Error: could not detect network

Question

I am currently trying to deploy my DApp 'nftmarketplace' to the net using Vercel on the Goerli test network. However the app is failing to connect to the blockchain and I am getting the following error:

Uncaught (in promise) Error: could not detect network (event="noNetwork", code=NETWORK_ERROR, version=providers/5.6.8)

Here is my hardhat config:

const fs = require('fs');
require('@nomiclabs/hardhat-waffle');

const privateKey = fs.readFileSync('.secret').toString().trim();

module.exports = {
  networks: {
    goerli: {
      url: 'https://eth-goerli.g.alchemy.com/v2/UNfhfGfQ9lrSjTGUS_X-BM-G0_lMEVh9',
      accounts: [privateKey],
    },
  },
  solidity: '0.8.4',
};

Can someone please let me know how to fix this issue?

Here is the link to the github repo if you need that:

https://github.com/BeauC2481/nftmarketplace

Answer 1

That configuration fairly look complex. Instead of 'fs' you can simply use .env file.

First install, dotenv

Next create .env file.

Inside the file, the values should be like this.

ALCHEMY_API_KEY = "*******"
GOERLI_PRIVATE_KEY = "******"

Next set the configuration file like this:

require("@nomiclabs/hardhat-waffle");
require("dotenv").config();


const { GOERLI_PRIVATE_KEY, ALCHEMY_API_KEY } = process.env;

module.exports = {
  solidity: "0.8.9",
  networks: {
    goerli: {
      url: `https://eth-goerli.alchemyapi.io/v2/${ALCHEMY_API_KEY}`,
      accounts: [GOERLI_PRIVATE_KEY],
    },
  },
};

Also your network url is wrong. There shouldn't be .g in the url. You can copy paste mine for the future references.

Tell me if it helps!

EDIT:

So I happened to encounter the same problem as you when I configured new network. Here I was thinking what was the problem, I have configured everything right right?.

Apparently, the problem is not within the url. My URL works correct. And the problem lies in .env file.

Usually the hardhat folder structure is like this:

VSCODE
└── APP
    ├── contracts
    │   ├── contract1.sol
    │   └── contract2.sol
    ├── Scripts
    │   ├── 1_contract1.js
    │   └── 2_contract2.js
    ├── tests
    ├── .env
    ├── hardhat.config.json
    └── package.json

When I am running the 1_contract1.js from inside the scripts folder, I am getting the network not found error.

But when I am running the same file from the root folder that is app according to the diagram, it works.

Like this:

npx hardhat run scripts/1.contract1.js

So problem lies in from where you are running the script file. So try to run from the root folder.

Also if it doesn't work, please share your new configuration file.

Answer 2

The issue on my end was that I was using an old Alchemy API key.