172 lines
8.3 KiB
C++
172 lines
8.3 KiB
C++
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#include <graphene/chain/database.hpp>
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#include <graphene/chain/nft_object.hpp>
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namespace graphene
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{
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namespace chain
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{
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time_point_sec nft_metadata_object::get_lottery_expiration() const
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{
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if (lottery_data)
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return lottery_data->lottery_options.end_date;
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return time_point_sec();
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}
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asset nft_metadata_object::get_lottery_jackpot(const database &db) const
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{
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if (lottery_data)
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return lottery_data->lottery_balance_id(db).jackpot;
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return asset();
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}
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share_type nft_metadata_object::get_token_current_supply(const database &db) const
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{
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share_type current_supply;
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const auto &idx_lottery_by_md = db.get_index_type<nft_index>().indices().get<by_metadata>();
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auto lottery_range = idx_lottery_by_md.equal_range(id);
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current_supply = std::distance(lottery_range.first, lottery_range.second);
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return current_supply;
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}
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vector<account_id_type> nft_metadata_object::get_holders(const database &db) const
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{
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const auto &idx_lottery_by_md = db.get_index_type<nft_index>().indices().get<by_metadata>();
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auto lottery_range = idx_lottery_by_md.equal_range(id);
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vector<account_id_type> holders;
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holders.reserve(std::distance(lottery_range.first, lottery_range.second));
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std::for_each(lottery_range.first, lottery_range.second,
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[&](const nft_object &ticket) {
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holders.emplace_back(ticket.owner);
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});
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return holders;
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}
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vector<uint64_t> nft_metadata_object::get_ticket_ids(const database &db) const
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{
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const auto &idx_lottery_by_md = db.get_index_type<nft_index>().indices().get<by_metadata>();
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auto lottery_range = idx_lottery_by_md.equal_range(id);
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vector<uint64_t> tickets;
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tickets.reserve(std::distance(lottery_range.first, lottery_range.second));
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std::for_each(lottery_range.first, lottery_range.second,
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[&](const nft_object &ticket) {
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tickets.emplace_back(ticket.id.instance());
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});
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return tickets;
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}
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void nft_metadata_object::distribute_benefactors_part(database &db)
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{
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transaction_evaluation_state eval(&db);
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const auto &lottery_options = lottery_data->lottery_options;
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share_type jackpot = lottery_options.ticket_price.amount * get_token_current_supply(db) + lottery_data->lottery_balance_id(db).total_progressive_jackpot.amount;
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for (auto benefactor : lottery_options.benefactors)
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{
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nft_lottery_reward_operation reward_op;
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reward_op.lottery_id = id;
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reward_op.winner = benefactor.id;
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reward_op.is_benefactor_reward = true;
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reward_op.win_percentage = benefactor.share;
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reward_op.amount = asset(jackpot.value * benefactor.share / GRAPHENE_100_PERCENT, lottery_options.ticket_price.asset_id);
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db.apply_operation(eval, reward_op);
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}
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}
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map<account_id_type, vector<uint16_t>> nft_metadata_object::distribute_winners_part(database &db)
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{
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transaction_evaluation_state eval(&db);
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auto current_supply = get_token_current_supply(db);
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auto &lottery_options = lottery_data->lottery_options;
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auto holders = get_holders(db);
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vector<uint64_t> ticket_ids = get_ticket_ids(db);
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FC_ASSERT(current_supply.value == (int64_t)holders.size());
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FC_ASSERT(get_lottery_jackpot(db).amount.value == current_supply.value * lottery_options.ticket_price.amount.value);
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map<account_id_type, vector<uint16_t>> structurized_participants;
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for (account_id_type holder : holders)
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{
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if (!structurized_participants.count(holder))
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structurized_participants.emplace(holder, vector<uint16_t>());
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}
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uint64_t jackpot = get_lottery_jackpot(db).amount.value;
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auto selections = lottery_options.winning_tickets.size() <= holders.size() ? lottery_options.winning_tickets.size() : holders.size();
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auto winner_numbers = db.get_random_numbers(0, holders.size(), selections, false);
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auto &tickets(lottery_options.winning_tickets);
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if (holders.size() < tickets.size())
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{
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uint16_t percents_to_distribute = 0;
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for (auto i = tickets.begin() + holders.size(); i != tickets.end();)
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{
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percents_to_distribute += *i;
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i = tickets.erase(i);
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}
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for (auto t = tickets.begin(); t != tickets.begin() + holders.size(); ++t)
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*t += percents_to_distribute / holders.size();
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}
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auto sweeps_distribution_percentage = db.get_global_properties().parameters.sweeps_distribution_percentage();
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for (size_t c = 0; c < winner_numbers.size(); ++c)
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{
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auto winner_num = winner_numbers[c];
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nft_lottery_reward_operation reward_op;
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reward_op.lottery_id = id;
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reward_op.is_benefactor_reward = false;
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reward_op.winner = holders[winner_num];
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if (ticket_ids.size() > winner_num)
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{
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reward_op.winner_ticket_id = ticket_ids[winner_num];
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}
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reward_op.win_percentage = tickets[c];
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reward_op.amount = asset(jackpot * tickets[c] * (1. - sweeps_distribution_percentage / (double)GRAPHENE_100_PERCENT) / GRAPHENE_100_PERCENT, lottery_options.ticket_price.asset_id);
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db.apply_operation(eval, reward_op);
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structurized_participants[holders[winner_num]].push_back(tickets[c]);
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}
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return structurized_participants;
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}
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void nft_metadata_object::distribute_sweeps_holders_part(database &db)
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{
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transaction_evaluation_state eval(&db);
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auto &asset_bal_idx = db.get_index_type<account_balance_index>().indices().get<by_asset_balance>();
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auto sweeps_params = db.get_global_properties().parameters;
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uint64_t distribution_asset_supply = sweeps_params.sweeps_distribution_asset()(db).dynamic_data(db).current_supply.value;
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const auto range = asset_bal_idx.equal_range(boost::make_tuple(sweeps_params.sweeps_distribution_asset()));
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asset remaining_jackpot = get_lottery_jackpot(db);
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uint64_t holders_sum = 0;
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for (const account_balance_object &holder_balance : boost::make_iterator_range(range.first, range.second))
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{
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int64_t holder_part = remaining_jackpot.amount.value / (double)distribution_asset_supply * holder_balance.balance.value * SWEEPS_VESTING_BALANCE_MULTIPLIER;
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db.adjust_sweeps_vesting_balance(holder_balance.owner, holder_part);
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holders_sum += holder_part;
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}
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uint64_t balance_rest = remaining_jackpot.amount.value * SWEEPS_VESTING_BALANCE_MULTIPLIER - holders_sum;
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db.adjust_sweeps_vesting_balance(sweeps_params.sweeps_vesting_accumulator_account(), balance_rest);
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db.modify(lottery_data->lottery_balance_id(db), [&](nft_lottery_balance_object &obj) {
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obj.jackpot -= remaining_jackpot;
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});
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}
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void nft_metadata_object::end_lottery(database &db)
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{
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transaction_evaluation_state eval(&db);
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const auto &lottery_options = lottery_data->lottery_options;
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FC_ASSERT(is_lottery());
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FC_ASSERT(lottery_options.is_active && (lottery_options.end_date <= db.head_block_time() || lottery_options.ending_on_soldout));
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auto participants = distribute_winners_part(db);
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if (participants.size() > 0)
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{
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distribute_benefactors_part(db);
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distribute_sweeps_holders_part(db);
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}
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nft_lottery_end_operation end_op;
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end_op.lottery_id = get_id();
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db.apply_operation(eval, end_op);
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}
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} // namespace chain
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} // namespace graphene
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