2 files changed, 20 insertions, 3 deletions
diff --git a/src/cryptonote_core/cryptonote_core.cpp b/src/cryptonote_core/cryptonote_core.cpp
index 4bada999f..18625de98 100644
--- a/src/cryptonote_core/cryptonote_core.cpp
+++ b/src/cryptonote_core/cryptonote_core.cpp
@@ -346,13 +346,21 @@ namespace cryptonote
     BlockchainDB::init_options(desc);
   }
   //-----------------------------------------------------------------------------------------------
+  network_type core::get_network_type_from_args(const boost::program_options::variables_map& vm)
+  {
+    const bool testnet = command_line::get_arg(vm, arg_testnet_on);
+    const bool stagenet = command_line::get_arg(vm, arg_stagenet_on);
+    const bool regtest = command_line::get_arg(vm, arg_regtest_on);
+    if (testnet + stagenet + regtest > 1)
+      throw std::runtime_error("More than one network type argument was specified");
+    return testnet ? TESTNET : stagenet ? STAGENET : regtest ? FAKECHAIN : MAINNET;
+  }
+  //-----------------------------------------------------------------------------------------------
   bool core::handle_command_line(const boost::program_options::variables_map& vm)
   {
     if (m_nettype != FAKECHAIN)
     {
-      const bool testnet = command_line::get_arg(vm, arg_testnet_on);
-      const bool stagenet = command_line::get_arg(vm, arg_stagenet_on);
-      m_nettype = testnet ? TESTNET : stagenet ? STAGENET : MAINNET;
+      m_nettype = get_network_type_from_args(vm);
     }
 
     m_config_folder = command_line::get_arg(vm, arg_data_dir);
diff --git a/src/cryptonote_core/cryptonote_core.h b/src/cryptonote_core/cryptonote_core.h
index 7806fe495..777de3319 100644
--- a/src/cryptonote_core/cryptonote_core.h
+++ b/src/cryptonote_core/cryptonote_core.h
@@ -277,6 +277,15 @@ namespace cryptonote
      static void init_options(boost::program_options::options_description& desc);
 
      /**
+      * @brief resolves the network type based on command line arguments
+      * @param vm variables map
+      * @return network type corresponding to arg_{testnet,stagenet,regtest}_on, defaulting to MAINNET
+      * @throw std::runtime_error if more than 1 of arg_{testnet,stagenet,regtest}_on is present
+      * @throw boost::bad_any_cast if arg_{testnet,stagenet,regtest}_on weren't added to vm
+      */
+     static network_type get_network_type_from_args(const boost::program_options::variables_map& vm);
+
+     /**
       * @brief initializes the core as needed
       *
       * This function initializes the transaction pool, the Blockchain, and