[HF1] Implemented credit deals logic

libraries/app/database_api.cpp

@@ -79,6 +79,11 @@ class database_api_impl : public std::enable_shared_from_this<database_api_impl>
                                                                       uint32_t status
                                                                     ) const;
 
+      // Exchange rates request
+      map<string, string>           list_last_exchange_rates()const;
+      map< std::string, std::map< account_id_type, string >> list_current_exchange_rates()const;
+      graphene::chain::chain_parameters::ext::credit_options list_global_extensions()const;
+
       // Subscriptions
       void set_subscribe_callback( std::function<void(const variant&)> cb, bool notify_remove_create );
       void set_pending_transaction_callback( std::function<void(const variant&)> cb );
@@ -997,6 +1002,21 @@ vector<credit_object> database_api::fetch_credit_requests_stack( uint32_t from_i
                                              cyrrency_symbol, user_id, status );    
 }                                                                  
 
+map<string, string> database_api::list_last_exchange_rates()const
+{
+    return my->list_last_exchange_rates();
+}
+
+map< std::string, std::map< account_id_type, string >> database_api::list_current_exchange_rates()const
+{
+    return my->list_current_exchange_rates();
+}
+
+graphene::chain::chain_parameters::ext::credit_options database_api::list_global_extensions()const
+{
+    return my->list_global_extensions();
+}
+
 vector<credit_object> database_api_impl::list_credit_requests_stack( uint32_t limit )const
 {
    FC_ASSERT( limit <= 100 );
@@ -1104,6 +1124,44 @@ vector<credit_object> database_api_impl::fetch_credit_requests_stack( uint32_t f
    return result;    
 }                                        
 
+map<string, string> database_api_impl::list_last_exchange_rates()const
+{
+    const auto& exch_object = _db.get_index_type<exchange_rate_index>().indices().get<by_id>();
+
+    map<string, string> result;
+
+    for (auto const& x : (*exch_object.begin()).last_exchange_rate)
+    {
+        result[x.first] = std::to_string(x.second);
+    }
+
+   return result;    
+}
+
+map< std::string, std::map< account_id_type, string >> database_api_impl::list_current_exchange_rates()const
+{
+    const auto& exch_object = _db.get_index_type<exchange_rate_index>().indices().get<by_id>();
+
+    map< std::string, std::map< account_id_type, string >> result;
+
+    // by currency
+    for (auto const& current_exch_it : (*exch_object.begin()).current_exchange_rate)
+    {
+        // by accounts
+        for(auto const& account_id_it : current_exch_it.second)
+        {
+            result[current_exch_it.first][account_id_it.first] = std::to_string(account_id_it.second);
+        }
+    }
+
+    return result;
+}
+
+graphene::chain::chain_parameters::ext::credit_options database_api_impl::list_global_extensions()const
+{
+    return get_global_properties().parameters.get_credit_options();
+}
+
 vector<asset_object> database_api_impl::list_assets(const string& lower_bound_symbol, uint32_t limit)const
 {
    FC_ASSERT( limit <= 100 );
@@ -1316,7 +1374,7 @@ market_ticker database_api_impl::get_ticker( const string& base, const string& q
     FC_ASSERT( assets[1], "Invalid quote asset symbol: ${s}", ("s",quote) );
 
     const fc::time_point_sec now = fc::time_point::now();
-    const fc::time_point_sec yesterday = fc::time_point_sec( now.sec_since_epoch() - 86400 );
+    //const fc::time_point_sec yesterday = fc::time_point_sec( now.sec_since_epoch() - 86400 );
 
     market_ticker result;
     result.time = now;

libraries/app/impacted.cpp

@@ -67,6 +67,11 @@ struct get_impacted_account_visitor
       _impacted.insert( op.borrower );
    }  
 
+   void operator()( const exchange_rate_set_operation& op ) 
+   {
+      _impacted.insert( op.witness );
+   }
+
    void operator()( const asset_claim_fees_operation& op ){}
    void operator()( const limit_order_create_operation& op ) {}
    void operator()( const limit_order_cancel_operation& op )

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

@@ -41,6 +41,7 @@
 #include <graphene/chain/worker_object.hpp>
 #include <graphene/chain/witness_object.hpp>
 #include <graphene/chain/credit_object.hpp>
+#include <graphene/chain/exchange_rate_object.hpp>
 
 #include <graphene/market_history/market_history_plugin.hpp>
 
@@ -147,6 +148,11 @@ class database_api
                                                                       uint32_t status
                                                                     ) const;
 
+      map<string, string> list_last_exchange_rates()const;
+      map< std::string, std::map< account_id_type, string >> list_current_exchange_rates()const;
+
+      graphene::chain::chain_parameters::ext::credit_options list_global_extensions()const;
+
       /**
        * @brief Get the objects corresponding to the provided IDs
        * @param ids IDs of the objects to retrieve
@@ -700,6 +706,11 @@ FC_API(graphene::app::database_api,
    (fetch_credit_requests_stack)
    (list_credit_request_by_uuid)
 
+    // Exchange rate request
+   (list_last_exchange_rates)
+   (list_current_exchange_rates)
+   (list_global_extensions)
+
    // Assets
    (get_assets)
    (list_assets)

libraries/chain/CMakeLists.txt

@@ -58,6 +58,7 @@ add_library( graphene_chain
              protocol/confidential.cpp
              protocol/vote.cpp
              protocol/credit.cpp
+             protocol/exchange_rate.cpp
 
              genesis_state.cpp
              get_config.cpp
@@ -81,13 +82,15 @@ add_library( graphene_chain
              special_authority.cpp
              buyback.cpp
 	           credit_evaluator.cpp
+             exchange_rate_evaluator.cpp
 
              account_object.cpp
              asset_object.cpp
              fba_object.cpp
              proposal_object.cpp
              vesting_balance_object.cpp
 	           credit_object.cpp
+             exchange_rate_object.cpp
 
              block_database.cpp
 

libraries/chain/account_evaluator.cpp

@@ -302,44 +302,45 @@ void_result account_update_evaluator::do_apply( const account_update_operation&
    database& d = db();
    bool sa_before, sa_after;
    d.modify( *acnt, [&](account_object& a){
-       if( o.login )
-                   a.pi.login = *(o.login);
-             if( o.email )
-                   a.pi.email = *(o.email);
-             if( o.firstName )
-                   a.pi.firstName = *(o.firstName);
-             if( o.lastName )
-                   a.pi.lastName = *(o.lastName);
-             if( o.facebook )
-                   a.pi.facebook = *(o.facebook);
-             if( o.mobile )
-                   a.pi.mobile = *(o.mobile);
-             if( o.taxResidence )
-                   a.pi.taxResidence = *(o.taxResidence);
-
-             if( o.bankName )
-                   a.ba.bankName = *(o.bankName);
-             if( o.bankSwift )
-                   a.ba.bankSwift = *(o.bankSwift);
-             if( o.bankAccount )
-                   a.ba.bankAccount = *(o.bankAccount);
-             if( o.bankBenificiary )
-                   a.ba.bankBenificiary = *(o.bankBenificiary);
-
-             if( o.about )
-                   a.ai.about = *(o.about);
-             if( o.companyName )
-                   a.ai.companyName = *(o.companyName);
-             if( o.companyActivity )
-                   a.ai.companyActivity = *(o.companyActivity);
-             if( o.companyVat )
-                   a.ai.companyVat = *(o.companyVat);
-             if( o.companyWebsite )
-                   a.ai.companyWebsite = *(o.companyWebsite);
-             if( o.companyYoutube )
-                   a.ai.companyYoutube = *(o.companyYoutube);
-             if( o.companyPdf )
-                   a.ai.companyPdf = *(o.companyPdf);
+
+      if( o.login )
+            a.pi.login = *(o.login);
+      if( o.email )
+            a.pi.email = *(o.email);
+      if( o.firstName )
+            a.pi.firstName = *(o.firstName);
+      if( o.lastName )
+            a.pi.lastName = *(o.lastName);
+      if( o.facebook )
+            a.pi.facebook = *(o.facebook);
+      if( o.mobile )
+            a.pi.mobile = *(o.mobile);
+      if( o.taxResidence )
+            a.pi.taxResidence = *(o.taxResidence);
+
+      if( o.bankName )
+            a.ba.bankName = *(o.bankName);
+      if( o.bankSwift )
+            a.ba.bankSwift = *(o.bankSwift);
+      if( o.bankAccount )
+            a.ba.bankAccount = *(o.bankAccount);
+      if( o.bankBenificiary )
+            a.ba.bankBenificiary = *(o.bankBenificiary);
+
+      if( o.about )
+            a.ai.about = *(o.about);
+      if( o.companyName )
+            a.ai.companyName = *(o.companyName);
+      if( o.companyActivity )
+            a.ai.companyActivity = *(o.companyActivity);
+      if( o.companyVat )
+            a.ai.companyVat = *(o.companyVat);
+      if( o.companyWebsite )
+            a.ai.companyWebsite = *(o.companyWebsite);
+      if( o.companyYoutube )
+            a.ai.companyYoutube = *(o.companyYoutube);
+      if( o.companyPdf )
+            a.ai.companyPdf = *(o.companyPdf);
 
       if( o.owner )
       {