Add support for `--chainid` argument in `node` command

[thexeromin]

• [ ] Because this PR includes a new feature, the change was previously discussed on an Issue or with someone from the team. (Issues #2305)

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This PR adds support for --chainid argument in npx hardhat node command.

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[alcuadrado]

Thanks, @webdevabhijit!

@fvictorio will review this after we get our next release out.

[thexeromin]

@alcuadrado Sure.

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This PR was marked as stale because it didn't have any activity in the last 30 days. Please excuse us if we didn't have enough time to review it and get it merged. If you are still interested in getting these changes applied, please leave a comment indicating so. Otherwise, it will be closed in 7 days.

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This PR was closed because it has been stalled for 7 days with no activity.

[luncht1me]

Still relevant.

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Name	Status	Preview	Updated
hardhat	❌ Failed (Inspect)		Jul 6, 2022 at 8:57AM (UTC)
hardhat-storybook	❌ Failed (Inspect)		Jul 6, 2022 at 8:57AM (UTC)

[fvictorio]

Hey @ethabhijit, thanks for the PR and sorry for taking so long to respond.

I don't think this implementation works, unless I'm missing something. The reason is that it relies on using hardhat_reset with the new chainId, but I'm pretty sure that hardhat_reset doesn't support that. So I would say that this feature is blocked by https://github.com/NomicFoundation/hardhat/issues/1697

In the meantime, for people landing here, a workaround for this missing feature is to use an environment variable. You should set something like this in your hardhat config:

networks: {
  hardhat: {
    chainId: Number(process.env.HARDHAT_CHAIN_ID) ?? 31337
  },
},

And then HARDHAT_CHAIN_ID=123 npx hardhat node should use 123 as a chain id.