lesson 7 at 8:48:48

[princesinghkushwah]

require("@nomiclabs/hardhat-waffle")
require("dotenv").config
// This is a sample Hardhat task. To learn how to create your own go to
// https://hardhat.org/guides/create-task.html
task("accounts", "Prints the list of accounts", async (taskArgs, hre) => {
    const accounts = await hre.ethers.getSigners()

    for (const account of accounts) {
        console.log(account.address)
    }
})

// You need to export an object to set up your config
// Go to https://hardhat.org/config/ to learn more

/**
 * @type import('hardhat/config').HardhatUserConfig
 */

const RINKEBY_RPC_URL = process.env.RINKEBY_RPC_URL
const PRIVATE_KEY= process.env.PRIVATE_KEY


module.exports = {
  defaqultNetwork:"hardhat",
  networks: {
    rinkeby: {
      url: "https://eth-rinkeby.alchemyapi.io/v2/4KAmUhYYbfolS2ZDoGELqnEiBjQXz_Tv",
      accounts:PRIVATE_KEY,
      chainId:4,
    },
  },
  solidity: "0.8.8",
}

I'm getting this error when i run yarn hardhat run scripts/deploye.js --network rinkeby

Deplpoying contract
TypeError: Cannot read properties of null (reading 'sendTransaction')
    at ContractFactory.<anonymous> (/home/princesinghkushwah/folder/hh-fcc/hardhat-simple-storage/node_modules/@ethersproject/contracts/src.ts/index.ts:1247:38)
    at step (/home/princesinghkushwah/folder/hh-fcc/hardhat-simple-storage/node_modules/@ethersproject/contracts/lib/index.js:48:23)
    at Object.next (/home/princesinghkushwah/folder/hh-fcc/hardhat-simple-storage/node_modules/@ethersproject/contracts/lib/index.js:29:53)
    at fulfilled (/home/princesinghkushwah/folder/hh-fcc/hardhat-simple-storage/node_modules/@ethersproject/contracts/lib/index.js:20:58)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
ReferenceError: e is not defined
    at /home/princesinghkushwah/folder/hh-fcc/hardhat-simple-storage/scripts/deploye.js:20:18
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

[SantanuDK]

You should try putting your private key inside an array also if you have declared a env variable for your rpc url why are you directly using the url you shoud use the variable instead.

[PatrickAlphaC]

Change:

accounts:PRIVATE_KEY,

To:

accounts: [PRIVATE_KEY],