Apply deterministic virtual_op numbering rule

bitshares/bitshares-core#1675

Author: abitmore

libraries/chain/db_block.cpp

@@ -552,6 +552,12 @@ void database::_apply_block( const signed_block& next_block )
    const auto& dynamic_global_props = get_dynamic_global_properties();
    bool maint_needed = (dynamic_global_props.next_maintenance_time <= next_block.timestamp);
 
+   // trx_in_block starts from 0.
+   // For real operations which are explicitly included in a transaction, op_in_trx starts from 0, virtual_op is 0.
+   // For virtual operations that are derived directly from a real operation,
+   //     use the real operation's (block_num,trx_in_block,op_in_trx), virtual_op starts from 1.
+   // For virtual operations created after processed all transactions,
+   //     trx_in_block = the_block.trsanctions.size(), op_in_trx is 0, virtual_op starts from 0.
    _current_block_num    = next_block_num;
    _current_trx_in_block = 0;
 
@@ -569,6 +575,9 @@ void database::_apply_block( const signed_block& next_block )
       ++_current_trx_in_block;
    }
 
+   _current_op_in_trx    = 0;
+   _current_virtual_op   = 0;
+
    const uint32_t missed = update_witness_missed_blocks( next_block );
    update_global_dynamic_data( next_block, missed );
    update_signing_witness(signing_witness, next_block);
@@ -671,6 +680,7 @@ processed_transaction database::_apply_transaction(const signed_transaction& trx
    _current_op_in_trx = 0;
    for( const auto& op : ptrx.operations )
    {
+      _current_virtual_op = 0;
       eval_state.operation_results.emplace_back(apply_operation(eval_state, op));
       ++_current_op_in_trx;
    }

libraries/chain/include/graphene/chain/config.hpp

@@ -121,7 +121,7 @@
 #define GRAPHENE_RECENTLY_MISSED_COUNT_INCREMENT             4
 #define GRAPHENE_RECENTLY_MISSED_COUNT_DECREMENT             3
 
-#define GRAPHENE_CURRENT_DB_VERSION                          "20190219"
+#define GRAPHENE_CURRENT_DB_VERSION                          "20190324"
 
 #define GRAPHENE_IRREVERSIBLE_THRESHOLD                      (70 * GRAPHENE_1_PERCENT)
 

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

@@ -534,7 +534,7 @@ namespace graphene { namespace chain {
          uint32_t                          _current_block_num    = 0;
          uint16_t                          _current_trx_in_block = 0;
          uint16_t                          _current_op_in_trx    = 0;
-         uint16_t                          _current_virtual_op   = 0;
+         uint32_t                          _current_virtual_op   = 0;
 
          vector<uint64_t>                  _vote_tally_buffer;
          vector<uint64_t>                  _witness_count_histogram_buffer;

libraries/chain/include/graphene/chain/operation_history_object.hpp

@@ -61,7 +61,7 @@ namespace graphene { namespace chain {
          /** the operation within the transaction */
          uint16_t          op_in_trx = 0;
          /** any virtual operations implied by operation in block */
-         uint16_t          virtual_op = 0;
+         uint32_t          virtual_op = 0;
    };
 
    /**