Yes, the callable promise abstraction is just a bit of effort:

  let resolveRef;
  const promise = new Promise((res) => { resolveRef = res; });
  
  const callback = (data) => {
    // Do work...
    resolveRef(data); // This "triggers" the await
  };

  Object.assign(callback, promise);

There’s a real performance cost to awaiting a fake Promise though, like `await regularPromise` bypasses the actual thenable stuff.