How can I pass a parameter into the Chrome Storage get function, and set that parameter as the key?

So I have this function that is supposed to return the saved value of the set key using the chrome storage API:

 function loadBtn(id) {
  return new Promise(resolve => {
    chrome.storage.sync.get([id], function(result) {
      resolve(result.id);
    });
  });
}

Basically, I am looking through all of the elements with the same class, and saving their background-color value, and the key is set as their ID. Heres what I mean (favBtnBG is just an RGB value):

$('.colorBtn').click(function() {
  let favBtnBG = await loadRbgVal();
  var id = $(this).attr('id');
  chrome.storage.sync.set({ [id]: favBtnBG });
})

The problem is that when I try to call the loadBtn function, it returns undefined. Heres how I am calling it (the console logs out undefined)

$('.colorBtn').someListener(function() {
  highlightedRgbVal = await loadBtn($(this).attr('id'));
  console.log(highlightedRgbVal)
})

The way I see it, there could be two possible errors. The first would be that I am not setting the value correctly in the storage. I think that by using the brackets while setting the key, the value of the variable id is used as the key, rather than the string id, but please correct me if I am wrong.

The second possible error is that there is something wrong with my loadBtn function. The function was working before I started passing id into it, so I don't think that I am passing it in correctly.

With that being said, how do I properly pass in a parameter to the storage.sync.get() function?

const id = 'valueOfID';
chrome.storage.sync.get([id], function(result) {
      console.log(result[id]);
});

In this case the value of id is substituted and if your storage look like this:

{
      valueOfID: 'whateveryousetit'
}

then you will log whateveryousetit. If you simply want to read from the storage key id then:

chrome.storage.sync.get(['id'], function(result) {
      console.log(result.id);
});

with this storage:

{
      id: 'yourvalue'
}

you will log yourvalue

I don't think you can combine async await and promises like this. You could call your current load function like this:

loadBtn(id).then(idValueFromStorage) => {
   console.log(idValueFromStorage)
}

Personally, I think that creating promise wrappers for storage getting is pretty pointless. You can make it pretty clean with this syntax:

chrome.storage.sync.get(['yourStorageKey'], ({ yourStorageKey }) => {
    console.log(yourStorageKey);
});