Enforce restricted # pool txs served via RPC + optimize chunked reqs [release-v0.18]

- `/getblocks.bin` respects the `RESTRICTED_TX_COUNT` (=100) when
returning pool txs via a restricted RPC daemon.
- A restricted RPC daemon includes a max of `RESTRICTED_TX_COUNT` txs
in the `added_pool_txs` field, and returns any remaining pool hashes
in the `remaining_added_pool_txids` field. The client then requests
the remaining txs via `/gettransactions` in chunks.
- `/gettransactions` no longer does expensive no-ops for ALL pool txs
if the client requests a subset of pool txs. Instead it searches for
the txs the client explicitly requests.
- Reset `m_pool_info_query_time` when a user:
  (1) rescans the chain (so the wallet re-requests the whole pool)
  (2) changes the daemon their wallets points to (a new daemon would
      have a different view of the pool)
- `/getblocks.bin` respects the `req.prune` field when returning
pool txs.
- Pool extension fields in response to `/getblocks.bin` are optional
with default 0'd values.

src/cryptonote_core/blockchain.cpp

@@ -2065,7 +2065,7 @@ bool Blockchain::handle_alternative_block(const block& b, const crypto::hash& id
       cryptonote::blobdata blob;
       if (m_tx_pool.have_tx(txid, relay_category::legacy))
       {
-        if (m_tx_pool.get_transaction_info(txid, td))
+        if (m_tx_pool.get_transaction_info(txid, td, true/*include_sensitive_data*/))
         {
           bei.block_cumulative_weight += td.weight;
         }

src/cryptonote_core/cryptonote_core.cpp

@@ -1727,6 +1727,11 @@ namespace cryptonote
     return true;
   }
   //-----------------------------------------------------------------------------------------------
+  bool core::get_pool_transactions_info(const std::vector<crypto::hash>& txids, std::vector<std::pair<crypto::hash, tx_memory_pool::tx_details>>& txs, bool include_sensitive_txes) const
+  {
+    return m_mempool.get_transactions_info(txids, txs, include_sensitive_txes);
+  }
+  //-----------------------------------------------------------------------------------------------
   bool core::get_pool_transactions(std::vector<transaction>& txs, bool include_sensitive_data) const
   {
     m_mempool.get_transactions(txs, include_sensitive_data);
@@ -1739,9 +1744,9 @@ namespace cryptonote
     return true;
   }
   //-----------------------------------------------------------------------------------------------
-  bool core::get_pool_info(time_t start_time, bool include_sensitive_txes, std::vector<tx_memory_pool::tx_details>& added_txs, std::vector<crypto::hash>& removed_txs, bool& incremental) const
+  bool core::get_pool_info(time_t start_time, bool include_sensitive_txes, size_t max_tx_count, std::vector<std::pair<crypto::hash, tx_memory_pool::tx_details>>& added_txs, std::vector<crypto::hash>& remaining_added_txids, std::vector<crypto::hash>& removed_txs, bool& incremental) const
   {
-    return m_mempool.get_pool_info(start_time, include_sensitive_txes, added_txs, removed_txs, incremental);
+    return m_mempool.get_pool_info(start_time, include_sensitive_txes, max_tx_count, added_txs, remaining_added_txids, removed_txs, incremental);
   }
   //-----------------------------------------------------------------------------------------------
   bool core::get_pool_transaction_stats(struct txpool_stats& stats, bool include_sensitive_data) const

src/cryptonote_core/cryptonote_core.h

@@ -509,13 +509,22 @@ namespace cryptonote
       */
      bool get_pool_transaction_hashes(std::vector<crypto::hash>& txs, bool include_sensitive_txes = false) const;
 
+     /**
+      * @copydoc tx_memory_pool::get_pool_transactions_info
+      * @param include_sensitive_txes include private transactions
+      *
+      * @note see tx_memory_pool::get_pool_transactions_info
+      */
+     bool get_pool_transactions_info(const std::vector<crypto::hash>& txids, std::vector<std::pair<crypto::hash, tx_memory_pool::tx_details>>& txs, bool include_sensitive_txes = false) const;
+
      /**
       * @copydoc tx_memory_pool::get_pool_info
       * @param include_sensitive_txes include private transactions
+      * @param max_tx_count max allowed added_txs in response
       *
       * @note see tx_memory_pool::get_pool_info
       */
-     bool get_pool_info(time_t start_time, bool include_sensitive_txes, std::vector<tx_memory_pool::tx_details>& added_txs, std::vector<crypto::hash>& removed_txs, bool& incremental) const;
+     bool get_pool_info(time_t start_time, bool include_sensitive_txes, size_t max_tx_count, std::vector<std::pair<crypto::hash, tx_memory_pool::tx_details>>& added_txs, std::vector<crypto::hash>& remaining_added_txids, std::vector<crypto::hash>& removed_txs, bool& incremental) const;
 
     /**
       * @copydoc tx_memory_pool::get_transactions

src/cryptonote_core/tx_pool.cpp

@@ -614,7 +614,7 @@ namespace cryptonote
     return true;
   }
   //---------------------------------------------------------------------------------
-  bool tx_memory_pool::get_transaction_info(const crypto::hash &txid, tx_details &td) const
+  bool tx_memory_pool::get_transaction_info(const crypto::hash &txid, tx_details &td, bool include_sensitive_data, bool include_blob) const
   {
     PERF_TIMER(get_transaction_info);
     CRITICAL_REGION_LOCAL(m_transactions_lock);
@@ -626,7 +626,12 @@ namespace cryptonote
       txpool_tx_meta_t meta;
       if (!m_blockchain.get_txpool_tx_meta(txid, meta))
       {
-        MERROR("Failed to find tx in txpool");
+        LOG_PRINT_L2("Failed to find tx in txpool: " << txid);
+        return false;
+      }
+      if (!include_sensitive_data && !meta.matches(relay_category::broadcasted))
+      {
+        // We don't want sensitive data && the tx is sensitive, so no need to return it
         return false;
       }
       cryptonote::blobdata txblob = m_blockchain.get_txpool_tx_blob(txid, relay_category::all);
@@ -652,12 +657,13 @@ namespace cryptonote
       td.kept_by_block = meta.kept_by_block;
       td.last_failed_height = meta.last_failed_height;
       td.last_failed_id = meta.last_failed_id;
-      td.receive_time = meta.receive_time;
-      td.last_relayed_time = meta.dandelionpp_stem ? 0 : meta.last_relayed_time;
+      td.receive_time = include_sensitive_data ? meta.receive_time : 0;
+      td.last_relayed_time = (include_sensitive_data && !meta.dandelionpp_stem) ? meta.last_relayed_time : 0;
       td.relayed = meta.relayed;
       td.do_not_relay = meta.do_not_relay;
       td.double_spend_seen = meta.double_spend_seen;
-      td.sensitive = !meta.matches(relay_category::broadcasted);
+      if (include_blob)
+        td.tx_blob = std::move(txblob);
     }
     catch (const std::exception &e)
     {
@@ -667,6 +673,25 @@ namespace cryptonote
 
     return true;
   }
+  //------------------------------------------------------------------
+  bool tx_memory_pool::get_transactions_info(const std::vector<crypto::hash>& txids, std::vector<std::pair<crypto::hash, tx_details>>& txs, bool include_sensitive) const
+  {
+    CRITICAL_REGION_LOCAL(m_transactions_lock);
+    CRITICAL_REGION_LOCAL1(m_blockchain);
+
+    txs.clear();
+
+    for (const auto &it: txids)
+    {
+      tx_details details;
+      bool success = get_transaction_info(it, details, include_sensitive, true/*include_blob*/);
+      if (success)
+      {
+        txs.push_back(std::make_pair(it, std::move(details)));
+      }
+    }
+    return true;
+  }
   //---------------------------------------------------------------------------------
   bool tx_memory_pool::get_complement(const std::vector<crypto::hash> &hashes, std::vector<cryptonote::blobdata> &txes) const
   {
@@ -940,7 +965,7 @@ namespace cryptonote
     }, false, category);
   }
   //------------------------------------------------------------------
-  bool tx_memory_pool::get_pool_info(time_t start_time, bool include_sensitive, std::vector<tx_details>& added_txs, std::vector<crypto::hash>& removed_txs, bool& incremental) const
+  bool tx_memory_pool::get_pool_info(time_t start_time, bool include_sensitive, size_t max_tx_count, std::vector<std::pair<crypto::hash, tx_details>>& added_txs, std::vector<crypto::hash>& remaining_added_txids, std::vector<crypto::hash>& removed_txs, bool& incremental) const
   {
     CRITICAL_REGION_LOCAL(m_transactions_lock);
     CRITICAL_REGION_LOCAL1(m_blockchain);
@@ -968,46 +993,39 @@ namespace cryptonote
     }
 
     added_txs.clear();
+    remaining_added_txids.clear();
     removed_txs.clear();
 
+    std::vector<crypto::hash> txids;
     if (!incremental)
     {
+      LOG_PRINT_L2("Giving back the whole pool");
       // Give back the whole pool in 'added_txs'; because calling 'get_transaction_info' right inside the
       // anonymous method somehow results in an LMDB error with transactions we have to build a list of
       // ids first and get the full info afterwards
-      std::vector<crypto::hash> txids;
-      const relay_category category = include_sensitive ? relay_category::all : relay_category::broadcasted;
-      m_blockchain.for_all_txpool_txes([&txids](const crypto::hash &txid, const txpool_tx_meta_t &meta, const cryptonote::blobdata_ref *bd){
-        txids.push_back(txid);
-        return true;
-      }, false, category);
-      tx_details details;
-      for (const auto &it: txids)
+      get_transaction_hashes(txids, include_sensitive);
+      if (txids.size() > max_tx_count)
       {
-        bool success = get_transaction_info(it, details);
-        if (success)
-        {
-          added_txs.push_back(std::move(details));
-        }
+        remaining_added_txids = std::vector<crypto::hash>(txids.begin() + max_tx_count, txids.end());
+        txids.erase(txids.begin() + max_tx_count, txids.end());
       }
+      get_transactions_info(txids, added_txs, include_sensitive);
       return true;
     }
 
     // Give back incrementally, based on time of entry into the map
-    tx_details details;
     for (const auto &pit : m_added_txs_by_id)
     {
       if (pit.second >= start_time)
-      {
-        bool success = get_transaction_info(pit.first, details);
-        if (success)
-        {
-          if (include_sensitive || !details.sensitive)
-          {
-            added_txs.push_back(std::move(details));
-          }
-        }
-      }
+        txids.push_back(pit.first);
+    }
+    get_transactions_info(txids, added_txs, include_sensitive);
+    if (added_txs.size() > max_tx_count)
+    {
+      remaining_added_txids.reserve(added_txs.size() - max_tx_count);
+      for (size_t i = max_tx_count; i < added_txs.size(); ++i)
+        remaining_added_txids.push_back(added_txs[i].first);
+      added_txs.erase(added_txs.begin() + max_tx_count, added_txs.end());
     }
 
     std::multimap<time_t, removed_tx_info>::const_iterator rit = m_removed_txs_by_time.lower_bound(start_time);

src/cryptonote_core/tx_pool.h

@@ -428,6 +428,7 @@ namespace cryptonote
     struct tx_details
     {
       transaction tx;  //!< the transaction
+      cryptonote::blobdata tx_blob; //!< the transaction's binary blob
       size_t blob_size;  //!< the transaction's size
       size_t weight;  //!< the transaction's weight
       uint64_t fee;  //!< the transaction's fee amount
@@ -461,13 +462,17 @@ namespace cryptonote
       bool do_not_relay; //!< to avoid relay this transaction to the network
 
       bool double_spend_seen; //!< true iff another tx was seen double spending this one
-      bool sensitive;
     };
 
     /**
      * @brief get infornation about a single transaction
      */
-    bool get_transaction_info(const crypto::hash &txid, tx_details &td) const;
+    bool get_transaction_info(const crypto::hash &txid, tx_details &td, bool include_sensitive_data, bool include_blob = false) const;
+
+    /**
+     * @brief get information about multiple transactions
+     */
+    bool get_transactions_info(const std::vector<crypto::hash>& txids, std::vector<std::pair<crypto::hash, tx_details>>& txs, bool include_sensitive_data = false) const;
 
     /**
      * @brief get transactions not in the passed set
@@ -479,7 +484,7 @@ namespace cryptonote
      *
      * @return true on success, false on error
      */
-    bool get_pool_info(time_t start_time, bool include_sensitive, std::vector<tx_details>& added_txs, std::vector<crypto::hash>& removed_txs, bool& incremental) const;
+    bool get_pool_info(time_t start_time, bool include_sensitive, size_t max_tx_count, std::vector<std::pair<crypto::hash, tx_details>>& added_txs, std::vector<crypto::hash>& remaining_added_txids, std::vector<crypto::hash>& removed_txs, bool& incremental) const;
 
   private:
 

src/rpc/core_rpc_server.cpp

@@ -630,31 +630,34 @@ namespace cryptonote
       const bool restricted = m_restricted && ctx;
       const bool request_has_rpc_origin = ctx != NULL;
       const bool allow_sensitive = !request_has_rpc_origin || !restricted;
+      const size_t max_tx_count = restricted ? RESTRICTED_TRANSACTIONS_COUNT : std::numeric_limits<size_t>::max();
 
       bool incremental;
-      std::vector<tx_memory_pool::tx_details> added_pool_txs;
-      bool success = m_core.get_pool_info((time_t)req.pool_info_since, allow_sensitive, added_pool_txs, res.removed_pool_txids, incremental);
+      std::vector<std::pair<crypto::hash, tx_memory_pool::tx_details>> added_pool_txs;
+      bool success = m_core.get_pool_info((time_t)req.pool_info_since, allow_sensitive, max_tx_count, added_pool_txs, res.remaining_added_pool_txids, res.removed_pool_txids, incremental);
       if (success)
       {
         res.added_pool_txs.clear();
         if (m_rpc_payment)
         {
-          CHECK_PAYMENT_SAME_TS(req, res, added_pool_txs.size() * COST_PER_TX + res.removed_pool_txids.size() * COST_PER_POOL_HASH);
+          CHECK_PAYMENT_SAME_TS(req, res, added_pool_txs.size() * COST_PER_TX + (res.remaining_added_pool_txids.size() + res.removed_pool_txids.size()) * COST_PER_POOL_HASH);
         }
-        for (auto tx_detail: added_pool_txs)
+        for (const auto &added_pool_tx: added_pool_txs)
         {
           COMMAND_RPC_GET_BLOCKS_FAST::pool_tx_info info;
-          info.tx_hash = cryptonote::get_transaction_hash(tx_detail.tx);
+          info.tx_hash = added_pool_tx.first;
           std::stringstream oss;
           binary_archive<true> ar(oss);
-          bool r = ::serialization::serialize(ar, tx_detail.tx);
+          bool r = req.prune
+            ? const_cast<cryptonote::transaction&>(added_pool_tx.second.tx).serialize_base(ar)
+            : ::serialization::serialize(ar, const_cast<cryptonote::transaction&>(added_pool_tx.second.tx));
           if (!r)
           {
             res.status = "Failed to serialize transaction";
             return true;
           }
           info.tx_blob = oss.str();
-          info.double_spend_seen = tx_detail.double_spend_seen;
+          info.double_spend_seen = added_pool_tx.second.double_spend_seen;
           res.added_pool_txs.push_back(std::move(info));
         }
       }
@@ -993,17 +996,16 @@ namespace cryptonote
     // try the pool for any missing txes
     size_t found_in_pool = 0;
     std::unordered_set<crypto::hash> pool_tx_hashes;
-    std::unordered_map<crypto::hash, tx_info> per_tx_pool_tx_info;
+    std::unordered_map<crypto::hash, tx_memory_pool::tx_details> per_tx_pool_tx_details;
     if (!missed_txs.empty())
     {
-      std::vector<tx_info> pool_tx_info;
-      std::vector<spent_key_image_info> pool_key_image_info;
-      bool r = m_core.get_pool_transactions_and_spent_keys_info(pool_tx_info, pool_key_image_info, !request_has_rpc_origin || !restricted);
+      std::vector<std::pair<crypto::hash, tx_memory_pool::tx_details>> pool_txs;
+      bool r = m_core.get_pool_transactions_info(missed_txs, pool_txs, !request_has_rpc_origin || !restricted);
       if(r)
       {
         // sort to match original request
         std::vector<std::tuple<crypto::hash, cryptonote::blobdata, crypto::hash, cryptonote::blobdata>> sorted_txs;
-        std::vector<tx_info>::const_iterator i;
+        std::vector<std::pair<crypto::hash, tx_memory_pool::tx_details>>::const_iterator i;
         unsigned txs_processed = 0;
         for (const crypto::hash &h: vh)
         {
@@ -1023,36 +1025,23 @@ namespace cryptonote
             sorted_txs.push_back(std::move(txs[txs_processed]));
             ++txs_processed;
           }
-          else if ((i = std::find_if(pool_tx_info.begin(), pool_tx_info.end(), [h](const tx_info &txi) { return epee::string_tools::pod_to_hex(h) == txi.id_hash; })) != pool_tx_info.end())
+          else if ((i = std::find_if(pool_txs.begin(), pool_txs.end(), [h](const std::pair<crypto::hash, tx_memory_pool::tx_details> &pt) { return h == pt.first; })) != pool_txs.end())
           {
-            cryptonote::transaction tx;
-            if (!cryptonote::parse_and_validate_tx_from_blob(i->tx_blob, tx))
-            {
-              res.status = "Failed to parse and validate tx from blob";
-              return true;
-            }
+            const tx_memory_pool::tx_details &td = i->second;
             std::stringstream ss;
             binary_archive<true> ba(ss);
-            bool r = const_cast<cryptonote::transaction&>(tx).serialize_base(ba);
+            bool r = const_cast<cryptonote::transaction&>(td.tx).serialize_base(ba);
             if (!r)
             {
               res.status = "Failed to serialize transaction base";
               return true;
             }
             const cryptonote::blobdata pruned = ss.str();
-            const crypto::hash prunable_hash = tx.version == 1 ? crypto::null_hash : get_transaction_prunable_hash(tx);
-            sorted_txs.push_back(std::make_tuple(h, pruned, prunable_hash, std::string(i->tx_blob, pruned.size())));
+            const crypto::hash prunable_hash = td.tx.version == 1 ? crypto::null_hash : get_transaction_prunable_hash(td.tx);
+            sorted_txs.push_back(std::make_tuple(h, pruned, prunable_hash, std::string(td.tx_blob, pruned.size())));
             missed_txs.erase(std::find(missed_txs.begin(), missed_txs.end(), h));
             pool_tx_hashes.insert(h);
-            const std::string hash_string = epee::string_tools::pod_to_hex(h);
-            for (const auto &ti: pool_tx_info)
-            {
-              if (ti.id_hash == hash_string)
-              {
-                per_tx_pool_tx_info.insert(std::make_pair(h, ti));
-                break;
-              }
-            }
+            per_tx_pool_tx_details.insert(std::make_pair(h, td));
             ++found_in_pool;
           }
         }
@@ -1148,8 +1137,8 @@ namespace cryptonote
       {
         e.block_height = e.block_timestamp = std::numeric_limits<uint64_t>::max();
         e.confirmations = 0;
-        auto it = per_tx_pool_tx_info.find(tx_hash);
-        if (it != per_tx_pool_tx_info.end())
+        auto it = per_tx_pool_tx_details.find(tx_hash);
+        if (it != per_tx_pool_tx_details.end())
         {
           e.double_spend_seen = it->second.double_spend_seen;
           e.relayed = it->second.relayed;

src/rpc/core_rpc_server_commands_defs.h

@@ -236,6 +236,7 @@ namespace cryptonote
       uint64_t    daemon_time;
       uint8_t     pool_info_extent;
       std::vector<pool_tx_info> added_pool_txs;
+      std::vector<crypto::hash> remaining_added_pool_txids;
       std::vector<crypto::hash> removed_pool_txids;
 
       BEGIN_KV_SERIALIZE_MAP()
@@ -244,10 +245,17 @@ namespace cryptonote
         KV_SERIALIZE(start_height)
         KV_SERIALIZE(current_height)
         KV_SERIALIZE(output_indices)
-        KV_SERIALIZE(daemon_time)
-        KV_SERIALIZE(pool_info_extent)
-        KV_SERIALIZE(added_pool_txs)
-        KV_SERIALIZE_CONTAINER_POD_AS_BLOB(removed_pool_txids)
+        KV_SERIALIZE_OPT(daemon_time, (uint64_t) 0)
+        KV_SERIALIZE_OPT(pool_info_extent, (uint8_t) 0)
+        if (pool_info_extent != POOL_INFO_EXTENT::NONE)
+        {
+          KV_SERIALIZE(added_pool_txs)
+          KV_SERIALIZE_CONTAINER_POD_AS_BLOB(remaining_added_pool_txids)
+        }
+        if (pool_info_extent == POOL_INFO_EXTENT::INCREMENTAL)
+        {
+          KV_SERIALIZE_CONTAINER_POD_AS_BLOB(removed_pool_txids)
+        }
       END_KV_SERIALIZE_MAP()
     };
     typedef epee::misc_utils::struct_init<response_t> response;

src/wallet/node_rpc_proxy.cpp

@@ -392,6 +392,36 @@ boost::optional<std::string> NodeRPCProxy::get_rpc_payment_info(bool mining, boo
   return boost::none;
 }
 
+boost::optional<std::string> NodeRPCProxy::get_transactions(const std::vector<crypto::hash> &txids, const std::function<void(const cryptonote::COMMAND_RPC_GET_TRANSACTIONS::request&, const cryptonote::COMMAND_RPC_GET_TRANSACTIONS::response&, bool)> &f)
+{
+  const size_t SLICE_SIZE = 100; // RESTRICTED_TRANSACTIONS_COUNT as defined in rpc/core_rpc_server.cpp
+  for (size_t offset = 0; offset < txids.size(); offset += SLICE_SIZE)
+  {
+    cryptonote::COMMAND_RPC_GET_TRANSACTIONS::request req_t = AUTO_VAL_INIT(req_t);
+    cryptonote::COMMAND_RPC_GET_TRANSACTIONS::response resp_t = AUTO_VAL_INIT(resp_t);
+
+    const size_t n_txids = std::min<size_t>(SLICE_SIZE, txids.size() - offset);
+    for (size_t n = offset; n < (offset + n_txids); ++n)
+      req_t.txs_hashes.push_back(epee::string_tools::pod_to_hex(txids[n]));
+    MDEBUG("asking for " << req_t.txs_hashes.size() << " transactions");
+    req_t.decode_as_json = false;
+    req_t.prune = true;
+
+    bool r = false;
+    {
+      const boost::lock_guard<boost::recursive_mutex> lock{m_daemon_rpc_mutex};
+      uint64_t pre_call_credits = m_rpc_payment_state.credits;
+      req_t.client = cryptonote::make_rpc_payment_signature(m_client_id_secret_key);
+      r = net_utils::invoke_http_json("/gettransactions", req_t, resp_t, m_http_client, rpc_timeout);
+      if (r && resp_t.status == CORE_RPC_STATUS_OK)
+        check_rpc_cost(m_rpc_payment_state, "/gettransactions", resp_t.credits, pre_call_credits, resp_t.txs.size() * COST_PER_TX);
+    }
+
+    f(req_t, resp_t, r);
+  }
+  return boost::optional<std::string>();
+}
+
 boost::optional<std::string> NodeRPCProxy::get_block_header_by_height(uint64_t height, cryptonote::block_header_response &block_header)
 {
   if (m_offline)

src/wallet/node_rpc_proxy.h

@@ -59,6 +59,7 @@ public:
   boost::optional<std::string> get_dynamic_base_fee_estimate_2021_scaling(uint64_t grace_blocks, std::vector<uint64_t> &fees);
   boost::optional<std::string> get_fee_quantization_mask(uint64_t &fee_quantization_mask);
   boost::optional<std::string> get_rpc_payment_info(bool mining, bool &payment_required, uint64_t &credits, uint64_t &diff, uint64_t &credits_per_hash_found, cryptonote::blobdata &blob, uint64_t &height, uint64_t &seed_height, crypto::hash &seed_hash, crypto::hash &next_seed_hash, uint32_t &cookie);
+  boost::optional<std::string> get_transactions(const std::vector<crypto::hash> &txids, const std::function<void(const cryptonote::COMMAND_RPC_GET_TRANSACTIONS::request&, const cryptonote::COMMAND_RPC_GET_TRANSACTIONS::response&, bool)> &f);
   boost::optional<std::string> get_block_header_by_height(uint64_t height, cryptonote::block_header_response &block_header);
 
 private:

src/wallet/wallet2.cpp

@@ -1350,6 +1350,7 @@ bool wallet2::set_daemon(std::string daemon_address, boost::optional<epee::net_u
     m_rpc_payment_state.discrepancy = 0;
     m_rpc_version = 0;
     m_node_rpc_proxy.invalidate();
+    m_pool_info_query_time = 0;
   }
 
   const std::string address = get_daemon_address();
@@ -2940,6 +2941,82 @@ void wallet2::parse_block_round(const cryptonote::blobdata &blob, cryptonote::bl
   error = !cryptonote::parse_and_validate_block_from_blob(blob, bl, bl_id);
 }
 //----------------------------------------------------------------------------------------------------
+void read_pool_txs(const cryptonote::COMMAND_RPC_GET_TRANSACTIONS::request &req, const cryptonote::COMMAND_RPC_GET_TRANSACTIONS::response &res, bool r, const std::vector<crypto::hash> &txids, std::vector<std::tuple<cryptonote::transaction, crypto::hash, bool>> &txs)
+{
+  if (r && res.status == CORE_RPC_STATUS_OK)
+  {
+    MDEBUG("Reading pool txs");
+    if (res.txs.size() == req.txs_hashes.size())
+    {
+      for (const auto &tx_entry: res.txs)
+      {
+        if (tx_entry.in_pool)
+        {
+          cryptonote::transaction tx;
+          cryptonote::blobdata bd;
+          crypto::hash tx_hash;
+
+          if (get_pruned_tx(tx_entry, tx, tx_hash))
+          {
+            const std::vector<crypto::hash>::const_iterator i = std::find_if(txids.begin(), txids.end(),
+                [tx_hash](const crypto::hash &e) { return e == tx_hash; });
+            if (i != txids.end())
+            {
+              txs.push_back(std::make_tuple(tx, tx_hash, tx_entry.double_spend_seen));
+            }
+            else
+            {
+              MERROR("Got txid " << tx_hash << " which we did not ask for");
+            }
+          }
+          else
+          {
+            LOG_PRINT_L0("Failed to parse transaction from daemon");
+          }
+        }
+        else
+        {
+          LOG_PRINT_L1("Transaction from daemon was in pool, but is no more");
+        }
+      }
+    }
+    else
+    {
+      LOG_PRINT_L0("Expected " << req.txs_hashes.size() << " out of " << txids.size() << " tx(es), got " << res.txs.size());
+    }
+  }
+}
+//----------------------------------------------------------------------------------------------------
+void wallet2::process_pool_info_extent(const cryptonote::COMMAND_RPC_GET_BLOCKS_FAST::response &res, std::vector<std::tuple<cryptonote::transaction, crypto::hash, bool>> &process_txs, bool refreshed)
+{
+  std::vector<std::tuple<cryptonote::transaction, crypto::hash, bool>> added_pool_txs;
+  added_pool_txs.reserve(res.added_pool_txs.size() + res.remaining_added_pool_txids.size());
+
+  for (const auto &pool_tx: res.added_pool_txs)
+  {
+    cryptonote::transaction tx;
+    THROW_WALLET_EXCEPTION_IF(!cryptonote::parse_and_validate_tx_base_from_blob(pool_tx.tx_blob, tx),
+        error::wallet_internal_error, "Failed to validate transaction base from daemon");
+    added_pool_txs.push_back(std::make_tuple(tx, pool_tx.tx_hash, pool_tx.double_spend_seen));
+  }
+
+  // getblocks.bin may return more added pool transactions than we're allowed to request in restricted mode
+  if (!res.remaining_added_pool_txids.empty())
+  {
+    // request the remaining txs
+    m_node_rpc_proxy.get_transactions(res.remaining_added_pool_txids,
+      [this, &res, &added_pool_txs](const cryptonote::COMMAND_RPC_GET_TRANSACTIONS::request &req_t, const cryptonote::COMMAND_RPC_GET_TRANSACTIONS::response &resp_t, bool r)
+      {
+        read_pool_txs(req_t, resp_t, r, res.remaining_added_pool_txids, added_pool_txs);
+        if (!r || resp_t.status != CORE_RPC_STATUS_OK)
+          LOG_PRINT_L0("Error calling gettransactions daemon RPC: r " << r << ", status " << get_rpc_status(resp_t.status));
+      }
+    );
+  }
+
+  update_pool_state_from_pool_data(res.pool_info_extent == COMMAND_RPC_GET_BLOCKS_FAST::INCREMENTAL, res.removed_pool_txids, added_pool_txs, process_txs, refreshed);
+}
+//----------------------------------------------------------------------------------------------------
 void wallet2::pull_blocks(bool first, bool try_incremental, 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, uint64_t &current_height)
 {
   cryptonote::COMMAND_RPC_GET_BLOCKS_FAST::request req = AUTO_VAL_INIT(req);
@@ -2965,7 +3042,7 @@ void wallet2::pull_blocks(bool first, bool try_incremental, uint64_t start_heigh
     THROW_WALLET_EXCEPTION_IF(res.blocks.size() != res.output_indices.size(), error::wallet_internal_error,
         "mismatched blocks (" + boost::lexical_cast<std::string>(res.blocks.size()) + ") and output_indices (" +
         boost::lexical_cast<std::string>(res.output_indices.size()) + ") sizes from daemon");
-    uint64_t pool_info_cost = res.added_pool_txs.size() * COST_PER_TX + res.removed_pool_txids.size() * COST_PER_POOL_HASH;
+    uint64_t pool_info_cost = res.added_pool_txs.size() * COST_PER_TX + (res.remaining_added_pool_txids.size() + res.removed_pool_txids.size()) * COST_PER_POOL_HASH;
     check_rpc_cost("/getblocks.bin", res.credits, pre_call_credits, 1 + res.blocks.size() * COST_PER_BLOCK + pool_info_cost);
   }
 
@@ -2984,7 +3061,7 @@ void wallet2::pull_blocks(bool first, bool try_incremental, uint64_t start_heigh
   {
     if (res.pool_info_extent != COMMAND_RPC_GET_BLOCKS_FAST::NONE)
     {
-      update_pool_state_from_pool_data(res, m_process_pool_txs, true);
+      process_pool_info_extent(res, m_process_pool_txs, true);
     }
     else
     {
@@ -3510,14 +3587,14 @@ void wallet2::update_pool_state(std::vector<std::tuple<cryptonote::transaction,
       req.client = get_client_signature();
       bool r = net_utils::invoke_http_bin("/getblocks.bin", req, res, *m_http_client, rpc_timeout);
       THROW_ON_RPC_RESPONSE_ERROR(r, {}, res, "getblocks.bin", error::get_blocks_error, get_rpc_status(res.status));
-      uint64_t pool_info_cost = res.added_pool_txs.size() * COST_PER_TX + res.removed_pool_txids.size() * COST_PER_POOL_HASH;
+      uint64_t pool_info_cost = res.added_pool_txs.size() * COST_PER_TX + (res.remaining_added_pool_txids.size() + res.removed_pool_txids.size()) * COST_PER_POOL_HASH;
       check_rpc_cost("/getblocks.bin", res.credits, pre_call_credits, pool_info_cost);
     }
 
     m_pool_info_query_time = res.daemon_time;
     if (res.pool_info_extent != COMMAND_RPC_GET_BLOCKS_FAST::NONE)
     {
-      update_pool_state_from_pool_data(res, process_txs, refreshed);
+      process_pool_info_extent(res, process_txs, refreshed);
       updated = true;
     }
     // We SHOULD get pool data here, but if for some crazy reason we don't fall back to the "old" method
@@ -3587,85 +3664,22 @@ void wallet2::update_pool_state_by_pool_query(std::vector<std::tuple<cryptonote:
   MTRACE("update_pool_state_by_pool_query done second loop");
 
   // gather txids of new pool txes to us
-  std::vector<std::pair<crypto::hash, bool>> txids;
+  std::vector<crypto::hash> txids;
   for (const auto &txid: res.tx_hashes)
   {
     if (accept_pool_tx_for_processing(txid))
-      txids.push_back({txid, false});
+      txids.push_back(txid);
   }
 
-  // get_transaction_pool_hashes.bin may return more transactions than we're allowed to request in restricted mode
-  const size_t SLICE_SIZE = 100; // RESTRICTED_TRANSACTIONS_COUNT as defined in rpc/core_rpc_server.cpp
-  for (size_t offset = 0; offset < txids.size(); offset += SLICE_SIZE)
-  {
-    cryptonote::COMMAND_RPC_GET_TRANSACTIONS::request req;
-    cryptonote::COMMAND_RPC_GET_TRANSACTIONS::response res;
-
-    const size_t n_txids = std::min<size_t>(SLICE_SIZE, txids.size() - offset);
-    for (size_t n = offset; n < (offset + n_txids); ++n) {
-      req.txs_hashes.push_back(epee::string_tools::pod_to_hex(txids.at(n).first));
-    }
-    MDEBUG("asking for " << req.txs_hashes.size() << " transactions");
-    req.decode_as_json = false;
-    req.prune = true;
-
-    bool r;
+  m_node_rpc_proxy.get_transactions(txids,
+    [this, &txids, &process_txs](const cryptonote::COMMAND_RPC_GET_TRANSACTIONS::request &req_t, const cryptonote::COMMAND_RPC_GET_TRANSACTIONS::response &resp_t, bool r)
     {
-      const boost::lock_guard<boost::recursive_mutex> lock{m_daemon_rpc_mutex};
-      uint64_t pre_call_credits = m_rpc_payment_state.credits;
-      req.client = get_client_signature();
-      r = epee::net_utils::invoke_http_json("/gettransactions", req, res, *m_http_client, rpc_timeout);
-      if (r && res.status == CORE_RPC_STATUS_OK)
-        check_rpc_cost("/gettransactions", res.credits, pre_call_credits, res.txs.size() * COST_PER_TX);
+      read_pool_txs(req_t, resp_t, r, txids, process_txs);
+      if (!r || resp_t.status != CORE_RPC_STATUS_OK)
+        LOG_PRINT_L0("Error calling gettransactions daemon RPC: r " << r << ", status " << get_rpc_status(resp_t.status));
     }
+  );
 
-    MDEBUG("Got " << r << " and " << res.status);
-    if (r && res.status == CORE_RPC_STATUS_OK)
-    {
-      if (res.txs.size() == req.txs_hashes.size())
-      {
-        for (const auto &tx_entry: res.txs)
-        {
-          if (tx_entry.in_pool)
-          {
-            cryptonote::transaction tx;
-            cryptonote::blobdata bd;
-            crypto::hash tx_hash;
-
-            if (get_pruned_tx(tx_entry, tx, tx_hash))
-            {
-                const std::vector<std::pair<crypto::hash, bool>>::const_iterator i = std::find_if(txids.begin(), txids.end(),
-                    [tx_hash](const std::pair<crypto::hash, bool> &e) { return e.first == tx_hash; });
-                if (i != txids.end())
-                {
-                  process_txs.push_back(std::make_tuple(tx, tx_hash, tx_entry.double_spend_seen));
-                }
-                else
-                {
-                  MERROR("Got txid " << tx_hash << " which we did not ask for");
-                }
-            }
-            else
-            {
-              LOG_PRINT_L0("Failed to parse transaction from daemon");
-            }
-          }
-          else
-          {
-            LOG_PRINT_L1("Transaction from daemon was in pool, but is no more");
-          }
-        }
-      }
-      else
-      {
-        LOG_PRINT_L0("Expected " << n_txids << " out of " << txids.size() << " tx(es), got " << res.txs.size());
-      }
-    }
-    else
-    {
-      LOG_PRINT_L0("Error calling gettransactions daemon RPC: r " << r << ", status " << get_rpc_status(res.status));
-    }
-  }
   MTRACE("update_pool_state_by_pool_query end");
 }
 //----------------------------------------------------------------------------------------------------
@@ -3673,15 +3687,13 @@ void wallet2::update_pool_state_by_pool_query(std::vector<std::tuple<cryptonote:
 // txs that are new in the pool since the last time we queried and the ids of txs that were
 // removed from the pool since then, or the whole content of the pool if incremental was not
 // possible, e.g. because the server was just started or restarted.
-void wallet2::update_pool_state_from_pool_data(const cryptonote::COMMAND_RPC_GET_BLOCKS_FAST::response &res, std::vector<std::tuple<cryptonote::transaction, crypto::hash, bool>> &process_txs, bool refreshed)
+void wallet2::update_pool_state_from_pool_data(bool incremental, const std::vector<crypto::hash> &removed_pool_txids, const std::vector<std::tuple<cryptonote::transaction, crypto::hash, bool>> &added_pool_txs, std::vector<std::tuple<cryptonote::transaction, crypto::hash, bool>> &process_txs, bool refreshed)
 {
   MTRACE("update_pool_state_from_pool_data start");
   auto keys_reencryptor = epee::misc_utils::create_scope_leave_handler([&, this]() {
     m_encrypt_keys_after_refresh.reset();
   });
 
-  bool incremental = res.pool_info_extent == COMMAND_RPC_GET_BLOCKS_FAST::INCREMENTAL;
-
   if (refreshed)
   {
     if (incremental)
@@ -3690,7 +3702,7 @@ void wallet2::update_pool_state_from_pool_data(const cryptonote::COMMAND_RPC_GET
       // pool; do so only after refresh to not delete too early and too eagerly; maybe we will find the tx
       // later in a block, or not, or find it again in the pool txs because it was first removed but then
       // somehow quickly "resurrected" - that all does not matter here, we retrace the removal
-      remove_obsolete_pool_txs(res.removed_pool_txids, true);
+      remove_obsolete_pool_txs(removed_pool_txids, true);
     }
     else
     {
@@ -3698,10 +3710,10 @@ void wallet2::update_pool_state_from_pool_data(const cryptonote::COMMAND_RPC_GET
       // unfortunate that we have to build a new vector with ids first, but better than copying and
       // modifying the code of 'remove_obsolete_pool_txs' here
       std::vector<crypto::hash> txids;
-      txids.reserve(res.added_pool_txs.size());
-      for (const auto &it: res.added_pool_txs)
+      txids.reserve(added_pool_txs.size());
+      for (const auto &pool_tx: added_pool_txs)
       {
-        txids.push_back(it.tx_hash);
+        txids.push_back(std::get<1>(pool_tx));
       }
       remove_obsolete_pool_txs(txids, false);
     }
@@ -3715,9 +3727,9 @@ void wallet2::update_pool_state_from_pool_data(const cryptonote::COMMAND_RPC_GET
     const crypto::hash &txid = it->first;
     MDEBUG("Checking m_unconfirmed_txs entry " << txid);
     bool found = false;
-    for (const auto &it2: res.added_pool_txs)
+    for (const auto &pool_tx: added_pool_txs)
     {
-      if (it2.tx_hash == txid)
+      if (std::get<1>(pool_tx) == txid)
       {
         found = true;
         break;
@@ -3732,16 +3744,11 @@ void wallet2::update_pool_state_from_pool_data(const cryptonote::COMMAND_RPC_GET
   // if we work incrementally and thus see only new pool txs since last time we asked it should
   // be rare that we know already about one of those, but check nevertheless
   process_txs.clear();
-  for (const auto &pool_tx: res.added_pool_txs)
+  for (const auto &pool_tx: added_pool_txs)
   {
-    cryptonote::transaction tx;
-    THROW_WALLET_EXCEPTION_IF(!cryptonote::parse_and_validate_tx_from_blob(pool_tx.tx_blob, tx),
-        error::wallet_internal_error, "Failed to validate transaction from daemon");
-    const crypto::hash &txid = pool_tx.tx_hash;
-    bool take = accept_pool_tx_for_processing(txid);
-    if (take)
+    if (accept_pool_tx_for_processing(std::get<1>(pool_tx)))
     {
-      process_txs.push_back(std::make_tuple(tx, txid, pool_tx.double_spend_seen));
+      process_txs.push_back(pool_tx);
     }
   }
 
@@ -4323,6 +4330,7 @@ bool wallet2::clear()
   m_subaddress_labels.clear();
   m_multisig_rounds_passed = 0;
   m_device_last_key_image_sync = 0;
+  m_pool_info_query_time = 0;
   m_skip_to_height = 0;
   return true;
 }
@@ -4340,6 +4348,7 @@ void wallet2::clear_soft(bool keep_key_images)
   m_unconfirmed_payments.clear();
   m_scanned_pool_txs[0].clear();
   m_scanned_pool_txs[1].clear();
+  m_pool_info_query_time = 0;
   m_skip_to_height = 0;
 
   cryptonote::block b;

src/wallet/wallet2.h

@@ -1740,8 +1740,9 @@ private:
     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, std::map<std::pair<uint64_t, uint64_t>, size_t> *output_tracker_cache = NULL);
     bool accept_pool_tx_for_processing(const crypto::hash &txid);
     void process_unconfirmed_transfer(bool incremental, const crypto::hash &txid, wallet2::unconfirmed_transfer_details &tx_details, bool seen_in_pool, std::chrono::system_clock::time_point now, bool refreshed);
+    void process_pool_info_extent(const cryptonote::COMMAND_RPC_GET_BLOCKS_FAST::response &res, std::vector<std::tuple<cryptonote::transaction, crypto::hash, bool>> &process_txs, bool refreshed);
     void update_pool_state_by_pool_query(std::vector<std::tuple<cryptonote::transaction, crypto::hash, bool>> &process_txs, bool refreshed = false);
-    void update_pool_state_from_pool_data(const cryptonote::COMMAND_RPC_GET_BLOCKS_FAST::response &res, std::vector<std::tuple<cryptonote::transaction, crypto::hash, bool>> &process_txs, bool refreshed);
+    void update_pool_state_from_pool_data(bool incremental, const std::vector<crypto::hash> &removed_pool_txids, const std::vector<std::tuple<cryptonote::transaction, crypto::hash, bool>> &added_pool_txs, std::vector<std::tuple<cryptonote::transaction, crypto::hash, bool>> &process_txs, bool refreshed);
     uint64_t select_transfers(uint64_t needed_money, std::vector<size_t> unused_transfers_indices, std::vector<size_t>& selected_transfers) const;
     bool prepare_file_names(const std::string& file_path);
     void process_unconfirmed(const crypto::hash &txid, const cryptonote::transaction& tx, uint64_t height);

src/wallet/wallet_rpc_server.cpp

@@ -149,8 +149,10 @@ namespace tools
         return true;
       if (boost::posix_time::microsec_clock::universal_time() < m_last_auto_refresh_time + boost::posix_time::seconds(m_auto_refresh_period))
         return true;
+      uint64_t blocks_fetched = 0;
       try {
-        if (m_wallet) m_wallet->refresh(m_wallet->is_trusted_daemon());
+        bool received_money = false;
+        if (m_wallet) m_wallet->refresh(m_wallet->is_trusted_daemon(), 0, blocks_fetched, received_money, true, true);
       } catch (const std::exception& ex) {
         LOG_ERROR("Exception at while refreshing, what=" << ex.what());
       }