Blob size vulnerability

[avichalp]

In the current architecture, where a user first stages data in a validator (either using Iroh's reverse upload or directly) it is possible that user uploads a big blob lets say 1GB. But it overrides the size param in the SDK to a smaller value eg: 1MB. In this case, the user will be only charged for storing 1MB where as the validators will be forced to store 1GB

[sanderpick]

@avichalp are you still working on this one?

[avichalp]

@sanderpick: yes, i paused it for a while to get #478 done. but started working on it again