Block number 0 in getBalance is ignored

[fvictorio]

Check existing issues

• I checked there isn't already an issue for the bug I encountered.

Viem Version

2.29.0

Current Behavior

Getting the balance of an account using publicClient.getBalance and blockNumber: 0n returns the balance of the account in the latest block.

Expected Behavior

The balance in the block zero should be returned.

Steps To Reproduce

Start an anvil node and run this script:

import { createPublicClient, createWalletClient, http } from "viem";
import { privateKeyToAccount } from "viem/accounts";
import { anvil } from "viem/chains";

const publicClient = createPublicClient({
    chain: anvil,
    transport: http()
})

const walletClient = createWalletClient({
    account: privateKeyToAccount("0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80"),
    chain: anvil,
    transport: http()
})

await walletClient.sendTransaction({
    to: "0xff000000000000000000000000000000000000ff",
    value: 1000n
})

console.log(await publicClient.getBalance({
    address:  "0xff000000000000000000000000000000000000ff",
    blockNumber: 0n,
}))

Link to Minimal Reproducible Example

No response

Anything else?

I guess this is a non-strict check that is interpreting 0n as falsy.

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