wallet2: adapt get_approximate_blockchain_height

src/wallet/wallet2.cpp

@@ -9168,18 +9168,14 @@ uint64_t wallet2::get_daemon_blockchain_target_height(string &err)
 
 uint64_t wallet2::get_approximate_blockchain_height() const
 {
-  // time of v2 fork
-  const time_t fork_time = m_nettype == TESTNET ? 1448285909 : m_nettype == STAGENET ? 1520937818 : 1458748658;
-  // v2 fork block
-  const uint64_t fork_block = m_nettype == TESTNET ? 624634 : m_nettype == STAGENET ? 32000 : 1009827;
+  // time of v8 fork
+  const time_t fork_time = m_nettype == TESTNET ? 1523255371 : 1524214739;
+  // v8 fork block
+  const uint64_t fork_block = m_nettype == TESTNET ? 10 : 6969;
   // avg seconds per block
   const int seconds_per_block = DIFFICULTY_TARGET_V2;
   // Calculated blockchain height
   uint64_t approx_blockchain_height = fork_block + (time(NULL) - fork_time)/seconds_per_block;
-  // testnet got some huge rollbacks, so the estimation is way off
-  static const uint64_t approximate_testnet_rolled_back_blocks = 148540;
-  if (m_nettype == TESTNET && approx_blockchain_height > approximate_testnet_rolled_back_blocks)
-    approx_blockchain_height -= approximate_testnet_rolled_back_blocks;
   LOG_PRINT_L2("Calculated blockchain height: " << approx_blockchain_height);
   return approx_blockchain_height;
 }