`
// options below to some value.
//
development: {
host: "127.0.0.1", // Localhost (default: none)
port: 24012, // Standard Ethereum port (default: none) // Port changed to 8545 too but it doesn't work!
network_id: "*", // Any network (default: none)
},
test: {
host: "127.0.0.1",
port: 7545,
network_id: "*"
}
//
// An additional network, but with some advanced options…
// advanced: {
// port: 8777, // Custom port
// network_id: 1342, // Custom network
// gas: 8500000, // Gas sent with each transaction (default: ~6700000)
// gasPrice: 20000000000, // 20 gwei (in wei) (default: 100 gwei)
// from: <address>, // Account to send transactions from (default: accounts[0])
// websocket: true // Enable EventEmitter interface for web3 (default: false)
// },
//
// Useful for deploying to a public network.
// Note: It's important to wrap the provider as a function to ensure truffle uses a new provider every time.
// goerli: {
// provider: () => new HDWalletProvider(MNEMONIC, `https://goerli.infura.io/v3/${PROJECT_ID}`),
// network_id: 5, // Goerli's id
// confirmations: 2, // # of confirmations to wait between deployments. (default: 0)
// timeoutBlocks: 200, // # of blocks before a deployment times out (minimum/default: 50)
// skipDryRun: true // Skip dry run before migrations? (default: false for public nets )
// },
//
// Useful for private networks
// private: {
// provider: () => new HDWalletProvider(MNEMONIC, `https://network.io`),
// network_id: 2111, // This network is yours, in the cloud.
// production: true // Treats this network as if it was a public net. (default: false)
// }
},
// Set default mocha options here, use special reporters, etc.
mocha: {
// timeout: 100000
},
// Configure your compilers
compilers: {
solc: {
version: "0.5.0", // Fetch exact version from solc-bin (default: truffle's version)
// docker: true, // Use "0.5.1" you've installed locally with docker (default: false)
// settings: { // See the solidity docs for advice about optimization and evmVersion
// optimizer: {
// enabled: false,
// runs: 200
// },
// evmVersion: "byzantium"
// }
}
},
// Truffle DB is currently disabled by default; to enable it, change enabled:
// false to enabled: true. The default storage location can also be
// overridden by specifying the adapter settings, as shown in the commented code below.
//
// NOTE: It is not possible to migrate your contracts to truffle DB and you should
// make a backup of your artifacts to a safe location before enabling this feature.
//
// After you backed up your artifacts you can utilize db by running migrate as follows:
// $ truffle migrate --reset --compile-all
//
// db: {
// enabled: false,
// host: "127.0.0.1",
// adapter: {
// name: "indexeddb",
// settings: {
// directory: ".db"
// }
// }
// }
};