limit future blk time to 10 min

src/cryptonote_config.h

@@ -46,6 +46,7 @@
 #define CURRENT_TRANSACTION_VERSION                     2
 #define CURRENT_BLOCK_MAJOR_VERSION                     7
 #define CURRENT_BLOCK_MINOR_VERSION                     7
+#define CRYPTONOTE_BLOCK_FUTURE_TIME_LIMIT_V2           300*2
 #define CRYPTONOTE_BLOCK_FUTURE_TIME_LIMIT              60*60*2
 #define CRYPTONOTE_DEFAULT_TX_SPENDABLE_AGE             4
 

src/cryptonote_core/blockchain.cpp

@@ -4061,9 +4061,11 @@ bool Blockchain::check_block_timestamp(std::vector<uint64_t>& timestamps, const
 bool Blockchain::check_block_timestamp(const block& b, uint64_t& median_ts) const
 {
   LOG_PRINT_L3("Blockchain::" << __func__);
-  if(b.timestamp > (uint64_t)time(NULL) + CRYPTONOTE_BLOCK_FUTURE_TIME_LIMIT)
+  uint8_t version = get_current_hard_fork_version();
+  uint64_t cryptonote_block_future_time_limit = version >= 8 ? CRYPTONOTE_BLOCK_FUTURE_TIME_LIMIT_V2 : CRYPTONOTE_BLOCK_FUTURE_TIME_LIMIT;
+  if(b.timestamp > (uint64_t)time(NULL) + cryptonote_block_future_time_limit)
   {
-    MERROR_VER("Timestamp of block with id: " << get_block_hash(b) << ", " << b.timestamp << ", bigger than local time + 2 hours");
+    MERROR_VER("Timestamp of block with id: " << get_block_hash(b) << ", " << b.timestamp << ", bigger than local time + 10 minutes");
     return false;
   }