TL;DR: In the MVP we introduced an EXTERNAL_FUNDING_METHOD into the RewardActor to mint new funds in subnets. This may no longer be needed, as subnets will allocate in genesis into the gateway all the circulating supply required to mint new funds. With this new approach we'll have to be careful to double-check that we don't rely on the balance of the actor to perform actions and determine if funds are allowed to be sent or not. A vulnerability here could drain all the circulating supply from the gateway in a subnet.
TL;DR: In the MVP we introduced an
EXTERNAL_FUNDING_METHODinto theRewardActorto mint new funds in subnets. This may no longer be needed, as subnets will allocate in genesis into the gateway all the circulating supply required to mint new funds. With this new approach we'll have to be careful to double-check that we don't rely on thebalanceof the actor to perform actions and determine if funds are allowed to be sent or not. A vulnerability here could drain all the circulating supply from the gateway in a subnet.