In the past, we could pass a numerical
chainId value into web3.eth.estimateGas (which calls eth_estimateGas) and get a valid response.
It seems that now, it fails with:
invalid argument 0: json: cannot unmarshal non-string into Go struct field TransactionArgs.chainId of type *hexutil.Big
This breaks our service.
Was the API changed? Can it accept chainId again?
Or maybe ignore it altogether as the chain-id is determined by the Infura host anyway?