Error: Error: could not detect network (event="noNetwork", code=NETWORK_ERROR, version=providers/5.7.2)

[Jatin40]

Please help for resolving this issue

PS C:\Users\Jatin\ether-simple-storage> node deploy.js
hi
Deploying, please wait...
Error: Error: could not detect network (event="noNetwork", code=NETWORK_ERROR, version=providers/5.7.2)
at Logger.makeError (C:\Users\Jatin\ether-simple-storage\node_modules@ethersproject\logger\lib\index.js:238:21)
at Logger.throwError (C:\Users\Jatin\ether-simple-storage\node_modules@ethersproject\logger\lib\index.js:247:20)
at JsonRpcProvider. (C:\Users\Jatin\ether-simple-storage\node_modules@ethersproject\providers\lib\json-rpc-provider.js:609:54)
at step (C:\Users\Jatin\ether-simple-storage\node_modules@ethersproject\providers\lib\json-rpc-provider.js:48:23)
at Object.throw (C:\Users\Jatin\ether-simple-storage\node_modules@ethersproject\providers\lib\json-rpc-provider.js:29:53)
at rejected (C:\Users\Jatin\ether-simple-storage\node_modules@ethersproject\providers\lib\json-rpc-provider.js:21:65)
at process.processTicksAndRejections (node:internal/process/task_queues:95:5) {
reason: 'could not detect network',
code: 'NETWORK_ERROR',
event: 'noNetwork'
}

this is my solidity code
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

contract SimpleStorage {
uint256 favoriteNumber;

struct People {
    uint256 favoriteNumber;
    string name;
}

People[] public people;
mapping(string => uint256) public nameToFavoriteNumber;

function store(uint256 _favoriteNumber) public {
    favoriteNumber = _favoriteNumber;
}

function retrieve() public view returns (uint256) {
    return favoriteNumber;
}

function addPerson(string memory _name, uint256 _favoriteNumber) public {
    people.push(People(_favoriteNumber, _name));
    nameToFavoriteNumber[_name] = _favoriteNumber;
}

}

this is my hardhat config-
require("@nomicfoundation/hardhat-toolbox");

/** @type import('hardhat/config').HardhatUserConfig */
module.exports = {
solidity: "0.8.18",
networks: {
matic: {
url: 'HTTP://127.0.0.1:7545',
accounts: '0xa837cac667cf0640a53536df19d895d9f18b32abd4ad655e9347f5c71f0fd712',
gas: 8000000, // Increase the gas limit
gasPrice: 20000000000
}
// Add other network configurations as needed
},
};

this is deploy.js
const { ethers, JsonRpcProvider } = require('ethers');

const fs = require("fs-extra");

async function main() {
try {
console.log("hi");

// Define the Ethereum RPC provider URL (http://127.0.0.1:7545 for a local development network)
const provider = new ethers.providers.JsonRpcProvider("HTTP://172.28.16.1:7545");

// Replace with your actual private key
const privateKey = "0x2af3338bf0afd9b8689d36e92e3c9f2ed6f7d4d806230d99f758994b7ee79813";

// Create a wallet using the provided private key and the Ethereum provider
const wallet = new ethers.Wallet(privateKey, provider);

// Read the ABI and binary data from files
const abi = fs.readFileSync("./SimpleStorage_sol_SimpleStorage.abi", "utf-8");
const binary = fs.readFileSync("./SimpleStorage_sol_SimpleStorage.bin", "utf-8");

// Create a contract factory using the ABI, binary, and wallet
const contractFactory = new ethers.ContractFactory(abi, binary, wallet);
console.log("Deploying, please wait...");

// Deploy the contract
const contract = await contractFactory.deploy();
await contract.deployed();

console.log("Contract deployed at address:", contract.address);

} catch (error) {
console.error("Error:", error);
process.exit(1);
}
}

main()
.then(() => process.exit(0))
.catch((error) => {
console.error(error);
process.exit(1);
});

[tusharr1411]

I think you are using Ganache Application for your network connection. Please make sure ganache app is running while you are are trying to deploy... and you have to updae yourprivate key in your code for ganache network connection whenever you closed Ganache. The private keys provided by ganache are not permanent. Once you closed the Ganache Application the private keys become invalid.... Ganache provides new private keys everytime you relaunch the ganache.

You can also use ganache in terminal...
In a new terminal type : ganache and hit enter. This will run ganache server in your terminal. Here you will get some accounts and private keys for development. You can use these private keys al long as this ganache server is running in your terminal.

[Jatin40]

Thanks
The issue is resolved

[tusharr1411]

Glad to know !. Please mark as answer if it helped you.