Add option for overwrite last hardfork

libraries/app/application.cpp

@@ -796,6 +796,11 @@ public:
    }
 
    virtual fc::time_point_sec get_last_known_hardfork_time() override {
+      if( _additional_test_hardfork > _chain_db->_hardfork_times[_chain_db->_hardfork_times.size() - 1] )
+      {
+         return _additional_test_hardfork;
+      }
+
       return _chain_db->_hardfork_times[_chain_db->_hardfork_times.size() - 1];
    }
 
@@ -844,6 +849,11 @@ public:
    std::map<string, std::shared_ptr<abstract_plugin>> _available_plugins;
 
    bool _is_finished_syncing = false;
+
+   // it's used only for testing. It should be deleted once testing
+   // for non compatible witnesses is done
+   fc::time_point_sec _additional_test_hardfork;
+
 };
 
 } // namespace detail
@@ -1006,6 +1016,10 @@ void graphene::app::application::add_available_plugin(std::shared_ptr<graphene::
    my->_available_plugins[p->plugin_name()] = p;
 }
 
+void graphene::app::application::add_additional_hardfork(fc::time_point_sec hardfork) {
+   my->_additional_test_hardfork = hardfork;
+}
+
 void application::shutdown_plugins() {
    for (auto &entry : my->_active_plugins)
       entry.second->plugin_shutdown();

libraries/app/include/graphene/app/application.hpp

@@ -73,6 +73,8 @@ public:
    }
    std::shared_ptr<abstract_plugin> get_plugin(const string &name) const;
 
+   void add_additional_hardfork(fc::time_point_sec hardfork);
+
    template <typename PluginType>
    std::shared_ptr<PluginType> get_plugin(const string &name) const {
       std::shared_ptr<abstract_plugin> abs_plugin = get_plugin(name);

libraries/plugins/witness/witness.cpp

@@ -74,6 +74,7 @@ void witness_plugin::plugin_set_program_options(
           ("ID of witness controlled by this node (e.g. " + witness_id_example + ", quotes are required, may specify multiple times)").c_str())
          ("witness-ids,W", bpo::value<string>(),
           ("IDs of multiple witnesses controlled by this node (e.g. [" + witness_id_example + ", " + witness_id_example2 + "], quotes are required)").c_str())
+         ("hardfork", bpo::value<string>())
          ("private-key", bpo::value<vector<string>>()->composing()->multitoken()->
           DEFAULT_VALUE_VECTOR(std::make_pair(chain::public_key_type(default_priv_key.get_public_key()), graphene::utilities::key_to_wif(default_priv_key))),
           "Tuple of [PublicKey, WIF private key] (may specify multiple times)")
@@ -120,6 +121,18 @@ void witness_plugin::plugin_initialize(const boost::program_options::variables_m
          _private_keys[key_id_to_wif_pair.first] = *private_key;
       }
    }
+
+   if ( options.count("hardfork") )
+   {
+      if (options.count("hardfork") > 1 )
+      {
+         FC_THROW("Please define only one hardfork ahead for the witness");
+      }
+
+      std::string hardfork_string = options["hardfork"].as<std::string>();
+      app().add_additional_hardfork(fc::time_point_sec::from_iso_string(hardfork_string));
+   }
+
    ilog("witness plugin:  plugin_initialize() end");
 } FC_LOG_AND_RETHROW() }