src/rpcblockchain.cpp

   1 // Copyright (c) 2010 Satoshi Nakamoto
   2 // Copyright (c) 2009-2012 The Bitcoin developers
   3 // Distributed under the MIT/X11 software license, see the accompanying
   4 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
   5
   6 #include "main.h"
   7 #include "bitcoinrpc.h"
   8
   9 using namespace json_spirit;
  10 using namespace std;
  11
  12 extern void TxToJSON(const CTransaction& tx, const uint256 hashBlock, json_spirit::Object& entry);
  13 extern enum Checkpoints::CPMode CheckpointsMode;
  14
  15 double GetDifficulty(const CBlockIndex* blockindex)
  16 {
  17     // Floating point number that is a multiple of the minimum difficulty,
  18     // minimum difficulty = 1.0.
  19     if (blockindex == NULL)
  20     {
  21         if (pindexBest == NULL)
  22             return 1.0;
  23         else
  24             blockindex = GetLastBlockIndex(pindexBest, false);
  25     }
  26
  27     int nShift = (blockindex->nBits >> 24) & 0xff;
  28
  29     double dDiff =
  30         (double)0x0000ffff / (double)(blockindex->nBits & 0x00ffffff);
  31
  32     while (nShift < 29)
  33     {
  34         dDiff *= 256.0;
  35         nShift++;
  36     }
  37     while (nShift > 29)
  38     {
  39         dDiff /= 256.0;
  40         nShift--;
  41     }
  42
  43     return dDiff;
  44 }
  45
  46 double GetPoWMHashPS()
  47 {
  48     int nPoWInterval = 72;
  49     int64 nTargetSpacingWorkMin = 30, nTargetSpacingWork = 30;
  50
  51     CBlockIndex* pindex = pindexGenesisBlock;
  52     CBlockIndex* pindexPrevWork = pindexGenesisBlock;
  53
  54     while (pindex)
  55     {
  56         if (pindex->IsProofOfWork())
  57         {
  58             int64 nActualSpacingWork = pindex->GetBlockTime() - pindexPrevWork->GetBlockTime();
  59             nTargetSpacingWork = ((nPoWInterval - 1) * nTargetSpacingWork + nActualSpacingWork + nActualSpacingWork) / (nPoWInterval + 1);
  60             nTargetSpacingWork = max(nTargetSpacingWork, nTargetSpacingWorkMin);
  61             pindexPrevWork = pindex;
  62         }
  63
  64         pindex = pindex->pnext;
  65     }
  66
  67     return GetDifficulty() * 4294.967296 / nTargetSpacingWork;
  68 }
  69
  70 double GetPoSKernelPS()
  71 {
  72     int nPoSInterval = 72;
  73     double dStakeKernelsTriedAvg = 0;
  74     int nStakesHandled = 0, nStakesTime = 0;
  75
  76     CBlockIndex* pindex = pindexBest;;
  77     CBlockIndex* pindexPrevStake = NULL;
  78
  79     while (pindex && nStakesHandled < nPoSInterval)
  80     {
  81         if (pindex->IsProofOfStake())
  82         {
  83             dStakeKernelsTriedAvg += GetDifficulty(pindex) * 4294967296.0;
  84             nStakesTime += pindexPrevStake ? (pindexPrevStake->nTime - pindex->nTime) : 0;
  85             pindexPrevStake = pindex;
  86             nStakesHandled++;
  87         }
  88
  89         pindex = pindex->pprev;
  90     }
  91
  92     return dStakeKernelsTriedAvg / nStakesTime;
  93 }
  94
  95 Object blockToJSON(const CBlock& block, const CBlockIndex* blockindex, bool fPrintTransactionDetail)
  96 {
  97     Object result;
  98     result.push_back(Pair("hash", block.GetHash().GetHex()));
  99     CMerkleTx txGen(block.vtx[0]);
 100     txGen.SetMerkleBranch(&block);
 101     result.push_back(Pair("confirmations", (int)txGen.GetDepthInMainChain()));
 102     result.push_back(Pair("size", (int)::GetSerializeSize(block, SER_NETWORK, PROTOCOL_VERSION)));
 103     result.push_back(Pair("height", blockindex->nHeight));
 104     result.push_back(Pair("version", block.nVersion));
 105     result.push_back(Pair("merkleroot", block.hashMerkleRoot.GetHex()));
 106     result.push_back(Pair("mint", ValueFromAmount(blockindex->nMint)));
 107     result.push_back(Pair("time", (boost::int64_t)block.GetBlockTime()));
 108     result.push_back(Pair("nonce", (boost::uint64_t)block.nNonce));
 109     result.push_back(Pair("bits", HexBits(block.nBits)));
 110     result.push_back(Pair("difficulty", GetDifficulty(blockindex)));
 111     result.push_back(Pair("blocktrust", blockindex->GetBlockTrust().GetHex()));
 112     result.push_back(Pair("chaintrust", blockindex->nChainTrust.GetHex()));
 113     if (blockindex->pprev)
 114         result.push_back(Pair("previousblockhash", blockindex->pprev->GetBlockHash().GetHex()));
 115     if (blockindex->pnext)
 116         result.push_back(Pair("nextblockhash", blockindex->pnext->GetBlockHash().GetHex()));
 117
 118     result.push_back(Pair("flags", strprintf("%s%s", blockindex->IsProofOfStake()? "proof-of-stake" : "proof-of-work", blockindex->GeneratedStakeModifier()? " stake-modifier": "")));
 119     result.push_back(Pair("proofhash", blockindex->IsProofOfStake()? blockindex->hashProofOfStake.GetHex() : blockindex->GetBlockHash().GetHex()));
 120     result.push_back(Pair("entropybit", (int)blockindex->GetStakeEntropyBit()));
 121     result.push_back(Pair("modifier", strprintf("%016"PRI64x, blockindex->nStakeModifier)));
 122     result.push_back(Pair("modifierchecksum", strprintf("%08x", blockindex->nStakeModifierChecksum)));
 123     Array txinfo;
 124     BOOST_FOREACH (const CTransaction& tx, block.vtx)
 125     {
 126         if (fPrintTransactionDetail)
 127         {
 128             Object entry;
 129
 130             entry.push_back(Pair("txid", tx.GetHash().GetHex()));
 131             TxToJSON(tx, 0, entry);
 132
 133             txinfo.push_back(entry);
 134         }
 135         else
 136             txinfo.push_back(tx.GetHash().GetHex());
 137     }
 138
 139     result.push_back(Pair("tx", txinfo));
 140
 141     if ( block.IsProofOfStake() || (!fTestNet && block.GetBlockTime() < CHAINCHECKS_SWITCH_TIME) )
 142         result.push_back(Pair("signature", HexStr(block.vchBlockSig.begin(), block.vchBlockSig.end())));
 143
 144     return result;
 145 }
 146
 147 Value getbestblockhash(const Array& params, bool fHelp)
 148 {
 149     if (fHelp || params.size() != 0)
 150         throw runtime_error(
 151             "getbestblockhash\n"
 152             "Returns the hash of the best block in the longest block chain.");
 153
 154     return hashBestChain.GetHex();
 155 }
 156
 157 Value getblockcount(const Array& params, bool fHelp)
 158 {
 159     if (fHelp || params.size() != 0)
 160         throw runtime_error(
 161             "getblockcount\n"
 162             "Returns the number of blocks in the longest block chain.");
 163
 164     return nBestHeight;
 165 }
 166
 167
 168 Value getdifficulty(const Array& params, bool fHelp)
 169 {
 170     if (fHelp || params.size() != 0)
 171         throw runtime_error(
 172             "getdifficulty\n"
 173             "Returns the difficulty as a multiple of the minimum difficulty.");
 174
 175     Object obj;
 176     obj.push_back(Pair("proof-of-work",        GetDifficulty()));
 177     obj.push_back(Pair("proof-of-stake",       GetDifficulty(GetLastBlockIndex(pindexBest, true))));
 178     obj.push_back(Pair("search-interval",      (int)nLastCoinStakeSearchInterval));
 179     return obj;
 180 }
 181
 182
 183 Value settxfee(const Array& params, bool fHelp)
 184 {
 185     if (fHelp || params.size() < 1 || params.size() > 1 || AmountFromValue(params[0]) < MIN_TX_FEE)
 186         throw runtime_error(
 187             "settxfee <amount>\n"
 188             "<amount> is a real and is rounded to the nearest 0.01");
 189
 190     nTransactionFee = AmountFromValue(params[0]);
 191     nTransactionFee = (nTransactionFee / CENT) * CENT;  // round to cent
 192
 193     return true;
 194 }
 195
 196 Value getrawmempool(const Array& params, bool fHelp)
 197 {
 198     if (fHelp || params.size() != 0)
 199         throw runtime_error(
 200             "getrawmempool\n"
 201             "Returns all transaction ids in memory pool.");
 202
 203     vector<uint256> vtxid;
 204     mempool.queryHashes(vtxid);
 205
 206     Array a;
 207     BOOST_FOREACH(const uint256& hash, vtxid)
 208         a.push_back(hash.ToString());
 209
 210     return a;
 211 }
 212
 213 Value getblockhash(const Array& params, bool fHelp)
 214 {
 215     if (fHelp || params.size() != 1)
 216         throw runtime_error(
 217             "getblockhash <index>\n"
 218             "Returns hash of block in best-block-chain at <index>.");
 219
 220     int nHeight = params[0].get_int();
 221     if (nHeight < 0 || nHeight > nBestHeight)
 222         throw runtime_error("Block number out of range.");
 223
 224     CBlockIndex* pblockindex = FindBlockByHeight(nHeight);
 225     return pblockindex->phashBlock->GetHex();
 226 }
 227
 228 Value getblock(const Array& params, bool fHelp)
 229 {
 230     if (fHelp || params.size() < 1 || params.size() > 2)
 231         throw runtime_error(
 232             "getblock <hash> [txinfo]\n"
 233             "txinfo optional to print more detailed tx info\n"
 234             "Returns details of a block with given block-hash.");
 235
 236     std::string strHash = params[0].get_str();
 237     uint256 hash(strHash);
 238
 239     if (mapBlockIndex.count(hash) == 0)
 240         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Block not found");
 241
 242     CBlock block;
 243     CBlockIndex* pblockindex = mapBlockIndex[hash];
 244     block.ReadFromDisk(pblockindex, true);
 245
 246     return blockToJSON(block, pblockindex, params.size() > 1 ? params[1].get_bool() : false);
 247 }
 248
 249 Value getblockbynumber(const Array& params, bool fHelp)
 250 {
 251     if (fHelp || params.size() < 1 || params.size() > 2)
 252         throw runtime_error(
 253             "getblock <number> [txinfo]\n"
 254             "txinfo optional to print more detailed tx info\n"
 255             "Returns details of a block with given block-number.");
 256
 257     int nHeight = params[0].get_int();
 258     if (nHeight < 0 || nHeight > nBestHeight)
 259         throw runtime_error("Block number out of range.");
 260
 261     CBlock block;
 262     CBlockIndex* pblockindex = mapBlockIndex[hashBestChain];
 263     while (pblockindex->nHeight > nHeight)
 264         pblockindex = pblockindex->pprev;
 265
 266     uint256 hash = *pblockindex->phashBlock;
 267
 268     pblockindex = mapBlockIndex[hash];
 269     block.ReadFromDisk(pblockindex, true);
 270
 271     return blockToJSON(block, pblockindex, params.size() > 1 ? params[1].get_bool() : false);
 272 }
 273
 274 // ppcoin: get information of sync-checkpoint
 275 Value getcheckpoint(const Array& params, bool fHelp)
 276 {
 277     if (fHelp || params.size() != 0)
 278         throw runtime_error(
 279             "getcheckpoint\n"
 280             "Show info of synchronized checkpoint.\n");
 281
 282     Object result;
 283     CBlockIndex* pindexCheckpoint;
 284
 285     result.push_back(Pair("synccheckpoint", Checkpoints::hashSyncCheckpoint.ToString().c_str()));
 286     pindexCheckpoint = mapBlockIndex[Checkpoints::hashSyncCheckpoint];
 287     result.push_back(Pair("height", pindexCheckpoint->nHeight));
 288     result.push_back(Pair("timestamp", DateTimeStrFormat(pindexCheckpoint->GetBlockTime()).c_str()));
 289
 290     // Check that the block satisfies synchronized checkpoint
 291     if (CheckpointsMode == Checkpoints::STRICT)
 292         result.push_back(Pair("policy", "strict"));
 293
 294     if (CheckpointsMode == Checkpoints::ADVISORY)
 295         result.push_back(Pair("policy", "advisory"));
 296
 297     if (CheckpointsMode == Checkpoints::PERMISSIVE)
 298         result.push_back(Pair("policy", "permissive"));
 299
 300     if (mapArgs.count("-checkpointkey"))
 301         result.push_back(Pair("checkpointmaster", true));
 302
 303     return result;
 304 }