about deploying polygon smart contract mumbai

Question

When I run npx hardhat compile I got this error;

Error: Cannot find module '@nomiclabs/hardhat-waffle'
Require stack:
- C:\Users\User\Documents\co\polygon-smart-contract-tutorial\hardhat.config.js
- C:\Users\User\Documents\co\polygon-smart-contract-tutorial\node_modules\hardhat\internal\core\config\config-loading.js
- C:\Users\User\Documents\co\polygon-smart-contract-tutorial\node_modules\hardhat\internal\cli\cli.js    at Function.Module._resolveFilename (node:internal/modules/cjs/loader:933:15)
    at Function.Module._load (node:internal/modules/cjs/loader:778:27)
    at Module.require (node:internal/modules/cjs/loader:1005:19)
    at require (node:internal/modules/cjs/helpers:102:18)
    at Object.<anonymous> (C:\Users\User\Documents\co\polygon-smart-contract-tutorial\hardhat.config.js:1:1)
    at Module._compile (node:internal/modules/cjs/loader:1101:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1153:10)
    at Module.load (node:internal/modules/cjs/loader:981:32)
    at Function.Module._load (node:internal/modules/cjs/loader:822:12)
    at Module.require (node:internal/modules/cjs/loader:1005:19) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [
    'C:\\Users\\User\\Documents\\co\\polygon-smart-contract-tutorial\\hardhat.config.js',
PS C:\Users\User\Documents\co\polygon-smart-contract-tutorial> npx hardhat compile
An unexpected error occurred:

Error: Cannot find module '@nomiclabs/hardhat-waffle'
Require stack:
- C:\Users\User\Documents\co\polygon-smart-contract-tutorial\hardhat.config.js
- C:\Users\User\Documents\co\polygon-smart-contract-tutorial\node_modules\hardhat\internal\core\config\config-loading.js
- C:\Users\User\Documents\co\polygon-smart-contract-tutorial\node_modules\hardhat\internal\cli\cli.js    at Function.Module._resolveFilename (node:internal/modules/cjs/loader:933:15)
    at Function.Module._load (node:internal/modules/cjs/loader:778:27)
    at Module.require (node:internal/modules/cjs/loader:1005:19)
    at require (node:internal/modules/cjs/helpers:102:18)
    at Object.<anonymous> (C:\Users\User\Documents\co\polygon-smart-contract-tutorial\hardhat.config.js:1:1)
    at Module._compile (node:internal/modules/cjs/loader:1101:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1153:10)
    at Module.load (node:internal/modules/cjs/loader:981:32)
    at Function.Module._load (node:internal/modules/cjs/loader:822:12)
    at Module.require (node:internal/modules/cjs/loader:1005:19) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [
    'C:\\Users\\User\\Documents\\co\\polygon-smart-contract-tutorial\\hardhat.config.js',
PS C:\Users\User\Documents\co\polygon-smart-contract-tutorial> npx hardhat compile
An unexpected error occurred:

Error: Cannot find module '@nomiclabs/hardhat-waffle'
Require stack:
- C:\Users\User\Documents\co\polygon-smart-contract-tutorial\hardhat.config.js
- C:\Users\User\Documents\co\polygon-smart-contract-tutorial\node_modules\hardhat\internal\core\config\config-loading.js
- C:\Users\User\Documents\co\polygon-smart-contract-tutorial\node_modules\hardhat\internal\cli\cli.js    at Function.Module._resolveFilename (node:internal/modules/cjs/loader:933:15)
    at Function.Module._load (node:internal/modules/cjs/loader:778:27)
    at Module.require (node:internal/modules/cjs/loader:1005:19)
    at require (node:internal/modules/cjs/helpers:102:18)
    at Object.<anonymous> (C:\Users\User\Documents\co\polygon-smart-contract-tutorial\hardhat.config.js:1:1)
    at Module._compile (node:internal/modules/cjs/loader:1101:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1153:10)
    at Module.load (node:internal/modules/cjs/loader:981:32)
    at Function.Module._load (node:internal/modules/cjs/loader:822:12)
    at Module.require (node:internal/modules/cjs/loader:1005:19) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [
    'C:\\Users\\User\\Documents\\co\\polygon-smart-contract-tutorial\\hardhat.config.js',
    'C:\\Users\\User\\Documents\\co\\polygon-smart-contract-tutorial\\node_modules\\hardhat\\internal\\core\\config\\config-loading.js',
    'C:\\Users\\User\\Documents\\co\\polygon-smart-contract-tutorial\\node_modules\\hardhat\\internal\\cli\\cli.js'
  ]
}

Answer 1

You're probably missing all the dependencies. Try running npm i @nomiclabs/hardhat-waffle @nomiclabs/hardhat-ethers chai ethereum waffle ethers hardhat and try again.

Answer 2

This answer is from Patrck Collins's solidity course.

We need to delete the unwanted config file.

1. Find it

  npx hardhat --verbose

  hardhat:core:config Loading Hardhat config from /Users/hardhat.config.js

2. Then Remove it

rm /Users/hardhat.config.js

Try yarn hardhat again, it worked for me.