Lesson 5 (Ganache & Networks): NETWORK_ERROR

[Beefy-py]

When I run node deploy.js I get the following error:

TypeError: Cannot read properties of undefined (reading 'JsonRpcProvider')
    at main (/home/kenny/hh-fcc/ethers-simple-storage-fcc/deploy.js:5:41)
    at Object.<anonymous> (/home/kenny/hh-fcc/ethers-simple-storage-fcc/deploy.js:23:1)
    at Module._compile (node:internal/modules/cjs/loader:1241:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1295:10)
    at Module.load (node:internal/modules/cjs/loader:1091:32)
    at Module._load (node:internal/modules/cjs/loader:938:12)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:83:12)
    at node:internal/main/run_main_module:23:47

I then checked ethers' docs and I saw the for version six, ethers is imported like so import {ethers} from 'ethers'. So, I downgraded to ethers@5.7.2 and ran node deploy.js again.
I then got this error:

Error: could not detect network (event="noNetwork", code=NETWORK_ERROR, version=providers/5.7.2)
    at Logger.makeError (/home/kenny/hh-fcc/ethers-simple-storage-fcc/node_modules/@ethersproject/logger/lib/index.js:238:21)
    at Logger.throwError (/home/kenny/hh-fcc/ethers-simple-storage-fcc/node_modules/@ethersproject/logger/lib/index.js:247:20)
    at JsonRpcProvider.<anonymous> (/home/kenny/hh-fcc/ethers-simple-storage-fcc/node_modules/@ethersproject/providers/lib/json-rpc-provider.js:609:54)
    at step (/home/kenny/hh-fcc/ethers-simple-storage-fcc/node_modules/@ethersproject/providers/lib/json-rpc-provider.js:48:23)
    at Object.throw (/home/kenny/hh-fcc/ethers-simple-storage-fcc/node_modules/@ethersproject/providers/lib/json-rpc-provider.js:29:53)
    at rejected (/home/kenny/hh-fcc/ethers-simple-storage-fcc/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'
}

I have downloaded the ganache software and it's running.
My rpc url does look different than the one in the video.
I have the following setup in the main function...

async function main() {
  const provider = new ethers.providers.JsonRpcProvider(
    "http://127.0.0.1:7545"
  );
  const wallet = new ethers.Wallet(
    "0x304a46582cf53e833c8791c6dba539b9c5e673bcc0350ce5d6ed3ff8afcaee88",
    provider
  );
  const abi = fs.readFileSync("./SimpleStorage_sol_SimpleStorage.abi", "utf-8");
  const binary = fs.readFileSync(
    "./SimpleStorage_sol_SimpleStorage.bin",
    "utf-8"
  );
  const contractFactory = new ethers.ContractFactory(abi, binary, wallet);
  console.log("Deploying, please wait...");
  const contract = await contractFactory.deploy();
  console.log(contract);
}

What's going on here?

[zafi5]

@Beefy-py Okay Shift to latest version of ethers js then try this you can also check this thread #https://ethereum.stackexchange.com/questions/144451/typ@https://ethereum.stackexchange.com/questions/144451/typeerror-cannot-read-properties-of-undefined-reading-jsonrpcprovider

if works make sure marked as Answered

//importing thers and JsonRpcProvider
const { ethers, JsonRpcProvider } = require('ethers');
const fs = require('fs-extra');
async function main() {
  // Json Rpc Provider - Connecting to local blockchain
  const provider = new JsonRpcProvider('address'); // add your rpc server url from Ganache

  // Connect to wallet to sign transactions
  const wallet = new ethers.Wallet(
    'Add your private key here',
    provider
  );

  //Read ABI which you get post compilation using solc
  const abi = fs.readFileSync('./fileName.abi', 'utf8');
  
  //Read Binary which you get post compilation using solc
  const binary = fs.readFileSync(
    './fileName.bin',
    'utf8'
  );

  //Create Contract factory object to deploy
  const contractFactory = new ethers.ContractFactory(abi, binary, wallet);
  console.log('Deploying, Please wait...');
  
  // Deploy and you are good to go
  const contract = await contractFactory.deploy();
  console.log(contract);
}

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

[Beefy-py]

Can you send the URL correctly? It brings me to a 404 page.

[Beefy-py]

I am getting the following error

JsonRpcProvider failed to detect network and cannot start up; retry in 1s (perhaps the URL is wrong or the node is not started)
Error: connect ECONNREFUSED 127.0.0.1:7545
    at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1595:16) {
  errno: -111,
  code: 'ECONNREFUSED',
  syscall: 'connect',
  address: '127.0.0.1',
  port: 7545
}

Eventhough I have the ganache window open.

I am using the first address and it's key

[ansinitro]

In my case

I use the "WSL (UBUNTU) in my "VS Code", therfore to solve this problem.

I went to settings after => to server tab => and changed my hostname to ".... (WSL (Hyper-V firewall))

[wwwwww-ta]

May I ask which software's settings page this is?

[wwwwww-ta]

I can‘t find it

[ansinitro]

I am getting the following error

JsonRpcProvider failed to detect network and cannot start up; retry in 1s (perhaps the URL is wrong or the node is not started)
Error: connect ECONNREFUSED 127.0.0.1:7545
    at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1595:16) {
  errno: -111,
  code: 'ECONNREFUSED',
  syscall: 'connect',
  address: '127.0.0.1',
  port: 7545
}

Eventhough I have the ganache window open.

I am using the first address and it's key