db: store cumulative rct output distribution in the db for speed

This gets rid of the temporary precalc cache.

Also make the RPC able to send data back in binary or JSON,
since there can be a lot of data

This bumps the LMDB database format to v3, with migration.

1 files changed, 10 insertions, 1 deletions

diff --git a/src/blockchain_db/blockchain_db.cpp b/src/blockchain_db/blockchain_db.cpp
index 88ac34255..8544cc3f0 100644
--- a/src/blockchain_db/blockchain_db.cpp
+++ b/src/blockchain_db/blockchain_db.cpp
@@ -218,13 +218,22 @@ uint64_t BlockchainDB::add_block( const block& blk
   // call out to add the transactions
 
   time1 = epee::misc_utils::get_tick_count();
+
+  uint64_t num_rct_outs = 0;
   add_transaction(blk_hash, blk.miner_tx);
+  if (blk.miner_tx.version == 2)
+    num_rct_outs += blk.miner_tx.vout.size();
   int tx_i = 0;
   crypto::hash tx_hash = crypto::null_hash;
   for (const transaction& tx : txs)
   {
     tx_hash = blk.tx_hashes[tx_i];
     add_transaction(blk_hash, tx, &tx_hash);
+    for (const auto &vout: tx.vout)
+    {
+      if (vout.amount == 0)
+        ++num_rct_outs;
+    }
     ++tx_i;
   }
   TIME_MEASURE_FINISH(time1);
@@ -232,7 +241,7 @@ uint64_t BlockchainDB::add_block( const block& blk
 
   // call out to subclass implementation to add the block & metadata
   time1 = epee::misc_utils::get_tick_count();
-  add_block(blk, block_size, cumulative_difficulty, coins_generated, blk_hash);
+  add_block(blk, block_size, cumulative_difficulty, coins_generated, num_rct_outs, blk_hash);
   TIME_MEASURE_FINISH(time1);
   time_add_block1 += time1;