fn calculate_rewards_per_proposal(
proposals_tickets: BTreeMap<ProposalId, ProposalTickets>,
bonus_rewards: &BTreeMap<ProposalId, Rewards>,
base_ticket_reward: Rewards,
rewards_slots: &ProposalRewardSlots
) -> Vec<ProposalRewards>
fn calculate_rewards_per_proposal(
proposals_tickets: BTreeMap<ProposalId, ProposalTickets>,
bonus_rewards: &BTreeMap<ProposalId, Rewards>,
base_ticket_reward: Rewards,
rewards_slots: &ProposalRewardSlots
) -> Vec<ProposalRewards>