3 files changed, 6 insertions, 1 deletions
diff --git a/src/blockchain_db/berkeleydb/db_bdb.cpp b/src/blockchain_db/berkeleydb/db_bdb.cpp
index da68ff40c..486b63a3e 100644
--- a/src/blockchain_db/berkeleydb/db_bdb.cpp
+++ b/src/blockchain_db/berkeleydb/db_bdb.cpp
@@ -588,7 +588,7 @@ bool BlockchainBDB::for_all_blocks(std::function<bool(uint64_t, const crypto::ha
 
     bdb_cur cur(DB_DEFAULT_TX, m_blocks);
 
-    Dbt_copy<uint64_t> k;
+    Dbt_copy<uint32_t> k;
     Dbt_safe v;
     bool ret = true;
     int result;
diff --git a/src/blockchain_db/berkeleydb/db_bdb.h b/src/blockchain_db/berkeleydb/db_bdb.h
index 6bc9cb4f1..d05abea25 100644
--- a/src/blockchain_db/berkeleydb/db_bdb.h
+++ b/src/blockchain_db/berkeleydb/db_bdb.h
@@ -297,6 +297,8 @@ public:
 
   virtual uint64_t get_num_outputs(const uint64_t& amount) const;
 
+  virtual uint64_t get_indexing_base() const { return 1; }
+
   virtual output_data_t get_output_key(const uint64_t& amount, const uint64_t& index);
   virtual output_data_t get_output_key(const uint64_t& global_index) const;
   virtual void get_output_key(const uint64_t &amount, const std::vector<uint64_t> &offsets, std::vector<output_data_t> &outputs);
diff --git a/src/blockchain_db/blockchain_db.h b/src/blockchain_db/blockchain_db.h
index 85144f04c..152f29b38 100644
--- a/src/blockchain_db/blockchain_db.h
+++ b/src/blockchain_db/blockchain_db.h
@@ -464,6 +464,9 @@ public:
   // returns the total number of outputs of amount <amount>
   virtual uint64_t get_num_outputs(const uint64_t& amount) const = 0;
 
+  // return index of the first element (should be hidden, but isn't)
+  virtual uint64_t get_indexing_base() const { return 0; }
+
   // return public key for output with global output amount <amount> and index <index>
   virtual output_data_t get_output_key(const uint64_t& amount, const uint64_t& index) = 0;
   virtual output_data_t get_output_key(const uint64_t& global_index) const = 0;