Multicall get balances of a native currency in a wallet about ethereum-multicall HOT 1 OPEN

I find a work around is calling getEthBalance function from the multicall contract.

const multicallContractAddress = "0xcA11bde05977b3631167028862bE2a173976CA11"
const contractCallContext: ContractCallContext[] = tokenAddresses.map((it) => ({
        reference: `${it}`,
        contractAddress: multicallContractAddress,
        abi: MULTICALL_ABI,
        calls: [{ reference: `callBalanceOf:${it}`, methodName: 'getEthBalance', methodParameters: [walletAddress] }],
    }))

My questions now are:

1. Can I still use null address for ERC20 ABI like in the topic? If yes, how would I need to adjust the code?
2. If the original way does not work, could I not specify particular contractAddress and multicall contract's abi? Like the package already support these and I can reuse them?
   • I find out that there is public static ABI field of Multicall class, but it only has write functions, but not getEthBalance function
   • And there is function getContractBasedOnNetwork suits my needs but it is not published unfortunately. Hence, the work around would be duplicated that function into my own code.

from ethereum-multicall.