text: // Copyright (c) 2010 Satoshi Nakamoto
  // Copyright (c) 2009-2012 The Bitcoin developers
  // Distributed under the MIT/X11 software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #include "main.h"
  #include "db.h"
  #include "init.h"
  #include "bitcoinrpc.h"
  
  using namespace json_spirit;
  using namespace std;
  
  Value getgenerate(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() != 0)
          throw runtime_error(
              "getgenerate\n"
              "Returns true or false.");
  
      return GetBoolArg("-gen");
  }
  
  
  Value setgenerate(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() < 1 || params.size() > 2)
          throw runtime_error(
              "setgenerate <generate> [genproclimit]\n"
              "<generate> is true or false to turn generation on or off.\n"
              "Generation is limited to [genproclimit] processors, -1 is unlimited.");
  
      bool fGenerate = true;
      if (params.size() > 0)
          fGenerate = params[0].get_bool();
  
      if (params.size() > 1)
      {
          int nGenProcLimit = params[1].get_int();
          mapArgs["-genproclimit"] = itostr(nGenProcLimit);
          if (nGenProcLimit == 0)
              fGenerate = false;
      }
      mapArgs["-gen"] = (fGenerate ? "1" : "0");
  
      GenerateBitcoins(fGenerate, pwalletMain);
      return Value::null;
  }
  
  
  Value gethashespersec(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() != 0)
          throw runtime_error(
              "gethashespersec\n"
              "Returns a recent hashes per second performance measurement while generating.");
  
      if (GetTimeMillis() - nHPSTimerStart > 8000)
          return (boost::int64_t)0;
      return (boost::int64_t)dHashesPerSec;
  }
  
  
  Value getmininginfo(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() != 0)
          throw runtime_error(
              "getmininginfo\n"
              "Returns an object containing mining-related information.");
  
      Object obj;
      obj.push_back(Pair("blocks",        (int)nBestHeight));
      obj.push_back(Pair("currentblocksize",(uint64_t)nLastBlockSize));
      obj.push_back(Pair("currentblocktx",(uint64_t)nLastBlockTx));
      obj.push_back(Pair("difficulty",    (double)GetDifficulty()));
      obj.push_back(Pair("errors",        GetWarnings("statusbar")));
      obj.push_back(Pair("generate",      GetBoolArg("-gen")));
      obj.push_back(Pair("genproclimit",  (int)GetArg("-genproclimit", -1)));
      obj.push_back(Pair("hashespersec",  gethashespersec(params, false)));
  	obj.push_back(Pair("networkhashps", getnetworkhashps(params, false)));
      obj.push_back(Pair("pooledtx",      (uint64_t)mempool.size()));
      obj.push_back(Pair("testnet",       fTestNet));
      return obj;
  }
  
  // Litecoin: Return average network hashes per second based on last number of blocks.
  Value GetNetworkHashPS(int lookup) {
      if (pindexBest == NULL)
          return 0;
  
      // If lookup is -1, then use blocks since last difficulty change.
      if (lookup <= 0)
          lookup = pindexBest->nHeight % 2016 + 1;
  
      // If lookup is larger than chain, then set it to chain length.
      if (lookup > pindexBest->nHeight)
          lookup = pindexBest->nHeight;
  
      CBlockIndex* pindexPrev = pindexBest;
      for (int i = 0; i < lookup; i++)
          pindexPrev = pindexPrev->pprev;
  
      double timeDiff = pindexBest->GetBlockTime() - pindexPrev->GetBlockTime();
      double timePerBlock = timeDiff / lookup;
  
      return (boost::int64_t)(((double)GetDifficulty() * pow(2.0, 32)) / timePerBlock);
  }
  
  Value getnetworkhashps(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() > 1)
          throw runtime_error(
              "getnetworkhashps [blocks]\n"
              "Returns the estimated network hashes per second based on the last 120 blocks.\n"
              "Pass in [blocks] to override # of blocks, -1 specifies since last difficulty change.");
  
      return GetNetworkHashPS(params.size() > 0 ? params[0].get_int() : 120);
  }
  
  
  Value getworkex(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() > 2)
          throw runtime_error(
              "getworkex [data, coinbase]\n"
              "If [data, coinbase] is not specified, returns extended work data.\n"
          );
  
      if (vNodes.empty())
          throw JSONRPCError(-9, "BLVcoin is not connected!");
  
      if (IsInitialBlockDownload())
          throw JSONRPCError(-10, "BLVcoin is downloading blocks...");
  
      typedef map<uint256, pair<CBlock*, CScript> > mapNewBlock_t;
      static mapNewBlock_t mapNewBlock;
      static vector<CBlock*> vNewBlock;
      static CReserveKey reservekey(pwalletMain);
  
      if (params.size() == 0)
      {
          // Update block
          static unsigned int nTransactionsUpdatedLast;
          static CBlockIndex* pindexPrev;
          static int64 nStart;
          static CBlock* pblock;
          if (pindexPrev != pindexBest ||
              (nTransactionsUpdated != nTransactionsUpdatedLast && GetTime() - nStart > 60))
          {
              if (pindexPrev != pindexBest)
              {
                  // Deallocate old blocks since they're obsolete now
                  mapNewBlock.clear();
                  BOOST_FOREACH(CBlock* pblock, vNewBlock)
                      delete pblock;
                  vNewBlock.clear();
              }
              nTransactionsUpdatedLast = nTransactionsUpdated;
              pindexPrev = pindexBest;
              nStart = GetTime();
  
              // Create new block
              pblock = CreateNewBlock(pwalletMain);
              if (!pblock)
                  throw JSONRPCError(-7, "Out of memory");
              vNewBlock.push_back(pblock);
          }
  
          // Update nTime
          pblock->nTime = max(pindexPrev->GetMedianTimePast()+1, GetAdjustedTime());
          pblock->nNonce = 0;
  
          // Update nExtraNonce
          static unsigned int nExtraNonce = 0;
          IncrementExtraNonce(pblock, pindexPrev, nExtraNonce);
  
          // Save
          mapNewBlock[pblock->hashMerkleRoot] = make_pair(pblock, pblock->vtx[0].vin[0].scriptSig);
  
          // Prebuild hash buffers
          char pmidstate[32];
          char pdata[128];
          char phash1[64];
          FormatHashBuffers(pblock, pmidstate, pdata, phash1);
  
          uint256 hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256();
  
          CTransaction coinbaseTx = pblock->vtx[0];
          std::vector<uint256> merkle = pblock->GetMerkleBranch(0);
  
          Object result;
          result.push_back(Pair("data",     HexStr(BEGIN(pdata), END(pdata))));
          result.push_back(Pair("target",   HexStr(BEGIN(hashTarget), END(hashTarget))));
  
          CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION);
          ssTx << coinbaseTx;
          result.push_back(Pair("coinbase", HexStr(ssTx.begin(), ssTx.end())));
  
          Array merkle_arr;
  
          BOOST_FOREACH(uint256 merkleh, merkle) {
              merkle_arr.push_back(HexStr(BEGIN(merkleh), END(merkleh)));
          }
  
          result.push_back(Pair("merkle", merkle_arr));
  
  
          return result;
      }
      else
      {
          // Parse parameters
          vector<unsigned char> vchData = ParseHex(params[0].get_str());
          vector<unsigned char> coinbase;
  
          if(params.size() == 2)
              coinbase = ParseHex(params[1].get_str());
  
          if (vchData.size() != 128)
              throw JSONRPCError(-8, "Invalid parameter");
  
          CBlock* pdata = (CBlock*)&vchData[0];
  
          // Byte reverse
          for (int i = 0; i < 128/4; i++)
              ((unsigned int*)pdata)[i] = ByteReverse(((unsigned int*)pdata)[i]);
  
          // Get saved block
          if (!mapNewBlock.count(pdata->hashMerkleRoot))
              return false;
          CBlock* pblock = mapNewBlock[pdata->hashMerkleRoot].first;
  
          pblock->nTime = pdata->nTime;
          pblock->nNonce = pdata->nNonce;
  
          if(coinbase.size() == 0)
              pblock->vtx[0].vin[0].scriptSig = mapNewBlock[pdata->hashMerkleRoot].second;
          else
              CDataStream(coinbase, SER_NETWORK, PROTOCOL_VERSION) >> pblock->vtx[0]; // FIXME - HACK!
  
          pblock->hashMerkleRoot = pblock->BuildMerkleTree();
  
          if (!pblock->SignBlock(*pwalletMain))
              throw JSONRPCError(-100, "Unable to sign block, wallet locked?");
  
          return CheckWork(pblock, *pwalletMain, reservekey);
      }
  }
  
  
  Value getwork(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() > 1)
          throw runtime_error(
              "getwork [data]\n"
              "If [data] is not specified, returns formatted hash data to work on:\n"
              "  \"midstate\" : precomputed hash state after hashing the first half of the data (DEPRECATED)\n" // deprecated
              "  \"data\" : block data\n"
              "  \"hash1\" : formatted hash buffer for second hash (DEPRECATED)\n" // deprecated
              "  \"target\" : little endian hash target\n"
              "If [data] is specified, tries to solve the block and returns true if it was successful.");
  
      if (vNodes.empty())
          throw JSONRPCError(RPC_CLIENT_NOT_CONNECTED, "BLVcoin is not connected!");
  
      if (IsInitialBlockDownload())
          throw JSONRPCError(RPC_CLIENT_IN_INITIAL_DOWNLOAD, "BLVcoin is downloading blocks...");
  
      typedef map<uint256, pair<CBlock*, CScript> > mapNewBlock_t;
      static mapNewBlock_t mapNewBlock;    // FIXME: thread safety
      static vector<CBlock*> vNewBlock;
      static CReserveKey reservekey(pwalletMain);
  
      if (params.size() == 0)
      {
          // Update block
          static unsigned int nTransactionsUpdatedLast;
          static CBlockIndex* pindexPrev;
          static int64 nStart;
          static CBlock* pblock;
          if (pindexPrev != pindexBest ||
              (nTransactionsUpdated != nTransactionsUpdatedLast && GetTime() - nStart > 60))
          {
              if (pindexPrev != pindexBest)
              {
                  // Deallocate old blocks since they're obsolete now
                  mapNewBlock.clear();
                  BOOST_FOREACH(CBlock* pblock, vNewBlock)
                      delete pblock;
                  vNewBlock.clear();
              }
  
              // Clear pindexPrev so future getworks make a new block, despite any failures from here on
              pindexPrev = NULL;
  
              // Store the pindexBest used before CreateNewBlock, to avoid races
              nTransactionsUpdatedLast = nTransactionsUpdated;
              CBlockIndex* pindexPrevNew = pindexBest;
              nStart = GetTime();
  
              // Create new block
              pblock = CreateNewBlock(pwalletMain);
              if (!pblock)
                  throw JSONRPCError(RPC_OUT_OF_MEMORY, "Out of memory");
              vNewBlock.push_back(pblock);
  
              // Need to update only after we know CreateNewBlock succeeded
              pindexPrev = pindexPrevNew;
          }
  
          // Update nTime
          pblock->UpdateTime(pindexPrev);
          pblock->nNonce = 0;
  
          // Update nExtraNonce
          static unsigned int nExtraNonce = 0;
          IncrementExtraNonce(pblock, pindexPrev, nExtraNonce);
  
          // Save
          mapNewBlock[pblock->hashMerkleRoot] = make_pair(pblock, pblock->vtx[0].vin[0].scriptSig);
  
          // Pre-build hash buffers
          char pmidstate[32];
          char pdata[128];
          char phash1[64];
          FormatHashBuffers(pblock, pmidstate, pdata, phash1);
  
          uint256 hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256();
  
          Object result;
          result.push_back(Pair("midstate", HexStr(BEGIN(pmidstate), END(pmidstate)))); // deprecated
          result.push_back(Pair("data",     HexStr(BEGIN(pdata), END(pdata))));
          result.push_back(Pair("hash1",    HexStr(BEGIN(phash1), END(phash1)))); // deprecated
          result.push_back(Pair("target",   HexStr(BEGIN(hashTarget), END(hashTarget))));
          return result;
      }
      else
      {
          // Parse parameters
          vector<unsigned char> vchData = ParseHex(params[0].get_str());
          if (vchData.size() != 128)
              throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter");
          CBlock* pdata = (CBlock*)&vchData[0];
  
          // Byte reverse
          for (int i = 0; i < 128/4; i++)
              ((unsigned int*)pdata)[i] = ByteReverse(((unsigned int*)pdata)[i]);
  
          // Get saved block
          if (!mapNewBlock.count(pdata->hashMerkleRoot))
              return false;
          CBlock* pblock = mapNewBlock[pdata->hashMerkleRoot].first;
  
          pblock->nTime = pdata->nTime;
          pblock->nNonce = pdata->nNonce;
          pblock->vtx[0].vin[0].scriptSig = mapNewBlock[pdata->hashMerkleRoot].second;
          pblock->hashMerkleRoot = pblock->BuildMerkleTree();
  
          if (!pblock->SignBlock(*pwalletMain))
              throw JSONRPCError(-100, "Unable to sign block, wallet locked?");
  
          return CheckWork(pblock, *pwalletMain, reservekey);
      }
  }
  
  
  Value getblocktemplate(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() > 1)
          throw runtime_error(
              "getblocktemplate [params]\n"
              "Returns data needed to construct a block to work on:\n"
              "  \"version\" : block version\n"
              "  \"previousblockhash\" : hash of current highest block\n"
              "  \"transactions\" : contents of non-coinbase transactions that should be included in the next block\n"
              "  \"coinbaseaux\" : data that should be included in coinbase\n"
              "  \"coinbasevalue\" : maximum allowable input to coinbase transaction, including the generation award and transaction fees\n"
              "  \"target\" : hash target\n"
              "  \"mintime\" : minimum timestamp appropriate for next block\n"
              "  \"curtime\" : current timestamp\n"
              "  \"mutable\" : list of ways the block template may be changed\n"
              "  \"noncerange\" : range of valid nonces\n"
              "  \"sigoplimit\" : limit of sigops in blocks\n"
              "  \"sizelimit\" : limit of block size\n"
              "  \"bits\" : compressed target of next block\n"
              "  \"height\" : height of the next block\n"
              "See https://en.bitcoin.it/wiki/BIP_0022 for full specification.");
  
      std::string strMode = "template";
      if (params.size() > 0)
      {
          const Object& oparam = params[0].get_obj();
          const Value& modeval = find_value(oparam, "mode");
          if (modeval.type() == str_type)
              strMode = modeval.get_str();
          else if (modeval.type() == null_type)
          {
              /* Do nothing */
          }
          else
              throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid mode");
      }
  
      if (strMode != "template")
          throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid mode");
  
      if (vNodes.empty())
          throw JSONRPCError(RPC_CLIENT_NOT_CONNECTED, "BLVcoin is not connected!");
  
      if (IsInitialBlockDownload())
          throw JSONRPCError(RPC_CLIENT_IN_INITIAL_DOWNLOAD, "BLVcoin is downloading blocks...");
  
      static CReserveKey reservekey(pwalletMain);
  
      // Update block
      static unsigned int nTransactionsUpdatedLast;
      static CBlockIndex* pindexPrev;
      static int64 nStart;
      static CBlock* pblock;
      if (pindexPrev != pindexBest ||
          (nTransactionsUpdated != nTransactionsUpdatedLast && GetTime() - nStart > 5))
      {
          // Clear pindexPrev so future calls make a new block, despite any failures from here on
          pindexPrev = NULL;
  
          // Store the pindexBest used before CreateNewBlock, to avoid races
          nTransactionsUpdatedLast = nTransactionsUpdated;
          CBlockIndex* pindexPrevNew = pindexBest;
          nStart = GetTime();
  
          // Create new block
          if(pblock)
          {
              delete pblock;
              pblock = NULL;
          }
          pblock = CreateNewBlock(pwalletMain);
          if (!pblock)
              throw JSONRPCError(RPC_OUT_OF_MEMORY, "Out of memory");
  
          // Need to update only after we know CreateNewBlock succeeded
          pindexPrev = pindexPrevNew;
      }
  
      // Update nTime
      pblock->UpdateTime(pindexPrev);
      pblock->nNonce = 0;
  
      Array transactions;
      map<uint256, int64_t> setTxIndex;
      int i = 0;
      CTxDB txdb("r");
      BOOST_FOREACH (CTransaction& tx, pblock->vtx)
      {
          uint256 txHash = tx.GetHash();
          setTxIndex[txHash] = i++;
  
          if (tx.IsCoinBase() || tx.IsCoinStake())
              continue;
  
          Object entry;
  
          CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION);
          ssTx << tx;
          entry.push_back(Pair("data", HexStr(ssTx.begin(), ssTx.end())));
  
          entry.push_back(Pair("hash", txHash.GetHex()));
  
          MapPrevTx mapInputs;
          map<uint256, CTxIndex> mapUnused;
          bool fInvalid = false;
          if (tx.FetchInputs(txdb, mapUnused, false, false, mapInputs, fInvalid))
          {
              entry.push_back(Pair("fee", (int64_t)(tx.GetValueIn(mapInputs) - tx.GetValueOut())));
  
              Array deps;
              BOOST_FOREACH (MapPrevTx::value_type& inp, mapInputs)
              {
                  if (setTxIndex.count(inp.first))
                      deps.push_back(setTxIndex[inp.first]);
              }
              entry.push_back(Pair("depends", deps));
  
              int64_t nSigOps = tx.GetLegacySigOpCount();
              nSigOps += tx.GetP2SHSigOpCount(mapInputs);
              entry.push_back(Pair("sigops", nSigOps));
          }
  
          transactions.push_back(entry);
      }
  
      Object aux;
      aux.push_back(Pair("flags", HexStr(COINBASE_FLAGS.begin(), COINBASE_FLAGS.end())));
  
      uint256 hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256();
  
      static Array aMutable;
      if (aMutable.empty())
      {
          aMutable.push_back("time");
          aMutable.push_back("transactions");
          aMutable.push_back("prevblock");
      }
  
      Object result;
      result.push_back(Pair("version", pblock->nVersion));
      result.push_back(Pair("previousblockhash", pblock->hashPrevBlock.GetHex()));
      result.push_back(Pair("transactions", transactions));
      result.push_back(Pair("coinbaseaux", aux));
      result.push_back(Pair("coinbasevalue", (int64_t)pblock->vtx[0].vout[0].nValue));
      result.push_back(Pair("target", hashTarget.GetHex()));
      result.push_back(Pair("mintime", (int64_t)pindexPrev->GetMedianTimePast()+1));
      result.push_back(Pair("mutable", aMutable));
      result.push_back(Pair("noncerange", "00000000ffffffff"));
      result.push_back(Pair("sigoplimit", (int64_t)MAX_BLOCK_SIGOPS));
      result.push_back(Pair("sizelimit", (int64_t)MAX_BLOCK_SIZE));
      result.push_back(Pair("curtime", (int64_t)pblock->nTime));
      result.push_back(Pair("bits", HexBits(pblock->nBits)));
      result.push_back(Pair("height", (int64_t)(pindexPrev->nHeight+1)));
  
      return result;
  }
  
  Value submitblock(const Array& params, bool fHelp)
  {
      if (fHelp || params.size() < 1 || params.size() > 2)
          throw runtime_error(
              "submitblock <hex data> [optional-params-obj]\n"
              "[optional-params-obj] parameter is currently ignored.\n"
              "Attempts to submit new block to network.\n"
              "See https://en.bitcoin.it/wiki/BIP_0022 for full specification.");
  
      vector<unsigned char> blockData(ParseHex(params[0].get_str()));
      CDataStream ssBlock(blockData, SER_NETWORK, PROTOCOL_VERSION);
      CBlock block;
      try {
          ssBlock >> block;
      }
      catch (std::exception &e) {
          throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "Block decode failed");
      }
  
      if (!block.SignBlock(*pwalletMain))
          throw JSONRPCError(-100, "Unable to sign block, wallet locked?");
  
      bool fAccepted = ProcessBlock(NULL, &block);
      if (!fAccepted)
          return "rejected";
  
      return Value::null;
  }
  
  