Introducing random number object, evaluator and operations

libraries/chain/CMakeLists.txt

@@ -115,6 +115,8 @@ add_library( graphene_chain
 
              affiliate_payout.cpp
 
+             random_number_evaluator.cpp
+
              ${HEADERS}
              ${PROTOCOL_HEADERS}
              "${CMAKE_CURRENT_BINARY_DIR}/include/graphene/chain/hardfork.hpp"

libraries/chain/db_init.cpp

@@ -49,6 +49,7 @@
 #include <graphene/chain/tournament_object.hpp>
 #include <graphene/chain/match_object.hpp>
 #include <graphene/chain/game_object.hpp>
+#include <graphene/chain/random_number_object.hpp>
 
 
 #include <graphene/chain/sport_object.hpp>
@@ -77,6 +78,7 @@
 #include <graphene/chain/event_evaluator.hpp>
 #include <graphene/chain/betting_market_evaluator.hpp>
 #include <graphene/chain/tournament_evaluator.hpp>
+#include <graphene/chain/random_number_evaluator.hpp>
 
 #include <graphene/chain/protocol/fee_schedule.hpp>
 
@@ -169,6 +171,8 @@ const uint8_t betting_market_position_object::type_id;
 const uint8_t global_betting_statistics_object::space_id;
 const uint8_t global_betting_statistics_object::type_id;
 
+const uint8_t random_number_object::space_id;
+const uint8_t random_number_object::type_id;
 
 void database::initialize_evaluators()
 {
@@ -243,6 +247,7 @@ void database::initialize_evaluators()
    register_evaluator<lottery_reward_evaluator>();
    register_evaluator<lottery_end_evaluator>();
    register_evaluator<sweeps_vesting_claim_evaluator>();
+   register_evaluator<random_number_store_evaluator>();
 }
 
 void database::initialize_indexes()
@@ -313,6 +318,7 @@ void database::initialize_indexes()
    
    add_index< primary_index<lottery_balance_index                         > >();
    add_index< primary_index<sweeps_vesting_balance_index                  > >();
+   add_index< primary_index<random_number_index                           > >();
 
 }
 

libraries/chain/db_notify.cpp

@@ -293,6 +293,9 @@ struct get_impacted_account_visitor
    void operator()( const sweeps_vesting_claim_operation& op ) {
       _impacted.insert( op.account );
    }
+   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 )

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

@@ -45,6 +45,7 @@
 #include <graphene/chain/protocol/event.hpp>
 #include <graphene/chain/protocol/betting_market.hpp>
 #include <graphene/chain/protocol/tournament.hpp>
+#include <graphene/chain/protocol/random_number.hpp>
 
 namespace graphene { namespace chain {
 
@@ -135,7 +136,8 @@ namespace graphene { namespace chain {
             ticket_purchase_operation,
             lottery_reward_operation,
             lottery_end_operation,
-            sweeps_vesting_claim_operation
+            sweeps_vesting_claim_operation,
+            random_number_store_operation
          > operation;
 
    /// @} // operations group

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

@@ -0,0 +1,27 @@
+#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;
+      time_point_sec timestamp;
+      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)
+             (timestamp)
+             (random_number)
+             (data) )
+

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

@@ -171,6 +171,7 @@ namespace graphene { namespace chain {
       betting_market_group_object_type,
       betting_market_object_type,
       bet_object_type,
+      random_number_object_type,
       OBJECT_TYPE_COUNT ///< Sentry value which contains the number of different object types
    };
 
@@ -230,6 +231,7 @@ namespace graphene { namespace chain {
    class betting_market_group_object;
    class betting_market_object;
    class bet_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;
@@ -256,6 +258,7 @@ namespace graphene { namespace chain {
    typedef object_id< protocol_ids, betting_market_group_object_type, betting_market_group_object> betting_market_group_id_type;
    typedef object_id< protocol_ids, betting_market_object_type,     betting_market_object>        betting_market_id_type;
    typedef object_id< protocol_ids, bet_object_type,                bet_object>                   bet_id_type;
+   typedef object_id< protocol_ids, random_number_object_type,      random_number_object>         random_number_id_type;
 
    // implementation types
    class global_property_object;
@@ -436,6 +439,7 @@ FC_REFLECT_ENUM( graphene::chain::object_type,
                  (betting_market_group_object_type)
                  (betting_market_object_type)
                  (bet_object_type)
+                 (random_number_object_type)
                  (OBJECT_TYPE_COUNT)
                )
 FC_REFLECT_ENUM( graphene::chain::impl_object_type,
@@ -505,6 +509,7 @@ FC_REFLECT_TYPENAME( graphene::chain::fba_accumulator_id_type )
 FC_REFLECT_TYPENAME( graphene::chain::betting_market_position_id_type )
 FC_REFLECT_TYPENAME( graphene::chain::global_betting_statistics_id_type )
 FC_REFLECT_TYPENAME( graphene::chain::tournament_details_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 */
+         uint64_t random_number; /* random number */
+         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/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      = op.timestamp;
+         //obj.random_number  = op.random_number;
+         //obj.data           = op.data;
+   });
+   return new_random_number_object.id;
+} FC_CAPTURE_AND_RETHROW( (op) ) }
+
+} } // graphene::chain
+