Google Find My Device Network implementation

Hello, 

I need to implement Find My Device for nRF52833. 

From Sample I could find "samples/bluetooth/fast_pair/Locator Tag" example. I tried to go through it. but I could not able to map with fast pair specification(Fast Pair  |  Google for Developers). 

I want to check in which function advertisement is prepared ?

How keys(account keys,anti-snoofing keys) are sent in encrypted ?

In the advertisement which data we are sending(like fast pair UUID, Model id, anti snoofing keys, unique mac address,salt field ) etc ?  

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