NFT Lottery (#384)

libraries/app/database_api.cpp

@@ -234,7 +234,6 @@ class database_api_impl : public std::enable_shared_from_this<database_api_impl>
       vector<offer_history_object> get_offer_history_by_item(const offer_history_id_type lower_id, const nft_id_type item, uint32_t limit) const;
       vector<offer_history_object> get_offer_history_by_bidder(const offer_history_id_type lower_id, const account_id_type bidder_account_id, uint32_t limit) const;
 
-
       uint32_t api_limit_get_lower_bound_symbol = 100;
       uint32_t api_limit_get_limit_orders = 300;
       uint32_t api_limit_get_limit_orders_by_account = 101;
@@ -248,6 +247,9 @@ class database_api_impl : public std::enable_shared_from_this<database_api_impl>
 
       // Account Role
       vector<account_role_object> get_account_roles_by_owner(account_id_type owner) const;
+      // rng
+      vector<uint64_t> get_random_number_ex(uint64_t minimum, uint64_t maximum, uint64_t selections, bool duplicates) const;
+      uint64_t get_random_number(uint64_t bound) const;
 
    //private:
       const account_object* get_account_from_string( const std::string& name_or_id,
@@ -3174,6 +3176,32 @@ vector<account_role_object> database_api_impl::get_account_roles_by_owner(accoun
    }
    return result;
 }
+//////////////////////////////////////////////////////////////////////
+//                                                                  //
+// Random numbers                                                   //
+//                                                                  //
+//////////////////////////////////////////////////////////////////////
+
+vector<uint64_t> database_api::get_random_number_ex(uint64_t minimum, uint64_t maximum, uint64_t selections, bool duplicates) const
+{
+   return my->get_random_number_ex(minimum, maximum, selections, duplicates);
+}
+
+vector<uint64_t> database_api_impl::get_random_number_ex(uint64_t minimum, uint64_t maximum, uint64_t selections, bool duplicates) const
+{
+   return _db.get_random_numbers(minimum, maximum, selections, duplicates);
+}
+
+uint64_t database_api::get_random_number(uint64_t bound) const
+{
+   return my->get_random_number(bound);
+}
+
+uint64_t database_api_impl::get_random_number(uint64_t bound) const {
+    vector<uint64_t> v = get_random_number_ex(0, bound, 1, false);
+    return v.at(0);
+}
+
 //////////////////////////////////////////////////////////////////////
 //                                                                  //
 // Private methods                                                  //

libraries/app/include/graphene/app/database_api.hpp

@@ -934,7 +934,28 @@ class database_api
       // ACCOUNT ROLE //
       //////////////////
       vector<account_role_object> get_account_roles_by_owner(account_id_type owner) const;
-private:
+
+      /////////////////////////////
+      // Random number generator //
+      /////////////////////////////
+      /**
+       * @brief Returns the random number
+       * @param minimum Lower bound of segment containing random number
+       * @param maximum Upper bound of segment containing random number
+       * @param selections Number of random numbers to return
+       * @param duplicates Allow duplicated numbers
+       * @return Vector containing random numbers from segment [minimum, maximum)
+       */
+      vector<uint64_t> get_random_number_ex(uint64_t minimum, uint64_t maximum, uint64_t selections, bool duplicates) const;
+
+      /**
+       * @brief Returns the random number
+       * @param bound Upper bound of segment containing random number
+       * @return Random number from segment [0, bound)
+       */
+      uint64_t get_random_number(uint64_t bound) const;
+
+   private:
       std::shared_ptr< database_api_impl > my;
 };
 
@@ -1125,4 +1146,7 @@ FC_API(graphene::app::database_api,
 
    // Account Roles
    (get_account_roles_by_owner)
+   // rngs
+   (get_random_number_ex)
+   (get_random_number)
 )

libraries/chain/db_block.cpp

@@ -715,7 +715,8 @@ void database::_apply_block( const signed_block& next_block )
       perform_chain_maintenance(next_block, global_props);
 
    check_ending_lotteries();
-
+   check_ending_nft_lotteries();
+   
    create_block_summary(next_block);
    place_delayed_bets(); // must happen after update_global_dynamic_data() updates the time
    clear_expired_transactions();

libraries/chain/db_getter.cpp

@@ -109,7 +109,7 @@ uint32_t database::last_non_undoable_block_num() const
    return head_block_num() - _undo_db.size();
 }
 
-std::vector<uint32_t> database::get_seeds(asset_id_type for_asset, uint8_t count_winners) const
+std::vector<uint32_t> database::get_seeds( asset_id_type for_asset, uint8_t count_winners ) const
 {
    FC_ASSERT( count_winners <= 64 );
    std::string salted_string = std::string(_random_number_generator._seed) + std::to_string(for_asset.instance.value);
@@ -315,4 +315,36 @@ bool database::is_son_active( son_id_type son_id )
    return (it_son != active_son_ids.end());
 }
 
+vector<uint64_t> database::get_random_numbers(uint64_t minimum, uint64_t maximum, uint64_t selections, bool duplicates)
+{
+   FC_ASSERT( selections <= 100000 );
+   if (duplicates == false) {
+      FC_ASSERT( maximum - minimum >= selections );
+   }
+
+   vector<uint64_t> v;
+   v.reserve(selections);
+
+   if (duplicates) {
+      for (uint64_t i = 0; i < selections; i++) {
+         int64_t rnd = get_random_bits(maximum - minimum) + minimum;
+         v.push_back(rnd);
+      }
+   } else {
+      vector<uint64_t> tmpv;
+      tmpv.reserve(selections);
+      for (uint64_t i = minimum; i < maximum; i++) {
+         tmpv.push_back(i);
+      }
+
+      for (uint64_t i = 0; (i < selections) && (tmpv.size() > 0); i++) {
+         uint64_t idx = get_random_bits(tmpv.size());
+         v.push_back(tmpv.at(idx));
+         tmpv.erase(tmpv.begin() + idx);
+      }
+   }
+
+   return v;
+}
+
 } }

libraries/chain/db_init.cpp

@@ -53,6 +53,7 @@
 #include <graphene/chain/custom_account_authority_object.hpp>
 #include <graphene/chain/offer_object.hpp>
 #include <graphene/chain/account_role_object.hpp>
+#include <graphene/chain/random_number_object.hpp>
 
 #include <graphene/chain/nft_object.hpp>
 
@@ -94,12 +95,14 @@
 #include <graphene/chain/offer_evaluator.hpp>
 #include <graphene/chain/nft_evaluator.hpp>
 #include <graphene/chain/account_role_evaluator.hpp>
+#include <graphene/chain/nft_lottery_evaluator.hpp>
 #include <graphene/chain/son_evaluator.hpp>
 #include <graphene/chain/son_wallet_evaluator.hpp>
 #include <graphene/chain/son_wallet_deposit_evaluator.hpp>
 #include <graphene/chain/son_wallet_withdraw_evaluator.hpp>
 #include <graphene/chain/sidechain_address_evaluator.hpp>
 #include <graphene/chain/sidechain_transaction_evaluator.hpp>
+#include <graphene/chain/random_number_evaluator.hpp>
 
 #include <graphene/chain/protocol/fee_schedule.hpp>
 
@@ -203,6 +206,12 @@ const uint8_t offer_history_object::type_id;
 const uint8_t account_role_object::space_id;
 const uint8_t account_role_object::type_id;
 
+const uint8_t nft_lottery_balance_object::space_id;
+const uint8_t nft_lottery_balance_object::type_id;
+
+const uint8_t random_number_object::space_id;
+const uint8_t random_number_object::type_id;
+
 void database::initialize_evaluators()
 {
    _operation_evaluators.resize(255);
@@ -295,6 +304,9 @@ void database::initialize_evaluators()
    register_evaluator<account_role_create_evaluator>();
    register_evaluator<account_role_update_evaluator>();
    register_evaluator<account_role_delete_evaluator>();
+   register_evaluator<nft_lottery_token_purchase_evaluator>();
+   register_evaluator<nft_lottery_reward_evaluator>();
+   register_evaluator<nft_lottery_end_evaluator>();
    register_evaluator<create_son_evaluator>();
    register_evaluator<update_son_evaluator>();
    register_evaluator<deregister_son_evaluator>();
@@ -314,6 +326,7 @@ void database::initialize_evaluators()
    register_evaluator<sidechain_transaction_sign_evaluator>();
    register_evaluator<sidechain_transaction_send_evaluator>();
    register_evaluator<sidechain_transaction_settle_evaluator>();
+   register_evaluator<random_number_store_evaluator>();
 }
 
 void database::initialize_indexes()
@@ -403,7 +416,9 @@ void database::initialize_indexes()
    add_index< primary_index<lottery_balance_index                         > >();
    add_index< primary_index<sweeps_vesting_balance_index                  > >();
    add_index< primary_index<offer_history_index                           > >();
+   add_index< primary_index<nft_lottery_balance_index                     > >();
    add_index< primary_index<son_stats_index                               > >();
+   add_index< primary_index<random_number_index                           > >();
 
 }
 

libraries/chain/db_management.cpp

@@ -28,6 +28,7 @@
 #include <graphene/chain/witness_schedule_object.hpp>
 #include <graphene/chain/special_authority_object.hpp>
 #include <graphene/chain/operation_history_object.hpp>
+#include <graphene/chain/nft_object.hpp>
 #include <graphene/chain/protocol/fee_schedule.hpp>
 
 #include <fc/io/fstream.hpp>
@@ -304,6 +305,24 @@ void database::check_ending_lotteries()
    } catch( ... ) {}
 }
 
+void database::check_ending_nft_lotteries()
+{
+   try {
+      const auto &nft_lotteries_idx = get_index_type<nft_metadata_index>().indices().get<active_nft_lotteries>();
+      for (auto checking_token : nft_lotteries_idx)
+      {
+         FC_ASSERT(checking_token.is_lottery());
+         const auto &lottery_options = checking_token.lottery_data->lottery_options;
+         FC_ASSERT(lottery_options.is_active);
+         // Check the current supply of lottery tokens
+         auto current_supply = checking_token.get_token_current_supply(*this);
+         if ((lottery_options.ending_on_soldout && (current_supply == checking_token.max_supply)) ||
+             (lottery_options.end_date != time_point_sec() && (lottery_options.end_date <= head_block_time())))
+            checking_token.end_lottery(*this);
+      }
+   } catch( ... ) {}
+}
+
 void database::check_lottery_end_by_participants( asset_id_type asset_id )
 {
    try {

libraries/chain/db_notify.cpp

@@ -364,6 +364,13 @@ struct get_impacted_account_visitor
    void operator()( const account_role_delete_operation& op ){
       _impacted.insert( op.owner );
    }
+   void operator()( const nft_lottery_token_purchase_operation& op ){
+      _impacted.insert( op.buyer );
+   }
+   void operator()( const nft_lottery_reward_operation& op ) {
+      _impacted.insert( op.winner );
+   }
+   void operator()( const nft_lottery_end_operation& op ) {}
    void operator()( const son_create_operation& op ) {
       _impacted.insert( op.owner_account );
    }
@@ -421,6 +428,9 @@ struct get_impacted_account_visitor
    void operator()( const sidechain_transaction_settle_operation& op ) {
       _impacted.insert( op.payer );
    }
+   void operator()( const random_number_store_operation& op ) {
+      _impacted.insert( op.account );
+   }
 };
 
 void graphene::chain::operation_get_impacted_accounts( const operation& op, flat_set<account_id_type>& result, bool ignore_custom_operation_required_auths ) {
@@ -590,6 +600,8 @@ void get_relevant_accounts( const object* obj, flat_set<account_id_type>& accoun
               break;
              case impl_fba_accumulator_object_type:
               break;
+             case impl_nft_lottery_balance_object_type:
+              break;
             default:
               break;
       }

libraries/chain/include/graphene/chain/database.hpp

@@ -286,6 +286,7 @@ namespace graphene { namespace chain {
       
          void check_lottery_end_by_participants( asset_id_type asset_id );
          void check_ending_lotteries();
+         void check_ending_nft_lotteries();
 
          //////////////////// db_getter.cpp ////////////////////
 
@@ -324,6 +325,7 @@ namespace graphene { namespace chain {
 
          uint32_t last_non_undoable_block_num() const;
          vector<authority> get_account_custom_authorities(account_id_type account, const operation& op)const;
+         vector<uint64_t> get_random_numbers(uint64_t minimum, uint64_t maximum, uint64_t selections, bool duplicates);
          //////////////////// db_init.cpp ////////////////////
 
          void initialize_evaluators();

libraries/chain/include/graphene/chain/nft_lottery_evaluator.hpp

@@ -0,0 +1,39 @@
+#pragma once
+#include <graphene/chain/protocol/operations.hpp>
+#include <graphene/chain/evaluator.hpp>
+#include <graphene/chain/database.hpp>
+
+namespace graphene
+{
+   namespace chain
+   {
+
+      class nft_lottery_token_purchase_evaluator : public evaluator<nft_lottery_token_purchase_evaluator>
+      {
+      public:
+         typedef nft_lottery_token_purchase_operation operation_type;
+
+         void_result do_evaluate(const nft_lottery_token_purchase_operation &o);
+         object_id_type do_apply(const nft_lottery_token_purchase_operation &o);
+      };
+
+      class nft_lottery_reward_evaluator : public evaluator<nft_lottery_reward_evaluator>
+      {
+      public:
+         typedef nft_lottery_reward_operation operation_type;
+
+         void_result do_evaluate(const nft_lottery_reward_operation &o);
+         void_result do_apply(const nft_lottery_reward_operation &o);
+      };
+
+      class nft_lottery_end_evaluator : public evaluator<nft_lottery_end_evaluator>
+      {
+      public:
+         typedef nft_lottery_end_operation operation_type;
+
+         void_result do_evaluate(const nft_lottery_end_operation &o);
+         void_result do_apply(const nft_lottery_end_operation &o);
+      };
+
+   } // namespace chain
+} // namespace graphene

libraries/chain/include/graphene/chain/nft_object.hpp

@@ -6,6 +6,29 @@
 namespace graphene { namespace chain {
    using namespace graphene::db;
 
+   class nft_lottery_balance_object : public abstract_object<nft_lottery_balance_object>
+   {
+      public:
+         static const uint8_t space_id = implementation_ids;
+         static const uint8_t type_id  = impl_nft_lottery_balance_object_type;
+
+         // Total Progressive jackpot carried over from previous lotteries
+         asset total_progressive_jackpot;
+         // Current total jackpot in this lottery inclusive of the progressive jackpot
+         asset jackpot;
+         // Total tickets sold
+         share_type sweeps_tickets_sold;
+   };
+
+   struct nft_lottery_data
+   {
+      nft_lottery_data() {}
+      nft_lottery_data(const nft_lottery_options &options, nft_lottery_balance_id_type lottery_id)
+          : lottery_options(options), lottery_balance_id(lottery_id) {}
+      nft_lottery_options lottery_options;
+      nft_lottery_balance_id_type lottery_balance_id;
+   };
+
    class nft_metadata_object : public abstract_object<nft_metadata_object>
    {
       public:
@@ -21,6 +44,21 @@ namespace graphene { namespace chain {
          bool            is_transferable = false;
          bool            is_sellable = true;
          optional<account_role_id_type> account_role;
+         share_type max_supply = GRAPHENE_MAX_SHARE_SUPPLY;
+         optional<nft_lottery_data> lottery_data;
+
+         nft_metadata_id_type get_id() const { return id; }
+         bool is_lottery() const { return lottery_data.valid(); }
+         uint32_t get_owner_num() const { return owner.instance.value; }
+         time_point_sec get_lottery_expiration() const;
+         asset get_lottery_jackpot(const database &db) const;
+         share_type get_token_current_supply(const database &db) const;
+         vector<account_id_type> get_holders(const database &db) const;
+         vector<uint64_t> get_ticket_ids(const database &db) const;
+         void distribute_benefactors_part(database &db);
+         map<account_id_type, vector<uint16_t>> distribute_winners_part(database &db);
+         void distribute_sweeps_holders_part(database &db);
+         void end_lottery(database &db);
    };
 
    class nft_object : public abstract_object<nft_object>
@@ -36,8 +74,23 @@ namespace graphene { namespace chain {
          std::string             token_uri;
    };
 
+   struct nft_lottery_comparer
+   {
+      bool operator()(const nft_metadata_object& lhs, const nft_metadata_object& rhs) const
+      {
+         if ( !lhs.is_lottery() ) return false;
+         if ( !lhs.lottery_data->lottery_options.is_active && !rhs.is_lottery()) return true; // not active lotteries first, just assets then
+         if ( !lhs.lottery_data->lottery_options.is_active ) return false;
+         if ( lhs.lottery_data->lottery_options.is_active && ( !rhs.is_lottery() || !rhs.lottery_data->lottery_options.is_active ) ) return true;
+         return lhs.get_lottery_expiration() > rhs.get_lottery_expiration();
+      }
+   };
+
    struct by_name;
    struct by_symbol;
+   struct active_nft_lotteries;
+   struct by_nft_lottery;
+   struct by_nft_lottery_owner;
    using nft_metadata_multi_index_type = multi_index_container<
       nft_metadata_object,
       indexed_by<
@@ -49,6 +102,34 @@ namespace graphene { namespace chain {
          >,
          ordered_unique< tag<by_symbol>,
             member<nft_metadata_object, std::string, &nft_metadata_object::symbol>
+         >,
+         ordered_non_unique< tag<active_nft_lotteries>,
+            identity< nft_metadata_object >,
+            nft_lottery_comparer
+         >,
+         ordered_unique< tag<by_nft_lottery>,
+            composite_key<
+               nft_metadata_object,
+               const_mem_fun<nft_metadata_object, bool, &nft_metadata_object::is_lottery>,
+               member<object, object_id_type, &object::id>
+            >,
+            composite_key_compare<
+               std::greater< bool >,
+               std::greater< object_id_type >
+            >
+         >,
+         ordered_unique< tag<by_nft_lottery_owner>,
+            composite_key<
+               nft_metadata_object,
+               const_mem_fun<nft_metadata_object, bool, &nft_metadata_object::is_lottery>,
+               const_mem_fun<nft_metadata_object, uint32_t, &nft_metadata_object::get_owner_num>,
+               member<object, object_id_type, &object::id>
+            >,
+            composite_key_compare<
+               std::greater< bool >,
+               std::greater< uint32_t >,
+               std::greater< object_id_type >
+            >
          >
       >
    >;
@@ -86,8 +167,23 @@ namespace graphene { namespace chain {
    >;
    using nft_index = generic_index<nft_object, nft_multi_index_type>;
 
+   using nft_lottery_balance_index_type = multi_index_container<
+      nft_lottery_balance_object,
+      indexed_by<
+         ordered_unique< tag<by_id>, member< object, object_id_type, &object::id > >
+      >
+   >;
+   using nft_lottery_balance_index = generic_index<nft_lottery_balance_object, nft_lottery_balance_index_type>;
+
 } } // graphene::chain
 
+FC_REFLECT_DERIVED( graphene::chain::nft_lottery_balance_object, (graphene::db::object),
+                    (total_progressive_jackpot)
+                    (jackpot)
+                    (sweeps_tickets_sold) )
+
+FC_REFLECT( graphene::chain::nft_lottery_data, (lottery_options)(lottery_balance_id) )
+
 FC_REFLECT_DERIVED( graphene::chain::nft_metadata_object, (graphene::db::object),
                     (owner)
                     (name)
@@ -97,7 +193,9 @@ FC_REFLECT_DERIVED( graphene::chain::nft_metadata_object, (graphene::db::object)
                     (revenue_split)
                     (is_transferable)
                     (is_sellable)
-                    (account_role) )
+                    (account_role)
+                    (max_supply)
+                    (lottery_data) )
 
 FC_REFLECT_DERIVED( graphene::chain::nft_object, (graphene::db::object),
                     (nft_metadata_id)

libraries/chain/include/graphene/chain/protocol/nft_lottery.hpp

@@ -0,0 +1,86 @@
+#pragma once
+#include <graphene/chain/protocol/base.hpp>
+#include <graphene/chain/protocol/types.hpp>
+
+namespace graphene
+{
+    namespace chain
+    {
+        struct nft_lottery_token_purchase_operation : public base_operation
+        {
+            struct fee_parameters_type
+            {
+                uint64_t fee = GRAPHENE_BLOCKCHAIN_PRECISION;
+            };
+            asset fee;
+            // Lottery NFT Metadata
+            nft_metadata_id_type lottery_id;
+            // Buyer purchasing lottery tickets
+            account_id_type buyer;
+            // count of tickets to buy
+            uint64_t tickets_to_buy;
+            // amount that can spent
+            asset amount;
+
+            extensions_type extensions;
+
+            account_id_type fee_payer() const { return buyer; }
+            void validate() const;
+            share_type calculate_fee(const fee_parameters_type &k) const;
+        };
+
+        struct nft_lottery_reward_operation : public base_operation
+        {
+            struct fee_parameters_type
+            {
+                uint64_t fee = GRAPHENE_BLOCKCHAIN_PRECISION;
+            };
+
+            asset fee;
+            // Lottery NFT Metadata
+            nft_metadata_id_type lottery_id;
+            // winner account
+            account_id_type winner;
+            // amount that won
+            asset amount;
+            // percentage of jackpot that user won
+            uint16_t win_percentage;
+            // true if recieved from benefators section of lottery; false otherwise
+            bool is_benefactor_reward;
+
+            uint64_t winner_ticket_id;
+
+            extensions_type extensions;
+
+            account_id_type fee_payer() const { return account_id_type(); }
+            void validate() const {};
+            share_type calculate_fee(const fee_parameters_type &k) const { return k.fee; };
+        };
+
+        struct nft_lottery_end_operation : public base_operation
+        {
+            struct fee_parameters_type
+            {
+                uint64_t fee = GRAPHENE_BLOCKCHAIN_PRECISION;
+            };
+
+            asset fee;
+            // Lottery NFT Metadata
+            nft_metadata_id_type lottery_id;
+
+            extensions_type extensions;
+
+            account_id_type fee_payer() const { return account_id_type(); }
+            void validate() const {}
+            share_type calculate_fee(const fee_parameters_type &k) const { return k.fee; }
+        };
+
+    } // namespace chain
+} // namespace graphene
+
+FC_REFLECT(graphene::chain::nft_lottery_token_purchase_operation::fee_parameters_type, (fee))
+FC_REFLECT(graphene::chain::nft_lottery_reward_operation::fee_parameters_type, (fee))
+FC_REFLECT(graphene::chain::nft_lottery_end_operation::fee_parameters_type, (fee))
+FC_REFLECT(graphene::chain::nft_lottery_token_purchase_operation, (fee)(lottery_id)(buyer)(tickets_to_buy)(amount)(extensions))
+FC_REFLECT(graphene::chain::nft_lottery_reward_operation, (fee)(lottery_id)(winner)(amount)(win_percentage)(is_benefactor_reward)(winner_ticket_id)(extensions))
+FC_REFLECT(graphene::chain::nft_lottery_end_operation, (fee)(lottery_id)(extensions))

libraries/chain/include/graphene/chain/protocol/nft_ops.hpp

@@ -4,6 +4,29 @@
 
 namespace graphene { namespace chain {
 
+   struct nft_lottery_benefactor   {
+      account_id_type id;
+      uint16_t share; // percent * GRAPHENE_1_PERCENT
+      nft_lottery_benefactor() = default;
+      nft_lottery_benefactor( const nft_lottery_benefactor & ) = default;
+      nft_lottery_benefactor( account_id_type _id, uint16_t _share ) : id( _id ), share( _share ) {}
+   };
+
+   struct nft_lottery_options
+   {
+      std::vector<nft_lottery_benefactor> benefactors;
+      // specifying winning tickets as shares that will be issued
+      std::vector<uint16_t>   winning_tickets;
+      asset                   ticket_price;
+      time_point_sec          end_date;
+      bool                    ending_on_soldout;
+      bool                    is_active;
+      bool                    delete_tickets_after_draw = false;
+      std::vector<nft_metadata_id_type> progressive_jackpots;
+
+      void validate() const;
+   };
+
    struct nft_metadata_create_operation : public base_operation
    {
       struct fee_parameters_type
@@ -23,6 +46,10 @@ namespace graphene { namespace chain {
       bool is_sellable = true;
       // Accounts Role
       optional<account_role_id_type> account_role;
+      // Max number of NFTs that can be minted from the metadata
+      optional<share_type> max_supply;
+      // Lottery configuration
+      optional<nft_lottery_options> lottery_options;
       extensions_type    extensions;
 
       account_id_type fee_payer()const { return owner; }
@@ -133,6 +160,9 @@ namespace graphene { namespace chain {
 
 } } // graphene::chain
 
+FC_REFLECT( graphene::chain::nft_lottery_benefactor, (id)(share) )
+FC_REFLECT( graphene::chain::nft_lottery_options, (benefactors)(winning_tickets)(ticket_price)(end_date)(ending_on_soldout)(is_active)(delete_tickets_after_draw)(progressive_jackpots) )
+
 FC_REFLECT( graphene::chain::nft_metadata_create_operation::fee_parameters_type, (fee) (price_per_kbyte) )
 FC_REFLECT( graphene::chain::nft_metadata_update_operation::fee_parameters_type, (fee) )
 FC_REFLECT( graphene::chain::nft_mint_operation::fee_parameters_type, (fee) (price_per_kbyte) )
@@ -140,7 +170,7 @@ FC_REFLECT( graphene::chain::nft_safe_transfer_from_operation::fee_parameters_ty
 FC_REFLECT( graphene::chain::nft_approve_operation::fee_parameters_type, (fee) )
 FC_REFLECT( graphene::chain::nft_set_approval_for_all_operation::fee_parameters_type, (fee) )
 
-FC_REFLECT( graphene::chain::nft_metadata_create_operation, (fee) (owner) (name) (symbol) (base_uri) (revenue_partner) (revenue_split) (is_transferable) (is_sellable) (account_role) (extensions) )
+FC_REFLECT( graphene::chain::nft_metadata_create_operation, (fee) (owner) (name) (symbol) (base_uri) (revenue_partner) (revenue_split) (is_transferable) (is_sellable) (account_role) (max_supply) (lottery_options) (extensions) )
 FC_REFLECT( graphene::chain::nft_metadata_update_operation, (fee) (owner) (nft_metadata_id) (name) (symbol) (base_uri) (revenue_partner) (revenue_split) (is_transferable) (is_sellable) (account_role) (extensions) )
 FC_REFLECT( graphene::chain::nft_mint_operation, (fee) (payer) (nft_metadata_id) (owner) (approved) (approved_operators) (token_uri) (extensions) )
 FC_REFLECT( graphene::chain::nft_safe_transfer_from_operation, (fee) (operator_) (from) (to) (token_id) (data) (extensions) )

libraries/chain/include/graphene/chain/protocol/operations.hpp

@@ -50,12 +50,14 @@
 #include <graphene/chain/protocol/offer.hpp>
 #include <graphene/chain/protocol/nft_ops.hpp>
 #include <graphene/chain/protocol/account_role.hpp>
+#include <graphene/chain/protocol/nft_lottery.hpp>
 #include <graphene/chain/protocol/son.hpp>
 #include <graphene/chain/protocol/sidechain_address.hpp>
 #include <graphene/chain/protocol/son_wallet.hpp>
 #include <graphene/chain/protocol/son_wallet_deposit.hpp>
 #include <graphene/chain/protocol/son_wallet_withdraw.hpp>
 #include <graphene/chain/protocol/sidechain_transaction.hpp>
+#include <graphene/chain/protocol/random_number.hpp>
 
 namespace graphene { namespace chain {
 
@@ -184,7 +186,11 @@ namespace graphene { namespace chain {
             sidechain_transaction_create_operation,
             sidechain_transaction_sign_operation,
             sidechain_transaction_send_operation,
-            sidechain_transaction_settle_operation
+            sidechain_transaction_settle_operation,
+            nft_lottery_token_purchase_operation,
+            nft_lottery_reward_operation,
+            nft_lottery_end_operation,
+            random_number_store_operation
          > operation;
 
    /// @} // operations group

libraries/chain/include/graphene/chain/protocol/random_number.hpp

@@ -0,0 +1,25 @@
+#pragma once
+
+namespace graphene { namespace chain {
+
+   struct random_number_store_operation : public base_operation
+   {
+      struct fee_parameters_type { uint64_t fee = 5000 * GRAPHENE_BLOCKCHAIN_PRECISION; };
+
+      asset             fee;
+
+      account_id_type account;
+      vector<uint64_t> random_number;
+      std::string data;
+
+      account_id_type fee_payer()const { return account; }
+   };
+
+} } // graphene::chain
+
+FC_REFLECT( graphene::chain::random_number_store_operation::fee_parameters_type, (fee) )
+FC_REFLECT( graphene::chain::random_number_store_operation, (fee)
+             (account)
+             (random_number)
+             (data) )
+

libraries/chain/include/graphene/chain/protocol/types.hpp

@@ -183,6 +183,7 @@ namespace graphene { namespace chain {
       son_wallet_withdraw_object_type,
       sidechain_address_object_type,
       sidechain_transaction_object_type,
+      random_number_object_type,
       OBJECT_TYPE_COUNT ///< Sentry value which contains the number of different object types
    };
 
@@ -214,7 +215,8 @@ namespace graphene { namespace chain {
       impl_sweeps_vesting_balance_object_type,
       impl_offer_history_object_type,
       impl_son_statistics_object_type,
-      impl_son_schedule_object_type
+      impl_son_schedule_object_type,
+      impl_nft_lottery_balance_object_type
    };
 
    //typedef fc::unsigned_int            object_id_type;
@@ -258,6 +260,7 @@ namespace graphene { namespace chain {
    class son_wallet_withdraw_object;
    class sidechain_address_object;
    class sidechain_transaction_object;
+   class random_number_object;
 
    typedef object_id< protocol_ids, account_object_type,            account_object>               account_id_type;
    typedef object_id< protocol_ids, asset_object_type,              asset_object>                 asset_id_type;
@@ -297,6 +300,7 @@ namespace graphene { namespace chain {
    typedef object_id< protocol_ids, son_wallet_withdraw_object_type, son_wallet_withdraw_object>  son_wallet_withdraw_id_type;
    typedef object_id< protocol_ids, sidechain_address_object_type,  sidechain_address_object>     sidechain_address_id_type;
    typedef object_id< protocol_ids, sidechain_transaction_object_type,sidechain_transaction_object> sidechain_transaction_id_type;
+   typedef object_id< protocol_ids, random_number_object_type,      random_number_object>         random_number_id_type;
 
    // implementation types
    class global_property_object;
@@ -321,6 +325,7 @@ namespace graphene { namespace chain {
    class lottery_balance_object;
    class sweeps_vesting_balance_object;
    class offer_history_object;
+   class nft_lottery_balance_object;
    class son_statistics_object;
    class son_schedule_object;
 
@@ -352,6 +357,7 @@ namespace graphene { namespace chain {
    typedef object_id< implementation_ids, impl_lottery_balance_object_type, lottery_balance_object >                    lottery_balance_id_type;
    typedef object_id< implementation_ids, impl_sweeps_vesting_balance_object_type, sweeps_vesting_balance_object>       sweeps_vesting_balance_id_type;
    typedef object_id< implementation_ids, impl_offer_history_object_type, offer_history_object>                         offer_history_id_type;
+   typedef object_id< implementation_ids, impl_nft_lottery_balance_object_type, nft_lottery_balance_object>             nft_lottery_balance_id_type;
    typedef object_id< implementation_ids, impl_son_statistics_object_type, son_statistics_object >                      son_statistics_id_type;
    typedef object_id< implementation_ids, impl_son_schedule_object_type, son_schedule_object>                           son_schedule_id_type;
 
@@ -496,6 +502,7 @@ FC_REFLECT_ENUM( graphene::chain::object_type,
                  (son_wallet_withdraw_object_type)
                  (sidechain_address_object_type)
                  (sidechain_transaction_object_type)
+                 (random_number_object_type)
                  (OBJECT_TYPE_COUNT)
                )
 FC_REFLECT_ENUM( graphene::chain::impl_object_type,
@@ -526,6 +533,7 @@ FC_REFLECT_ENUM( graphene::chain::impl_object_type,
                  (impl_offer_history_object_type)
                  (impl_son_statistics_object_type)
                  (impl_son_schedule_object_type)
+                 (impl_nft_lottery_balance_object_type)
                )
 
 FC_REFLECT_TYPENAME( graphene::chain::share_type )
@@ -575,6 +583,7 @@ FC_REFLECT_TYPENAME( graphene::chain::offer_history_id_type )
 FC_REFLECT_TYPENAME( graphene::chain::nft_metadata_id_type )
 FC_REFLECT_TYPENAME( graphene::chain::nft_id_type )
 FC_REFLECT_TYPENAME( graphene::chain::account_role_id_type )
+FC_REFLECT_TYPENAME( graphene::chain::nft_lottery_balance_id_type )
 FC_REFLECT_TYPENAME( graphene::chain::son_id_type )
 FC_REFLECT_TYPENAME( graphene::chain::son_proposal_id_type )
 FC_REFLECT_TYPENAME( graphene::chain::son_wallet_id_type )
@@ -582,7 +591,7 @@ FC_REFLECT_TYPENAME( graphene::chain::son_wallet_deposit_id_type )
 FC_REFLECT_TYPENAME( graphene::chain::son_wallet_withdraw_id_type )
 FC_REFLECT_TYPENAME( graphene::chain::sidechain_address_id_type )
 FC_REFLECT_TYPENAME( graphene::chain::sidechain_transaction_id_type )
-
+FC_REFLECT_TYPENAME( graphene::chain::random_number_id_type )
 
 FC_REFLECT( graphene::chain::void_t, )
 

libraries/chain/include/graphene/chain/random_number_evaluator.hpp

@@ -0,0 +1,19 @@
+#pragma once
+#include <graphene/chain/database.hpp>
+#include <graphene/chain/evaluator.hpp>
+#include <graphene/chain/protocol/operations.hpp>
+#include <graphene/chain/protocol/types.hpp>
+
+namespace graphene { namespace chain {
+
+   class random_number_store_evaluator : public evaluator<random_number_store_evaluator>
+   {
+      public:
+         typedef random_number_store_operation operation_type;
+
+         void_result do_evaluate( const random_number_store_operation& o );
+         object_id_type do_apply( const random_number_store_operation& o );
+   };
+
+} } // graphene::chain
+

libraries/chain/include/graphene/chain/random_number_object.hpp

@@ -0,0 +1,41 @@
+#pragma once
+
+namespace graphene { namespace chain {
+   using namespace graphene::db;
+
+   class random_number_object : public abstract_object<random_number_object>
+   {
+      public:
+         static const uint8_t space_id = protocol_ids;
+         static const uint8_t type_id  = random_number_object_type;
+
+         account_id_type account; /* account who requested random number */
+         time_point_sec timestamp; /* date and time when the number is read */
+         vector<uint64_t> random_number; /* random number(s) */
+         std::string data; /* custom data in json format */
+   };
+
+   struct by_account;
+   struct by_timestamp;
+   using random_number_multi_index_type = multi_index_container<
+      random_number_object,
+      indexed_by<
+         ordered_unique< tag<by_id>,
+            member<object, object_id_type, &object::id>
+         >,
+         ordered_non_unique< tag<by_account>,
+            member<random_number_object, account_id_type, &random_number_object::account>
+         >,
+         ordered_non_unique< tag<by_timestamp>,
+            member<random_number_object, time_point_sec, &random_number_object::timestamp>
+         >
+      >
+   >;
+   using random_number_index = generic_index<random_number_object, random_number_multi_index_type>;
+
+} } // graphene::chain
+
+FC_REFLECT_DERIVED( graphene::chain::random_number_object, (graphene::db::object),
+                    (account) (timestamp)
+                    (random_number) (data) )
+

libraries/chain/include/graphene/chain/rbac_hardfork_visitor.hpp

@@ -57,6 +57,9 @@ namespace graphene
                 case operation::tag<account_role_create_operation>::value:
                 case operation::tag<account_role_update_operation>::value:
                 case operation::tag<account_role_delete_operation>::value:
+                case operation::tag<nft_lottery_token_purchase_operation>::value:
+                case operation::tag<nft_lottery_reward_operation>::value:
+                case operation::tag<nft_lottery_end_operation>::value:
                     FC_ASSERT(block_time >= HARDFORK_NFT_TIME, "Custom permissions and roles not allowed on this operation yet!");
                     break;
                 default:

libraries/chain/nft_evaluator.cpp

@@ -24,6 +24,26 @@ void_result nft_metadata_create_evaluator::do_evaluate( const nft_metadata_creat
       const auto& ar_obj = (*op.account_role)(db());
       FC_ASSERT(ar_obj.owner == op.owner, "Only the Account Role created by the owner can be attached");
    }
+
+   // Lottery Related
+   if (!op.lottery_options) {
+      return void_result();
+   }
+   FC_ASSERT((*op.lottery_options).end_date > now || (*op.lottery_options).end_date == time_point_sec());
+   if (op.max_supply) {
+      FC_ASSERT(*op.max_supply >= 5);
+   }
+
+   for(auto lottery_id: (*op.lottery_options).progressive_jackpots) {
+      const auto& lottery_obj = lottery_id(db());
+      FC_ASSERT(lottery_obj.owner == op.owner, "Only the Owner can attach progressive jackpots");
+      FC_ASSERT(lottery_obj.is_lottery(), "Only lottery objects can be attached as progressive jackpots");
+      FC_ASSERT(lottery_obj.lottery_data->lottery_options.is_active == false, "Lottery should not be active");
+      FC_ASSERT(lottery_obj.lottery_data->lottery_options.ticket_price.asset_id == (*op.lottery_options).ticket_price.asset_id, "Lottery asset type should be same");
+      const auto& lottery_balance_obj = lottery_obj.lottery_data->lottery_balance_id(db());
+      FC_ASSERT(lottery_balance_obj.jackpot.amount > 0, "Non zero progressive jackpot not allowed");
+   }
+
    return void_result();
 } FC_CAPTURE_AND_RETHROW( (op) ) }
 
@@ -39,6 +59,26 @@ object_id_type nft_metadata_create_evaluator::do_apply( const nft_metadata_creat
       obj.is_transferable = op.is_transferable;
       obj.is_sellable = op.is_sellable;
       obj.account_role = op.account_role;
+      if (op.max_supply) {
+         obj.max_supply = *op.max_supply;
+      }
+      if (op.lottery_options) {
+         asset jackpot_sum(0,(*op.lottery_options).ticket_price.asset_id);
+         for(auto lottery_id: (*op.lottery_options).progressive_jackpots) {
+            const auto& lottery_obj = lottery_id(db());
+            const auto& lottery_balance_obj = lottery_obj.lottery_data->lottery_balance_id(db());
+            FC_ASSERT(lottery_balance_obj.jackpot.amount > 0, "Non zero progressive jackpot not allowed");
+            db().modify(lottery_balance_obj, [&] ( nft_lottery_balance_object& nlbo ) {
+               jackpot_sum += nlbo.jackpot;
+               nlbo.jackpot -= nlbo.jackpot;
+            });
+         }
+         const auto& new_lottery_balance_obj = db().create<nft_lottery_balance_object>([&](nft_lottery_balance_object& nlbo) {
+            nlbo.total_progressive_jackpot = jackpot_sum;
+            nlbo.jackpot = jackpot_sum;
+         });
+         obj.lottery_data = nft_lottery_data(*op.lottery_options, new_lottery_balance_obj.id);
+      }
    });
    return new_nft_metadata_object.id;
 } FC_CAPTURE_AND_RETHROW( (op) ) }
@@ -110,6 +150,7 @@ void_result nft_mint_evaluator::do_evaluate( const nft_mint_operation& op )
    FC_ASSERT( itr_nft_md != idx_nft_md.end(), "NFT metadata not found" );
    FC_ASSERT( itr_nft_md->owner == op.payer, "Only metadata owner can mint NFT" );
 
+   FC_ASSERT(itr_nft_md->get_token_current_supply(db()) < itr_nft_md->max_supply, "NFTs can't be minted more than max_supply");
    return void_result();
 } FC_CAPTURE_AND_RETHROW( (op) ) }
 

libraries/chain/nft_lottery_evaluator.cpp

@@ -0,0 +1,145 @@
+#include <graphene/chain/nft_lottery_evaluator.hpp>
+#include <graphene/chain/nft_object.hpp>
+#include <graphene/chain/protocol/operations.hpp>
+#include <graphene/chain/account_role_object.hpp>
+#include <graphene/chain/hardfork.hpp>
+
+namespace graphene
+{
+    namespace chain
+    {
+        void_result nft_lottery_token_purchase_evaluator::do_evaluate(const nft_lottery_token_purchase_operation &op)
+        {
+            try
+            {
+                const database &d = db();
+                auto now = d.head_block_time();
+                FC_ASSERT(now >= HARDFORK_NFT_TIME, "Not allowed until NFT HF");
+                op.buyer(d);
+                const auto &lottery_md_obj = op.lottery_id(d);
+                FC_ASSERT(lottery_md_obj.is_lottery(), "Not a lottery type");
+                if (lottery_md_obj.account_role)
+                {
+                    const auto &ar_idx = d.get_index_type<account_role_index>().indices().get<by_id>();
+                    auto ar_itr = ar_idx.find(*lottery_md_obj.account_role);
+                    if (ar_itr != ar_idx.end())
+                    {
+                        FC_ASSERT(d.account_role_valid(*ar_itr, op.buyer, get_type()), "Account role not valid");
+                    }
+                }
+
+                auto lottery_options = lottery_md_obj.lottery_data->lottery_options;
+                FC_ASSERT(lottery_options.ticket_price.asset_id == op.amount.asset_id);
+                FC_ASSERT((double)op.amount.amount.value / lottery_options.ticket_price.amount.value == (double)op.tickets_to_buy);
+                return void_result();
+            }
+            FC_CAPTURE_AND_RETHROW((op))
+        }
+
+        object_id_type nft_lottery_token_purchase_evaluator::do_apply(const nft_lottery_token_purchase_operation &op)
+        {
+            try
+            {
+                transaction_evaluation_state nft_mint_context(&db());
+                nft_mint_context.skip_fee_schedule_check = true;
+                const auto &lottery_md_obj = op.lottery_id(db());
+                nft_id_type nft_id;
+                for (size_t i = 0; i < op.tickets_to_buy; i++)
+                {
+                    nft_mint_operation mint_op;
+                    mint_op.payer = lottery_md_obj.owner;
+                    mint_op.nft_metadata_id = lottery_md_obj.id;
+                    mint_op.owner = op.buyer;
+                    nft_id = db().apply_operation(nft_mint_context, mint_op).get<object_id_type>();
+                }
+                db().adjust_balance(op.buyer, -op.amount);
+                db().modify(lottery_md_obj.lottery_data->lottery_balance_id(db()), [&](nft_lottery_balance_object &obj) {
+                    obj.jackpot += op.amount;
+                });
+                return nft_id;
+            }
+            FC_CAPTURE_AND_RETHROW((op))
+        }
+
+        void_result nft_lottery_reward_evaluator::do_evaluate(const nft_lottery_reward_operation &op)
+        {
+            try
+            {
+                const database &d = db();
+                auto now = d.head_block_time();
+                FC_ASSERT(now >= HARDFORK_NFT_TIME, "Not allowed until NFT HF");
+                op.winner(d);
+
+                const auto &lottery_md_obj = op.lottery_id(d);
+                FC_ASSERT(lottery_md_obj.is_lottery());
+
+                const auto &lottery_options = lottery_md_obj.lottery_data->lottery_options;
+                FC_ASSERT(lottery_options.is_active);
+                FC_ASSERT(lottery_md_obj.get_lottery_jackpot(d) >= op.amount);
+                return void_result();
+            }
+            FC_CAPTURE_AND_RETHROW((op))
+        }
+
+        void_result nft_lottery_reward_evaluator::do_apply(const nft_lottery_reward_operation &op)
+        {
+            try
+            {
+                const auto &lottery_md_obj = op.lottery_id(db());
+                db().adjust_balance(op.winner, op.amount);
+                db().modify(lottery_md_obj.lottery_data->lottery_balance_id(db()), [&](nft_lottery_balance_object &obj) {
+                    obj.jackpot -= op.amount;
+                });
+                return void_result();
+            }
+            FC_CAPTURE_AND_RETHROW((op))
+        }
+
+        void_result nft_lottery_end_evaluator::do_evaluate(const nft_lottery_end_operation &op)
+        {
+            try
+            {
+                const database &d = db();
+                auto now = d.head_block_time();
+                FC_ASSERT(now >= HARDFORK_NFT_TIME, "Not allowed until NFT HF");
+                const auto &lottery_md_obj = op.lottery_id(d);
+                FC_ASSERT(lottery_md_obj.is_lottery());
+
+                const auto &lottery_options = lottery_md_obj.lottery_data->lottery_options;
+                FC_ASSERT(lottery_options.is_active);
+                FC_ASSERT(lottery_md_obj.get_lottery_jackpot(d).amount == 0);
+                return void_result();
+            }
+            FC_CAPTURE_AND_RETHROW((op))
+        }
+
+        void_result nft_lottery_end_evaluator::do_apply(const nft_lottery_end_operation &op)
+        {
+            try
+            {
+                const auto &lottery_md_obj = op.lottery_id(db());
+                db().modify(lottery_md_obj, [&](nft_metadata_object &obj) {
+                    obj.lottery_data->lottery_options.is_active = false;
+                });
+                db().modify(lottery_md_obj.lottery_data->lottery_balance_id(db()), [&](nft_lottery_balance_object &obj) {
+                    obj.sweeps_tickets_sold = lottery_md_obj.get_token_current_supply(db());
+                });
+
+                if (lottery_md_obj.lottery_data->lottery_options.delete_tickets_after_draw)
+                {
+                    const auto &nft_index_by_md = db().get_index_type<nft_index>().indices().get<by_metadata>();
+                    auto delete_nft_itr = nft_index_by_md.lower_bound(op.lottery_id);
+                    while (delete_nft_itr != nft_index_by_md.end() && delete_nft_itr->nft_metadata_id == op.lottery_id)
+                    {
+                        const nft_object &nft_obj = *delete_nft_itr;
+                        ++delete_nft_itr;
+                        db().remove(nft_obj);
+                    }
+                }
+
+                return void_result();
+            }
+            FC_CAPTURE_AND_RETHROW((op))
+        }
+    } // namespace chain
+} // namespace graphene

libraries/chain/nft_lottery_object.cpp

@@ -0,0 +1,171 @@
+#include <graphene/chain/database.hpp>
+#include <graphene/chain/nft_object.hpp>
+
+namespace graphene
+{
+    namespace chain
+    {
+        time_point_sec nft_metadata_object::get_lottery_expiration() const
+        {
+            if (lottery_data)
+                return lottery_data->lottery_options.end_date;
+            return time_point_sec();
+        }
+
+        asset nft_metadata_object::get_lottery_jackpot(const database &db) const
+        {
+            if (lottery_data)
+                return lottery_data->lottery_balance_id(db).jackpot;
+            return asset();
+        }
+
+        share_type nft_metadata_object::get_token_current_supply(const database &db) const
+        {
+            share_type current_supply;
+            const auto &idx_lottery_by_md = db.get_index_type<nft_index>().indices().get<by_metadata>();
+            auto lottery_range = idx_lottery_by_md.equal_range(id);
+            current_supply = std::distance(lottery_range.first, lottery_range.second);
+            return current_supply;
+        }
+
+        vector<account_id_type> nft_metadata_object::get_holders(const database &db) const
+        {
+            const auto &idx_lottery_by_md = db.get_index_type<nft_index>().indices().get<by_metadata>();
+            auto lottery_range = idx_lottery_by_md.equal_range(id);
+            vector<account_id_type> holders;
+            holders.reserve(std::distance(lottery_range.first, lottery_range.second));
+            std::for_each(lottery_range.first, lottery_range.second,
+                          [&](const nft_object &ticket) {
+                              holders.emplace_back(ticket.owner);
+                          });
+            return holders;
+        }
+
+        vector<uint64_t> nft_metadata_object::get_ticket_ids(const database &db) const
+        {
+            const auto &idx_lottery_by_md = db.get_index_type<nft_index>().indices().get<by_metadata>();
+            auto lottery_range = idx_lottery_by_md.equal_range(id);
+            vector<uint64_t> tickets;
+            tickets.reserve(std::distance(lottery_range.first, lottery_range.second));
+            std::for_each(lottery_range.first, lottery_range.second,
+                          [&](const nft_object &ticket) {
+                              tickets.emplace_back(ticket.id.instance());
+                          });
+            return tickets;
+        }
+
+        void nft_metadata_object::distribute_benefactors_part(database &db)
+        {
+            transaction_evaluation_state eval(&db);
+            const auto &lottery_options = lottery_data->lottery_options;
+            share_type jackpot = lottery_options.ticket_price.amount * get_token_current_supply(db) + lottery_data->lottery_balance_id(db).total_progressive_jackpot.amount;
+
+            for (auto benefactor : lottery_options.benefactors)
+            {
+                nft_lottery_reward_operation reward_op;
+                reward_op.lottery_id = id;
+                reward_op.winner = benefactor.id;
+                reward_op.is_benefactor_reward = true;
+                reward_op.win_percentage = benefactor.share;
+                reward_op.amount = asset(jackpot.value * benefactor.share / GRAPHENE_100_PERCENT, lottery_options.ticket_price.asset_id);
+                db.apply_operation(eval, reward_op);
+            }
+        }
+
+        map<account_id_type, vector<uint16_t>> nft_metadata_object::distribute_winners_part(database &db)
+        {
+            transaction_evaluation_state eval(&db);
+            auto current_supply = get_token_current_supply(db);
+            auto &lottery_options = lottery_data->lottery_options;
+
+            auto holders = get_holders(db);
+            vector<uint64_t> ticket_ids = get_ticket_ids(db);
+            FC_ASSERT(current_supply.value == (int64_t)holders.size());
+            FC_ASSERT(get_lottery_jackpot(db).amount.value == current_supply.value * lottery_options.ticket_price.amount.value);
+            map<account_id_type, vector<uint16_t>> structurized_participants;
+            for (account_id_type holder : holders)
+            {
+                if (!structurized_participants.count(holder))
+                    structurized_participants.emplace(holder, vector<uint16_t>());
+            }
+            uint64_t jackpot = get_lottery_jackpot(db).amount.value;
+            auto selections = lottery_options.winning_tickets.size() <= holders.size() ? lottery_options.winning_tickets.size() : holders.size();
+            auto winner_numbers = db.get_random_numbers(0, holders.size(), selections, false);
+
+            auto &tickets(lottery_options.winning_tickets);
+
+            if (holders.size() < tickets.size())
+            {
+                uint16_t percents_to_distribute = 0;
+                for (auto i = tickets.begin() + holders.size(); i != tickets.end();)
+                {
+                    percents_to_distribute += *i;
+                    i = tickets.erase(i);
+                }
+                for (auto t = tickets.begin(); t != tickets.begin() + holders.size(); ++t)
+                    *t += percents_to_distribute / holders.size();
+            }
+            auto sweeps_distribution_percentage = db.get_global_properties().parameters.sweeps_distribution_percentage();
+            for (size_t c = 0; c < winner_numbers.size(); ++c)
+            {
+                auto winner_num = winner_numbers[c];
+                nft_lottery_reward_operation reward_op;
+                reward_op.lottery_id = id;
+                reward_op.is_benefactor_reward = false;
+                reward_op.winner = holders[winner_num];
+                if (ticket_ids.size() > winner_num)
+                {
+                    reward_op.winner_ticket_id = ticket_ids[winner_num];
+                }
+                reward_op.win_percentage = tickets[c];
+                reward_op.amount = asset(jackpot * tickets[c] * (1. - sweeps_distribution_percentage / (double)GRAPHENE_100_PERCENT) / GRAPHENE_100_PERCENT, lottery_options.ticket_price.asset_id);
+                db.apply_operation(eval, reward_op);
+
+                structurized_participants[holders[winner_num]].push_back(tickets[c]);
+            }
+            return structurized_participants;
+        }
+
+        void nft_metadata_object::distribute_sweeps_holders_part(database &db)
+        {
+            transaction_evaluation_state eval(&db);
+            auto &asset_bal_idx = db.get_index_type<account_balance_index>().indices().get<by_asset_balance>();
+            auto sweeps_params = db.get_global_properties().parameters;
+            uint64_t distribution_asset_supply = sweeps_params.sweeps_distribution_asset()(db).dynamic_data(db).current_supply.value;
+            const auto range = asset_bal_idx.equal_range(boost::make_tuple(sweeps_params.sweeps_distribution_asset()));
+            asset remaining_jackpot = get_lottery_jackpot(db);
+            uint64_t holders_sum = 0;
+            for (const account_balance_object &holder_balance : boost::make_iterator_range(range.first, range.second))
+            {
+                int64_t holder_part = remaining_jackpot.amount.value / (double)distribution_asset_supply * holder_balance.balance.value * SWEEPS_VESTING_BALANCE_MULTIPLIER;
+                db.adjust_sweeps_vesting_balance(holder_balance.owner, holder_part);
+                holders_sum += holder_part;
+            }
+            uint64_t balance_rest = remaining_jackpot.amount.value * SWEEPS_VESTING_BALANCE_MULTIPLIER - holders_sum;
+            db.adjust_sweeps_vesting_balance(sweeps_params.sweeps_vesting_accumulator_account(), balance_rest);
+            db.modify(lottery_data->lottery_balance_id(db), [&](nft_lottery_balance_object &obj) {
+                obj.jackpot -= remaining_jackpot;
+            });
+        }
+
+        void nft_metadata_object::end_lottery(database &db)
+        {
+            transaction_evaluation_state eval(&db);
+            const auto &lottery_options = lottery_data->lottery_options;
+
+            FC_ASSERT(is_lottery());
+            FC_ASSERT(lottery_options.is_active && (lottery_options.end_date <= db.head_block_time() || lottery_options.ending_on_soldout));
+
+            auto participants = distribute_winners_part(db);
+            if (participants.size() > 0)
+            {
+                distribute_benefactors_part(db);
+                distribute_sweeps_holders_part(db);
+            }
+
+            nft_lottery_end_operation end_op;
+            end_op.lottery_id = get_id();
+            db.apply_operation(eval, end_op);
+        }
+    } // namespace chain
+} // namespace graphene

libraries/chain/proposal_evaluator.cpp

@@ -219,6 +219,18 @@ struct proposal_operation_hardfork_visitor
        FC_ASSERT( block_time >= HARDFORK_NFT_TIME, "account_role_delete_operation not allowed yet!" );
    }
 
+   void operator()(const nft_lottery_token_purchase_operation &v) const {
+       FC_ASSERT( block_time >= HARDFORK_NFT_TIME, "nft_lottery_token_purchase_operation not allowed yet!" );
+   }
+
+   void operator()(const nft_lottery_reward_operation &v) const {
+       FC_ASSERT( block_time >= HARDFORK_NFT_TIME, "nft_lottery_reward_operation not allowed yet!" );
+   }
+
+   void operator()(const nft_lottery_end_operation &v) const {
+       FC_ASSERT( block_time >= HARDFORK_NFT_TIME, "nft_lottery_end_operation not allowed yet!" );
+   }
+
    void operator()(const son_create_operation &v) const {
       FC_ASSERT( block_time >= HARDFORK_SON_TIME, "son_create_operation not allowed yet!" );
    }

libraries/chain/protocol/nft.cpp

@@ -45,6 +45,10 @@ void nft_metadata_create_operation::validate() const
    FC_ASSERT(fee.amount >= 0, "Fee must not be negative");
    FC_ASSERT(is_valid_nft_token_name(name), "Invalid NFT name provided");
    FC_ASSERT(is_valid_nft_token_name(symbol), "Invalid NFT symbol provided");
+   if (lottery_options)
+   {
+      (*lottery_options).validate();
+   }
 }
 
 void nft_metadata_update_operation::validate() const

libraries/chain/protocol/nft_lottery.cpp

@@ -0,0 +1,38 @@
+#include <graphene/chain/protocol/nft_ops.hpp>
+#include <graphene/chain/protocol/nft_lottery.hpp>
+#include <graphene/chain/protocol/operations.hpp>
+
+namespace graphene
+{
+    namespace chain
+    {
+
+        void nft_lottery_options::validate() const
+        {
+            FC_ASSERT(winning_tickets.size() <= 64);
+            FC_ASSERT(ticket_price.amount >= 1);
+            uint16_t total = 0;
+            for (auto benefactor : benefactors)
+            {
+                total += benefactor.share;
+            }
+            for (auto share : winning_tickets)
+            {
+                total += share;
+            }
+            FC_ASSERT(total == GRAPHENE_100_PERCENT, "distribution amount not equals GRAPHENE_100_PERCENT");
+            FC_ASSERT(ending_on_soldout == true || end_date != time_point_sec(), "lottery may not end");
+        }
+
+        share_type nft_lottery_token_purchase_operation::calculate_fee(const fee_parameters_type &k) const
+        {
+            return k.fee;
+        }
+
+        void nft_lottery_token_purchase_operation::validate() const
+        {
+            FC_ASSERT(fee.amount >= 0, "Fee must not be negative");
+            FC_ASSERT(tickets_to_buy > 0);
+        }
+    } // namespace chain
+} // namespace graphene

libraries/chain/random_number_evaluator.cpp

@@ -0,0 +1,24 @@
+#include <graphene/chain/random_number_evaluator.hpp>
+#include <graphene/chain/random_number_object.hpp>
+
+namespace graphene { namespace chain {
+
+void_result random_number_store_evaluator::do_evaluate( const random_number_store_operation& op )
+{ try {
+
+   return void_result();
+} FC_CAPTURE_AND_RETHROW( (op) ) }
+
+object_id_type random_number_store_evaluator::do_apply( const random_number_store_operation& op )
+{ try {
+   const auto& new_random_number_object = db().create<random_number_object>( [&]( random_number_object& obj ) {
+         obj.account        = op.account;
+         obj.timestamp      = db().head_block_time();
+         obj.random_number  = op.random_number;
+         obj.data           = op.data;
+   });
+   return new_random_number_object.id;
+} FC_CAPTURE_AND_RETHROW( (op) ) }
+
+} } // graphene::chain
+

libraries/wallet/include/graphene/wallet/wallet.hpp

@@ -73,7 +73,7 @@ enum authority_type
  *  the meta data about the receipt that helps the sender identify which receipt is
  *  for the receiver and which is for the change address.
  */
-struct blind_confirmation 
+struct blind_confirmation
 {
    struct output
    {
@@ -317,7 +317,7 @@ class wallet_api
        */
       uint64_t                          get_account_count()const;
       /** Lists all accounts controlled by this wallet.
-       * This returns a list of the full account objects for all accounts whose private keys 
+       * This returns a list of the full account objects for all accounts whose private keys
        * we possess.
        * @returns a list of account objects
        */
@@ -329,14 +329,14 @@ class wallet_api
        * start by setting \c lowerbound to the empty string \c "", and then each iteration, pass
        * the last account name returned as the \c lowerbound for the next \c list_accounts() call.
        *
-       * @param lowerbound the name of the first account to return.  If the named account does not exist, 
+       * @param lowerbound the name of the first account to return.  If the named account does not exist,
        *                   the list will start at the account that comes after \c lowerbound
        * @param limit the maximum number of accounts to return (max: 1000)
        * @returns a list of accounts mapping account names to account ids
        */
       map<string,account_id_type>       list_accounts(const string& lowerbound, uint32_t limit);
       /** List the balances of an account.
-       * Each account can have multiple balances, one for each type of asset owned by that 
+       * Each account can have multiple balances, one for each type of asset owned by that
        * account.  The returned list will only contain assets for which the account has a
        * nonzero balance
        * @param id the name or id of the account whose balances you want
@@ -344,7 +344,7 @@ class wallet_api
        */
       vector<asset>                     list_account_balances(const string& id);
       /** Lists all assets registered on the blockchain.
-       * 
+       *
        * To list all assets, pass the empty string \c "" for the lowerbound to start
        * at the beginning of the list, and iterate as necessary.
        *
@@ -355,12 +355,12 @@ class wallet_api
       vector<asset_object>              list_assets(const string& lowerbound, uint32_t limit)const;
 
       /** Returns assets count registered on the blockchain.
-       * 
+       *
        * @returns assets count
        */
       uint64_t get_asset_count()const;
-   
-   
+
+
       vector<asset_object>              get_lotteries( asset_id_type stop = asset_id_type(),
                                                        unsigned limit = 100,
                                                        asset_id_type start = asset_id_type() )const;
@@ -396,7 +396,7 @@ class wallet_api
       vector<limit_order_object>        get_limit_orders(string a, string b, uint32_t limit)const;
       vector<call_order_object>         get_call_orders(string a, uint32_t limit)const;
       vector<force_settlement_object>   get_settle_orders(string a, uint32_t limit)const;
-      
+
       /** Returns the block chain's slowly-changing settings.
        * This object contains all of the properties of the blockchain that are fixed
        * or that change only once per maintenance interval (daily) such as the
@@ -452,8 +452,8 @@ class wallet_api
        * Returns the blockchain object corresponding to the given id.
        *
        * This generic function can be used to retrieve any object from the blockchain
-       * that is assigned an ID.  Certain types of objects have specialized convenience 
-       * functions to return their objects -- e.g., assets have \c get_asset(), accounts 
+       * that is assigned an ID.  Certain types of objects have specialized convenience
+       * functions to return their objects -- e.g., assets have \c get_asset(), accounts
        * have \c get_account(), but this function will work for any object.
        *
        * @param id the id of the object to return
@@ -461,7 +461,7 @@ class wallet_api
        */
       variant                           get_object(object_id_type id) const;
 
-      /** Returns the current wallet filename.  
+      /** Returns the current wallet filename.
        *
        * This is the filename that will be used when automatically saving the wallet.
        *
@@ -537,21 +537,21 @@ class wallet_api
        * @ingroup Wallet Management
        */
       bool    is_new()const;
-      
-      /** Checks whether the wallet is locked (is unable to use its private keys).  
+
+      /** Checks whether the wallet is locked (is unable to use its private keys).
        *
        * This state can be changed by calling \c lock() or \c unlock().
        * @return true if the wallet is locked
        * @ingroup Wallet Management
        */
       bool    is_locked()const;
-      
+
       /** Locks the wallet immediately.
        * @ingroup Wallet Management
        */
       void    lock();
-      
-      /** Unlocks the wallet.  
+
+      /** Unlocks the wallet.
        *
        * The wallet remain unlocked until the \c lock is called
        * or the program exits.
@@ -559,7 +559,7 @@ class wallet_api
        * @ingroup Wallet Management
        */
       void    unlock(string password);
-      
+
       /** Sets a new password on the wallet.
        *
        * The wallet must be either 'new' or 'unlocked' to
@@ -572,7 +572,7 @@ class wallet_api
        *
        * The keys are printed in WIF format.  You can import these keys into another wallet
        * using \c import_key()
-       * @returns a map containing the private keys, indexed by their public key 
+       * @returns a map containing the private keys, indexed by their public key
        */
       map<public_key_type, string> dump_private_keys();
 
@@ -607,13 +607,13 @@ class wallet_api
       bool    load_wallet_file(string wallet_filename = "");
 
       /** Quitting from Peerplays wallet.
-       * 
+       *
        * The current wallet will be closed.
        */
       void    quit();
 
       /** Saves the current wallet to the given filename.
-       * 
+       *
        * @warning This does not change the wallet filename that will be used for future
        * writes, so think of this function as 'Save a Copy As...' instead of
        * 'Save As...'.  Use \c set_wallet_filename() to make the filename
@@ -682,7 +682,7 @@ class wallet_api
       /** Imports the private key for an existing account.
        *
        * The private key must match either an owner key or an active key for the
-       * named account.  
+       * named account.
        *
        * @see dump_private_keys()
        *
@@ -820,7 +820,7 @@ class wallet_api
        * @param to the name or id of the account receiving the funds
        * @param amount the amount to send (in nominal units -- to send half of a BTS, specify 0.5)
        * @param asset_symbol the symbol or id of the asset to send
-       * @param memo a memo to attach to the transaction.  The memo will be encrypted in the 
+       * @param memo a memo to attach to the transaction.  The memo will be encrypted in the
        *             transaction and readable for the receiver.  There is no length limit
        *             other than the limit imposed by maximum transaction size, but transaction
        *             increase with transaction size
@@ -895,7 +895,7 @@ class wallet_api
        *  who sent it.
        *
        *  @param opt_from - if not empty and the sender is a unknown public key, then the unknown public key will be given the label opt_from
-       *  @param confirmation_receipt - a base58 encoded stealth confirmation 
+       *  @param confirmation_receipt - a base58 encoded stealth confirmation
        */
       blind_receipt receive_blind_transfer( string confirmation_receipt, string opt_from, string opt_memo );
 
@@ -903,18 +903,18 @@ class wallet_api
        *  Transfers a public balance from @from to one or more blinded balances using a
        *  stealth transfer.
        */
-      blind_confirmation transfer_to_blind( string from_account_id_or_name, 
+      blind_confirmation transfer_to_blind( string from_account_id_or_name,
                                             string asset_symbol,
                                             /** map from key or label to amount */
-                                            vector<pair<string, string>> to_amounts, 
+                                            vector<pair<string, string>> to_amounts,
                                             bool broadcast = false );
 
       /**
        * Transfers funds from a set of blinded balances to a public account balance.
        */
-      blind_confirmation transfer_from_blind( 
+      blind_confirmation transfer_from_blind(
                                             string from_blind_account_key_or_label,
-                                            string to_account_id_or_name, 
+                                            string to_account_id_or_name,
                                             string amount,
                                             string asset_symbol,
                                             bool broadcast = false );
@@ -930,14 +930,14 @@ class wallet_api
 
       /** Place a limit order attempting to sell one asset for another.
        *
-       * Buying and selling are the same operation on Graphene; if you want to buy BTS 
+       * Buying and selling are the same operation on Graphene; if you want to buy BTS
        * with USD, you should sell USD for BTS.
        *
        * The blockchain will attempt to sell the \c symbol_to_sell for as
-       * much \c symbol_to_receive as possible, as long as the price is at 
-       * least \c min_to_receive / \c amount_to_sell.   
+       * much \c symbol_to_receive as possible, as long as the price is at
+       * least \c min_to_receive / \c amount_to_sell.
        *
-       * In addition to the transaction fees, market fees will apply as specified 
+       * In addition to the transaction fees, market fees will apply as specified
        * by the issuer of both the selling asset and the receiving asset as
        * a percentage of the amount exchanged.
        *
@@ -950,16 +950,16 @@ class wallet_api
        *
        * @todo Allow order expiration to be set here.  Document default/max expiration time
        *
-       * @param seller_account the account providing the asset being sold, and which will 
+       * @param seller_account the account providing the asset being sold, and which will
        *                       receive the proceeds of the sale.
        * @param amount_to_sell the amount of the asset being sold to sell (in nominal units)
        * @param symbol_to_sell the name or id of the asset to sell
        * @param min_to_receive the minimum amount you are willing to receive in return for
        *                       selling the entire amount_to_sell
        * @param symbol_to_receive the name or id of the asset you wish to receive
-       * @param timeout_sec if the order does not fill immediately, this is the length of 
-       *                    time the order will remain on the order books before it is 
-       *                    cancelled and the un-spent funds are returned to the seller's 
+       * @param timeout_sec if the order does not fill immediately, this is the length of
+       *                    time the order will remain on the order books before it is
+       *                    cancelled and the un-spent funds are returned to the seller's
        *                    account
        * @param fill_or_kill if true, the order will only be included in the blockchain
        *                     if it is filled immediately; if false, an open order will be
@@ -976,12 +976,12 @@ class wallet_api
                                     uint32_t timeout_sec = 0,
                                     bool     fill_or_kill = false,
                                     bool     broadcast = false);
-                                    
+
       /** Place a limit order attempting to sell one asset for another.
-       * 
+       *
        * This API call abstracts away some of the details of the sell_asset call to be more
        * user friendly. All orders placed with sell never timeout and will not be killed if they
-       * cannot be filled immediately. If you wish for one of these parameters to be different, 
+       * cannot be filled immediately. If you wish for one of these parameters to be different,
        * then sell_asset should be used instead.
        *
        * @param seller_account the account providing the asset being sold, and which will
@@ -991,7 +991,7 @@ class wallet_api
        * @param rate The rate in base:quote at which you want to sell.
        * @param amount The amount of base you want to sell.
        * @param broadcast true to broadcast the transaction on the network.
-       * @returns The signed transaction selling the funds.                 
+       * @returns The signed transaction selling the funds.
        */
       signed_transaction sell( string seller_account,
                                string base,
@@ -999,7 +999,7 @@ class wallet_api
                                double rate,
                                double amount,
                                bool broadcast );
-                               
+
       /** Place a limit order attempting to buy one asset with another.
        *
        * This API call abstracts away some of the details of the sell_asset call to be more
@@ -1054,14 +1054,14 @@ class wallet_api
        * Right now this function is difficult to use because you must provide raw JSON data
        * structures for the options objects, and those include prices and asset ids.
        *
-       * @param issuer the name or id of the account who will pay the fee and become the 
+       * @param issuer the name or id of the account who will pay the fee and become the
        *               issuer of the new asset.  This can be updated later
        * @param symbol the ticker symbol of the new asset
        * @param precision the number of digits of precision to the right of the decimal point,
        *                  must be less than or equal to 12
        * @param common asset options required for all new assets.
-       *               Note that core_exchange_rate technically needs to store the asset ID of 
-       *               this new asset. Since this ID is not known at the time this operation is 
+       *               Note that core_exchange_rate technically needs to store the asset ID of
+       *               this new asset. Since this ID is not known at the time this operation is
        *               created, create this price as though the new asset has instance ID 1, and
        *               the chain will overwrite it with the new asset's ID.
        * @param bitasset_opts options specific to BitAssets.  This may be null unless the
@@ -1081,7 +1081,7 @@ class wallet_api
                                           asset_options common,
                                           lottery_asset_options lottery_opts,
                                           bool broadcast = false);
-   
+
       signed_transaction buy_ticket( asset_id_type lottery, account_id_type buyer, uint64_t tickets_to_buy );
 
       /** Issue new shares of an asset.
@@ -1099,8 +1099,8 @@ class wallet_api
                                      bool broadcast = false);
 
       /** Update the core options on an asset.
-       * There are a number of options which all assets in the network use. These options are 
-       * enumerated in the asset_object::asset_options struct. This command is used to update 
+       * There are a number of options which all assets in the network use. These options are
+       * enumerated in the asset_object::asset_options struct. This command is used to update
        * these options for an existing asset.
        *
        * @note This operation cannot be used to update BitAsset-specific options. For these options,
@@ -1164,7 +1164,7 @@ class wallet_api
       signed_transaction update_asset_feed_producers(string symbol,
                                                      flat_set<string> new_feed_producers,
                                                      bool broadcast = false);
-      
+
       /** Publishes a price feed for the named asset.
        *
        * Price feed providers use this command to publish their price feeds for market-issued assets. A price feed is
@@ -1192,7 +1192,7 @@ class wallet_api
 
       /** Pay into the fee pool for the given asset.
        *
-       * User-issued assets can optionally have a pool of the core asset which is 
+       * User-issued assets can optionally have a pool of the core asset which is
        * automatically used to pay transaction fees for any transaction using that
        * asset (using the asset's core exchange rate).
        *
@@ -1233,7 +1233,7 @@ class wallet_api
        * used as backing for other bitassets, those bitassets will be force settled at their current
        * feed price.
        *
-       * @note this operation is used only by the asset issuer, \c settle_asset() may be used by 
+       * @note this operation is used only by the asset issuer, \c settle_asset() may be used by
        *       any user owning the asset
        *
        * @param symbol the name or id of the asset to force settlement on
@@ -1301,7 +1301,7 @@ class wallet_api
        * @returns the signed transaction registering a committee_member
        */
       signed_transaction create_committee_member(string owner_account,
-                                         string url, 
+                                         string url,
                                          bool broadcast = false);
 
       /** Lists all witnesses registered in the blockchain.
@@ -1312,7 +1312,7 @@ class wallet_api
        * start by setting \c lowerbound to the empty string \c "", and then each iteration, pass
        * the last witness name returned as the \c lowerbound for the next \c list_witnesss() call.
        *
-       * @param lowerbound the name of the first witness to return.  If the named witness does not exist, 
+       * @param lowerbound the name of the first witness to return.  If the named witness does not exist,
        *                   the list will start at the witness that comes after \c lowerbound
        * @param limit the maximum number of witnesss to return (max: 1000)
        * @returns a list of witnesss mapping witness names to witness ids
@@ -1327,7 +1327,7 @@ class wallet_api
        * start by setting \c lowerbound to the empty string \c "", and then each iteration, pass
        * the last committee_member name returned as the \c lowerbound for the next \c list_committee_members() call.
        *
-       * @param lowerbound the name of the first committee_member to return.  If the named committee_member does not exist, 
+       * @param lowerbound the name of the first committee_member to return.  If the named committee_member does not exist,
        *                   the list will start at the committee_member that comes after \c lowerbound
        * @param limit the maximum number of committee_members to return (max: 1000)
        * @returns a list of committee_members mapping committee_member names to committee_member ids
@@ -1647,7 +1647,7 @@ class wallet_api
 
       /** Vote for a given committee_member.
        *
-       * An account can publish a list of all committee_memberes they approve of.  This 
+       * An account can publish a list of all committee_memberes they approve of.  This
        * command allows you to add or remove committee_memberes from this list.
        * Each account's vote is weighted according to the number of shares of the
        * core asset owned by that account at the time the votes are tallied.
@@ -1657,7 +1657,7 @@ class wallet_api
        *
        * @param voting_account the name or id of the account who is voting with their shares
        * @param committee_member the name or id of the committee_member' owner account
-       * @param approve true if you wish to vote in favor of that committee_member, false to 
+       * @param approve true if you wish to vote in favor of that committee_member, false to
        *                remove your vote in favor of that committee_member
        * @param broadcast true if you wish to broadcast the transaction
        * @return the signed transaction changing your vote for the given committee_member
@@ -1724,7 +1724,7 @@ class wallet_api
 
       /** Vote for a given witness.
        *
-       * An account can publish a list of all witnesses they approve of.  This 
+       * An account can publish a list of all witnesses they approve of.  This
        * command allows you to add or remove witnesses from this list.
        * Each account's vote is weighted according to the number of shares of the
        * core asset owned by that account at the time the votes are tallied.
@@ -1734,7 +1734,7 @@ class wallet_api
        *
        * @param voting_account the name or id of the account who is voting with their shares
        * @param witness the name or id of the witness' owner account
-       * @param approve true if you wish to vote in favor of that witness, false to 
+       * @param approve true if you wish to vote in favor of that witness, false to
        *                remove your vote in favor of that witness
        * @param broadcast true if you wish to broadcast the transaction
        * @return the signed transaction changing your vote for the given witness
@@ -1746,12 +1746,12 @@ class wallet_api
 
       /** Change your witness votes.
        *
-       * An account can publish a list of all witnesses they approve of.  
+       * An account can publish a list of all witnesses they approve of.
        * Each account's vote is weighted according to the number of shares of the
        * core asset owned by that account at the time the votes are tallied.
-       * This command allows you to add or remove one or more witnesses from this list 
+       * This command allows you to add or remove one or more witnesses from this list
        * in one call.  When you are changing your vote on several witnesses, this
-       * may be easier than multiple `vote_for_witness` and 
+       * may be easier than multiple `vote_for_witness` and
        * `set_desired_witness_and_committee_member_count` calls.
        *
        * @note you cannot vote against a witness, you can only vote for the witness
@@ -1766,7 +1766,7 @@ class wallet_api
        *                            you currently approve).  This list can be empty.
        * @param desired_number_of_witnesses the number of witnesses you believe the network
        *                                    should have.  You must vote for at least this many
-       *                                    witnesses.  You can set this to 0 to abstain from 
+       *                                    witnesses.  You can set this to 0 to abstain from
        *                                    voting on the number of witnesses.
        * @param broadcast true if you wish to broadcast the transaction
        * @return the signed transaction changing your vote for the given witnesses
@@ -1797,23 +1797,23 @@ class wallet_api
       signed_transaction set_voting_proxy(string account_to_modify,
                                           optional<string> voting_account,
                                           bool broadcast = false);
-      
+
       /** Set your vote for the number of witnesses and committee_members in the system.
        *
-       * Each account can voice their opinion on how many committee_members and how many 
+       * Each account can voice their opinion on how many committee_members and how many
        * witnesses there should be in the active committee_member/active witness list.  These
        * are independent of each other.  You must vote your approval of at least as many
        * committee_members or witnesses as you claim there should be (you can't say that there should
-       * be 20 committee_members but only vote for 10). 
+       * be 20 committee_members but only vote for 10).
        *
-       * There are maximum values for each set in the blockchain parameters (currently 
+       * There are maximum values for each set in the blockchain parameters (currently
        * defaulting to 1001).
        *
        * This setting can be changed at any time.  If your account has a voting proxy
        * set, your preferences will be ignored.
        *
        * @param account_to_modify the name or id of the account to update
-       * @param number_of_committee_members the number 
+       * @param number_of_committee_members the number
        *
        * @param broadcast true if you wish to broadcast the transaction
        * @return the signed transaction changing your vote proxy settings
@@ -1866,16 +1866,16 @@ class wallet_api
 
       /** Returns an uninitialized object representing a given blockchain operation.
        *
-       * This returns a default-initialized object of the given type; it can be used 
+       * This returns a default-initialized object of the given type; it can be used
        * during early development of the wallet when we don't yet have custom commands for
-       * creating all of the operations the blockchain supports.  
+       * creating all of the operations the blockchain supports.
        *
        * Any operation the blockchain supports can be created using the transaction builder's
-       * \c add_operation_to_builder_transaction() , but to do that from the CLI you need to 
+       * \c add_operation_to_builder_transaction() , but to do that from the CLI you need to
        * know what the JSON form of the operation looks like.  This will give you a template
        * you can fill in.  It's better than nothing.
-       * 
-       * @param operation_type the type of operation to return, must be one of the 
+       *
+       * @param operation_type the type of operation to return, must be one of the
        *                       operations defined in `graphene/chain/operations.hpp`
        *                       (e.g., "global_parameters_update_operation")
        * @return a default-constructed operation of the given type
@@ -1900,7 +1900,7 @@ class wallet_api
          bool broadcast = false);
 
       /** Propose a fee change.
-       * 
+       *
        * @param proposing_account The account paying the fee to propose the tx
        * @param expiration_time Timestamp specifying when the proposal will either take effect or expire.
        * @param changed_values Map of operation type to new fee.  Operations may be specified by name or ID.
@@ -1942,7 +1942,33 @@ class wallet_api
          const approval_delta& delta,
          bool broadcast /* = false */
          );
-         
+
+      /** Get random numbers
+       * @brief Returns the random number
+       * @param minimum Lower bound of segment containing random number
+       * @param maximum Upper bound of segment containing random number
+       * @param selections Number of random numbers to return
+       * @param duplicates Allow duplicated numbers
+       * @param broadcast true if you wish to broadcast the transaction
+       * @return the signed version of the transaction
+       * @return Vector containing random numbers from segment [minimum, maximum)
+       */
+      vector<uint64_t> get_random_number_ex(string account,
+                                            uint64_t minimum,
+                                            uint64_t maximum,
+                                            uint64_t selections,
+                                            bool duplicates,
+                                            bool broadcast);
+
+      /** Get random number
+       * @brief Returns the random number
+       * @param bound Upper bound of segment containing random number
+       * @return Random number from segment [0, bound)
+       */
+      uint64_t get_random_number(string account,
+                                 uint64_t bound,
+                                 bool broadcast);
+
       order_book get_order_book( const string& base, const string& quote, unsigned limit = 50);
 
       asset get_total_matched_bet_amount_for_betting_market_group(betting_market_group_id_type group_id);
@@ -1981,7 +2007,7 @@ class wallet_api
               sport_id_type sport_id,
               fc::optional<internationalized_string_type> name,
               bool broadcast = false);
-    
+
       signed_transaction propose_delete_sport(
               const string& proposing_account,
               fc::time_point_sec expiration_time,
@@ -2008,7 +2034,7 @@ class wallet_api
               fc::time_point_sec expiration_time,
               event_group_id_type event_group,
               bool broadcast = false);
-    
+
       signed_transaction propose_create_event(
               const string& proposing_account,
               fc::time_point_sec expiration_time,
@@ -2079,7 +2105,7 @@ class wallet_api
               fc::optional<internationalized_string_type> payout_condition,
               bool broadcast = false);
 
-      /** Place a bet  
+      /** Place a bet
        * @param bettor the account placing the bet
        * @param betting_market_id the market on which to bet
        * @param back_or_lay back or lay
@@ -2155,7 +2181,7 @@ class wallet_api
                                                          tournament_state state);
 
       /** Get specific information about a tournament
-       * @param tournament_id the ID of the tournament 
+       * @param tournament_id the ID of the tournament
        */
       tournament_object get_tournament(tournament_id_type id);
 
@@ -2201,6 +2227,7 @@ class wallet_api
       vector<custom_account_authority_object> get_custom_account_authorities_by_permission_id(custom_permission_id_type permission_id) const;
       vector<custom_account_authority_object> get_custom_account_authorities_by_permission_name(string owner, string permission_name) const;
       vector<authority> get_active_custom_account_authorities_by_operation(string owner, int operation_type) const;
+
       /////////
       // NFT //
       /////////
@@ -2226,6 +2253,8 @@ class wallet_api
                                     bool is_transferable,
                                     bool is_sellable,
                                     optional<account_role_id_type> role_id,
+                                    optional<share_type> max_supply,
+                                    optional<nft_lottery_options> lottery_options,
                                     bool broadcast);
 
       /**
@@ -2363,6 +2392,7 @@ class wallet_api
        * @return Returns vector of NFT objects, empty vector if none
        */
       vector<nft_object> nft_get_all_tokens() const;
+      signed_transaction nft_lottery_buy_ticket( nft_metadata_id_type lottery, account_id_type buyer, uint64_t tickets_to_buy, bool broadcast );
 
       signed_transaction create_offer(set<nft_id_type> item_ids,
                                       string issuer_accound_id_or_name,
@@ -2503,7 +2533,7 @@ FC_REFLECT_DERIVED( graphene::wallet::signed_block_with_info, (graphene::chain::
 FC_REFLECT_DERIVED( graphene::wallet::vesting_balance_object_with_info, (graphene::chain::vesting_balance_object),
    (allowed_withdraw)(allowed_withdraw_time) )
 
-FC_REFLECT( graphene::wallet::operation_detail, 
+FC_REFLECT( graphene::wallet::operation_detail,
             (memo)(description)(op) )
 
 FC_API( graphene::wallet::wallet_api,
@@ -2634,6 +2664,8 @@ FC_API( graphene::wallet::wallet_api,
         (propose_fee_change)
         (propose_dividend_asset_update)
         (approve_proposal)
+        (get_random_number_ex)
+        (get_random_number)
         (dbg_make_uia)
         (dbg_make_mia)
         (dbg_push_blocks)
@@ -2697,6 +2729,7 @@ FC_API( graphene::wallet::wallet_api,
         (nft_get_approved)
         (nft_is_approved_for_all)
         (nft_get_all_tokens)
+        (nft_lottery_buy_ticket)
         (create_offer)
         (create_bid)
         (cancel_offer)

libraries/wallet/wallet.cpp

@@ -615,7 +615,7 @@ public:
 
       throw fc::canceled_exception();
    }
-   
+
    bool copy_wallet_file( string destination_filename )
    {
       fc::path src_path = get_wallet_filename();
@@ -909,7 +909,7 @@ public:
          const rock_paper_scissors_game_details& rps_details = game_obj.game_details.get<rock_paper_scissors_game_details>();
          for (unsigned i = 0; i < 2; ++i)
          {
-            if (rps_details.commit_moves.at(i) && 
+            if (rps_details.commit_moves.at(i) &&
                 !rps_details.reveal_moves.at(i)) // if this player has committed but not revealed
             {
                const account_id_type& account_id = game_obj.players[i];
@@ -929,7 +929,7 @@ public:
                      if (iter != _wallet.committed_game_moves.end())
                      {
                         const rock_paper_scissors_throw_reveal& reveal = iter->second;
-                        
+
                         game_move_operation move_operation;
                         move_operation.game_id = game_obj.id;
                         move_operation.player_account_id = account_id;
@@ -972,7 +972,7 @@ public:
       }
    } FC_RETHROW_EXCEPTIONS(warn, "") }
 
-   // Cache all matches in the tournament, which will also register us for 
+   // Cache all matches in the tournament, which will also register us for
    // updates on those matches
    void monitor_matches_in_tournament(const tournament_object& tournament_obj)
    { try {
@@ -1129,8 +1129,8 @@ public:
             dlog( "validated successfully tmp wallet file ${fn}", ("fn", tmp_wallet_filename) );
             fc::rename( tmp_wallet_filename, wallet_filename );
             dlog( "renamed successfully tmp wallet file ${fn}", ("fn", tmp_wallet_filename) );
-         } 
-         else 
+         }
+         else
          {
             FC_THROW("tmp wallet file cannot be validated ${fn}", ("fn", tmp_wallet_filename) );
          }
@@ -1625,7 +1625,7 @@ public:
 
       return sign_transaction( tx, broadcast );
    } FC_CAPTURE_AND_RETHROW( (issuer)(symbol)(common)(broadcast) ) }
-   
+
    signed_transaction buy_ticket( asset_id_type lottery, account_id_type buyer, uint64_t tickets_to_buy )
    { try {
       auto asset_obj = get_asset( lottery );
@@ -1636,7 +1636,7 @@ public:
       top.buyer = buyer;
       top.tickets_to_buy = tickets_to_buy;
       top.amount = asset( asset_obj.lottery_options->ticket_price.amount * tickets_to_buy, asset_obj.lottery_options->ticket_price.asset_id );
-      
+
       signed_transaction tx;
       tx.operations.push_back( top );
       set_operation_fees( tx, _remote_db->get_global_properties().parameters.current_fees);
@@ -1644,8 +1644,8 @@ public:
 
       return sign_transaction( tx, true );
    } FC_CAPTURE_AND_RETHROW( (lottery)(tickets_to_buy) ) }
-   
-   
+
+
    signed_transaction update_asset(string symbol,
                                    optional<string> new_issuer,
                                    asset_options new_options,
@@ -2456,13 +2456,13 @@ public:
       fc::optional<vesting_balance_id_type> vbid = maybe_id<vesting_balance_id_type>(witness_name);
       if( !vbid )
       {
-         if (is_witness(witness_name)) 
+         if (is_witness(witness_name))
          {
             witness_object wit = get_witness( witness_name );
             FC_ASSERT( wit.pay_vb, "Account ${account} has no core Token ${TOKEN} vested and thus its not allowed to withdraw.", ("account", witness_name)("TOKEN", GRAPHENE_SYMBOL));
             vbid = wit.pay_vb;
          }
-         else 
+         else
             FC_THROW("Account ${account} has no core Token ${TOKEN} vested and thus its not allowed to withdraw.", ("account", witness_name)("TOKEN", GRAPHENE_SYMBOL));
       }
 
@@ -2505,14 +2505,14 @@ public:
       if( !vbid )
       {
          vbos = _remote_db->get_vesting_balances( account_name );
-         if( vbos.size() == 0 ) 
+         if( vbos.size() == 0 )
             FC_THROW("Account ${account} has no core TOKEN vested and thus its not allowed to withdraw.", ("account", account_name));
       }
 
-      //whether it is a witness or user, keep it in a container and iterate over to process all vesting balances and types 
+      //whether it is a witness or user, keep it in a container and iterate over to process all vesting balances and types
       if(!vbos.size())
          vbos.emplace_back( get_object<vesting_balance_object>(*vbid) );
- 
+
       for (const vesting_balance_object& vesting_balance_obj: vbos) {
          if(vesting_balance_obj.balance_type == vesting_balance_type::gpos)
          {
@@ -2542,7 +2542,7 @@ public:
                                         bool broadcast /* = false */)
    { try {
       std::vector<vesting_balance_object_with_info> vbo_info = get_vesting_balances(voting_account);
-      
+
       time_point_sec now = time_point::now();
       if(now >= HARDFORK_GPOS_TIME)  //can be removed after GPOS HARDFORK time pass
       {
@@ -2569,7 +2569,7 @@ public:
             const auto vesting_subperiod = _remote_db->get_global_properties().parameters.gpos_subperiod();
             const auto gpos_start_time = fc::time_point_sec(_remote_db->get_global_properties().parameters.gpos_period_start());
             const auto subperiod_start_time = gpos_start_time.sec_since_epoch() + (gpos_info.current_subperiod - 1) * vesting_subperiod;
-            
+
             if (!insert_result.second && (gpos_info.last_voted_time.sec_since_epoch() >= subperiod_start_time))
                FC_THROW("Account ${account} was already voting for committee_member ${committee_member} in the current GPOS sub-period", ("account", voting_account)("committee_member", committee_member));
             else
@@ -2695,7 +2695,7 @@ public:
                                        bool broadcast /* = false */)
    { try {
       std::vector<vesting_balance_object_with_info> vbo_info = get_vesting_balances(voting_account);
-      
+
       time_point_sec now = time_point::now();
       if(now >= HARDFORK_GPOS_TIME)  //can be removed after GPOS HARDFORK time pass
       {
@@ -2706,7 +2706,7 @@ public:
       }
 
       account_object voting_account_object = get_account(voting_account);
-      
+
       fc::optional<witness_object> witness_obj = _remote_db->get_witness_by_account(witness);
       if (!witness_obj)
          FC_THROW("Account ${witness} is not registered as a witness", ("witness", witness));
@@ -2722,7 +2722,7 @@ public:
             const auto vesting_subperiod = _remote_db->get_global_properties().parameters.gpos_subperiod();
             const auto gpos_start_time = fc::time_point_sec(_remote_db->get_global_properties().parameters.gpos_period_start());
             const auto subperiod_start_time = gpos_start_time.sec_since_epoch() + (gpos_info.current_subperiod - 1) * vesting_subperiod;
-        
+
             if (!insert_result.second && (gpos_info.last_voted_time.sec_since_epoch() >= subperiod_start_time))
                FC_THROW("Account ${account} was already voting for witness ${witness} in the current GPOS sub-period", ("account", voting_account)("witness", witness));
             else
@@ -2740,7 +2740,7 @@ public:
          if (!votes_removed)
             FC_THROW("Account ${account} has not voted for witness ${witness}", ("account", voting_account)("witness", witness));
       }
-      
+
       account_update_operation account_update_op;
       account_update_op.account = voting_account_object.id;
       account_update_op.new_options = voting_account_object.options;
@@ -3349,7 +3349,7 @@ public:
                {
                   unsigned row_offset = (1 << round) - 1;
                   unsigned row_vertical_spacing = 1 << (round + 1);
-                  if (row >= row_offset && 
+                  if (row >= row_offset &&
                       (row - row_offset) % row_vertical_spacing == 0)
                   {
                      unsigned player_number_in_round = (row - row_offset) / row_vertical_spacing;
@@ -3363,7 +3363,7 @@ public:
                      if (round == num_rounds)
                      {
                         match_object match = get_object<match_object>(tournament_details.matches[num_matches - 1]);
-                        if (match.get_state() == match_state::match_complete && 
+                        if (match.get_state() == match_state::match_complete &&
                             !match.match_winners.empty())
                         {
                            assert(match.match_winners.size() == 1);
@@ -3819,6 +3819,38 @@ public:
       return _remote_db->get_active_custom_account_authorities_by_operation(get_account(owner).id, operation_type);
    }
 
+   vector<uint64_t> get_random_number_ex(string account,
+                                         uint64_t minimum,
+                                         uint64_t maximum,
+                                         uint64_t selections,
+                                         bool duplicates,
+                                         bool broadcast)
+   {
+
+      vector<uint64_t> v = _remote_db->get_random_number_ex(minimum, maximum, selections, duplicates);
+
+      random_number_store_operation op;
+      op.account = get_account(account).id;
+      op.random_number = v;
+      op.data = "";
+
+      signed_transaction trx;
+      trx.operations.push_back(op);
+      set_operation_fees( trx, _remote_db->get_global_properties().parameters.current_fees );
+      trx.validate();
+      sign_transaction( trx, broadcast );
+
+      return v;
+   }
+
+   uint64_t get_random_number(string account,
+                              uint64_t bound,
+                              bool broadcast)
+   {
+      vector<uint64_t> v = get_random_number_ex(account, 0, bound, 1, false, broadcast);
+      return v.at(0);
+   }
+
    void dbg_make_uia(string creator, string symbol)
    {
       asset_options opts;
@@ -4176,7 +4208,7 @@ std::string operation_printer::operator()(const bet_place_operation& op)const
    auto asset = wallet.get_asset(op.amount_to_bet.asset_id);
    auto bettor = wallet.get_account(op.bettor_id);
 
-   out << bettor.name << " placed a " << fc::json::to_string(op.back_or_lay) << " bet for " 
+   out << bettor.name << " placed a " << fc::json::to_string(op.back_or_lay) << " bet for "
        << asset.amount_to_pretty_string(op.amount_to_bet) << " at odds " << ((double)op.backer_multiplier /  GRAPHENE_BETTING_ODDS_PRECISION)
        << " on market " << fc::json::to_string(op.betting_market_id)
        << " fee: " << fee_asset.amount_to_pretty_string(op.fee);
@@ -4319,7 +4351,7 @@ vector<asset_object> wallet_api::get_account_lotteries(  account_id_type issuer,
    return my->_remote_db->get_account_lotteries( issuer, stop, limit, start );
 }
 
-asset wallet_api::get_lottery_balance( asset_id_type lottery_id )const 
+asset wallet_api::get_lottery_balance( asset_id_type lottery_id )const
 {
    return my->_remote_db->get_lottery_balance( lottery_id );
 }
@@ -4327,7 +4359,7 @@ asset wallet_api::get_lottery_balance( asset_id_type lottery_id )const
 vector<operation_detail> wallet_api::get_account_history(string name, int limit) const
 {
    vector<operation_detail> result;
-   
+
    while (limit > 0)
    {
       bool skip_first_row = false;
@@ -4378,9 +4410,9 @@ vector<operation_detail> wallet_api::get_account_history(string name, int limit)
 
 vector<operation_detail> wallet_api::get_relative_account_history(string name, uint32_t stop, int limit, uint32_t start)const
 {
-   
+
    FC_ASSERT( start > 0 || limit <= 100 );
-   
+
    vector<operation_detail> result;
 
    while( limit > 0 )
@@ -5352,6 +5384,23 @@ vector<authority> wallet_api::get_active_custom_account_authorities_by_operation
    return my->get_active_custom_account_authorities_by_operation(owner, operation_type);
 }
 
+vector<uint64_t> wallet_api::get_random_number_ex(string account,
+                                                  uint64_t minimum,
+                                                  uint64_t maximum,
+                                                  uint64_t selections,
+                                                  bool duplicates,
+                                                  bool broadcast)
+{
+   return my->get_random_number_ex( account, minimum, maximum, selections, duplicates, broadcast );
+}
+
+uint64_t wallet_api::get_random_number(string account,
+                                       uint64_t bound,
+                                       bool broadcast)
+{
+   return my->get_random_number( account, bound, broadcast );
+}
+
 global_property_object wallet_api::get_global_properties() const
 {
    return my->get_global_properties();
@@ -6353,22 +6402,22 @@ signed_transaction wallet_api::propose_delete_sport(
 {
     FC_ASSERT( !is_locked() );
     const chain_parameters& current_params = get_global_properties().parameters;
-    
+
     sport_delete_operation sport_delete_op;
     sport_delete_op.sport_id = sport_id;
-    
+
     proposal_create_operation prop_op;
     prop_op.expiration_time = expiration_time;
     prop_op.review_period_seconds = current_params.committee_proposal_review_period;
     prop_op.fee_paying_account = get_account(proposing_account).id;
     prop_op.proposed_ops.emplace_back( sport_delete_op );
     current_params.current_fees->set_fee( prop_op.proposed_ops.back().op );
-    
+
     signed_transaction tx;
     tx.operations.push_back(prop_op);
     my->set_operation_fees(tx, current_params.current_fees);
     tx.validate();
-    
+
     return my->sign_transaction(tx, broadcast);
 }
 
@@ -6431,7 +6480,7 @@ signed_transaction wallet_api::propose_update_event_group(
 
     return my->sign_transaction(tx, broadcast);
 }
-    
+
 signed_transaction wallet_api::propose_delete_event_group(
         const string& proposing_account,
         fc::time_point_sec expiration_time,
@@ -6440,22 +6489,22 @@ signed_transaction wallet_api::propose_delete_event_group(
 {
     FC_ASSERT( !is_locked() );
     const chain_parameters& current_params = get_global_properties().parameters;
-    
+
     event_group_delete_operation event_group_delete_op;
     event_group_delete_op.event_group_id = event_group;
-    
+
     proposal_create_operation prop_op;
     prop_op.expiration_time = expiration_time;
     prop_op.review_period_seconds = current_params.committee_proposal_review_period;
     prop_op.fee_paying_account = get_account(proposing_account).id;
     prop_op.proposed_ops.emplace_back( event_group_delete_op );
     current_params.current_fees->set_fee( prop_op.proposed_ops.back().op );
-    
+
     signed_transaction tx;
     tx.operations.push_back(prop_op);
     my->set_operation_fees(tx, current_params.current_fees);
     tx.validate();
-    
+
     return my->sign_transaction(tx, broadcast);
 }
 
@@ -6840,10 +6889,10 @@ signed_transaction wallet_api::tournament_create( string creator, tournament_opt
    return my->sign_transaction( tx, broadcast );
 }
 
-signed_transaction wallet_api::tournament_join( string payer_account, 
-                                                string player_account, 
-                                                tournament_id_type tournament_id, 
-                                                string buy_in_amount, 
+signed_transaction wallet_api::tournament_join( string payer_account,
+                                                string player_account,
+                                                tournament_id_type tournament_id,
+                                                string buy_in_amount,
                                                 string buy_in_asset_symbol,
                                                 bool broadcast )
 {
@@ -6925,7 +6974,7 @@ signed_transaction wallet_api::rps_throw(game_id_type game_id,
    graphene::chain::game_object game_obj = my->get_object<graphene::chain::game_object>(game_id);
    graphene::chain::match_object match_obj = my->get_object<graphene::chain::match_object>(game_obj.match_id);
    graphene::chain::tournament_object tournament_obj = my->get_object<graphene::chain::tournament_object>(match_obj.tournament_id);
-   graphene::chain::rock_paper_scissors_game_options game_options = 
+   graphene::chain::rock_paper_scissors_game_options game_options =
       tournament_obj.options.game_options.get<graphene::chain::rock_paper_scissors_game_options>();
    if ((int)gesture >= game_options.number_of_gestures)
       FC_THROW("Gesture ${gesture} not supported in this game", ("gesture", gesture));
@@ -6972,6 +7021,8 @@ signed_transaction wallet_api::nft_metadata_create(string owner_account_id_or_na
                                                    bool is_transferable,
                                                    bool is_sellable,
                                                    optional<account_role_id_type> role_id,
+                                                   optional<share_type> max_supply,
+                                                   optional<nft_lottery_options> lottery_options,
                                                    bool broadcast)
 {
    account_object owner_account = my->get_account(owner_account_id_or_name);
@@ -6995,6 +7046,8 @@ signed_transaction wallet_api::nft_metadata_create(string owner_account_id_or_na
    op.is_transferable = is_transferable;
    op.is_sellable = is_sellable;
    op.account_role = role_id;
+   op.max_supply = max_supply;
+   op.lottery_options = lottery_options;
 
    signed_transaction trx;
    trx.operations.push_back(op);
@@ -7178,6 +7231,21 @@ vector<nft_object> wallet_api::nft_get_all_tokens() const
    return my->_remote_db->nft_get_all_tokens();
 }
 
+signed_transaction wallet_api::nft_lottery_buy_ticket( nft_metadata_id_type lottery, account_id_type buyer, uint64_t tickets_to_buy, bool broadcast )
+{
+   nft_lottery_token_purchase_operation op;
+   op.lottery_id = lottery;
+   op.buyer = buyer;
+   op.tickets_to_buy = tickets_to_buy;
+
+   signed_transaction trx;
+   trx.operations.push_back(op);
+   my->set_operation_fees( trx, my->_remote_db->get_global_properties().parameters.current_fees );
+   trx.validate();
+
+   return my->sign_transaction( trx, broadcast );
+}
+
 signed_transaction wallet_api::create_offer(set<nft_id_type> item_ids,
                                              string issuer_accound_id_or_name,
                                              asset minimum_price,

tests/common/database_fixture.cpp

@@ -44,6 +44,7 @@
 #include <graphene/chain/event_object.hpp>
 #include <graphene/chain/tournament_object.hpp>
 #include <graphene/chain/offer_object.hpp>
+#include <graphene/chain/nft_object.hpp>
 
 #include <graphene/utilities/tempdir.hpp>
 
@@ -335,6 +336,14 @@ void database_fixture::verify_asset_supplies( const database& db )
       }
    }
 
+   for (const nft_metadata_object &o : db.get_index_type<nft_metadata_index>().indices())
+   {
+      if (o.lottery_data)
+      {
+         total_balances[o.get_lottery_jackpot(db).asset_id] += o.get_lottery_jackpot(db).amount;
+      }
+   }
+
    uint64_t sweeps_vestings = 0;
    for( const sweeps_vesting_balance_object& svbo: db.get_index_type< sweeps_vesting_balance_index >().indices() )
       sweeps_vestings += svbo.balance;

tests/tests/nft_lottery_tests.cpp

@@ -0,0 +1,842 @@
+/*
+ * Copyright (c) 2017 PBSA, Inc., and contributors.
+ *
+ * The MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <boost/test/unit_test.hpp>
+
+#include <graphene/chain/database.hpp>
+
+#include <fc/crypto/digest.hpp>
+#include <fc/crypto/elliptic.hpp>
+#include <fc/reflect/variant.hpp>
+
+#include "../common/database_fixture.hpp"
+
+#include <graphene/chain/hardfork.hpp>
+#include <graphene/chain/nft_object.hpp>
+
+using namespace graphene::chain;
+using namespace graphene::chain::test;
+
+BOOST_FIXTURE_TEST_SUITE(nft_lottery_tests, database_fixture)
+
+BOOST_AUTO_TEST_CASE(create_lottery_nft_md_test)
+{
+    try
+    {
+        generate_blocks(HARDFORK_NFT_TIME);
+        generate_block();
+        generate_block();
+        set_expiration(db, trx);
+        // Lottery Options
+        nft_metadata_id_type test_nft_md_id = db.get_index<nft_metadata_object>().get_next_id();
+        nft_lottery_options lottery_options;
+        lottery_options.benefactors.push_back(nft_lottery_benefactor(account_id_type(), 25 * GRAPHENE_1_PERCENT));
+        lottery_options.end_date = db.head_block_time() + fc::minutes(5);
+        lottery_options.ticket_price = asset(100);
+        lottery_options.winning_tickets = {5 * GRAPHENE_1_PERCENT, 5 * GRAPHENE_1_PERCENT, 5 * GRAPHENE_1_PERCENT, 10 * GRAPHENE_1_PERCENT, 10 * GRAPHENE_1_PERCENT, 10 * GRAPHENE_1_PERCENT, 10 * GRAPHENE_1_PERCENT, 10 * GRAPHENE_1_PERCENT, 10 * GRAPHENE_1_PERCENT};
+        //lottery_options.winning_tickets = { 75 * GRAPHENE_1_PERCENT };
+        lottery_options.is_active = test_nft_md_id.instance.value % 2 ? false : true;
+        lottery_options.ending_on_soldout = true;
+
+        {
+            BOOST_TEST_MESSAGE("Send nft_metadata_create_operation");
+            nft_metadata_create_operation op;
+            op.owner = account_id_type();
+            op.symbol = "NFTLOTTERY" + std::to_string(test_nft_md_id.instance.value);
+            op.base_uri = "http://nft.example.com";
+            op.is_transferable = true;
+            op.name = "NFTLOTTERY" + std::to_string(test_nft_md_id.instance.value);
+            op.max_supply = 200;
+            op.lottery_options = lottery_options;
+
+            trx.operations.push_back(std::move(op));
+            PUSH_TX(db, trx, ~0);
+        }
+        generate_block();
+
+        BOOST_TEST_MESSAGE("Check nft_metadata_create_operation results");
+
+        const auto &obj = test_nft_md_id(db);
+        BOOST_CHECK(obj.owner == account_id_type());
+        BOOST_CHECK(obj.name == "NFTLOTTERY" + std::to_string(test_nft_md_id.instance.value));
+        BOOST_CHECK(obj.symbol == "NFTLOTTERY" + std::to_string(test_nft_md_id.instance.value));
+        BOOST_CHECK(obj.base_uri == "http://nft.example.com");
+        BOOST_CHECK(obj.max_supply == share_type(200));
+        BOOST_CHECK(obj.is_lottery());
+        BOOST_CHECK(obj.get_token_current_supply(db) == share_type(0));
+        BOOST_CHECK(obj.get_lottery_jackpot(db) == asset());
+        BOOST_CHECK(obj.lottery_data->lottery_balance_id(db).sweeps_tickets_sold == share_type(0));
+    }
+    catch (fc::exception &e)
+    {
+        edump((e.to_detail_string()));
+        throw;
+    }
+}
+
+BOOST_AUTO_TEST_CASE(lottery_idx_test)
+{
+    try
+    {
+        // generate loterries with different end_dates and is_active_flag
+        for (int i = 0; i < 26; ++i)
+        {
+            generate_blocks(30);
+            graphene::chain::test::set_expiration(db, trx);
+            nft_metadata_id_type test_nft_md_id = db.get_index<nft_metadata_object>().get_next_id();
+            INVOKE(create_lottery_nft_md_test);
+            auto test_nft_md_obj = test_nft_md_id(db);
+        }
+
+        auto &test_nft_md_idx = db.get_index_type<nft_metadata_index>().indices().get<active_nft_lotteries>();
+        auto test_itr = test_nft_md_idx.begin();
+        bool met_not_active = false;
+        // check sorting
+        while (test_itr != test_nft_md_idx.end())
+        {
+            if (!met_not_active && (!test_itr->is_lottery() || !test_itr->lottery_data->lottery_options.is_active))
+                met_not_active = true;
+            FC_ASSERT(!met_not_active || met_not_active && (!test_itr->is_lottery() || !test_itr->lottery_data->lottery_options.is_active), "MET ACTIVE LOTTERY AFTER NOT ACTIVE");
+            ++test_itr;
+        }
+    }
+    catch (fc::exception &e)
+    {
+        edump((e.to_detail_string()));
+        throw;
+    }
+}
+
+BOOST_AUTO_TEST_CASE(tickets_purchase_test)
+{
+    try
+    {
+        nft_metadata_id_type test_nft_md_id = db.get_index<nft_metadata_object>().get_next_id();
+        nft_id_type test_nft_id = db.get_index<nft_object>().get_next_id();
+        INVOKE(create_lottery_nft_md_test);
+        auto &test_nft_md_obj = test_nft_md_id(db);
+
+        nft_lottery_token_purchase_operation tpo;
+        tpo.fee = asset();
+        tpo.buyer = account_id_type();
+        tpo.lottery_id = test_nft_md_obj.id;
+        tpo.tickets_to_buy = 1;
+        tpo.amount = asset(100);
+        trx.operations.push_back(std::move(tpo));
+        set_expiration(db, trx);
+        PUSH_TX(db, trx, ~0);
+        generate_block();
+        trx.operations.clear();
+        auto &test_nft_ticket = test_nft_id(db);
+        BOOST_CHECK(test_nft_md_obj.get_token_current_supply(db) == tpo.tickets_to_buy);
+        BOOST_CHECK(test_nft_ticket.owner == tpo.buyer);
+        BOOST_CHECK(test_nft_ticket.nft_metadata_id == test_nft_md_obj.id);
+    }
+    catch (fc::exception &e)
+    {
+        edump((e.to_detail_string()));
+        throw;
+    }
+}
+
+BOOST_AUTO_TEST_CASE(tickets_purchase_fail_test)
+{
+    try
+    {
+        nft_metadata_id_type test_nft_md_id = db.get_index<nft_metadata_object>().get_next_id();
+        INVOKE(create_lottery_nft_md_test);
+        auto &test_nft_md_obj = test_nft_md_id(db);
+
+        nft_lottery_token_purchase_operation tpo;
+        tpo.fee = asset();
+        tpo.buyer = account_id_type();
+        tpo.lottery_id = test_nft_md_obj.id;
+        tpo.tickets_to_buy = 2;
+        tpo.amount = asset(100);
+        trx.operations.push_back(tpo);
+        BOOST_REQUIRE_THROW(PUSH_TX(db, trx, ~0), fc::exception); // amount/tickets_to_buy != price
+        trx.operations.clear();
+
+        tpo.amount = asset(205);
+        trx.operations.push_back(tpo);
+        BOOST_REQUIRE_THROW(PUSH_TX(db, trx, ~0), fc::exception); // amount/tickets_to_buy != price
+
+        tpo.amount = asset(200, asset_id_type(1));
+        trx.operations.push_back(tpo);
+        BOOST_REQUIRE_THROW(PUSH_TX(db, trx, ~0), fc::exception); // trying to buy in other asset
+    }
+    catch (fc::exception &e)
+    {
+        edump((e.to_detail_string()));
+        throw;
+    }
+}
+
+BOOST_AUTO_TEST_CASE(lottery_end_by_stage_test)
+{
+    try
+    {
+        nft_metadata_id_type test_nft_md_id = db.get_index<nft_metadata_object>().get_next_id();
+        INVOKE(create_lottery_nft_md_test);
+        auto test_nft_md_obj = test_nft_md_id(db);
+        for (int i = 1; i < 17; ++i)
+        {
+            if (i == 4 || i == 1 || i == 16 || i == 15)
+                continue;
+            if (i != 0)
+                transfer(account_id_type(), account_id_type(i), asset(100000));
+            nft_lottery_token_purchase_operation tpo;
+            tpo.fee = asset();
+            tpo.buyer = account_id_type(i);
+            tpo.lottery_id = test_nft_md_obj.id;
+            tpo.tickets_to_buy = i;
+            tpo.amount = asset(100 * (i));
+            trx.operations.push_back(std::move(tpo));
+            set_expiration(db, trx);
+            PUSH_TX(db, trx, ~0);
+            generate_block();
+            trx.operations.clear();
+        }
+
+        test_nft_md_obj = test_nft_md_id(db);
+        uint64_t benefactor_balance_before_end = db.get_balance(account_id_type(), asset_id_type()).amount.value;
+        uint64_t jackpot = test_nft_md_obj.get_lottery_jackpot(db).amount.value;
+        uint16_t winners_part = 0;
+        for (uint16_t win : test_nft_md_obj.lottery_data->lottery_options.winning_tickets)
+            winners_part += win;
+
+        uint16_t participants_percents_sum = 0;
+        auto participants = test_nft_md_obj.distribute_winners_part(db);
+        for (auto p : participants)
+        {
+            for (auto e : p.second)
+            {
+                participants_percents_sum += e;
+            }
+        }
+
+        test_nft_md_obj = test_nft_md_id(db);
+        BOOST_CHECK(participants_percents_sum == winners_part);
+        BOOST_CHECK(test_nft_md_obj.get_lottery_jackpot(db).amount.value == (jackpot * (GRAPHENE_100_PERCENT - winners_part) / (double)GRAPHENE_100_PERCENT) + jackpot * winners_part * SWEEPS_DEFAULT_DISTRIBUTION_PERCENTAGE / (double)GRAPHENE_100_PERCENT / (double)GRAPHENE_100_PERCENT);
+        test_nft_md_obj.distribute_benefactors_part(db);
+        test_nft_md_obj = test_nft_md_id(db);
+        BOOST_CHECK(test_nft_md_obj.get_lottery_jackpot(db).amount.value == jackpot * SWEEPS_DEFAULT_DISTRIBUTION_PERCENTAGE / (double)GRAPHENE_100_PERCENT * winners_part / (double)GRAPHENE_100_PERCENT);
+        test_nft_md_obj.distribute_sweeps_holders_part(db);
+        test_nft_md_obj = test_nft_md_id(db);
+        BOOST_CHECK(test_nft_md_obj.get_lottery_jackpot(db).amount.value == 0);
+
+        uint64_t benefactor_recieved = db.get_balance(account_id_type(), asset_id_type()).amount.value - benefactor_balance_before_end;
+        BOOST_CHECK(jackpot * test_nft_md_obj.lottery_data->lottery_options.benefactors[0].share / GRAPHENE_100_PERCENT == benefactor_recieved);
+    }
+    catch (fc::exception &e)
+    {
+        edump((e.to_detail_string()));
+        throw;
+    }
+}
+
+BOOST_AUTO_TEST_CASE(lottery_end_by_stage_with_fractional_test)
+{
+
+    try
+    {
+        nft_metadata_id_type test_nft_md_id = db.get_index<nft_metadata_object>().get_next_id();
+        INVOKE(create_lottery_nft_md_test);
+        db.modify(test_nft_md_id(db), [&](nft_metadata_object &obj) {
+            obj.lottery_data->lottery_options.is_active = true;
+        });
+        auto test_nft_md_obj = test_nft_md_id(db);
+
+        for (int i = 1; i < 17; ++i)
+        {
+            if (i == 4)
+                continue;
+            if (i != 0)
+                transfer(account_id_type(), account_id_type(i), asset(100000));
+            nft_lottery_token_purchase_operation tpo;
+            tpo.fee = asset();
+            tpo.buyer = account_id_type(i);
+            tpo.lottery_id = test_nft_md_obj.id;
+            tpo.tickets_to_buy = i;
+            tpo.amount = asset(100 * (i));
+            trx.operations.push_back(std::move(tpo));
+            set_expiration(db, trx);
+            PUSH_TX(db, trx, ~0);
+            generate_block();
+            trx.operations.clear();
+        }
+        test_nft_md_obj = test_nft_md_id(db);
+        uint64_t benefactor_balance_before_end = db.get_balance(account_id_type(), asset_id_type()).amount.value;
+        uint64_t jackpot = test_nft_md_obj.get_lottery_jackpot(db).amount.value;
+        uint16_t winners_part = 0;
+        for (uint16_t win : test_nft_md_obj.lottery_data->lottery_options.winning_tickets)
+            winners_part += win;
+
+        uint16_t participants_percents_sum = 0;
+        auto participants = test_nft_md_obj.distribute_winners_part(db);
+        for (auto p : participants)
+            for (auto e : p.second)
+                participants_percents_sum += e;
+
+        BOOST_CHECK(participants_percents_sum == winners_part);
+        // balance should be bigger than expected because of rouning during distribution
+        test_nft_md_obj = test_nft_md_id(db);
+        BOOST_CHECK(test_nft_md_obj.get_lottery_jackpot(db).amount.value > (jackpot * (GRAPHENE_100_PERCENT - winners_part) / (double)GRAPHENE_100_PERCENT) + jackpot * winners_part * SWEEPS_DEFAULT_DISTRIBUTION_PERCENTAGE / (double)GRAPHENE_100_PERCENT / (double)GRAPHENE_100_PERCENT);
+        test_nft_md_obj.distribute_benefactors_part(db);
+        test_nft_md_obj = test_nft_md_id(db);
+        BOOST_CHECK(test_nft_md_obj.get_lottery_jackpot(db).amount.value > jackpot * SWEEPS_DEFAULT_DISTRIBUTION_PERCENTAGE / (double)GRAPHENE_100_PERCENT * winners_part / (double)GRAPHENE_100_PERCENT);
+        test_nft_md_obj.distribute_sweeps_holders_part(db);
+        test_nft_md_obj = test_nft_md_id(db);
+        // but at the end is always equals 0
+        BOOST_CHECK(test_nft_md_obj.get_lottery_jackpot(db).amount.value == 0);
+
+        uint64_t benefactor_recieved = db.get_balance(account_id_type(), asset_id_type()).amount.value - benefactor_balance_before_end;
+        test_nft_md_obj = test_nft_md_id(db);
+        BOOST_CHECK(jackpot * test_nft_md_obj.lottery_data->lottery_options.benefactors[0].share / GRAPHENE_100_PERCENT == benefactor_recieved);
+    }
+    catch (fc::exception &e)
+    {
+        edump((e.to_detail_string()));
+        throw;
+    }
+}
+
+BOOST_AUTO_TEST_CASE(lottery_end_test)
+{
+    try
+    {
+        nft_metadata_id_type test_nft_md_id = db.get_index<nft_metadata_object>().get_next_id();
+        INVOKE(create_lottery_nft_md_test);
+        auto test_nft_md_obj = test_nft_md_id(db);
+        for (int i = 1; i < 17; ++i)
+        {
+            if (i == 4 || i == 1 || i == 16 || i == 15)
+                continue;
+            if (i != 0)
+                transfer(account_id_type(), account_id_type(i), asset(100000));
+            nft_lottery_token_purchase_operation tpo;
+            tpo.fee = asset();
+            tpo.buyer = account_id_type(i);
+            tpo.lottery_id = test_nft_md_obj.id;
+            tpo.tickets_to_buy = i;
+            tpo.amount = asset(100 * (i));
+            trx.operations.push_back(std::move(tpo));
+            set_expiration(db, trx);
+            PUSH_TX(db, trx, ~0);
+            trx.operations.clear();
+        }
+        generate_block();
+        test_nft_md_obj = test_nft_md_id(db);
+        uint64_t creator_balance_before_end = db.get_balance(account_id_type(), asset_id_type()).amount.value;
+        uint64_t jackpot = test_nft_md_obj.get_lottery_jackpot(db).amount.value;
+        uint16_t winners_part = 0;
+        for (uint8_t win : test_nft_md_obj.lottery_data->lottery_options.winning_tickets)
+            winners_part += win;
+
+        while (db.head_block_time() < (test_nft_md_obj.lottery_data->lottery_options.end_date + fc::seconds(30)))
+            generate_block();
+        test_nft_md_obj = test_nft_md_id(db);
+        BOOST_CHECK(test_nft_md_obj.get_lottery_jackpot(db).amount.value == 0);
+        uint64_t creator_recieved = db.get_balance(account_id_type(), asset_id_type()).amount.value - creator_balance_before_end;
+        BOOST_CHECK(jackpot * test_nft_md_obj.lottery_data->lottery_options.benefactors[0].share / GRAPHENE_100_PERCENT == creator_recieved);
+    }
+    catch (fc::exception &e)
+    {
+        edump((e.to_detail_string()));
+        throw;
+    }
+}
+
+BOOST_AUTO_TEST_CASE(claim_sweeps_vesting_balance_test)
+{
+    try
+    {
+        nft_metadata_id_type test_nft_md_id = db.get_index<nft_metadata_object>().get_next_id();
+        INVOKE(lottery_end_test);
+        auto test_nft_md_obj = test_nft_md_id(db);
+        account_id_type benefactor = test_nft_md_obj.lottery_data->lottery_options.benefactors[0].id;
+        const auto &svbo_index = db.get_index_type<sweeps_vesting_balance_index>().indices().get<by_owner>();
+        auto benefactor_svbo = svbo_index.find(benefactor);
+        BOOST_CHECK(benefactor_svbo != svbo_index.end());
+
+        auto balance_before_claim = db.get_balance(benefactor, SWEEPS_DEFAULT_DISTRIBUTION_ASSET);
+        auto available_for_claim = benefactor_svbo->available_for_claim();
+        sweeps_vesting_claim_operation claim;
+        claim.account = benefactor;
+        claim.amount_to_claim = available_for_claim;
+        trx.clear();
+        graphene::chain::test::set_expiration(db, trx);
+        trx.operations.push_back(claim);
+        PUSH_TX(db, trx, ~0);
+        generate_block();
+
+        BOOST_CHECK(db.get_balance(benefactor, SWEEPS_DEFAULT_DISTRIBUTION_ASSET) - balance_before_claim == available_for_claim);
+        benefactor_svbo = svbo_index.find(benefactor);
+        BOOST_CHECK(benefactor_svbo->available_for_claim().amount == 0);
+    }
+    catch (fc::exception &e)
+    {
+        edump((e.to_detail_string()));
+        throw;
+    }
+}
+
+BOOST_AUTO_TEST_CASE(more_winners_then_participants_test)
+{
+    try
+    {
+        nft_metadata_id_type test_nft_md_id = db.get_index<nft_metadata_object>().get_next_id();
+        INVOKE(create_lottery_nft_md_test);
+        auto test_nft_md_obj = test_nft_md_id(db);
+        for (int i = 1; i < 4; ++i)
+        {
+            if (i == 4)
+                continue;
+            if (i != 0)
+                transfer(account_id_type(), account_id_type(i), asset(1000000));
+            nft_lottery_token_purchase_operation tpo;
+            tpo.fee = asset();
+            tpo.buyer = account_id_type(i);
+            tpo.lottery_id = test_nft_md_obj.id;
+            tpo.tickets_to_buy = 1;
+            tpo.amount = asset(100);
+            trx.operations.push_back(std::move(tpo));
+            set_expiration(db, trx);
+            PUSH_TX(db, trx, ~0);
+            trx.operations.clear();
+        }
+        generate_block();
+        test_nft_md_obj = test_nft_md_id(db);
+        auto holders = test_nft_md_obj.get_holders(db);
+        auto participants = test_nft_md_obj.distribute_winners_part(db);
+        test_nft_md_obj = test_nft_md_id(db);
+        test_nft_md_obj.distribute_benefactors_part(db);
+        test_nft_md_obj = test_nft_md_id(db);
+        test_nft_md_obj.distribute_sweeps_holders_part(db);
+        test_nft_md_obj = test_nft_md_id(db);
+        generate_block();
+        for (auto p : participants)
+        {
+            idump((get_operation_history(p.first)));
+        }
+        auto benefactor_history = get_operation_history(account_id_type());
+        for (auto h : benefactor_history)
+        {
+            idump((h));
+        }
+    }
+    catch (fc::exception &e)
+    {
+        edump((e.to_detail_string()));
+        throw;
+    }
+}
+
+BOOST_AUTO_TEST_CASE(ending_by_date_test)
+{
+    try
+    {
+        nft_metadata_id_type test_nft_md_id = db.get_index<nft_metadata_object>().get_next_id();
+        INVOKE(create_lottery_nft_md_test);
+        auto test_nft_md_obj = test_nft_md_id(db);
+        for (int i = 1; i < 4; ++i)
+        {
+            if (i == 4)
+                continue;
+            if (i != 0)
+                transfer(account_id_type(), account_id_type(i), asset(1000000));
+            nft_lottery_token_purchase_operation tpo;
+            tpo.fee = asset();
+            tpo.buyer = account_id_type(i);
+            tpo.lottery_id = test_nft_md_obj.id;
+            tpo.tickets_to_buy = 1;
+            tpo.amount = asset(100);
+            trx.operations.push_back(std::move(tpo));
+            set_expiration(db, trx);
+            PUSH_TX(db, trx, ~0);
+            trx.operations.clear();
+        }
+        generate_block();
+        test_nft_md_obj = test_nft_md_id(db);
+        auto holders = test_nft_md_obj.get_holders(db);
+        idump((test_nft_md_obj.get_lottery_jackpot(db)));
+        while (db.head_block_time() < (test_nft_md_obj.lottery_data->lottery_options.end_date + fc::seconds(30)))
+            generate_block();
+        test_nft_md_obj = test_nft_md_id(db);
+        idump((test_nft_md_obj.get_lottery_jackpot(db)));
+        vector<account_id_type> participants = {account_id_type(1), account_id_type(2), account_id_type(3)};
+        for (auto p : participants)
+        {
+            idump((get_operation_history(p)));
+        }
+        auto benefactor_history = get_operation_history(account_id_type());
+        for (auto h : benefactor_history)
+        {
+            if (h.op.which() == operation::tag<lottery_reward_operation>::value)
+            {
+                auto reward_op = h.op.get<lottery_reward_operation>();
+                idump((reward_op));
+                BOOST_CHECK(reward_op.is_benefactor_reward);
+                BOOST_CHECK(reward_op.amount.amount.value == 75);
+                BOOST_CHECK(reward_op.amount.asset_id == test_nft_md_obj.lottery_data->lottery_options.ticket_price.asset_id);
+                break;
+            }
+        }
+    }
+    catch (fc::exception &e)
+    {
+        edump((e.to_detail_string()));
+        throw;
+    }
+}
+
+BOOST_AUTO_TEST_CASE(ending_by_participants_count_test)
+{
+    try
+    {
+        nft_metadata_id_type test_nft_md_id = db.get_index<nft_metadata_object>().get_next_id();
+        INVOKE(create_lottery_nft_md_test);
+        auto test_nft_md_obj = test_nft_md_id(db);
+        FC_ASSERT(test_nft_md_obj.lottery_data->lottery_options.is_active);
+        account_id_type buyer(3);
+        transfer(account_id_type(), buyer, asset(10000000));
+        nft_lottery_token_purchase_operation tpo;
+        tpo.fee = asset();
+        tpo.buyer = buyer;
+        tpo.lottery_id = test_nft_md_obj.id;
+        tpo.tickets_to_buy = 200;
+        tpo.amount = asset(200 * 100);
+        trx.operations.push_back(tpo);
+        set_expiration(db, trx);
+        PUSH_TX(db, trx, ~0);
+        trx.operations.clear();
+        generate_block();
+        test_nft_md_obj = test_nft_md_id(db);
+        FC_ASSERT(!test_nft_md_obj.lottery_data->lottery_options.is_active);
+    }
+    catch (fc::exception &e)
+    {
+        edump((e.to_detail_string()));
+        throw;
+    }
+}
+
+BOOST_AUTO_TEST_CASE(try_to_end_empty_lottery_test)
+{
+    try
+    {
+        nft_metadata_id_type test_nft_md_id = db.get_index<nft_metadata_object>().get_next_id();
+        INVOKE(create_lottery_nft_md_test);
+        auto test_nft_md_obj = test_nft_md_id(db);
+        while (db.head_block_time() < (test_nft_md_obj.lottery_data->lottery_options.end_date + fc::seconds(30)))
+            generate_block();
+        test_nft_md_obj = test_nft_md_id(db);
+        BOOST_CHECK(!test_nft_md_obj.lottery_data->lottery_options.is_active);
+    }
+    catch (fc::exception &e)
+    {
+        edump((e.to_detail_string()));
+        throw;
+    }
+}
+
+BOOST_AUTO_TEST_CASE(lottery_winner_ticket_id_test)
+{
+    try
+    {
+        nft_metadata_id_type test_nft_md_id = db.get_index<nft_metadata_object>().get_next_id();
+        INVOKE(create_lottery_nft_md_test);
+        auto test_nft_md_obj = test_nft_md_id(db);
+        for (int i = 1; i < 4; ++i)
+        {
+            transfer(account_id_type(), account_id_type(i), asset(2000000));
+        }
+        for (int i = 1; i < 4; ++i)
+        {
+            if (i == 4)
+                continue;
+            nft_lottery_token_purchase_operation tpo;
+            tpo.buyer = account_id_type(i);
+            tpo.lottery_id = test_nft_md_obj.id;
+            tpo.tickets_to_buy = 1;
+            tpo.amount = asset(100);
+            trx.operations.push_back(std::move(tpo));
+            set_expiration(db, trx);
+            PUSH_TX(db, trx, ~0);
+            trx.operations.clear();
+        }
+
+        for (int i = 1; i < 4; ++i)
+        {
+            if (i == 4)
+                continue;
+            nft_lottery_token_purchase_operation tpo;
+            tpo.buyer = account_id_type(i);
+            tpo.lottery_id = test_nft_md_obj.id;
+            tpo.tickets_to_buy = 1;
+            tpo.amount = asset(100);
+            trx.operations.push_back(std::move(tpo));
+            set_expiration(db, trx);
+            PUSH_TX(db, trx, ~0);
+            trx.operations.clear();
+        }
+        generate_block();
+        test_nft_md_obj = test_nft_md_id(db);
+        uint64_t creator_balance_before_end = db.get_balance(account_id_type(), asset_id_type()).amount.value;
+        uint64_t jackpot = test_nft_md_obj.get_lottery_jackpot(db).amount.value;
+        uint16_t winners_part = 0;
+        for (uint8_t win : test_nft_md_obj.lottery_data->lottery_options.winning_tickets)
+            winners_part += win;
+
+        while (db.head_block_time() < (test_nft_md_obj.lottery_data->lottery_options.end_date))
+            generate_block();
+        auto op_history = get_operation_history(account_id_type(1)); //Can observe operation 79 to verify winner ticket number
+        for (auto h : op_history)
+        {
+            idump((h));
+        }
+        test_nft_md_obj = test_nft_md_id(db);
+        BOOST_CHECK(test_nft_md_obj.get_lottery_jackpot(db).amount.value == 0);
+        uint64_t creator_recieved = db.get_balance(account_id_type(), asset_id_type()).amount.value - creator_balance_before_end;
+        BOOST_CHECK(jackpot * test_nft_md_obj.lottery_data->lottery_options.benefactors[0].share / GRAPHENE_100_PERCENT == creator_recieved);
+    }
+    catch (fc::exception &e)
+    {
+        edump((e.to_detail_string()));
+        throw;
+    }
+}
+
+BOOST_AUTO_TEST_CASE(create_lottery_nft_md_delete_tickets_on_draw_test)
+{
+    try
+    {
+        generate_blocks(HARDFORK_NFT_TIME);
+        generate_block();
+        generate_block();
+        set_expiration(db, trx);
+        // Lottery Options
+        nft_metadata_id_type test_nft_md_id = db.get_index<nft_metadata_object>().get_next_id();
+        nft_lottery_options lottery_options;
+        lottery_options.benefactors.push_back(nft_lottery_benefactor(account_id_type(), 25 * GRAPHENE_1_PERCENT));
+        lottery_options.end_date = db.head_block_time() + fc::minutes(5);
+        lottery_options.ticket_price = asset(100);
+        lottery_options.winning_tickets = {5 * GRAPHENE_1_PERCENT, 5 * GRAPHENE_1_PERCENT, 5 * GRAPHENE_1_PERCENT, 10 * GRAPHENE_1_PERCENT, 10 * GRAPHENE_1_PERCENT, 10 * GRAPHENE_1_PERCENT, 10 * GRAPHENE_1_PERCENT, 10 * GRAPHENE_1_PERCENT, 10 * GRAPHENE_1_PERCENT};
+        //lottery_options.winning_tickets = { 75 * GRAPHENE_1_PERCENT };
+        lottery_options.is_active = test_nft_md_id.instance.value % 2 ? false : true;
+        lottery_options.ending_on_soldout = true;
+        lottery_options.delete_tickets_after_draw = true;
+
+        {
+            BOOST_TEST_MESSAGE("Send nft_metadata_create_operation");
+            nft_metadata_create_operation op;
+            op.owner = account_id_type();
+            op.symbol = "NFTLOTTERY" + std::to_string(test_nft_md_id.instance.value);
+            op.base_uri = "http://nft.example.com";
+            op.is_transferable = true;
+            op.name = "NFTLOTTERY" + std::to_string(test_nft_md_id.instance.value);
+            op.max_supply = 200;
+            op.lottery_options = lottery_options;
+
+            trx.operations.push_back(std::move(op));
+            PUSH_TX(db, trx, ~0);
+            trx.operations.clear();
+        }
+        generate_block();
+
+        BOOST_TEST_MESSAGE("Check nft_metadata_create_operation results");
+
+        auto test_nft_md_obj = test_nft_md_id(db);
+        BOOST_CHECK(test_nft_md_obj.owner == account_id_type());
+        BOOST_CHECK(test_nft_md_obj.name == "NFTLOTTERY" + std::to_string(test_nft_md_id.instance.value));
+        BOOST_CHECK(test_nft_md_obj.symbol == "NFTLOTTERY" + std::to_string(test_nft_md_id.instance.value));
+        BOOST_CHECK(test_nft_md_obj.base_uri == "http://nft.example.com");
+        BOOST_CHECK(test_nft_md_obj.max_supply == share_type(200));
+        BOOST_CHECK(test_nft_md_obj.is_lottery());
+        BOOST_CHECK(test_nft_md_obj.get_token_current_supply(db) == share_type(0));
+        BOOST_CHECK(test_nft_md_obj.get_lottery_jackpot(db) == asset());
+        BOOST_CHECK(test_nft_md_obj.lottery_data->lottery_balance_id(db).sweeps_tickets_sold == share_type(0));
+
+        BOOST_CHECK(test_nft_md_obj.lottery_data->lottery_options.is_active);
+        account_id_type buyer(3);
+        transfer(account_id_type(), buyer, asset(10000000));
+        {
+            nft_lottery_token_purchase_operation tpo;
+            tpo.fee = asset();
+            tpo.buyer = buyer;
+            tpo.lottery_id = test_nft_md_obj.id;
+            tpo.tickets_to_buy = 199;
+            tpo.amount = asset(199 * 100);
+            trx.operations.push_back(tpo);
+            set_expiration(db, trx);
+            PUSH_TX(db, trx, ~0);
+            trx.operations.clear();
+        }
+        generate_block();
+        test_nft_md_obj = test_nft_md_id(db);
+        BOOST_CHECK(test_nft_md_obj.lottery_data->lottery_options.is_active);
+        BOOST_CHECK(test_nft_md_obj.get_token_current_supply(db) == 199);
+        {
+            nft_lottery_token_purchase_operation tpo;
+            tpo.fee = asset();
+            tpo.buyer = buyer;
+            tpo.lottery_id = test_nft_md_obj.id;
+            tpo.tickets_to_buy = 1;
+            tpo.amount = asset(1 * 100);
+            trx.operations.push_back(tpo);
+            set_expiration(db, trx);
+            PUSH_TX(db, trx, ~0);
+            trx.operations.clear();
+        }
+        generate_block();
+        test_nft_md_obj = test_nft_md_id(db);
+        BOOST_CHECK(!test_nft_md_obj.lottery_data->lottery_options.is_active);
+        BOOST_CHECK(test_nft_md_obj.get_token_current_supply(db) == 0);
+    }
+    catch (fc::exception &e)
+    {
+        edump((e.to_detail_string()));
+        throw;
+    }
+}
+
+BOOST_AUTO_TEST_CASE(create_lottery_nft_with_permission_test)
+{
+    try
+    {
+        generate_blocks(HARDFORK_NFT_TIME);
+        generate_block();
+        generate_block();
+        set_expiration(db, trx);
+        // Lottery Options
+        nft_metadata_id_type test_nft_md_id = db.get_index<nft_metadata_object>().get_next_id();
+        nft_lottery_options lottery_options;
+        lottery_options.benefactors.push_back(nft_lottery_benefactor(account_id_type(), 25 * GRAPHENE_1_PERCENT));
+        lottery_options.end_date = db.head_block_time() + fc::minutes(5);
+        lottery_options.ticket_price = asset(100);
+        lottery_options.winning_tickets = {5 * GRAPHENE_1_PERCENT, 5 * GRAPHENE_1_PERCENT, 5 * GRAPHENE_1_PERCENT, 10 * GRAPHENE_1_PERCENT, 10 * GRAPHENE_1_PERCENT, 10 * GRAPHENE_1_PERCENT, 10 * GRAPHENE_1_PERCENT, 10 * GRAPHENE_1_PERCENT, 10 * GRAPHENE_1_PERCENT};
+        //lottery_options.winning_tickets = { 75 * GRAPHENE_1_PERCENT };
+        lottery_options.is_active = test_nft_md_id.instance.value % 2 ? false : true;
+        lottery_options.ending_on_soldout = true;
+        lottery_options.delete_tickets_after_draw = true;
+
+        account_id_type buyer1(3);
+        account_id_type buyer2(6);
+        generate_block();
+        transfer(account_id_type(), buyer1, asset(1000000));
+        transfer(account_id_type(), buyer2, asset(1000000));
+        generate_block();
+
+        {
+            BOOST_TEST_MESSAGE("Send account_role_create_operation");
+
+            account_role_create_operation op;
+            op.owner = account_id_type();
+            op.name = "Test Account Role";
+            op.metadata = "{\"country\": \"earth\", \"race\": \"human\" }";
+
+            int ops[] = {operation::tag<nft_lottery_token_purchase_operation>::value};
+            op.allowed_operations.insert(ops, ops + 1);
+            op.whitelisted_accounts.emplace(buyer1);
+            op.valid_to = db.head_block_time() + 1000;
+
+            trx.operations.push_back(op);
+            PUSH_TX(db, trx, ~0);
+            trx.operations.clear();
+        }
+
+        {
+            BOOST_TEST_MESSAGE("Send nft_metadata_create_operation");
+            nft_metadata_create_operation op;
+            op.owner = account_id_type();
+            op.symbol = "NFTLOTTERY" + std::to_string(test_nft_md_id.instance.value);
+            op.base_uri = "http://nft.example.com";
+            op.is_transferable = true;
+            op.name = "NFTLOTTERY" + std::to_string(test_nft_md_id.instance.value);
+            op.max_supply = 200;
+            op.lottery_options = lottery_options;
+            op.account_role = account_role_id_type(0);
+
+            trx.operations.push_back(std::move(op));
+            PUSH_TX(db, trx, ~0);
+            trx.operations.clear();
+        }
+        generate_block();
+
+        BOOST_TEST_MESSAGE("Check nft_metadata_create_operation results");
+
+        auto test_nft_md_obj = test_nft_md_id(db);
+        BOOST_CHECK(test_nft_md_obj.owner == account_id_type());
+        BOOST_CHECK(test_nft_md_obj.name == "NFTLOTTERY" + std::to_string(test_nft_md_id.instance.value));
+        BOOST_CHECK(test_nft_md_obj.symbol == "NFTLOTTERY" + std::to_string(test_nft_md_id.instance.value));
+        BOOST_CHECK(test_nft_md_obj.base_uri == "http://nft.example.com");
+        BOOST_CHECK(test_nft_md_obj.max_supply == share_type(200));
+        BOOST_CHECK(test_nft_md_obj.is_lottery());
+        BOOST_CHECK(test_nft_md_obj.get_token_current_supply(db) == share_type(0));
+        BOOST_CHECK(test_nft_md_obj.get_lottery_jackpot(db) == asset());
+        BOOST_CHECK(test_nft_md_obj.lottery_data->lottery_balance_id(db).sweeps_tickets_sold == share_type(0));
+        BOOST_CHECK(test_nft_md_obj.account_role == account_role_id_type(0));
+
+        BOOST_CHECK(test_nft_md_obj.lottery_data->lottery_options.is_active);
+
+        {
+            nft_lottery_token_purchase_operation tpo;
+            tpo.fee = asset();
+            tpo.buyer = buyer1;
+            tpo.lottery_id = test_nft_md_obj.id;
+            tpo.tickets_to_buy = 199;
+            tpo.amount = asset(199 * 100);
+            trx.operations.push_back(tpo);
+            set_expiration(db, trx);
+            PUSH_TX(db, trx, ~0);
+            trx.operations.clear();
+        }
+        generate_block();
+        test_nft_md_obj = test_nft_md_id(db);
+        BOOST_CHECK(test_nft_md_obj.lottery_data->lottery_options.is_active);
+        BOOST_CHECK(test_nft_md_obj.get_token_current_supply(db) == 199);
+        {
+            nft_lottery_token_purchase_operation tpo;
+            tpo.fee = asset();
+            tpo.buyer = buyer2;
+            tpo.lottery_id = test_nft_md_obj.id;
+            tpo.tickets_to_buy = 1;
+            tpo.amount = asset(1 * 100);
+            trx.operations.push_back(tpo);
+            set_expiration(db, trx);
+            BOOST_CHECK_THROW(PUSH_TX(db, trx, ~0), fc::exception);
+            trx.operations.clear();
+        }
+        generate_block();
+        test_nft_md_obj = test_nft_md_id(db);
+        BOOST_CHECK(test_nft_md_obj.get_token_current_supply(db) == 199);
+    }
+    catch (fc::exception &e)
+    {
+        edump((e.to_detail_string()));
+        throw;
+    }
+}
+
+BOOST_AUTO_TEST_SUITE_END()