class AssetManager(Contract):
    protocol = ContractProxyField()

    under_management = WadField()

    def get_interest_rate(self, etoken, kind):
        "Returns the interest rate for a given kind of asset"
        return _R("0.05")

class AssetManager(Contract):
    protocol = ContractProxyField()

    under_management = WadField()
    liquidity_min = WadField()
    liquidity_middle = WadField()
    liquidity_max = WadField()
    # Any time balance_of(Protocol) < liquidity_min we refill up to liquidity_middle
    # Any time balance_of(Protocol) > liquidity_max take liquidity up liquidity_middle

    def get_interest_rate(self, etoken, kind):
        "Returns the interest rate for a given kind of asset"
        return _R("0.05")

    def total_assets(self):
        return self.protocol.active_premiums


Known Problem:

for_lps part of the premiums is counted two times:
1. In etoken accrued interest (partial)
2. In active_premiums

Solution:
Track in eToken separatelly the accrued interest of on-going policies and the for_lps of ended policies.
When the policy ends, remove the accrued from on-going policies and add it to ended policies.