Create utility method for simple selector calculation

With ethereumjs-abi you can do this to obtain the method identifier of some function:

const id = abi.methodID('balanceOf', ['address'])

and this gives you 70a08231.

Is there a way to do this with @ethersproject/abi? I know I can use the abi to create an interface, but in this particular scenario I literally have the name of the function and the list of types of the inputs.

Thanks!

[yuetloo]

var abi = [ "function balanceOf(address)"]
var iface = new ethers.utils.Interface(abi)
var id = iface.getSighash('balanceOf');
// '0x70a08231'

[delaaxe]

Could this be directly availalable on contract methods? As in:

const Contract = await ethers.getContractFactory("ERC20");
const instance = await Contract.deploy(...);
console.log(instance.balanceOf.getSighash());
// 0x70a08231

I can do a code contribution if you point me in the right directions.