How to correctly pass --network parameter to Hardhat scripts? - ethereum

Question

I'm trying to deploy to Goerli, but my deploy script seems to ignore the --network parameter.
Here is my hardhat.config.ts:
import { HardhatUserConfig } from "hardhat/config";
import "#nomicfoundation/hardhat-toolbox";
import "hardhat-gas-reporter"
import "#nomiclabs/hardhat-ethers";
import * as dotenv from 'dotenv'
dotenv.config();
const env:any = process.env;
const config: HardhatUserConfig = {
solidity: {
[...]
},
networks: {
hardhat: {
[...]
},
goerli: {
url: 'https://goerli.infura.io/v3/',
accounts: [env['DEPLOYER_PRIVATE_KEY']]
},
},
[...]
};
export default config;
Then I run:
npx hardhat run scripts/deploy.ts --network goerli
And in my deploy.ts:
async function main() {
const [deployer] = await ethers.getSigners();
console.log('Using RPC ', ethers.provider.connection.url);
console.log('Deploying from address', deployer.address);
[...] // contract deployment code
}
However it fails with error "could not detect network". It makes sense because it also logs (from my code):
Using RPC http://localhost:8545
Deploying from address 0x3a5Bd3fBc2a17f2eECf2Cff44aef38bd7dc4fd7c
My address is correct, the address logged indeed corresponds to the account that I provided with the private key from dotenv, so it's being read from the config correctly. However, the RPC URL is incorrect: it seems that it's trying to connect to my local RPC and failing.
Why isn't Hardhat respecting the url property in the config, and still trying to connect to my local instance?

Answer 1

Change
const config: HardhatUserConfig = {
solidity: {
[...]
},
to
module.exports = {
solidity: "0.8.4",
networks: {
goerli: {
url: 'https://goerli.infura.io/v3/',
accounts: [env['DEPLOYER_PRIVATE_KEY']]
}
}
};
If you want to deploy on Hardhat you can run npx hardhat node and remove goerli and const env:any = process.env;.