Upgrade hardhat-viem to support viem@2

[schaable]

This PR represents the first part of adding support for viem@2. A subsequent PR will update hardhat-toolbox-viem and the dependencies in packages/hardhat-core/src/internal/cli/project-creation.ts.

Link to second PR.

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🦋 Changeset detected

Latest commit: bdf5520

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
@nomicfoundation/hardhat-viem	Major
@nomicfoundation/hardhat-toolbox-viem	Major

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Name	Status	Preview	Comments	Updated (UTC)
hardhat	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Feb 20, 2024 8:15am

[fvictorio]

I think our own hre.viem.getContractAt should ideally follow the API of viem.getContract. That is, instead of:

await hre.viem.getContract("Foo", "0x1234567890123456789012345678901234567890", {
  walletClient: secondWalletClient
};

it should become:

await hre.viem.getContract("Foo", "0x1234567890123456789012345678901234567890", {
  client: {
    wallet: secondWalletClient
  }
}

Viem also accepts this:

await hre.viem.getContract("Foo", "0x1234567890123456789012345678901234567890", {
  client: extendedClient
}

But I tried to do it, and making the type-inference work was not straightforward. So I think we could start by only supporting the client: { public, wallet } version. Then adding support for client: extendedClient can be done without breaking changes.

[kanej]

LGTM!