clarify file contracts
clarify file contracts

mtlynch/Sia,rivine/rivine,ericflo/Sia,MrStrong/Sia,mnsl/Sia,mnsl/Sia,NebulousLabs/Sia,cyrozap/Sia,mharkus/Sia,johnathanhowell/Sia,MrStrong/Sia,kustomzone/Sia,rivine/rivine,NebulousLabs/Sia,ChrisSchinnerl/Sia,mtlynch/Sia,mharkus/Sia,ericflo/Sia,Mingling94/Sia,ChrisSchinnerl/Sia