add early exit to download work
add early exit to download work

NebulousLabs/Sia,ChrisSchinnerl/Sia,mtlynch/Sia,ericflo/Sia,MrStrong/Sia,mharkus/Sia,ChrisSchinnerl/Sia,mtlynch/Sia,mharkus/Sia,mnsl/Sia,NebulousLabs/Sia,ericflo/Sia,mnsl/Sia,MrStrong/Sia