text: // Copyright (c) 2010 Satoshi Nakamoto
  // Copyright (c) 2009-2015 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 <boost/assign/list_of.hpp>
  
  #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 = "Judge orders arrest of ex-Brazil president Lula da Silva";
      const CScript genesisOutputScript = CScript() << ParseHex("04EA14A359ACFDD21D0C95A0F7334DEA41DB4A00C7BE2D3FC65216B8FCFAA75A22DCA074441DFFAC8D518EB5A6FFFA7D77F821E1EFA73338CECB3FDA1C09DAB0D8") << OP_CHECKSIG;
      return CreateGenesisBlock(pszTimestamp, genesisOutputScript, nTime, nNonce, nBits, nVersion, genesisReward);
  }
  
  /**
   * 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.BIP34Height = 0;
          consensus.BIP34Hash = uint256S("fa09d204a83a768ed5a7c8d441fa62f2043abf420cff1226c7b4329aeb9d51cf");
          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 = 1199145601; // January 1, 2008
          consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = 1230767999; // December 31, 2008
  
          // Deployment of BIP68, BIP112, and BIP113.
          consensus.vDeployments[Consensus::DEPLOYMENT_CSV].bit = 0;
          consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nStartTime = 1485561600; // January 28, 2017
          consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nTimeout = 1517356801; // January 31st, 2018
  
          // Deployment of SegWit (BIP141, BIP143, and BIP147)
          consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].bit = 1;
          consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nStartTime = 1485561600; // January 28, 2017
          consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nTimeout = 1517356801; // January 31st, 2018
  
          // 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("0x1673fa904a93848eca83d5ca82c7af974511a7e640e22edc2976420744f2e56a"); //1155631
  
          /**
           * 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] = 0xfd;
          pchMessageStart[1] = 0xc1;
          pchMessageStart[2] = 0xb7;
          pchMessageStart[3] = 0xdc;
          nDefaultPort = 34100;
          nPruneAfterHeight = 100000;
  
          genesis = CreateGenesisBlock(1523954692, 121662, 0x1e0ffff0, 1, 50 * COIN);
          consensus.hashGenesisBlock = genesis.GetHash();
          assert(consensus.hashGenesisBlock == uint256S("0x809e09e01f514818e4deb6a3eac0293ca02deea3f568806877d73daaeed53a8f"));
          assert(genesis.hashMerkleRoot == uint256S("0xdacb6672f264cd399724805373eb28a110ad09a02c8523ea5b7fe146dc26ff20"));
  
          // Note that of those with the service bits flag, most only support a subset of possible options
          //vSeeds.push_back(CDNSSeedData("loshan.co.uk", "seed-a.isc.loshan.co.uk", true));
          //vSeeds.push_back(CDNSSeedData("thrasher.io", "dnsseed.thrasher.io", true));
          //vSeeds.push_back(CDNSSeedData("isctools.com", "dnsseed.isctools.com"));
          //vSeeds.push_back(CDNSSeedData("iscpool.org", "dnsseed.iscpool.org"));
          //vSeeds.push_back(CDNSSeedData("koin-project.com", "dnsseed.koin-project.com"));
  
          base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,63);
          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] = 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));
  
          fMiningRequiresPeers = true;
          fDefaultConsistencyChecks = false;
          fRequireStandard = true;
          fMineBlocksOnDemand = false;
  
          checkpointData = (CCheckpointData) {
              boost::assign::map_list_of
              (1, uint256S("0xe7fee1f3c994ac3c6dd9126da8e638fac61d8889c52f9a733f72fd38d6f1040f"))
          };
  
          chainTxData = ChainTxData{
              0,0,0
          };
      }
  };
  static CMainParams mainParams;
  
  /**
   * Testnet (v3)
   */
  class CTestNetParams : public CChainParams {
  public:
      CTestNetParams() {
          strNetworkID = "test";
          consensus.nSubsidyHalvingInterval = 840000;
          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 = 1199145601; // January 1, 2008
          consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = 1230767999; // December 31, 2008
  
          // Deployment of BIP68, BIP112, and BIP113.
          consensus.vDeployments[Consensus::DEPLOYMENT_CSV].bit = 0;
          consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nStartTime = 1483228800; // January 1, 2017
          consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nTimeout = 1517356801; // January 31st, 2018
  
          // Deployment of SegWit (BIP141, BIP143, and BIP147)
          consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].bit = 1;
          consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nStartTime = 1483228800; // January 1, 2017
          consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nTimeout = 1517356801; // January 31st, 2018
  
          // 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("0x43a16a626ef2ffdbe928f2bc26dcd5475c6a1a04f9542dfc6a0a88e5fcf9bd4c"); //8711
  
          pchMessageStart[0] = 0xfd;
          pchMessageStart[1] = 0xd2;
          pchMessageStart[2] = 0xc8;
          pchMessageStart[3] = 0xf1;
          nDefaultPort = 34200;
          nPruneAfterHeight = 1000;
  
          genesis = CreateGenesisBlock(1486949366, 58748, 0x1e0ffff0, 1, 50 * COIN);
          consensus.hashGenesisBlock = genesis.GetHash();
          assert(consensus.hashGenesisBlock == uint256S("0x4d30936406be39b41b539e1bb223eddd4ea9a822b4e2d584c0b849d1c216718e"));
          assert(genesis.hashMerkleRoot == uint256S("0xdacb6672f264cd399724805373eb28a110ad09a02c8523ea5b7fe146dc26ff20"));
  
          vFixedSeeds.clear();
          vSeeds.clear();
          // nodes with support for servicebits filtering should be at the top
          //vSeeds.push_back(CDNSSeedData("isctools.com", "testnet-seed.isctools.com"));
          //vSeeds.push_back(CDNSSeedData("loshan.co.uk", "seed-b.isc.loshan.co.uk", true));
          //vSeeds.push_back(CDNSSeedData("thrasher.io", "dnsseed-testnet.thrasher.io", true));
  
          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] = 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));
  
          fMiningRequiresPeers = true;
          fDefaultConsistencyChecks = false;
          fRequireStandard = false;
          fMineBlocksOnDemand = false;
  
          checkpointData = (CCheckpointData) {
              boost::assign::map_list_of
              (0, uint256S("0x"))
          };
  
          chainTxData = ChainTxData{
              0,0,0
          };
  
      }
  };
  static CTestNetParams testNetParams;
  
  /**
   * Regression test
   */
  class CRegTestParams : public CChainParams {
  public:
      CRegTestParams() {
          strNetworkID = "regtest";
          consensus.nSubsidyHalvingInterval = 150;
          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 = 999999999999ULL;
          consensus.vDeployments[Consensus::DEPLOYMENT_CSV].bit = 0;
          consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nStartTime = 0;
          consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nTimeout = 999999999999ULL;
          consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].bit = 1;
          consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nStartTime = 0;
          consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nTimeout = 999999999999ULL;
  
          // 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, 4, 0x207fffff, 1, 50 * COIN);
          consensus.hashGenesisBlock = genesis.GetHash();
          assert(consensus.hashGenesisBlock == uint256S("0xa41c4c138838ad6e566af9095cfdde710b4b759777e6420a21bc907d3899c0c9"));
          assert(genesis.hashMerkleRoot == uint256S("0xdacb6672f264cd399724805373eb28a110ad09a02c8523ea5b7fe146dc26ff20"));
  
          vFixedSeeds.clear(); //!< Regtest mode doesn't have any fixed seeds.
          vSeeds.clear();      //!< Regtest mode doesn't have any DNS seeds.
  
          fMiningRequiresPeers = false;
          fDefaultConsistencyChecks = true;
          fRequireStandard = false;
          fMineBlocksOnDemand = true; 
  
          checkpointData = (CCheckpointData){
              boost::assign::map_list_of
              (0, uint256S("0x"))
          };
  
          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] = 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> >();
      }
  
      void UpdateBIP9Parameters(Consensus::DeploymentPos d, int64_t nStartTime, int64_t nTimeout)
      {
          consensus.vDeployments[d].nStartTime = nStartTime;
          consensus.vDeployments[d].nTimeout = nTimeout;
      }
  };
  static CRegTestParams regTestParams;
  
  static CChainParams *pCurrentParams = 0;
  
  const CChainParams &Params() {
      assert(pCurrentParams);
      return *pCurrentParams;
  }
  
  CChainParams& Params(const std::string& chain)
  {
      if (chain == CBaseChainParams::MAIN)
              return mainParams;
      else if (chain == CBaseChainParams::TESTNET)
              return testNetParams;
      else if (chain == CBaseChainParams::REGTEST)
              return regTestParams;
      else
          throw std::runtime_error(strprintf("%s: Unknown chain %s.", __func__, chain));
  }
  
  void SelectParams(const std::string& network)
  {
      SelectBaseParams(network);
      pCurrentParams = &Params(network);
  }
  
  void UpdateRegtestBIP9Parameters(Consensus::DeploymentPos d, int64_t nStartTime, int64_t nTimeout)
  {
      regTestParams.UpdateBIP9Parameters(d, nStartTime, nTimeout);
  }
  