From d45b85e170a004be6067fa20afa6aa7eb09ff32e Mon Sep 17 00:00:00 2001
From: moneromooo-monero <moneromooo-monero@users.noreply.github.com>
Date: Sun, 16 Dec 2018 10:40:09 +0000
Subject: [PATCH] wallet2: skip derivation precalc for blocks we know we'll
 skip

---
 src/wallet/wallet2.cpp | 22 +++++++++++++++++++++-
 src/wallet/wallet2.h   |  3 +++
 2 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/src/wallet/wallet2.cpp b/src/wallet/wallet2.cpp
index 53388d659..c518371cd 100644
--- a/src/wallet/wallet2.cpp
+++ b/src/wallet/wallet2.cpp
@@ -2165,6 +2165,12 @@ void wallet2::process_outgoing(const crypto::hash &txid, const cryptonote::trans
   add_rings(tx);
 }
 //----------------------------------------------------------------------------------------------------
+bool wallet2::should_skip_block(const cryptonote::block &b, uint64_t height) const
+{
+  // seeking only for blocks that are not older then the wallet creation time plus 1 day. 1 day is for possible user incorrect time setup
+  return !(b.timestamp + 60*60*24 > m_account.get_createtime() && height >= m_refresh_from_block_height);
+}
+//----------------------------------------------------------------------------------------------------
 void wallet2::process_new_blockchain_entry(const cryptonote::block& b, const cryptonote::block_complete_entry& bche, const parsed_block &parsed_block, const crypto::hash& bl_id, uint64_t height, const std::vector<tx_cache_data> &tx_cache_data, size_t tx_cache_data_offset, std::map<std::pair<uint64_t, uint64_t>, size_t> *output_tracker_cache)
 {
   THROW_WALLET_EXCEPTION_IF(bche.txs.size() + 1 != parsed_block.o_indices.indices.size(), error::wallet_internal_error,
@@ -2174,7 +2180,7 @@ void wallet2::process_new_blockchain_entry(const cryptonote::block& b, const cry
   //handle transactions from new block
     
   //optimization: seeking only for blocks that are not older then the wallet creation time plus 1 day. 1 day is for possible user incorrect time setup
-  if(b.timestamp + 60*60*24 > m_account.get_createtime() && height >= m_refresh_from_block_height)
+  if (!should_skip_block(b, height))
   {
     TIME_MEASURE_START(miner_tx_handle_time);
     if (m_refresh_type != RefreshNoCoinbase)
@@ -2306,6 +2312,11 @@ void wallet2::process_parsed_blocks(uint64_t start_height, const std::vector<cry
   {
     THROW_WALLET_EXCEPTION_IF(parsed_blocks[i].txes.size() != parsed_blocks[i].block.tx_hashes.size(),
         error::wallet_internal_error, "Mismatched parsed_blocks[i].txes.size() and parsed_blocks[i].block.tx_hashes.size()");
+    if (should_skip_block(parsed_blocks[i].block, start_height + i))
+    {
+      txidx += 1 + parsed_blocks[i].block.tx_hashes.size();
+      continue;
+    }
     if (m_refresh_type != RefreshNoCoinbase)
       tpool.submit(&waiter, [&, i, txidx](){ cache_tx_data(parsed_blocks[i].block.miner_tx, get_transaction_hash(parsed_blocks[i].block.miner_tx), tx_cache_data[txidx]); });
     ++txidx;
@@ -2334,6 +2345,8 @@ void wallet2::process_parsed_blocks(uint64_t start_height, const std::vector<cry
 
   for (size_t i = 0; i < tx_cache_data.size(); ++i)
   {
+    if (tx_cache_data[i].empty())
+      continue;
     tpool.submit(&waiter, [&hwdev, &gender, &tx_cache_data, i]() {
       auto &slot = tx_cache_data[i];
       boost::unique_lock<hw::device> hwdev_lock(hwdev);
@@ -2352,6 +2365,7 @@ void wallet2::process_parsed_blocks(uint64_t start_height, const std::vector<cry
       if (o.target.type() == typeid(cryptonote::txout_to_key))
       {
         std::vector<crypto::key_derivation> additional_derivations;
+        additional_derivations.reserve(tx_cache_data[txidx].additional.size());
         for (const auto &iod: tx_cache_data[txidx].additional)
           additional_derivations.push_back(iod.derivation);
         const auto &key = boost::get<txout_to_key>(o.target).key;
@@ -2369,6 +2383,12 @@ void wallet2::process_parsed_blocks(uint64_t start_height, const std::vector<cry
   txidx = 0;
   for (size_t i = 0; i < blocks.size(); ++i)
   {
+    if (should_skip_block(parsed_blocks[i].block, start_height + i))
+    {
+      txidx += 1 + parsed_blocks[i].block.tx_hashes.size();
+      continue;
+    }
+
     if (m_refresh_type != RefreshType::RefreshNoCoinbase)
     {
       THROW_WALLET_EXCEPTION_IF(txidx >= tx_cache_data.size(), error::wallet_internal_error, "txidx out of range");
diff --git a/src/wallet/wallet2.h b/src/wallet/wallet2.h
index b879362e2..0488ba6f8 100644
--- a/src/wallet/wallet2.h
+++ b/src/wallet/wallet2.h
@@ -530,6 +530,8 @@ namespace tools
       std::vector<cryptonote::tx_extra_field> tx_extra_fields;
       std::vector<is_out_data> primary;
       std::vector<is_out_data> additional;
+
+      bool empty() const { return tx_extra_fields.empty() && primary.empty() && additional.empty(); }
     };
 
     /*!
@@ -1277,6 +1279,7 @@ namespace tools
      */
     bool load_keys(const std::string& keys_file_name, const epee::wipeable_string& password);
     void process_new_transaction(const crypto::hash &txid, const cryptonote::transaction& tx, const std::vector<uint64_t> &o_indices, uint64_t height, uint64_t ts, bool miner_tx, bool pool, bool double_spend_seen, const tx_cache_data &tx_cache_data, std::map<std::pair<uint64_t, uint64_t>, size_t> *output_tracker_cache = NULL);
+    bool should_skip_block(const cryptonote::block &b, uint64_t height) const;
     void process_new_blockchain_entry(const cryptonote::block& b, const cryptonote::block_complete_entry& bche, const parsed_block &parsed_block, const crypto::hash& bl_id, uint64_t height, const std::vector<tx_cache_data> &tx_cache_data, size_t tx_cache_data_offset, std::map<std::pair<uint64_t, uint64_t>, size_t> *output_tracker_cache = NULL);
     void detach_blockchain(uint64_t height);
     void get_short_chain_history(std::list<crypto::hash>& ids, uint64_t granularity = 1) const;