From 7c3904bfae62f227fdaea2614cca9ed3ae9a8a9b Mon Sep 17 00:00:00 2001
From: root <oxarbitrage@gmail.com>
Date: Wed, 31 May 2017 20:45:25 +0000
Subject: [PATCH] adding get_operation_history_id

---
 libraries/app/database_api.cpp                | 19 +++++++++++++++++++
 .../app/include/graphene/app/database_api.hpp |  7 +++++++
 2 files changed, 26 insertions(+)

diff --git a/libraries/app/database_api.cpp b/libraries/app/database_api.cpp
index 32217826..7f280323 100644
--- a/libraries/app/database_api.cpp
+++ b/libraries/app/database_api.cpp
@@ -68,6 +68,7 @@ class database_api_impl : public std::enable_shared_from_this<database_api_impl>
       map<uint32_t, optional<block_header>> get_block_header_batch(const vector<uint32_t> block_nums)const;
       optional<signed_block> get_block(uint32_t block_num)const;
       processed_transaction get_transaction( uint32_t block_num, uint32_t trx_in_block )const;
+      operation_history_id_type get_operation_history_id(uint32_t block_num, uint32_t trx_in_block, uint32_t op_in_trx)const;
 
       // Globals
       chain_property_object get_chain_properties()const;
@@ -410,6 +411,24 @@ processed_transaction database_api_impl::get_transaction(uint32_t block_num, uin
    return opt_block->transactions[trx_num];
 }
 
+operation_history_id_type database_api::get_operation_history_id(uint32_t block_num, uint32_t trx_in_block, uint32_t op_in_trx)const
+{
+   return my->get_operation_history_id( block_num, trx_in_block, op_in_trx );
+}
+
+operation_history_id_type database_api_impl::get_operation_history_id(uint32_t block_num, uint32_t trx_in_block, uint32_t op_in_trx)const
+{
+   const simple_index<operation_history_object>& op_index = _db.get_index_type<simple_index<operation_history_object>>();
+
+   for( const operation_history_object& op : op_index )
+   {
+      if(op.block_num == block_num and op.trx_in_block == trx_in_block and op.op_in_trx == op_in_trx) {
+         return op.id;
+      }
+   }
+}
+
+
 //////////////////////////////////////////////////////////////////////
 //                                                                  //
 // Globals                                                          //
diff --git a/libraries/app/include/graphene/app/database_api.hpp b/libraries/app/include/graphene/app/database_api.hpp
index 1fe64a09..94296b86 100644
--- a/libraries/app/include/graphene/app/database_api.hpp
+++ b/libraries/app/include/graphene/app/database_api.hpp
@@ -185,6 +185,12 @@ class database_api
        */
       optional<signed_transaction> get_recent_transaction_by_id( const transaction_id_type& id )const;
 
+      /**
+      * Given a block, transaction in block position and operation position in transaction, get the operation_history_id
+      */
+      operation_history_id_type get_operation_history_id(uint32_t block_num, uint32_t trx_in_block, uint32_t op_in_trx)const;
+
+
       /////////////
       // Globals //
       /////////////
@@ -600,6 +606,7 @@ FC_API(graphene::app::database_api,
    (get_block)
    (get_transaction)
    (get_recent_transaction_by_id)
+   (get_operation_history_id)
 
    // Globals
    (get_chain_properties)