node_rpc_proxy: factor a few RPC calls using get_info

Takes advantage of caching

src/simplewallet/simplewallet.cpp

@@ -4277,12 +4277,7 @@ uint64_t simple_wallet::get_daemon_blockchain_height(std::string& err)
   {
     throw std::runtime_error("simple_wallet null wallet");
   }
-
+  return m_wallet->get_daemon_blockchain_height(err);
-  COMMAND_RPC_GET_HEIGHT::request req;
-  COMMAND_RPC_GET_HEIGHT::response res = boost::value_initialized<COMMAND_RPC_GET_HEIGHT::response>();
-  bool r = m_wallet->invoke_http_json("/getheight", req, res);
-  err = interpret_rpc_response(r, res.status);
-  return res.height;
 }
 //----------------------------------------------------------------------------------------------------
 bool simple_wallet::show_blockchain_height(const std::vector<std::string>& args)

src/wallet/node_rpc_proxy.cpp

@@ -41,21 +41,13 @@ static const std::chrono::seconds rpc_timeout = std::chrono::minutes(3) + std::c
 NodeRPCProxy::NodeRPCProxy(epee::net_utils::http::http_simple_client &http_client, boost::mutex &mutex)
   : m_http_client(http_client)
   , m_daemon_rpc_mutex(mutex)
-  , m_height(0)
+{
-  , m_height_time(0)
+  invalidate();
-  , m_earliest_height()
+}
-  , m_dynamic_per_kb_fee_estimate(0)
-  , m_dynamic_per_kb_fee_estimate_cached_height(0)
-  , m_dynamic_per_kb_fee_estimate_grace_blocks(0)
-  , m_rpc_version(0)
-  , m_target_height(0)
-  , m_target_height_time(0)
-{}
 
 void NodeRPCProxy::invalidate()
 {
   m_height = 0;
-  m_height_time = 0;
   for (size_t n = 0; n < 256; ++n)
     m_earliest_height[n] = 0;
   m_dynamic_per_kb_fee_estimate = 0;
@@ -63,7 +55,8 @@ void NodeRPCProxy::invalidate()
   m_dynamic_per_kb_fee_estimate_grace_blocks = 0;
   m_rpc_version = 0;
   m_target_height = 0;
-  m_target_height_time = 0;
+  m_block_size_limit = 0;
+  m_get_info_time = 0;
 }
 
 boost::optional<std::string> NodeRPCProxy::get_rpc_version(uint32_t &rpc_version) const
@@ -84,36 +77,15 @@ boost::optional<std::string> NodeRPCProxy::get_rpc_version(uint32_t &rpc_version
   return boost::optional<std::string>();
 }
 
-boost::optional<std::string> NodeRPCProxy::get_height(uint64_t &height) const
-{
-  const time_t now = time(NULL);
-  if (m_height == 0 || now >= m_height_time + 30) // re-cache every 30 seconds
-  {
-    cryptonote::COMMAND_RPC_GET_HEIGHT::request req = AUTO_VAL_INIT(req);
-    cryptonote::COMMAND_RPC_GET_HEIGHT::response res = AUTO_VAL_INIT(res);
-
-    m_daemon_rpc_mutex.lock();
-    bool r = net_utils::invoke_http_json("/getheight", req, res, m_http_client, rpc_timeout);
-    m_daemon_rpc_mutex.unlock();
-    CHECK_AND_ASSERT_MES(r, std::string(), "Failed to connect to daemon");
-    CHECK_AND_ASSERT_MES(res.status != CORE_RPC_STATUS_BUSY, res.status, "Failed to connect to daemon");
-    CHECK_AND_ASSERT_MES(res.status == CORE_RPC_STATUS_OK, res.status, "Failed to get current blockchain height");
-    m_height = res.height;
-    m_height_time = now;
-  }
-  height = m_height;
-  return boost::optional<std::string>();
-}
-
 void NodeRPCProxy::set_height(uint64_t h)
 {
   m_height = h;
 }
 
-boost::optional<std::string> NodeRPCProxy::get_target_height(uint64_t &height) const
+boost::optional<std::string> NodeRPCProxy::get_info() const
 {
   const time_t now = time(NULL);
-  if (m_target_height == 0 || now >= m_target_height_time + 30) // re-cache every 30 seconds
+  if (now >= m_get_info_time + 30) // re-cache every 30 seconds
   {
     cryptonote::COMMAND_RPC_GET_INFO::request req_t = AUTO_VAL_INIT(req_t);
     cryptonote::COMMAND_RPC_GET_INFO::response resp_t = AUTO_VAL_INIT(resp_t);
@@ -125,13 +97,41 @@ boost::optional<std::string> NodeRPCProxy::get_target_height(uint64_t &height) c
     CHECK_AND_ASSERT_MES(r, std::string(), "Failed to connect to daemon");
     CHECK_AND_ASSERT_MES(resp_t.status != CORE_RPC_STATUS_BUSY, resp_t.status, "Failed to connect to daemon");
     CHECK_AND_ASSERT_MES(resp_t.status == CORE_RPC_STATUS_OK, resp_t.status, "Failed to get target blockchain height");
+    m_height = resp_t.height;
     m_target_height = resp_t.target_height;
-    m_target_height_time = now;
+    m_block_size_limit = resp_t.block_size_limit;
+    m_get_info_time = now;
   }
+  return boost::optional<std::string>();
+}
+
+boost::optional<std::string> NodeRPCProxy::get_height(uint64_t &height) const
+{
+  auto res = get_info();
+  if (res)
+    return res;
+  height = m_height;
+  return boost::optional<std::string>();
+}
+
+boost::optional<std::string> NodeRPCProxy::get_target_height(uint64_t &height) const
+{
+  auto res = get_info();
+  if (res)
+    return res;
   height = m_target_height;
   return boost::optional<std::string>();
 }
 
+boost::optional<std::string> NodeRPCProxy::get_block_size_limit(uint64_t &block_size_limit) const
+{
+  auto res = get_info();
+  if (res)
+    return res;
+  block_size_limit = m_block_size_limit;
+  return boost::optional<std::string>();
+}
+
 boost::optional<std::string> NodeRPCProxy::get_earliest_height(uint8_t version, uint64_t &earliest_height) const
 {
   if (m_earliest_height[version] == 0)

src/wallet/node_rpc_proxy.h

@@ -47,22 +47,25 @@ public:
   boost::optional<std::string> get_height(uint64_t &height) const;
   void set_height(uint64_t h);
   boost::optional<std::string> get_target_height(uint64_t &height) const;
+  boost::optional<std::string> get_block_size_limit(uint64_t &block_size_limit) const;
   boost::optional<std::string> get_earliest_height(uint8_t version, uint64_t &earliest_height) const;
   boost::optional<std::string> get_dynamic_per_kb_fee_estimate(uint64_t grace_blocks, uint64_t &fee) const;
 
 private:
+  boost::optional<std::string> get_info() const;
+
   epee::net_utils::http::http_simple_client &m_http_client;
   boost::mutex &m_daemon_rpc_mutex;
 
   mutable uint64_t m_height;
-  mutable time_t m_height_time;
   mutable uint64_t m_earliest_height[256];
   mutable uint64_t m_dynamic_per_kb_fee_estimate;
   mutable uint64_t m_dynamic_per_kb_fee_estimate_cached_height;
   mutable uint64_t m_dynamic_per_kb_fee_estimate_grace_blocks;
   mutable uint32_t m_rpc_version;
   mutable uint64_t m_target_height;
-  mutable time_t m_target_height_time;
+  mutable uint64_t m_block_size_limit;
+  mutable time_t m_get_info_time;
 };
 
 }

src/wallet/wallet2.cpp

@@ -5600,15 +5600,10 @@ uint32_t wallet2::adjust_priority(uint32_t priority)
       }
 
       // get the current full reward zone
-      cryptonote::COMMAND_RPC_GET_INFO::request getinfo_req = AUTO_VAL_INIT(getinfo_req);
+      uint64_t block_size_limit = 0;
-      cryptonote::COMMAND_RPC_GET_INFO::response getinfo_res = AUTO_VAL_INIT(getinfo_res);
+      const auto result = m_node_rpc_proxy.get_block_size_limit(block_size_limit);
-      m_daemon_rpc_mutex.lock();
+      throw_on_rpc_response_error(result, "get_info");
-      bool r = net_utils::invoke_http_json_rpc("/json_rpc", "get_info", getinfo_req, getinfo_res, m_http_client);
+      const uint64_t full_reward_zone = block_size_limit / 2;
-      m_daemon_rpc_mutex.unlock();
-      THROW_WALLET_EXCEPTION_IF(!r, error::no_connection_to_daemon, "get_info");
-      THROW_WALLET_EXCEPTION_IF(getinfo_res.status == CORE_RPC_STATUS_BUSY, error::daemon_busy, "get_info");
-      THROW_WALLET_EXCEPTION_IF(getinfo_res.status != CORE_RPC_STATUS_OK, error::get_tx_pool_error);
-      const uint64_t full_reward_zone = getinfo_res.block_size_limit / 2;
 
       // get the last N block headers and sum the block sizes
       const size_t N = 10;
@@ -5622,7 +5617,7 @@ uint32_t wallet2::adjust_priority(uint32_t priority)
       m_daemon_rpc_mutex.lock();
       getbh_req.start_height = m_blockchain.size() - N;
       getbh_req.end_height = m_blockchain.size() - 1;
-      r = net_utils::invoke_http_json_rpc("/json_rpc", "getblockheadersrange", getbh_req, getbh_res, m_http_client, rpc_timeout);
+      bool r = net_utils::invoke_http_json_rpc("/json_rpc", "getblockheadersrange", getbh_req, getbh_res, m_http_client, rpc_timeout);
       m_daemon_rpc_mutex.unlock();
       THROW_WALLET_EXCEPTION_IF(!r, error::no_connection_to_daemon, "getblockheadersrange");
       THROW_WALLET_EXCEPTION_IF(getbh_res.status == CORE_RPC_STATUS_BUSY, error::daemon_busy, "getblockheadersrange");
@@ -9384,31 +9379,15 @@ uint64_t wallet2::get_daemon_blockchain_height(string &err) const
 
 uint64_t wallet2::get_daemon_blockchain_target_height(string &err)
 {
-  cryptonote::COMMAND_RPC_GET_INFO::request req_t = AUTO_VAL_INIT(req_t);
+  err = "";
-  cryptonote::COMMAND_RPC_GET_INFO::response resp_t = AUTO_VAL_INIT(resp_t);
+  uint64_t target_height = 0;
-  m_daemon_rpc_mutex.lock();
+  const auto result = m_node_rpc_proxy.get_target_height(target_height);
-  bool ok = net_utils::invoke_http_json_rpc("/json_rpc", "get_info", req_t, resp_t, m_http_client);
+  if (result && *result != CORE_RPC_STATUS_OK)
-  m_daemon_rpc_mutex.unlock();
-  if (ok)
   {
-    if (resp_t.status == CORE_RPC_STATUS_BUSY)
+    err= *result;
-    {
+    return 0;
-      err = "daemon is busy. Please try again later.";
-    }
-    else if (resp_t.status != CORE_RPC_STATUS_OK)
-    {
-      err = resp_t.status;
-    }
-    else // success, cleaning up error message
-    {
-      err = "";
-    }
   }
-  else
+  return target_height;
-  {
-    err = "possibly lost connection to daemon";
-  }
-  return resp_t.target_height;
 }
 
 uint64_t wallet2::get_approximate_blockchain_height() const
@@ -10766,15 +10745,10 @@ std::vector<std::pair<uint64_t, uint64_t>> wallet2::estimate_backlog(const std::
   THROW_WALLET_EXCEPTION_IF(res.status == CORE_RPC_STATUS_BUSY, error::daemon_busy, "get_txpool_backlog");
   THROW_WALLET_EXCEPTION_IF(res.status != CORE_RPC_STATUS_OK, error::get_tx_pool_error);
 
-  cryptonote::COMMAND_RPC_GET_INFO::request req_t = AUTO_VAL_INIT(req_t);
+  uint64_t block_size_limit = 0;
-  cryptonote::COMMAND_RPC_GET_INFO::response resp_t = AUTO_VAL_INIT(resp_t);
+  const auto result = m_node_rpc_proxy.get_block_size_limit(block_size_limit);
-  m_daemon_rpc_mutex.lock();
+  throw_on_rpc_response_error(result, "get_info");
-  r = net_utils::invoke_http_json_rpc("/json_rpc", "get_info", req_t, resp_t, m_http_client);
+  uint64_t full_reward_zone = block_size_limit / 2;
-  m_daemon_rpc_mutex.unlock();
-  THROW_WALLET_EXCEPTION_IF(!r, error::no_connection_to_daemon, "get_info");
-  THROW_WALLET_EXCEPTION_IF(resp_t.status == CORE_RPC_STATUS_BUSY, error::daemon_busy, "get_info");
-  THROW_WALLET_EXCEPTION_IF(resp_t.status != CORE_RPC_STATUS_OK, error::get_tx_pool_error);
-  uint64_t full_reward_zone = resp_t.block_size_limit / 2;
 
   std::vector<std::pair<uint64_t, uint64_t>> blocks;
   for (const auto &fee_level: fee_levels)