// Copyright (c) 2014-2020, The Monero Project
// 
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
// 
// 1. Redistributions of source code must retain the above copyright notice, this list of
//    conditions and the following disclaimer.
// 
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
//    of conditions and the following disclaimer in the documentation and/or other
//    materials provided with the distribution.
// 
// 3. Neither the name of the copyright holder nor the names of its contributors may be
//    used to endorse or promote products derived from this software without specific
//    prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// 
// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers

#pragma once

#include <stdexcept>
#include <string>
#include <boost/uuid/uuid.hpp>

#define CRYPTONOTE_DNS_TIMEOUT_MS                       20000

#define CRYPTONOTE_MAX_BLOCK_NUMBER                     500000000
#define CRYPTONOTE_MAX_TX_SIZE                          1000000
#define CRYPTONOTE_MAX_TX_PER_BLOCK                     0x10000000
#define CRYPTONOTE_PUBLIC_ADDRESS_TEXTBLOB_VER          0
#define CRYPTONOTE_MINED_MONEY_UNLOCK_WINDOW_V2         288
#define CRYPTONOTE_MINED_MONEY_UNLOCK_WINDOW            60
#define CURRENT_TRANSACTION_VERSION                     2
#define CURRENT_BLOCK_MAJOR_VERSION                     7
#define CURRENT_BLOCK_MINOR_VERSION                     7
#define BLOCK_HEADER_MINER_SIG                          18
#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

#define BLOCKCHAIN_TIMESTAMP_CHECK_WINDOW_V2            11
#define BLOCKCHAIN_TIMESTAMP_CHECK_WINDOW               60

// MONEY_SUPPLY - total number coins to be generated
#define MONEY_SUPPLY                                    ((uint64_t)(-1))
#define EMISSION_SPEED_FACTOR_PER_MINUTE                (24)
#define FINAL_SUBSIDY_PER_MINUTE                        ((uint64_t)(0))

#define CRYPTONOTE_REWARD_BLOCKS_WINDOW                 100
#define CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2    60000 //size of block (bytes) after which reward for block calculated using block size
#define CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V1    20000 //size of block (bytes) after which reward for block calculated using block size - before first fork
#define CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V5    300000 //size of block (bytes) after which reward for block calculated using block size - second change, from v5
#define CRYPTONOTE_LONG_TERM_BLOCK_WEIGHT_WINDOW_SIZE   100000 // size in blocks of the long term block weight median window
#define CRYPTONOTE_SHORT_TERM_BLOCK_WEIGHT_SURGE_FACTOR 50
#define CRYPTONOTE_COINBASE_BLOB_RESERVED_SIZE          600
#define CRYPTONOTE_DISPLAY_DECIMAL_POINT                11
// COIN - number of smallest units in one coin
#define COIN                                            ((uint64_t)100000000000) // pow(10, 11)

#define FEE_PER_KB_OLD                                  ((uint64_t)10000000000) // pow(10, 10)
#define FEE_PER_KB                                      ((uint64_t)2000000000) // 2 * pow(10, 9)
#define FEE_PER_BYTE                                    ((uint64_t)300000)
#define DYNAMIC_FEE_PER_KB_BASE_FEE                     ((uint64_t)2000000000) // 2 * pow(10,9)
#define DYNAMIC_FEE_PER_KB_BASE_BLOCK_REWARD            ((uint64_t)10000000000000) // 10 * pow(10,12)
#define DYNAMIC_FEE_PER_KB_BASE_FEE_V5                  ((uint64_t)2000000000 * (uint64_t)CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 / CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V5)
#define DYNAMIC_FEE_REFERENCE_TRANSACTION_WEIGHT         ((uint64_t)3000)

#define ORPHANED_BLOCKS_MAX_COUNT                       100


#define DIFFICULTY_TARGET_V2                            300
#define DIFFICULTY_TARGET_V1                            300
#define DIFFICULTY_WINDOW_V3                            144
#define DIFFICULTY_WINDOW_V2                            60
#define DIFFICULTY_WINDOW                               720 // blocks
#define DIFFICULTY_LAG                                  15  // !!!
#define DIFFICULTY_CUT                                  60  // timestamps to cut after sorting
#define DIFFICULTY_BLOCKS_COUNT_V3                      DIFFICULTY_WINDOW_V3 + 1 // added +1 to make N=N
#define DIFFICULTY_BLOCKS_COUNT_V2                      DIFFICULTY_WINDOW_V2 + 1 // added +1 to make N=N
#define DIFFICULTY_BLOCKS_COUNT                         DIFFICULTY_WINDOW + DIFFICULTY_LAG
#define DIFFICULTY_RESET_HEIGHT                         331170// ~July 4, 2021 Pool Independence Day
#define DIFFICULTY_RESET_LEVEL                          100000000 // 100 mill


#define CRYPTONOTE_LOCKED_TX_ALLOWED_DELTA_SECONDS_V1   DIFFICULTY_TARGET_V1 * CRYPTONOTE_LOCKED_TX_ALLOWED_DELTA_BLOCKS
#define CRYPTONOTE_LOCKED_TX_ALLOWED_DELTA_SECONDS_V2   DIFFICULTY_TARGET_V2 * CRYPTONOTE_LOCKED_TX_ALLOWED_DELTA_BLOCKS
#define CRYPTONOTE_LOCKED_TX_ALLOWED_DELTA_BLOCKS       1


#define DIFFICULTY_BLOCKS_ESTIMATE_TIMESPAN             DIFFICULTY_TARGET_V1 //just alias; used by tests


#define BLOCKS_IDS_SYNCHRONIZING_DEFAULT_COUNT          10000  //by default, blocks ids count in synchronizing
#define BLOCKS_IDS_SYNCHRONIZING_MAX_COUNT              25000  //max blocks ids count in synchronizing
#define BLOCKS_SYNCHRONIZING_DEFAULT_COUNT_PRE_V4       100    //by default, blocks count in blocks downloading
#define BLOCKS_SYNCHRONIZING_DEFAULT_COUNT              20     //by default, blocks count in blocks downloading
#define BLOCKS_SYNCHRONIZING_MAX_COUNT                  2048   //must be a power of 2, greater than 128, equal to SEEDHASH_EPOCH_BLOCKS

#define CRYPTONOTE_MEMPOOL_TX_LIVETIME                    (86400*3) //seconds, three days
#define CRYPTONOTE_MEMPOOL_TX_FROM_ALT_BLOCK_LIVETIME     604800 //seconds, one week


#define CRYPTONOTE_DANDELIONPP_STEMS              2 // number of outgoing stem connections per epoch
#define CRYPTONOTE_DANDELIONPP_FLUFF_PROBABILITY 20 // out of 100
#define CRYPTONOTE_DANDELIONPP_MIN_EPOCH         10 // minutes
#define CRYPTONOTE_DANDELIONPP_EPOCH_RANGE       30 // seconds
#define CRYPTONOTE_DANDELIONPP_FLUSH_AVERAGE      5 // seconds average for poisson distributed fluff flush
#define CRYPTONOTE_DANDELIONPP_EMBARGO_AVERAGE   39 // seconds (see tx_pool.cpp for more info)

// see src/cryptonote_protocol/levin_notify.cpp
#define CRYPTONOTE_NOISE_MIN_EPOCH                      5      // minutes
#define CRYPTONOTE_NOISE_EPOCH_RANGE                    30     // seconds
#define CRYPTONOTE_NOISE_MIN_DELAY                      10     // seconds
#define CRYPTONOTE_NOISE_DELAY_RANGE                    5      // seconds
#define CRYPTONOTE_NOISE_BYTES                          3*1024 // 3 KiB
#define CRYPTONOTE_NOISE_CHANNELS                       2      // Max outgoing connections per zone used for noise/covert sending

// Both below are in seconds. The idea is to delay forwarding from i2p/tor
// to ipv4/6, such that 2+ incoming connections _could_ have sent the tx
#define CRYPTONOTE_FORWARD_DELAY_BASE (CRYPTONOTE_NOISE_MIN_DELAY + CRYPTONOTE_NOISE_DELAY_RANGE)
#define CRYPTONOTE_FORWARD_DELAY_AVERAGE (CRYPTONOTE_FORWARD_DELAY_BASE + (CRYPTONOTE_FORWARD_DELAY_BASE / 2))

#define CRYPTONOTE_MAX_FRAGMENTS                        20 // ~20 * NOISE_BYTES max payload size for covert/noise send

#define COMMAND_RPC_GET_BLOCKS_FAST_MAX_BLOCK_COUNT     1000
#define COMMAND_RPC_GET_BLOCKS_FAST_MAX_TX_COUNT        20000

#define P2P_LOCAL_WHITE_PEERLIST_LIMIT                  1000
#define P2P_LOCAL_GRAY_PEERLIST_LIMIT                   5000

#define P2P_DEFAULT_CONNECTIONS_COUNT                   12
#define P2P_DEFAULT_HANDSHAKE_INTERVAL                  60           //secondes
#define P2P_DEFAULT_PACKET_MAX_SIZE                     50000000     //50000000 bytes maximum packet size
#define P2P_DEFAULT_PEERS_IN_HANDSHAKE                  250
#define P2P_MAX_PEERS_IN_HANDSHAKE                      250
#define P2P_DEFAULT_CONNECTION_TIMEOUT                  5000       //5 seconds
#define P2P_DEFAULT_SOCKS_CONNECT_TIMEOUT               45         // seconds
#define P2P_DEFAULT_PING_CONNECTION_TIMEOUT             2000       //2 seconds
#define P2P_DEFAULT_INVOKE_TIMEOUT                      60*2*1000  //2 minutes
#define P2P_DEFAULT_HANDSHAKE_INVOKE_TIMEOUT            5000       //5 seconds
#define P2P_DEFAULT_WHITELIST_CONNECTIONS_PERCENT       70
#define P2P_DEFAULT_ANCHOR_CONNECTIONS_COUNT            2
#define P2P_DEFAULT_SYNC_SEARCH_CONNECTIONS_COUNT       2
#define P2P_DEFAULT_LIMIT_RATE_UP                       2048       // kB/s
#define P2P_DEFAULT_LIMIT_RATE_DOWN                     8192       // kB/s

#define P2P_FAILED_ADDR_FORGET_SECONDS                  (60*60)     //1 hour
#define P2P_IP_BLOCKTIME                                (60*60*24)  //24 hour
#define P2P_IP_FAILS_BEFORE_BLOCK                       10
#define P2P_IDLE_CONNECTION_KILL_INTERVAL               (5*60) //5 minutes

#define P2P_SUPPORT_FLAG_FLUFFY_BLOCKS                  0x01
#define P2P_SUPPORT_FLAGS                               P2P_SUPPORT_FLAG_FLUFFY_BLOCKS

#define RPC_IP_FAILS_BEFORE_BLOCK                       3

#define CRYPTONOTE_NAME                         "wownero"
#define CRYPTONOTE_BLOCKCHAINDATA_FILENAME      "data.mdb"
#define CRYPTONOTE_BLOCKCHAINDATA_LOCK_FILENAME "lock.mdb"
#define P2P_NET_DATA_FILENAME                   "p2pstate.bin"
#define RPC_PAYMENTS_DATA_FILENAME              "rpcpayments.bin"
#define MINER_CONFIG_FILE_NAME                  "miner_conf.json"

#define THREAD_STACK_SIZE                       5 * 1024 * 1024

#define HF_VERSION_DYNAMIC_FEE                  4
#define HF_VERSION_MIN_MIXIN_4                  6
#define HF_VERSION_MIN_MIXIN_7                  7
#define HF_VERSION_MIN_MIXIN_21                 9
#define HF_VERSION_ENFORCE_RCT                  6
#define HF_VERSION_PER_BYTE_FEE                 12
#define HF_VERSION_SMALLER_BP                   13
#define HF_VERSION_LONG_TERM_BLOCK_WEIGHT       13
#define HF_VERSION_MIN_2_OUTPUTS                15
#define HF_VERSION_MIN_V2_COINBASE_TX           15
#define HF_VERSION_SAME_MIXIN                   15
#define HF_VERSION_REJECT_SIGS_IN_COINBASE      15
#define HF_VERSION_ENFORCE_MIN_AGE              15
#define HF_VERSION_EFFECTIVE_SHORT_TERM_MEDIAN_IN_PENALTY 15
#define HF_VERSION_EXACT_COINBASE               16
#define HF_VERSION_CLSAG                        16
#define HF_VERSION_DETERMINISTIC_UNLOCK_TIME    16
#define HF_VERSION_DYNAMIC_UNLOCK               16
#define HF_VERSION_FIXED_UNLOCK                 18

#define PER_KB_FEE_QUANTIZATION_DECIMALS        8

#define HASH_OF_HASHES_STEP                     512

#define DEFAULT_TXPOOL_MAX_WEIGHT               648000000ull // 3 days at 300000, in bytes

#define BULLETPROOF_MAX_OUTPUTS                 16

#define CRYPTONOTE_PRUNING_STRIPE_SIZE          4096 // the smaller, the smoother the increase
#define CRYPTONOTE_PRUNING_LOG_STRIPES          3 // the higher, the more space saved
#define CRYPTONOTE_PRUNING_TIP_BLOCKS           5500 // the smaller, the more space saved
//#define CRYPTONOTE_PRUNING_DEBUG_SPOOF_SEED

#define RPC_CREDITS_PER_HASH_SCALE ((float)(1<<24))

#define DNS_BLOCKLIST_LIFETIME (86400 * 8)

// New constants are intended to go here
namespace config
{
  uint64_t const DEFAULT_FEE_ATOMIC_XMR_PER_KB = 500; // Just a placeholder!  Change me!
  uint8_t const FEE_CALCULATION_MAX_RETRIES = 10;
  uint64_t const DEFAULT_DUST_THRESHOLD = ((uint64_t)2000000000); // 2 * pow(10, 9)
  uint64_t const BASE_REWARD_CLAMP_THRESHOLD = ((uint64_t)100000000); // pow(10, 8)

  uint64_t const CRYPTONOTE_PUBLIC_ADDRESS_BASE58_PREFIX = 4146;
  uint64_t const CRYPTONOTE_PUBLIC_INTEGRATED_ADDRESS_BASE58_PREFIX = 6810;
  uint64_t const CRYPTONOTE_PUBLIC_SUBADDRESS_BASE58_PREFIX = 12208;
  uint16_t const P2P_DEFAULT_PORT = 34567;
  uint16_t const RPC_DEFAULT_PORT = 34568;
  uint16_t const ZMQ_RPC_DEFAULT_PORT = 34569;
  boost::uuids::uuid const NETWORK_ID = { {
      0x11, 0x33, 0xFF, 0x77 , 0x61, 0x04 , 0x41, 0x61, 0x17, 0x31, 0x00, 0x82, 0x16, 0xA1, 0xA1, 0x10
    } }; // Bender's nightmare
  std::string const GENESIS_TX = "013c01ff0001ffffffffff1f029b2e4c0281c0b02e7c53291a94d1d0cbff8883f8024f5142ee494ffbbd08807121012a1a936be5d91c01ee876e38c13fab0ee11cbe86011a2bf7740fb5ebd39d267d";
  uint32_t const GENESIS_NONCE = 70;

  // Hash domain separators
  const char HASH_KEY_BULLETPROOF_EXPONENT[] = "bulletproof";
  const char HASH_KEY_BULLETPROOF_PLUS_EXPONENT[] = "bulletproof_plus";
  const char HASH_KEY_BULLETPROOF_PLUS_TRANSCRIPT[] = "bulletproof_plus_transcript";
  const char HASH_KEY_RINGDB[] = "ringdsb";
  const char HASH_KEY_SUBADDRESS[] = "SubAddr";
  const unsigned char HASH_KEY_ENCRYPTED_PAYMENT_ID = 0x8d;
  const unsigned char HASH_KEY_WALLET = 0x8c;
  const unsigned char HASH_KEY_WALLET_CACHE = 0x8d;
  const unsigned char HASH_KEY_RPC_PAYMENT_NONCE = 0x58;
  const unsigned char HASH_KEY_MEMORY = 'k';
  const unsigned char HASH_KEY_MULTISIG[] = {'M', 'u', 'l', 't' , 'i', 's', 'i', 'g', 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
  const unsigned char HASH_KEY_TXPROOF_V2[] = "TXPROOF_V2";
  const unsigned char HASH_KEY_CLSAG_ROUND[] = "CLSAG_round";
  const unsigned char HASH_KEY_CLSAG_AGG_0[] = "CLSAG_agg_0";
  const unsigned char HASH_KEY_CLSAG_AGG_1[] = "CLSAG_agg_1";
  const char HASH_KEY_MESSAGE_SIGNING[] = "MoneroMessageSignature";

  namespace testnet
  {
    uint64_t const CRYPTONOTE_PUBLIC_ADDRESS_BASE58_PREFIX = 53;
    uint64_t const CRYPTONOTE_PUBLIC_INTEGRATED_ADDRESS_BASE58_PREFIX = 54;
    uint64_t const CRYPTONOTE_PUBLIC_SUBADDRESS_BASE58_PREFIX = 63;
    uint16_t const P2P_DEFAULT_PORT = 11180;
    uint16_t const RPC_DEFAULT_PORT = 11181;
    uint16_t const ZMQ_RPC_DEFAULT_PORT = 11182;
    boost::uuids::uuid const NETWORK_ID = { {
        0x11, 0x33, 0xFF, 0x77 , 0x61, 0x04 , 0x41, 0x61, 0x17, 0x31, 0x00, 0x82, 0x16, 0xA1, 0xA1, 0x11
      } }; // Bender's daydream
    std::string const GENESIS_TX = "013c01ff0001ffffffffff1f029b2e4c0281c0b02e7c53291a94d1d0cbff8883f8024f5142ee494ffbbd088071210160eb755f618a2336055dee60f307fe0ded81c5b37b53d310175ca9ee69b0c8ad";
    uint32_t const GENESIS_NONCE = 70;
  }

  namespace stagenet
  {
    uint64_t const CRYPTONOTE_PUBLIC_ADDRESS_BASE58_PREFIX = 24;
    uint64_t const CRYPTONOTE_PUBLIC_INTEGRATED_ADDRESS_BASE58_PREFIX = 25;
    uint64_t const CRYPTONOTE_PUBLIC_SUBADDRESS_BASE58_PREFIX = 36;
    uint16_t const P2P_DEFAULT_PORT = 38080;
    uint16_t const RPC_DEFAULT_PORT = 38081;
    uint16_t const ZMQ_RPC_DEFAULT_PORT = 38082;
    boost::uuids::uuid const NETWORK_ID = { {
        0x12 ,0x30, 0xF1, 0x71 , 0x61, 0x04 , 0x41, 0x61, 0x17, 0x31, 0x00, 0x82, 0x16, 0xA1, 0xA1, 0x12
      } }; // Bender's daydream
    std::string const GENESIS_TX = "013c01ff0001ffffffffffff0302df5d56da0c7d643ddd1ce61901c7bdc5fb1738bfe39fbe69c28a3a7032729c0f2101168d0c4ca86fb55a4cf6a36d31431be1c53a3bd7411bb24e8832410289fa6f3b";
    uint32_t const GENESIS_NONCE = 10002;
  }
}

namespace cryptonote
{
  enum network_type : uint8_t
  {
    MAINNET = 0,
    TESTNET,
    STAGENET,
    FAKECHAIN,
    UNDEFINED = 255
  };
  struct config_t
  {
    uint64_t const CRYPTONOTE_PUBLIC_ADDRESS_BASE58_PREFIX;
    uint64_t const CRYPTONOTE_PUBLIC_INTEGRATED_ADDRESS_BASE58_PREFIX;
    uint64_t const CRYPTONOTE_PUBLIC_SUBADDRESS_BASE58_PREFIX;
    uint16_t const P2P_DEFAULT_PORT;
    uint16_t const RPC_DEFAULT_PORT;
    uint16_t const ZMQ_RPC_DEFAULT_PORT;
    boost::uuids::uuid const NETWORK_ID;
    std::string const GENESIS_TX;
    uint32_t const GENESIS_NONCE;
  };
  inline const config_t& get_config(network_type nettype)
  {
    static const config_t mainnet = {
      ::config::CRYPTONOTE_PUBLIC_ADDRESS_BASE58_PREFIX,
      ::config::CRYPTONOTE_PUBLIC_INTEGRATED_ADDRESS_BASE58_PREFIX,
      ::config::CRYPTONOTE_PUBLIC_SUBADDRESS_BASE58_PREFIX,
      ::config::P2P_DEFAULT_PORT,
      ::config::RPC_DEFAULT_PORT,
      ::config::ZMQ_RPC_DEFAULT_PORT,
      ::config::NETWORK_ID,
      ::config::GENESIS_TX,
      ::config::GENESIS_NONCE
    };
    static const config_t testnet = {
      ::config::testnet::CRYPTONOTE_PUBLIC_ADDRESS_BASE58_PREFIX,
      ::config::testnet::CRYPTONOTE_PUBLIC_INTEGRATED_ADDRESS_BASE58_PREFIX,
      ::config::testnet::CRYPTONOTE_PUBLIC_SUBADDRESS_BASE58_PREFIX,
      ::config::testnet::P2P_DEFAULT_PORT,
      ::config::testnet::RPC_DEFAULT_PORT,
      ::config::testnet::ZMQ_RPC_DEFAULT_PORT,
      ::config::testnet::NETWORK_ID,
      ::config::testnet::GENESIS_TX,
      ::config::testnet::GENESIS_NONCE
    };
    static const config_t stagenet = {
      ::config::stagenet::CRYPTONOTE_PUBLIC_ADDRESS_BASE58_PREFIX,
      ::config::stagenet::CRYPTONOTE_PUBLIC_INTEGRATED_ADDRESS_BASE58_PREFIX,
      ::config::stagenet::CRYPTONOTE_PUBLIC_SUBADDRESS_BASE58_PREFIX,
      ::config::stagenet::P2P_DEFAULT_PORT,
      ::config::stagenet::RPC_DEFAULT_PORT,
      ::config::stagenet::ZMQ_RPC_DEFAULT_PORT,
      ::config::stagenet::NETWORK_ID,
      ::config::stagenet::GENESIS_TX,
      ::config::stagenet::GENESIS_NONCE
    };
    switch (nettype)
    {
      case MAINNET: return mainnet;
      case TESTNET: return testnet;
      case STAGENET: return stagenet;
      case FAKECHAIN: return mainnet;
      default: throw std::runtime_error("Invalid network type");
    }
  };
}