Answer 1

Cannot you just define a simple function wrapAwait like this:

function wrapAwait(func){
return function(...args) {
return new Promise((resolve, reject)=>{
func(...args, (...callbackArgs)=>{
resolve(callbackArgs);
});
});
};
}

and use it like

const getFromDbA = wrapAwait(getFromDb);
let [error, data] = await getFromDbA(1);

?

Of course you still have to worry about the original function raising an exception.