From c49fbd87e77bc36c972b51266a1848d73bfe806f Mon Sep 17 00:00:00 2001
From: Daniel Larimer <dan@bitshares.org>
Date: Thu, 9 Jul 2015 14:09:21 -0400
Subject: [PATCH] adding checkpoints #121 to database

---
 libraries/chain/db_block.cpp                  | 22 +++++++++++++++++++
 .../chain/include/graphene/chain/database.hpp |  5 +++++
 .../graphene/chain/protocol/fee_schedule.hpp  |  2 +-
 3 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/libraries/chain/db_block.cpp b/libraries/chain/db_block.cpp
index 574c7d6f..36760a03 100644
--- a/libraries/chain/db_block.cpp
+++ b/libraries/chain/db_block.cpp
@@ -82,6 +82,7 @@ const signed_transaction& database::get_recent_transaction(const transaction_id_
  */
 bool database::push_block(const signed_block& new_block, uint32_t skip)
 {
+
    bool result;
    with_skip_flags( skip, [&]()
    {
@@ -365,6 +366,21 @@ const vector<operation_history_object>& database::get_applied_operations() const
 
 void database::apply_block( const signed_block& next_block, uint32_t skip )
 {
+   auto block_num = next_block.block_num();
+   if( _checkpoints.size() )
+   {
+      auto itr = _checkpoints.find( block_num );
+      if( itr != _checkpoints.end() )
+         FC_ASSERT( next_block.id() == itr->second, "Block did not match checkpoint", ("checkpoint",*itr)("block_id",next_block.id()) );
+
+      auto last = _checkpoints.rbegin();
+      if( last->first >= block_num )
+      {
+         // WE CAN SKIP ALMOST EVERYTHING
+         skip = ~0;
+      }
+   }
+
    with_skip_flags( skip, [&]()
    {
       _apply_block( next_block );
@@ -649,4 +665,10 @@ void database::create_block_summary(const signed_block& next_block)
    FC_ASSERT( sum.id.instance() == next_block.block_num(), "", ("summary.id",sum.id)("next.block_num",next_block.block_num()) );
 }
 
+void database::add_checkpoints( const flat_map<uint32_t,block_id_type>& checkpts )
+{
+   for( const auto& i : checkpts )
+      _checkpoints[i.first] = i.second;
+}
+
 } }
diff --git a/libraries/chain/include/graphene/chain/database.hpp b/libraries/chain/include/graphene/chain/database.hpp
index 1483bc89..491761d7 100644
--- a/libraries/chain/include/graphene/chain/database.hpp
+++ b/libraries/chain/include/graphene/chain/database.hpp
@@ -136,6 +136,9 @@ namespace graphene { namespace chain {
          optional<signed_block>     fetch_block_by_number( uint32_t num )const;
          const signed_transaction&  get_recent_transaction( const transaction_id_type& trx_id )const;
 
+         void                              add_checkpoints( const flat_map<uint32_t,block_id_type>& checkpts );
+         const flat_map<uint32_t,block_id_type> get_checkpoints()const { return _checkpoints; }
+
          bool push_block( const signed_block& b, uint32_t skip = skip_nothing );
          processed_transaction push_transaction( const signed_transaction& trx, uint32_t skip = skip_nothing );
          bool _push_block( const signed_block& b );
@@ -470,6 +473,8 @@ namespace graphene { namespace chain {
          vector<uint64_t>                  _committee_count_histogram_buffer;
          uint64_t                          _total_voting_stake;
 
+         flat_map<uint32_t,block_id_type>  _checkpoints;
+
          node_property_object              _node_property_object;
    };
 
diff --git a/libraries/chain/include/graphene/chain/protocol/fee_schedule.hpp b/libraries/chain/include/graphene/chain/protocol/fee_schedule.hpp
index 67570998..5cbb5abd 100644
--- a/libraries/chain/include/graphene/chain/protocol/fee_schedule.hpp
+++ b/libraries/chain/include/graphene/chain/protocol/fee_schedule.hpp
@@ -54,5 +54,5 @@ namespace graphene { namespace chain {
 } } // graphene::chain 
 
 FC_REFLECT_TYPENAME( graphene::chain::fee_parameters )
-FC_REFLECT( graphene::chain::fee_schedule, (parameters) )
+FC_REFLECT( graphene::chain::fee_schedule, (parameters)(scale) )