text: // Copyright (c) 2010 Satoshi Nakamoto
  // Copyright (c) 2009-2018 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 <consensus/merkle.h>
  
  #include <tinyformat.h>
  #include <util.h>
  #include <utilstrencodings.h>
  
  #include <assert.h>
  
  #include <chainparamsseeds.h>
  
  static CBlock CreateGenesisBlock(const char* pszTimestamp, const CScript& genesisOutputScript, uint32_t nTime, uint32_t nNonce, uint32_t nBits, int32_t nVersion, const CAmount& genesisReward)
  {
      CMutableTransaction txNew;
      txNew.nVersion = 1;
      txNew.vin.resize(1);
      txNew.vout.resize(1);
      txNew.vin[0].scriptSig = CScript() << 486604799 << CScriptNum(4) << std::vector<unsigned char>((const unsigned char*)pszTimestamp, (const unsigned char*)pszTimestamp + strlen(pszTimestamp));
      txNew.vout[0].nValue = genesisReward;
      txNew.vout[0].scriptPubKey = genesisOutputScript;
  
      CBlock genesis;
      genesis.nTime    = nTime;
      genesis.nBits    = nBits;
      genesis.nNonce   = nNonce;
      genesis.nVersion = nVersion;
      genesis.vtx.push_back(MakeTransactionRef(std::move(txNew)));
      genesis.hashPrevBlock.SetNull();
      genesis.hashMerkleRoot = BlockMerkleRoot(genesis);
      return genesis;
  }
  
  /**
   * 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
   */
  static CBlock CreateGenesisBlock(uint32_t nTime, uint32_t nNonce, uint32_t nBits, int32_t nVersion, const CAmount& genesisReward)
  {
      const char* pszTimestamp = "Merel word 11";
      const CScript genesisOutputScript = CScript() << ParseHex("04a7a9fa8ca5c8976c7de145dab4ba82e9024d74824dfc8a7f550ebd4f25e2d399f3db246535461581be32fda7aefaf3cec925edc0bd2432b22d85e2fe7dc6b7b4") << OP_CHECKSIG;
      return CreateGenesisBlock(pszTimestamp, genesisOutputScript, nTime, nNonce, nBits, nVersion, genesisReward);
  }
  
  void CChainParams::UpdateVersionBitsParameters(Consensus::DeploymentPos d, int64_t nStartTime, int64_t nTimeout)
  {
      consensus.vDeployments[d].nStartTime = nStartTime;
      consensus.vDeployments[d].nTimeout = nTimeout;
  }
  
  /**
   * 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 = 840000;
          consensus.BIP16Height = 0; // 87afb798a3ad9378fcd56123c81fb31cfd9a8df4719b9774d71730c16315a092 - October 1, 2012
          consensus.BIP34Height = 0;
          consensus.BIP34Hash = uint256S("8288f3b2098aabc2ca2205fe87c1d9f7ae66f32bc7424ffe615b77ecf0b9912f");
          consensus.BIP65Height = 0; // bab3041e8977e0dc3eeff63fe707b92bde1dd449d8efafb248c27c8264cc311a
          consensus.BIP66Height = 0; // 7aceee012833fa8952f8835d8b1b3ae233cd6ab08fdb27a771d2bd7bdc491894
          consensus.powLimit = uint256S("00000fffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"); 
          consensus.nPowTargetTimespan = 3.5 * 24 * 60 * 60; // 3.5 days
          consensus.nPowTargetSpacing = 2.5 * 60;
          consensus.fPowAllowMinDifficultyBlocks = false;
          consensus.fPowNoRetargeting = false;
          consensus.nRuleChangeActivationThreshold = 6048; // 75% of 8064
          consensus.nMinerConfirmationWindow = 8064; // nPowTargetTimespan / nPowTargetSpacing * 4
          consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].bit = 28;
          consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nStartTime = Consensus::BIP9Deployment::ALWAYS_ACTIVE; // January 1, 2008
          consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT; // December 31, 2008
  
          // Deployment of BIP68, BIP112, and BIP113.
          consensus.vDeployments[Consensus::DEPLOYMENT_CSV].bit = 0;
          consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nStartTime = Consensus::BIP9Deployment::ALWAYS_ACTIVE; // January 28, 2017
          consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT; // January 31st, 2018
  
          // Deployment of SegWit (BIP141, BIP143, and BIP147)
          consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].bit = 1;
          consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nStartTime = Consensus::BIP9Deployment::ALWAYS_ACTIVE; // January 28, 2017
          consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT; // January 31st, 2018
  
          // The best chain should have at least this much work.
          consensus.nMinimumChainWork = uint256S("0x0000000000000000000000000000000000000000000000000000000000000080");
  
          // By default assume that the signatures in ancestors of this block are valid.
          consensus.defaultAssumeValid = uint256S("0xa601455787cb65ffc325dda4751a99cf01d1567799ec4b04f45bb05f9ef0cbde"); //1503191
  
          /**
           * 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] = 0xfb;
          pchMessageStart[1] = 0xc0;
          pchMessageStart[2] = 0xb6;
          pchMessageStart[3] = 0xdb;
          nDefaultPort = 80806;
          nPruneAfterHeight = 100000;
  
          genesis = CreateGenesisBlock(1564561371, 1693929, 0x1e0ffff0, 1, 50 * COIN);
          consensus.hashGenesisBlock = genesis.GetHash();
          assert(consensus.hashGenesisBlock == uint256S("0x8288f3b2098aabc2ca2205fe87c1d9f7ae66f32bc7424ffe615b77ecf0b9912f"));
          assert(genesis.hashMerkleRoot == uint256S("0x7ff20016c1f784cf39ebef1a20ce4e5eabb945f9f246c27e47211a102a752e98"));
  
          // Note that of those which support the service bits prefix, most only support a subset of
          // possible options.
          // This is fine at runtime as we'll fall back to using them as a oneshot if they don't support the
          // service bits we want, but we should get them updated to support all service bits wanted by any
          // release ASAP to avoid it where possible.
          //vSeeds.emplace_back("seed-a.merelcoin.loshan.co.uk");
          //vSeeds.emplace_back("dnsseed.thrasher.io");
          //vSeeds.emplace_back("dnsseed.merelcointools.com");
          //vSeeds.emplace_back("dnsseed.merelcoinpool.org");
          //vSeeds.emplace_back("dnsseed.koin-project.com");
  
          base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,20);
          base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,5);
          base58Prefixes[SCRIPT_ADDRESS2] = std::vector<unsigned char>(1,50);
          base58Prefixes[SECRET_KEY] =     std::vector<unsigned char>(1,176);
          base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x88, 0xB2, 0x1E};
          base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x88, 0xAD, 0xE4};
  
          bech32_hrp = "mcn";
  
          vFixedSeeds = std::vector<SeedSpec6>(pnSeed6_main, pnSeed6_main + ARRAYLEN(pnSeed6_main));
  
          fDefaultConsistencyChecks = false;
          fRequireStandard = true;
          fMineBlocksOnDemand = false;
  
          checkpointData = {
              {
  		{    41, uint256S("0xe5bd9ed39ef56a6ad74ea6a25b5bd0d52561c2b7b6b445b5417566dab3ddc655")},
  		    {	5893, uint256S("0x8ae92fedda832fafb0c49639a92a3061491a94a39cc831595fdb2109096c5192")},
              }
          };
  
          chainTxData = ChainTxData{
              // Data from rpc: getchaintxstats 4096 a601455787cb65ffc325dda4751a99cf01d1567799ec4b04f45bb05f9ef0cbde
              /* nTime    */ 1538637641,
              /* nTxCount */ 28086163,
              /* dTxRate  */ 0.334
          };
  
          /* disable fallback fee on mainnet */
          m_fallback_fee_enabled = false;
      }
  };
  
  /**
   * Testnet (v3)
   */
  class CTestNetParams : public CChainParams {
  public:
      CTestNetParams() {
          strNetworkID = "test";
          consensus.nSubsidyHalvingInterval = 840000;
          consensus.BIP16Height = 0; // always enforce P2SH BIP16 on testnet
          consensus.BIP34Height = 76;
          consensus.BIP34Hash = uint256S("8075c771ed8b495ffd943980a95f702ab34fce3c8c54e379548bda33cc8c0573");
          consensus.BIP65Height = 76; // 8075c771ed8b495ffd943980a95f702ab34fce3c8c54e379548bda33cc8c0573
          consensus.BIP66Height = 76; // 8075c771ed8b495ffd943980a95f702ab34fce3c8c54e379548bda33cc8c0573
          consensus.powLimit = uint256S("00000fffffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
          consensus.nPowTargetTimespan = 3.5 * 24 * 60 * 60; // 3.5 days
          consensus.nPowTargetSpacing = 2.5 * 60;
          consensus.fPowAllowMinDifficultyBlocks = true;
          consensus.fPowNoRetargeting = false;
          consensus.nRuleChangeActivationThreshold = 1512; // 75% for testchains
          consensus.nMinerConfirmationWindow = 2016; // nPowTargetTimespan / nPowTargetSpacing
          consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].bit = 28;
          consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nStartTime = Consensus::BIP9Deployment::ALWAYS_ACTIVE; // January 1, 2008
          consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT; // December 31, 2008
  
          // Deployment of BIP68, BIP112, and BIP113.
          consensus.vDeployments[Consensus::DEPLOYMENT_CSV].bit = 0;
          consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nStartTime = Consensus::BIP9Deployment::ALWAYS_ACTIVE; // January 1, 2017
          consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT; // January 31st, 2018
  
          // Deployment of SegWit (BIP141, BIP143, and BIP147)
          consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].bit = 1;
          consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nStartTime = Consensus::BIP9Deployment::ALWAYS_ACTIVE; // January 1, 2017
          consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT; // January 31st, 2018
  
          // The best chain should have at least this much work.
          consensus.nMinimumChainWork = uint256S("0x00000000000000000000000000000000000000000000000000203cafcb7de493");
  
          // By default assume that the signatures in ancestors of this block are valid.
          consensus.defaultAssumeValid = uint256S("0x438b7e1c86f58b4e62e8cf2d0f9f256e3dddaebc5d1cc568e633a38e0db6c025"); //787085
  
          pchMessageStart[0] = 0xfd;
          pchMessageStart[1] = 0xd2;
          pchMessageStart[2] = 0xc8;
          pchMessageStart[3] = 0xf1;
          nDefaultPort = 54322;
          nPruneAfterHeight = 1000;
  
          genesis = CreateGenesisBlock(1486949366, 257086, 0x1e0ffff0, 1, 50 * COIN);
          consensus.hashGenesisBlock = genesis.GetHash();
          assert(consensus.hashGenesisBlock == uint256S("0x83f92d595ba40ced6694871491fd93bbcb9af274100e6cd6d8fb3c6657146c89"));
          assert(genesis.hashMerkleRoot == uint256S("0x7ff20016c1f784cf39ebef1a20ce4e5eabb945f9f246c27e47211a102a752e98"));
  
          vFixedSeeds.clear();
          vSeeds.clear();
          // nodes with support for servicebits filtering should be at the top
          //vSeeds.emplace_back("testnet-seed.merelcointools.com");
          //vSeeds.emplace_back("seed-b.merelcoin.loshan.co.uk");
          //vSeeds.emplace_back("dnsseed-testnet.thrasher.io");
  
          base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,111);
          base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,196);
          base58Prefixes[SCRIPT_ADDRESS2] = std::vector<unsigned char>(1,58);
          base58Prefixes[SECRET_KEY] =     std::vector<unsigned char>(1,239);
          base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x35, 0x87, 0xCF};
          base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x35, 0x83, 0x94};
  
          bech32_hrp = "tmcn";
  
          vFixedSeeds = std::vector<SeedSpec6>(pnSeed6_test, pnSeed6_test + ARRAYLEN(pnSeed6_test));
  
          fDefaultConsistencyChecks = false;
          fRequireStandard = false;
          fMineBlocksOnDemand = false;
  
          checkpointData = (CCheckpointData) {
              {
                  {2056, uint256S("17748a31ba97afdc9a4f86837a39d287e3e7c7290a08a1d816c5969c78a83289")},
              }
          };
  
          chainTxData = ChainTxData{
              // Data from rpc: getchaintxstats 4096 438b7e1c86f58b4e62e8cf2d0f9f256e3dddaebc5d1cc568e633a38e0db6c025
              /* nTime    */ 1538637952,
              /* nTxCount */ 1845705,
              /* dTxRate  */ 1.907
          };
  
          /* enable fallback fee on testnet */
          m_fallback_fee_enabled = true;
      }
  };
  
  /**
   * Regression test
   */
  class CRegTestParams : public CChainParams {
  public:
      CRegTestParams() {
          strNetworkID = "regtest";
          consensus.nSubsidyHalvingInterval = 150;
          consensus.BIP16Height = 0; // always enforce P2SH BIP16 on regtest
          consensus.BIP34Height = 100000000; // BIP34 has not activated on regtest (far in the future so block v1 are not rejected in tests)
          consensus.BIP34Hash = uint256();
          consensus.BIP65Height = 1351; // BIP65 activated on regtest (Used in rpc activation tests)
          consensus.BIP66Height = 1251; // BIP66 activated on regtest (Used in rpc activation tests)
          consensus.powLimit = uint256S("7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
          consensus.nPowTargetTimespan = 3.5 * 24 * 60 * 60; // two weeks
          consensus.nPowTargetSpacing = 2.5 * 60;
          consensus.fPowAllowMinDifficultyBlocks = true;
          consensus.fPowNoRetargeting = true;
          consensus.nRuleChangeActivationThreshold = 108; // 75% for testchains
          consensus.nMinerConfirmationWindow = 144; // Faster than normal for regtest (144 instead of 2016)
          consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].bit = 28;
          consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nStartTime = 0;
          consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT;
          consensus.vDeployments[Consensus::DEPLOYMENT_CSV].bit = 0;
          consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nStartTime = 0;
          consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT;
          consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].bit = 1;
          consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nStartTime = Consensus::BIP9Deployment::ALWAYS_ACTIVE;
          consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nTimeout = Consensus::BIP9Deployment::NO_TIMEOUT;
  
          // The best chain should have at least this much work.
          consensus.nMinimumChainWork = uint256S("0x00");
  
          // By default assume that the signatures in ancestors of this block are valid.
          consensus.defaultAssumeValid = uint256S("0x00");
  
          pchMessageStart[0] = 0xfa;
          pchMessageStart[1] = 0xbf;
          pchMessageStart[2] = 0xb5;
          pchMessageStart[3] = 0xda;
          nDefaultPort = 19444;
          nPruneAfterHeight = 1000;
  
          genesis = CreateGenesisBlock(1296688602, 1, 0x207fffff, 1, 50 * COIN);
          consensus.hashGenesisBlock = genesis.GetHash();
          assert(consensus.hashGenesisBlock == uint256S("0xd31bec72d2dd531677b9a9f30185b2314f9f8b088b54d1e1435ca9dc615fa7ae"));
          assert(genesis.hashMerkleRoot == uint256S("0x7ff20016c1f784cf39ebef1a20ce4e5eabb945f9f246c27e47211a102a752e98"));
  
          vFixedSeeds.clear(); //!< Regtest mode doesn't have any fixed seeds.
          vSeeds.clear();      //!< Regtest mode doesn't have any DNS seeds.
  
          fDefaultConsistencyChecks = true;
          fRequireStandard = false;
          fMineBlocksOnDemand = true; 
  
          checkpointData = {
              {
                  {0, uint256S("530827f38f93b43ed12af0b3ad25a288dc02ed74d6d7857862df51fc56c416f9")},
              }
          };
  
          chainTxData = ChainTxData{
              0,
              0,
              0
          };
  
          base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,111);
          base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,196);
          base58Prefixes[SCRIPT_ADDRESS2] = std::vector<unsigned char>(1,58);
          base58Prefixes[SECRET_KEY] =     std::vector<unsigned char>(1,239);
          base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x35, 0x87, 0xCF};
          base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x35, 0x83, 0x94};
  
          bech32_hrp = "rmcn";
  
          /* enable fallback fee on regtest */
          m_fallback_fee_enabled = true;
      }
  };
  
  static std::unique_ptr<CChainParams> globalChainParams;
  
  const CChainParams &Params() {
      assert(globalChainParams);
      return *globalChainParams;
  }
  
  std::unique_ptr<CChainParams> CreateChainParams(const std::string& chain)
  {
      if (chain == CBaseChainParams::MAIN)
          return std::unique_ptr<CChainParams>(new CMainParams());
      else if (chain == CBaseChainParams::TESTNET)
          return std::unique_ptr<CChainParams>(new CTestNetParams());
      else if (chain == CBaseChainParams::REGTEST)
          return std::unique_ptr<CChainParams>(new CRegTestParams());
      throw std::runtime_error(strprintf("%s: Unknown chain %s.", __func__, chain));
  }
  
  void SelectParams(const std::string& network)
  {
      SelectBaseParams(network);
      globalChainParams = CreateChainParams(network);
  }
  
  void UpdateVersionBitsParameters(Consensus::DeploymentPos d, int64_t nStartTime, int64_t nTimeout)
  {
      globalChainParams->UpdateVersionBitsParameters(d, nStartTime, nTimeout);
  }
  