Description
The actor spec contains placeholders for the late fee and temporary sector failure fee.
The late fee needs to become a function of the miner's sector size, which determines its proving and generation attack periods, and constructed such that the maximum penalty is clearly less than or equal to the miner's total pledge collateral. Since this total pledge collateral is dynamic, the late fee might also be a function of block height. Alternative phrasings such as expressing the fee as a fraction of storagepledge collateral, rather than absolute amount, might be more clear.
Similarly for the temporary sector failure fee, it needs to scale with dynamic pledge collateral.
While various coefficients in these functions can be determined later, it would be helpful for the shape of these functions to reflect our intentions. This is a follow-up to some improvements made in #312. These fees need to be computed by the miner submitting a PoSt, which we can't implement until the inputs to that calculation are clear.