Fix block timestamp tolerance from 0 to 1 second, Fix #3041

plugins/producer_plugin/producer_plugin.cpp

@@ -182,9 +182,7 @@ class producer_plugin_impl {
 
       void on_incoming_block(const signed_block_ptr& block) {
 
-         if( block->timestamp > fc::time_point::now() ) {
-            FC_ASSERT( block->timestamp < fc::time_point::now(), "received a block from the future, ignoring it" );
-         }
+         FC_ASSERT( block->timestamp < (fc::time_point::now() + fc::seconds(1)), "received a block from the future, ignoring it" );
 
 
          chain::controller& chain = app().get_plugin<chain_plugin>().chain();