market_evaluator.hpp

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/*
 * Copyright (c) 2015 Cryptonomex, 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.
 */
#pragma once
#include <graphene/chain/evaluator.hpp>
#include <graphene/chain/types.hpp>

namespace graphene { namespace chain {

   class account_object;
   class asset_object;
   class asset_bitasset_data_object;
   class call_order_object;
   class limit_order_object;
   class collateral_bid_object;

   class limit_order_create_evaluator : public evaluator<limit_order_create_evaluator>
   {
      public:
         using operation_type = limit_order_create_operation;

         void_result do_evaluate( const limit_order_create_operation& o );
         object_id_type do_apply( const limit_order_create_operation& o ) const;

         virtual void convert_fee() override;

         virtual void pay_fee() override;

      private:
         share_type                          _deferred_fee  = 0;
         asset                               _deferred_paid_fee;
         const account_object*               _seller        = nullptr;
         const asset_object*                 _sell_asset    = nullptr;
         const asset_object*                 _receive_asset = nullptr;
   };

   class limit_order_cancel_evaluator : public evaluator<limit_order_cancel_evaluator>
   {
      public:
         using operation_type = limit_order_cancel_operation;

         void_result do_evaluate( const limit_order_cancel_operation& o );
         asset do_apply( const limit_order_cancel_operation& o ) const;

      private:
         const limit_order_object* _order;
   };

   class call_order_update_evaluator : public evaluator<call_order_update_evaluator>
   {
      public:
         using operation_type = call_order_update_operation;

         void_result do_evaluate( const call_order_update_operation& o );
         object_id_type do_apply( const call_order_update_operation& o );

      private:
         bool _closing_order = false;
         const asset_object* _debt_asset = nullptr;
         const call_order_object* call_ptr = nullptr;
         share_type new_debt;
         share_type new_collateral;
         const asset_bitasset_data_object* _bitasset_data = nullptr;
         const asset_dynamic_data_object*  _dynamic_data_obj = nullptr;
   };

   class bid_collateral_evaluator : public evaluator<bid_collateral_evaluator>
   {
      public:
         using operation_type = bid_collateral_operation;

         void_result do_evaluate( const bid_collateral_operation& o );
         void_result do_apply( const bid_collateral_operation& o ) const;

      private:
         const asset_object* _debt_asset = nullptr;
         const asset_bitasset_data_object* _bitasset_data = nullptr;
         const collateral_bid_object* _bid = nullptr;
   };

} } // graphene::chain