wallet2: avoid re-parsing blocks when refreshing in a loop

src/wallet/wallet2.cpp

@@ -1772,7 +1772,7 @@ void wallet2::refresh(uint64_t start_height, uint64_t & blocks_fetched)
   refresh(start_height, blocks_fetched, received_money);
 }
 //----------------------------------------------------------------------------------------------------
-void wallet2::pull_and_parse_next_blocks(uint64_t start_height, uint64_t &blocks_start_height, std::list<crypto::hash> &short_chain_history, const std::vector<cryptonote::block_complete_entry> &prev_blocks, std::vector<cryptonote::block_complete_entry> &blocks, std::vector<parsed_block> &parsed_blocks, bool &error)
+void wallet2::pull_and_parse_next_blocks(uint64_t start_height, uint64_t &blocks_start_height, std::list<crypto::hash> &short_chain_history, const std::vector<cryptonote::block_complete_entry> &prev_blocks, const std::vector<parsed_block> &prev_parsed_blocks, std::vector<cryptonote::block_complete_entry> &blocks, std::vector<parsed_block> &parsed_blocks, bool &error)
 {
   error = false;
 
@@ -1781,13 +1781,10 @@ void wallet2::pull_and_parse_next_blocks(uint64_t start_height, uint64_t &blocks
     drop_from_short_history(short_chain_history, 3);
 
     // prepend the last 3 blocks, should be enough to guard against a block or two's reorg
-    cryptonote::block bl;
-    std::vector<cryptonote::block_complete_entry>::const_reverse_iterator i = prev_blocks.rbegin();
+    std::vector<parsed_block>::const_reverse_iterator i = prev_parsed_blocks.rbegin();
     for (size_t n = 0; n < std::min((size_t)3, prev_blocks.size()); ++n)
     {
-      bool ok = cryptonote::parse_and_validate_block_from_blob(i->block, bl);
-      THROW_WALLET_EXCEPTION_IF(!ok, error::block_parse_error, i->block);
-      short_chain_history.push_front(cryptonote::get_block_hash(bl));
+      short_chain_history.push_front(i->hash);
       ++i;
     }
 
@@ -2244,7 +2241,7 @@ void wallet2::refresh(uint64_t start_height, uint64_t & blocks_fetched, bool& re
         refreshed = false;
         break;
       }
-      tpool.submit(&waiter, [&]{pull_and_parse_next_blocks(start_height, next_blocks_start_height, short_chain_history, blocks, next_blocks, next_parsed_blocks, error);});
+      tpool.submit(&waiter, [&]{pull_and_parse_next_blocks(start_height, next_blocks_start_height, short_chain_history, blocks, parsed_blocks, next_blocks, next_parsed_blocks, error);});
 
       if (!first)
       {

src/wallet/wallet2.h

@@ -1134,7 +1134,7 @@ namespace tools
     void pull_blocks(uint64_t start_height, uint64_t& blocks_start_height, const std::list<crypto::hash> &short_chain_history, std::vector<cryptonote::block_complete_entry> &blocks, std::vector<cryptonote::COMMAND_RPC_GET_BLOCKS_FAST::block_output_indices> &o_indices);
     void pull_hashes(uint64_t start_height, uint64_t& blocks_start_height, const std::list<crypto::hash> &short_chain_history, std::vector<crypto::hash> &hashes);
     void fast_refresh(uint64_t stop_height, uint64_t &blocks_start_height, std::list<crypto::hash> &short_chain_history);
-    void pull_and_parse_next_blocks(uint64_t start_height, uint64_t &blocks_start_height, std::list<crypto::hash> &short_chain_history, const std::vector<cryptonote::block_complete_entry> &prev_blocks, std::vector<cryptonote::block_complete_entry> &blocks, std::vector<parsed_block> &parsed_blocks, bool &error);
+    void pull_and_parse_next_blocks(uint64_t start_height, uint64_t &blocks_start_height, std::list<crypto::hash> &short_chain_history, const std::vector<cryptonote::block_complete_entry> &prev_blocks, const std::vector<parsed_block> &prev_parsed_blocks, std::vector<cryptonote::block_complete_entry> &blocks, std::vector<parsed_block> &parsed_blocks, bool &error);
     void process_parsed_blocks(uint64_t start_height, const std::vector<cryptonote::block_complete_entry> &blocks, const std::vector<parsed_block> &parsed_blocks, uint64_t& blocks_added);
     uint64_t select_transfers(uint64_t needed_money, std::vector<size_t> unused_transfers_indices, std::vector<size_t>& selected_transfers, bool trusted_daemon) const;
     bool prepare_file_names(const std::string& file_path);