rpc: limit the number of txes for get_blocks.bin

2 files changed, 9 insertions, 4 deletions

diff --git a/src/blockchain_db/lmdb/db_lmdb.cpp b/src/blockchain_db/lmdb/db_lmdb.cpp
index 8aa958825..4865ec952 100644
--- a/src/blockchain_db/lmdb/db_lmdb.cpp
+++ b/src/blockchain_db/lmdb/db_lmdb.cpp
@@ -3171,7 +3171,7 @@ bool BlockchainLMDB::get_pruned_tx_blobs_from(const crypto::hash& h, size_t coun
   return true;
 }
 
-bool BlockchainLMDB::get_blocks_from(uint64_t start_height, size_t min_count, size_t max_count, size_t max_size, std::vector<std::pair<std::pair<cryptonote::blobdata, crypto::hash>, std::vector<std::pair<crypto::hash, cryptonote::blobdata>>>>& blocks, bool pruned, bool skip_coinbase, bool get_miner_tx_hash) const
+bool BlockchainLMDB::get_blocks_from(uint64_t start_height, size_t min_block_count, size_t max_block_count, size_t max_tx_count, size_t max_size, std::vector<std::pair<std::pair<cryptonote::blobdata, crypto::hash>, std::vector<std::pair<crypto::hash, cryptonote::blobdata>>>>& blocks, bool pruned, bool skip_coinbase, bool get_miner_tx_hash) const
 {
   LOG_PRINT_L3("BlockchainLMDB::" << __func__);
   check_open();
@@ -3185,14 +3185,15 @@ bool BlockchainLMDB::get_blocks_from(uint64_t start_height, size_t min_count, si
     RCURSOR(txs_prunable);
   }
 
-  blocks.reserve(std::min<size_t>(max_count, 10000)); // guard against very large max count if only checking bytes
+  blocks.reserve(std::min<size_t>(max_block_count, 10000)); // guard against very large max count if only checking bytes
   const uint64_t blockchain_height = height();
   uint64_t size = 0;
+  size_t num_txes = 0;
   MDB_val_copy<uint64_t> key(start_height);
   MDB_val k, v, val_tx_id;
   uint64_t tx_id = ~0;
   MDB_cursor_op op = MDB_SET;
-  for (uint64_t h = start_height; h < blockchain_height && blocks.size() < max_count && (size < max_size || blocks.size() < min_count); ++h)
+  for (uint64_t h = start_height; h < blockchain_height && blocks.size() < max_block_count && (size < max_size || blocks.size() < min_block_count); ++h)
   {
     MDB_cursor_op op = h == start_height ? MDB_SET : MDB_NEXT;
     int result = mdb_cursor_get(m_cur_blocks, &key, &v, op);
@@ -3243,6 +3244,7 @@ bool BlockchainLMDB::get_blocks_from(uint64_t start_height, size_t min_count, si
     op = MDB_NEXT;
 
     current_block.second.reserve(b.tx_hashes.size());
+    num_txes += b.tx_hashes.size() + (skip_coinbase ? 0 : 1);
     for (const auto &tx_hash: b.tx_hashes)
     {
       // get pruned data
@@ -3262,6 +3264,9 @@ bool BlockchainLMDB::get_blocks_from(uint64_t start_height, size_t min_count, si
       current_block.second.push_back(std::make_pair(tx_hash, std::move(tx_blob)));
       size += current_block.second.back().second.size();
     }
+
+    if (blocks.size() >= min_block_count && num_txes >= max_tx_count)
+      break;
   }
 
   TXN_POSTFIX_RDONLY();
diff --git a/src/blockchain_db/lmdb/db_lmdb.h b/src/blockchain_db/lmdb/db_lmdb.h
index 568882ae5..0e6d70039 100644
--- a/src/blockchain_db/lmdb/db_lmdb.h
+++ b/src/blockchain_db/lmdb/db_lmdb.h
@@ -257,7 +257,7 @@ public:
   virtual bool get_tx_blob(const crypto::hash& h, cryptonote::blobdata &tx) const;
   virtual bool get_pruned_tx_blob(const crypto::hash& h, cryptonote::blobdata &tx) const;
   virtual bool get_pruned_tx_blobs_from(const crypto::hash& h, size_t count, std::vector<cryptonote::blobdata> &bd) const;
-  virtual bool get_blocks_from(uint64_t start_height, size_t min_count, size_t max_count, size_t max_size, std::vector<std::pair<std::pair<cryptonote::blobdata, crypto::hash>, std::vector<std::pair<crypto::hash, cryptonote::blobdata>>>>& blocks, bool pruned, bool skip_coinbase, bool get_miner_tx_hash) const;
+  virtual bool get_blocks_from(uint64_t start_height, size_t min_block_count, size_t max_block_count, size_t max_tx_count, size_t max_size, std::vector<std::pair<std::pair<cryptonote::blobdata, crypto::hash>, std::vector<std::pair<crypto::hash, cryptonote::blobdata>>>>& blocks, bool pruned, bool skip_coinbase, bool get_miner_tx_hash) const;
   virtual bool get_prunable_tx_blob(const crypto::hash& h, cryptonote::blobdata &tx) const;
   virtual bool get_prunable_tx_hash(const crypto::hash& tx_hash, crypto::hash &prunable_hash) const;