text: // Copyright (c) 2010 Satoshi Nakamoto
  // Copyright (c) 2009-2019 The Bitcoin Core developers
  // Distributed under the MIT software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #include <chainparamsbase.h>
  
  #include <tinyformat.h>
  #include <util/system.h>
  #include <util/memory.h>
  
  #include <assert.h>
  
  const std::string CBaseChainParams::MAIN = "main";
  const std::string CBaseChainParams::TESTNET = "test";
  const std::string CBaseChainParams::SIGNET = "signet";
  const std::string CBaseChainParams::REGTEST = "regtest";
  
  void SetupChainParamsBaseOptions(ArgsManager& argsman)
  {
      argsman.AddArg("-chain=<chain>", "Use the chain <chain> (default: main). Allowed values: main, test, signet, regtest", ArgsManager::ALLOW_ANY, OptionsCategory::CHAINPARAMS);
      argsman.AddArg("-regtest", "Enter regression test mode, which uses a special chain in which blocks can be solved instantly. "
                   "This is intended for regression testing tools and app development. Equivalent to -chain=regtest.", ArgsManager::ALLOW_ANY | ArgsManager::DEBUG_ONLY, OptionsCategory::CHAINPARAMS);
      argsman.AddArg("-segwitheight=<n>", "Set the activation height of segwit. -1 to disable. (regtest-only)", ArgsManager::ALLOW_ANY | ArgsManager::DEBUG_ONLY, OptionsCategory::DEBUG_TEST);
      argsman.AddArg("-testnet", "Use the test chain. Equivalent to -chain=test.", ArgsManager::ALLOW_ANY, OptionsCategory::CHAINPARAMS);
      argsman.AddArg("-vbparams=deployment:start:end[:min_activation_height]", "Use given start/end times and min_activation_height for specified version bits deployment (regtest-only)", ArgsManager::ALLOW_ANY | ArgsManager::DEBUG_ONLY, OptionsCategory::CHAINPARAMS);
      argsman.AddArg("-signet", "Use the signet chain. Equivalent to -chain=signet. Note that the network is defined by the -signetchallenge parameter", ArgsManager::ALLOW_ANY, OptionsCategory::CHAINPARAMS);
      argsman.AddArg("-signetchallenge", "Blocks must satisfy the given script to be considered valid (only for signet networks; defaults to the global default signet test network challenge)", ArgsManager::ALLOW_STRING, OptionsCategory::CHAINPARAMS);
      argsman.AddArg("-signetseednode", "Specify a seed node for the signet network, in the hostname[:port] format, e.g. sig.net:1234 (may be used multiple times to specify multiple seed nodes; defaults to the global default signet test network seed node(s))", ArgsManager::ALLOW_STRING, OptionsCategory::CHAINPARAMS);
  }
  
  static std::unique_ptr<CBaseChainParams> globalChainBaseParams;
  
  const CBaseChainParams& BaseParams()
  {
      assert(globalChainBaseParams);
      return *globalChainBaseParams;
  }
  
  /**
   * Port numbers for incoming Tor connections (8334, 18334, 38334, 18445) have
   * been chosen arbitrarily to keep ranges of used ports tight.
   */
  std::unique_ptr<CBaseChainParams> CreateBaseChainParams(const std::string& chain)
  {
      if (chain == CBaseChainParams::MAIN) {
          return MakeUnique<CBaseChainParams>("", 8332, 8334);
      } else if (chain == CBaseChainParams::TESTNET) {
          return MakeUnique<CBaseChainParams>("testnet3", 18332, 18334);
      } else if (chain == CBaseChainParams::SIGNET) {
          return MakeUnique<CBaseChainParams>("signet", 38332, 38334);
      } else if (chain == CBaseChainParams::REGTEST) {
          return MakeUnique<CBaseChainParams>("regtest", 18443, 18445);
      }
      throw std::runtime_error(strprintf("%s: Unknown chain %s.", __func__, chain));
  }
  
  void SelectBaseParams(const std::string& chain)
  {
      globalChainBaseParams = CreateBaseChainParams(chain);
      gArgs.SelectConfigNetwork(chain);
  }
  