The Pantagon claim of "Iran's prior notification of attack" is just trash and propaganda. The US certainly noticed Iran's movement and deployment of missile launching units hours before the attack by satellite and other SIGINT assets in the area. Then US made up the story.
If there was "Iran's prior notification to US", then US had given Sadam Husein months of notification of invasion. The 2nd gulf war could have been labeled as a coordinated play between US and Iraq. The bottom line is "attack is an attack", the spilling saliva doesn't matter.
US has been doing this all the time. Examples includes "China's business cutting off from Russia due to US pressure", but in reality it is just temparary adjustment of China to get rid of USD in the loop and the result is for all to see "huge increase". Also the recent "some advanced notification of ICBM launch", what is that some? China told France to issue NOTAM, then France told US in advance? Or US got notice by reading NOTAM themselvs? US ever since Obama has been doing this "making up a show to remain more relevant than it really is".