Remove saturation parameter, delta, and instead use expansionRate as part of the storage request, in preparation for a linear curve of the expanding window definition.
Add a parameter, `saturation` to the network-level configuration, under `SlotReservationConfig`. This parameter represents the percentage of total time before expiry that all addresses are eligible to reserve a slot. Total time is the duration between request creation and expiry. Valid range is [0, 99].
Note, this parameter is not yet used anywhere.
Closes#175.
Allows reservation of slots, without an implementation of the expanding window.
- Add a function called `reserveSlot(address, SlotId)`, that allows three unique addresses per slot to be reserved, that returns bool if successful.
- Use `mapping(SlotId => EnumerableSet.AddressSet)`
- Return false if the address could not be added to the set (if `EnumerableSet.add` returns false)
- Add `canReserveSlot(address, SlotId)`
- Return `true` if set of reservations is less than 3 and the set doesn't already contain the address
- Return `true` otherwise (for now, later add in logic for checking the address is inside the expanding window)
- Call `canReserveSlot` from `reserveSlot` as a `require` or invariant
