RewardPools: StorageDescriptor<[Key: number], {
    last_recorded_reward_counter: bigint;
    last_recorded_total_payouts: bigint;
    total_commission_claimed: bigint;
    total_commission_pending: bigint;
    total_rewards_claimed: bigint;
}, true>

Reward pools. This is where there rewards for each pool accumulate. When a members payout is claimed, the balance comes out of the reward pool. Keyed by the bonded pools account.