text: // Copyright (c) 2010 Satoshi Nakamoto
  // Copyright (c) 2009-2014 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 "chainparams.h"
  
  #include "util.h"
  #include "utilstrencodings.h"
  
  #include <assert.h>
  
  #include <boost/assign/list_of.hpp>
  
  using namespace std;
  
  #include "chainparamsseeds.h"
  
  /**
   * Main network
   */
  /**
   * What makes a good checkpoint block?
   * + Is surrounded by blocks with reasonable timestamps
   *   (no blocks before with a timestamp after, none after with
   *    timestamp before)
   * + Contains no strange transactions
   */
  
  class CMainParams : public CChainParams {
  public:
      CMainParams() {
          strNetworkID = "main";
          consensus.nSubsidyHalvingInterval = 210000;
          consensus.nMajorityEnforceBlockUpgrade = 750;
          consensus.nMajorityRejectBlockOutdated = 950;
          consensus.nMajorityWindow = 1000;
          consensus.powLimit = uint256S("00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
          consensus.nPowTargetTimespan = 14 * 24 * 60 * 60; // two weeks
          consensus.nPowTargetSpacing = 10 * 60;
          consensus.fPowAllowMinDifficultyBlocks = false;
          /** 
           * The message start string is designed to be unlikely to occur in normal data.
           * The characters are rarely used upper ASCII, not valid as UTF-8, and produce
           * a large 32-bit integer with any alignment.
           */
          pchMessageStart[0] = 0xf9;
          pchMessageStart[1] = 0xbe;
          pchMessageStart[2] = 0xb4;
          pchMessageStart[3] = 0xd9;
          vAlertPubKey = ParseHex("04fc9702847840aaf195de8442ebecedf5b095cdbb9bc716bda9110971b28a49e0ead8564ff0db22209e0374782c093bb899692d524e9d6a6956e7c5ecbcd68284");
          nDefaultPort = 8333;
          nMinerThreads = 0;
          nPruneAfterHeight = 100000;
  
          // Timestamps for forking consensus rule changes:
          //  Allow bigger blocks
          consensus.nEarliestSizeForkTime = 1452470400; // 11 Jan 2016 00:00:00 UTC
          // 1MB max blocks before 11 Jan 2016
          // Then, if miner consensus: 8MB max, doubling every two years
          consensus.nMaxSizePreFork = 1000*1000; // 1MB max pre-fork
          consensus.nSizeDoubleEpoch = 60*60*24*365*2; // two years
          consensus.nMaxSizeBase = 2828427; // 2 * sqrt(2) MB
          consensus.nMaxSizeDoublings = 10;
          consensus.nActivateSizeForkMajority = 100; // 100% of hashpower to activate fork
          consensus.nSizeForkGracePeriod = 365*60*60*24; // one year grace period after activation
  
          /**
           * Build the genesis block. Note that the output of its generation
           * transaction cannot be spent since it did not originally exist in the
           * database.
           *
           * CBlock(hash=000000000019d6, ver=1, hashPrevBlock=00000000000000, hashMerkleRoot=4a5e1e, nTime=1231006505, nBits=1d00ffff, nNonce=2083236893, vtx=1)
           *   CTransaction(hash=4a5e1e, ver=1, vin.size=1, vout.size=1, nLockTime=0)
           *     CTxIn(COutPoint(000000, -1), coinbase 04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73)
           *     CTxOut(nValue=50.00000000, scriptPubKey=0x5F1DF16B2B704C8A578D0B)
           *   vMerkleTree: 4a5e1e
           */
          const char* pszTimestamp = "The Times 03/Jan/2009 Chancellor on brink of second bailout for banks";
          CMutableTransaction txNew;
          txNew.vin.resize(1);
          txNew.vout.resize(1);
          txNew.vin[0].scriptSig = CScript() << 486604799 << CScriptNum(4) << vector<unsigned char>((const unsigned char*)pszTimestamp, (const unsigned char*)pszTimestamp + strlen(pszTimestamp));
          txNew.vout[0].nValue = 50 * COIN;
          txNew.vout[0].scriptPubKey = CScript() << ParseHex("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f") << OP_CHECKSIG;
          genesis.vtx.push_back(txNew);
          genesis.hashPrevBlock.SetNull();
          genesis.hashMerkleRoot = genesis.BuildMerkleTree();
          genesis.nVersion = 1;
          genesis.nTime    = 1231006505;
          genesis.nBits    = 0x1d00ffff;
          genesis.nNonce   = 2083236893;
  
          consensus.hashGenesisBlock = genesis.GetHash();
          assert(consensus.hashGenesisBlock == uint256S("0x000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f"));
          assert(genesis.hashMerkleRoot == uint256S("0x4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"));
  
          vSeeds.push_back(CDNSSeedData("bitcoin.sipa.be", "seed.bitcoin.sipa.be"));    // Pieter Wiulle
          vSeeds.push_back(CDNSSeedData("bluematt.me", "dnsseed.bluematt.me"));         // Matt Corallo
          vSeeds.push_back(CDNSSeedData("dashjr.org", "dnsseed.bitcoin.dashjr.org"));   // Luke Dashjr
          vSeeds.push_back(CDNSSeedData("bitcoinstats.com", "seed.bitcoinstats.com"));  // Christian Decker
          vSeeds.push_back(CDNSSeedData("bitnodes.io", "seed.bitnodes.io"));            // Addy Yeow
          vSeeds.push_back(CDNSSeedData("vinumeris.com", "dnsseed.vinumeris.com"));     // Mike Hearn
          vSeeds.push_back(CDNSSeedData("bitcoin.jonasschnelli.ch", "seed.bitcoin.jonasschnelli.ch")); // Jonas Schnelli
  
          base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,0);
          base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,5);
          base58Prefixes[SECRET_KEY] =     std::vector<unsigned char>(1,128);
          base58Prefixes[EXT_PUBLIC_KEY] = boost::assign::list_of(0x04)(0x88)(0xB2)(0x1E).convert_to_container<std::vector<unsigned char> >();
          base58Prefixes[EXT_SECRET_KEY] = boost::assign::list_of(0x04)(0x88)(0xAD)(0xE4).convert_to_container<std::vector<unsigned char> >();
  
          vFixedSeeds = std::vector<SeedSpec6>(pnSeed6_main, pnSeed6_main + ARRAYLEN(pnSeed6_main));
  
          fRequireRPCPassword = true;
          fMiningRequiresPeers = true;
          fDefaultConsistencyChecks = false;
          fRequireStandard = true;
          fMineBlocksOnDemand = false;
          fTestnetToBeDeprecatedFieldRPC = false;
  
          checkpointData = (Checkpoints::CCheckpointData) {
              boost::assign::map_list_of
              ( 11111, uint256S("0x0000000069e244f73d78e8fd29ba2fd2ed618bd6fa2ee92559f542fdb26e7c1d"))
              ( 33333, uint256S("0x000000002dd5588a74784eaa7ab0507a18ad16a236e7b1ce69f00d7ddfb5d0a6"))
              ( 74000, uint256S("0x0000000000573993a3c9e41ce34471c079dcf5f52a0e824a81e7f953b8661a20"))
              (105000, uint256S("0x00000000000291ce28027faea320c8d2b054b2e0fe44a773f3eefb151d6bdc97"))
              (134444, uint256S("0x00000000000005b12ffd4cd315cd34ffd4a594f430ac814c91184a0d42d2b0fe"))
              (168000, uint256S("0x000000000000099e61ea72015e79632f216fe6cb33d7899acb35b75c8303b763"))
              (193000, uint256S("0x000000000000059f452a5f7340de6682a977387c17010ff6e6c3bd83ca8b1317"))
              (210000, uint256S("0x000000000000048b95347e83192f69cf0366076336c639f9b7228e9ba171342e"))
              (216116, uint256S("0x00000000000001b4f4b433e81ee46494af945cf96014816a4e2370f11b23df4e"))
              (225430, uint256S("0x00000000000001c108384350f74090433e7fcf79a606b8e797f065b130575932"))
              (250000, uint256S("0x000000000000003887df1f29024b06fc2200b55f8af8f35453d7be294df2d214"))
              (279000, uint256S("0x0000000000000001ae8c72a0b0c301f67e3afca10e819efa9041e458e9bd7e40"))
              (295000, uint256S("0x00000000000000004d9b4ef50f0f9d686fd69db2e03af35a100370c64632a983")),
              1397080064, // * UNIX timestamp of last checkpoint block
              36544669,   // * total number of transactions between genesis and last checkpoint
                          //   (the tx=... number in the SetBestChain debug.log lines)
              60000.0     // * estimated number of transactions per day after checkpoint
          };
      }
  };
  static CMainParams mainParams;
  
  /**
   * Testnet (v3)
   */
  class CTestNetParams : public CMainParams {
  public:
      CTestNetParams() {
          strNetworkID = "test";
          consensus.nMajorityEnforceBlockUpgrade = 51;
          consensus.nMajorityRejectBlockOutdated = 75;
          consensus.nMajorityWindow = 100;
          consensus.fPowAllowMinDifficultyBlocks = true;
          pchMessageStart[0] = 0x0b;
          pchMessageStart[1] = 0x11;
          pchMessageStart[2] = 0x09;
          pchMessageStart[3] = 0x07;
          vAlertPubKey = ParseHex("04302390343f91cc401d56d68b123028bf52e5fca1939df127f63c6467cdf9c8e2c14b61104cf817d0b780da337893ecc4aaff1309e536162dabbdb45200ca2b0a");
          nDefaultPort = 18333;
          nMinerThreads = 0;
          nPruneAfterHeight = 1000;
  
          // 1MB max blocks before 1 Aug 2015
          consensus.nMaxSizePreFork = 1000*1000; // 1MB max pre-fork
          consensus.nEarliestSizeForkTime = 1438387200; // 1 Aug 2015 00:00:00 UTC
          consensus.nSizeDoubleEpoch = 60*60*24*365*2; // two years
          consensus.nMaxSizeBase = 2828427; // 2 sqrt(2) MB
          consensus.nMaxSizeDoublings = 10;
          consensus.nActivateSizeForkMajority = 100; // 100 of 100 to activate fork
          consensus.nSizeForkGracePeriod = 60*60*24; // 1-day grace period
  
          //! Modify the testnet genesis block so the timestamp is valid for a later start.
          genesis.nTime = 1296688602;
          genesis.nNonce = 414098458;
          consensus.hashGenesisBlock = genesis.GetHash();
          assert(consensus.hashGenesisBlock == uint256S("0x000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943"));
  
          vFixedSeeds.clear();
          vSeeds.clear();
          vSeeds.push_back(CDNSSeedData("alexykot.me", "testnet-seed.alexykot.me"));
          vSeeds.push_back(CDNSSeedData("bitcoin.petertodd.org", "testnet-seed.bitcoin.petertodd.org"));
          vSeeds.push_back(CDNSSeedData("bluematt.me", "testnet-seed.bluematt.me"));
          vSeeds.push_back(CDNSSeedData("bitcoin.schildbach.de", "testnet-seed.bitcoin.schildbach.de"));
  
          base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,111);
          base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,196);
          base58Prefixes[SECRET_KEY] =     std::vector<unsigned char>(1,239);
          base58Prefixes[EXT_PUBLIC_KEY] = boost::assign::list_of(0x04)(0x35)(0x87)(0xCF).convert_to_container<std::vector<unsigned char> >();
          base58Prefixes[EXT_SECRET_KEY] = boost::assign::list_of(0x04)(0x35)(0x83)(0x94).convert_to_container<std::vector<unsigned char> >();
  
          vFixedSeeds = std::vector<SeedSpec6>(pnSeed6_test, pnSeed6_test + ARRAYLEN(pnSeed6_test));
  
          fRequireRPCPassword = true;
          fMiningRequiresPeers = true;
          fDefaultConsistencyChecks = false;
          fRequireStandard = false;
          fMineBlocksOnDemand = false;
          fTestnetToBeDeprecatedFieldRPC = true;
  
          checkpointData = (Checkpoints::CCheckpointData) {
              boost::assign::map_list_of
              ( 546, uint256S("000000002a936ca763904c3c35fce2f3556c559c0214345d31b1bcebf76acb70")),
              1337966069,
              1488,
              300
          };
  
      }
  };
  static CTestNetParams testNetParams;
  
  /**
   * Regression test
   */
  class CRegTestParams : public CTestNetParams {
  public:
      CRegTestParams() {
          strNetworkID = "regtest";
          consensus.nSubsidyHalvingInterval = 150;
          // Make forks on regtest the same as mainnet but 10x easier, to speed up the regression tests.
          consensus.nMajorityEnforceBlockUpgrade = 75;
          consensus.nMajorityRejectBlockOutdated = 95;
          consensus.nMajorityWindow = 100;
          consensus.powLimit = uint256S("7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
          pchMessageStart[0] = 0xfa;
          pchMessageStart[1] = 0xbf;
          pchMessageStart[2] = 0xb5;
          pchMessageStart[3] = 0xda;
          nMinerThreads = 1;
          genesis.nTime = 1296688602;
          genesis.nBits = 0x207fffff;
          genesis.nNonce = 2;
          consensus.hashGenesisBlock = genesis.GetHash();
          nDefaultPort = 18444;
          assert(consensus.hashGenesisBlock == uint256S("0x0f9188f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e2206"));
          nPruneAfterHeight = 1000;
  
          vFixedSeeds.clear(); //! Regtest mode doesn't have any fixed seeds.
          vSeeds.clear();  //! Regtest mode doesn't have any DNS seeds.
  
          fRequireRPCPassword = false;
          fMiningRequiresPeers = false;
          fDefaultConsistencyChecks = true;
          fRequireStandard = false;
          fMineBlocksOnDemand = true;
          fTestnetToBeDeprecatedFieldRPC = false;
  
          checkpointData = (Checkpoints::CCheckpointData){
              boost::assign::map_list_of
              ( 0, uint256S("0f9188f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e2206")),
              0,
              0,
              0
          };
      }
  };
  static CRegTestParams regTestParams;
  
  static CChainParams *pCurrentParams = 0;
  
  const CChainParams &Params() {
      assert(pCurrentParams);
      return *pCurrentParams;
  }
  
  CChainParams &Params(CBaseChainParams::Network network) {
      switch (network) {
          case CBaseChainParams::MAIN:
              return mainParams;
          case CBaseChainParams::TESTNET:
              return testNetParams;
          case CBaseChainParams::REGTEST:
              return regTestParams;
          default:
              assert(false && "Unimplemented network");
              return mainParams;
      }
  }
  
  void SelectParams(CBaseChainParams::Network network) {
      SelectBaseParams(network);
      pCurrentParams = &Params(network);
  }
  
  bool SelectParamsFromCommandLine()
  {
      CBaseChainParams::Network network = NetworkIdFromCommandLine();
      if (network == CBaseChainParams::MAX_NETWORK_TYPES)
          return false;
  
      SelectParams(network);
      return true;
  }
  