return error if balance is too low to upload
return error if balance is too low to upload

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