'H88 Error: Invalid account: #0 for network: mumbai - Expected string, received undefined

This is my hardhat.config.js file code


module.exports = {
  solidity: "0.8.4",
  networks: {
    hardhat: {
      chainId: 1337
    },
    mumbai: {
      url: "https://rpc-mumbai.matic.today",
      accounts: [process.env.pk]
    },
    // polygon: {
    //   url: "https://polygon-rpc.com/",
    //   accounts: [process.env.pk]
    // }
  }
};

When running npx hardhat test the following error appears:

**Error HH8: There's one or more errors in your config file:

Invalid account: #0 for network: mumbai - Expected string, received undefined**

Seems I have a couple of errors with my hardhat.config.js file but can't locate. I am using Nader Dabit's full-stack-web3 tutorial for full stack web3 development.

Solution 1:^[1]

Correct:

 mumbai: {
  url: "https://rpc-mumbai.matic.today",
  accounts: process.env.pk

Incorrect:

 mumbai: {
  url: "https://rpc-mumbai.matic.today",
  accounts: [process.env.pk] <-- remove the array

Sources

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Source: Stack Overflow

Solution	Source
Solution 1	Drew

'H88 Error: Invalid account: #0 for network: mumbai - Expected string, received undefined

Solution 1:[1]

Sources

Related Questions

Solution 1:^[1]