Error HH8: There's one or more errors in your config file: * Invalid value undefined for HardhatConfig.networks.rinkeby.url - Expected a value of t

Question

I get this error when i try to run my script on the rinkeby network: Error HH8: There's one or more errors in your config file:

• Invalid value undefined for HardhatConfig.networks.rinkeby.url - Expected a value of type string.

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

module.exports = {
  solidity: '0.8.1',
  networks: {
    rinkeby: {
      url: process.env.STAGING_ALCHEMY_KEY,
      accounts: process.env.PRIVATE_KEY,
    },
   
  },
};

.env File

  
   process.env.STAGING_ALCHEMY_KEY=https://eth-rinkeby.dotdotdot          
                                                                                 
   process.env.PRIVATE_KEY=PRIVATE_KEY

Answer 1

The problem was from the .env file. The prefix process.env in front of the environment variable isn't needed. I removed it leaving just the STAGING_ALCHEMY_KEY and PRIVATE_KEY variables and their values.