Merge pull request #2124

3b599d2b wallet2: get current height from the daemon on creation (moneromooo-monero)
d3bb72ff wallet2: fix infinite loop on future refresh height (moneromooo-monero)
32754784 wallet: fix refresh_from_height setting on new wallet (moneromooo-monero)

src/simplewallet/simplewallet.cpp

@@ -929,8 +929,6 @@ static bool might_be_partial_seed(std::string words)
 //----------------------------------------------------------------------------------------------------
 bool simple_wallet::init(const boost::program_options::variables_map& vm)
 {
-  bool need_refresh_height = false;
-
   if (!handle_command_line(vm))
     return false;
 
@@ -1128,8 +1126,6 @@ bool simple_wallet::init(const boost::program_options::variables_map& vm)
       m_wallet_file = m_generate_new;
       bool r = new_wallet(vm, m_recovery_key, m_restore_deterministic_wallet, m_non_deterministic, old_language);
       CHECK_AND_ASSERT_MES(r, false, tr("account creation failed"));
-      if (!m_restore_deterministic_wallet)
-        need_refresh_height = true;
     }
     if (!m_restore_height && m_restoring)
     {
@@ -1222,14 +1218,6 @@ bool simple_wallet::init(const boost::program_options::variables_map& vm)
   m_http_client.set_server(m_wallet->get_daemon_address(), m_wallet->get_daemon_login());
   m_wallet->callback(this);
 
-  if (need_refresh_height)
-  {
-    // for a totally new account, we don't care about older blocks.
-    MDEBUG("Calling daemon to set refresh height");
-    std::string err;
-    m_wallet->set_refresh_from_block_height(get_daemon_blockchain_height(err));
-  }
-
   return true;
 }
 //----------------------------------------------------------------------------------------------------

src/wallet/wallet2.cpp

@@ -1601,7 +1601,7 @@ void wallet2::fast_refresh(uint64_t stop_height, uint64_t &blocks_start_height,
   while(m_run.load(std::memory_order_relaxed) && current_index < stop_height)
   {
     pull_hashes(0, blocks_start_height, short_chain_history, hashes);
-    if (hashes.size() < 3)
+    if (hashes.size() <= 3)
       return;
     if (hashes.size() + current_index < stop_height) {
       std::list<crypto::hash>::iterator right;
@@ -2165,14 +2165,23 @@ crypto::secret_key wallet2::generate(const std::string& wallet_, const std::stri
   m_account_public_address = m_account.get_keys().m_account_address;
   m_watch_only = false;
 
-  if(m_refresh_from_block_height == 0 && !recover){
-    // Wallets created offline don't know blockchain height.
-    // Set blockchain height calculated from current date/time
   // -1 month for fluctuations in block time and machine date/time setup.
   // avg seconds per block
   const int seconds_per_block = DIFFICULTY_TARGET_V2;
   // ~num blocks per month
   const uint64_t blocks_per_month = 60*60*24*30/seconds_per_block;
+
+  // try asking the daemon first
+  if(m_refresh_from_block_height == 0 && !recover){
+    std::string err;
+    uint64_t height = get_daemon_blockchain_height(err);
+    if (err.empty())
+      m_refresh_from_block_height = height - blocks_per_month;
+  }
+
+  if(m_refresh_from_block_height == 0 && !recover){
+    // Wallets created offline don't know blockchain height.
+    // Set blockchain height calculated from current date/time
     uint64_t approx_blockchain_height = get_approximate_blockchain_height();
     if(approx_blockchain_height > 0) {
       m_refresh_from_block_height = approx_blockchain_height - blocks_per_month;
@@ -5010,11 +5019,10 @@ uint64_t wallet2::get_daemon_blockchain_target_height(string &err)
 
 uint64_t wallet2::get_approximate_blockchain_height() const
 {
-  if (m_testnet) return 0;
   // time of v2 fork
-  const time_t fork_time = 1458748658;
+  const time_t fork_time = m_testnet ? 1448285909 : 1458748658;
   // v2 fork block
-  const uint64_t fork_block = 1009827;
+  const uint64_t fork_block = m_testnet ? 624634 : 1009827;
   // avg seconds per block
   const int seconds_per_block = DIFFICULTY_TARGET_V2;
   // Calculated blockchain height